Compatible sensor signal acquisition circuit and signal processing method thereof

Abstract

The invention provides a compatible sensor signal acquisition circuit and a signal processing method thereof.The compatible sensor signal acquisition circuit comprises a sensor configuration circuit, a differential amplification circuit, a signal conversion circuit, a control processor and a digital isolator, and the digital isolator is connected with the sensor configuration circuit and the control processor; the differential amplification circuit is respectively connected with the sensor configuration circuit and the signal conversion circuit, the control processor is also connected with the signal conversion circuit, and the sensor configuration circuit is connected with different types of instability sensors. By introducing the digital isolator and the sensor configuration circuit, a voltage signal and a current signal can be selected, so that compatibility with different types of sensors is realized, and when a vehicle is provided with a current type instability sensor and a voltage type instability sensor at the same time, the stability of the vehicle is improved. And instability early warning and alarming functions during transverse instability of the bogie can also be realized.

Description

Technical Field

[0001] The present invention relates to the technical field of sensor signal acquisition, and in particular to a compatible sensor signal acquisition circuit and a signal processing method thereof. Background Art

[0002] In the existing rail transit vehicle instability detection system, the instability detection device uses a sensor signal acquisition circuit to realize the signal acquisition of the instability sensor. The output signals of the rail transit vehicle instability sensor are mainly current type and voltage type. The sensor signal acquisition circuit of the instability detection device is generally composed of a sensor power supply circuit, a current-voltage conversion circuit, a differential amplifier circuit, a filter circuit and a signal conversion circuit.

[0003] However, since this sensor signal acquisition circuit has no signal selection function, it is not compatible with different types of instability sensors, which results in the inability to implement instability warning and alarm when the bogie is lateral instability when the vehicle is equipped with both current-type instability sensors and voltage-type instability sensors. In addition, when the vehicle is equipped with both current-type instability sensors and voltage-type instability sensors, multiple sets of differential amplifier circuits and signal conversion circuits will be equipped accordingly. Due to the differences in vehicle instability warning and alarm diagnostic logic, this will make it difficult to compare and analyze the instability status of multiple vehicles. Summary of the invention

[0004] In view of this, the present invention provides a compatible sensor signal acquisition circuit and a signal processing method thereof to solve at least one of the above-mentioned problems.

[0005] In order to achieve the above object, the present invention adopts the following scheme:

[0006] According to a first aspect of the present invention, there is provided a compatible sensor signal acquisition circuit, comprising: a sensor configuration circuit, a differential amplifier circuit, a signal conversion circuit, a control processor and a digital isolator, wherein the digital isolator is respectively connected to the sensor configuration circuit and the control processor, the differential amplifier circuit is respectively connected to the sensor configuration circuit and the signal conversion circuit, the control processor is also connected to the signal conversion circuit, and the sensor configuration circuit is connected to different types of instability sensors.

[0007] As an embodiment of the present invention, the different types of instability sensors include voltage-type instability sensors and current-type instability sensors.

[0008] As an embodiment of the present invention, the digital isolator is selected from any one of an optocoupler, a capacitive coupler or an inductive coupler.

[0009] As an embodiment of the present invention, when the digital isolator is an optocoupler, the digital isolator includes a light emitting diode and a phototransistor, the light emitting diode and the phototransistor are connected in series, the other end of the light emitting diode is connected to the control processor, and the other end of the phototransistor is connected to the sensor configuration circuit.

[0010] As an embodiment of the present invention, the sensor configuration circuit includes a first resistor, a second resistor, a third resistor, and a field effect transistor, wherein:

[0011] The first end of the first resistor is connected to different types of instability sensors, and the second end is connected to the drain of the field effect tube;

[0012] The first end of the second resistor is connected to the first end of the first resistor, and the second end of the second resistor is connected to the first end of the third resistor and the signal input end of the differential amplifier circuit;

[0013] The second end of the third resistor is grounded;

[0014] The source of the field effect tube is grounded, and the gate of the field effect tube is connected to the output end of the digital isolator.

[0015] As an embodiment of the present invention, the compatible sensor signal acquisition circuit further includes a surge protector, and the surge protector is connected to the output end of the instability sensor.

[0016] According to a second aspect of the present invention, there is provided a signal processing method for a compatible sensor signal acquisition circuit, the method being performed by the compatible sensor signal acquisition circuit as described above, the method comprising: receiving an analog input signal from a current-type instability sensor or a voltage-type instability sensor; outputting a digital signal to a digital isolator through a control processor according to the type of the current-type instability sensor or the voltage-type instability sensor, the digital isolator generating a sensor selection signal according to the digital signal and sending it to a sensor configuration circuit; the sensor configuration circuit selecting and connecting the analog input signal emitted by the corresponding current-type instability sensor or voltage-type instability sensor according to the sensor selection signal, and converting the analog input signal into a secondary sensor signal; inputting the secondary sensor signal into a differential amplifier circuit for amplification processing to obtain a tertiary sensor signal; inputting the tertiary sensor signal into a signal conversion circuit for analog-to-digital conversion to obtain a sensor digital signal; and inputting the sensor digital signal into the control processor for data processing and instability early warning alarm diagnosis.

[0017] According to a third aspect of the present invention, there is provided an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the above method when executing the computer program.

[0018] According to a fourth aspect of the present invention, there is provided a computer-readable storage medium having a computer program stored thereon, wherein the computer program implements the steps of the above method when executed by a processor.

[0019] According to a fifth aspect of the present invention, there is provided a computer program product, comprising a computer program / instructions, which implement the steps of the above method when executed by a processor.

[0020] It can be seen from the above technical solution that the compatible sensor signal acquisition circuit and its signal processing method provided by the present application can select voltage signals and current signals by introducing digital isolators and sensor configuration circuits, thereby achieving compatibility with different types of sensors. Then, when the vehicle is equipped with both current-type instability sensors and voltage-type instability sensors, the instability warning and alarm functions when the bogie is lateral instability can also be achieved. Moreover, due to the implementation of sensor signal selection, the present application can share differential amplifier circuits and signal conversion circuits, thereby facilitating the unified diagnosis algorithm and solving the problem of difficult comparative analysis of the instability states of different types of instability sensors on multiple vehicles. Finally, field effect transistors are used in the present application to achieve signal selection. The switch selection action of the field effect transistor is reliable, the structure is simple, the cost is low, and the reliability is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the prior art descriptions. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0022] Figure 1 It is a structural schematic diagram of a compatible sensor signal acquisition circuit provided in an embodiment of the present application;

[0023] Figure 2 is a schematic diagram of the structure of the sensor configuration circuit provided in an embodiment of the present application;

[0024] Figure 3 is a structural schematic diagram of a compatible sensor signal acquisition circuit provided by another embodiment of the present application;

[0025] Figure 4 is a schematic diagram of the structure of a differential amplifier circuit provided in an embodiment of the present application;

[0026] Figure 5 It is a flow chart of a signal processing method of a compatible sensor signal acquisition circuit provided in an embodiment of the present application;

[0027] Figure 6 It is a schematic block diagram of the system structure of the electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0028] To make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings. Here, the exemplary embodiments of the present invention and their descriptions are used to explain the present invention, but are not intended to limit the present invention.

[0029] As shown in this application and claims, unless the context clearly indicates an exception, the words "a", "an", "an" and / or "the" do not refer to the singular and may also include the plural. Generally speaking, the terms "include" and "comprise" only indicate the inclusion of the steps and elements that have been clearly identified, and these steps and elements do not constitute an exclusive list. The method or device may also include other steps or elements.

[0030] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the present application. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant field may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so that once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0031] In the description of the present application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present application; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0032] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0033] In addition, it should be noted that the use of words such as "first" and "second" to define components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above words have no special meaning and cannot be understood as limiting the scope of protection of this application. In addition, although the terms used in this application are selected from well-known and commonly used terms, some terms mentioned in the specification of this application may be selected by the applicant at his or her discretion, and their detailed meanings are explained in the relevant parts of the description of this article. In addition, it is required to understand this application not only by the actual terms used, but also by the meaning implied by each term.

[0034] It should be understood that when a component is referred to as being "on another component," "connected to another component," "coupled to another component," or "contacting another component," it may be directly on, connected to, coupled to, or contacting the other component, or there may be intervening components. In contrast, when a component is referred to as being "directly on another component," "directly connected to," "directly coupled to," or "directly contacting" another component, there are no intervening components. Similarly, when a first component is referred to as being "electrically in contact with" or "electrically coupled to" a second component, there is an electrical path between the first component and the second component that allows current to flow. The electrical path may include capacitors, coupled inductors, and / or other components that allow current to flow, even without direct contact between conductive components.

[0035] In order to solve the problem in the prior art that the sensor signal acquisition circuit has no signal selection function and is therefore not compatible with different types of unstable sensors, the present application provides a compatible sensor signal acquisition circuit, which adds a signal selection function on the basis of a traditional sensor signal acquisition circuit.

[0036] like Figure 1The figure shows a schematic diagram of the structure of a compatible sensor signal acquisition circuit provided in an embodiment of the present application, which includes: a sensor configuration circuit 1, a differential amplifier circuit 2, a signal conversion circuit 3, a control processor 4 and a digital isolator 5, the digital isolator 5 is respectively connected to the sensor configuration circuit 1 and the control processor 4, the differential amplifier circuit 2 is respectively connected to the sensor configuration circuit 1 and the signal conversion circuit 3, the control processor 4 is also connected to the signal conversion circuit 3, and the sensor configuration circuit 1 is connected to different types of instability sensors.

[0037] Preferably, in this embodiment, the different types of instability sensors include voltage-type instability sensors and current-type instability sensors, wherein the voltage-type instability sensor outputs a voltage signal, and the current-type instability sensor outputs a current signal.

[0038] Preferably, the digital isolator 5 is selected from any one of an optical coupler, a capacitive coupler or an inductive coupler, and its main function is to receive the digital output signal of the control processor 4, and convert it into a sensor selection signal and send it to the sensor configuration circuit 1. Further preferably, the sensor selection signal can be a high level signal or a low level signal, and the digital isolator 5 generates a current type sensor selection signal (also a high level signal) when receiving the high level signal output by the control processor 4, and generates a voltage type sensor selection signal (also a low level signal) when receiving the low level signal output by the control processor 4. Due to the presence of the digital isolator 5, the sensor circuit and the control processing unit can be effectively isolated to prevent damage to the control processor 4, because the sensor and its related circuits may be interfered by the external environment or generate surge voltages, which may damage the control processor 4. In addition, the sensor and the control processor 4 may have different ground potentials, and the direct connection between the two may form a ground loop, introduce interference, and then affect the accuracy of the signal. Adding a digital isolator 5 can cut off the ground loop to avoid such interference. Finally, the addition of the digital isolator 5 can also prevent noise or interference in the sensor circuit from coupling to the control processor 4, thereby improving the stability and reliability of the entire system.

[0039] Preferably, when the digital isolator 5 is an optocoupler, the digital isolator includes a light emitting diode and a phototransistor, the first section of the light emitting diode is connected in series with the first end of the phototransistor, the second end of the light emitting diode is connected to the control processor 4, and the second end of the phototransistor is connected to the sensor configuration circuit 1. In this way, when the input signal is at a high level, the light emitting diode emits light and the phototransistor is turned on; when the input signal is at a low level, the light emitting diode is extinguished and the phototransistor is cut off. The conduction state of the phototransistor determines the high and low levels of the output signal, and the output signal can be pulled up or pulled down to the required level by an external resistor. Further preferably, a current limiting resistor can be connected in series between the control processor 4 and the light emitting diode to limit the current flowing through the light emitting diode and protect the light emitting diode from being damaged by overcurrent.

[0040] Preferably, Figure 2 As shown, the sensor configuration circuit 1 may include a first resistor R1, a second resistor R2, a third resistor R3 and a field effect transistor Q1, wherein:

[0041] A first end of the first resistor R1 is connected to different types of instability sensors, and a second end of the first resistor R1 is connected to the drain of the field effect transistor Q1 .

[0042] A first end of the second resistor R2 is connected to a first end of the first resistor R1 , and a second end of the second resistor R2 is connected to a first end of the third resistor R3 and a signal input end of the differential amplifier circuit 2 .

[0043] A second terminal of the third resistor R3 is grounded.

[0044] The source of the field effect transistor Q1 is grounded, and the gate of the field effect transistor Q1 is connected to the output end of the digital isolator 5 .

[0045] The above structure of the sensor configuration circuit 1 enables it to select a sensor based on the sensor selection signal (high or low level signal) input from the digital isolator 5 .

[0046] (1) Current sensor selection:

[0047] When the control processor 4 sends a high level signal to the digital isolator 5, the digital isolator 5 outputs a high level to drive the gate of the field effect transistor Q1. This turns on the field effect transistor Q1 and pulls the drain down to a level close to the ground potential. Since the other end of the first resistor R1 is connected to the drain of the field effect transistor Q1, the voltage across the first resistor R1 is close to zero, which is equivalent to being short-circuited.

[0048] At this time, the output current of the current-type instability sensor flows directly through the field effect tube to the ground, and generates a voltage drop proportional to the current (although very small) on the first resistor R1. This voltage drop is then divided by the second resistor R2 and the third resistor R3 and sent to the differential amplifier circuit 2. Therefore, when the field effect tube Q1 is turned on, the circuit is configured as a current-type sensor input mode.

[0049] (2) Voltage sensor selection:

[0050] When the control processor 4 sends a low level signal to the digital isolator 5, the digital isolator 5 outputs a low level to the gate of the field effect transistor Q1, which turns off the field effect transistor Q1, and at this time, the other end of the first resistor R1 (connected to the drain of the field effect transistor Q1) is suspended.

[0051] The output voltage of the voltage-type instability sensor is directly added between the first resistor R1 and the second resistor R2, and is sent to the differential amplifier circuit 2 after voltage division. Because the field effect tube Q1 is cut off and no current flows, it will not affect the output of the voltage-type instability sensor. Therefore, when the field effect tube Q1 is cut off, the circuit is configured as a voltage-type sensor input mode.

[0052] From the above, it can be seen that the structure of the sensor configuration circuit 1 and its connection relationship with other circuit parts in this application determine that it can realize the selection of sensor voltage and current signals, thereby achieving the purpose of compatibility with different sensors.

[0053] Preferably, Figure 3 As shown, the compatible sensor signal acquisition circuit of this embodiment also includes a surge protector 6. The surge protector 6 is connected to the input end of the external instability sensor signal, and its function is to protect the acquisition circuit from damage by external surge voltage. Surge voltage refers to the peak voltage that appears briefly in the circuit, which may be caused by lightning strikes, power supply fluctuations or other electrical interference. Surge voltage may damage the acquisition device or affect its measurement accuracy. The surge protector can absorb or suppress these surge voltages, thereby protecting the acquisition circuit and ensuring the reliable operation of the system.

[0054] Further preferably, the surge protector 6 can be selected from a combination of one or more devices selected from TVS diodes, varistors, and gas discharge tubes, that is, the surge protector 6 can be selected from any one of TVS diodes, varistors, and gas discharge tubes, or can be implemented in a form similar to a combination of TVS diodes and gas discharge tubes.

[0055] Preferably, the differential amplifier circuit 2 uses an operational amplifier chip of model AD8606, which has the characteristics of high precision, high speed and low noise. Figure 4As shown, the input IN+ and IN- are differential input signals, and OUT is the output signal. By selecting appropriate resistor values, the gain and common-mode rejection ratio of the circuit can be set.

[0056] Of course, in addition to various operational amplifier chips, instrument amplifiers or differential amplifier circuits built with discrete transistors and other components can also be used. In practical applications, filter capacitors can be added to suppress noise, or protection circuits can be added to prevent overvoltage or overcurrent.

[0057] Preferably, the signal conversion circuit 3 is an analog-to-digital converter, which is used to convert the sensor analog signal into a sensor digital signal and output the sensor digital signal to the control processor 4 .

[0058] Preferably, the control processor 4 is selected from any one of a single chip microcomputer, an embedded processor, an FPGA or a PLC.

[0059] It can be seen from the above technical solution that the present application provides a compatible sensor signal acquisition circuit. By introducing a digital isolator and a sensor configuration circuit, the voltage signal and the current signal can be selected, thereby achieving compatibility with different types of sensors. Then, when the vehicle is equipped with both a current-type instability sensor and a voltage-type instability sensor, the instability warning and alarm function when the bogie is lateral instability can also be achieved. Moreover, the present application can share the differential amplifier circuit and the signal conversion circuit, thereby facilitating the unified diagnostic algorithm and solving the problem of the difficulty in comparing and analyzing the instability states of different types of instability sensors on multiple vehicles. Finally, the present application uses field effect transistors to realize signal selection. The switch selection action of the field effect transistor is reliable, the structure is simple, the cost is low, and the reliability is high.

[0060] like Figure 5 The figure is a flow chart of a signal processing method of a compatible sensor signal acquisition circuit provided in an embodiment of the present application. The method is executed by the compatible sensor signal acquisition circuit as described above. The method comprises the following steps:

[0061] Step S501: receiving an analog input signal from a current-type instability sensor or a voltage-type instability sensor.

[0062] This step is performed by the sensor configuration circuit in the compatible sensor signal acquisition circuit. For the current type instability sensor, the analog input signal is a current signal, and for the voltage type instability sensor, the analog input signal is a voltage signal.

[0063] Preferably, when this step is performed, a surge protector is also used to protect the circuit from the impact of surge voltage, thereby improving the reliability of the circuit.

[0064] Step S502: According to the type of the current-type instability sensor or the voltage-type instability sensor, a digital signal is output to a digital isolator through a control processor, and the digital isolator generates a sensor selection signal according to the digital signal and sends it to a sensor configuration circuit.

[0065] When the current-type instability sensor or the voltage-type instability sensor is powered on, the signal conversion circuit determines the high and low level states of the sensor selection signal according to the power-on signal of the sensor, and then feeds back the high and low level states of the sensor selection signal to the control processor, so that the control processor can know whether the input is a current-type instability sensor or a voltage-type instability sensor. Further, the control processor can output the corresponding digital quantity signal to the digital isolator according to the feedback, and then the digital isolator generates a sensor selection signal according to the digital quantity signal and sends it to the sensor configuration circuit.

[0066] Preferably, in addition to using the signal conversion circuit to perform sensor power-on detection, the control processor can also determine which type of sensor is currently used according to a preset logic, and then output a corresponding digital signal to the digital isolator.

[0067] Step S503: the sensor configuration circuit selects and connects to the analog input signal sent by the corresponding current type sensor or voltage type sensor according to the sensor selection signal, and converts the analog input signal into a secondary sensor signal.

[0068] As can be seen from the above, the sensor configuration circuit includes a first resistor, a second resistor, a third resistor and a field effect tube. When the sensor selection signal is at a high level, the field effect tube is turned on, and the first resistor converts the current signal into a voltage signal. The second and third resistors form a voltage divider circuit to adjust the voltage signal and output a secondary sensor signal (voltage signal). When the sensor selection signal is at a low level, the field effect tube is cut off, and the voltage signal of the voltage type sensor is directly adjusted through the voltage divider circuit formed by the second and third resistors, and the secondary sensor signal (voltage signal) is output.

[0069] Step S504: input the secondary sensor signal into a differential amplifier circuit for amplification processing to obtain a tertiary sensor signal.

[0070] This step is to amplify the secondary sensor signal (voltage signal) output by the sensor configuration circuit to increase the signal strength for subsequent processing.

[0071] Step S505: input the three-level sensor signal into the signal conversion circuit for analog-to-digital conversion to obtain a sensor digital signal.

[0072] This step is to convert the amplified analog signal (tertiary sensor signal) into a digital signal for processing by the control processor.

[0073] Step S506: Input the sensor digital signal to the control processor for data processing and instability warning alarm diagnosis.

[0074] The control processor receives the digital signal from the sensor, processes and analyzes the data, determines whether the vehicle is unstable, and performs corresponding early warning and alarm diagnosis.

[0075] It can be seen from the above technical solution that the present application provides a signal processing method for a compatible sensor signal acquisition circuit. By introducing a digital isolator and a sensor configuration circuit, the voltage signal and the current signal can be selected, thereby achieving compatibility with different types of sensors. Then, when the vehicle is equipped with both a current-type instability sensor and a voltage-type instability sensor, the instability warning and alarm function when the bogie is laterally unstable can also be achieved. Moreover, the present application can share a differential amplifier circuit and a signal conversion circuit, thereby facilitating a unified diagnostic algorithm and solving the problem of difficult comparative analysis of the instability states of different types of instability sensors for multiple vehicles. Finally, the present application uses a field effect tube to realize signal selection. The switch selection action of the field effect tube is reliable, the structure is simple, the cost is low, and the reliability is high.

[0076] An embodiment of the present invention further provides an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the above method is implemented when the processor executes the program.

[0077] An embodiment of the present invention further provides a computer program product, including a computer program / instruction, which implements the steps of the above method when the computer program / instruction is executed by a processor.

[0078] An embodiment of the present invention further provides a computer-readable storage medium, which stores a computer program for executing the above method.

[0079] like Figure 6 As shown, the electronic device 600 may further include: a communication module 110, an input unit 120, an audio processor 130, a display 160, and a power supply 170. It is worth noting that the electronic device 600 does not necessarily have to include Figure 6 In addition, the electronic device 600 may also include Figure 6 For components not shown, reference may be made to the prior art.

[0080] like Figure 6 As shown, the central processor 100 is sometimes also referred to as a controller or an operation control, and may include a microprocessor or other processor devices and / or logic devices. The central processor 100 receives inputs and controls the operations of various components of the electronic device 600.

[0081] The memory 140 may be, for example, one or more of a cache, a flash memory, a hard drive, a removable medium, a volatile memory, a non-volatile memory or other suitable devices. The above-mentioned information related to the failure may be stored, and a program for executing the relevant information may also be stored. The CPU 100 may execute the program stored in the memory 140 to implement information storage or processing.

[0082] The input unit 120 provides input to the CPU 100. The input unit 120 is, for example, a key or a touch input device. The power supply 170 is used to provide power to the electronic device 600. The display 160 is used to display display objects such as images and text. The display may be, for example, an LCD display, but is not limited thereto.

[0083] The memory 140 may be a solid-state memory, such as a read-only memory (ROM), a random access memory (RAM), a SIM card, etc. It may also be a memory that saves information even when the power is off, can be selectively erased, and is provided with more data, examples of which are sometimes referred to as EPROMs, etc. The memory 140 may also be some other type of device. The memory 140 includes a buffer memory 141 (sometimes referred to as a buffer). The memory 140 may include an application / function storage unit 142, which is used to store application programs and function programs or processes for executing the operation of the electronic device 600 through the central processor 100.

[0084] The memory 140 may also include a data storage unit 143 for storing data, such as contacts, digital data, pictures, sounds, and / or any other data used by the electronic device. The driver storage unit 144 of the memory 140 may include various drivers for communication functions of the electronic device and / or for executing other functions of the electronic device (such as messaging applications, address book applications, etc.).

[0085] The communication module 110 is a transmitter / receiver that transmits and receives signals via the antenna 111. The communication module (transmitter / receiver) is coupled to the central processor 100 to provide input signals and receive output signals, which may be the same as the case of a conventional mobile communication terminal.

[0086] Based on different communication technologies, multiple communication modules 110 may be provided in the same electronic device, such as a cellular network module, a Bluetooth module and / or a wireless local area network module, etc. The communication module (transmitter / receiver) is also coupled to a speaker 131 and a microphone 132 via an audio processor 130 to provide an audio output via the speaker 131 and receive an audio input from the microphone 132, thereby realizing a common telecommunication function. The audio processor 130 may include any suitable buffer, decoder, amplifier, etc. In addition, the audio processor 130 is also coupled to the central processor 100, so that recording can be performed on the local machine through the microphone 132, and the sound stored on the local machine can be played through the speaker 131.

[0087] Those skilled in the art will appreciate that embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0088] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0089] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0090] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0091] The present invention uses specific embodiments to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A compatible sensor signal acquisition circuit, characterized in that: include: A sensor configuration circuit, a differential amplifier circuit, a signal conversion circuit, a control processor and a digital isolator, wherein the digital isolator is connected to the sensor configuration circuit and the control processor respectively, the differential amplifier circuit is connected to the sensor configuration circuit and the signal conversion circuit respectively, the control processor is also connected to the signal conversion circuit, and the sensor configuration circuit is connected to different types of instability sensors.

2. The compatible sensor signal acquisition circuit according to claim 1, characterized in that: The different types of instability sensors include voltage-type instability sensors and current-type instability sensors.

3. The compatible sensor signal acquisition circuit according to claim 1, characterized in that: The digital isolator is selected from any one of an optical coupler, a capacitive coupler or an inductive coupler.

4. The compatible sensor signal acquisition circuit as claimed in claim 3, characterized in that: When the digital isolator is an optocoupler, the digital isolator includes a light emitting diode and a phototransistor, the light emitting diode and the phototransistor are connected in series, the other end of the light emitting diode is connected to the control processor, and the other end of the phototransistor is connected to the sensor configuration circuit.

5. The compatible sensor signal acquisition circuit according to claim 1, characterized in that: The sensor configuration circuit includes a first resistor, a second resistor, a third resistor, and a field effect transistor, wherein: The first end of the first resistor is connected to different types of instability sensors, and the second end is connected to the drain of the field effect tube; The first end of the second resistor is connected to the first end of the first resistor, and the second end of the second resistor is connected to the first end of the third resistor and the signal input end of the differential amplifier circuit; The second end of the third resistor is grounded; The source of the field effect tube is grounded, and the gate of the field effect tube is connected to the output end of the digital isolator.

6. The compatible sensor signal acquisition circuit according to claim 1, characterized in that: A surge protector is also included, and the surge protector is connected to the output end of the instability sensor.

7. A signal processing method for a compatible sensor signal acquisition circuit, characterized in that: The method is performed by the compatible sensor signal acquisition circuit according to any one of claims 1 to 6, and the method comprises: Receiving an analog input signal from a current type instability sensor or a voltage type instability sensor; According to the type of the current-type instability sensor or the voltage-type instability sensor, a digital quantity signal is output to a digital isolator through a control processor, and the digital isolator generates a sensor selection signal according to the digital quantity signal and sends it to a sensor configuration circuit; The sensor configuration circuit selects and accesses the analog input signal emitted by the corresponding current-type instability sensor or voltage-type instability sensor according to the sensor selection signal, and converts the analog input signal into a secondary sensor signal; Inputting the secondary sensor signal into a differential amplifier circuit for amplification processing to obtain a tertiary sensor signal; Inputting the three-level sensor signal into the signal conversion circuit for analog-to-digital conversion to obtain a sensor digital signal; The sensor digital signal is input into the control processor for data processing and instability early warning alarm diagnosis.

8. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, the steps of the method according to claim 7 are implemented.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to claim 7 are implemented.

10. A computer program product comprising a computer program / instructions, characterized in that When the computer program / instructions are executed by a processor, the steps of the method of claim 7 are implemented.

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