CN218938812U - Signal acquisition circuit, signal acquisition equipment and vehicle - Google Patents
Signal acquisition circuit, signal acquisition equipment and vehicle Download PDFInfo
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- CN218938812U CN218938812U CN202223396369.8U CN202223396369U CN218938812U CN 218938812 U CN218938812 U CN 218938812U CN 202223396369 U CN202223396369 U CN 202223396369U CN 218938812 U CN218938812 U CN 218938812U
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Abstract
The application discloses a signal acquisition circuit, signal acquisition equipment and vehicle. The signal acquisition circuit comprises a first signal acquisition module, a second signal acquisition module and a signal processing module; the input end of the first signal acquisition module is connected with the output end of the signal detection module, and the output end of the first signal acquisition module is connected with the first input end of the signal processing module; the input end of the second signal acquisition module is connected with the output end of the signal detection module, and the output end of the second signal acquisition module is connected with the second input end of the signal processing module. According to the embodiment of the application, when one signal acquisition module is affected by a fault and cannot normally acquire signals, the other signal acquisition module can work normally, so that the functional safety level of the signal acquisition circuit is improved.
Description
Technical Field
The application relates to the technical field of signal processing, in particular to a signal acquisition circuit, signal acquisition equipment and a vehicle.
Background
At present, an electronic accelerator can be used on a vehicle, for example, signals of the stepping depth and the stepping speed of the accelerator of the vehicle can be output through an accelerator signal detection module, and an accelerator signal output by the accelerator signal detection module is collected by a signal collection circuit.
However, the functional safety level of the signal acquisition circuit in the related art is not high enough, and when the signal acquisition is affected by a fault, the signal cannot be normally acquired.
Disclosure of Invention
The application provides a signal acquisition circuit, signal acquisition equipment and vehicle, when one of them signal acquisition module receives the trouble influence and can't normally gather the signal, another signal acquisition module can normally work to help improving signal acquisition circuit's functional security level.
In a first aspect, the present application provides a signal acquisition circuit, including a first signal acquisition module, a second signal acquisition module, and a signal processing module; the input end of the first signal acquisition module is connected with the output end of the signal detection module, and the output end of the first signal acquisition module is connected with the first input end of the signal processing module; the input end of the second signal acquisition module is connected with the output end of the signal detection module, and the output end of the second signal acquisition module is connected with the second input end of the signal processing module.
In a possible implementation manner of the first aspect, at least one of the first signal acquisition module and the second signal acquisition module comprises a signal follower.
In a possible implementation manner of the first aspect, the signal follower includes an operational amplifier, an inverting input terminal of the operational amplifier is connected to an output terminal thereof, a non-inverting input terminal of the operational amplifier is connected to an output terminal of the signal detection module, and an output terminal of the operational amplifier is connected to one of the first input terminal and the second input terminal of the signal processing module.
In a possible implementation manner of the first aspect, the signal acquisition circuit further includes a voltage division module, and an input end of the first signal acquisition module and an input end of the second signal acquisition module are connected to an output end of the signal detection module through the voltage division module.
In a possible implementation manner of the first aspect, the voltage dividing module includes a first resistor and a second resistor;
the first end of the first resistor is connected with the output end of the signal detection module, and the second end of the first resistor is connected with the input end of the first signal acquisition module and the input end of the second signal acquisition module;
the first end of the second resistor is connected with the second end of the first resistor, and the second end of the second resistor is grounded.
In a possible implementation manner of the first aspect, the first signal acquisition module includes a third resistor and a first capacitor;
the first end of the third resistor is connected with the output end of the signal detection module, and the second end of the third resistor is connected with the first input end of the signal processing module;
the first end of the first capacitor is connected with the second end of the third resistor, and the second end of the first capacitor is grounded.
In a possible implementation manner of the first aspect, the second signal acquisition module includes a signal follower, the signal follower includes an operational amplifier, an inverting input terminal of the operational amplifier is connected to an output terminal of the operational amplifier, a non-inverting input terminal of the operational amplifier is connected to an output terminal of the signal detection module, and an output terminal of the operational amplifier is connected to a second input terminal of the signal processing module.
In a possible implementation manner of the first aspect, the second signal acquisition module further includes a fourth resistor and a second capacitor;
the first end of the fourth resistor is connected with the output end of the operational amplifier, and the second end of the fourth resistor is connected with the second input end of the signal processing module;
the first end of the second capacitor is connected with the second end of the fourth resistor, and the second end of the second capacitor is grounded.
In a possible implementation manner of the first aspect, the signal acquisition circuit further includes a first diode and a second diode;
the anode of the first diode is grounded, and the cathode of the first diode is connected with the input end of the first signal acquisition module and the input end of the second signal acquisition module;
the anode of the second diode is connected with the cathode of the first diode, and the cathode of the second diode is connected with the first power supply end;
and/or, the signal acquisition circuit further comprises a third diode and a fourth diode;
the anode of the third diode is grounded, and the cathode of the third diode is connected with the output end of the second signal acquisition module and the second input end of the signal processing module;
the anode of the fourth diode is connected with the cathode of the third diode, and the cathode of the fourth diode is connected with the second power supply end.
Based on the same inventive concept, in a second aspect, embodiments of the present application provide a signal acquisition device comprising a signal acquisition circuit according to any one of the embodiments of the first aspect.
Based on the same inventive concept, in a third aspect, embodiments of the present application provide a vehicle, including a signal detection module and a signal acquisition device according to any one of the embodiments of the second aspect.
According to the signal acquisition circuit, the signal acquisition equipment and the vehicle, due to the fact that the two signal acquisition modules are arranged, when one signal acquisition module is affected by a fault and cannot normally acquire signals, the other signal acquisition module can serve as a redundant signal acquisition module, namely, the other signal acquisition module can work normally. Therefore, by arranging the two signal acquisition modules, the functional safety level of the signal acquisition circuit can be improved, and the normal driving operation can be prevented from being influenced under the condition that the signal acquisition circuit acquires the accelerator signal, so that the safety can be improved.
Drawings
Features, advantages, and technical effects of exemplary embodiments of the present application will be described below with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of a signal acquisition circuit according to an embodiment of the present application;
fig. 2 is a schematic structural diagram of a signal acquisition circuit according to another embodiment of the present application;
fig. 3 is a schematic structural diagram of a signal acquisition circuit according to another embodiment of the present disclosure;
fig. 4 is a schematic structural diagram of a signal acquisition circuit according to another embodiment of the present disclosure;
fig. 5 is a schematic structural diagram of a signal acquisition circuit according to another embodiment of the present disclosure;
fig. 6 is a schematic block diagram of a vehicle according to an embodiment of the present application.
In the drawings, the drawings are not necessarily to scale.
In the accompanying drawings:
10. a signal acquisition circuit; 11. a first signal acquisition module; 12. the second signal acquisition module, 13, signal processing module; 14. a voltage dividing module;
20. a signal detection module;
100. a vehicle.
Detailed Description
For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, based on the embodiments herein, which would be apparent to one of ordinary skill in the art without making any inventive effort, are intended to be within the scope of the present application.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having" and any variations thereof in the description and claims of the present application and in the description of the figures above are intended to cover non-exclusive inclusions. The terms first, second and the like in the description and in the claims or in the above-described figures, are used for distinguishing between different objects and not necessarily for describing a particular sequential or chronological order.
In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "attached" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.
Currently, with the development of automobile technology, electronic throttle is gradually applied to vehicles. For example, signals of the stepping depth and the stepping speed of the accelerator of the vehicle can be output through the accelerator signal detection module, and the accelerator signal output by the accelerator signal detection module is collected by the signal collection circuit.
However, the functional safety level of the signal acquisition circuit in the related art is not high enough, and when the signal acquisition is affected by a fault, the signal cannot be normally acquired.
In order to solve the above technical problems, embodiments of the present application provide a signal acquisition circuit, a signal acquisition device, and a vehicle, and the signal acquisition circuit, the signal acquisition device, and the vehicle provided in the embodiments of the present application will be described in detail below with reference to the accompanying drawings.
The following first describes a signal acquisition circuit provided in the application embodiment.
Fig. 1 is a schematic structural diagram of a signal acquisition circuit according to an embodiment of the present application. As shown in fig. 1, the signal acquisition circuit 10 may include a first signal acquisition module 11, a second signal acquisition module 12, and a signal processing module 13. The first signal acquisition module 11 and the second signal acquisition module 12 may be configured to acquire signals output by the signal detection module, and transmit the acquired signals to different input ends of the signal processing module 13.
Specifically, referring to fig. 1, an input end of the first signal acquisition module 11 is connected to an output end of the signal detection module 20, and an output end of the first signal acquisition module 11 is connected to a first input end ai_adc1 of the signal processing module 13. The input end of the second signal acquisition module 12 is connected with the output end of the signal detection module 20, and the output end of the second signal acquisition module 12 is connected with the second input end AI_ADC2 of the signal processing module 13.
The signal acquisition circuit 10 provided in the embodiment of the application can be used for acquiring the throttle signal of a vehicle. The signal detection module 20 may be an accelerator signal detection module, and the signal detection module 20 may be configured to detect a level and a speed of stepping on an accelerator pedal, and output an analog signal. The signal detection module 20 may be a signal sensor, for example. The first signal acquisition module 11 and the second signal acquisition module 12 can acquire analog signals output by the signal detection module 20 and transmit the analog signals to different input ends of the signal processing module 13. The signal processing module 13 may further process the analog signals it acquires, for example, may convert the analog signals into corresponding digital signals.
It can be appreciated that, since the first signal acquisition module 11 and the second signal acquisition module 12 are connected to the same output end of the signal detection module 20, the signals acquired by the first signal acquisition module 11 and the second signal acquisition module 12 are the same.
In this embodiment of the present application, since two signal acquisition modules are provided, when one of the signal acquisition modules is affected by a fault and cannot normally acquire signals, the other signal acquisition module may be used as a redundant signal acquisition module, that is, the other signal acquisition module may normally operate. Therefore, by arranging the two signal acquisition modules, the functional safety level of the signal acquisition circuit can be improved, and the normal driving operation can be prevented from being influenced under the condition that the signal acquisition circuit acquires the accelerator signal, so that the safety can be improved.
The specific circuit structures of the first signal acquisition module 11 and the second signal acquisition module 12 may be the same, or the specific circuit structures of the first signal acquisition module 11 and the second signal acquisition module 12 may be different.
In some embodiments, at least one of the first signal acquisition module 11 and the second signal acquisition module 12 may comprise a signal follower. In fig. 2, the second signal acquisition module 12 includes a signal follower as an example, it is understood that the first signal acquisition module 11 may include a signal follower, or both the first signal acquisition module 11 and the second signal acquisition module 12 may include a signal follower.
Specifically, please continue to refer to fig. 2, the signal follower may specifically include an operational amplifier P, wherein an inverting input terminal Vin-of the operational amplifier P is connected to an output terminal of the operational amplifier P, a non-inverting input terminal vin+ of the operational amplifier P is connected to an output terminal of the signal detection module 20, and an output terminal of the operational amplifier P is connected to one of the first input terminal ai_adc1 and the second input terminal ai_adc2 of the signal processing module 13. It will be appreciated that in case the second signal acquisition module 12 comprises a signal follower, the output of the calculation amplifier P is connected to the second input ai_adc2 of the signal processing module 13.
In this embodiment of the application, through selecting the operational amplifier as the signal follower for signal follower input impedance is high and output impedance is low characteristics, and the influence between the preceding and succeeding stages can be kept apart to the signal follower like this, plays excessive buffering effect, that is to say that the signal follower can keep apart input signal and output signal, reduces the interference of input to the output to minimum, eliminates the mutual interference of both, guarantees signal acquisition module's reliability, and then further improves signal acquisition circuit's overall reliability. In addition, by selecting the operational amplifier as the signal follower, the gain of the signal follower is basically 1, so that the signal follower can truly transmit an input signal to an output end, namely, a signal acquisition module can truly transmit an acquired signal to a signal processing module, and the accuracy of the acquired signal is ensured.
The operational amplifier P may further include a first power pin connectable to the first power terminal V1 and a second power pin connectable to the ground GND. For example, the first power terminal V1 may provide a voltage of 3.3V, and the voltage of the first power terminal V1 may also have other values, which are not limited in this application.
It can be appreciated that in the case that the second signal acquisition module 12 includes the operational amplifier P, the non-inverting input terminal vin+ of the operational amplifier P is the input terminal of the second signal acquisition module 12.
The signal processing module 13 may include an integrated circuit chip having a multi-channel analog/digital conversion function. The inventors have found that the processing accuracy of the input voltage by the signal processing module 13 is higher in the case where the received signal voltage is lower.
Based on this, referring to fig. 3, the signal acquisition circuit 10 may further include a voltage dividing module 14, and the input end of the first signal acquisition module 11 and the input end of the second signal acquisition module 12 are connected to the output end of the signal detection module 20 through the voltage dividing module 14.
In this embodiment, the signal output by the output end of the signal detection module 20 is firstly transmitted to the input end of the first signal acquisition module 11 and the input end of the second signal acquisition module 12 through the voltage division module 14, so that the signal voltage received by the input end of the first signal acquisition module 11 and the input end of the second signal acquisition module 12 is smaller than the output end of the signal detection module 20, and the voltage transmitted to the signal processing module 13 by the first signal acquisition module 11 and the second signal acquisition module 12 is also reduced, so that the signal voltage received by the signal processing module 13 is reduced, and the processing precision of the signal processing module 13 to the input voltage can be improved.
As an example, referring to fig. 4, the voltage dividing module 14 may include a first resistor R1 and a second resistor R2. The first end of the first resistor R1 is connected to the output end of the signal detection module 20, and the second end of the first resistor R1 is connected to the input end of the first signal acquisition module 11 and the input end of the second signal acquisition module 12. The first end of the second resistor R2 is connected to the second end of the first resistor R1, and the second end of the second resistor R2 is grounded GND. In the embodiment of the application, the voltage dividing circuit can be formed by only two resistors, and the voltage dividing circuit is simple in structure and low in cost.
For convenience of description, the second end of the first resistor R1, the first end of the second resistor R2, the input end of the first signal acquisition module 11, and the input end of the second signal acquisition module 12 are connected to the node N1, and the voltage of the node N1 is less than the voltage output by the output end of the signal detection module 20.
It is understood that the resistance values of the first resistor R1 and the second resistor R2 may be set according to the processing precision of the signal processing module 13 and/or the voltage range that the signal processing module 13 can support. It can be understood that, when the resistance value of the second resistor R2 is constant and the voltage output from the output end of the signal detection module 20 is constant, the larger the resistance value of the first resistor R1, the larger the voltage occupied by the first resistor R1 and the smaller the voltage of the node N1; the smaller the resistance value of the first resistor R1, the smaller the voltage division it occupies, and the greater the voltage of the node N1.
It is understood that the configuration of the voltage divider module 14 shown in fig. 4 is merely an example, and other configurations of voltage divider circuits may be used.
In some embodiments, referring to fig. 5, the first signal acquisition module 11 may include a third resistor R3 and a first capacitor C1. Specifically, a first end of the third resistor R3 is connected to the output end of the signal detection module 20, and a second end of the third resistor R3 is connected to the first input end ai_adc1 of the signal processing module 13. The first end of the first capacitor C1 is connected to the second end of the third resistor R3, and the second end of the first capacitor C1 is grounded GND.
In this embodiment, the third resistor R3 and the first capacitor C1 may form a filter, so as to filter out the interference signal, and further prevent the interference signal from interfering with the signal received by the first input terminal ai_adc1 of the second terminal connection signal processing module 13.
It is understood that, in the case that the signal acquisition circuit 10 includes the voltage dividing module 14, the third resistor R3 may be connected to the output terminal of the signal detection module 20 through the voltage dividing module 14. Specifically, the first end of the third resistor R3 may be connected to the node N1.
The third resistor R3 and the first capacitor C1 may form a low-pass filter, and the cut-off frequency of the filter formed by the third resistor R3 and the first capacitor C1 may be set according to practical requirements, which is not limited in the present application.
As introduced above, at least one of the first signal acquisition module 11 and the second signal acquisition module 12 may include a signal follower, and only one of the first signal acquisition module 11 and the second signal acquisition module 12 may be set to include a signal follower. Therefore, in the case that the first signal acquisition module 11 does not include a signal follower, the second signal acquisition module 12 may include a signal follower, and thus, the cost can be reduced as compared to the case where both acquisition modules include a signal follower, only one of the acquisition modules includes a signal follower.
Specifically, referring to fig. 5, the second signal acquisition module 12 may include a signal follower, the signal follower may include an operational amplifier P, an inverting input terminal Vin-of the operational amplifier P is connected to an output terminal of the operational amplifier P, a non-inverting input terminal vin+ of the operational amplifier P is connected to an output terminal of the signal detection module 20, and an output terminal of the operational amplifier P is connected to a second input terminal ai_adc2 of the signal processing module 13.
It is understood that, in the case that the signal acquisition circuit 10 includes the voltage dividing module 14, the non-inverting input terminal vin+ of the operational amplifier P may be connected to the output terminal of the signal detection module 20 through the voltage dividing module 14. Specifically, the non-inverting input terminal vin+ of the operational amplifier P may be connected to the node N1.
In some embodiments, referring to fig. 5, the second signal acquisition module 12 may further include a fourth resistor R4 and a second capacitor C2. The first end of the fourth resistor R4 is connected to the output end of the operational amplifier P, and the second end of the fourth resistor R4 is connected to the second input end ai_adc2 of the signal processing module 13. The first end of the second capacitor C2 is connected to the second end of the fourth resistor R2, and the second end of the second capacitor C2 is grounded GND.
In this embodiment, the fourth resistor R4 and the second capacitor C2 may also form a filter, so as to filter out the interference signal, and further avoid the interference signal from interfering with the signal received by the second input terminal ai_adc2 of the second terminal connection signal processing module 13.
It is understood that, in the case that the signal acquisition circuit 10 includes the fourth resistor R4, the output terminal of the operational amplifier P may be connected to the second input terminal ai_adc2 of the signal processing module 13 through the fourth resistor R4.
The fourth resistor R4 and the second capacitor C2 may form a low-pass filter, and the cut-off frequency of the filter formed by the fourth resistor R4 and the second capacitor C2 may be set according to practical requirements, which is not limited in the present application.
As an example, the cut-off frequency of the filter formed by the third resistor R3 and the first capacitor C1 may be the same as the cut-off frequency of the filter formed by the fourth resistor R4 and the second capacitor C2, so as to ensure consistency of the signals received by the two input terminals of the signal processing module 13.
Specifically, the resistance values of the third resistor R3 and the fourth resistor R4 may be equal. The capacitance values of the first capacitor C1 and the second capacitor C2 may be equal.
It can be understood that, when one of the first signal acquisition module 11 and the second signal acquisition module 12 cannot acquire signals normally due to a fault, the signal processing module 13 may control signals acquired by the acquisition modules that can work normally. In the case that the first signal acquisition module 11 and the second signal acquisition module 12 can both acquire signals normally and the signals transmitted to the first input terminal ai_adc1 and the second input terminal ai_adc2 are different, the second signal acquisition module 12 uses the operational amplifier as the follower, so that the second signal acquisition module 12 has higher temperature, and the signal processing module 13 can control the signals received by the second input terminal ai_adc2.
In some embodiments, the signal acquisition circuit 10 may further include at least one of a first clamp diode and a second clamp diode. The clamp diode may comprise two diodes connected in series.
The first clamping diode can be connected with the input end of the first signal acquisition module 11 and the input end of the second signal acquisition module 12, so that the first clamping diode can avoid potential safety hazards caused by faults of the input ends. Because only the third resistor R3 is connected in series between the input end and the output end of the first signal acquisition module 11, the potential safety hazard caused by the output end of the first signal acquisition module 11 can be avoided by the first clamping diode.
The second clamping diode may be connected to the output end of the second signal acquisition module 12, so that the second clamping diode may avoid a potential safety hazard caused by a failure of the output end of the second signal acquisition module 12.
Specifically, with continued reference to fig. 5, the first clamping diode may include a first diode D1 and a second diode D2. The anode of the first diode D1 is grounded, and the cathode of the first diode D1 is connected with the input end of the first signal acquisition module 11 and the input end of the second signal acquisition module 12; the anode of the second diode D2 is connected with the cathode of the first diode D1, and the cathode of the second diode D2 is connected with the first power supply V1.
The second clamp diode may include a third diode D3 and a fourth diode D4. The anode of the third diode D3 is grounded GND, and the cathode of the third diode D3 is connected to the output end of the second signal acquisition module 12 and the second input end ai_adc2 of the signal processing module 13. The anode of the fourth diode D4 is connected to the cathode of the third diode D3, and the cathode of the fourth diode D4 is connected to the second power source V2.
The first power supply V1 and the second power supply V2 are both direct-current stabilized voltage supplies. The voltage values of the first power supply V1 and the second power supply V2 may be set according to actual requirements. For example, the voltage value of the first power V1 may be greater than the voltage value of the second power V2. For another example, the voltage value of the first power V1 may be 3.3V. The voltage value of the second power supply V2 may be 2.5V or less and 1.8V or more.
It is understood that the cathode of the first diode D1, the anode of the second diode D2, the non-inverting input terminal vin+ of the operational amplifier P, the first terminal of the third resistor R3, the second terminal of the first resistor R1, and the first terminal of the second resistor R2 may be connected to the node N1. The cathode of the third diode D3, the anode of the fourth diode D4, the second terminal of the fourth resistor R4, the first terminal of the second capacitor C2, and the second input terminal ai_adc2 of the signal processing module 13 may be connected to the node N2.
Based on the same inventive concept, the embodiments of the present application also provide a signal acquisition device, including the signal acquisition circuit in any one of the above embodiments. It can be appreciated that the signal acquisition device has the beneficial effects of the signal acquisition circuit provided in the embodiments of the present application, and specific descriptions of the signal acquisition circuit in the foregoing embodiments may be referred to, which is not repeated herein.
Based on the same inventive concept, the application also provides a vehicle. As shown in fig. 6, the vehicle 100 includes the signal detection module 20 and the signal acquisition device including the signal acquisition circuit 10 in any of the above embodiments. It can be appreciated that the vehicle has the beneficial effects of the signal acquisition circuit provided in the embodiments of the present application, and specific descriptions of the signal acquisition circuit in the above embodiments may be referred to, which is not repeated herein.
Specifically, the signal detection module 20 may be a throttle signal detection module.
It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other.
While the present application has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the present application, and in particular, the technical features mentioned in the various embodiments may be combined in any manner as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.
Claims (11)
1. The signal acquisition circuit is characterized by comprising a first signal acquisition module, a second signal acquisition module and a signal processing module;
the input end of the first signal acquisition module is connected with the output end of the signal detection module, and the output end of the first signal acquisition module is connected with the first input end of the signal processing module;
the input end of the second signal acquisition module is connected with the output end of the signal detection module, and the output end of the second signal acquisition module is connected with the second input end of the signal processing module.
2. The signal acquisition circuit of claim 1 wherein at least one of the first signal acquisition module and the second signal acquisition module comprises a signal follower.
3. The signal acquisition circuit of claim 2 wherein the signal follower comprises an operational amplifier having an inverting input coupled to an output thereof, a non-inverting input coupled to an output of the signal detection module, and an output coupled to one of the first and second inputs of the signal processing module.
4. A signal acquisition circuit according to any one of claims 1 to 3, further comprising a voltage dividing module, the input of the first signal acquisition module and the input of the second signal acquisition module being connected to the output of the signal detection module by the voltage dividing module.
5. The signal acquisition circuit of claim 4, wherein the voltage divider module comprises a first resistor and a second resistor;
the first end of the first resistor is connected with the output end of the signal detection module, and the second end of the first resistor is connected with the input end of the first signal acquisition module and the input end of the second signal acquisition module;
the first end of the second resistor is connected with the second end of the first resistor, and the second end of the second resistor is grounded.
6. A signal acquisition circuit according to any one of claims 1 to 3, wherein the first signal acquisition module comprises a third resistor and a first capacitor;
the first end of the third resistor is connected with the output end of the signal detection module, and the second end of the third resistor is connected with the first input end of the signal processing module;
the first end of the first capacitor is connected with the second end of the third resistor, and the second end of the first capacitor is grounded.
7. The signal acquisition circuit of claim 6 wherein the second signal acquisition module comprises a signal follower, the signal follower comprising an operational amplifier, the inverting input of the operational amplifier being coupled to the output thereof, the non-inverting input of the operational amplifier being coupled to the output of the signal detection module, the output of the operational amplifier being coupled to the second input of the signal processing module.
8. The signal acquisition circuit of claim 7 wherein the second signal acquisition module further comprises a fourth resistor and a second capacitor;
the first end of the fourth resistor is connected with the output end of the operational amplifier, and the second end of the fourth resistor is connected with the second input end of the signal processing module;
the first end of the second capacitor is connected with the second end of the fourth resistor, and the second end of the second capacitor is grounded.
9. The signal acquisition circuit of claim 7 further comprising a first diode and a second diode;
the anode of the first diode is grounded, and the cathode of the first diode is connected with the input end of the first signal acquisition module and the input end of the second signal acquisition module;
the anode of the second diode is connected with the cathode of the first diode, and the cathode of the second diode is connected with the first power supply end;
and/or, the signal acquisition circuit further comprises a third diode and a fourth diode;
the anode of the third diode is grounded, and the cathode of the third diode is connected with the output end of the second signal acquisition module and the second input end of the signal processing module;
the anode of the fourth diode is connected with the cathode of the third diode, and the cathode of the fourth diode is connected with the second power supply end.
10. A signal acquisition device comprising a signal acquisition circuit as claimed in any one of claims 1 to 9.
11. A vehicle comprising a signal detection module and a signal acquisition device according to claim 10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202223396369.8U CN218938812U (en) | 2022-12-16 | 2022-12-16 | Signal acquisition circuit, signal acquisition equipment and vehicle |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202223396369.8U CN218938812U (en) | 2022-12-16 | 2022-12-16 | Signal acquisition circuit, signal acquisition equipment and vehicle |
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| CN218938812U true CN218938812U (en) | 2023-04-28 |
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| CN202223396369.8U Active CN218938812U (en) | 2022-12-16 | 2022-12-16 | Signal acquisition circuit, signal acquisition equipment and vehicle |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117032188A (en) * | 2023-09-01 | 2023-11-10 | 深圳市怡亚通供应链股份有限公司 | Automobile safety monitoring system and method and electronic equipment |
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2022
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117032188A (en) * | 2023-09-01 | 2023-11-10 | 深圳市怡亚通供应链股份有限公司 | Automobile safety monitoring system and method and electronic equipment |
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