CN114217210A - Amplification conditioning chip system for biological weak small signals - Google Patents
Amplification conditioning chip system for biological weak small signals Download PDFInfo
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Abstract
The invention provides an amplification conditioning chip system for biological weak small signals, which comprises a sensor, a switch group, a switch control circuit, a conditioning circuit group, a core processor and a light and sound warning module, wherein the sensor is used for detecting the biological weak small signals; the signal output end of the sensor is electrically connected with the conditioning circuit group through a switch group respectively; the signal output ends of the conditioning circuit groups are respectively connected with the core processor; the core processor is electrically connected with the switch control circuit and the light and sound warning module respectively.
Description
Technical Field
The invention provides an amplification conditioning chip system for a biological weak small signal, belonging to the technical field of sensing.
Background
In recent years, the rapid development of sensing technology creates favorable conditions for human attention to self physiological signals. The accurate collection of physiological signals such as electrocardio, electroencephalogram, myoelectricity, blood pressure and the like ensures that the research and diagnosis of medical science have effective information support and promotes the development of modern medical science. In addition, the acquisition and analysis of the electroencephalogram signals can realize a series of brain control systems and products, and the brain control system and the brain control products are widely applied to the fields of military affairs, astronavigation, industry, entertainment and the like. However, the existing amplification conditioning circuit aiming at the weak small signal of the organism often has the problem of unstable operation of the amplification conditioning circuit.
Disclosure of Invention
The invention provides an amplification conditioning chip system for a biological weak small signal, which is used for solving the problem that the existing amplification conditioning circuit for the biological weak small signal is unstable in operation:
an amplification conditioning chip system for biological weak small signals comprises a sensor for detecting the biological weak small signals, a switch group, a switch control circuit, a conditioning circuit group, a core processor and a light and sound warning module; the signal output end of the sensor is electrically connected with the conditioning circuit group through a switch group respectively; the signal output ends of the conditioning circuit groups are respectively connected with the core processor; the core processor is electrically connected with the switch control circuit and the light and sound warning module respectively.
Further, the conditioning circuit group comprises a first conditioning circuit, a second conditioning circuit and a third conditioning circuit; and the signal output end of the sensor is respectively connected with the signal input ends of the first conditioning circuit, the second conditioning circuit and the third conditioning circuit through a switch group.
Further, the switch set includes a first switch, a second switch, and a third switch.
Furthermore, the signal output end of the sensor is respectively connected with the signal input ends of the first conditioning circuit, the second conditioning circuit and the third conditioning circuit through a first switch, a second switch and a third switch; the signal output ends of the first conditioning circuit, the second conditioning circuit and the third conditioning circuit are respectively connected with the detection signal input end of the core processor; the alarm control signal output end of the core processor is connected with the control signal input end of the light and sound warning module; the switch control signal output end of the core processor is connected with the control signal input end of the switch control circuit; and the control signal output end of the switch control circuit is respectively connected with the control signal input ends of the first switch, the second switch and the third switch.
Furthermore, the first conditioning circuit comprises a primary chopper circuit, an amplifying circuit, a secondary chopper circuit and a filter circuit; the signal input end of the primary chopper circuit is the signal input end of the first conditioning circuit; the signal output end of the primary chopper circuit is connected with the signal input end of the amplifying circuit; the signal output end of the amplifying circuit is connected with the signal input end of the secondary chopper circuit; the signal output end of the secondary chopper circuit is connected with the signal input end of the filter circuit; and the signal output end of the filter circuit is connected with the detection signal input end of the core processor, and the signal output end of the filter circuit is the signal output end of the first conditioning circuit.
Furthermore, the second conditioning circuit comprises a primary chopper circuit, an amplifying circuit, a secondary chopper circuit and a filter circuit; the signal input end of the primary chopper circuit is the signal input end of the first conditioning circuit; the signal output end of the primary chopper circuit is connected with the signal input end of the amplifying circuit; the signal output end of the amplifying circuit is connected with the signal input end of the secondary chopper circuit; the signal output end of the secondary chopper circuit is connected with the signal input end of the filter circuit; and the signal output end of the filter circuit is connected with the detection signal input end of the core processor, and the signal output end of the filter circuit is the signal output end of the second conditioning circuit.
Furthermore, the third conditioning circuit comprises a first chopper circuit, a first-stage amplification filter circuit, a second chopper circuit and a second-stage amplification filter circuit; the signal input end of the first chopper circuit is the signal input end of the third conditioning circuit; the signal output end of the first chopper circuit is connected with the signal input end of the first-stage amplification filter circuit, and the signal output end of the first-stage amplification filter circuit is connected with the signal input end of the second chopper circuit; the signal output end of the second chopper circuit is connected with the signal input end of the second-stage amplification filter circuit; and the signal output end of the second-stage amplification filter circuit is the signal output end of the third conditioning circuit and is connected with the detection signal input end of the core processor.
Further, the signal processing amplification factor of the first conditioning circuit, the second conditioning circuit and the third conditioning circuit is consistent with the signal processing standard.
Further, the signal conditioning method of the amplification conditioning chip system comprises the following steps:
step 1, the core processor controls the switch control circuit to enable the first switch and the second switch to be kept in a closed state, and the third switch is kept in an open state;
step 2, the sensor collects data in real time and transmits the collected data to the first conditioning circuit and the second conditioning circuit in a voltage signal mode;
step 3, the first conditioning circuit and the second conditioning circuit are processed through chopping, amplification and filtering, and processed signals are sent to a core processor;
step 4, the core processor compares signals input by the first conditioning circuit and the second conditioning circuit, and judges whether a voltage difference value exists between a voltage signal obtained by processing the signal acquired by the sensor by the first conditioning circuit and a voltage signal obtained by processing the signal acquired by the sensor by the second conditioning circuit; if the voltage difference value does not exist, executing step 5; if the voltage difference value exists, executing step 6;
step 5, the core processor outputs signals according to the voltage average value corresponding to the voltage signals obtained after the processing of the first conditioning circuit and the second conditioning circuit;
step 6, if a voltage difference value exists between a voltage signal obtained after the first conditioning circuit processes the signal acquired by the sensor and a voltage signal obtained after the second conditioning circuit processes the signal acquired by the sensor, judging whether the voltage difference value is larger than a preset voltage difference threshold value or not; if the voltage difference value does not exceed the voltage difference threshold, executing step 7; if the voltage difference value exceeds the voltage difference threshold value, executing step 8;
step 7, the core processor performs average processing on the voltage signal obtained after the signal acquired by the sensor is processed by the first conditioning circuit and the voltage signal obtained after the signal acquired by the sensor is processed by the second conditioning circuit to obtain a final output voltage signal, and performs signal output according to the final output voltage signal;
and 8, starting a light and sound warning module by the core processor to prompt a worker to detect the human body again, closing the third conditioning circuit, and judging whether the first conditioning circuit and the second conditioning circuit break down or not through the detection of the third conditioning circuit.
Further, determining whether the first conditioning circuit and the second conditioning circuit are faulty through the detection of the third conditioning circuit includes:
firstly, the core processor acquires voltage signals processed by a first conditioning circuit, a second conditioning circuit and a third conditioning circuit;
secondly, judging whether the voltage difference value between the voltage signals obtained by the first conditioning circuit and the second conditioning circuit is still larger than the voltage difference threshold value, and if the voltage difference value does not exceed the voltage difference threshold value at the moment, executing a third step; if the voltage difference value still exceeds the voltage difference threshold value at the moment, executing a fourth step;
thirdly, the core processor outputs signals according to the voltage average values corresponding to the voltage signals obtained after the processing of the first conditioning circuit, the second conditioning circuit and the third conditioning circuit;
fourthly, acquiring a voltage signal output by the third conditioning circuit, and respectively acquiring a first voltage difference value between the voltage signal output by the third conditioning circuit and the voltage signal output by the first conditioning circuit, and a second voltage difference value between the voltage signal output by the third conditioning circuit and the voltage signal output by the second conditioning circuit; judging whether the first voltage difference value and the second voltage difference value are smaller than the voltage difference threshold value or not; if one of the first voltage difference value and the second voltage difference value is smaller than a voltage difference threshold value, the conditioning circuit with the voltage difference value smaller than the voltage difference threshold value is determined as a normal operation conditioning circuit, and the conditioning circuit with the voltage difference value larger than the voltage difference threshold value is determined as a fault conditioning circuit; at this time, the core processor controls the switch control circuit to disconnect the switch of the fault conditioning circuit, and the corresponding switches of the normal operation conditioning circuit and the third conditioning circuit are kept in a closed and conductive state; if both the first voltage difference value and the second voltage difference value are smaller than a voltage difference threshold value, judging whether the first voltage difference value and the second voltage difference value are smaller than a second voltage difference threshold value; if one of the first voltage difference value and the second voltage difference value is smaller than the second voltage difference threshold value, the conditioning circuit with the voltage difference value smaller than the second voltage difference threshold value is determined as a normal operation conditioning circuit, and the conditioning circuit with the voltage difference value larger than the second voltage difference threshold value is determined as a fault conditioning circuit; at this time, the core processor controls the switch control circuit to disconnect the switch of the fault conditioning circuit, and the corresponding switches of the normal operation conditioning circuit and the third conditioning circuit are kept in a closed and conductive state.
Wherein the second voltage difference threshold is obtained by the following formula:
wherein, V1A signal representing a voltage value output by the first conditioning circuit; v2A signal representing a voltage value output by the second conditioning circuit; vy1Representing the voltage difference threshold; vy1Representing the second voltage difference threshold.
The invention has the beneficial effects that:
the invention provides an amplification conditioning chip system for biological weak small signals, which can detect and monitor the operation performance of an amplification conditioning circuit in real time in the operation process of the amplification conditioning circuit through the operation mode of three conditioning circuits, effectively improve the operation stability monitoring efficiency of the amplification conditioning circuit in the operation process, and ensure the stability of the whole operation of the amplification conditioning circuit system through the cooperative operation of the three conditioning circuits.
Drawings
FIG. 1 is a first schematic diagram of a system for amplifying a conditioning chip system according to the present invention;
FIG. 2 is a second schematic diagram of the system of the amplified conditioning chip system according to the present invention;
FIG. 3 is a flow chart of an enlarged conditioning method of the enlarged conditioning chip system according to the present invention.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.
The invention provides an amplification conditioning chip system for biological weak small signals, which comprises a sensor for detecting the biological weak small signals, a switch group, a switch control circuit, a conditioning circuit group, a core processor and a light and sound warning module, as shown in figures 1 and 2; the signal output end of the sensor is electrically connected with the conditioning circuit group through a switch group respectively; the signal output ends of the conditioning circuit groups are respectively connected with the core processor; the core processor is electrically connected with the switch control circuit and the light and sound warning module respectively.
The conditioning circuit group comprises a first conditioning circuit, a second conditioning circuit and a third conditioning circuit; and the signal output end of the sensor is respectively connected with the signal input ends of the first conditioning circuit, the second conditioning circuit and the third conditioning circuit through a switch group. The switch set includes a first switch, a second switch, and a third switch. The signal output end of the sensor is respectively connected with the signal input ends of the first conditioning circuit, the second conditioning circuit and the third conditioning circuit through a first switch, a second switch and a third switch; the signal output ends of the first conditioning circuit, the second conditioning circuit and the third conditioning circuit are respectively connected with the detection signal input end of the core processor; the alarm control signal output end of the core processor is connected with the control signal input end of the light and sound warning module; the switch control signal output end of the core processor is connected with the control signal input end of the switch control circuit; and the control signal output end of the switch control circuit is respectively connected with the control signal input ends of the first switch, the second switch and the third switch.
Specifically, the first conditioning circuit comprises a primary chopper circuit, an amplifying circuit, a secondary chopper circuit and a filter circuit; the signal input end of the primary chopper circuit is the signal input end of the first conditioning circuit; the signal output end of the primary chopper circuit is connected with the signal input end of the amplifying circuit; the signal output end of the amplifying circuit is connected with the signal input end of the secondary chopper circuit; the signal output end of the secondary chopper circuit is connected with the signal input end of the filter circuit; and the signal output end of the filter circuit is connected with the detection signal input end of the core processor, and the signal output end of the filter circuit is the signal output end of the first conditioning circuit.
The second conditioning circuit comprises a primary chopper circuit, an amplifying circuit, a secondary chopper circuit and a filter circuit; the signal input end of the primary chopper circuit is the signal input end of the first conditioning circuit; the signal output end of the primary chopper circuit is connected with the signal input end of the amplifying circuit; the signal output end of the amplifying circuit is connected with the signal input end of the secondary chopper circuit; the signal output end of the secondary chopper circuit is connected with the signal input end of the filter circuit; and the signal output end of the filter circuit is connected with the detection signal input end of the core processor, and the signal output end of the filter circuit is the signal output end of the second conditioning circuit.
The third conditioning circuit comprises a first chopper circuit, a first-stage amplification filter circuit, a second chopper circuit and a second-stage amplification filter circuit; the signal input end of the first chopper circuit is the signal input end of the third conditioning circuit; the signal output end of the first chopper circuit is connected with the signal input end of the first-stage amplification filter circuit, and the signal output end of the first-stage amplification filter circuit is connected with the signal input end of the second chopper circuit; the signal output end of the second chopper circuit is connected with the signal input end of the second-stage amplification filter circuit; and the signal output end of the second-stage amplification filter circuit is the signal output end of the third conditioning circuit and is connected with the detection signal input end of the core processor. And the signal processing amplification factors of the first conditioning circuit, the second conditioning circuit and the third conditioning circuit are consistent with the signal processing standard.
The working principle of the technical scheme is as follows: the core processor controls the switch control circuit to enable the first switch and the second switch to be kept in a closed state, and the third switch is kept in an open state; the sensor collects data in real time and transmits the collected data to the first conditioning circuit and the second conditioning circuit in a voltage signal mode; the first conditioning circuit and the second conditioning circuit are used for processing through chopping, amplification and filtering, and sending processed signals to the core processor; the core processor compares signals input by the first conditioning circuit and the second conditioning circuit, and judges whether a voltage difference value exists between a voltage signal obtained by processing the signal acquired by the sensor by the first conditioning circuit and a voltage signal obtained by processing the signal acquired by the sensor by the second conditioning circuit; the core processor outputs signals according to the voltage average value corresponding to the voltage signals obtained after the processing of the first conditioning circuit and the second conditioning circuit; if a voltage difference value exists between the voltage signal obtained after the first conditioning circuit processes the signal collected by the sensor and the voltage signal obtained after the second conditioning circuit processes the signal collected by the sensor, judging whether the voltage difference value is larger than a preset voltage difference threshold value or not; if the voltage difference value does not exceed the voltage difference threshold value, the core processor performs average processing on a voltage signal obtained after the first conditioning circuit processes the signal acquired by the sensor and a voltage signal obtained after the second conditioning circuit processes the signal acquired by the sensor to obtain a final output voltage signal, and performs signal output according to the final output voltage signal; and if the voltage difference value exceeds the voltage difference threshold value, the core processor starts a light and sound warning module to prompt a worker to detect the human body again, simultaneously closes the third conditioning circuit, and judges whether the first conditioning circuit and the second conditioning circuit break down or not through the detection of the third conditioning circuit.
The effect of the above technical scheme is as follows: the embodiment provides an amplification conditioning chip system for biological weak small signals, which can detect and monitor the operation performance of an amplification conditioning circuit in real time in the operation process of the amplification conditioning circuit through the operation mode of three conditioning circuits, effectively improves the operation stability monitoring efficiency of the amplification conditioning circuit in the operation process, and ensures the stability of the whole operation of the amplification conditioning circuit system through the cooperative operation among the three conditioning circuits. On the other hand, the performance detection accuracy of the amplifying conditioning circuit can be effectively improved by utilizing the cooperative operation of different amplifying circuits with different circuit structures but the same amplifying performance indexes, and the problem that the amplifying circuits with the same structures cannot carry out effective performance reference and detection due to performance deviation caused by circuit structure factors is solved.
In an embodiment of the present invention, as shown in fig. 3, the signal conditioning method of the amplification conditioning chip system includes:
step 1, the core processor controls the switch control circuit to enable the first switch and the second switch to be kept in a closed state, and the third switch is kept in an open state;
step 2, the sensor collects data in real time and transmits the collected data to the first conditioning circuit and the second conditioning circuit in a voltage signal mode;
step 3, the first conditioning circuit and the second conditioning circuit are processed through chopping, amplification and filtering, and processed signals are sent to a core processor;
step 4, the core processor compares signals input by the first conditioning circuit and the second conditioning circuit, and judges whether a voltage difference value exists between a voltage signal obtained by processing the signal acquired by the sensor by the first conditioning circuit and a voltage signal obtained by processing the signal acquired by the sensor by the second conditioning circuit; if the voltage difference value does not exist, executing step 5; if the voltage difference value exists, executing step 6;
step 5, the core processor outputs signals according to the voltage average value corresponding to the voltage signals obtained after the processing of the first conditioning circuit and the second conditioning circuit;
step 6, if a voltage difference value exists between a voltage signal obtained after the first conditioning circuit processes the signal acquired by the sensor and a voltage signal obtained after the second conditioning circuit processes the signal acquired by the sensor, judging whether the voltage difference value is larger than a preset voltage difference threshold value or not; if the voltage difference value does not exceed the voltage difference threshold, executing step 7; if the voltage difference value exceeds the voltage difference threshold value, executing step 8;
step 7, the core processor performs average processing on the voltage signal obtained after the signal acquired by the sensor is processed by the first conditioning circuit and the voltage signal obtained after the signal acquired by the sensor is processed by the second conditioning circuit to obtain a final output voltage signal, and performs signal output according to the final output voltage signal;
and 8, starting a light and sound warning module by the core processor to prompt a worker to detect the human body again, closing the third conditioning circuit, and judging whether the first conditioning circuit and the second conditioning circuit break down or not through the detection of the third conditioning circuit.
Wherein, judge whether first conditioning circuit and second conditioning circuit break down through the detection of third conditioning circuit, include:
firstly, the core processor acquires voltage signals processed by a first conditioning circuit, a second conditioning circuit and a third conditioning circuit;
secondly, judging whether the voltage difference value between the voltage signals obtained by the first conditioning circuit and the second conditioning circuit is still larger than the voltage difference threshold value, and if the voltage difference value does not exceed the voltage difference threshold value at the moment, executing a third step; if the voltage difference value still exceeds the voltage difference threshold value at the moment, executing a fourth step;
thirdly, the core processor outputs signals according to the voltage average values corresponding to the voltage signals obtained after the processing of the first conditioning circuit, the second conditioning circuit and the third conditioning circuit;
fourthly, acquiring a voltage signal output by the third conditioning circuit, and respectively acquiring a first voltage difference value between the voltage signal output by the third conditioning circuit and the voltage signal output by the first conditioning circuit, and a second voltage difference value between the voltage signal output by the third conditioning circuit and the voltage signal output by the second conditioning circuit; judging whether the first voltage difference value and the second voltage difference value are smaller than the voltage difference threshold value or not; if one of the first voltage difference value and the second voltage difference value is smaller than a voltage difference threshold value, the conditioning circuit with the voltage difference value smaller than the voltage difference threshold value is determined as a normal operation conditioning circuit, and the conditioning circuit with the voltage difference value larger than the voltage difference threshold value is determined as a fault conditioning circuit; at this time, the core processor controls the switch control circuit to disconnect the switch of the fault conditioning circuit, and the corresponding switches of the normal operation conditioning circuit and the third conditioning circuit are kept in a closed and conductive state; if both the first voltage difference value and the second voltage difference value are smaller than a voltage difference threshold value, judging whether the first voltage difference value and the second voltage difference value are smaller than a second voltage difference threshold value; if one of the first voltage difference value and the second voltage difference value is smaller than the second voltage difference threshold value, the conditioning circuit with the voltage difference value smaller than the second voltage difference threshold value is determined as a normal operation conditioning circuit, and the conditioning circuit with the voltage difference value larger than the second voltage difference threshold value is determined as a fault conditioning circuit; at this time, the core processor controls the switch control circuit to disconnect the switch of the fault conditioning circuit, and the corresponding switches of the normal operation conditioning circuit and the third conditioning circuit are kept in a closed and conductive state.
The effect of the technical scheme is as follows: the embodiment provides an amplification conditioning chip system for biological weak small signals, which can detect and monitor the operation performance of an amplification conditioning circuit in real time in the operation process of the amplification conditioning circuit through the operation mode of three conditioning circuits, effectively improves the operation stability monitoring efficiency of the amplification conditioning circuit in the operation process, and ensures the stability of the whole operation of the amplification conditioning circuit system through the cooperative operation among the three conditioning circuits.
In an embodiment of the present invention, the second voltage difference threshold is obtained by the following formula:
wherein, V1A signal representing a voltage value output by the first conditioning circuit; v2A signal representing a voltage value output by the second conditioning circuit; vy1Representing the voltage difference threshold; vy1Representing the second voltage difference threshold.
The effect of the above technical scheme is as follows: the second voltage difference threshold value obtained by the formula can effectively improve the judgment accuracy and the judgment efficiency of the fault amplification conditioning circuit. Meanwhile, the second voltage difference threshold obtained by the formula can be adaptively adjusted according to the voltage signal detection conditions of the actual first conditioning circuit and the actual second conditioning circuit, so that the matching performance of the second voltage difference threshold setting with the voltage signal detection of the actual first conditioning circuit and the actual second conditioning circuit is effectively improved, the reasonability of the second voltage difference threshold setting is improved, and the accuracy of performance detection of the first conditioning circuit and the second conditioning circuit can be greatly improved.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. The amplification conditioning chip system for the biological weak small signals is characterized by comprising a sensor, a switch group, a switch control circuit, a conditioning circuit group, a core processor and a light and sound warning module; the signal output end of the sensor is electrically connected with the conditioning circuit group through a switch group respectively; the signal output ends of the conditioning circuit groups are respectively connected with the core processor; the core processor is electrically connected with the switch control circuit and the light and sound warning module respectively.
2. The amplified conditioning chip system of claim 1, wherein the set of conditioning circuits comprises a first conditioning circuit, a second conditioning circuit, and a third conditioning circuit; and the signal output end of the sensor is respectively connected with the signal input ends of the first conditioning circuit, the second conditioning circuit and the third conditioning circuit through a switch group.
3. The amplified conditioning chip system of claim 2, wherein the switch bank comprises a first switch, a second switch, and a third switch.
4. The amplified conditioning chip system of claim 3, wherein the signal output terminal of the sensor is connected to the signal input terminals of the first conditioning circuit, the second conditioning circuit, and the third conditioning circuit through a first switch, a second switch, and a third switch, respectively; the signal output ends of the first conditioning circuit, the second conditioning circuit and the third conditioning circuit are respectively connected with the detection signal input end of the core processor; the alarm control signal output end of the core processor is connected with the control signal input end of the light and sound warning module; the switch control signal output end of the core processor is connected with the control signal input end of the switch control circuit; and the control signal output end of the switch control circuit is respectively connected with the control signal input ends of the first switch, the second switch and the third switch.
5. The amplification conditioning chip system of claim 2, wherein the first conditioning circuit comprises a primary chopper circuit, an amplification circuit, a secondary chopper circuit, and a filter circuit; the signal input end of the primary chopper circuit is the signal input end of the first conditioning circuit; the signal output end of the primary chopper circuit is connected with the signal input end of the amplifying circuit; the signal output end of the amplifying circuit is connected with the signal input end of the secondary chopper circuit; the signal output end of the secondary chopper circuit is connected with the signal input end of the filter circuit; and the signal output end of the filter circuit is connected with the detection signal input end of the core processor, and the signal output end of the filter circuit is the signal output end of the first conditioning circuit.
6. The amplification conditioning chip system of claim 2, wherein the second conditioning circuit comprises a primary chopper circuit, an amplification circuit, a secondary chopper circuit, and a filter circuit; the signal input end of the primary chopper circuit is the signal input end of the first conditioning circuit; the signal output end of the primary chopper circuit is connected with the signal input end of the amplifying circuit; the signal output end of the amplifying circuit is connected with the signal input end of the secondary chopper circuit; the signal output end of the secondary chopper circuit is connected with the signal input end of the filter circuit; and the signal output end of the filter circuit is connected with the detection signal input end of the core processor, and the signal output end of the filter circuit is the signal output end of the second conditioning circuit.
7. The amplification conditioning chip system of claim 2, wherein the third conditioning circuit comprises a first chopper circuit, a first stage amplification filter circuit, a second chopper circuit, and a second stage amplification filter circuit; the signal input end of the first chopper circuit is the signal input end of the third conditioning circuit; the signal output end of the first chopper circuit is connected with the signal input end of the first-stage amplification filter circuit, and the signal output end of the first-stage amplification filter circuit is connected with the signal input end of the second chopper circuit; the signal output end of the second chopper circuit is connected with the signal input end of the second-stage amplification filter circuit; and the signal output end of the second-stage amplification filter circuit is the signal output end of the third conditioning circuit and is connected with the detection signal input end of the core processor.
8. The amplified conditioning chip system of claim 2, wherein the signal processing amplification of the first conditioning circuit, the second conditioning circuit, and the third conditioning circuit is consistent with a signal processing standard.
9. The amplification conditioning chip system of claim 8, wherein the signal conditioning method of the amplification conditioning chip system comprises:
step 1, the core processor controls the switch control circuit to enable the first switch and the second switch to be kept in a closed state, and the third switch is kept in an open state;
step 2, the sensor collects data in real time and transmits the collected data to the first conditioning circuit and the second conditioning circuit in a voltage signal mode;
step 3, the first conditioning circuit and the second conditioning circuit are processed through chopping, amplification and filtering, and processed signals are sent to a core processor;
step 4, the core processor compares signals input by the first conditioning circuit and the second conditioning circuit, and judges whether a voltage difference value exists between a voltage signal obtained by processing the signal acquired by the sensor by the first conditioning circuit and a voltage signal obtained by processing the signal acquired by the sensor by the second conditioning circuit; if the voltage difference value does not exist, executing step 5; if the voltage difference value exists, executing step 6;
step 5, the core processor outputs signals according to the voltage average value corresponding to the voltage signals obtained after the processing of the first conditioning circuit and the second conditioning circuit;
step 6, if a voltage difference value exists between a voltage signal obtained after the first conditioning circuit processes the signal acquired by the sensor and a voltage signal obtained after the second conditioning circuit processes the signal acquired by the sensor, judging whether the voltage difference value is larger than a preset voltage difference threshold value or not; if the voltage difference value does not exceed the voltage difference threshold, executing step 7; if the voltage difference value exceeds the voltage difference threshold value, executing step 8;
step 7, the core processor performs average processing on the voltage signal obtained after the signal acquired by the sensor is processed by the first conditioning circuit and the voltage signal obtained after the signal acquired by the sensor is processed by the second conditioning circuit to obtain a final output voltage signal, and performs signal output according to the final output voltage signal;
and 8, starting a light and sound warning module by the core processor to prompt a worker to detect the human body again, closing the third conditioning circuit, and judging whether the first conditioning circuit and the second conditioning circuit break down or not through the detection of the third conditioning circuit.
10. The amplified conditioning chip system of claim 9, wherein determining whether the first conditioning circuit and the second conditioning circuit are malfunctioning through detection by the third conditioning circuit comprises:
firstly, the core processor acquires voltage signals processed by a first conditioning circuit, a second conditioning circuit and a third conditioning circuit;
secondly, judging whether the voltage difference value between the voltage signals obtained by the first conditioning circuit and the second conditioning circuit is still larger than the voltage difference threshold value, and if the voltage difference value does not exceed the voltage difference threshold value at the moment, executing a third step; if the voltage difference value still exceeds the voltage difference threshold value at the moment, executing a fourth step;
thirdly, the core processor outputs signals according to the voltage average values corresponding to the voltage signals obtained after the processing of the first conditioning circuit, the second conditioning circuit and the third conditioning circuit;
fourthly, acquiring a voltage signal output by the third conditioning circuit, and respectively acquiring a first voltage difference value between the voltage signal output by the third conditioning circuit and the voltage signal output by the first conditioning circuit, and a second voltage difference value between the voltage signal output by the third conditioning circuit and the voltage signal output by the second conditioning circuit; judging whether the first voltage difference value and the second voltage difference value are smaller than the voltage difference threshold value or not; if one of the first voltage difference value and the second voltage difference value is smaller than a voltage difference threshold value, the conditioning circuit with the voltage difference value smaller than the voltage difference threshold value is determined as a normal operation conditioning circuit, and the conditioning circuit with the voltage difference value larger than the voltage difference threshold value is determined as a fault conditioning circuit; at this time, the core processor controls the switch control circuit to disconnect the switch of the fault conditioning circuit, and the corresponding switches of the normal operation conditioning circuit and the third conditioning circuit are kept in a closed and conductive state; if both the first voltage difference value and the second voltage difference value are smaller than a voltage difference threshold value, judging whether the first voltage difference value and the second voltage difference value are smaller than a second voltage difference threshold value; if one of the first voltage difference value and the second voltage difference value is smaller than the second voltage difference threshold value, the conditioning circuit with the voltage difference value smaller than the second voltage difference threshold value is determined as a normal operation conditioning circuit, and the conditioning circuit with the voltage difference value larger than the second voltage difference threshold value is determined as a fault conditioning circuit; at this time, the core processor controls the switch control circuit to disconnect the switch of the fault conditioning circuit, and the corresponding switches of the normal operation conditioning circuit and the third conditioning circuit are kept in a closed and conductive state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111533873.5A CN114217210B (en) | 2021-12-15 | 2021-12-15 | Amplification conditioning chip system for biological weak and small signals |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111533873.5A CN114217210B (en) | 2021-12-15 | 2021-12-15 | Amplification conditioning chip system for biological weak and small signals |
Publications (2)
| Publication Number | Publication Date |
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| CN114217210A true CN114217210A (en) | 2022-03-22 |
| CN114217210B CN114217210B (en) | 2023-06-20 |
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| CN114217210B (en) | 2023-06-20 |
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