Single-coil magnetic coupling type wireless power supply and signal synchronous transmission torque sensor

Abstract

The invention discloses a single-coil magnetic coupling type wireless power supply and signal synchronous transmission torque sensor, which comprises a rotor assembly and a stator assembly, and is characterized in that the rotor assembly comprises a torque acquisition module, a first signal control and processing module, a first power supply conditioning module, a first coil, a first transformer and a first composite transmission module; the first composite transmission module, the first secondary coil and the first coil form a series loop; the first primary coil and the first signal control and processing module form a high-frequency resonance network; the stator assembly comprises a second signal control and processing module, a second power supply conditioning module, a communication module, a second coil, a second transformer and a second composite transmission module; the second coil, a second secondary coil and the second composite transmission module form a series loop; the second primary coil and the second signal control and processing module form a high-frequency resonance network; the invention has the advantages of simultaneously realizing electric energy and signal transmission through a pair of coils, being small in assembly difficulty, low in cost and high in long-term operation reliability.

Description

Technical Field

[0001] This invention relates to torque sensors, and more particularly to a single-coil magnetically coupled wireless power supply and signal synchronous transmission torque sensor. Background Technology

[0002] The ship's propulsion system is the core of its navigation, and the operating status of its shafting directly affects navigational safety. Torque, as a key indicator reflecting the performance of the ship's propulsion system, needs to be accurately monitored to ensure its stability. Torque sensors are the core equipment for this monitoring, with strain gauge torque sensors becoming the mainstream due to their maturity and reliability.

[0003] like Figure 1 As shown, existing strain gauge torque sensors are typically based on a dual-coil design, comprising a rotor assembly and a stator assembly. The rotor assembly includes a power receiving coil, a first signal interaction coil, a torque acquisition module, a first signal control and processing module, a first power conditioning module, a first bidirectional data transmission module, and a communication module; the stator assembly includes a power transmitting coil, a second signal interaction coil, a second signal control and processing module, a second power conditioning module, a second bidirectional data transmission module, and a power transmitting module.

[0004] The specific working process of this strain gauge torque sensor is as follows: When the second power conditioning module is connected to an external power source, it converts the DC power supplied by the external power source into the operating voltage required by the second signal control and processing module, the second data bidirectional transmission module, and the power transmission module, respectively, thus powering these modules. The power transmission module generates AC power and outputs it to the power transmission coil, which in turn generates an alternating magnetic field. At this time, the power receiving coil and the power transmission coil are electromagnetically coupled, and the power receiving coil generates AC power and outputs it to the power receiving module. The power receiving module rectifies the AC power to obtain DC power, which is then output to the first power conditioning module. The power conditioning module converts the DC power supplied to it into the operating voltage required by the torque acquisition module, the first signal control and processing module, and the first bidirectional data transmission module, respectively, thus powering these modules. At this time, the strain gauge torque sensor is powered on, and the torque acquisition module, the first signal control and processing module, and the first bidirectional data transmission module enter the working state. Subsequently, the power supply line consisting of the second power conditioning module, the power transmission module, the power transmission coil, the power receiving coil, the power receiving module, and the first power conditioning module continues to operate. The strain gauge torque sensor operates periodically under the control of the terminal device until the operation ends, at which point the second power conditioning module is disconnected from the external power supply.In each working cycle, firstly, the terminal device sends a preset control signal to the second signal control and processing module via the communication module. The second signal control and processing module generates a corresponding control signal, which is then loaded onto the second signal interaction coil via the second data bidirectional transmission module. The second signal interaction coil generates a corresponding alternating magnetic field, and the first signal interaction coil and the second signal interaction coil become electromagnetically coupled. The first signal interaction coil generates a corresponding alternating current output to the first data bidirectional transmission module. The first data bidirectional transmission module converts the input alternating current into a corresponding electrical signal and transmits it to the first signal control and processing module. The first signal control and processing module demodulates the control signal based on the input electrical signal and controls the torque acquisition module to acquire external torque signals based on the control signal. The module converts the external torque signal into an electrical signal and outputs it to the first signal control and processing module. The first signal control and processing module outputs the received electrical signal to the first bidirectional data transmission module. The first bidirectional data transmission module converts the received electrical signal into a corresponding alternating current and loads it onto the first signal interaction coil. The first signal interaction coil generates a corresponding alternating magnetic field. The second signal interaction coil is electromagnetically coupled to the first signal interaction coil. The second signal interaction coil generates a corresponding alternating current and outputs it to the second bidirectional data transmission module. The second bidirectional data transmission module converts the alternating current into a corresponding electrical signal and transmits it to the second signal control and processing module. The second signal control and processing module demodulates the electrical signal to obtain the torque signal, which is then output to the back-end device through the communication module, completing one working cycle.

[0005] The aforementioned strain gauge torque sensor relies on two pairs of independent coils. In practical applications, both pairs of coils need to be wound and fixed to the walls of the stator and rotor assemblies. Furthermore, during installation, they must precisely match the external contours of the stator and rotor assemblies. This installation method limits the coil installation space due to the structure of the stator and rotor assemblies, requiring strict control of the coil's fit to the wall during assembly, making assembly very difficult. Additionally, because the stator and rotor assemblies of different marine propulsion systems vary in dimensional parameters such as radius and length, neither pair of coils can use standardized specifications. Custom winding based on the specific dimensions of the stator and rotor assemblies is necessary. Currently, there is no unified standardized winding process in the industry. The winding process relies on manual experience to control the coil winding density, number of turns, and flatness, resulting in high overall process complexity and cost. Regarding coil dimensions, the winding radius must be consistent with the radius of the stator and rotor assemblies. However, the stator and rotor assemblies of marine propulsion systems are inherently large to meet the demands of high-power transmission, forcing an increase in the coil winding radius and consequently increasing the overall coil volume. Larger coils not only increase material costs, make winding process control more difficult, and raise quality control requirements in production, further increasing process costs, but also, due to space constraints, the winding positions of the two pairs of coils will be closer. The electromagnetic field generated by the power receiving coil and the power transmitting coil during power transmission can easily interfere with the electromagnetic field generated by the first signal interaction coil and the second signal interaction coil to transmit torque signals, thus causing torque signal distortion and ultimately reducing the long-term reliability of the sensor.

[0006] Therefore, existing variable torque sensors are difficult to assemble, costly, and have low long-term reliability. Summary of the Invention

[0007] The technical problem to be solved by the present invention is to provide a single-coil magnetic coupling wireless power supply and signal synchronous transmission torque sensor that can realize power transmission and signal transmission simultaneously through only a pair of coils, with low assembly difficulty, low cost, and high long-term operational reliability.

[0008] The technical solution adopted by this invention to solve the above-mentioned technical problems is as follows: a single-coil magnetically coupled wireless power supply and signal synchronous transmission torque sensor, including a rotor assembly and a stator assembly; the rotor assembly includes a torque acquisition module, a first signal control and processing module, a first power conditioning module, and a first coil; the torque acquisition module is connected to the first signal control and processing module, and the first power conditioning module is connected to both the torque acquisition module and the first signal control and processing module; the stator assembly includes a second signal control and processing module, a second power conditioning module, a communication module, and a second coil; the second signal control and processing module is connected to the communication module, and the second power conditioning module is connected to the second signal control and processing module. The first coil and the second coil are connected to the signal control and processing module; the first coil and the second coil can generate corresponding alternating current through electromagnetic coupling; the rotor assembly further includes a first transformer and a first composite transmission module; the first transformer has a primary coil and a secondary coil, the primary coil being called the first primary coil and the secondary coil being called the first secondary coil; one end of the first primary coil is connected to the first signal control and processing module, and the other end is grounded; one end of the first secondary coil is connected to the first composite transmission module, and the other end is connected to one end of the first coil; the other end of the first coil is connected to the first composite transmission module, and the first composite transmission module is connected to the first power conditioning module; The first composite transmission module, the first primary coil, and the first coil constitute a first series circuit; the first primary coil and the first signal control and processing module constitute a first high-frequency resonant network; the first high-frequency resonant network is used to amplify the high-frequency AC output from the first signal control and processing module and inject it into the first series circuit, and to select the frequency of the low-frequency mixed AC in the first series circuit, amplify the high-frequency AC, and output it to the first signal control and processing module; when the first coil and the second coil are electromagnetically coupled to generate low-frequency AC injected into the first series circuit, the first composite transmission module will receive the low-frequency AC; when the first high-frequency resonant network... When high-frequency alternating current is injected into the first series circuit, it superimposed with the low-frequency alternating current already injected into the first series circuit to form a low-to-high-frequency mixed alternating current, causing the first coil to generate a low-to-high-frequency mixed alternating current. When high-frequency alternating current is generated by the first coil and injected into the first series circuit due to electromagnetic coupling, it superimposed with the low-frequency alternating current already injected into the first series circuit to form a low-to-high-frequency mixed alternating current loaded onto the first primary coil. The first composite transmission module and the first coil form a low-frequency resonant network, converting the low-frequency alternating current in the first series circuit into direct current and outputting it to the first power conditioning module. The stator assembly also includes a second transformer and a second composite transmission module.The second transformer has a primary coil and a secondary coil, the primary coil being referred to as the second primary coil and the secondary coil as the second secondary coil. One end of the second primary coil is connected to the second signal control and processing module, and the other end is grounded. One end of the second secondary coil is connected to the second composite transmission module, and the other end is connected to one end of the second coil. The other end of the second coil is connected to the second composite transmission module, which is connected to the second power conditioning module. The second coil, the second secondary coil, and the second composite transmission module form a second series circuit. The second primary coil and the second signal control and processing module form a second high-frequency resonant network. The second high-frequency resonant network is used to amplify the high-frequency AC output from the second signal control and processing module. The second series circuit is injected with AC power, and the low-to-high frequency mixed AC power generated in the second series circuit is frequency-selected. The high-frequency AC power is amplified and output to the second signal control and processing module. The second composite transmission module and the second coil form a low-frequency resonant network. When the low-frequency AC power generated by the second composite transmission module is injected into the second series circuit, it will cause the second coil to generate low-frequency AC power. When the second high-frequency resonant network injects high-frequency AC power into the second series circuit, the high-frequency AC power will be superimposed with the low-frequency AC power already injected into the second series circuit, causing the second coil to generate a low-to-high frequency mixed AC power. When the low-to-high frequency mixed AC power generated by the second coil due to electromagnetic coupling with the first coil is injected into the second series circuit, the low-to-high frequency mixed AC power is loaded onto the second-stage coil.

[0009] Compared with the prior art, the advantages of the present invention are that by setting a first transformer and a first composite transmission module including a first primary coil and a first secondary coil at the rotor assembly, and setting a second transformer and a second composite transmission module including a second primary coil and a second secondary coil at the stator assembly, the first composite transmission module can form a first low-frequency resonant network with the first coil, and the first composite transmission module, the first secondary coil, and the first coil constitute a first series circuit; the first primary coil and the first signal control and processing module constitute a first high-frequency resonant network, the second primary coil and the second signal control and processing module constitute a second high-frequency resonant network, and the second coil, the second secondary coil, and the second composite transmission module constitute a second series circuit. The first high-frequency resonant network amplifies the high-frequency AC output from the first signal control and processing module, and injects the amplified high-frequency AC into the first series circuit through electromagnetic coupling between the first primary coil and the first secondary coil. This induces and generates high-frequency AC in the first coil, which is then converted into DC by the first low-frequency resonant network and output to the first power conditioning module. The network also induces low- and high-frequency AC in the first series circuit through electromagnetic coupling between the first primary coil and the first secondary coil, selects the frequency of the low- and high-frequency AC, filters out interference from the low-frequency AC, and amplifies the high-frequency AC before outputting it to the first signal control and processing module. The second high-frequency resonant network amplifies the output from the second signal control and processing module. The high-frequency AC current is amplified and injected into the second series circuit through electromagnetic coupling between the second primary coil and the second secondary coil, thereby generating high-frequency AC current in the second coil. The low- and high-frequency mixed AC current generated in the second series circuit is frequency-selected, and the amplified high-frequency AC current is output to the second signal control and processing module. Furthermore, the second composite transmission module can also form a second low-frequency resonant network with the second coil. Under the control of the second signal control and processing module, it generates low-frequency AC current to be applied to the second coil, thereby generating low-frequency AC current for power supply. When the torque sensor is working, the second power conditioning module converts the DC current supplied by the external power supply into the second signal control and processing module. The operating voltage required by the module and the second composite transmission module supplies power to the second signal control and processing module and the second composite transmission module. When the terminal device sends a power-on command to the second signal control and processing module through the communication module, the second signal control and processing module outputs a power supply control signal to control the second composite transmission module to generate low-frequency AC power. At this time, the low-frequency AC power is injected into the second series circuit and loaded onto the second coil, causing the second coil to generate low-frequency AC power. The first coil generates low-frequency AC power due to electromagnetic coupling with the second coil and injects it into the first series circuit. At this time, the low-frequency AC power is loaded onto the first composite transmission module, and the first composite transmission module converts the low-frequency AC power into DC power and transmits it to the first power conditioning module.The first power conditioning module converts the DC power into the operating voltage required by the first signal control and processing module and the torque acquisition module, thus powering the torque sensor and enabling it to start. Afterward, the second signal control and processing module continuously sends power control signals to the second composite transmission module. This means the second composite transmission module continues to generate low-frequency AC power and inject it into the second series circuit. The second coil continues to generate low-frequency AC power, the first coil continues to generate low-frequency AC power, and the first composite transmission module continues to output DC power to the first power conditioning module. This continues until a power-off command is received from an external terminal device via the communication module. At this point, the second signal control and processing module ceases to supply power to the second composite transmission module. The power supply module sends a power control signal, at which point the stator assembly stops supplying power to the rotor assembly, and the rotor assembly stops working. After the torque sensor is powered on, it operates periodically under the control of the terminal device. In each working cycle, firstly, the terminal device transmits a preset control signal to the second signal control and processing module through the communication module. The second signal control and processing module generates a high-frequency AC output representing the control signal. The second high-frequency resonant network amplifies this high-frequency AC and injects it into the second series circuit through the electromagnetic coupling of the second primary coil and the second secondary coil. Subsequently, the second signal control and processing module disables its signal transmission function and enables its signal reception function. Because the second composite transmission module maintains the generation of low-frequency AC... Electricity is injected into the second series circuit. The high-frequency AC injected into the second series circuit is superimposed with the existing low-frequency AC, forming a low-to-high-frequency mixed AC that is then applied to the second coil, generating a low-to-high-frequency mixed AC. Due to magnetoelectric coupling with the second coil, the first coil also generates a low-to-high-frequency mixed AC that is injected into the first series circuit. The first low-frequency resonant network converts the low-frequency AC in this mixed AC into DC, which is then output to the first power conditioning module through the first composite transmission module. Simultaneously, this low-to-high-frequency mixed AC is applied to the first primary coil. The first high-frequency resonant network, through the coupling between the first primary coil and the first secondary coil, senses the low-to-high-frequency mixed AC and applies it to the low-to-high frequency... The alternating current (AC) is frequency-selected to filter out interference from low-frequency AC, and the high-frequency AC is amplified and output to the first signal control and processing module. The first signal control and processing module, now in signal reception mode, converts the high-frequency AC into a control signal and controls the torque acquisition module to sample the signal. It then disables signal reception and enables signal transmission. Next, the torque acquisition module, under the control of the control signal, acquires external torque signals and generates a digital signal representing the torque, which is transmitted to the first signal control and processing module. The first signal control and processing module converts the digital signal representing the torque into a high-frequency AC output representing the torque, then disables signal transmission and enables signal reception.After the high-frequency AC output from the first signal control and processing module is amplified by the first high-frequency resonant network, the amplified high-frequency AC is injected into the first series circuit through electromagnetic coupling between the first primary coil and the first secondary coil. At this time, the high-frequency AC is loaded onto the first coil, and the low-frequency AC generated by the first coil is coupled and superimposed with the high-frequency AC. Due to the magnetoelectric coupling between the second coil and the first coil, the second coil should induce the high-frequency AC and also generate high-frequency AC, which is injected into the second series circuit. In the second series circuit, the high-frequency AC is superimposed with the existing low-frequency AC to form a low-high frequency mixed AC, which is loaded onto the second secondary coil. The second high-frequency resonant network senses the low-high frequency mixed AC through electromagnetic coupling between the second primary coil and the second secondary coil, selects the frequency of the low-high frequency mixed AC, amplifies the high-frequency AC, and outputs it to the second signal control and processing module. The second signal control and processing module converts the high-frequency AC power into a digital signal representing the torque signal and outputs it to the communication module. Then, it disables the signal receiving function and enables the signal sending function. At this point, the torque sensor completes one working cycle and awaits the next control signal. In this invention, since both the first and second transformers are standard components, both the first transformer and the first composite transmission module can be integrated into the rotor assembly, and both the second transformer and the second composite transmission module can be integrated into the stator assembly. Therefore, this invention can simultaneously achieve power transmission and signal (control signal or torque signal) transmission using only one pair of independent coils, the first coil and the second coil. In practical applications, only an additional pair of non-standard coils needs to be purchased and assembled, greatly reducing assembly difficulty and cost. Furthermore, it eliminates interference problems caused by using two pairs of coils from the source, resulting in high long-term operational reliability.

[0010] Furthermore, the second composite transmission module has a power supply terminal, a first input / output terminal, a second input / output terminal, a first input terminal, and a second input terminal; the power supply terminal of the second composite transmission module is connected to the second power conditioning module, the first input / output terminal is connected to one end of the second secondary coil, the second input / output terminal is connected to the other end of the second coil, the first input terminal is connected to the second signal control and processing module to receive a first digital signal, and the second input terminal is connected to the second signal control and processing module to receive a second digital signal; the frequencies of the first digital signal and the second digital signal switch between two preset frequencies according to a preset period, and the two remain logically opposite and have the same frequency, so as to drive the second composite transmission module to generate a low-frequency AC output between its first input / output terminal and its second input / output terminal; the second composite transmission module includes a first field-effect transistor, a second field-effect transistor, a third field-effect transistor, and a fourth field-effect transistor. The second field-effect transistor (FET) and the first capacitor are connected; the source of the second FET and the source of the fourth FET are connected, and their connection ends are the power supply terminals of the second composite transmission module; the drain of the second FET and the source of the first FET are connected, and their connection ends are the first input / output terminals of the second composite transmission module; the drains of the first FET and the third FET are both grounded; the source of the third FET, the drain of the fourth FET, and one end of the first capacitor are connected; the other end of the first capacitor is the second input / output terminal of the second composite transmission module; the first capacitor can form a low-frequency resonant network with the second coil; the gate of the first FET and the gate of the fourth FET are connected, and their connection ends are the first input terminals of the second composite transmission module; the gate of the second FET and the gate of the third FET are connected, and their connection ends are the second input terminals of the second composite transmission module.

[0011] Furthermore, the first composite transmission module has a first AC input / output terminal, a second AC input / output terminal, and an output terminal; the first AC input / output terminal of the first composite transmission module is connected to one end of the first primary coil, the second AC input / output terminal is connected to the other end of the first coil, and the output terminal is connected to the first power conditioning module; the first composite transmission module includes a second capacitor, a third capacitor, a first diode, a second diode, a third diode, and a fourth diode; the third capacitor is a filter capacitor; the second capacitor and the first coil form a low-frequency resonant network; the anode of the first diode is connected to the cathode of the third diode, and its connection end is the first AC input / output terminal of the first composite transmission module; the anode of the second diode, the cathode of the fourth diode, and one end of the second capacitor are connected; the other end of the second capacitor is the second AC input / output terminal of the first composite transmission module; the cathodes of the first diode, the cathodes of the second diode, and one end of the third capacitor are connected, and their connection end is the output terminal of the first composite transmission module; the anodes of the third diode, the anodes of the fourth diode, and the other end of the third capacitor are all grounded.

[0012] Furthermore, the first signal control and processing module includes a torque signal transmitting module, a control signal receiving module, a first signal demodulation module, and a first controller; the torque signal transmitting module has a power supply terminal, an output terminal, a first input terminal, and a second input terminal; the control signal receiving module has a first output terminal, a second output terminal, a first input terminal, and a second input terminal; the first signal demodulation module has a power supply terminal, a first input terminal, a second input terminal, and an output terminal; the first controller has a power supply terminal, a first output terminal, a second output terminal, a third output terminal, an input terminal, and a communication terminal; the power supply terminals of the torque signal transmitting module, the first signal demodulation module, and the first controller are respectively connected to the first power supply... The modules are connected as follows: the output terminal of the torque signal transmitting module is connected to one end of the first primary coil, the first input terminal is connected to the second output terminal of the first controller, and the second input terminal is connected to the third output terminal of the first controller; the first input terminal of the control signal receiving module is connected to one end of the second primary coil, the second input terminal is connected to the first output terminal of the first controller, the first output terminal is connected to the first input terminal of the first signal demodulation module, and the second output terminal is connected to the second input terminal of the first signal demodulation module; the output terminal of the first signal demodulation module is connected to the input terminal of the first controller; the communication terminal of the first controller is connected to the torque acquisition module for output... The first controller receives a control signal from the torque acquisition module and a digital signal representing the torque signal output by the torque acquisition module. The first controller can acquire the digital signal representing the torque signal received at its communication terminal and generate corresponding third and fourth digital signals, which are output to the torque signal transmitting module through its second and third output terminals, respectively. It can also output a high or low level signal to the control signal receiving module through its first output terminal, causing the control signal receiving module to turn on or off. When the control signal receiving module is on, the first controller does not output the third and fourth digital signals to the torque signal transmitting module; when the control signal receiving module is off, the first controller does not output the third and fourth digital signals to the torque signal transmitting module. A controller outputs a third digital signal and a fourth digital signal to the torque signal transmitting module. At this time, the torque signal transmitting module and the first primary coil form the first high-frequency resonant network. The first high-frequency resonant network selects the frequency of the low-frequency mixed AC power output by the first primary coil, suppresses the low-frequency AC power, and amplifies the high-frequency AC power. The high-frequency AC power is transmitted to the first signal demodulation module through the first and second output terminals of the control signal receiving module. The control signal receiving module does not work when it is turned off. The torque signal transmitting module is used to generate a high-frequency AC power representing the torque signal and apply it to the first primary coil under the drive of the third digital signal and the fourth digital signal.The first signal demodulation module demodulates the high-frequency AC power input to its first and second input terminals to obtain a digital signal as a control signal, which is then transmitted to the first controller via its output terminal. The first controller controls the torque acquisition module to acquire the torque based on this control signal.

[0013] Furthermore, the second signal control and processing module includes a torque signal receiving module, a control signal transmitting module, a second signal demodulation module, and a second controller; the torque signal receiving module has a first output terminal, a second output terminal, a first input terminal, and a second input terminal; the control signal transmitting module has a power supply terminal, an output terminal, a first input terminal, and a second input terminal; the second signal demodulation module has a power supply terminal, a first input terminal, a second input terminal, and an output terminal; the second controller has a power supply terminal, a first output terminal, a second output terminal, a third output terminal, a fourth output terminal, a fifth output terminal, an input terminal, and a communication terminal; the control signal transmitting module, the second signal demodulation module, and the second controller... The power supply terminals of the controller are respectively connected to the second power conditioning module; the output terminal of the control signal transmitting module and the first input terminal of the torque signal receiving module are respectively connected to one end of the second primary coil; the first input terminal of the control signal transmitting module is connected to the second output terminal of the second controller, and the second input terminal is connected to the third output terminal of the second controller; the first output terminal of the torque signal receiving module is connected to the first input terminal of the second signal demodulation module, the second output terminal is connected to the second input terminal of the second signal demodulation module, and the second input terminal is connected to the first output terminal of the second controller; the output terminal of the second signal demodulation module is connected to the second controller's... The input terminals are connected; the fourth and fifth output terminals of the second controller are respectively connected to the first and second input / output terminals of the second composite transmission module, for outputting a first digital signal and a second digital signal to the second composite transmission module; the communication terminal of the second controller is connected to the communication module, for receiving power-on commands, control signals, or outputting digital signals representing torque signals; when a power-on command is received, the fourth and fifth output terminals of the second controller output the first and second digital signals respectively; when a control signal is received, the second and third output terminals of the second controller output the fifth and sixth digital signals respectively; the second controller, through its... The first output terminal outputs a high or low level to the torque signal receiving module to control the torque signal receiving module to turn on or off; the torque signal receiving module does not work when it is off; when the torque signal receiving module is on, the second controller does not output the fifth and sixth digital signals to the control signal sending module, and the control signal sending module does not work. At this time, the torque signal receiving module and the second primary coil form the second high-frequency resonant network, which selects the frequency of the low-frequency mixed AC power output by the second secondary coil, suppresses the low-frequency AC power, amplifies the high-frequency AC power, and outputs the high-frequency AC power to the second signal demodulation module at the first and second output terminals of the torque signal receiving module.When the second controller outputs the fifth and sixth digital signals to the control signal transmitting module, the torque signal receiving module is turned off. The control signal transmitting module and the second primary coil form the second high-frequency resonant network. Driven by the fifth and sixth digital signals, the control signal transmitting module generates a high-frequency alternating current characterizing the control signal. This high-frequency alternating current is amplified by the second high-frequency resonant network and then applied to the second primary coil. The second signal demodulation module demodulates the high-frequency alternating current output from the torque signal receiving module, obtaining a digital signal characterizing the torque signal, which is then transmitted to the second controller through its output terminal.

[0014] Furthermore, the torque signal transmitting module includes a fourth capacitor, a fifth field-effect transistor (FET), and a sixth FET; the drain of the fifth FET is the power supply terminal of the torque signal transmitting module; the source of the fifth FET, the drain of the sixth FET, and one end of the fourth capacitor are connected; the other end of the fourth capacitor is the output terminal of the torque signal transmitting module, and the source of the sixth FET is grounded; the gate of the fifth FET is the first input terminal of the torque signal transmitting module; the gate of the sixth FET is the second input terminal of the torque signal transmitting module; the fourth capacitor is used to form a first high-frequency resonant network with the first primary coil.

[0015] Furthermore, the torque signal receiving module includes a fifth capacitor, a seventh field-effect transistor, an eighth field-effect transistor, and a first resistor; the source of the seventh field-effect transistor is the first input terminal of the torque signal receiving module; the drain of the seventh field-effect transistor, one end of the fifth capacitor, and one end of the first resistor are connected, and their connection terminal is the first output terminal of the torque signal receiving module; the source of the eighth field-effect transistor is grounded; the drain of the eighth field-effect transistor, the other end of the fifth capacitor, and the other end of the first resistor are connected, and their connection terminal is the second output terminal of the torque signal receiving module; the gates of the seventh and eighth field-effect transistors are connected, and their connection terminal is the second input terminal of the torque signal receiving module; the fifth capacitor is used to form a second high-frequency resonant network with the second primary coil when the torque signal receiving module is turned on.

[0016] Furthermore, the control signal transmitting module includes a sixth capacitor, a ninth field-effect transistor (FET), and a tenth FET; the drain of the ninth FET is the power supply terminal of the control signal transmitting module; the source of the ninth FET, the drain of the tenth FET, and one end of the sixth capacitor are connected; the other end of the sixth capacitor is the output terminal of the control signal transmitting module, and the source of the tenth FET is grounded; the gate of the ninth FET is the first input terminal of the control signal transmitting module; the gate of the tenth FET is the second input terminal of the control signal transmitting module; the sixth capacitor and the second primary coil constitute a second high-frequency resonant network.

[0017] Furthermore, the control signal receiving module includes a seventh capacitor, an eleventh field-effect transistor (FET), a twelfth field-effect transistor (FET), and a second resistor. The source of the eleventh FET is the first input terminal of the control signal receiving module. The drain of the eleventh FET is connected to one end of the seventh capacitor and one end of the second resistor, and their connection point is the first output terminal of the control signal receiving module. The source of the twelfth FET is grounded. The drain of the twelfth FET is connected to the other end of the seventh capacitor and the other end of the second resistor, and their connection point is the second output terminal of the control signal receiving module. The gates of the eleventh FET and the twelfth FET are connected, and their connection point is the second input terminal of the control signal receiving module. When the control signal receiving module is turned on, the seventh capacitor and the first primary coil form a first high-frequency resonant network.

[0018] Furthermore, the first signal demodulation module includes a second differential amplifier circuit, a bandpass filter circuit, an envelope detector circuit, a low-pass filter circuit, and a hysteresis comparator circuit; the second differential amplifier circuit has a power supply terminal, a first input terminal, a second input terminal, and an output terminal; the bandpass filter circuit has a power supply terminal, an input terminal, and an output terminal; the envelope detector circuit has a power supply terminal, an input terminal, and an output terminal; the low-pass filter circuit has a power supply terminal, an input terminal, and an output terminal; the power supply terminals of the second differential amplifier circuit, the bandpass filter circuit, the envelope detector circuit, the low-pass filter circuit, and the hysteresis comparator circuit are respectively connected to the first power conditioning module and connected to its operating voltage; the hysteresis comparator circuit has an electrical... The system comprises a source terminal, a first input terminal, a second input terminal, and an output terminal; the first and second input terminals of the second differential amplifier circuit are the first and second input terminals of the control signal receiving module; the output terminal of the second differential amplifier circuit is connected to the input terminal of the bandpass filter circuit, the output terminal of the bandpass filter circuit is connected to the input terminal of the envelope detector circuit, the output terminal of the envelope detector circuit is connected to the input terminal of the low-pass filter circuit, the output terminal of the low-pass filter circuit is connected to the first input terminal of the hysteresis comparator circuit, and the second input terminal of the hysteresis comparator circuit is connected to a standard voltage; the second signal demodulation module has the same structure as the first signal demodulation module.

[0019] Furthermore, the torque acquisition module includes a bridge circuit, a differential amplifier circuit, and an ADC analog-to-digital converter circuit. The bridge circuit has a power supply terminal, an input terminal, a first output terminal, and a second output terminal. The first differential amplifier circuit has a power supply terminal, a first input terminal, a second input terminal, and an output terminal. The ADC analog-to-digital converter circuit has a power supply terminal, an input terminal, and an input / output terminal. The power supply terminals of the bridge circuit, the first differential amplifier circuit, and the ADC analog-to-digital converter circuit are respectively connected to the first power conditioning module and connected to its operating voltage. The input terminal of the bridge circuit is used to acquire torque signals. The first and second output terminals of the bridge circuit are respectively connected to the first and second input terminals of the first differential amplifier circuit. The first output terminal of the first differential amplifier circuit is connected to the first input terminal of the ADC analog-to-digital converter circuit, and the input / output terminals of the ADC analog-to-digital converter circuit are connected to the communication terminal of the first controller. Attached Figure Description

[0020] Figure 1 This is a structural diagram of an existing strain gauge torque sensor; Figure 2 The structure of the single-coil magnetically coupled wireless power supply and signal synchronous transmission torque sensor of the present invention Figure 1 ; Figure 3 The structure of the single-coil magnetically coupled wireless power supply and signal synchronous transmission torque sensor of the present invention Figure 2 ; Figure 4 This is a circuit diagram of the second composite transmission module of the single-coil magnetic coupling wireless power supply and signal synchronous transmission torque sensor of the present invention. Figure 5 This is a circuit diagram of the first composite transmission module of the present invention; Figure 6 This is a circuit diagram of the torque signal transmission module of the present invention; Figure 7 This is a circuit diagram of the torque signal receiving module of the present invention; Figure 8 This is a circuit diagram of the control signal transmission module of the present invention; Figure 9 This is a circuit diagram of the control signal receiving module of the present invention; Figure 10 This is a circuit diagram of the first signal demodulation module or the second signal demodulation module of the present invention; Figure 11 This is a simulation diagram of the control signal transmission waveform of the present invention; Figure 12 This is a simulation diagram of the torque signal transmission waveform of the present invention. Detailed Implementation

[0021] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0022] Example 1: As Figure 2As shown, a single-coil magnetically coupled wireless power supply and signal synchronous transmission torque sensor includes a rotor assembly and a stator assembly. The rotor assembly includes a torque acquisition module, a first signal control and processing module, a first power conditioning module, and a first coil. The torque acquisition module is connected to the first signal control and processing module, and the first power conditioning module is connected to both the torque acquisition module and the first signal control and processing module. The stator assembly includes a second signal control and processing module, a second power conditioning module, a communication module, and a second coil. The second signal control and processing module is connected to the communication module, and the second power conditioning module is connected to the second signal control and processing module. The first coil and the second coil can generate corresponding alternating current through electromagnetic coupling. The rotor assembly further includes a first transformer and a first composite transmission module; the first transformer has a primary coil and a secondary coil, the primary coil being referred to as the first primary coil and the secondary coil as the first secondary coil; one end of the first primary coil is connected to the first signal control and processing module, and the other end is grounded; one end of the first secondary coil is connected to the first composite transmission module, and the other end is connected to one end of the first coil; the other end of the first coil is connected to the first composite transmission module, and the first composite transmission module is connected to the first power conditioning module; the first composite transmission module, the first secondary coil, and the first coil constitute a first series circuit; the first primary coil and the first signal control and processing module constitute a first high-frequency resonant network; the first high-frequency resonant network... The network is used to amplify the high-frequency AC output from the first signal control and processing module and inject it into the first series circuit, and to select the frequency of the low-frequency mixed AC in the first series circuit, amplifying the high-frequency AC and outputting it to the first signal control and processing module; when the first coil and the second coil electromagnetically couple to generate low-frequency AC and inject it into the first series circuit, the first composite transmission module will receive the low-frequency AC; when the first high-frequency resonant network injects high-frequency AC into the first series circuit, the high-frequency AC will be superimposed with the low-frequency AC already injected in the first series circuit to form a low-frequency mixed AC, causing the first coil to generate a low-frequency mixed AC; when the first coil generates high-frequency AC due to electromagnetic coupling with the second coil... When AC current is injected into the first series circuit, it superimposed with the low-frequency AC current already injected in the first series circuit to form a low-to-high-frequency mixed AC current loaded onto the first primary coil. The first composite transmission module and the first coil form a low-frequency resonant network, converting the low-frequency AC current in the first series circuit into DC current for output to the first power conditioning module. The stator assembly also includes a second transformer and a second composite transmission module. The second transformer has a primary coil and a secondary coil, with its primary coil referred to as the second primary coil and its secondary coil referred to as the second secondary coil. One end of the second primary coil is connected to the second signal control and processing module, and the other end is grounded. One end of the second secondary coil is connected to the second composite transmission module, and the other end is connected to one end of the second coil.The other end of the second coil is connected to the second composite transmission module, which is connected to the second power conditioning module. The second coil, the second primary coil, and the second composite transmission module constitute a second series circuit. The second primary coil and the second signal control and processing module constitute a second high-frequency resonant network. The second high-frequency resonant network is used to amplify the high-frequency AC output from the second signal control and processing module and inject it into the second series circuit, as well as to select the frequency of the low-frequency mixed AC generated in the second series circuit and amplify it before outputting it to the second signal control and processing module. The second composite transmission module and the second coil form a low-frequency resonant network. When the second composite transmission module generates low-frequency AC and injects it into the second series circuit, it will cause the second coil to generate low-frequency AC. When the second high-frequency resonant network injects high-frequency AC into the second series circuit, this high-frequency AC will be superimposed with the low-frequency AC already injected into the second series circuit, causing the second coil to generate a low-frequency mixed AC. When the second coil generates a low-frequency mixed AC due to electromagnetic coupling with the first coil and injects it into the second series circuit, this low-frequency mixed AC is loaded onto the second primary coil.

[0023] In this embodiment, when the terminal device sends a power-on command to the second signal control and processing module via the communication module, the second signal control and processing module outputs a power supply control signal to control the second composite transmission module to generate low-frequency alternating current. At this time, the low-frequency alternating current is injected into the second series circuit and loaded onto the second coil, causing the second coil to generate low-frequency alternating current. The first coil, due to electromagnetic coupling with the second coil, generates low-frequency alternating current which is injected into the first series circuit. This low-frequency alternating current is then loaded onto the first composite transmission module, which converts it into direct current and transmits it to the first power conditioning module. The first power conditioning module then converts the direct current into power for the first signal control and processing module and the torque acquisition module. The system requires a working voltage output to power the torque acquisition module and the first signal control and processing module, thus powering on the torque sensor. Afterward, the second signal control and processing module continuously sends power control signals to the second composite transmission module. This means the second composite transmission module continues to generate low-frequency AC power, injecting it into the second series circuit. The second coil continues to generate low-frequency AC power, as does the first coil. The first composite transmission module continues to output DC power to the first power conditioning module until it receives a shutdown command from an external terminal device via the communication module. At this point, the second signal control and processing module stops sending power control signals to the second composite transmission module. The stator assembly then stops supplying power to the rotor assembly, and the rotor assembly ceases operation. After the torque sensor is powered on, it operates periodically under the control of the terminal device. In each operating cycle, the terminal device first transmits a preset control signal to the second signal control and processing module via the communication module. The second signal control and processing module generates a high-frequency AC output representing the control signal. The second high-frequency resonant network amplifies this high-frequency AC and injects it into the second series circuit through the electromagnetic coupling of the second primary coil and the second secondary coil. Subsequently, the second signal control and processing module disables its signal transmission function and enables its signal reception function. Meanwhile, the second composite transmission module continues to generate low-frequency AC and injects it into the second series circuit. At this time, the high-frequency AC injected into the second series circuit is superimposed on the existing low-frequency AC. A low-to-high frequency mixed AC current is generated and applied to the second coil, generating a low-to-high frequency mixed AC current. Due to the magnetoelectric coupling between the first coil and the second coil, a low-to-high frequency mixed AC current is also generated and injected into the first series circuit. The first low-frequency resonant network converts the low-frequency AC current in the low-to-high frequency mixed AC current into DC current, which is then output to the first power conditioning module through the first composite transmission module. At the same time, the low-to-high frequency mixed AC current is applied to the first primary coil. The first high-frequency resonant network senses the low-to-high frequency mixed AC current through the coupling between the first primary coil and the first secondary coil, selects the frequency of the low-to-high frequency AC current, filters out the interference of the low-frequency AC current, and amplifies the high-frequency AC current before outputting it to the first signal control and processing module.The first signal control and processing module has now activated its signal receiving function, converting the high-frequency AC power into a control signal. Based on this control signal, it controls the torque acquisition module to sample the signal, then disables the signal receiving function and activates the signal transmitting function. Next, the torque acquisition module, under the control of the control signal, acquires the external torque signal and generates a digital signal representing the torque signal, which is then transmitted to the first signal control and processing module. The first signal control and processing module converts the digital signal representing the torque signal into a high-frequency AC power output representing the torque signal, then disables the signal transmitting function and activates the signal receiving function. The first high-frequency resonant network amplifies the high-frequency AC power output from the first signal control and processing module, and through electromagnetic coupling between the first primary coil and the first secondary coil, injects the amplified high-frequency AC power into the first series circuit. At this point, the high-frequency AC power is loaded onto the first coil, and the first coil generates… A high-frequency alternating current is coupled and superimposed onto the low-frequency alternating current generated by the first coil. Due to the magnetoelectric coupling between the second coil and the first coil, the second coil should also generate high-frequency alternating current, which is injected into the second series circuit. In the second series circuit, the high-frequency alternating current is superimposed with the existing low-frequency alternating current to form a low-to-high-frequency mixed alternating current, which is then loaded onto the second stage coil. The second high-frequency resonant network senses this low-to-high-frequency mixed alternating current through the electromagnetic coupling between the second primary coil and the second stage coil, selects the frequency of this mixed alternating current, amplifies the high-frequency alternating current, and outputs it to the second signal control and processing module. The second signal control and processing module restores the high-frequency alternating current to a digital signal representing the torque signal and outputs it to the communication module. Then, it turns off the signal receiving function and turns on the signal sending function. At this time, the torque sensor completes one working cycle and waits for the next round of control signals.

[0024] Example 2: This example is basically the same as Example 1, except that: in this example, as Figure 4As shown, the second composite transmission module has a power supply terminal, a first input / output terminal, a second input / output terminal, a first input terminal, and a second input terminal. The power supply terminal of the second composite transmission module is connected to a second power conditioning module. The first input / output terminal is connected to one end of the second stage coil, and the second input / output terminal is connected to the other end of the second coil. The first input terminal is connected to a second signal control and processing module, receiving a first digital signal. The second input terminal is connected to the second signal control and processing module, receiving a second digital signal. The frequencies of the first and second digital signals switch between two preset frequencies according to a preset period, and they maintain logical opposites and the same frequency to drive the second composite transmission module to generate a low-frequency AC output between its first and second input / output terminals. The second composite transmission module includes a first field-effect transistor Q1, a second field-effect transistor Q2, a third field-effect transistor Q3, a fourth field-effect transistor Q4, and... The first capacitor is C1; the source of the second field-effect transistor Q2 and the source of the fourth field-effect transistor Q4 are connected, and their connection ends are the power supply terminals of the second composite transmission module; the drain of the second field-effect transistor Q2 and the source of the first field-effect transistor Q1 are connected, and their connection ends are the first input / output terminals of the second composite transmission module; the drains of the first field-effect transistor Q1 and the third field-effect transistor Q3 are both grounded; the source of the third field-effect transistor Q3, the drain of the fourth field-effect transistor Q4, and one end of the first capacitor C1 are connected; the other end of the first capacitor C1 is the second input / output terminal of the second composite transmission module; the first capacitor C1 can form a low-frequency resonant network with the second coil; the gate of the first field-effect transistor Q1 and the gate of the fourth field-effect transistor Q4 are connected, and their connection ends are the first input terminals of the second composite transmission module; the gate of the second field-effect transistor Q2 and the gate of the third field-effect transistor Q3 are connected, and their connection ends are the second input terminals of the second composite transmission module.

[0025] In this embodiment, after the second power conditioning module is connected to an external power source, it supplies power to the second signal control and processing module and the second composite transmission module, and the second signal control and processing module and the second composite transmission module enter the working state. When the terminal device sends a power-on command to the second signal control and processing module through the communication module, the second signal control and processing module outputs a preset first digital signal and a preset second digital signal to the second composite transmission module. At this time, the second composite transmission module generates a low-frequency AC output that matches the first digital signal and the second digital signal between its first input / output terminal and its second input / output terminal, specifically as follows: Since the logic of the first digital signal and the second digital signal is opposite, the on and off states of the first field-effect transistor Q1 and the fourth field-effect transistor Q4 are opposite to those of the second field-effect transistor Q2 and the third field-effect transistor Q3, switching between the on and off states. When the first field-effect transistor Q1 and the fourth field-effect transistor Q4 are on, the current connected to the power supply terminal of the second composite transmission module flows through the fourth field-effect transistor Q4. The first capacitor C1 and the first field-effect transistor Q1 are connected. At this time, a positive-phase alternating current is generated between the first input / output terminal and the second input / output terminal of the second composite transmission module. When the second field-effect transistor Q2 and the third field-effect transistor Q3 are turned on, the current connected to the power supply terminal of the second composite transmission module flows through the second field-effect transistor Q2, the first capacitor C1 and the third field-effect transistor Q3 respectively. At this time, an anti-phase alternating current is generated between the first input / output terminal and the second input / output terminal of the second composite transmission module. Since the first digital signal and the second digital signal control the first field-effect transistor Q1 and the fourth field-effect transistor Q4 to alternately turn on or off with the second field-effect transistor Q2 and the third field-effect transistor Q3, a low-frequency alternating current is generated between the first input / output terminal and the second input / output terminal of the second composite transmission module and injected into the second series circuit. When the terminal device sends a control signal to the second signal control and processing module through the communication module, the second signal control and processing module converts the control signal into a high-frequency AC output representing the control signal. The second high-frequency resonant network amplifies this high-frequency AC and transmits it to the second-stage coil through the magnetoelectric coupling between the second primary coil and the second-stage coil. At this time, the second-stage coil injects this high-frequency AC into the second series circuit. This high-frequency AC, combined with the low-frequency AC already injected into the second series circuit by the second composite transmission module, forms a low-to-high-frequency mixed AC that is loaded onto the second coil. At this time, the first coil can generate a low-to-high-frequency mixed AC due to the magnetoelectric coupling with the second coil. When the second coil generates a low-to-high-frequency mixed AC due to electromagnetic coupling with the first coil, the second coil injects this low-to-high-frequency mixed AC into the second series circuit. This low-to-high-frequency mixed AC is loaded onto the second-stage coil. The second high-frequency resonant network senses this low-to-high-frequency mixed AC through the electromagnetic coupling between the second primary coil and the second-stage coil, and performs frequency selection on this low-to-high-frequency mixed AC, suppressing the low-frequency AC and amplifying the high-frequency AC within it before transmitting it to the second signal control and processing module.

[0026] Example 3: This example is basically the same as Example 2, except that: in this example, as Figure 5 As shown, the first composite transmission module has a first AC input / output terminal, a second AC input / output terminal, and an output terminal. The first AC input / output terminal of the first composite transmission module is connected to one end of the first primary coil, the second AC input / output terminal is connected to the other end of the first coil, and the output terminal is connected to the first power conditioning module. The first composite transmission module includes a second capacitor C2, a third capacitor C3, a first diode D1, a second diode D2, a third diode D3, and a fourth diode D4. The third capacitor C3 is a filter capacitor. The second capacitor C2 and the first coil form a low-frequency resonant network. The anode of the first diode D1 is connected to the cathode of the third diode D3, and its connection point is the first AC input / output terminal of the first composite transmission module. The anode of the second diode D2, the cathode of the fourth diode D4, and one end of the second capacitor C2 are connected. The other end of the second capacitor C2 is the second AC input / output terminal of the first composite transmission module. The cathodes of the first diode D1, the cathode of the second diode D2, and one end of the third capacitor C3 are connected, and their connection point is the output terminal of the first composite transmission module. The anodes of the third diode D3, the anode of the fourth diode D4, and the other end of the third capacitor C3 are all grounded.

[0027] In this embodiment, when the first coil and the second coil are electromagnetically coupled to generate low-frequency alternating current, the first coil injects this low-frequency alternating current into the first series circuit. This low-frequency alternating current is connected between the first AC input / output terminal and the second AC input / output terminal of the first composite transmission module. At this time, the full-bridge rectifier circuit composed of the first diode D1, the second diode D2, the third diode D3, and the fourth diode D4 converts the low-frequency alternating current into direct current, which is then filtered by the third capacitor C3 and output at its output terminal. When the first signal control and processing module outputs high-frequency alternating current, the first high-frequency resonant network amplifies this high-frequency alternating current and loads it onto the first primary coil through electromagnetic coupling with the first secondary coil, injecting the high-frequency alternating current into the first series circuit. At this time, the high-frequency alternating current is superimposed with the low-frequency alternating current previously injected into the first coil, forming a low-to-high-frequency mixed alternating current loaded onto the first coil. Subsequently, the second coil, due to electromagnetic coupling with the first coil, generates a low-to-high-frequency mixed alternating current. When the first coil generates a low-to-high frequency mixed AC current due to electromagnetic coupling with the second coil, the first coil injects this low-to-high frequency mixed AC current into the first series circuit and loads it onto the first primary coil. The first high-frequency resonant network senses this low-to-high frequency mixed AC current through the electromagnetic coupling between the first primary coil and the first secondary coil, performs frequency selection, suppresses the low-frequency AC current, amplifies the high-frequency AC current, and transmits it to the first signal control and processing module.

[0028] Example 4: This example is basically the same as Example 3, except that: in this example, as Figure 3 As shown, the first signal control and processing module includes a torque signal transmitting module, a control signal receiving module, a first signal demodulation module, and a first controller. The torque signal transmitting module has a power supply terminal, an output terminal, a first input terminal, and a second input terminal. The control signal receiving module has a first output terminal, a second output terminal, a first input terminal, and a second input terminal. The first signal demodulation module has a power supply terminal, a first input terminal, a second input terminal, and an output terminal. The first controller has a power supply terminal, a first output terminal, a second output terminal, a third output terminal, an input terminal, and a communication terminal. The power supply terminals of the torque signal transmitting module, the first signal demodulation module, and the first controller are respectively connected to the first power conditioning module. The output terminal of the torque signal transmitting module is connected to the first primary... One end of the coil is connected to the first input terminal, which is connected to the second output terminal of the first controller, and the second input terminal is connected to the third output terminal of the first controller. The first input terminal of the control signal receiving module is connected to one end of the second primary coil, and the second input terminal is connected to the first output terminal of the first controller. The first output terminal is connected to the first input terminal of the first signal demodulation module, and the second output terminal is connected to the second input terminal of the first signal demodulation module. The output terminal of the first signal demodulation module is connected to the input terminal of the first controller. The communication terminal of the first controller is connected to the torque acquisition module, used to output control signals to the torque acquisition module and receive digital signals representing torque signals output by the torque acquisition module. The first controller can acquire its communication signals. The first controller receives the digital signal representing the torque signal and generates corresponding third and fourth digital signals, which are output to the torque signal transmitting module through its second and third output terminals, respectively. It can also output a high or low level signal to the control signal receiving module through its first output terminal, thus turning the control signal receiving module on or off. When the control signal receiving module is on, the first controller does not output the third and fourth digital signals to the torque signal transmitting module. When the control signal receiving module is off, the first controller outputs the third and fourth digital signals to the torque signal transmitting module. In this case, the torque signal transmitting module and the first primary coil form a first high-frequency resonant network. This first high-frequency resonant network is used for the first primary coil. The low-frequency mixed AC output from the coil is frequency-selected, suppressing the low-frequency AC and amplifying the high-frequency AC. The high-frequency AC is then transmitted to the first signal demodulation module through the first and second output terminals of the control signal receiving module. The control signal receiving module is inactive when it is off. The torque signal transmitting module generates a high-frequency AC representing the torque signal, which is then applied to the first primary coil under the drive of the third and fourth digital signals. The first signal demodulation module demodulates the high-frequency AC input to its first and second input terminals to obtain a digital signal as a control signal, which is then transmitted to the first controller through its output terminal. The first controller controls the torque acquisition module to acquire the torque based on this control signal.

[0029] In this embodiment, the second signal control and processing module includes a torque signal receiving module, a control signal transmitting module, a second signal demodulation module, and a second controller. The torque signal receiving module has a first output terminal, a second output terminal, a first input terminal, and a second input terminal. The control signal transmitting module has a power supply terminal, an output terminal, a first input terminal, and a second input terminal. The second signal demodulation module has a power supply terminal, a first input terminal, a second input terminal, and an output terminal U2-CDR. The second controller has a power supply terminal, a first output terminal, a second output terminal, a third output terminal, a fourth output terminal, a fifth output terminal, an input terminal, and a communication terminal. The power supply terminals of the control signal transmitting module, the second signal demodulation module, and the second controller are respectively connected to the second power supply module. The control signal transmitting module is connected to the output terminal of the control signal transmitting module and the first input terminal of the torque signal receiving module, respectively, and one end of the second primary coil is connected to each of them. The first input terminal of the control signal transmitting module is connected to the second output terminal of the second controller, and the second input terminal is connected to the third output terminal of the second controller. The first output terminal of the torque signal receiving module is connected to the first input terminal of the second signal demodulation module, and the second output terminal is connected to the second input terminal of the second signal demodulation module. The second input terminal is connected to the first output terminal of the second controller. The output terminal U2-CDR of the second signal demodulation module is connected to the input terminal of the second controller. The fourth and fifth output terminals of the second controller are respectively connected to the first input terminal of the second composite transmission module. The output terminal is connected to the second input / output terminal, used to output the first digital signal and the second digital signal to the second composite transmission module; the communication terminal of the second controller is connected to the communication module, used to receive power-on commands, control signals, or output digital signals representing torque signals; when a power-on command is received, the fourth and fifth output terminals of the second controller output the first digital signal and the second digital signal respectively; when a control signal is received, the second and third output terminals of the second controller output the fifth digital signal and the sixth digital signal respectively; the second controller outputs a high or low level to the torque signal receiving module through its first output terminal, controlling the torque signal receiving module to turn on or off; the torque signal receiving module does not work when it is off. When the torque signal receiving module is turned on, the second controller does not output the fifth and sixth digital signals to the control signal sending module, and the control signal sending module is not working. At this time, the torque signal receiving module and the second primary coil form a second high-frequency resonant network, which selects the frequency of the low-frequency mixed AC power output by the second secondary coil, suppresses the low-frequency AC power, and amplifies the high-frequency AC power before outputting the high-frequency AC power to the second signal demodulation module at the first and second output terminals of the torque signal receiving module. When the second controller outputs the fifth and sixth digital signals to the control signal sending module, the torque signal receiving module is turned off, and the control signal sending module and the second primary coil form a second high-frequency resonant network.Driven by the fifth and sixth digital signals, the control signal transmitting module generates a high-frequency alternating current (AC) representing the control signal. This AC is amplified by the second high-frequency resonant network and then applied to the second primary coil. The second signal demodulation module demodulates the AC output from the torque signal receiving module, obtaining a digital signal representing the torque signal, which is then transmitted to the second controller through its output.

[0030] In this embodiment, when the torque sensor is working, the second power conditioning module converts the DC power supplied by the external power supply into the operating voltage required by the control signal sending module, the second signal demodulation module, and the second controller, thus supplying power to the power terminals of the control signal sending module, the second signal demodulation module, and the second controller. When the communication module receives the power-on command sent by the terminal device and outputs it to the second controller, the second controller outputs the first digital signal through its fourth output terminal and the second digital signal through its fifth output terminal, causing the second composite transmission module to generate low-frequency AC power output for power supply. When the terminal device transmits a preset control signal (digital signal) to the second controller via the communication module, the second controller outputs a low level through its first output terminal, shutting down the torque signal receiving module and converting the preset control signal into a fifth and sixth digital signal representing the control signal, which is then output to the control signal sending module. The control signal sending module generates a high-frequency alternating current representing the control signal based on the fifth and sixth digital signals and outputs it through its output terminal. At this time, the control signal sending module and the second primary coil form a second high-frequency resonant network. After the second high-frequency resonant network amplifies the high-frequency alternating current, it injects the high-frequency alternating current into the second series circuit through the magnetoelectric coupling between the second primary coil and the second secondary coil. After the control signal transmission is completed, the second controller no longer outputs the fifth and sixth digital signals to the control signal sending module, and the control signal sending module does not work. Instead, it outputs a high level to the torque signal receiving module, turning on the torque signal receiving module and waiting for the low- and high-frequency mixed alternating current from the second secondary coil. When a low-to-high frequency mixed AC current is generated on the secondary coil, the activated torque signal receiving module and the secondary primary coil form a first high-frequency resonant network. The first high-frequency resonant network induces the low-to-high frequency mixed AC current through the magnetoelectric coupling between the secondary primary coil and the secondary coil, and selects the frequency of the mixed AC current, suppressing the low-frequency AC current and amplifying the high-frequency AC current. The amplified AC current is then transmitted to the second signal demodulation module through the first and second output terminals of the torque signal receiving module. The second signal demodulation module demodulates the input high-frequency AC current and obtains a digital signal representing the torque signal, which is transmitted to the second controller through its output terminal. The second controller transmits the digital signal representing the torque signal to the communication module through its communication terminal. At this time, the first output terminal of the second controller outputs a low level again to turn off the torque signal receiving module, waiting for the next cycle to start.

[0031] Example 5: This example is basically the same as Example 4, except that: in this example, as Figure 6 As shown, the torque signal transmission module includes a fourth capacitor C4, a fifth field-effect transistor Q5, and a sixth field-effect transistor Q6; the drain of the fifth field-effect transistor Q5 is the power supply terminal of the torque signal transmission module; the source of the fifth field-effect transistor Q5, the drain of the sixth field-effect transistor Q6, and one end of the fourth capacitor C4 are connected; the other end of the fourth capacitor C4 is the output terminal of the torque signal transmission module, and the source of the sixth field-effect transistor Q6 is grounded; the gate of the fifth field-effect transistor Q5 is the first input terminal of the torque signal transmission module; the gate of the sixth field-effect transistor Q6 is the second input terminal of the torque signal transmission module; the fourth capacitor C4 is used to form a first high-frequency resonant network with the first primary coil.

[0032] In this embodiment, the third digital signal connected to the first input terminal and the fourth digital signal connected to the second input terminal of the torque signal transmitting module are data transmission drive digital signals representing the torque signal. The torque signal is multi-bit binary data. The data transmission period of one bit of the torque signal is preset to N. The data transmission period N is usually set to 1 / 10 of the cycle of the low-frequency AC power used for power supply. The data transmission period of the third and fourth digital signals is also set to N. If a bit of the torque signal is 1, within one data transmission period, the third and fourth digital signals maintain opposite logic levels and both have a frequency of F1 (the reciprocal of N). By switching the logic levels of the third and fourth digital signals, the output terminal of the torque signal transmitting module is driven to generate multiple high-frequency AC currents with a data transmission period of N in sequence, thereby representing that bit of the torque signal is 1. If a bit of the torque signal is 0, within one data transmission period, the third digital signal remains at a low level and the fourth digital signal remains at a high level, thereby generating a low-level signal for one data transmission period at the output terminal of the torque signal transmitting module, thereby representing that bit of the torque signal is 0.

[0033] In this embodiment, when a certain data bit of the output torque signal is 1, the on and off states of the fifth field-effect transistor Q5 and the sixth field-effect transistor Q6 are opposite, switching between on and off states; when a certain data bit of the output torque signal is 0, the fifth field-effect transistor Q5 remains off and the sixth field-effect transistor Q6 remains on. After the torque signal transmitting module is connected to the operating voltage, when the gate of the fifth field-effect transistor Q5 is connected to the third digital signal and the gate of the sixth field-effect transistor Q6 is connected to the fourth digital signal, if the third digital signal is high and the fourth digital signal is low, then the fifth field-effect transistor Q5 is on and the sixth field-effect transistor Q6 is off. At this time, the current connected to the power supply terminal of the torque signal transmitting module flows through the drain of the fifth field-effect transistor Q5 and the fourth capacitor C4, respectively, and the output terminal of the torque signal transmitting module generates a high level; if the third digital signal is low and the fourth digital signal is high, then the fifth field-effect transistor... When Q5 is off and the sixth field-effect transistor Q6 is on, the fourth capacitor C4 releases its charge, which flows into the drain of the sixth field-effect transistor Q6 and out to ground through the source of the sixth field-effect transistor Q6. At this time, the output terminal of the torque signal transmitting module outputs a low level. Thus, the fifth field-effect transistor Q5 and the fourth and sixth field-effect transistors are turned on or off by the third and fourth digital signals, so that the output terminal of the torque signal transmitting module generates a high-frequency alternating current characterizing the torque signal. Then, through the second high-frequency resonant network composed of the fourth capacitor C4 and the first primary coil, the high-frequency alternating current is amplified and transmitted to the first primary coil.

[0034] Example 6: This example is basically the same as Example 5, except that: in this example, as Figure 7 As shown, the torque signal receiving module includes a fifth capacitor C5, a seventh field-effect transistor Q7, an eighth field-effect transistor Q8, and a first resistor R1. The source of the seventh field-effect transistor is the first input terminal of the torque signal receiving module. The drain of the seventh field-effect transistor, one end of the fifth capacitor C5, and one end of the first resistor R1 are connected, and their connection point is the first output terminal of the torque signal receiving module. The source of the eighth field-effect transistor Q8 is grounded. The drain of the eighth field-effect transistor, the other end of the fifth capacitor C5, and the other end of the first resistor R1 are connected, and their connection point is the second output terminal of the torque signal receiving module. The gate of the seventh field-effect transistor Q7 and the gate of the eighth field-effect transistor Q8 are connected, and their connection point is the second input terminal of the torque signal receiving module. The fifth capacitor C5 is used to form a second high-frequency resonant network with the second primary coil when the torque signal receiving module is turned on.

[0035] In this embodiment, when the second input terminal of the torque signal receiving module is connected to a high level, both the seventh field-effect transistor Q7 and the eighth field-effect transistor Q8 are turned on. At this time, the low-to-high frequency mixed AC current generated by the magnetoelectric coupling between the second stage coil and the second primary coil flows through the source of the seventh field-effect transistor Q7, then through the drain of the seventh field-effect transistor Q7 and the fifth capacitor C5, and then flows into the drain of the eighth field-effect transistor Q8 and out to ground through its source. Due to the second high-frequency resonant network formed by the fifth capacitor C5 and the second primary coil, the second high-frequency resonant network selects the frequency of the low-to-high frequency mixed AC current, suppresses the low-frequency AC current within it, and amplifies the high-frequency AC current representing the torque signal. A high-level AC current is output between the first and second output terminals of the torque signal receiving module, thereby transmitting the high-frequency AC current representing the torque signal to the second signal demodulation module through the first and second output terminals of the torque signal receiving module. When the second input terminal of the torque signal receiving module is connected to a low level, both the seventh field-effect transistor Q7 and the eighth field-effect transistor Q8 are turned off. At this time, the low-frequency mixed AC power generated by the magneto-electric coupling between the second primary coil and the second secondary coil cannot enter from the first input terminal of the torque signal receiving module.

[0036] Example 7: This example is basically the same as Example 6, except that: in this example, as Figure 7 As shown, the control signal transmission module includes a sixth capacitor C6, a ninth field-effect transistor Q9, and a tenth field-effect transistor Q10; the drain of the ninth field-effect transistor Q9 is the power supply terminal of the control signal transmission module; the source of the ninth field-effect transistor Q9, the drain of the tenth field-effect transistor Q10, and one end of the sixth capacitor C6 are connected; the other end of the sixth capacitor C6 is the output terminal of the control signal transmission module, and the source of the tenth field-effect transistor Q10 is grounded; the gate of the ninth field-effect transistor Q9 is the first input terminal of the control signal transmission module; the gate of the tenth field-effect transistor Q10 is the second input terminal of the control signal transmission module; the sixth capacitor C6 and the second primary coil form a second high-frequency resonant network.

[0037] In this embodiment, the fifth digital signal connected to the first input terminal and the sixth digital signal connected to the second input terminal of the control signal transmitting module are data transmission drive digital signals representing the control signal. The control signal is multi-bit binary data. The data transmission period representing one bit of the control signal is preset to N. The data transmission period N is usually set to 1 / 10 of the cycle of the low-frequency AC power used for power supply. The data transmission periods of the fifth and sixth digital signals are also set to N. If a bit of the control signal is 1, within one cycle, the fifth and sixth digital signals maintain opposite logic levels and both have a frequency of F1. By switching the logic levels of the fifth and sixth digital signals, the output terminal of the control signal transmitting module is driven to generate multiple high-frequency AC currents with a data transmission period of N in sequence, thereby representing that bit of the torque signal is 1. If a bit of the control signal is 0, within one data transmission period, the fifth digital signal remains at a low level and the sixth digital signal remains at a high level, thereby generating a low-level signal for one data transmission period at the output terminal of the control signal transmitting module, thereby representing that bit of the control signal is 0.

[0038] In this embodiment, when a certain data bit of the output control signal is 1, the ninth field-effect transistor Q9 and the tenth field-effect transistor Q10 are in opposite on and off states, switching between the two states; when a certain data bit of the output control signal is 0, the ninth field-effect transistor Q9 is continuously off and the tenth field-effect transistor Q10 is continuously on. After the control signal transmitting module is connected to the operating voltage, when the gate of the ninth field-effect transistor Q9 receives the fifth digital signal and the gate of the tenth field-effect transistor Q10 receives the sixth digital signal, when the fifth digital signal is high and the sixth digital signal is low, the ninth field-effect transistor Q9 is turned on and the tenth field-effect transistor Q10 is turned off. At this time, the current connected to the power supply terminal of the control signal transmitting module flows through the drain and source of the ninth field-effect transistor Q9 and then into the sixth capacitor C6, generating a high level at the output terminal of the control signal transmitting module. When the fifth digital signal is low and the sixth digital signal is high, the ninth field-effect transistor Q9 is turned off and the tenth field-effect transistor Q10 is turned on. The sixth capacitor C6 releases its charge, which flows into the drain of the tenth field-effect transistor Q10 and out to ground through the source of the tenth field-effect transistor Q10. At this time, the output terminal of the control signal transmitting module outputs a low level. Therefore, by controlling the ninth field-effect transistor Q9 and the tenth field-effect transistor Q10 to turn on or off through the fifth and sixth digital signals, the output of the control signal transmitting module generates a high-frequency alternating current characterizing the control signal. Then, through the high-frequency resonant network formed by the fourth capacitor C4 and the second primary coil, the high-frequency alternating current is amplified and transmitted to the second stage coil.

[0039] Example 8: This example is basically the same as Example 7, except that: in this example, as Figure 9 As shown, the control signal receiving module includes a seventh capacitor C7, an eleventh field-effect transistor Q11, a twelfth field-effect transistor Q12, and a second resistor R2. The source of the eleventh field-effect transistor Q11 is the first input terminal of the control signal receiving module. The drain of the eleventh field-effect transistor Q11, one end of the seventh capacitor C7, and one end of the second resistor R2 are connected, and their connection terminal is the first output terminal of the control signal receiving module. The source of the twelfth field-effect transistor Q12 is grounded. The drain of the twelfth field-effect transistor Q12, the other end of the seventh capacitor C7, and the other end of the second resistor R2 are connected, and their connection terminal is the second output terminal of the control signal receiving module. The gates of the eleventh field-effect transistor Q11 and the twelfth field-effect transistor Q12 are connected, and their connection terminal is the second input terminal of the control signal receiving module. When the control signal receiving module is turned on, the seventh capacitor C7 and the first primary coil form a first high-frequency resonant network. In this embodiment, when the second input terminal of the control signal receiving module is connected to a high level, the eleventh field-effect transistor Q11 and the twelfth field-effect transistor Q12 are turned on. At this time, the low- and high-frequency mixed AC current generated by the magnetoelectric coupling between the first primary coil and the first secondary coil flows through the source of the eleventh field-effect transistor Q11, then through the drain of the eleventh field-effect transistor Q11 and the seventh capacitor C7, and then flows into the drain of the twelfth field-effect transistor Q12 and out to ground through its source. The first high-frequency resonant network formed by the seventh capacitor C7 and the first primary coil selects the frequency of the low- and high-frequency mixed AC current, suppresses the low-frequency AC current, and amplifies the high-frequency AC current representing the control signal. Then, it outputs the high-frequency AC current between the first output terminal and the second output terminal of the control signal receiving module, thereby transmitting the high-frequency AC current representing the control signal to the first signal demodulation module through the first output terminal and the second output terminal of the control signal receiving module. When the second input terminal of the control signal receiving module is connected to a low level, the eleventh field-effect transistor Q11 and the twelfth field-effect transistor Q12 are turned off. At this time, the low-frequency mixed AC power that comes from the magnetic coupling between the first primary coil and the first secondary coil cannot enter from the first input terminal of the control signal receiving module.

[0040] Example 9: This example is basically the same as Example 8, except that: in this example, as Figure 10As shown, the first signal demodulation module includes a second differential amplifier circuit, a bandpass filter circuit, an envelope detector circuit, a low-pass filter circuit, and a hysteresis comparator circuit. The second differential amplifier circuit has a power supply terminal, a first input terminal, a second input terminal, and an output terminal. The bandpass filter circuit has a power supply terminal, an input terminal, and an output terminal. The envelope detector circuit has a power supply terminal, an input terminal, and an output terminal. The low-pass filter circuit has a power supply terminal, an input terminal, and an output terminal. The power supply terminals of the second differential amplifier circuit, the bandpass filter circuit, the envelope detector circuit, the low-pass filter circuit, and the hysteresis comparator circuit are respectively connected to the first power conditioning module and connected to its operating voltage. The hysteresis comparator circuit has a power supply terminal, a first input terminal, and a second input terminal. The second input and output terminals; the first and second input terminals of the second differential amplifier circuit are the first and second input terminals of the control signal receiving module; the output terminal of the second differential amplifier circuit is connected to the input terminal of the bandpass filter circuit, the output terminal of the bandpass filter circuit is connected to the input terminal of the envelope detector circuit, the output terminal of the envelope detector circuit is connected to the input terminal of the low-pass filter circuit, the output terminal of the low-pass filter circuit is connected to the first input terminal of the hysteresis comparator circuit, and the second input terminal of the hysteresis comparator circuit is connected to the standard voltage Vref, which is input by the first power conditioning module; the second signal demodulation module has the same structure as the first signal demodulation module.

[0041] In this embodiment, the first signal demodulation module and the second signal demodulation module provide core protection for the anti-interference performance of the torque sensor. They are respectively used to convert the high-frequency AC power representing the control signal or the high-frequency AC power representing the torque signal into digital signals representing the control signal or the torque signal.

[0042] In this embodiment, when a high-frequency alternating current is received between the first and second input terminals of the second differential amplifier circuit, the high-frequency alternating current inevitably carries a large amount of noise derived from the low-frequency alternating current. The second differential amplifier circuit amplifies the received high-frequency alternating current to a preset amplitude and transmits it to the bandpass filter circuit. The bandpass filter circuit uses a three-stage bandpass filter to further filter low-frequency alternating current interference and other electromagnetic interference from the high-frequency alternating current before transmitting it to the envelope detector circuit. The envelope detector circuit performs envelope detection on the high-frequency alternating current and extracts the envelope signal, which is then transmitted to the low-pass filter circuit. The low-pass filter circuit removes the high-frequency alternating current carrier from the envelope signal, obtaining the data transmission alternating current representing the control signal, which is then transmitted to the hysteresis comparator circuit. The hysteresis comparator circuit compares the low-frequency alternating current representing the control signal with a standard voltage to obtain a digital signal output.

[0043] Example 10: This example is basically the same as Example 9, except that: In this example, the torque acquisition module includes a bridge circuit, a differential amplifier circuit, and an ADC analog-to-digital converter circuit; the bridge circuit has a power supply terminal, an input terminal, a first output terminal, and a second output terminal; the first differential amplifier circuit has a power supply terminal, a first input terminal, a second input terminal, and an output terminal; the ADC analog-to-digital converter circuit has a power supply terminal, an input terminal, and an input / output terminal; the power supply terminals of the bridge circuit, the first differential amplifier circuit, and the ADC analog-to-digital converter circuit are respectively connected to the first power conditioning module and connected to its operating voltage; the input terminal of the bridge circuit is used to acquire torque signals, and the first and second output terminals of the bridge circuit are respectively connected to the first and second input terminals of the first differential amplifier circuit; the first output terminal of the first differential amplifier circuit is connected to the first input terminal of the ADC analog-to-digital converter circuit, and the input / output terminals of the ADC analog-to-digital converter circuit are connected to the communication terminal of the first controller.

[0044] In this embodiment, when the input terminal of the bridge circuit senses torque, the bridge circuit converts the torque signal into a weak voltage signal, which is then output to the first differential amplifier circuit through the first output terminal and the second output terminal. The first differential amplifier circuit amplifies the weak voltage signal to a preset voltage range and then outputs it to the ADC analog-to-digital converter circuit. The ADC analog-to-digital converter circuit converts the voltage signal into a digital signal representing the torque signal and outputs it to the first controller.

[0045] The single-coil magnetic coupling wireless power supply and signal synchronous transmission torque sensor of the present invention was simulated and tested using Multisim software to simulate the synchronous transmission of control signals and power supply signals.

[0046] During simulation testing, the control signal is set as a cyclic sequence of binary data 0 and 1, with each bit of the cyclic sequence having a transmission period of 25µs, meaning the duration of a high level representing 1 or a low level representing 0 is 25µs. A fifth and a sixth digital signal are connected to the first and second input terminals of the control signal transmitting module. Specifically, the fifth and sixth digital signals are set to have opposite logic states and alternating high and low levels at a frequency of 2MHz, so that the output of the control signal transmitting module can synchronously generate a high-frequency AC current with a period of 25µs and a frequency of 2MHz to represent a specific bit of the control signal as 1. The fifth digital signal is set to remain low for 25µs, and the sixth digital signal is set to remain high for 25µs, so that the output of the control signal transmitting module generates a low level with a period of 25µs to represent a specific bit of the control signal as 0. During simulation, the fifth and sixth digital signals are configured accordingly to achieve real-time transmission of 0 and 1.

[0047] Test point 1 is set at the output of the control signal transmitting module, test point 2 is set at the output of the control signal receiving module, test point 3 is set at the output of the low-pass filter circuit of the first signal demodulation module, and test point 4 is set at the output of the hysteresis comparator circuit. The results are as follows: Figure 11 The control signal transmission waveform simulation diagram is shown in Figure 11. In Figure 11, the horizontal axis represents time, with a scale of 50 µs / div, meaning each dashed line represents 50 microseconds; the vertical axis represents voltage, with a scale of 50 V / div, meaning each dashed line represents 50 volts. From... Figure 11 It can be seen that test points 1, 2, 3, and 4 can output clear high-frequency AC signals representing control signals, high-frequency AC signals with noise, data transmission AC signals representing control signals, and digital signal AC signals, respectively. The first signal demodulation module demodulates accurate and complete control signals. Therefore, it can be concluded that when the single-coil magnetically coupled wireless power supply and signal synchronous transmission torque sensor of this invention is working, even if the control signal and power supply signal are transmitted synchronously, the power supply signal will not cause aliasing interference to the control signal, thus achieving the design goal of synchronous transmission of power supply and control signals without mutual interference.

[0048] Since the torque signal transmitting module and the control signal transmitting module have the same structure, and the first signal demodulation module and the second signal demodulation module have the same structure, the torque signal is set as a cyclic sequence of binary data 0 and 1. The third and fourth digital signals are set using the same setting method as the fifth and sixth digital signals used in the control signal simulation. Test point 1 is set at the output of the torque signal transmitting module, test point 2 is set at the output of the torque signal receiving module, test point 3 is set at the output of the low-pass filter circuit of the second signal demodulation module, and test point 4 is set at the output of the hysteresis comparator circuit. Using the same simulation test method as the control signal, the single-coil magnetic coupling wireless power supply and signal synchronous transmission torque sensor of the present invention is subjected to simulation test of the synchronous transmission of torque signal and power supply signal. The results are as follows: Figure 12 The waveform simulation diagram of torque signal transmission is shown. Figure 12 In the graph, the horizontal axis represents time, with a scale of 50 µs / div, meaning each horizontal dashed line divides a small square representing 50 microseconds; the vertical axis represents voltage, with a scale of 50 V / div, meaning each vertical dashed line divides a small square representing 50 volts. Analysis Figure 12It can be seen that test points 1, 2, 3, and 4 can output clear high-frequency AC signals representing torque, high-frequency AC signals with noise, AC signals representing torque data transmission, and digital signal AC signals, respectively. The second signal demodulation module demodulates the accurate and complete torque signal. Therefore, it can be concluded that when the single-coil magnetically coupled wireless power supply and synchronous signal transmission torque sensor of this invention is working, even if the torque signal and the power supply signal are transmitted synchronously, the power supply signal will not cause aliasing interference to the torque signal, thus achieving the design goal of synchronous transmission of power supply and torque signals without interference.

[0049] In summary, the single-coil magnetic coupling wireless power supply and signal synchronous transmission torque sensor of the present invention replaces an independent coil that requires additional processing and installation by setting a first transformer and a first composite transmission module that can be integrated into the rotor assembly, and replacing an independent coil that requires additional processing and installation by setting a second transformer and a second composite transmission module that can be integrated into the stator assembly. With only a pair of independent coils, power transmission and signal transmission are realized simultaneously. This reduces the number of independent coils in the design of the torque sensor, greatly reduces its assembly difficulty and cost, significantly improves its long-term operational reliability, and has broad application prospects.

Claims

1. A single-coil magnetically coupled wireless power supply and signal synchronous transmission torque sensor, comprising a rotor assembly and a stator assembly; the rotor assembly includes a torque acquisition module, a first signal control and processing module, a first power conditioning module, and a first coil; the torque acquisition module is connected to the first signal control and processing module, and the first power conditioning module is connected to both the torque acquisition module and the first signal control and processing module; the stator assembly includes a second signal control and processing module, a second power conditioning module, a communication module, and a second coil; the second signal control and processing module is connected to the communication module, and the second power conditioning module is connected to the second signal control and processing module; the first coil and the second coil can generate corresponding alternating current through electromagnetic coupling; characterized in that... The rotor assembly further includes a first transformer and a first composite transmission module; the first transformer has a primary coil and a secondary coil, the primary coil being referred to as the first primary coil and the secondary coil as the first secondary coil; one end of the first primary coil is connected to the first signal control and processing module, and the other end is grounded; one end of the first secondary coil is connected to the first composite transmission module, and the other end is connected to one end of the first coil; the other end of the first coil is connected to the first composite transmission module, and the first composite transmission module is connected to the first power conditioning module; the first composite transmission module, the first primary coil, and the first coil constitute a first series circuit; the first primary coil and the first signal control and processing module constitute a first high-frequency resonant network; the first high-frequency resonant network is used to amplify the high-frequency AC output from the first signal control and processing module and inject it into the first series circuit, and to select the frequency of the low-frequency mixed AC in the first series circuit, amplify the high-frequency AC, and output it to the first signal control and processing module; when the first coil and the second coil are electromagnetically coupled to generate low-frequency AC injected into the first series circuit, the first composite transmission module will receive the low-frequency AC; when the first high-frequency resonant network injects high-frequency AC into the first series circuit, the high-frequency AC... The current will superimpose with the low-frequency AC already injected in the first series circuit to form a low-to-high frequency mixed AC, causing the first coil to generate a low-to-high frequency mixed AC. When the first coil generates high-frequency AC due to electromagnetic coupling with the second coil and injects it into the first series circuit, it will superimpose with the low-frequency AC already injected in the first series circuit to form a low-to-high frequency mixed AC that is loaded onto the first primary coil. The first composite transmission module and the first coil form a low-frequency resonant network, converting the low-frequency AC in the first series circuit into DC and outputting it to the first power conditioning module. The stator assembly also includes a second transformer and a second composite transmission module. The second transformer has... The system comprises a primary coil and a secondary coil, with the primary coil referred to as the second primary coil and the secondary coil as the second secondary coil. One end of the second primary coil is connected to the second signal control and processing module, and the other end is grounded. One end of the second secondary coil is connected to the second composite transmission module, and the other end is connected to one end of the second coil. The other end of the second coil is connected to the second composite transmission module, which is connected to the second power conditioning module. The second coil, the second secondary coil, and the second composite transmission module constitute a second series circuit. The second primary coil and the second signal control and processing module constitute a second high-frequency resonant network.The second high-frequency resonant network amplifies the high-frequency AC output from the second signal control and processing module and injects it into the second series circuit. It also selects the frequency of the low-to-high-frequency mixed AC generated in the second series circuit, amplifies the high-frequency AC, and outputs it to the second signal control and processing module. The second composite transmission module and the second coil form a low-frequency resonant network. When the second composite transmission module generates low-frequency AC and injects it into the second series circuit, it causes the second coil to generate low-frequency AC. When the second high-frequency resonant network injects high-frequency AC into the second series circuit, this high-frequency AC superimposed on the low-frequency AC already injected into the second series circuit, causing the second coil to generate a low-to-high-frequency mixed AC. When the second coil generates a low-to-high-frequency mixed AC due to electromagnetic coupling with the first coil and injects it into the second series circuit, this low-to-high-frequency mixed AC is loaded onto the second-stage coil.

2. The single-coil magnetically coupled wireless power supply and signal synchronous transmission torque sensor according to claim 1, characterized in that, The second composite transmission module has a power supply terminal, a first input / output terminal, a second input / output terminal, a first input terminal, and a second input terminal. The power supply terminal of the second composite transmission module is connected to the second power conditioning module. The first input / output terminal is connected to one end of the second secondary coil, and the second input / output terminal is connected to the other end of the second coil. The first input terminal is connected to the second signal control and processing module and receives a first digital signal. The second input terminal is connected to the second signal control and processing module and receives a second digital signal. The frequencies of the first digital signal and the second digital signal switch between two preset frequencies according to a preset period, and the two signals maintain opposite logic and the same frequency, so as to drive the second composite transmission module to generate a low-frequency AC output between its first input / output terminal and its second input / output terminal. The second composite transmission module includes a first field-effect transistor (FET), a second FET, a third FET, a fourth FET, and a first capacitor. The source of the second FET and the source of the fourth FET are connected, and their connection point is the power supply terminal of the second composite transmission module. The drain of the second FET and the source of the first FET are connected, and their connection point is the first input / output terminal of the second composite transmission module. The drains of the first FET and the third FET are both grounded. The source of the third FET, the drain of the fourth FET, and one end of the first capacitor are connected. The other end of the first capacitor is the second input / output terminal of the second composite transmission module. The first capacitor can form a low-frequency resonant network with the second coil. The gate of the first FET and the gate of the fourth FET are connected, and their connection point is the first input terminal of the second composite transmission module. The gate of the second FET and the gate of the third FET are connected, and their connection point is the second input terminal of the second composite transmission module.

3. The single-coil magnetic coupling wireless power supply and signal synchronous transmission torque sensor according to claim 2, characterized in that: The first composite transmission module has a first AC input / output terminal, a second AC input / output terminal, and an output terminal. The first AC input / output terminal of the first composite transmission module is connected to one end of the first primary coil, the second AC input / output terminal is connected to the other end of the first coil, and the output terminal is connected to the first power conditioning module. The first composite transmission module includes a second capacitor, a third capacitor, a first diode, a second diode, a third diode, and a fourth diode. The third capacitor is a filter capacitor. The second capacitor and the first coil form a low-frequency resonant network. The anode of the first diode is connected to the cathode of the third diode, and its connection end is the first AC input / output terminal of the first composite transmission module. The anode of the second diode, the cathode of the fourth diode, and one end of the second capacitor are connected. The other end of the second capacitor is the second AC input / output terminal of the first composite transmission module. The cathodes of the first diode, the cathodes of the second diode, and one end of the third capacitor are connected, and their connection end is the output terminal of the first composite transmission module. The anodes of the third diode, the anodes of the fourth diode, and the other end of the third capacitor are all grounded.

4. The single-coil magnetic coupling wireless power supply and signal synchronous transmission torque sensor according to claim 3, characterized in that: The first signal control and processing module includes a torque signal transmitting module, a control signal receiving module, a first signal demodulation module, and a first controller; the torque signal transmitting module has a power supply terminal, an output terminal, a first input terminal, and a second input terminal; the control signal receiving module has a first output terminal, a second output terminal, a first input terminal, and a second input terminal; the first signal demodulation module has a power supply terminal, a first input terminal, a second input terminal, and an output terminal; The first controller has a power supply terminal, a first output terminal, a second output terminal, a third output terminal, an input terminal, and a communication terminal. The power supply terminals of the torque signal transmitting module, the first signal demodulation module, and the first controller are respectively connected to the first power conditioning module. The output terminal of the torque signal transmitting module is connected to one end of the first primary coil, the first input terminal is connected to the second output terminal of the first controller, and the second input terminal is connected to the third output terminal of the first controller. The first input terminal of the control signal receiving module is connected to one end of the second primary coil, the second input terminal is connected to the first output terminal of the first controller, the first output terminal is connected to the first input terminal of the first signal demodulation module, and the second output terminal is connected to the second input terminal of the first signal demodulation module. The output terminal of the first signal demodulation module is connected to the input terminal of the first controller. The communication terminal of the first controller is connected to the torque acquisition module and is used to output control signals to the torque acquisition module and receive digital signals representing torque signals output by the torque acquisition module. The first controller can acquire the digital signals representing torque signals received by its communication terminal and generate corresponding third and fourth digital signals, which are output to the torque signal transmitting module through its second and third output terminals, respectively. The first controller outputs a high or low level signal to the control signal receiving module through its first output terminal, thereby turning the control signal receiving module on or off. When the control signal receiving module is on, the first controller does not output the third and fourth digital signals to the torque signal transmitting module. When the control signal receiving module is off, the first controller outputs the third and fourth digital signals to the torque signal transmitting module. At this time, the torque signal transmitting module and the first primary coil form the first high-frequency resonant network. This first high-frequency resonant network selects the frequency of the low-frequency mixed AC power output by the first primary coil, suppressing the low-frequency AC power within it. The high-frequency alternating current inside is amplified and transmitted to the first signal demodulation module through the first and second output terminals of the control signal receiving module; the control signal receiving module is not operational when it is off; the torque signal transmitting module is used to generate a high-frequency alternating current characterizing the torque signal and apply it to the first primary coil under the drive of the third and fourth digital signals; the first signal demodulation module is used to demodulate the high-frequency alternating current connected to its first and second input terminals to obtain a digital signal as a control signal, and transmit it to the first controller through its output terminal, and the first controller controls the torque acquisition module to acquire the torque according to the control signal.

5. The single-coil magnetic coupling wireless power supply and signal synchronous transmission torque sensor according to claim 4, characterized in that: The second signal control and processing module includes a torque signal receiving module, a control signal transmitting module, a second signal demodulation module, and a second controller; the torque signal receiving module has a first output terminal, a second output terminal, a first input terminal, and a second input terminal; the control signal transmitting module has a power supply terminal, an output terminal, a first input terminal, and a second input terminal; the second signal demodulation module has a power supply terminal, a first input terminal, a second input terminal, and an output terminal. The second controller has a power supply terminal, a first output terminal, a second output terminal, a third output terminal, a fourth output terminal, a fifth output terminal, an input terminal, and a communication terminal; the control signal transmitting module, the second signal demodulation module, and the power supply terminal of the second controller are respectively connected to the second power conditioning module; the output terminal of the control signal transmitting module and the first input terminal of the torque signal receiving module are respectively connected to one end of the second primary coil; the first input terminal of the control signal transmitting module is connected to the second output terminal of the second controller, and the second input terminal is connected to the third output terminal of the second controller; the first output terminal of the torque signal receiving module is connected to the first input terminal of the second signal demodulation module, and the second output terminal is connected to the... The second input terminal of the second signal demodulation module is connected to the first output terminal of the second controller; the output terminal of the second signal demodulation module is connected to the input terminal of the second controller; the fourth and fifth output terminals of the second controller are respectively connected to the first and second input / output terminals of the second composite transmission module, for outputting a first digital signal and a second digital signal to the second composite transmission module; the communication terminal of the second controller is connected to the communication module, for receiving power-on commands, control signals, or outputting digital signals representing torque signals; when a power-on command is received, the fourth and fifth output terminals of the second controller output the first digital signal and the second digital signal respectively; when a control signal is received... At this time, the second and third output terminals of the second controller output the fifth and sixth digital signals respectively; the second controller outputs a high or low level to the torque signal receiving module through its first output terminal to control the torque signal receiving module to turn on or off; the torque signal receiving module does not work when it is off; when the torque signal receiving module is on, the second controller does not output the fifth and sixth digital signals to the control signal sending module, and the control signal sending module does not work. At this time, the torque signal receiving module and the second primary coil form the second high-frequency resonant network, which selects the frequency of the low-frequency mixed AC power output by the second secondary coil, suppresses the low-frequency AC power, and amplifies the high-frequency AC power before it is received by the torque signal receiving module. The first and second output terminals output high-frequency AC power to the second signal demodulation module. When the second controller outputs the fifth and sixth digital signals to the control signal transmitting module, the torque signal receiving module is turned off. The control signal transmitting module and the second primary coil form the second high-frequency resonant network. Driven by the fifth and sixth digital signals, the control signal transmitting module generates high-frequency AC power representing the control signal. This high-frequency AC power is amplified by the second high-frequency resonant network and then applied to the second primary coil. The second signal demodulation module demodulates the high-frequency AC power output from the torque signal receiving module to obtain a digital signal representing the torque signal, which is transmitted to the second controller through its output terminal.

6. The single-coil magnetically coupled wireless power supply and signal synchronous transmission torque sensor according to claim 5, characterized in that: The torque signal transmitting module includes a fourth capacitor, a fifth field-effect transistor (FET), and a sixth FET. The drain of the fifth FET is the power supply terminal of the torque signal transmitting module. The source of the fifth FET, the drain of the sixth FET, and one end of the fourth capacitor are connected. The other end of the fourth capacitor is the output terminal of the torque signal transmitting module, and the source of the sixth FET is grounded. The gate of the fifth FET is the first input terminal of the torque signal transmitting module. The gate of the sixth FET is the second input terminal of the torque signal transmitting module. The fourth capacitor is used to form a first high-frequency resonant network with the first primary coil.

7. The single-coil magnetic coupling wireless power supply and signal synchronous transmission torque sensor according to claim 6, characterized in that: The torque signal receiving module includes a fifth capacitor, a seventh field-effect transistor (FET), an eighth field-effect transistor (FET), and a first resistor. The source of the seventh FET is the first input terminal of the torque signal receiving module. The drain of the seventh FET, one end of the fifth capacitor, and one end of the first resistor are connected, and their connection point is the first output terminal of the torque signal receiving module. The source of the eighth FET is grounded. The drain of the eighth FET, the other end of the fifth capacitor, and the other end of the first resistor are connected, and their connection point is the second output terminal of the torque signal receiving module. The gates of the seventh and eighth FETs are connected, and their connection point is the second input terminal of the torque signal receiving module. The fifth capacitor is used to form a second high-frequency resonant network with the second primary coil when the torque signal receiving module is turned on.

8. The single-coil magnetic coupling wireless power supply and signal synchronous transmission torque sensor according to claim 7, characterized in that: The control signal transmitting module includes a sixth capacitor, a ninth field-effect transistor (FET), and a tenth FET. The drain of the ninth FET is the power supply terminal of the control signal transmitting module. The source of the ninth FET, the drain of the tenth FET, and one end of the sixth capacitor are connected. The other end of the sixth capacitor is the output terminal of the control signal transmitting module, and the source of the tenth FET is grounded. The gate of the ninth FET is the first input terminal of the control signal transmitting module. The gate of the tenth FET is the second input terminal of the control signal transmitting module. The sixth capacitor and the second primary coil form a second high-frequency resonant network.

9. The single-coil magnetic coupling wireless power supply and signal synchronous transmission torque sensor according to claim 8, characterized in that: The control signal receiving module includes a seventh capacitor, an eleventh field-effect transistor (FET), a twelfth field-effect transistor (FET), and a second resistor. The source of the eleventh FET is the first input terminal of the control signal receiving module. The drain of the eleventh FET is connected to one end of the seventh capacitor and one end of the second resistor, and the connection point is the first output terminal of the control signal receiving module. The source of the twelfth FET is grounded. The drain of the twelfth FET is connected to the other end of the seventh capacitor and the other end of the second resistor, and the connection point is the second output terminal of the control signal receiving module. The gates of the eleventh FET and the twelfth FET are connected, and the connection point is the second input terminal of the control signal receiving module. When the control signal receiving module is turned on, the seventh capacitor and the first primary coil form a first high-frequency resonant network.

10. The single-coil magnetic coupling wireless power supply and signal synchronous transmission torque sensor according to claim 9, characterized in that: The first signal demodulation module includes a second differential amplifier circuit, a bandpass filter circuit, an envelope detector circuit, a low-pass filter circuit, and a hysteresis comparator circuit; The second differential amplifier circuit has a power supply terminal, a first input terminal, a second input terminal, and an output terminal; the bandpass filter circuit has a power supply terminal, an input terminal, and an output terminal; the envelope detector circuit has a power supply terminal, an input terminal, and an output terminal. The low-pass filter circuit has a power supply terminal, an input terminal, and an output terminal; the power supply terminals of the second differential amplifier circuit, band-pass filter circuit, envelope detector circuit, low-pass filter circuit, and hysteresis comparator circuit are respectively connected to the first power conditioning module and connected to its operating voltage; the hysteresis comparator circuit has a power supply terminal, a first input terminal, a second input terminal, and an output terminal; the first and second input terminals of the second differential amplifier circuit are the first and second input terminals of the control signal receiving module; the output terminal of the second differential amplifier circuit is connected to the input terminal of the band-pass filter circuit, the output terminal of the band-pass filter circuit is connected to the input terminal of the envelope detector circuit, the output terminal of the envelope detector circuit is connected to the input terminal of the low-pass filter circuit, the output terminal of the low-pass filter circuit is connected to the first input terminal of the hysteresis comparator circuit, and the second input terminal of the hysteresis comparator circuit is connected to a standard voltage; the second signal demodulation module has the same structure as the first signal demodulation module.

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