CN112462230B - Fault detection method, device and equipment for signal channel - Google Patents
Fault detection method, device and equipment for signal channel Download PDFInfo
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Abstract
The application discloses a fault detection method of a signal channel, which considers that two sub-signals in a differential signal have the same frequency under normal conditions, so that the frequency of the two sub-signals in the differential signal received by a detection circuit can be obtained, and the fault of the signal channel can be prompted by a prompter under the condition that the frequencies of the two sub-signals are different, so that a worker can conveniently know the condition (the reliability of a rotating speed result is insufficient) in time and can respond in time, and potential safety hazards are eliminated. The application also discloses a fault detection device and equipment of the signal channel, and the fault detection device and equipment have the same beneficial effects as the fault detection method of the signal channel.
Description
Technical Field
The invention relates to the field of rotation speed sensors, in particular to a fault detection method of a signal channel, and also relates to a fault detection device and equipment of the signal channel.
Background
The electromagnetic type rotating speed sensor is widely applied to various fields, rotating machines such as gears and the like can be subjected to rotating speed detection through the electromagnetic type rotating speed sensor, a group of differential signals can be generated when the electromagnetic type rotating speed sensor works, the rear end detection circuit can carry out rotating speed detection according to the received differential signals, however, two sub signals in the differential signals can not be normally transmitted to the detection circuit due to faults in transmission paths, whether the differential signals can be smoothly transmitted to the detection circuit can not be detected in the prior art, and if a certain signal channel in the differential signals fails, the reliability of a rotating speed result output by the detection circuit is insufficient, and great potential safety hazards exist in relevant control through the detection circuit.
Therefore, how to provide a solution to the above technical problem is a problem that a person skilled in the art needs to solve at present.
Disclosure of Invention
The invention aims to provide a fault detection method of a signal channel, which can detect and prompt the fault of the signal channel, so that potential safety hazards can be eliminated in time; the invention further aims to provide a fault detection device and equipment for the signal channel, which can detect and prompt the fault of the signal channel, and is convenient for eliminating potential safety hazards in time.
In order to solve the above technical problems, the present invention provides a fault detection method for a signal channel, which is applied to a processor, and includes:
respectively acquiring the frequencies of two sub-signals in the differential signal received by the detection circuit;
judging whether the frequencies of the two paths of sub-signals are the same or not;
If not, the control prompter prompts the signal channel to be faulty.
Preferably, the frequencies of the two sub-signals in the differential signal received by the respective acquisition detection circuit are specifically:
Respectively acquiring the frequencies of two sub-signals in the differential signal received by the detection circuit through hysteresis comparators respectively connected with two signal receiving ends of the detection circuit for receiving the differential signal;
the judging whether the frequencies of the two paths of the sub-signals are the same specifically comprises:
And judging whether signals sent by the two hysteresis comparators have signal frequencies at the same time when the gear to be tested rotates.
Preferably, the hysteresis comparator comprises a reference voltage source, a first resistor, a second resistor, a third resistor, a diode and a comparator;
the reference voltage source is connected with the first end of the first resistor, the second end of the first resistor is connected with the first end of the second resistor and the non-inverting input end of the comparator respectively, the second end of the second resistor is connected with the output end of the comparator and the processor respectively, the inverting input end of the comparator is connected with the first end of the third resistor, the second end of the third resistor is connected with the negative electrode of the diode and the signal receiving end of one path of sub-signals respectively, and the positive electrode of the diode is grounded.
Preferably, the fault detection method of the signal channel further includes:
When the hysteresis comparator connected with the first sub-signal receiving end outputs a low level and the other hysteresis comparator outputs a high level, controlling the prompter to prompt that a sensor is not connected, and when the hysteresis comparator connected with the first sub-signal receiving end outputs a high level and the other hysteresis comparator outputs a low level, controlling the prompter to prompt that the sensor is connected;
the electromagnetic type rotating speed sensor corresponding to the differential signal is a reluctance type rotating speed sensor, and the reluctance type rotating speed sensor is also connected with the voltage dividing circuit;
The voltage dividing circuit comprises a voltage dividing voltage source, a first voltage dividing resistor, a second voltage dividing resistor and a third voltage dividing resistor;
The voltage dividing voltage source is connected with the first end of the first voltage dividing resistor, the second end of the first voltage dividing resistor is connected with the first sub-signal receiving end of the detection circuit and the first end of the second voltage dividing resistor respectively, the second end of the second voltage dividing resistor is connected with the first end of the third voltage dividing resistor and the second sub-signal receiving end of the detection circuit respectively, and the second end of the third voltage dividing resistor is grounded.
Preferably, the fault detection method of the signal channel further includes:
And when the two hysteresis comparators output high level at the same time, controlling the prompter to prompt the voltage dividing circuit to break.
Preferably, the processor is a field programmable gate array FPGA.
Preferably, the prompter is a network terminal.
Preferably, after determining whether frequencies of the two paths of the sub-signals are the same, the fault detection method of the signal channel further includes:
if not, the alarm is controlled to give an alarm.
In order to solve the technical problem, the present invention further provides a fault detection device for a signal channel, which is applied to a processor and includes:
The acquisition module is used for respectively acquiring the frequencies of two sub-signals in the differential signal received by the detection circuit;
The judging module is used for judging whether the frequencies of the two paths of sub-signals are the same, and if not, the control module is triggered;
The control module is used for controlling the prompter to prompt the signal channel to be faulty.
In order to solve the above technical problem, the present invention further provides a fault detection device for a signal channel, including:
A memory for storing a computer program;
A processor for implementing the steps of the fault detection method of the signal path as described above when executing the computer program.
The application provides a fault detection method of a signal channel, which considers that two sub-signals in a differential signal have the same frequency under normal conditions, so that the frequency of the two sub-signals in the differential signal received by a detection circuit can be obtained, and the fault of the signal channel can be prompted by a prompter under the condition that the frequencies of the two sub-signals are different, so that a worker can conveniently know the condition in time (the reliability of a rotating speed result is insufficient) and respond in time, and potential safety hazards are eliminated.
The invention also provides a fault detection device and equipment of the signal channel, and the fault detection device and equipment have the same beneficial effects as the fault detection method of the signal channel.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required in the prior art and the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic flow chart of a fault detection method of a signal channel provided by the invention;
fig. 2 is a schematic structural diagram of a fault detection device for a signal channel according to the present invention;
Fig. 3 is a schematic structural diagram of a fault detection device for a signal channel according to the present invention;
fig. 4 is a schematic structural diagram of another fault detection device for signal channels according to the present invention.
Detailed Description
The core of the invention is to provide a fault detection method of the signal channel, which can detect and prompt the fault of the signal channel, thereby being convenient for eliminating potential safety hazards in time; the invention further provides a fault detection device and equipment for the signal channel, which can detect and prompt the fault of the signal channel, and is convenient for eliminating potential safety hazards in time.
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1, fig. 1 is a flow chart of a fault detection method of a signal channel provided by the present invention, where the fault detection method of the signal channel is applied to a processor, and includes:
step S1: respectively acquiring the frequencies of two sub-signals in the differential signal received by the detection circuit;
Specifically, considering the technical problem in the background technology, the electromagnetic type rotation speed sensor adopts the electromagnetic induction principle to realize speed measurement, the front end of the electromagnetic type rotation speed sensor is wound with a coil, when the equipment to be detected rotates, the magnetic force line through the sensor coil changes, periodic voltage is generated in the sensor coil and is output in the form of differential signals, the rotation speed of the equipment to be detected can be measured through processing and measuring the differential signals, and considering that two sub-signals in the differential signals have the same frequency under normal conditions, the frequency of the two sub-signals in the differential signals received by the detection circuit can be used for carrying out fault diagnosis on a signal channel of the differential signals, so that the frequency of the two sub-signals in the differential signals received by the detection circuit can be firstly obtained in the embodiment of the application, and the frequency can be used as a data base in the subsequent step for carrying out fault detection on the signal channel.
Step S2: judging whether the frequencies of the two sub-signals are the same;
Specifically, considering that the frequencies of two sub-signals in the differential signal received by the detection circuit should be the same under normal conditions, once the two different conditions occur, it is proved that a fault exists in a signal channel of at least one of the two sub-signals, so in the embodiment of the invention, whether the frequencies of the two sub-signals are the same can be judged, and then the subsequent steps are triggered according to the judgment result, so that the fault detection of the signal channel is performed.
In consideration of the fact that there may be a slight difference in the frequencies of the two sub-signals under normal conditions, a certain error range may be set when judging whether the frequencies of the two sub-signals are identical, and when the difference between the two frequencies is within the error range, the two sub-signals are recognized to be identical.
Step S3: if not, the control prompter prompts the signal channel to be faulty.
Specifically, under the condition that the frequencies of the two sub-signals are different, the signal channel of at least one of the sub-signals is proved to have faults, the rotating speed result output by the detection circuit is unreliable under the condition, and if the rotating speed result is continuously adopted for relevant regulation and control, a safety accident can possibly be generated, so that in the embodiment of the invention, in order to facilitate a worker to quickly know the situation, the prompter can be controlled to prompt the fault of the signal channel, the worker can conveniently take countermeasures in time, the fault is repaired, and the potential safety hazard is eliminated.
If the frequencies of the two sub-signals are the same, it is proved that the signal channels have no faults, so that the probability that the two signal channels have faults at the same time and the two frequencies are kept the same is very small and can be almost ignored.
The application provides a fault detection method of a signal channel, which considers that two sub-signals in a differential signal have the same frequency under normal conditions, so that the frequency of the two sub-signals in the differential signal received by a detection circuit can be obtained, and the fault of the signal channel can be prompted by a prompter under the condition that the frequencies of the two sub-signals are different, so that a worker can conveniently know the condition in time (the reliability of a rotating speed result is insufficient) and respond in time, and potential safety hazards are eliminated.
For better explaining the embodiments of the present invention, please refer to fig. 2, fig. 2 is a schematic structural diagram of a fault detection device for a signal channel according to the present invention, where the fault detection device is based on the above embodiments:
As a preferred embodiment, the frequencies of the two sub-signals in the differential signal received by the detection circuit are specifically:
Respectively acquiring the frequencies of two sub-signals in the differential signal received by the detection circuit through hysteresis comparators respectively connected with two signal receiving ends of the detection circuit for receiving the differential signal;
Judging whether the frequencies of the two sub-signals are the same or not specifically comprises the following steps:
And judging whether signals sent by the two hysteresis comparators have signal frequencies at the same time when the gear to be tested rotates.
Specifically, in fig. 2, the first comparator U1 and its peripheral circuit, the second comparator U4 and its peripheral circuit are the two hysteresis comparators mentioned above, and the signal path may include a transmission line of a sub-signal and each device in the line, and its specific form may be various types, which is not limited herein.
In particular, the hysteresis comparator has the advantages of simple structure, low cost, long service life and the like.
Considering that the signal channel of the sub-signal is broken or the devices in the signal channel are damaged, the signal channel cannot transmit the sub-signal, so that the corresponding hysteresis comparator of the signal channel cannot output a frequency signal (the sub-signal has frequency when normally transmitted to the hysteresis comparator, and the hysteresis comparator also outputs a signal with corresponding frequency in the form of high-low level interval).
Of course, besides the hysteresis comparator, the frequencies of the two sub-signals in the differential signal received by the detection circuit may also be obtained in other manners, and the embodiment of the present invention is not limited herein.
As a preferred embodiment, the hysteresis comparator comprises a reference voltage source, a first resistor, a second resistor, a third resistor, a diode and a comparator;
The reference voltage source is connected with the first end of the first resistor, the second end of the first resistor is connected with the first end of the second resistor and the non-inverting input end of the comparator respectively, the second end of the second resistor is connected with the output end of the comparator and the processor respectively, the inverting input end of the comparator is connected with the first end of the third resistor, the second end of the third resistor is connected with the cathode of the diode and the signal receiving end of one of the sub signals respectively, and the anode of the diode is grounded.
Specifically, the hysteresis comparator provided by the embodiment of the invention has the advantages of simple structure, low cost and strong reliability.
Of course, besides the specific structure provided in the embodiment of the present invention, the hysteresis comparator may be of various other types, and the embodiment of the present invention is not limited herein.
As a preferred embodiment, the fault detection method of the signal channel further includes:
When the hysteresis comparator connected with the first sub-signal receiving end outputs a low level and the other hysteresis comparator outputs a high level, the control prompter prompts that the sensor is not connected, and when the hysteresis comparator connected with the first sub-signal receiving end outputs a high level and the other hysteresis comparator outputs a low level, the control prompter prompts that the sensor is connected;
the electromagnetic type rotating speed sensor corresponding to the differential signal is a reluctance type rotating speed sensor, and the reluctance type rotating speed sensor is also connected with the voltage dividing circuit;
The voltage dividing circuit comprises a voltage dividing voltage source, a first voltage dividing resistor R1, a second voltage dividing resistor R2 and a third voltage dividing resistor R3;
The voltage dividing voltage source is connected with the first end of the first voltage dividing resistor R1, the second end of the first voltage dividing resistor R1 is respectively connected with the first sub-signal receiving end of the detection circuit and the first end of the second voltage dividing resistor R2, the second end of the second voltage dividing resistor R2 is respectively connected with the first end of the third voltage dividing resistor R3 and the second sub-signal receiving end of the detection circuit, and the second end of the third voltage dividing resistor R3 is grounded.
Specifically, after the voltage dividing circuit is connected, the two paths of differential signals are equivalent to being connected in parallel with the second voltage dividing resistor R2 in the voltage dividing circuit, when the wiring of the sensor is not connected (equivalent to the electromagnetic rotation speed sensor is not connected to the second voltage dividing resistor R2), according to the proportion of three voltage dividing resistors, the voltage value between the first voltage dividing resistor R1 and the second voltage dividing resistor R2 is higher than the reference voltage of the non-inverting input end of the first comparator U1 connected with the sensor, at the moment, the first comparator U1 connected with the middle point of the first voltage dividing resistor R1 and the second voltage dividing resistor R2 outputs a low level, and at the moment, the voltage value between the second voltage dividing resistor R2 and the third voltage dividing resistor R3 is lower than the reference voltage of the non-inverting input end of the second comparator U4 connected with the sensor, so that the second comparator U4 outputs a high level; after the connection of the sensor (corresponding to the electromagnetic rotation speed sensor and connected to the second voltage dividing resistor R2), since the internal resistance of the magnetoresistive sensor is small (usually lower than 500 Ω), the resistance of the second voltage dividing resistor R2 is reduced, the resistance between the first voltage dividing resistor R1 and the second voltage dividing resistor R2 is reduced, and the resistance between the second voltage dividing resistor R2 and the third voltage dividing resistor R3 is increased, so that the first comparator U1 outputs a high level and the second comparator U4 outputs a low level, and the processor can determine that the sensor is connected and prompts through the prompt device in this case.
It should be noted that, under the condition that the rotation speed of the device to be tested is low, even though the sensor is already connected in parallel to two ends of the second voltage dividing resistor R2, the comparator may still output a fixed level because the amplitude of the differential signal generated by the sensor is small and the comparator does not output a signal with a frequency because of the change of the level of the differential signal, such as the "the hysteresis comparator connected to the receiving end of the first sub-signal outputs a high level and the other hysteresis comparator outputs a low level", only when the rotation speed of the device to be tested is high and the amplitude of the differential signal can affect the comparator, the comparator will respond to the differential signal received by the inverting input end to output a signal with a frequency because of the change of the level of the differential signal (i.e. a square wave signal).
As a preferred embodiment, the fault detection method of the signal channel further includes:
When the two hysteresis comparators output high level at the same time, the control prompter prompts the voltage dividing circuit to be opened.
Specifically, considering that the voltage dividing circuit has the possibility of short circuit fault, in order to facilitate the staff to find the short circuit fault of the voltage dividing circuit in time, the embodiment of the invention considers that the voltage values received by the inverting input ends of the two hysteresis comparators are 0V when the voltage dividing circuit is disconnected, and the two hysteresis comparators output high level at the moment, so that the embodiment of the invention can control the prompter to prompt the voltage dividing circuit to be disconnected under the condition, thereby facilitating the staff to quickly know the condition and carry out targeted overhaul and improving the working efficiency.
As a preferred embodiment, the processor is an FPGA (Field Programmable GATE ARRAY ).
Specifically, the FPGA has the advantages of small volume, low cost, long service life and the like.
Of course, the processor may be of various types other than PFGA, and embodiments of the present invention are not limited in this respect.
As a preferred embodiment, the prompter is a network terminal.
Specifically, the network terminal can facilitate the remote information receiving of the staff, and can improve the working efficiency.
The network terminal may be of various types, for example, may be a mobile phone, etc., and the embodiment of the present invention is not limited herein.
Of course, the prompter may be a local prompter besides the network terminal, for example, a light emitting diode LED, etc., which is not limited herein.
As a preferred embodiment, after determining whether frequencies of the two sub-signals are the same, the fault detection method of the signal path further includes:
if not, the alarm is controlled to give an alarm.
Specifically, considering that a worker cannot find a fault condition in time under the prompt of the prompter, the prompting effect can be enhanced through the alarm in the embodiment of the invention, so that the worker can find the fault of the signal channel through the alarm in the first time, and the working efficiency is improved.
The alarm may be of various types, for example, may be a buzzer, etc., and embodiments of the present invention are not limited herein.
Referring to fig. 3, fig. 3 is a schematic structural diagram of a fault detection device for a signal channel according to the present invention, where the fault detection device for a signal channel is applied to a processor, and includes:
the acquisition module 1 is used for respectively acquiring the frequencies of two sub-signals in the differential signal received by the detection circuit;
the judging module 2 is used for judging whether the frequencies of the two sub-signals are the same, and if not, triggering the control module;
and the control module 3 is used for controlling the prompter to prompt the signal channel to fail.
For the description of the fault detection device for a signal channel provided in the embodiment of the present invention, reference is made to the foregoing embodiment of the fault detection method for a signal channel, and the embodiment of the present invention is not repeated herein.
Referring to fig. 4, fig. 4 is a schematic structural diagram of another fault detection device for a signal channel according to the present invention, where the fault detection device for a signal channel includes:
a memory 4 for storing a computer program;
A processor 5 for implementing the steps of the fault detection method of the signal path in the previous embodiment when executing the computer program.
For the description of the fault detection device for a signal channel provided in the embodiment of the present invention, reference is made to the foregoing embodiment of the fault detection method for a signal channel, and the embodiment of the present invention is not repeated herein.
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant points refer to the description of the method section.
It should also be noted that in this specification, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (6)
1. A method for detecting a fault in a signal path, applied to a processor, comprising:
respectively acquiring the frequencies of two sub-signals in the differential signal received by the detection circuit;
judging whether the frequencies of the two paths of sub-signals are the same or not;
if not, the control prompter prompts the signal channel to fail;
the frequencies of the two sub-signals in the differential signal received by the detection circuit are specifically:
Respectively acquiring the frequencies of two sub-signals in the differential signal received by the detection circuit through hysteresis comparators respectively connected with two signal receiving ends of the detection circuit for receiving the differential signal;
the judging whether the frequencies of the two paths of the sub-signals are the same specifically comprises:
Judging whether signals sent by the two hysteresis comparators have signal frequencies at the same time when the gear to be tested rotates;
the hysteresis comparator comprises a reference voltage source, a first resistor, a second resistor, a third resistor, a diode and a comparator;
The reference voltage source is connected with the first end of the first resistor, the second end of the first resistor is respectively connected with the first end of the second resistor and the non-inverting input end of the comparator, the second end of the second resistor is respectively connected with the output end of the comparator and the processor, the inverting input end of the comparator is connected with the first end of the third resistor, the second end of the third resistor is respectively connected with the negative electrode of the diode and the signal receiving end of one path of sub-signals, and the positive electrode of the diode is grounded;
the fault detection method of the signal channel further comprises the following steps:
When the hysteresis comparator connected with the first sub-signal receiving end outputs a low level and the other hysteresis comparator outputs a high level, controlling the prompter to prompt that a sensor is not connected, and when the hysteresis comparator connected with the first sub-signal receiving end outputs a high level and the other hysteresis comparator outputs a low level, controlling the prompter to prompt that the sensor is connected;
the electromagnetic type rotating speed sensor corresponding to the differential signal is a reluctance type rotating speed sensor, and the reluctance type rotating speed sensor is also connected with the voltage dividing circuit;
The voltage dividing circuit comprises a voltage dividing voltage source, a first voltage dividing resistor, a second voltage dividing resistor and a third voltage dividing resistor;
the voltage dividing voltage source is connected with the first end of the first voltage dividing resistor, the second end of the first voltage dividing resistor is respectively connected with the first sub-signal receiving end of the detection circuit and the first end of the second voltage dividing resistor, the second end of the second voltage dividing resistor is respectively connected with the first end of the third voltage dividing resistor and the second sub-signal receiving end of the detection circuit, and the second end of the third voltage dividing resistor is grounded;
the fault detection method of the signal channel further comprises the following steps:
And when the two hysteresis comparators output high level at the same time, controlling the prompter to prompt the voltage dividing circuit to break.
2. The method of claim 1, wherein the processor is a field programmable gate array FPGA.
3. The method for detecting a failure of a signal path according to claim 1, wherein the prompter is a network terminal.
4. A signal path failure detection method according to any one of claims 1 to 3, wherein after said determining whether frequencies of two of said sub-signals are identical, the signal path failure detection method further comprises:
if not, the alarm is controlled to give an alarm.
5. A fault detection device for a signal path, for use with a processor, comprising:
The acquisition module is used for respectively acquiring the frequencies of two sub-signals in the differential signal received by the detection circuit;
The judging module is used for judging whether the frequencies of the two paths of sub-signals are the same, and if not, the control module is triggered;
The control module is used for controlling the prompter to prompt the signal channel to be faulty;
The acquisition module is specifically configured to: respectively acquiring the frequencies of two sub-signals in the differential signal received by the detection circuit through hysteresis comparators respectively connected with two signal receiving ends of the detection circuit for receiving the differential signal;
The judging module is specifically configured to:
Judging whether signals sent by the two hysteresis comparators have signal frequencies at the same time when the gear to be tested rotates;
the hysteresis comparator comprises a reference voltage source, a first resistor, a second resistor, a third resistor, a diode and a comparator;
The reference voltage source is connected with the first end of the first resistor, the second end of the first resistor is respectively connected with the first end of the second resistor and the non-inverting input end of the comparator, the second end of the second resistor is respectively connected with the output end of the comparator and the processor, the inverting input end of the comparator is connected with the first end of the third resistor, the second end of the third resistor is respectively connected with the negative electrode of the diode and the signal receiving end of one path of sub-signals, and the positive electrode of the diode is grounded;
Also used for: when the hysteresis comparator connected with the first sub-signal receiving end outputs a low level and the other hysteresis comparator outputs a high level, controlling the prompter to prompt that a sensor is not connected, and when the hysteresis comparator connected with the first sub-signal receiving end outputs a high level and the other hysteresis comparator outputs a low level, controlling the prompter to prompt that the sensor is connected;
the electromagnetic type rotating speed sensor corresponding to the differential signal is a reluctance type rotating speed sensor, and the reluctance type rotating speed sensor is also connected with the voltage dividing circuit;
The voltage dividing circuit comprises a voltage dividing voltage source, a first voltage dividing resistor, a second voltage dividing resistor and a third voltage dividing resistor;
the voltage dividing voltage source is connected with the first end of the first voltage dividing resistor, the second end of the first voltage dividing resistor is respectively connected with the first sub-signal receiving end of the detection circuit and the first end of the second voltage dividing resistor, the second end of the second voltage dividing resistor is respectively connected with the first end of the third voltage dividing resistor and the second sub-signal receiving end of the detection circuit, and the second end of the third voltage dividing resistor is grounded;
also used for: and when the two hysteresis comparators output high level at the same time, controlling the prompter to prompt the voltage dividing circuit to break.
6. A fault detection device for a signal path, comprising:
A memory for storing a computer program;
a processor for implementing the steps of the fault detection method of a signal path according to any one of claims 1 to 4 when executing said computer program.
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| CN113055050B (en) * | 2021-03-25 | 2022-03-15 | 深圳市东昕科技有限公司 | Wired communication circuit and wired communication system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4764685A (en) * | 1985-12-05 | 1988-08-16 | Alfred Teves Gmbh | Method and circuit configuration for processing the output signals of a rotational speed sensor |
| EP1462769A2 (en) * | 2003-03-26 | 2004-09-29 | Hamilton Sundstrand Corporation | Sensor with fault detection |
| CN103823079A (en) * | 2014-03-07 | 2014-05-28 | 北京四方继保自动化股份有限公司 | Device and method for measuring magnetic resistance type speed sensor with online fault diagnosis |
| CN109720382A (en) * | 2019-01-07 | 2019-05-07 | 唐智科技湖南发展有限公司 | A kind of vehicle Rotating speed measring and power generator |
| CN111122908A (en) * | 2019-12-30 | 2020-05-08 | 中国科学院工程热物理研究所 | Circuit design device and method for self-detecting faults of aircraft engine speed sensor |
-
2020
- 2020-11-17 CN CN202011284694.8A patent/CN112462230B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4764685A (en) * | 1985-12-05 | 1988-08-16 | Alfred Teves Gmbh | Method and circuit configuration for processing the output signals of a rotational speed sensor |
| EP1462769A2 (en) * | 2003-03-26 | 2004-09-29 | Hamilton Sundstrand Corporation | Sensor with fault detection |
| CN103823079A (en) * | 2014-03-07 | 2014-05-28 | 北京四方继保自动化股份有限公司 | Device and method for measuring magnetic resistance type speed sensor with online fault diagnosis |
| CN109720382A (en) * | 2019-01-07 | 2019-05-07 | 唐智科技湖南发展有限公司 | A kind of vehicle Rotating speed measring and power generator |
| CN111122908A (en) * | 2019-12-30 | 2020-05-08 | 中国科学院工程热物理研究所 | Circuit design device and method for self-detecting faults of aircraft engine speed sensor |
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| CN112462230A (en) | 2021-03-09 |
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