Signal acquisition device, equipment and mobile carrier

Abstract

The embodiment of the invention provides a signal acquisition device, equipment and a mobile carrier, and belongs to the technical field of signal acquisition, the signal acquisition device comprises a power supply and communication module, the power supply and communication module is connected with an upper computer through a bus, and the bus is used for transmitting power supply current and a control signal; the code receiving and transmitting module is connected with the power supply and communication module; the signal acquisition module is used for determining the operation state of an external sensor and sending the operation state to the power supply and communication module; the power supply and communication module uploads the operation state to the upper computer through a bus. According to the signal acquisition device provided by the embodiment of the invention, common transmission of electric power and signals between the upper computer and the signal acquisition device is realized through the bus, and reliable interaction between an external sensor and the upper computer is realized, so that the use of a junction box and a signal line in a signal acquisition system is reduced, repeated wiring in the same area is avoided, and the reliability of the signal acquisition system is improved. And the power consumption of the equipment is reduced, so that the junction boxes are more concentrated and fewer.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of signal acquisition, and in particular to a signal acquisition device, equipment and mobile carrier. BACKGROUND

[0002] Currently, the sensor signals to be collected on a ship include various types, and different types of sensors transmit signals to a junction box through cables, and then transmit the sensor signals to a superior device. With this collection method, repeated wiring is required in the same area, the equipment has high power consumption, and the number of box bodies is large and scattered. SUMMARY

[0003] Embodiments of the present application provide a signal acquisition device, equipment and mobile carrier to solve the above technical problems.

[0004] In a first aspect, embodiments of the present application provide a signal acquisition device, comprising:

[0005] A power supply and communication module is connected to an upper computer through a bus, and is configured to transmit a power supply current and a control signal through the bus;

[0006] A transceiving code module is connected to the power supply and communication module, and is configured to obtain the control signal issued by the upper computer;

[0007] A signal acquisition module is configured to be connected to an external sensor to obtain an operating parameter of the external sensor, and is further connected to the transceiving code module, and is configured to determine an operating state of the external sensor based on the operating parameter, and transmit the operating state to the power supply and communication module through the transceiving code module.

[0008] The power supply and communication module is further configured to upload the operating state to the upper computer through the bus.

[0009] In combination with the first aspect, the signal acquisition module comprises a collection chip and a voltage follower unit, and the voltage follower unit is connected to the collection chip and the external sensor respectively.

[0010] The voltage follower unit comprises a third resistor and an operational amplifier, the third resistor is connected to the positive input terminal of the operational amplifier, the third resistor is configured to be connected to the external sensor, and the output terminal of the operational amplifier is connected to the collection chip.

[0011] In combination with the first aspect, the signal acquisition module comprises a collection chip, a voltage follower unit and a voltage division unit, and the voltage follower unit and the voltage division unit are connected to the collection chip and the external sensor respectively.

[0012] The voltage follower unit comprises a third resistor and an operational amplifier, the third resistor is connected to the non-inverting input terminal of the operational amplifier, the third resistor is used to be connected with the first connection terminal of the external sensor, and the output terminal of the operational amplifier is connected with the first collection terminal of the collection chip; the inverting input terminal of the operational amplifier is connected with the output terminal of the operational amplifier;

[0013] The voltage division unit comprises a first resistor and a second resistor, one end of the first resistor is used to connect the second connection terminal of the external sensor, and the other end of the first resistor is used to connect the second resistor and the second collection terminal of the collection chip.

[0014] With reference to the first aspect, the transceiver code module comprises a code receiving unit, the code receiving unit comprises a second triode, a fifth capacitor, a fifth resistor, a sixth resistor, an eighth capacitor and a ninth resistor, the base of the second triode is connected with the bus through the fifth resistor and the fifth capacitor in series, the base of the second triode is also grounded through the eighth capacitor, the emitter of the second triode is connected with a 3.3V voltage, the collector of the second triode is grounded through the ninth resistor, the sixth resistor is connected between the emitter and the base of the second triode, and the collector of the second triode is configured as a code receiving terminal.

[0015] With reference to the first aspect, the transceiver code module further comprises a code sending output unit, the code sending output unit comprises a first triode, a fourth resistor, a seventh resistor, a tenth resistor and an eleventh resistor, the collector of the first triode is connected with the bus through the seventh resistor, the emitter of the first triode is grounded through the tenth resistor, the base of the first triode is grounded through the eleventh resistor, one end of the fourth resistor is connected with the base of the first triode, and the other end of the fourth resistor is configured as a code sending output terminal.

[0016] With reference to the first aspect, the power conversion module is further connected with the power supply and communication module and the signal collection module, and is used to convert the power supply current into a current suitable for the signal collection module.

[0017] With reference to the first aspect, the sensor power supply module is further connected with the power supply and communication module, and is used to convert the power supply current into a driving current to drive an external sensor connected with the sensor power supply module.

[0018] With reference to the first aspect, the bus input port and the bus output port are further connected with the bus, and the power supply and communication module is connected with the bus through the bus input port and the bus output port respectively.

[0019] In combination with the first aspect, a first electronic switch is connected to the bus input port, and is configured to be disconnected in the event of a failure of the bus on the side of the bus input port.

[0020] In combination with the first aspect, a second electronic switch is connected to the bus output port, and is configured to be disconnected in the event of a failure of the bus on the side of the bus output port.

[0021] In the second aspect, an embodiment of the present application provides a signal acquisition device, comprising a circuit board and a first bus input port, a second bus input port, a first bus output port, a second bus output port, a first power supply connection port, a second power supply connection port, a signal acquisition port, a first passive contact port, a second passive contact port and the signal acquisition device as described in any one of the first aspect.

[0022] The first bus input port and the second bus input port are connected to the bus input port in the signal acquisition device, and the first bus output port and the second bus output port are connected to the bus output port in the signal acquisition device; the first power supply connection port, the second power supply connection port and the signal acquisition port are used to connect an external sensor.

[0023] In the third aspect, an embodiment of the present application provides a mobile carrier, comprising a host computer, a sensor and the signal acquisition device as described in any one of the first aspect, the host computer is connected to the signal acquisition device through a bus, the signal acquisition device is connected to the sensor, the host computer communicates with the signal acquisition device through the bus and acquires the working state of the sensor.

[0024] One of the above technical solutions has the following advantages or beneficial effects:

[0025] The signal acquisition device provided in the embodiment of the application comprises: a power supply and communication module, the power supply and communication module is connected with an upper computer through a bus, the bus is used for conveying power supply current and control signals, and the power supply and communication module is configured to transmit the power supply current and the control signals; a transceiver code module, the transceiver code module is connected with the power supply and communication module, and the transceiver code module is used for acquiring the control signals; and a signal acquisition module, the signal acquisition module is used for being connected with external sensors to acquire operating parameters of the external sensors, the signal acquisition module is also connected with the transceiver code module, the signal acquisition module is configured to determine operating states of the external sensors based on the operating parameters, and the operating states are transmitted to the power supply and communication module through the transceiver code module; and the power supply and communication module uploads the operating states to the upper computer through the bus. The signal acquisition device provided in the embodiment of the application realizes common transmission of power and signals between the upper computer and the signal acquisition device through the bus, realizes reliable interaction between the external sensors and the upper computer, thereby reducing the use of junction boxes and signal lines in the signal acquisition system, avoiding repeated wiring in the same area, reducing the power consumption of the signal acquisition system, and making the signal acquisition box more concentrated and the number of junction boxes less. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can also be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0027] In order to more completely understand the application and its beneficial effects, the following will be described in conjunction with the drawings, wherein the same reference numerals in the following description represent the same parts.

[0028] Figure 1 The module connection schematic diagram of the signal acquisition device provided in the embodiment of the application is shown in the figure.

[0029] Figure 2 The circuit connection schematic diagram of the signal acquisition module provided in the first embodiment of the application is shown in the figure.

[0030] Figure 3 The circuit connection schematic diagram of the signal acquisition module provided in the second embodiment of the application is shown in the figure.

[0031] Figure 4 The circuit connection schematic diagram of the transceiver code module provided in the embodiment of the application is shown in the figure.

[0032] Figure 5 The connection schematic diagram of the signal acquisition device provided in the embodiment of the application is shown in the figure.

[0033] Figure 6This is a schematic diagram of the circuit board of the signal acquisition device provided in the embodiments of this application.

[0034] Explanation of reference numerals in the attached figures:

[0035] 100 - Signal acquisition device; 110 - Signal acquisition unit; 121 - First bus input terminal; 122 - Second bus input terminal; 123 - First bus output terminal; 124 - Second bus output terminal; 125 - First power supply connection terminal; 126 - Second power supply connection terminal; 127 - Signal acquisition terminal; 128 - First passive contact terminal; 129 - Second passive contact terminal; 200 - Positive bus; 300 - Negative bus; 400 - Switching sensor; 500 - Analog sensor. Detailed Implementation

[0036] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0037] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0038] In the embodiments of this application, "at least one" refers to one or more; "multiple" refers to two or more. In the description of this application, the terms "first," "second," "third," etc., are used only for the purpose of distinguishing descriptions and should not be construed as indicating or implying relative importance, nor should they be construed as indicating or implying order.

[0039] References such as “one embodiment” or “some embodiments” as described in this specification mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the terms “comprising,” “including,” “having,” and variations thereof, as used in this specification, mean “including, but not limited to,” unless otherwise specifically emphasized.

[0040] It should be noted that in the embodiments of this application, "and / or" describes the relationship between associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. In addition, the character " / ", unless otherwise specified, generally indicates that the associated objects before and after it are in an "or" relationship.

[0041] It should be noted that in the embodiments of this application, "connection" can be understood as electrical connection. The connection between two electrical components can be a direct or indirect connection between the two electrical components. For example, the connection between A and B can be a direct connection between A and B, or an indirect connection between A and B through one or more other electrical components.

[0042] The specific implementation methods of this application are illustrated below through examples:

[0043] like Figure 1 As shown in the figure, this application embodiment provides a signal acquisition device, including: a power supply and communication module, which is connected to a host computer via a bus. The bus is used to transmit power supply current and control signals, and the power supply and communication module is configured to transmit power supply current and control signals; a transceiver module, which is connected to the power supply and communication module and is used to acquire control signals; and a signal acquisition module, which is used to connect to an external sensor to acquire the operating parameters of the external sensor. The signal acquisition module is also connected to the transceiver module and is configured to determine the operating status of the external sensor based on the operating parameters and send the operating status to the power supply and communication module via the transceiver module; wherein, the power supply and communication module uploads the operating status to the host computer via the bus.

[0044] In this embodiment of the application, specifically, the signal is integrated onto the bus based on power line carrier technology. Power line carrier technology (PLC), also known as power line communication, is a communication technology that uses an existing bus as a transmission medium and achieves high-speed transmission of data or signals through carrier modulation.

[0045] In this embodiment, the bus includes a positive bus and a negative bus, and the power supply and communication module is connected to the positive bus and the negative bus. The power supply and communication module, as a centralized power conversion point, distributes the power from the bus to each module through different ports for their use. Simultaneously, the power supply and communication module is also used to acquire signals transmitted on the bus and forward the signals to the transceiver module.

[0046] In this embodiment, the transceiver module is used to encode, transmit, receive, and decode signals between the power supply and communication module and the signal acquisition module, ensuring reliable and efficient transmission between them. The signal acquisition module acquires operating parameters from external sensors, including voltage, current, and contact signals. Based on the acquired voltage, current, and contact signals, the signal acquisition module analyzes the data and determines the operating status of the external sensors according to pre-set alarm thresholds. The signal acquisition module transmits the operating status of the external sensors to the transceiver module in the form of current pulses, and then transmits the signal carrier to the positive and negative buses through the transceiver module's output terminal. The host computer obtains the operating status of the external sensors through the positive and negative buses and issues corresponding instructions.

[0047] It is worth noting that the host computer generates control commands based on the corresponding indications and transmits them to the power supply and communication module through the positive and negative busbars. The power supply and communication module then sends the control commands to the transceiver module. After processing the control commands, the transceiver module sends the information to the signal acquisition module for parsing.

[0048] It is understood that the signal acquisition device provided in this application embodiment uses a bus as the signal transmission medium based on power line carrier communication technology to realize the common transmission of power and signals between the host computer and the signal acquisition device, thereby reducing the use of junction boxes and signal lines in the signal acquisition system, avoiding redundant wiring in the same area, reducing the power consumption of the signal acquisition system, and making the signal acquisition boxes more concentrated and the number of junction boxes less.

[0049] like Figure 1 and Figure 2 As shown in this embodiment, the signal acquisition module includes an acquisition chip U1 and a voltage follower unit. The voltage follower unit is connected to the acquisition chip U1 and an external sensor. The voltage follower unit includes a third resistor R3 and an operational amplifier AR1. The third resistor R3 is connected to the non-inverting input terminal IN+ of the operational amplifier AR1 and is used to connect to the external sensor. The output terminal OUT of the operational amplifier AR1 is connected to the acquisition chip U1. Specifically, the operational amplifier AR1 is used to establish a voltage follower relationship between the output voltage and the input voltage, i.e., the voltage gain is always 1. The operational amplifier AR1 has the characteristics of high input impedance and low output impedance. Therefore, the operational amplifier AR1 also plays a role in signal buffering, isolation, and impedance matching. It is worth noting that the voltage follower unit also includes a second capacitor C2 and a fourth capacitor C4. The positive power supply terminal V+ of the operational amplifier AR1 is grounded through the second capacitor C2, and the fourth capacitor C4 is connected to the output terminal OUT and the negative power supply terminal V- of the operational amplifier AR1. The negative power supply terminal V- of the operational amplifier AR1 is grounded.

[0050] likeFigure 2 As shown in this embodiment, the signal acquisition module further includes a first filtering unit, which includes a third capacitor C3 and a second suppression diode VD2. The third capacitor C3, the third resistor R3, and the second suppression diode VD2 are connected in parallel, with one end of the parallel connection connected to the third port of connector J1 and the other end grounded. It should be noted that connector J1 has a first port and a third port. The first port is used to connect the operating power supply and the first connection terminal of the external sensor, respectively, while the third port is used to connect the second connection terminal of the external sensor. The external sensor sends operating parameters to the voltage follower unit through the third port. The voltage follower unit converts the operating parameters and inputs them into the acquisition chip U1. The acquisition chip U1 determines the operating status of the external sensor based on the operating parameters.

[0051] In this embodiment of the application, taking a switch sensor as an example, if the current of the switch sensor is I, it is converted into voltage through the third resistor R3. Since the resistance value of the third resistor R3 is known, according to Ohm's law U=IR, after passing through the operational amplifier, the voltage is input to the acquisition chip U1. The acquisition chip U1 analyzes and judges the working state of the switch sensor according to the preset voltage threshold. When the switch sensor malfunctions, the current is greater than 0mA and less than or equal to 1mA. At this time, the voltage of the third resistor R3 is very small. Based on this current range, the first voltage threshold range can be obtained. When the voltage obtained by the acquisition chip U1 is within the first voltage threshold range, it can be determined that the switch sensor has malfunctioned. When the switch sensor is working normally, the current is greater than 1mA and less than 3mA. The second voltage threshold range is calculated based on the resistance value of the third resistor R3. When the voltage obtained by the acquisition chip U1 is within the second voltage threshold range, it can be determined that the switch sensor is working normally. When the switch sensor alarms, the current is greater than 3mA and less than 5mA. The third voltage threshold range is calculated based on the resistance value of the third resistor R3. When the voltage obtained by the acquisition chip U1 is within the third voltage threshold range, it can be determined that the switch sensor is in an alarm state.

[0052] Understandably, the operating status of the switch sensor can be monitored through the set acquisition chip U1 and voltage follower unit, and with the support of power line carrier communication technology, power and signal transmission can be realized between the host computer and the signal acquisition device.

[0053] like Figure 1 and Figure 3As shown in this embodiment, the signal acquisition module includes an acquisition chip U1, a voltage follower unit, and a voltage divider unit. Both the voltage follower unit and the voltage divider unit are connected to the acquisition chip U1 and an external sensor, respectively. The voltage follower unit includes a third resistor R3 and an operational amplifier AR1. The third resistor R3 is connected to the non-inverting input terminal IN+ of the operational amplifier AR3 and is used to connect to the first connection terminal of the external sensor. The output terminal OUT of the operational amplifier AR1 is connected to the first acquisition terminal ADC1 of the acquisition chip U1. The negative inverting input terminal IN- of the operational amplifier AR1 is connected to the output terminal OUT of the operational amplifier AR1. The voltage divider unit includes a first resistor R1 and a second resistor R2. One end of the first resistor R1 is used to connect to the second connection terminal of the external sensor, and the other end of the first resistor R1 is used to connect the second resistor R2 and the second acquisition terminal ADC0 of the acquisition chip U1. Specifically, the voltage follower unit also includes a second capacitor C2 and a fourth capacitor C4. The positive power supply terminal V+ of the operational amplifier AR1 is grounded through the second capacitor C2, and the fourth capacitor C4 is connected to the output terminal OUT and the negative power supply terminal V- of the operational amplifier AR1. The negative power supply terminal V- of the operational amplifier AR1 is grounded.

[0054] like Figure 3 As shown in the embodiment of this application, the signal acquisition module further includes a first filtering unit. The first filtering unit includes a third capacitor C3 and a second suppression diode VD2. The third capacitor C3, the third resistor R3, and the second suppression diode VD2 are connected in parallel, and one end of the three connected in parallel is connected to the third port of connector J1, and the other end is grounded.

[0055] like Figure 3 As shown in the embodiment of this application, the voltage divider unit further includes a second filter unit. The second filter unit includes a first capacitor C1 and a first suppression diode VD1. The first capacitor C1, the second resistor R2, and the first suppression diode VD1 are connected in parallel, with one end of the parallel connection connected to the first resistor R1 and the other end grounded. It is worth noting that both the first suppression diode VD1 and the second suppression diode VD2 include TVS (Transient Voltage Suppressor) diodes.

[0056] It should be noted that connector J1 has a first port, a second port, and a third port. The first port is used to connect the operating power supply and the first connection terminal of the external sensor. The second port is used to connect the first resistor R1 and the third connection terminal of the external sensor. The third port is used to connect the second connection terminal of the external sensor. The external sensor sends its operating parameters to the voltage follower unit through the third port, and the voltage follower unit converts the operating parameters. Simultaneously, the external sensor sends its operating parameters to the voltage divider unit through the second port. The acquisition chip U1 obtains the operating parameters from the voltage follower unit and the voltage divider unit and determines the operating status of the external sensor.

[0057] In this embodiment, taking an analog sensor as an example, if the current of the analog sensor is I, it is converted into voltage through the third resistor R3. Since the resistance value of the third resistor R3 is known, according to Ohm's law U = IR, the voltage is input to the acquisition chip U1 after passing through an operational amplifier. The acquisition chip U1 analyzes and determines the working state of the analog sensor based on a preset voltage threshold. When the analog sensor malfunctions, the current is 0mA. When the current acquired by the acquisition chip U1 is 0mA, it can be determined that the analog sensor has malfunctioned. When the analog sensor is working normally, the current is greater than 2mA and less than 4mA. When the current acquired by the acquisition chip U1 is between 2mA and 4mA, it can be determined that the analog sensor is working normally. When the analog sensor alarms, different current thresholds are set according to different analog sensors. When the current acquired by the acquisition chip U1 meets the conditions limited by the current threshold, it is determined that the analog sensor is in an alarm state.

[0058] In this embodiment, the highest voltage of the signal acquisition module is 3.3V. Taking a temperature sensor as an example, when the ambient temperature ranges from -50℃ to 100℃, the voltage input to the signal acquisition module is 0-5V, which is greater than the maximum measurable voltage of the signal acquisition module. Therefore, the input voltage signal is divided by a voltage divider unit, resulting in a voltage of 0-2.5V. By acquiring the variable voltage signal in real time through the acquisition chip U1, the state value of the temperature sensor can be determined, thereby obtaining the ambient temperature. For example, when the ambient temperature is 25℃, the actual output voltage of the temperature sensor is 2.5V, while the voltage acquired by the acquisition chip U1 is 1.25V.

[0059] It should be noted that the signal acquisition module also includes an ADC (Analog-to-Digital Converter) module. The voltage follower unit and the voltage divider unit are connected to the acquisition chip U1 through the ADC module. The ADC module converts the analog voltage signals transmitted by the voltage follower unit and the voltage divider unit into digital values ​​for the acquisition chip U1 to read.

[0060] Understandably, the operating status of the analog sensor can be monitored through the set acquisition chip U1, voltage follower unit, and voltage divider unit, and with the support of power line carrier communication technology, the common transmission of power and signal between the host computer and the signal acquisition device can be realized.

[0061] like Figure 4 As shown in this embodiment, the transceiver module includes a code return receiving unit and a code transmission output unit, with the code return receiving unit connected to the code transmission output unit. The code transmission output unit includes a first transistor V1, a fourth resistor R4, a seventh resistor R7, a tenth resistor R10, and an eleventh resistor R11. The collector of the first transistor V1 is connected to the bus through the seventh resistor R7, the emitter of the first transistor V1 is grounded through the tenth resistor R10, and the base of the first transistor V1 is grounded through the eleventh resistor R11. One end of the fourth resistor R4 is connected to the base of the first transistor V1, and the other end of the fourth resistor R4 is configured as a code transmission output unit. The output terminal is COUT; the return code receiving unit includes a second transistor V2, a fifth capacitor C5, a fifth resistor R5, a sixth resistor R6, an eighth capacitor C8, and a ninth resistor R9. The base of the second transistor V2 is connected to the bus through the fifth resistor R5 and the fifth capacitor C5 connected in series. The base of the second transistor V2 is also grounded through the eighth capacitor C8. The emitter of the second transistor V2 is connected to a 3.3V voltage, and the collector of the second transistor V2 is grounded through the ninth resistor R9. The sixth resistor R6 is connected between the emitter and base of the second transistor V2. The collector of the second transistor V2 is configured as the return code receiving terminal INT. Specifically, the transceiver module is connected to the acquisition chip U1. The return code receiving terminal INT of the transceiver module receives the control commands transmitted by the bus and converts the control commands into TTL level signals. The acquisition chip U1 parses the address, command, and other information according to the specified communication protocol, and the return code port of the acquisition chip U1 controls the return code circuit to generate a 20-30mA current pulse. The output terminal COUT is used to receive bus commands and output external sensor data signals after they are parsed by the acquisition chip U1.

[0062] like Figure 4 As shown, it's worth noting that under normal circumstances, high and low level pulses exist on the bus. When the signal acquisition module outputs a signal, the code output terminal COUT generates a pulse signal on the bus. At this time, the fifth capacitor C5 is short-circuited, and the first transistor V1 is turned on. Depending on the code return time, the pulse width varies, thus distinguishing whether the transmitted signal is a switching signal, an analog signal, or a sensor alarm signal. The code receiving terminal INT works on the same principle as the code output terminal COUT. When the host computer sends control commands or other signals, the code receiving terminal INT generates a pulse signal. At this time, the eighth capacitor C8 is short-circuited, and the second transistor V2 is turned on. The corresponding signal information can be deduced based on the pulse width.

[0063] Understandably, the transceiver module can process the control commands sent by the bus and send the processed commands or information to the signal acquisition module; at the same time, the transceiver module can also convert the operating parameters sent by the signal acquisition module into corresponding pulse signals, which can be sent to the host computer via the bus, thereby realizing the common transmission of power and signals between the host computer and the signal acquisition device.

[0064] like Figure 1 As shown in the embodiment of this application, a power conversion module is also included. The power conversion module connects the power supply and communication module and the signal acquisition module, and is used to convert the supply current into a current compatible with the signal acquisition module. Specifically, the voltage transmitted on the bus is usually relatively high, while the operating voltage required by the signal acquisition module is relatively low, making them incompatible. Therefore, the voltage on the bus cannot be directly applied to the signal acquisition module. The power conversion module converts the voltage transmitted from the power supply and communication module into a regulated power supply compatible with the signal acquisition module, ensuring the continuous and stable normal operation of the signal acquisition module.

[0065] Understandably, by setting up a power conversion module, the voltage on the bus is converted into a regulated power supply that can be used by the signal acquisition module.

[0066] like Figure 1 As shown in the embodiment of this application, a sensor power supply module is also included. This sensor power supply module is connected to the power supply and communication module and is used to convert the supply current into a drive current to drive an external sensor connected to it. Specifically, the sensor power supply module is a power management module customized for sensors to meet the low power consumption, high accuracy, and anti-interference requirements of different sensors. Typically, the sensor power supply module has a soft-start design to avoid the impact of the inrush current caused by the signal acquisition device at startup on the external sensor, thus protecting the sensor.

[0067] Understandably, once the CPU (i.e., U1) of the signal acquisition device is initialized, the sensor power supply module converts the power supply on the bus into the power supply required for the normal operation of the external sensor. At the same time, through the corresponding soft-start module, the impact of the inrush current caused by the start-up of the signal acquisition device on the external sensor is avoided.

[0068] like Figure 1As shown in the embodiment of this application, a bus input port and a bus output port are also included. The power supply and communication modules are connected to the bus through the bus input port and the bus output port, respectively. Specifically, the bus input port is connected to the positive bus and the negative bus, respectively, to acquire the power and signals transmitted by the host computer through the positive bus and the negative bus. The bus output port is connected to the positive bus and the negative bus, respectively, to load the corresponding signals onto the positive bus or the negative bus for transmission to the host computer.

[0069] It is understandable that the connection between the signal acquisition device and the bus is realized through the bus input port and the bus output port, realizing the acquisition of power and signal and the transmission of signal; thus realizing the common transmission of power and signal between the host computer and the signal acquisition device.

[0070] like Figure 1 As shown in this embodiment, a first electronic switch is also included. The first electronic switch is connected to the bus input port and is configured to disconnect in the event of a bus fault on the bus input port side. Specifically, the first electronic switch is located between the bus input port and the power supply and communication module. The first electronic switch has two operating states: on and off. When the positive and negative buses are working normally, the corresponding detection module in the signal acquisition module controls the first electronic switch to be in the on state; when an open circuit or short circuit occurs on the positive and negative buses, the detection module in the signal acquisition module controls the first electronic switch to be off to prevent the fault point from affecting the signal acquisition module, and simultaneously sends the location of the fault point to the host computer.

[0071] It is understandable that by setting the first electronic switch, the connection between the signal acquisition device and the bus can be disconnected when a bus fault occurs near the bus input port, thereby protecting the signal acquisition device.

[0072] like Figure 1 As shown in this embodiment, a second electronic switch is also included. The second electronic switch is connected to the bus output port and is configured to disconnect in case of a bus fault on the bus output port side. Specifically, the second electronic switch is located between the bus output port and the power supply and communication module. The second electronic switch has two operating states: on and off. When the positive and negative buses are operating normally, the corresponding detection module in the signal acquisition module controls the second electronic switch to be on. When an open circuit or short circuit occurs on the positive and negative buses, the detection module in the signal acquisition module controls the second electronic switch to be off to prevent the fault point from affecting the signal acquisition module, and simultaneously sends the fault location to the host computer.

[0073] It is understandable that by setting a second electronic switch, the connection between the signal acquisition device and the bus can be disconnected when a bus fault occurs near the bus output port, thereby protecting the signal acquisition device.

[0074] like Figure 5 As shown, this application embodiment also provides a signal acquisition device 100, including: a circuit board and a first bus input terminal 121, a second bus input terminal 122, a first bus output terminal 123, a second bus output terminal 124, a first power supply connection terminal 125, a second power supply connection terminal 126, a signal acquisition terminal 127, a first passive contact terminal 128, a second passive contact terminal 129, and a signal acquisition device 110 as provided in any of the above embodiments.

[0075] The first bus input terminal 121 and the second bus input terminal 122 are both connected to the bus input port of the signal acquisition device 110, and the first bus output terminal 123 and the second bus output terminal 124 are both connected to the bus output port of the signal acquisition device 110. The first power supply connection terminal 125, the second power supply connection terminal 126, and the signal acquisition terminal 127 are used to connect external sensors. Specifically, the signal acquisition device 110 is located in a circuit board, with the first bus input terminal 121, the second bus input terminal 122, the first bus output terminal 123, and the second bus output terminal 124 located on one side of the circuit board, and the first power supply connection terminal 125, the second power supply connection terminal 126, the signal acquisition terminal 127, the first passive contact terminal 128, and the second passive contact terminal 129 located on the other side of the circuit board. The external sensors include a digital sensor 400 and an analog sensor 500, wherein the digital sensor 400 sends a digital signal, and the analog sensor 500 sends an analog signal. Both types of signals have three operating states, and the fault operating states are consistent. The difference between the two types of signals is that the current of the digital signal changes instantaneously from the normal operating state to the alarm state, while the current of the analog signal changes slowly from the normal operating state to the alarm state. The normal operating current of the digital signal is 2mA, and the normal operating current of the analog signal is approximately 3mA. When the external sensor is a digital sensor 400 (such as a water immersion sensor and a door switch sensor), this type of sensor is a two-wire sensor. The first power supply connection terminal 125 and the second power supply connection terminal 126 are used to connect to the first connection terminal and the third connection terminal of the digital sensor 400, respectively. The first connection terminal is the positive terminal of the digital sensor 400, and the third connection terminal is the negative terminal of the digital sensor 400. When the external sensor is an analog sensor 500 (such as a temperature sensor or pressure sensor), this type of sensor is a three-wire sensor. The first power supply connection terminal 125, the second power supply connection terminal 126, and the signal acquisition terminal 127 are respectively used to connect to the first connection terminal, the third connection terminal, and the second connection terminal of the analog sensor 500. The first connection terminal is the positive terminal of the analog sensor 500, the third connection terminal is the negative terminal, and the second connection terminal is the signal acquisition terminal of the analog sensor 500. It should be noted that the first passive contact terminal 128 and the second passive contact terminal 129 can be used to connect relays or other external switching devices.

[0076] like Figure 6As shown, it is worth noting that the circuit board also has a first mounting hole 130 and a second mounting hole 140. The first mounting hole 130 is located between the signal acquisition device 110 and the signal acquisition terminal 127, and the second mounting hole 140 is located between the signal acquisition device 110 and the first bus output terminal 123. It should be noted that there is a distance X between the first mounting hole 130 and the second mounting hole 140, and the circuit board has a length Y and a width Z, where distance X = 32mm, length Y = 39mm, and width Z = 21mm. By using the first mounting hole 130 and the second mounting hole 140, the signal acquisition device 100 can be integrated into a sensor such as a water immersion sensor or a door switch sensor, thereby forming an integrated carrier sensor.

[0077] In this embodiment, the first bus input terminal 121, the second bus input terminal 122, the first bus output terminal 123, the second bus output terminal 124, the first power supply connection terminal 125, the second power supply connection terminal 126, the signal acquisition terminal 127, the first passive contact terminal 128, and the second passive contact terminal 129 all include pads disposed on the circuit board. The first bus input terminal 121, the second bus input terminal 122, the first bus output terminal 123, the second bus output terminal 124, the first power supply connection terminal 125, the second power supply connection terminal 126, the signal acquisition terminal 127, the first passive contact terminal 128, and the second passive contact terminal 129 are soldered to the port of the bus or an external sensor by means of soldering, thereby increasing the strength.

[0078] It is understood that the signal acquisition device 100 provided in this application embodiment integrates the signal acquisition device 100 with the sensor by setting the first mounting hole 130 and the second mounting hole 140, realizing the integrated design of the sensor and the signal acquisition device 100; at the same time, by setting the solder pads on the circuit board, the portability of the signal acquisition device 100 to the bus or sensor is improved.

[0079] This application provides a mobile vehicle, including: a host computer, sensors, and a signal acquisition device as provided in any of the above embodiments. The host computer is connected to the signal acquisition device via a bus, and the signal acquisition device is connected to the sensors. The host computer communicates with the signal acquisition device via the bus and acquires the operating status of the sensors. It is worth noting that the mobile vehicle provided in this application includes mobile passenger or cargo vehicles such as ships, automobiles, and aircraft.

[0080] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Although this application has disclosed preferred embodiments as above, it is not intended to limit this application. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the technical solution of this application. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. A signal acquisition device, characterized in that, include: A power supply and communication module, wherein the power supply and communication module is connected to a host computer via a bus, and the power supply and communication module is configured to transmit power supply current and control signals via the bus; A transceiver module, which is connected to the power supply and communication module, is used to acquire the control signal; A signal acquisition module is provided, which is used to connect with an external sensor to obtain the operating parameters of the external sensor. The signal acquisition module is also connected to the transceiver module. The signal acquisition module is configured to determine the operating status of the external sensor based on the operating parameters and send the operating status to the power supply and communication module through the transceiver module. The power supply and communication module is also configured to upload the operating status to the host computer via the bus.

2. The signal acquisition device according to claim 1, characterized in that, The signal acquisition module includes an acquisition chip and a voltage follower unit; the voltage follower unit is connected to the acquisition chip and the external sensor respectively. The voltage follower unit includes a third resistor and an operational amplifier. The third resistor is connected to the non-inverting input terminal of the operational amplifier and is used to connect to the external sensor. The output terminal of the operational amplifier is connected to the acquisition chip.

3. The signal acquisition device according to claim 1, characterized in that, The signal acquisition module includes an acquisition chip, a voltage follower unit, and a voltage divider unit; the voltage follower unit and the voltage divider unit are respectively connected to the acquisition chip and the external sensor. The voltage follower unit includes a third resistor and an operational amplifier. The third resistor is connected to the non-inverting input terminal of the operational amplifier and is used to connect to the first connection terminal of the external sensor. The output terminal of the operational amplifier is connected to the first acquisition terminal of the acquisition chip. The negative-inverting input terminal of the operational amplifier is connected to the output terminal of the operational amplifier. The voltage divider unit includes a first resistor and a second resistor. One end of the first resistor is used to connect to the second connection terminal of the external sensor, and the other end of the first resistor is used to connect the second resistor and the second acquisition terminal of the acquisition chip.

4. The signal acquisition device according to claim 1, characterized in that, The transceiver module includes a return code receiving unit, which includes a second transistor, a fifth capacitor, a fifth resistor, a sixth resistor, an eighth capacitor, and a ninth resistor. The base of the second transistor is connected to the bus through the fifth resistor and the fifth capacitor connected in series. The base of the second transistor is also grounded through the eighth capacitor. The emitter of the second transistor is connected to a 3.3V voltage. The collector of the second transistor is grounded through the ninth resistor. The sixth resistor is connected between the emitter and the base of the second transistor. The collector of the second transistor is configured as the return code receiving end.

5. The signal acquisition device according to claim 4, characterized in that, The transceiver module further includes a code output unit, which includes a first transistor, a fourth resistor, a seventh resistor, a tenth resistor, and an eleventh resistor. The collector of the first transistor is connected to the bus through the seventh resistor, the emitter of the first transistor is grounded through the tenth resistor, and the base of the first transistor is grounded through the eleventh resistor. One end of the fourth resistor is connected to the base of the first transistor, and the other end of the fourth resistor is configured as a code output terminal.

6. The signal acquisition device according to claim 1, characterized in that, It also includes a power conversion module, which is connected to the power supply and communication module and the signal acquisition module. The power conversion module is used to convert the power supply current into a current that is compatible with the signal acquisition module.

7. The signal acquisition device according to claim 1, characterized in that, It also includes a sensor power supply module, which is connected to the power supply and communication module. The sensor power supply module is used to convert the power supply current into a drive current to drive an external sensor connected to the sensor power supply module.

8. The signal acquisition device according to claim 1, characterized in that, It also includes a bus input port and a bus output port, and the power supply and communication module is connected to the bus through the bus input port and the bus output port, respectively.

9. The signal acquisition device according to claim 8, characterized in that, It also includes a first electronic switch connected to the bus input port, the first electronic switch being configured to disconnect in the event of a bus failure on the bus input port side.

10. The signal acquisition device according to claim 8, characterized in that, It also includes a second electronic switch connected to the bus output port, the second electronic switch being configured to disconnect in the event of a bus failure on the bus output port side.

11. A signal acquisition device, characterized in that, include: The circuit board and the first bus input terminal, second bus input terminal, first bus output terminal, second bus output terminal, first power supply connection terminal, second power supply connection terminal, signal acquisition terminal, first passive contact terminal, second passive contact terminal, and signal acquisition device as described in any one of claims 1-9 located on the circuit board; The first bus input terminal and the second bus input terminal are both connected to the bus input port in the signal acquisition device, and the first bus output terminal and the second bus output terminal are both connected to the bus output port in the signal acquisition device; the first power supply connection terminal, the second power supply connection terminal and the signal acquisition terminal are used to connect to external sensors.

12. A mobile vehicle, characterized in that, include: The system includes a host computer, a sensor, and a signal acquisition device as described in any one of claims 1-9. The host computer is connected to the signal acquisition device via a bus, and the signal acquisition device is connected to the sensor. The host computer communicates with the signal acquisition device via the bus and acquires the operating status of the sensor.

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