CN114217210B - Amplification conditioning chip system for biological weak and small signals - Google Patents
Amplification conditioning chip system for biological weak and small signals Download PDFInfo
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Abstract
The invention provides an amplification conditioning chip system of biological weak and small signals, which comprises a sensor, a switch group, a switch control circuit, a conditioning circuit group, a core processor and a lamplight sound warning module, wherein the sensor is connected with the switch group; the signal output end of the sensor is electrically connected with the conditioning circuit group through the 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 lamplight sound warning module respectively.
Description
Technical Field
The invention provides an amplification conditioning chip system for biological weak and small signals, and belongs to the technical field of sensing.
Background
In recent years, the rapid development of sensing technology has created advantages for human attention to self physiological signals. The accurate acquisition of physiological signals such as electrocardio, electroencephalogram, myoelectricity and blood pressure ensures that medical research and diagnosis have effective information support and promote the development of modern medicine. In addition, the acquisition and analysis of the brain electrical signals can also realize a series of brain control systems and products, and can be widely applied to the fields of military, aerospace, industry, entertainment and the like. However, the existing amplifying and conditioning circuit for the biological weak small signal often has the problem of unstable operation of the amplifying and conditioning circuit.
Disclosure of Invention
The invention provides a biological weak and small signal amplifying and conditioning chip system which is used for solving the problem that the traditional biological weak and small signal amplifying and conditioning circuit is unstable in operation:
the system comprises a sensor for detecting biological weak small signals, a switch group, a switch control circuit, a conditioning circuit group, a core processor and a lamplight sound warning module; the signal output end of the sensor is electrically connected with the conditioning circuit group through the 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 lamplight sound warning module respectively.
Further, the conditioning circuit group comprises a first conditioning circuit, a second conditioning circuit and a third conditioning circuit; 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 group includes a first switch, a second switch, and a third switch.
Further, 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 lamplight sound alarm 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.
Further, 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; 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.
Further, 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 first-stage chopper circuit is the signal input end of the second 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; 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.
Further, the third conditioning circuit comprises a first chopper circuit, a first-stage amplifying and filtering circuit, a second chopper circuit and a second-stage amplifying and filtering 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 primary amplifying and filtering circuit; the signal output end of the primary amplifying and filtering 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 secondary amplifying and filtering circuit; the signal output end of the second-stage amplifying and filtering 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 factors and the signal processing standards of the first conditioning circuit, the second conditioning circuit and the third conditioning circuit are kept consistent.
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 to be kept in an open state;
step 2, the sensor collects data in real time, and the collected data is transmitted to a first conditioning circuit and a second conditioning circuit in a voltage signal mode;
step 3, the first conditioning circuit and the second conditioning circuit are processed through chopping, amplifying 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 after the first conditioning circuit processes the signals acquired by the sensor and a voltage signal obtained after the second conditioning circuit processes the signals acquired by the sensor; 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 average voltage value corresponding to the obtained voltage signals after the processing of the first conditioning circuit and the second conditioning circuit;
step 6, 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, executing step 7; if the voltage difference value exceeds the voltage difference threshold value, executing step 8;
step 7, the core processor processes 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 to obtain a final output voltage signal, and outputs the signal according to the final output voltage signal;
and 8, starting a lamplight 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 have faults or not through the detection of the third conditioning circuit.
Further, determining whether the first conditioning circuit and the second conditioning circuit fail through detection of the third conditioning circuit includes:
the first step, the core processor acquires voltage signals processed by a first conditioning circuit, a second conditioning circuit and a third conditioning circuit;
a second step of 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 executing a third step if the voltage difference value does not exceed the voltage difference threshold value at the moment; if the voltage difference value still exceeds the voltage difference threshold value at the moment, executing a fourth step;
step three, the core processor outputs signals according to the average voltage value corresponding to the voltage signals obtained after the processing of the first conditioning circuit, the second conditioning circuit and the third conditioning circuit;
a fourth step of 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 considered to be a normal operation conditioning circuit, and the conditioning circuit with the voltage difference value larger than the voltage difference threshold value is considered to be a fault conditioning circuit; at this time, the core processor controls the switch control circuit to switch off the switch of the fault conditioning circuit, and keeps the corresponding switches of the normal operation conditioning circuit and the third conditioning circuit in a closed and conductive state; if the first voltage difference value and the second voltage difference value are smaller than the voltage difference threshold value, judging whether the first voltage difference value and the second voltage difference value are smaller than the second voltage difference threshold value or not; if one of the first voltage difference value and the second voltage difference value is smaller than the second voltage difference threshold, determining that the conditioning circuit with the voltage difference value smaller than the second voltage difference threshold is a normal operation conditioning circuit, and determining that the conditioning circuit with the voltage difference value larger than the second voltage difference threshold is a fault conditioning circuit; at this time, the core processor controls the switch control circuit to switch off the switch of the fault conditioning circuit, and keeps the corresponding switches of the normal operation conditioning circuit and the third conditioning circuit in a closed and conductive state.
Wherein the second voltage difference threshold is obtained by the following formula:
wherein,,V 1 a voltage value signal representing the output of the first conditioning circuit;V 2 a voltage value signal representing the output of the second conditioning circuit;V y1 representing the voltage difference threshold;V y1 representing the second voltage difference threshold.
The invention has the beneficial effects that:
the invention provides an amplifying and conditioning chip system for biological weak and small signals, which can detect and monitor the operation performance of an amplifying and conditioning circuit in real time in the operation process of the amplifying and conditioning circuit in a three-conditioning circuit operation mode, effectively improve the operation stability monitoring efficiency of the amplifying and conditioning circuit in the operation process, and ensure the overall operation stability of the amplifying and conditioning circuit system through the cooperative operation among the three conditioning circuits.
Drawings
FIG. 1 is a schematic diagram of a system of an amplifying and conditioning chip system according to the present invention;
FIG. 2 is a second system schematic diagram of the amplifying and conditioning chip system according to the present invention;
fig. 3 is a flowchart of an amplifying and conditioning method of the amplifying and conditioning chip system according to the present invention.
Detailed Description
The preferred embodiments of the present invention will be described below with reference to the accompanying drawings, it being understood that the preferred embodiments described herein are for illustration and explanation of the present invention only, and are not intended to limit the present invention.
The invention provides an amplification conditioning chip system of biological weak small signals, which is shown in fig. 1 and 2, and comprises a sensor, a switch group, a switch control circuit, a conditioning circuit group, a core processor and a lamplight 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 the 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 lamplight sound warning module respectively.
The conditioning circuit group comprises a first conditioning circuit, a second conditioning circuit and a third conditioning circuit; 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 group 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 lamplight sound alarm 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; 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 first-stage chopper circuit is the signal input end of the second 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; 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 amplifying and filtering circuit, a second chopper circuit and a second-stage amplifying and filtering 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 primary amplifying and filtering circuit; the signal output end of the primary amplifying and filtering 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 secondary amplifying and filtering circuit; the signal output end of the second-stage amplifying and filtering 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 and the signal processing standards of the first conditioning circuit, the second conditioning circuit and the third conditioning circuit are kept consistent.
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 to be 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 form; the first conditioning circuit and the second conditioning circuit are used for processing through chopping, amplifying and filtering, and transmitting 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 after the first conditioning circuit processes the signals acquired by the sensor and a voltage signal obtained after the second conditioning circuit processes the signals acquired by the sensor; the core processor outputs signals according to the average voltage value corresponding to the obtained voltage signals after the processing of the first conditioning circuit and the second conditioning circuit; if a voltage difference value exists between a voltage signal obtained after the first conditioning circuit processes the signal collected by the sensor and a 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 value 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, so as to obtain a final output voltage signal, and performs signal output according to the final output voltage signal; if the voltage difference value exceeds the voltage difference threshold value, the core processor starts a lamplight sound warning module to prompt a worker to detect the human body again, and simultaneously closes the third conditioning circuit, and whether the first conditioning circuit and the second conditioning circuit have faults is judged through the detection of the third conditioning circuit.
The technical scheme has the effects that: the embodiment provides an amplifying and conditioning chip system for biological weak and small signals, which can detect and monitor the operation performance of an amplifying and conditioning circuit in real time in the operation process of the amplifying and conditioning circuit through the operation modes of three conditioning circuits, effectively improves the operation stability monitoring efficiency of the amplifying and conditioning circuit in the operation process, and ensures the overall operation stability of the amplifying and conditioning circuit system through the cooperative operation among the three conditioning circuits. On the other hand, the accuracy of detecting the performance of the amplifying and conditioning circuit can be effectively improved by utilizing the cooperative operation among different amplifying circuits with different circuit structures and the same amplifying performance index, and the problem that the amplifying circuits with the same structure cannot perform effective performance reference and detection due to performance deviation caused by circuit structure factors is prevented.
In one embodiment of the present invention, as shown in fig. 3, the signal conditioning method of the amplifying and 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 to be kept in an open state;
step 2, the sensor collects data in real time, and the collected data is transmitted to a first conditioning circuit and a second conditioning circuit in a voltage signal mode;
step 3, the first conditioning circuit and the second conditioning circuit are processed through chopping, amplifying 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 after the first conditioning circuit processes the signals acquired by the sensor and a voltage signal obtained after the second conditioning circuit processes the signals acquired by the sensor; 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 average voltage value corresponding to the obtained voltage signals after the processing of the first conditioning circuit and the second conditioning circuit;
step 6, 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, executing step 7; if the voltage difference value exceeds the voltage difference threshold value, executing step 8;
step 7, the core processor processes 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 to obtain a final output voltage signal, and outputs the signal according to the final output voltage signal;
and 8, starting a lamplight 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 have faults 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:
the first step, the core processor acquires voltage signals processed by a first conditioning circuit, a second conditioning circuit and a third conditioning circuit;
a second step of 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 executing a third step if the voltage difference value does not exceed the voltage difference threshold value at the moment; if the voltage difference value still exceeds the voltage difference threshold value at the moment, executing a fourth step;
step three, the core processor outputs signals according to the average voltage value corresponding to the voltage signals obtained after the processing of the first conditioning circuit, the second conditioning circuit and the third conditioning circuit;
a fourth step of 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 considered to be a normal operation conditioning circuit, and the conditioning circuit with the voltage difference value larger than the voltage difference threshold value is considered to be a fault conditioning circuit; at this time, the core processor controls the switch control circuit to switch off the switch of the fault conditioning circuit, and keeps the corresponding switches of the normal operation conditioning circuit and the third conditioning circuit in a closed and conductive state; if the first voltage difference value and the second voltage difference value are smaller than the voltage difference threshold value, judging whether the first voltage difference value and the second voltage difference value are smaller than the second voltage difference threshold value or not; if one of the first voltage difference value and the second voltage difference value is smaller than the second voltage difference threshold, determining that the conditioning circuit with the voltage difference value smaller than the second voltage difference threshold is a normal operation conditioning circuit, and determining that the conditioning circuit with the voltage difference value larger than the second voltage difference threshold is a fault conditioning circuit; at this time, the core processor controls the switch control circuit to switch off the switch of the fault conditioning circuit, and keeps the corresponding switches of the normal operation conditioning circuit and the third conditioning circuit in a closed and conductive state.
The technical scheme has the effects that: the embodiment provides an amplifying and conditioning chip system for biological weak and small signals, which can detect and monitor the operation performance of an amplifying and conditioning circuit in real time in the operation process of the amplifying and conditioning circuit through the operation modes of three conditioning circuits, effectively improves the operation stability monitoring efficiency of the amplifying and conditioning circuit in the operation process, and ensures the overall operation stability of the amplifying and conditioning circuit system through the cooperative operation among the three conditioning circuits.
In one embodiment of the present invention, the second voltage difference threshold is obtained by the following formula:
wherein,,V 1 a voltage value signal representing the output of the first conditioning circuit;V 2 a voltage value signal representing the output of the second conditioning circuit;V y1 representing the voltage difference threshold;V y1 representing the second voltage difference threshold.
The technical scheme has the effects that: the second voltage difference threshold value obtained through 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 through the formula can be adaptively adjusted according to the voltage signal detection conditions of the actual first conditioning circuit and the second conditioning circuit, so that the matching property of the second voltage difference threshold setting and the voltage signal detection of the actual first conditioning circuit and the actual second conditioning circuit is effectively improved, the rationality of the second voltage difference threshold setting is further improved, and the accuracy of the 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 modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (6)
1. The system is characterized by comprising a sensor, a switch group, a switch control circuit, a conditioning circuit group, a core processor and a lamplight sound warning module; the signal output end of the sensor is electrically connected with the conditioning circuit group through the switch group respectively; the signal output ends of the conditioning circuit groups are respectively connected with the core processor; the core processor is respectively and electrically connected with the switch control circuit and the lamplight sound warning module;
the conditioning circuit group comprises a first conditioning circuit, a second conditioning circuit and a third conditioning circuit; 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 group comprises a first switch, a second switch and a third switch;
the signal processing amplification factors and the signal processing standards of the first conditioning circuit, the second conditioning circuit and the third conditioning circuit are kept consistent;
the signal conditioning method of the amplifying and 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 to be kept in an open state;
step 2, the sensor collects data in real time, and the collected data is transmitted to a first conditioning circuit and a second conditioning circuit in a voltage signal mode;
step 3, the first conditioning circuit and the second conditioning circuit are processed through chopping, amplifying 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 after the first conditioning circuit processes the signals acquired by the sensor and a voltage signal obtained after the second conditioning circuit processes the signals acquired by the sensor; 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 average voltage value corresponding to the obtained voltage signals after the processing of the first conditioning circuit and the second conditioning circuit;
step 6, 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, executing step 7; if the voltage difference value exceeds the voltage difference threshold value, executing step 8;
step 7, the core processor processes 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 to obtain a final output voltage signal, and outputs the signal according to the final output voltage signal;
and 8, starting a lamplight 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 have faults or not through the detection of the third conditioning circuit.
2. The amplification conditioning chip system of claim 1, wherein the signal output end of the sensor is connected to 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, 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 lamplight sound alarm 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.
3. The amplification conditioning chip system of claim 1, 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; 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.
4. The amplification conditioning chip system of claim 1, 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 first-stage chopper circuit is the signal input end of the second 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; 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.
5. The amplification conditioning chip system of claim 1, wherein the third conditioning circuit comprises a first chopper circuit, a primary amplification filter circuit, a second chopper circuit, and a secondary 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 primary amplifying and filtering circuit; the signal output end of the primary amplifying and filtering 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 secondary amplifying and filtering circuit; the signal output end of the second-stage amplifying and filtering circuit is the signal output end of the third conditioning circuit and is connected with the detection signal input end of the core processor.
6. The amplification conditioning chip system of claim 1, wherein determining whether the first conditioning circuit and the second conditioning circuit are malfunctioning through detection by the third conditioning circuit comprises:
the first step, the core processor acquires voltage signals processed by a first conditioning circuit, a second conditioning circuit and a third conditioning circuit;
a second step of 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 executing a third step if the voltage difference value does not exceed the voltage difference threshold value at the moment; if the voltage difference value still exceeds the voltage difference threshold value at the moment, executing a fourth step;
step three, the core processor outputs signals according to the average voltage value corresponding to the voltage signals obtained after the processing of the first conditioning circuit, the second conditioning circuit and the third conditioning circuit;
a fourth step of 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 considered to be a normal operation conditioning circuit, and the conditioning circuit with the voltage difference value larger than the voltage difference threshold value is considered to be a fault conditioning circuit; at this time, the core processor controls the switch control circuit to switch off the switch of the fault conditioning circuit, and keeps the corresponding switches of the normal operation conditioning circuit and the third conditioning circuit in a closed and conductive state; if the first voltage difference value and the second voltage difference value are smaller than the voltage difference threshold value, judging whether the first voltage difference value and the second voltage difference value are smaller than the second voltage difference threshold value or not; if one of the first voltage difference value and the second voltage difference value is smaller than the second voltage difference threshold, determining that the conditioning circuit with the voltage difference value smaller than the second voltage difference threshold is a normal operation conditioning circuit, and determining that the conditioning circuit with the voltage difference value larger than the second voltage difference threshold is a fault conditioning circuit; at this time, the core processor controls the switch control circuit to switch off the switch of the fault conditioning circuit, and keeps the corresponding switches of the normal operation conditioning circuit and the third conditioning circuit in a closed and conductive state.
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| CN2793735Y (en) * | 2005-03-31 | 2006-07-05 | 北京德通利达机车科技发展有限公司 | High-voltage inspection alaraming device |
| JP5233882B2 (en) * | 2009-07-10 | 2013-07-10 | 富士通株式会社 | Chopper amplifier |
| CN103308183B (en) * | 2013-05-31 | 2015-10-14 | 中国科学院微电子研究所 | Reading circuit for sensor |
| CN104485914A (en) * | 2014-11-27 | 2015-04-01 | 苏州市玮琪生物科技有限公司 | Detection and processing circuit for biological weak signal |
| CN106160671B (en) * | 2015-04-10 | 2019-03-15 | 无锡华润上华科技有限公司 | Signal amplification circuit |
| CN105322898B (en) * | 2015-11-26 | 2018-12-11 | 深圳先进技术研究院 | Preamplifier and signal pickup assembly |
| CN105897248B (en) * | 2016-03-30 | 2018-07-03 | 中国科学院微电子研究所 | Weak signal reading circuit |
| EP3790191B1 (en) * | 2016-04-22 | 2022-05-04 | Goodix Technology (HK) Company Limited | Amplifiers |
| CN107994883A (en) * | 2017-12-27 | 2018-05-04 | 山东师范大学 | A kind of chopper amplification conditioning chip system of the faint small-signal of human-body biological |
| CN108344888B (en) * | 2018-01-26 | 2020-07-10 | 中国人民解放军战略支援部队信息工程大学 | Circuit transmission-based small signal circuit detection device and method in communication line |
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