CN113739825A - Sensor with fault self-checking function - Google Patents
Sensor with fault self-checking function Download PDFInfo
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- CN113739825A CN113739825A CN202111036281.2A CN202111036281A CN113739825A CN 113739825 A CN113739825 A CN 113739825A CN 202111036281 A CN202111036281 A CN 202111036281A CN 113739825 A CN113739825 A CN 113739825A
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- 230000008054 signal transmission Effects 0.000 claims abstract description 36
- 238000001514 detection method Methods 0.000 claims abstract description 16
- 238000000034 method Methods 0.000 claims description 6
- 238000003745 diagnosis Methods 0.000 claims description 4
- 238000010998 test method Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
- G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
- G01D5/16—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying resistance
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D18/00—Testing or calibrating apparatus or arrangements provided for in groups G01D1/00 - G01D15/00
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
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Abstract
The invention discloses a sensor with a fault self-checking function, which relates to the technical field of sensors and comprises a plurality of sensing elements and a self-checking module, wherein each sensing element is provided with a corresponding signal transmission path, and the self-checking module comprises a comparator and an adder; the self-checking module acquires an output signal of each signal transmission path; the comparator compares the output signals, and if the difference of the two output signals exceeds a detection threshold value, the comparator outputs a fault interrupt signal; otherwise, the adder superposes the output signals to obtain the output data of the sensor. The invention divides the signal path of the sensor into multiple paths by arranging a plurality of sensing elements, converts single-point faults into multi-point faults, adds a comparison and summation mechanism at the end of a data path, detects the faults by comparing the output data of different signal paths by using a comparator, and reconstructs the dynamic range and the signal-to-noise ratio of the sensor by overlapping the output data of different signal paths by using an adder.
Description
Technical Field
The invention relates to the technical field of sensors, in particular to a sensor with a fault self-checking function.
Background
With the development and popularization of networking technologies, sensors for data acquisition have grown exponentially. In order to ensure the accuracy of information acquisition, the sensors need to be monitored in real time to ensure the accuracy of data acquired by the sensors and increase the reliability of the system. Additional detection units are typically used to detect the sensors, but this increases system complexity and system construction costs.
Disclosure of Invention
The invention provides a sensor with a fault self-checking function aiming at the problems and the technical requirements, and the technical scheme of the invention is as follows:
a sensor with a fault self-checking function comprises a plurality of sensing elements and a self-checking module, wherein each sensing element is provided with a corresponding signal transmission path, and the self-checking module comprises a comparator and an adder; the self-checking method of the sensor comprises the following steps:
the self-checking module acquires an output signal of each signal transmission path;
the comparator compares the output signals, and if the difference of the two output signals exceeds a detection threshold value, the comparator outputs a fault interrupt signal; otherwise, the adder adds the amplitude of each output signal to obtain the output data of the sensor.
Further, the sensor further includes a plurality of analog-to-digital converters and a signal processor, and the self-checking module acquires an output signal of each signal transmission path, including:
each analog-to-digital converter is respectively connected with each corresponding sensing element, converts the output signal of each sensing element into a digital signal and inputs the digital signal into a signal processor;
and obtaining an output signal corresponding to each digital signal through the signal processor and transmitting the output signal to the self-checking module.
Further, the signal processor sequentially obtains output signals corresponding to each digital signal by adopting time division multiplexing and respectively transmits the output signals to the self-checking module.
Furthermore, the sensor comprises a plurality of signal processors which are respectively connected with a plurality of analog-to-digital converters and correspond to the analog-to-digital converters, and each signal processor obtains an output signal corresponding to each digital signal and respectively transmits the output signals to the self-checking module.
Further, if the signal transmission path is greater than two paths, the self-checking method of the sensor further includes:
the comparator compares the output signals, and if the difference between the output signal of only one signal transmission path and the output signals of other signal transmission paths exceeds a detection threshold value and the difference between any two output signals in the output signals of other signal transmission paths does not exceed the detection threshold value, the self-detection module averages the amplitudes of the output signals of other signal transmission paths to obtain an average output signal; the adder adds the amplitudes of the output signals of the other signal transmission paths and the average output signal to obtain output data of the sensor.
Further, the sensing element includes a photoelectric sensing element or a resistive sensing element.
Further, the sensor is connected with the microcontroller, and the microcontroller receives the fault interrupt signal output by the comparator and carries out fault diagnosis.
The beneficial technical effects of the invention are as follows:
the application discloses sensor with trouble self-checking function divides into the multichannel through setting up a plurality of sensing element with the signal route of sensor to single-point fault turns into multiple spot trouble to at the end of data path newly-increased comparison and summation mechanism, utilize the comparator to compare the output data of different signal routes and detect the trouble, utilize the output data of adder stack different signal routes to rebuild the dynamic range and the SNR of sensor. This application has greatly promoted the reliability of sensor through increasing the self-checking mechanism.
Drawings
Fig. 1 is a schematic structural diagram of a sensor having a self-checking function for faults according to an embodiment of the present application.
Fig. 2 is a schematic structural diagram of a sensor having a self-checking function for faults according to a second embodiment of the present application.
Fig. 3 is a schematic structural diagram of a sensor having a self-checking function for faults in the third embodiment of the present application.
Detailed Description
The following further describes the embodiments of the present invention with reference to the drawings.
The application discloses a sensor with a fault self-checking function, which comprises a plurality of sensing elements, a conventional analog circuit and a conventional digital circuit, wherein each sensing element is provided with a corresponding signal transmission path, and the analog circuit comprises an analog-to-digital converter which is connected with the sensing elements correspondingly; the digital circuit can comprise a single signal processor which adopts time division multiplexing to sequentially obtain output signals of a plurality of analog-to-digital converters; or the digital circuit can also comprise a signal processor self-checking module which is respectively connected with a plurality of analog-to-digital converters and corresponds to the analog-to-digital converters. Besides, the analog circuit also comprises commonly used modules, such as a linear voltage regulator, a reference voltage and the like; also included in the digital circuit are commonly available modules such as interface circuits, registers, clock/power management modules, etc.
Besides the conventional analog circuit and digital circuit, the sensor of the application is additionally provided with a self-checking module, wherein the self-checking module comprises a comparator and an adder, the comparator is used for comparing signals output by the sensing elements through the analog circuit and the digital circuit, and the adder is used for superposing the signals output by the sensing elements through the analog circuit and the digital circuit.
The self-checking method of the sensor comprises the following steps:
each analog-to-digital converter is respectively connected with each corresponding sensing element, converts the output signal of each sensing element into a digital signal and inputs the digital signal into a signal processor;
obtaining an output signal corresponding to each digital signal through a signal processor and transmitting the output signal to a self-checking module;
the comparator compares the output signals, and if the difference of the two output signals exceeds a detection threshold value, the comparator outputs a fault interrupt signal; otherwise, the adder adds the amplitude of each output signal to obtain the output data of the sensor.
Optionally, the signal processor sequentially obtains output signals corresponding to each digital signal by using time division multiplexing and respectively transmits the output signals to the self-checking module.
Optionally, the sensor includes a plurality of signal processors respectively connected to the plurality of analog-to-digital converters, and each signal processor obtains an output signal corresponding to each digital signal and respectively transmits the output signal to the self-checking module.
Optionally, if the signal transmission path is greater than two paths, the self-checking method of the sensor further includes:
the comparator compares the output signals, and if the difference between the output signal of only one signal transmission path and the output signals of other signal transmission paths exceeds a detection threshold value and the difference between any two output signals in the output signals of other signal transmission paths does not exceed the detection threshold value, the self-detection module averages the amplitudes of the output signals of other signal transmission paths to obtain an average output signal; the adder adds the amplitudes of the output signals of the other signal transmission paths and the average output signal to obtain output data of the sensor.
Optionally, the sensing element includes a photoelectric sensing element or a resistive sensing element.
Optionally, the sensor is connected to a microcontroller, and the microcontroller receives the fault interrupt signal output by the comparator and performs fault diagnosis.
Example one
Referring to fig. 1, the sensor includes 2 sensing elements, and a conventional analog circuit and a conventional digital circuit, where the sensing elements include a photoelectric sensing element or a resistive sensing element. Each sensing element is provided with a corresponding signal transmission path, and the analog circuit comprises 2 analog-to-digital converters which are respectively connected with the 2 sensing elements; the digital circuit comprises 1 signal processor which adopts time division multiplexing to obtain output signals of 2 analog-to-digital converters in turn; besides, the analog circuit also comprises commonly used modules, such as a linear voltage regulator, a reference voltage and the like; also included in the digital circuit are commonly available modules such as interface circuits, registers, clock/power management modules, etc.
In addition to the conventional analog circuit and digital circuit, a self-test module is added to the sensor, and the self-test module includes a comparator for comparing signals output by the sensing elements through the analog circuit and the digital circuit, and an adder for adding amplitudes of the signals output by the sensing elements through the analog circuit and the digital circuit.
The self-checking method of the sensor in the embodiment comprises the following steps:
the two analog-to-digital converters are respectively connected with the two corresponding sensing elements, convert the output signal of each sensing element into a digital signal and input the digital signal into the signal processor;
the signal processor sequentially obtains output signals corresponding to the two digital signals by adopting time division multiplexing and respectively transmits the output signals to the self-checking module;
the comparator compares the two output signals, and if the difference of the two output signals exceeds a detection threshold, the comparator outputs a fault interrupt signal; otherwise, the adder adds the amplitudes of the two output signals to obtain the output data of the sensor.
Preferably, the sensor is further connected with a microcontroller, and the microcontroller is used for receiving the fault interrupt signal output by the comparator and carrying out fault diagnosis on the sensor.
Example two
Referring to fig. 2, a sensing element, an analog circuit, and a self-checking module of the sensor are the same as those of the embodiment, and the working principle is the same, which is not described herein again. The difference between this embodiment and the first embodiment is the specific structure of the signal processor in the digital circuit.
The digital circuit of this embodiment includes 2 signal processors respectively connected to the 2 analog-to-digital converters, and each signal processor obtains an output signal corresponding to each digital signal and transmits the output signal to the self-checking module.
EXAMPLE III
Referring to fig. 3, the sensor includes a plurality of sensing elements, and a conventional analog circuit and a conventional digital circuit, wherein the sensing elements include a photoelectric sensing element or a resistive sensing element. Each sensing element has a corresponding signal transmission path, and in this embodiment, 3 sensing elements are illustrated, and optionally, the number of the sensing elements may be set to be more according to actual needs. The analog circuit comprises 3 analog-to-digital converters respectively connected with the 3 sensing elements; the digital circuit structure of the present embodiment is the same as that of the first embodiment, and includes 1 signal processor, which sequentially obtains output signals of 3 analog-to-digital converters by time division multiplexing; optionally, the structure of the digital circuit may also be the same as that of the second embodiment, that is, the digital circuit includes 3 signal processors respectively connected to the 3 analog-to-digital converters, and each signal processor obtains an output signal corresponding to each digital signal and respectively transmits the output signal to the self-test module. Besides, the analog circuit also comprises commonly used modules, such as a linear voltage regulator, a reference voltage and the like; also included in the digital circuit are commonly available modules such as interface circuits, registers, clock/power management modules, etc.
The present embodiment is different from the first embodiment and the second embodiment in that the number of signal transmission paths of the sensing element in the sensor is greater than 2, and therefore the self-test method of the sensor further includes:
the comparator compares the output signals of each signal transmission path, if the difference between the output signal of only one signal transmission path and at least one output signal of other signal transmission paths exceeds the detection threshold value and the difference between any two output signals of the output signals of other signal transmission paths does not exceed the detection threshold value, the self-checking module averages the amplitudes of the output signals of other signal transmission paths to obtain an average output signal, and the adder performs amplitude addition on the output signals of other signal transmission paths and the average output signal to obtain the output data of the sensor.
What has been described above is only a preferred embodiment of the present application, and the present invention is not limited to the above embodiment. It is to be understood that other modifications and variations directly derivable or suggested by those skilled in the art without departing from the spirit and concept of the present invention are to be considered as included within the scope of the present invention.
Claims (7)
1. A sensor with a fault self-checking function is characterized in that the sensor comprises a plurality of sensing elements and a self-checking module, each sensing element is provided with a corresponding signal transmission path, and the self-checking module comprises a comparator and an adder; the self-checking method of the sensor comprises the following steps:
the self-checking module acquires an output signal of each signal transmission path;
the comparator compares the output signals, and if the difference of the two output signals exceeds a detection threshold value, the comparator outputs a fault interrupt signal; otherwise, the adder adds the amplitude of each output signal to obtain the output data of the sensor.
2. The sensor of claim 1, wherein the sensor further comprises a plurality of analog-to-digital converters and a signal processor, and the self-test module obtains the output signal of each of the signal transmission paths, comprising:
each analog-to-digital converter is respectively connected with each corresponding sensing element, converts the output signal of each sensing element into a digital signal and inputs the digital signal into the signal processor;
and obtaining an output signal corresponding to each digital signal through the signal processor and transmitting the output signal to the self-checking module.
3. The sensor of claim 2, wherein the signal processor sequentially obtains the output signal corresponding to each of the digital signals by time division multiplexing and respectively transmits the output signals to the self-checking module.
4. The sensor according to claim 2, wherein the sensor comprises a plurality of signal processors respectively connected with the plurality of analog-to-digital converters, and each signal processor obtains an output signal corresponding to each digital signal and respectively transmits the output signal to the self-checking module.
5. The sensor according to any one of claims 1 to 4, wherein the signal transmission path is greater than two, and the self-test method of the sensor further comprises:
the comparator compares the output signals, and if the difference between the output signal of only one signal transmission path and the output signals of other signal transmission paths exceeds a detection threshold and the difference between any two output signals in the output signals of other signal transmission paths does not exceed the detection threshold, the self-checking module averages the amplitudes of the output signals of other signal transmission paths to obtain an average output signal; the adder performs amplitude addition on the output signals of the other signal transmission paths and the average output signal to obtain output data of the sensor.
6. The sensor of claim 1, wherein the sensing element comprises a photoelectric sensing element or a resistive sensing element.
7. The sensor of claim 1, wherein the sensor is connected to a microcontroller, and the microcontroller receives the fault interrupt signal output by the comparator and performs fault diagnosis.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111036281.2A CN113739825A (en) | 2021-09-06 | 2021-09-06 | Sensor with fault self-checking function |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111036281.2A CN113739825A (en) | 2021-09-06 | 2021-09-06 | Sensor with fault self-checking function |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114323012A (en) * | 2022-01-11 | 2022-04-12 | 广州导远电子科技有限公司 | Data processing method of double-MEMS (micro-electromechanical systems) inertia measurement unit and double-MEMS inertia measurement device |
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| CN1267401A (en) * | 1997-06-17 | 2000-09-20 | 瓦尔特·本德工程师股份有限两合公司 | Method and device for monitoring insulation and fault current in electric AC network |
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| CN110514259A (en) * | 2019-10-14 | 2019-11-29 | 沃森测控技术（河北）有限公司 | A kind of detection method of high-precision coriolis meter |
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2021
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| JPS63117607A (en) * | 1986-10-27 | 1988-05-21 | テイツセン・インドウストリ−・アクチエン ゲゼルシヤフト | Method and apparatus for measuring space between conductive repulsion track and magnetic sensing device |
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