Sensor signal processing device based on control chip

By designing a signal processing module and a pulse signal output module on the control chip to process and output sensor signals, the problem of performance limitations and increased power consumption when the control chip adapts to different sensor signals is solved, and higher signal resolution and lower power consumption are achieved.

CN222940803UActive Publication Date: 2025-06-03CHONGQING ENDURANCE IND
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Patent Information

Application Number
CN202421375390.6
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-06-13
Publication Date
2025-06-03
Estimated Expiration
2034-06-13

AI Technical Summary

Technical Problem

When adapting to different types of sensor signals, existing control chips need to integrate digital-to-analog converters or connect external components, resulting in performance limitations, increased power consumption and insufficient design flexibility.

Method used

A sensor signal processing device based on a control chip is designed, including a signal processing module and a pulse signal output module. The signal processing module processes the sensor signal through the digital signal processing unit and the analog signal processing unit, and outputs the processed current signal; the pulse signal output module identifies and outputs the pulse signal through the comparator unit.

Benefits of technology

Improve signal resolution and signal conversion rate, reduce power supply requirements, and overcome the performance limitations and increased power consumption caused by digital-to-analog converters.

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Abstract

The utility model provides a sensor signal processing device based on a control chip. The sensor signal processing device comprises a signal processing module and a pulse signal output module, the signal processing module comprises a digital signal processing unit and an analog signal processing unit; the pulse signal output module comprises a comparator unit; the comparator unit is respectively connected with the digital signal processing unit and the analog signal processing unit; the signal processing module receives the digital signal and the analog signal and outputs a processed current signal; the pulse signal output module receives the processed current signal and outputs a pulse signal. The sensor signal processing device based on the control chip provided by the utility model has higher signal resolution and signal conversion rate and lower power supply demand, and overcomes the problems of limitation on the performance of the control chip and higher power consumption compared with an additional digital-to-analog converter based on the control chip.
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Description

Technical Field

[0001] The utility model relates to the technical field of electronic circuits, and particularly relates to a sensor signal processing device based on a control chip. Background Art

[0002] The control chip receives the sensor signals sent by the sensors and performs corresponding control tasks according to these sensor signals, including signal processing, data conversion, logic control, etc. However, the sensor signals output by different types of sensors are different. Therefore, for the control chip to correctly process and utilize the above-mentioned sensor signals, it usually also needs to integrate an analog-to-digital converter or connect external components to adapt to different types of sensors.

[0003] However, whether it is integrating an analog-to-digital converter or implementing it through external components, it has brought some negative impacts to the control chip itself, such as performance limitations, increased power consumption, lack of design flexibility, etc. Summary of the Utility Model

[0004] Aiming at the deficiencies in the prior art, the utility model provides a sensor signal processing device based on a control chip, which solves the problem that the existing control chip adapts different sensor signals through an analog-to-digital converter, thus affecting the performance of the control chip itself.

[0005] According to an embodiment of the utility model, a sensor signal processing device based on a control chip includes a signal processing module 1 and a pulse signal output module 2;

[0006] The signal processing module 1 includes a digital signal processing unit 11 and an analog signal processing unit 12;

[0007] The pulse signal output module 2 includes a comparator unit 21; the comparator unit 21 is respectively connected to the digital signal processing unit 11 and the analog signal processing unit 12;

[0008] The signal processing module 1 receives digital signals and analog signals and outputs a processed current signal; the pulse signal output module 2 receives the processed current signal and outputs a pulse signal.

[0009] Optionally, the digital signal processing unit 11 includes a first voltage limiting circuit 111 and a first resistor connected in sequence. The input end of the first voltage limiting circuit 111 is connected to an external circuit, and the output end of the first resistor is connected to the input end of the comparator unit 21.

[0010] Optionally, the first resistor is a resistor to be connected.

[0011] Optionally, the first voltage limiting circuit 111 includes a second resistor, a third resistor, a first diode and a second diode connected in series in the same direction, and further includes a fourth resistor;

[0012] The input end of the second resistor is connected to an external circuit, the output end of the first diode is connected to an external voltage, the input end of the second diode is grounded, and the input end of the first diode, the output end of the second diode, the output end of the third resistor, and the input end of the first resistor are connected;

[0013] The input end of the first diode, the output end of the second diode, and the input end of the first resistor are also connected to the input end of the fourth resistor, and the output end of the fourth resistor is grounded.

[0014] Optionally, the analog signal processing unit 12 includes a second voltage limiting circuit 121, a signal amplifying circuit 122, and a fifth resistor connected in sequence;

[0015] The input end of the second voltage limiting circuit 121 is connected to an external circuit, and the output end of the fifth resistor is connected to the input end of the comparator unit 21.

[0016] Optionally, the fifth resistor is a resistor to be connected.

[0017] Optionally, the second voltage limiting circuit 121 includes a first capacitor, a sixth resistor, a seventh resistor, an eighth resistor connected in sequence, and further includes a third diode and a fourth diode connected in reverse parallel;

[0018] After the third diode and the fourth diode are connected in parallel, the output end of the third diode, the input end of the fourth diode are connected to the output end of the eighth resistor, the input end of the third diode, the output end of the fourth diode are connected to one end of the first capacitor and then grounded, and the other end of the first capacitor is connected to the output end of the seventh resistor and the input end of the eighth resistor;

[0019] After the output end of the third diode, the input end of the fourth diode are connected to the output end of the eighth resistor, they are connected to the input end of the signal amplifying circuit 122.

[0020] Optionally, the signal amplifying circuit 122 includes a first operational amplifier, a ninth resistor, and a tenth resistor;

[0021] The inverting input end of the first operational amplifier serves as the input end of the signal amplifying circuit 122;

[0022] The positive input terminal of the first operational amplifier is connected to the input terminal of the ninth resistor, and the output terminal of the ninth resistor is connected to the input terminal of the third diode and the output terminal of the fourth diode and grounded.

[0023] The voltage output terminal of the first operational amplifier is connected to the input terminal of the fifth resistor and the input terminal of the tenth resistor; the output terminal of the tenth resistor is connected to the negative input terminal of the first operational amplifier.

[0024] Optionally, the pulse signal output module 2 further includes a second capacitor, an eleventh resistor, and a twelfth resistor, and the eleventh resistor, the comparator unit 21, and the twelfth resistor are connected in sequence.

[0025] The input terminal of the eleventh resistor is connected to the output terminal of the first resistor and the output terminal of the fifth resistor. The output terminal of the eleventh resistor is connected to the input terminal of the comparator unit 21 and one end of the second capacitor. The other end of the second capacitor is grounded, and the output terminal of the twelfth resistor outputs a pulse signal.

[0026] Optionally, the comparator unit 21 includes a second operational amplifier, a thirteenth resistor, a fourteenth resistor, a fifteenth resistor, a sixteenth resistor, and a seventeenth resistor.

[0027] The positive input terminal of the second operational amplifier serves as the input terminal of the comparator circuit. The positive input terminal of the second operational amplifier is further connected to the input terminal of the thirteenth resistor, and the output terminal of the thirteenth resistor is connected to the voltage output terminal of the second operational amplifier and the input terminal of the twelfth resistor.

[0028] The negative input terminal of the second operational amplifier is sequentially connected to the fourteenth resistor and the fifteenth resistor. The sixteenth resistor is connected in parallel with the fourteenth resistor. The input terminal of the sixteenth resistor is connected to an external voltage. The output terminal of the sixteenth resistor is connected to the input terminal of the seventeenth resistor. The output terminal of the seventeenth resistor is grounded, and the third capacitor is connected in parallel with the seventeenth resistor.

[0029] The technical principle of the present utility model is as follows: The signal processing module receives digital signals and analog signals, and processes them into sensor signals of analog signals through the analog signal processing unit and into sensor signals of digital signals through the digital signal processing unit, and finally outputs the processed current signal; the comparator unit of the pulse signal output module can identify the sensor signals of analog signals and digital signals after processing. Therefore, regardless of whether the sensor signals received by the signal processing module are analog signals or digital signals, after the pulse signal output module receives the processed current signal output by the signal processing module, it can output a pulse signal for the control chip to process and use.

[0030] Compared with the prior art, the utility model has the following beneficial effects: The sensor signal processing device based on a control chip provided by the utility model has higher signal resolution and signal conversion rate, and also has lower power supply requirements. Compared with additionally arranging a digital-to-analog converter based on the control chip, it overcomes the problems of the performance limitation of the control chip itself and the relatively large power consumption required. Brief Description of the Drawings

[0031] Figure 1 It is a schematic diagram of the composition structure of the sensor signal processing device based on a control chip according to an embodiment of the utility model;

[0032] Figure 2 It is a schematic diagram of the composition structure of the sensor signal processing device based on a control chip according to another embodiment of the utility model;

[0033] Figure 3 It is a schematic diagram of the detailed structure of the sensor signal processing device based on a control chip according to an embodiment of the utility model.

[0034] In the above-mentioned drawings: 1. Signal processing module, 11. Digital signal processing unit, 111. First voltage limiting circuit, 12. Analog signal processing unit, 121. Second voltage limiting circuit, 122. Signal amplification circuit; 2. Pulse signal PULSE_IN1 output module, 21. Comparator unit. Detailed Embodiment

[0035] The technical solutions in the utility model will be further described below with reference to the drawings and embodiments.

[0036] As Figure 1 shown, an embodiment of the utility model provides a sensor signal processing device based on a control chip, which includes a signal processing module 1 and a pulse signal output module 2. Among them, the signal processing module 1 includes a digital signal processing unit 11 and an analog signal processing unit 12; the pulse signal output module 2 includes a comparator unit 21; the digital signal processing unit 11 and the analog signal processing unit 12 are respectively connected to the comparator unit 21.

[0037] The detailed working process of this embodiment is as follows: The signal processing module 1 receives sensor signals, where the sensor signals can be digital signals or analog signals. Then, the sensor signals that are analog signals are processed by the analog signal processing unit 12, and the sensor signals that are digital signals are processed by the digital signal processing unit 11. Finally, the signal processing module 1 outputs the processed current signal. Finally, the comparator unit 21 of the pulse signal output module 2 can identify the sensor signals that are analog signals and digital signals after processing. Therefore, regardless of whether the sensor signals received by the signal processing module 1 are analog signals or digital signals, after the pulse signal output module 2 receives the processed current signal output by the signal processing module 1, it can output a pulse signal for the control chip to process and use. Moreover, the sensor signal processing device based on the control chip in the embodiment of the present invention has higher signal resolution and signal conversion rate, and also has lower power supply requirements. Compared with additionally setting a digital-to-analog converter based on the control chip, it overcomes the problems of performance limitations of the control chip itself and relatively large power consumption required.

[0038] Please refer to Figure 2 , the embodiment of the present invention shows Figure 1 the detailed circuit structures of the signal processing module 1 and the pulse signal output module 2 in

[0039] Figure 2 In

[0040] It should be noted that the external circuit includes the output circuit of the external sensor. The first resistor is a resistor to be connected, and the resistor to be connected means that the sensor signal processing device based on the control chip in the embodiment of the present invention is not connected before use, and is connected after determining that the signal type of the external sensor is a digital signal. The connection methods include but are not limited to welding and switches.

[0041] As Figure 3 shown, in a preferred implementation, the first voltage limiting circuit 111 includes a clamping circuit composed of two diodes connected in series in the same direction, Figure 3An exemplary detailed structure of the first voltage limiting circuit 111 is shown. The first voltage limiting circuit 111 includes a second resistor R2, a third resistor R3, and a first diode D1 and a second diode D2 connected in series in the same direction, and further includes a fourth resistor R4; the input end of the second resistor R2 is connected to an external circuit, the output end of the first diode D1 is connected to an external voltage, the input end of the second diode D2 is grounded, and the input end of the first diode D1, the output end of the second diode D2, the output end of the third resistor R3, and the input end of the first resistor R1 are connected; the input end of the first diode D1, the output end of the second diode D2, and the input end of the first resistor R1 are also connected to the input end of the fourth resistor R4, and the output end of the fourth resistor R4 is grounded.

[0042] It should be noted that the external voltage in the embodiments of the present invention includes the voltage output provided by the control chip, that is Figure 3 the VCC_MCU shown.

[0043] Figure 2 In [description], for the analog signal processing unit 12 of the signal processing module 1, the analog signal processing unit 12 includes a second voltage limiting circuit 121, a signal amplification circuit 122, and a fifth resistor R5 connected in sequence; the input end of the second voltage limiting circuit 121 is connected to an external circuit, and the output end of the fifth resistor R5 is connected to the input end of the comparator unit 21.

[0044] It should be noted that the fifth resistor R5 is a resistor to be connected. Similar to the first resistor R1, the fifth resistor R5 indicates that the sensor signal processing device based on the control chip in the embodiments of the present invention is not connected before use and is connected after determining that the signal type of the external sensor is an analog signal. The connection methods include but are not limited to soldering and switching.

[0045] As Figure 3 shown, in a preferred implementation, the second voltage limiting circuit 121 includes a clamping circuit composed of two diodes connected in reverse parallel. Figure 3An exemplary detailed structure of the second voltage limiting circuit 121 is shown. The second voltage limiting circuit 121 includes a first capacitor C1, a sixth resistor R6, a seventh resistor R7, and an eighth resistor R8 connected in sequence, and also includes a third diode D3 and a fourth diode D4 connected in antiparallel; after the third diode D3 and the fourth diode D4 are connected in parallel, the output end of the third diode D3, the input end of the fourth diode D4 are connected to the output end of the eighth resistor R8, the input end of the third diode D3, the output end of the fourth diode D4 are connected to one end of the first capacitor C1 and then grounded, the other end of the first capacitor C1 is connected to the output end of the seventh resistor R7 and the input end of the eighth resistor R8; after the output end of the third diode D3, the input end of the fourth diode D4 are connected to the output end of the eighth resistor R8, they are connected to the input end of the signal amplification circuit 122.

[0046] In the embodiment of the present invention, the analog signal processing unit 12 is used to amplify the analog signal so that it can be recognized by the pulse signal output module 2, so that the pulse signal output module 2 outputs an accurate pulse signal PULSE_IN1, so that the control chip can correctly process and utilize this sensor signal including the analog signal.

[0047] As Figure 3 shown, in a preferred implementation, the signal amplification circuit 122 is implemented by an operational amplifier. Figure 3 An exemplary detailed structure of the signal amplification circuit 122 is shown. The signal amplification circuit 122 includes a first operational amplifier T1, a ninth resistor R9, and a tenth resistor R10; the inverting input terminal of the first operational amplifier T1 serves as the input terminal of the signal amplification circuit 122; the non-inverting input terminal of the first operational amplifier T1 is connected to the input terminal of the ninth resistor R9, the output terminal of the ninth resistor R9 is connected to the input terminal of the third diode D3, the output terminal of the fourth diode D4 and grounded; the voltage output terminal of the first operational amplifier T1 is connected to the input terminal of the fifth resistor R5 and the input terminal of the tenth resistor R10; the output terminal of the tenth resistor R10 is connected to the inverting input terminal of the first operational amplifier T1.

[0048] Figure 2 In, for the pulse signal output module 2, the pulse signal output module 2 further includes a second capacitor C2, an eleventh resistor R11, and a twelfth resistor R12, and the eleventh resistor R11, the comparator unit 21, and the twelfth resistor R12 are connected in sequence; the input terminal of the eleventh resistor R11 is connected to the output terminal of the first resistor R1 and the output terminal of the fifth resistor R5, the output terminal of the eleventh resistor R11 is connected to the input terminal of the comparator unit 21 and one end of the second capacitor C2, the other end of the second capacitor C2 is grounded, and the output terminal of the twelfth resistor outputs the pulse signal PULSE_IN1.

[0049] As Figure 3As shown, in a preferred implementation, the comparator unit 21 is implemented by an operational amplifier. Figure 3 An exemplary detailed structure of the comparator unit 21 is shown. The comparator unit 21 includes a second operational amplifier T2, a thirteenth resistor R13, a fourteenth resistor R14, a fifteenth resistor R15, a sixteenth resistor R16, and a seventeenth resistor R17; the positive input terminal of the second operational amplifier T2 serves as the input terminal of the comparator circuit, and the positive input terminal of the second operational amplifier T2 is also connected to the input terminal of the thirteenth resistor R13. The output terminal of the thirteenth resistor R13 is connected to the voltage output terminal of the second operational amplifier T2 and the input terminal of the twelfth resistor R12; the negative input terminal of the second operational amplifier T2 is sequentially connected to the fourteenth resistor R14 and the fifteenth resistor R15. The sixteenth resistor R16 is connected in parallel with the fourteenth resistor R14. The input terminal of the sixteenth resistor R16 is connected to an external voltage. The output terminal of the sixteenth resistor R16 is connected to the input terminal of the seventeenth resistor R17. The output terminal of the seventeenth resistor R17 is grounded. The third capacitor C3 is connected in parallel with the seventeenth resistor R17.

[0050] In addition, it should be noted that in the embodiments of the present invention, the power supply voltages of the first operational amplifier T1 and the second operational amplifier T2 are from the control chip, that is Figure 2 the VCC_MCU shown, and compared with the digital-to-analog converter, the power supply requirements of the first operational amplifier T1 and the second operational amplifier T2 are lower and the power consumption is smaller.

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered by the scope of the claims of the present invention.

Claims

1. A sensor signal processing device based on a control chip, characterized in that: It comprises a signal processing module (1) and a pulse signal output module (2); The signal processing module (1) comprises a digital signal processing unit (11) and an analog signal processing unit (12); The pulse signal output module (2) comprises a comparator unit (21); the comparator unit (21) is connected to the digital signal processing unit (11) and the analog signal processing unit (12) respectively; The signal processing module (1) receives digital signals and analog signals, and outputs processed current signals; the pulse signal output module (2) receives the processed current signals and outputs pulse signals.

2. The sensor signal processing device based on the control chip according to claim 1, characterized in that: The digital signal processing unit (11) comprises a first voltage limiting circuit (111) and a first resistor which are connected in sequence, the input end of the first voltage limiting circuit (111) is connected to an external circuit, and the output end of the first resistor is connected to the input end of the comparator unit (21).

3. The sensor signal processing device based on the control chip according to claim 2, characterized in that: The first resistor is a waiting resistor.

4. The sensor signal processing device based on the control chip according to claim 2, characterized in that: The first voltage limiting circuit (111) comprises a second resistor, a third resistor, and a first diode and a second diode connected in series in the same direction, which are connected in sequence, and also comprises a fourth resistor; The input end of the second resistor is connected to an external circuit, the output end of the first diode is connected to an external voltage, the input end of the second diode is grounded, and the input end of the first diode and the output end of the second diode are connected to the output end of the third resistor and the input end of the first resistor; The input end of the first diode, the output end of the second diode and the input end of the first resistor are also connected to the input end of the fourth resistor, and the output end of the fourth resistor is grounded.

5. The sensor signal processing device based on the control chip according to claim 1, characterized in that: The analog signal processing unit (12) comprises a second voltage limiting circuit (121), a signal amplifying circuit (122) and a fifth resistor which are connected in sequence; The input end of the second voltage limiting circuit (121) is connected to an external circuit, and the output end of the fifth resistor is connected to the input end of the comparator unit (21).

6. The sensor signal processing device based on the control chip according to claim 5, characterized in that: The fifth resistor is a waiting resistor.

7. The sensor signal processing device based on the control chip according to claim 5, characterized in that: The second voltage limiting circuit (121) comprises a first capacitor, a sixth resistor, a seventh resistor, and an eighth resistor connected in sequence, and also comprises a third diode and a fourth diode connected in reverse parallel; After the third diode is connected in parallel with the fourth diode, the output end of the third diode and the input end of the fourth diode are connected to the output end of the eighth resistor, the input end of the third diode and the output end of the fourth diode are connected to one end of the first capacitor and then grounded, and the other end of the first capacitor is connected to the output end of the seventh resistor and the input end of the eighth resistor; The output end of the third diode and the input end of the fourth diode are connected to the output end of the eighth resistor and then connected to the input end of the signal amplifying circuit (122).

8. The sensor signal processing device based on the control chip according to claim 5, characterized in that: The signal amplifying circuit (122) comprises a first operational amplifier, a ninth resistor and a tenth resistor; The inverting input terminal of the first operational amplifier serves as the input terminal of the signal amplifying circuit (122); The positive input terminal of the first operational amplifier is connected to the input terminal of the ninth resistor, and the output terminal of the ninth resistor is connected to the input terminal of the third diode and the output terminal of the fourth diode and is grounded; The voltage output terminal of the first operational amplifier is connected to the input terminal of the fifth resistor and the input terminal of the tenth resistor; the output terminal of the tenth resistor is connected to the inverting input terminal of the first operational amplifier.

9. The sensor signal processing device based on the control chip according to claim 1, characterized in that: The pulse signal output module (2) further comprises a second capacitor, an eleventh resistor and a twelfth resistor, wherein the eleventh resistor, the comparator unit (21) and the twelfth resistor are connected in sequence; The input end of the eleventh resistor is connected to the output end of the first resistor and the output end of the fifth resistor, the output end of the eleventh resistor is connected to the input end of the comparator unit (21) and one end of the second capacitor, the other end of the second capacitor is grounded, and the output end of the twelfth resistor outputs a pulse signal.

10. The sensor signal processing device based on the control chip according to claim 9, characterized in that: The comparator unit (21) comprises a second operational amplifier, a thirteenth resistor, a fourteenth resistor, a fifteenth resistor, a sixteenth resistor and a seventeenth resistor; The positive input terminal of the second operational amplifier serves as the input terminal of the comparator unit, the positive input terminal of the second operational amplifier is also connected to the input terminal of the thirteenth resistor, and the output terminal of the thirteenth resistor is connected to the voltage output terminal of the second operational amplifier and the input terminal of the twelfth resistor; The inverting input terminal of the second operational amplifier is connected to the fourteenth resistor and the fifteenth resistor in sequence, the sixteenth resistor is connected to the fourteenth resistor in parallel, the input terminal of the sixteenth resistor is connected to an external voltage, the output terminal of the sixteenth resistor is connected to the input terminal of the seventeenth resistor, the output terminal of the seventeenth resistor is grounded, and the third capacitor is connected to the seventeenth resistor in parallel.