CN210071867U - Magneto-electric sensor state self-checking system and circuit - Google Patents
Magneto-electric sensor state self-checking system and circuit Download PDFInfo
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- CN210071867U CN210071867U CN201920550379.1U CN201920550379U CN210071867U CN 210071867 U CN210071867 U CN 210071867U CN 201920550379 U CN201920550379 U CN 201920550379U CN 210071867 U CN210071867 U CN 210071867U
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Abstract
The utility model discloses a state self-checking system of a magnetoelectric sensor, which comprises a magnetoelectric sensor to be detected, a first operational amplifier, a second operational amplifier, a signal conversion module, a signal processing module and a warning module; the output end of the coil of the magnetoelectric sensor to be detected is respectively connected with the input end of the first operational amplifier and the input end of the second operational amplifier, the output end of the first operational amplifier and the output end of the second operational amplifier are respectively connected with the input end of the signal conversion module, the output end of the signal conversion module is connected with the input end of the signal processing module, and the output end of the signal processing module is connected with the input end of the warning module. The utility model also discloses a magnetoelectric sensor state self-checking circuit. The utility model discloses gather voltage signal and waveform signal simultaneously and carry out the self-checking and the judgement of sensor state, need not to transfer the sensor to the laboratory examination, can realize examining and determine at the job site.
Description
Technical Field
The utility model relates to a sensor technical field, concretely relates to magnetoelectric sensor state self-checking system and circuit.
Background
A magnetoelectric sensor is a type of sensor that outputs an electric signal related to a rotation speed by sensing a change in a magnetic field. The magnetoelectric sensor is generally used for calculating the speed and acceleration of a moving object, and is widely applied to various systems such as a train control system, a brake system, a traction system of a locomotive, an ABS system of an automobile, and the like.
At present, when a user uses the device, when the measurement display data of the device changes, the situation of the device is truly reflected or the situation is changed due to the fault of a sensor, the user cannot judge the situation and needs an experienced engineer to further check the situation, so that the decision-making difficulty of the user is improved, and the workload is increased; or the sensor can be detached only during shutdown maintenance, a standard signal is applied to the sensor through the large-scale vibration table, data such as linearity and frequency response of the sensor are measured, and compared with standard parameters to obtain an error value, so that whether the sensor is normal or not is judged. However, a user site does not have a vibration table detection device, and cannot regularly detect the sensor; in the using process of the sensor, operation is forbidden, and only when the sensor is shut down or problems occur, protection can be removed, the sensor is detected, so that a user cannot judge an accident condition in advance, and unnecessary loss is caused; therefore, it is important that the sensors perform reliable self-tests as key components of these systems.
Disclosure of Invention
An object of the utility model is to overcome the defect that exists among the prior art, provide a magnetoelectric sensor state self-checking system and circuit, this self-checking system can detect the sensor at the in-process of sensor work, need not to transfer the sensor to the laboratory, can realize accurate examination at the job site.
In order to achieve the above object, the technical solution of the present invention is to design a state self-checking system for a magnetoelectric sensor, which comprises a magnetoelectric sensor to be measured, a first operational amplifier, a second operational amplifier, a signal conversion module part, a signal processing module part and a warning module part; the two ends of the coil of the magnetoelectric sensor to be detected are equally divided and are respectively connected with the input end of the first operational amplifier and the input end of the second operational amplifier, the output end of the first operational amplifier and the output end of the second operational amplifier are respectively connected with the input end of the signal conversion module part, the output end of the signal conversion module part is connected with the input end of the signal processing module part, and the output end of the signal processing module part is connected with the input end of the warning module part.
When the sensor state self-checking system works, alternating voltage signals at two ends of a coil of a sensor to be detected are amplified by the first amplifier and then are collected by the signal conversion module for digital quantization processing, then quantization signals processed by the signal conversion module are input to the signal processing module and compared with sine waveforms of the sensor to be detected during normal working, the signal processing module controls the warning module to give out warning, and workers are provided for overhauling or replacing the sensor. Or directly collecting the voltage at two ends of the sensor coil, amplifying the voltage by the second amplifier to obtain direct current voltage, collecting the direct current voltage by the signal conversion module, performing digital quantization processing, inputting the quantized signal processed by the signal conversion module into the signal processing module, comparing the quantized signal with a voltage signal of the sensor to be detected when the sensor normally works, and judging that the sensor and the instrument are disconnected when the working voltage signal of the sensor is greater than a preset value; and when the working voltage signal of the sensor is smaller than a preset value, judging that short circuit occurs between circuits of the sensor. The voltage acquisition circuit acquires once in 200ms, and the waveform acquisition circuit acquires once in 20 ms. The utility model provides a self-checking system need not to transfer the sensor that awaits measuring to laboratory examination, can realize examining and determine at the job site, makes the user can judge the unexpected condition in advance, reduces the unnecessary loss.
Preferably, the signal conversion module is a chip having a plurality of input ports. The multiple input ports of the signal conversion module can simultaneously acquire and input multiple signals of the sensor to be detected, so that the state of the sensor is judged from multiple aspects, and the accuracy of judging the state of the sensor is improved.
A further preferred technical solution is that a first voltage follower is connected between the output terminal of the first operational amplifier and the input terminal of the signal conversion module part. The voltage signal amplified by the first operational amplifier is subjected to voltage signal stabilization processing through the first voltage follower, so that the output voltage waveform signal of the sensor to be detected is more accurate, and the detection accuracy of the sensor is further ensured.
A further preferred technical solution is that the second operational amplifier further has a second output terminal, and a second voltage follower is connected between the second output terminal and the input terminal of the signal conversion module part. The voltage signal acquisition of the sensor is simultaneously acquired through the two output ends and input to the signal conversion module, and a second voltage follower is arranged between the second output end and the signal conversion module, so that the signal output by the first output end of the second operational amplifier and the signal output by the second output end of the second operational amplifier are mutually verified, the accuracy and precision of the signal output by the second operational amplifier are ensured, and the open circuit or open circuit fault of the sensor is further accurately judged.
The further preferred technical scheme is that the CPU is connected with a power supply; the warning module part comprises an acousto-optic warning lamp arranged on an instrument connected with the magnetoelectric sensor to be detected. The acousto-optic warning lamp directly connected with the instrument can visually remind field workers.
Further preferred technical solution is that the warning module part further comprises a remote display device connected with the CPU processor. The remote display device can be arranged in the main control room, so that an engineer in the main control room can conveniently pre-judge the field condition.
Further preferably, the remote display system is a human-computer interaction true color touch liquid crystal display connected with the CPU processor. The CPU processor can analyze the performance of the sensor in real time, the man-machine interaction true color touch display can generate a sensor performance curve by data received by the CPU processor and an analysis result and display the sensor performance curve on the man-machine interaction display, workers far away from an instrument working site can more visually pre-judge the problems of the sensor, the dynamic development trend of the sensor and give early warning to a user in advance according to the sensor performance curve, instead of giving a warning when the sensor fails, the user can timely maintain the sensor, so that the normal operation of main equipment is guaranteed, and the loss of the user is reduced.
The further preferred technical scheme is that the CPU processor is ATmega16 in model, and the power supply of the CPU processor is a 5V power supply.
The utility model also provides a magnetoelectric sensor state self-checking circuit, which comprises a signal generating circuit, a signal amplifier circuit, a voltage follower circuit, a signal conversion module circuit, a CPU processor and a warning module; the signal amplifier circuit comprises a first amplifier circuit and a second amplifier circuit, and the first amplifier circuit and the second amplifier circuit have the same structure and respectively and independently work; the voltage follower circuit comprises a first voltage follower circuit and a second voltage follower circuit, and the first voltage follower circuit and the second voltage follower circuit have the same structure and respectively and independently work; the two ends of a coil of the magnetoelectric sensor to be detected are respectively connected with a first amplifying electrical circuit and a second amplifier circuit, an output branch of the first amplifier circuit is connected with a first voltage follower circuit, and an output branch of the second amplifier circuit is connected with a signal conversion module circuit or the second amplifier circuit is connected with the second voltage follower circuit and then connected with the signal conversion module circuit; the output branch of the first voltage follower circuit, the output branch of the second amplifier circuit and the output branch of the second voltage follower circuit are respectively connected with different input ports of the signal conversion module circuit; the signal conversion module circuit is connected with an input port of the CPU processor, the CPU processor processes, analyzes and processes signals of the signal conversion module circuit, compares and analyzes the signals, and determines whether to send a control signal to the warning module or not according to an analysis result.
The utility model has the advantages and the beneficial effects that: the magneto-electric sensor state self-checking system and the magneto-electric sensor state self-checking circuit can perform self-checking and judgment on the state of the sensor by simultaneously acquiring the voltage signal and the waveform signal of the sensor in the working process of the sensor, the sensor to be detected does not need to be transferred to a laboratory for verification, the verification can be realized on a working site, a user can judge an accident condition in advance, and unnecessary loss is reduced; the multi-input port of the signal conversion module can simultaneously acquire and input various signals of the sensor to be detected, judge the state of the sensor from multiple aspects and improve the accuracy of judging the state of the sensor; the voltage signal amplified by the first operational amplifier is subjected to voltage signal stabilization processing through the first voltage follower, so that the output voltage waveform signal of the sensor to be detected is more accurate, and the detection accuracy of the sensor is further ensured; voltage signals of the sensor are acquired through two output ends simultaneously and are input to the signal conversion module, a second voltage follower is arranged between the second output end and the signal conversion module, so that the signals output by the first output end and the second output end of the second operational amplifier are verified mutually, the signals output by the second operational amplifier are ensured to be accurate and precise, and the open circuit or open circuit fault of the sensor is further accurately judged; the remote display device connected with the CPU processor can be arranged in the main control room, so that an engineer in the main control room can conveniently pre-judge the field condition; the CPU processor can analyze the performance of the sensor in real time, the man-machine interaction display generates a sensor performance curve according to data received by the CPU processor and an analysis result and displays the sensor performance curve on the man-machine interaction display, and workers far away from an instrument working site can more visually pre-judge the problems of the sensor and the dynamic development trend of the sensor and give early warning to a user in advance according to the sensor performance curve instead of giving a warning when the sensor fails, so that the user can timely maintain the sensor, the normal operation of main equipment is guaranteed, and the loss of the user is reduced.
Drawings
Fig. 1 is a schematic structural diagram of a state self-checking system of the magnetoelectric sensor of the present invention;
fig. 2 is a waveform acquisition circuit diagram of the magnetoelectric sensor of the present invention;
fig. 3 is the voltage acquisition circuit diagram of the magnetoelectric sensor of the present invention.
In the figure: 1. a coil; 2. a first operational amplifier; 3. a second operational amplifier; 4. a signal conversion module section; 5. a signal processing module section; 6. a warning module part; 7. a first voltage follower; 8. a second voltage follower; 9. a CPU power supply; 10. a human-computer interaction display.
Detailed Description
The following description will further describe embodiments of the present invention with reference to the accompanying drawings and examples. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
As shown in fig. 1, the utility model relates to a state self-checking system for magnetoelectric sensor, which comprises a coil 1 of the magnetoelectric sensor to be measured, a first operational amplifier 2, a second operational amplifier 3, a signal conversion module part 4, a signal processing module part 5 and a warning module part 6; the two ends of the coil are connected with the input end of the first operational amplifier and the input end of the second operational amplifier respectively, the output end of the first operational amplifier and the output end of the second operational amplifier are connected with the input end of the signal conversion module part respectively, the output end of the signal conversion module part is connected with the input end of the signal processing module part, and the output end of the signal processing module part is connected with the input end of the warning module part.
A first voltage follower 7 is connected between the output end of the first operational amplifier and the input end of the signal conversion module part.
The second operational amplifier also has a second output terminal, and a second voltage follower 8 is connected between the second output terminal and the input terminal of the signal conversion module part.
The signal processing module part is a CPU processor, and the CPU is connected with a CPU power supply 9; the warning module part comprises an acousto-optic warning lamp arranged on an instrument connected with the magnetoelectric sensor to be detected.
The warning module part also comprises a remote display device connected with the CPU processor. The remote display system is a human-computer interaction display 10 connected to the CPU processor.
The CPU processor is ATmega16, and the power supply of the CPU processor is 5V.
As shown in fig. 2 and 3, the state self-checking circuit for magnetoelectric sensor of the present invention includes a signal generating circuit, a signal amplifier circuit, a voltage follower circuit, a signal conversion module circuit, a CPU processor and a warning module; the signal amplifier circuit comprises a first amplifier circuit and a second amplifier circuit, and the first amplifier circuit and the second amplifier circuit have the same structure and respectively and independently work; the voltage follower circuit comprises a first voltage follower circuit and a second voltage follower circuit, and the first voltage follower circuit and the second voltage follower circuit have the same structure and respectively and independently work; the two ends of a coil of the magnetoelectric sensor to be detected are respectively connected with a first amplifying electrical circuit and a second amplifier circuit, an output branch of the first amplifier circuit is connected with a first voltage follower circuit, and an output branch of the second amplifier circuit is connected with a signal conversion module circuit or the second amplifier circuit is connected with the second voltage follower circuit and then connected with the signal conversion module circuit; the output branch of the first voltage follower circuit, the output branch of the second amplifier circuit and the output branch of the second voltage follower circuit are respectively connected with different input ports of the signal conversion module circuit; the signal conversion module circuit is connected with an input port of the CPU processor, the CPU processor processes, analyzes and processes signals of the signal conversion module circuit, compares and analyzes the signals, and determines whether to send a control signal to the warning module or not according to an analysis result.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the technical principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.
Claims (9)
1. A state self-checking system of a magnetoelectric sensor is characterized by comprising the magnetoelectric sensor to be detected, a first operational amplifier, a second operational amplifier, a signal conversion module part, a signal processing module part and a warning module part; the two ends of the coil of the magnetoelectric sensor to be detected are equally divided and are respectively connected with the input end of the first operational amplifier and the input end of the second operational amplifier, the output end of the first operational amplifier and the output end of the second operational amplifier are respectively connected with the input end of the signal conversion module part, the output end of the signal conversion module part is connected with the input end of the signal processing module part, and the output end of the signal processing module part is connected with the input end of the warning module part.
2. The system according to claim 1, wherein said signal conversion module is a chip having a plurality of input ports.
3. The magnetoelectric sensor state self-checking system according to claim 2, wherein a first voltage follower is connected between the output terminal of the first operational amplifier and the input terminal of the signal conversion module portion.
4. The system according to claim 3, wherein said second operational amplifier further comprises a second output terminal, and a second voltage follower is connected between said second output terminal and said input terminal of said signal conversion module.
5. The magnetoelectric sensor state self-checking system according to any one of claims 1 to 4, wherein the signal processing module is a CPU processor, and the CPU is connected with a power supply; the warning module part comprises an acousto-optic warning lamp arranged on an instrument connected with the magnetoelectric sensor to be detected.
6. The system according to claim 5, wherein said alarm module further comprises a remote display device connected to said CPU.
7. The system according to claim 6, wherein said remote display system is a human-computer interactive true color touch liquid crystal display connected to said CPU processor.
8. The magnetoelectric sensor state self-checking system according to claim 7, wherein the CPU processor is of the type ATmega16, and the power supply of the CPU processor is a 5V power supply.
9. A circuit of a state self-checking system of a magnetoelectric sensor according to claim 4, characterized by comprising a signal generating circuit, a signal amplifier circuit, a voltage follower circuit, a signal conversion module circuit, a CPU processor and an alarm module; the signal amplifier circuit comprises a first amplifier circuit and a second amplifier circuit, and the first amplifier circuit and the second amplifier circuit have the same structure and respectively and independently work; the voltage follower circuit comprises a first voltage follower circuit and a second voltage follower circuit, and the first voltage follower circuit and the second voltage follower circuit have the same structure and respectively and independently work; the two ends of a coil of the magnetoelectric sensor to be detected are respectively connected with a first amplifying electrical circuit and a second amplifier circuit, an output branch of the first amplifier circuit is connected with a first voltage follower circuit, and an output branch of the second amplifier circuit is connected with a signal conversion module circuit or the second amplifier circuit is connected with the second voltage follower circuit and then connected with the signal conversion module circuit; the output branch of the first voltage follower circuit, the output branch of the second amplifier circuit and the output branch of the second voltage follower circuit are respectively connected with different input ports of the signal conversion module circuit; the signal conversion module circuit is connected with an input port of the CPU processor, the CPU processor processes, analyzes and processes signals of the signal conversion module circuit, compares and analyzes the signals, and determines whether to send a control signal to the warning module or not according to an analysis result.
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| CN201920550379.1U CN210071867U (en) | 2019-04-22 | 2019-04-22 | Magneto-electric sensor state self-checking system and circuit |
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| CN201920550379.1U CN210071867U (en) | 2019-04-22 | 2019-04-22 | Magneto-electric sensor state self-checking system and circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112881961A (en) * | 2021-01-27 | 2021-06-01 | 江西晶润光学有限公司 | Detection device and method for magnetic sensor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112881961A (en) * | 2021-01-27 | 2021-06-01 | 江西晶润光学有限公司 | Detection device and method for magnetic sensor |
| CN112881961B (en) * | 2021-01-27 | 2024-04-09 | 广州得尔塔影像技术有限公司 | Detection device and method of magnetic sensor |
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