CN117192146A - Method and device for detecting faults of rotating speed sensor - Google Patents
Method and device for detecting faults of rotating speed sensor Download PDFInfo
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- CN117192146A CN117192146A CN202310468373.0A CN202310468373A CN117192146A CN 117192146 A CN117192146 A CN 117192146A CN 202310468373 A CN202310468373 A CN 202310468373A CN 117192146 A CN117192146 A CN 117192146A
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- 238000001514 detection method Methods 0.000 claims description 22
- 230000015556 catabolic process Effects 0.000 claims description 3
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Abstract
The invention discloses a method and a device for detecting faults of a rotating speed sensor, comprising the following steps: s1, setting output measurement signals of a to-be-measured rotating speed sensor as periodic pulse square waves, and setting output signals of two fault judgment output channels of the to-be-measured rotating speed sensor to be opposite in phase; s2, judging the working state of the rotating speed sensor to be detected through judging the output signal state of the rotating speed sensor to be detected. By adopting the method and the device for detecting the faults of the rotating speed sensor, the invention can rapidly judge whether the rotating speed sensor has faults or not by correlating the state of the output signal with the working state of the rotating speed sensor, thereby ensuring the safe operation of a controlled system.
Description
Technical Field
The invention relates to the technical field of fault detection of a rotating speed sensor, in particular to a rotating speed sensor fault detection method and device.
Background
The rotation speed sensor is used for acquiring the rotation speed, the passing distance, the rotation direction, the change of the rotation acceleration and the like of the rotating object as the name implies. The method is widely used in the traffic field, measures information such as the movement speed, the direction and the acceleration of the vehicle, controls the vehicle according to the obtained information, such as a necessary train control system in rail traffic, and performs speed-distance safety protection on the train according to the information so as to ensure the running safety of the train. The core component is that a magneto resistor is used as a detection element, when the detected object is provided with a convex (or concave) magnetic or magnetic conductive material, the rotation speed sensor outputs a pulse signal related to the rotation frequency along with the rotation of the detected object, so that the purpose of speed measurement or displacement detection is achieved.
If the rotation speed sensor is in a motion state, the motion information of the rotation speed sensor cannot be acquired, the controlled system is out of control, and accidents are most likely to occur, so that the operation safety of the controlled system is directly affected by the operation of the rotation speed sensor. At present, only the wire breakage detection can be usually performed on the connection wire between the rotating speed sensor and the main system, the wire breakage detection is only additionally added to judge whether the cable is connected or not, and if the detection result is normal, the rotating speed sensor cannot be described as normally working electrically. If the cable is normally connected, the rotation speed sensor is electrically damaged, and the broken wire detection mechanism cannot detect the broken wire.
In summary, the existing method and device for judging the self faults of the rotating speed sensor are lacking.
Disclosure of Invention
In order to solve the problems, the invention provides a method and a device for detecting faults of a rotating speed sensor, which can rapidly judge whether the rotating speed sensor has faults or not by correlating the state of an output signal with the working state of the rotating speed sensor, thereby ensuring the safe operation of a controlled system.
In order to achieve the above object, the present invention provides a method for detecting a failure of a rotational speed sensor, comprising the steps of:
s1, setting output measurement signals of a to-be-measured rotating speed sensor as periodic pulse square waves, and setting output signals of two fault judgment output channels of the to-be-measured rotating speed sensor to be opposite in phase;
s2, judging the working state of the rotating speed sensor to be detected through judging the output signal state of the rotating speed sensor to be detected.
Preferably, in step S1, the excitation sources of the output signals of the two failure determination output channels are homologous.
Preferably, the excitation source is a grating or a hall element.
Preferably, the step S2 specifically includes the following steps:
s21, judging whether the two fault judging output channels output pulse signals or not, and executing a step S22 if the pulse signals exist;
s22, if the phases of the output signals of the two fault judgment output channels are opposite, judging that the current channel of the rotating speed sensor to be tested is in a normal working state;
if the output signals of the two fault judging output channels are both in a low level, judging that the current channel of the rotating speed sensor to be tested is in an open circuit state;
if the output signals of the two fault judging output channels are both in a high level, judging that the current channel of the rotating speed sensor to be tested is in a breakdown state.
Preferably, in step S1, the rotation speed sensor to be tested further includes a steering signal output channel, where the phase of the steering signal output channel is different from the phase of the output signals of the two fault judging output channels by 90 °.
A fault detection device of a rotating speed sensor comprises a rotating speed sensor to be detected and a detection mechanism;
the rotation speed sensor to be measured comprises an excitation source, a first excitation signal receiving and processing unit and a second excitation signal receiving and processing unit, wherein the first excitation signal receiving and processing unit and the second excitation signal receiving and processing unit are connected with the excitation source, the first excitation signal receiving and processing unit is connected with a fault judgment output channel A, the first excitation signal receiving and processing unit is also connected with a fault judgment output channel B through an inverse processing unit, and the second excitation signal receiving and processing unit is connected with a steering signal output channel C;
the detection mechanism comprises a CPU processing unit, wherein the input end of the CPU processing unit is respectively connected with the fault judgment output channel A, the fault judgment output channel B and the steering signal output channel C.
Preferably, the fault judgment output channel A, the fault judgment output channel B and the steering signal output channel C are respectively connected with the CPU processing unit through the pulse sampling processing unit.
The invention has the following beneficial effects:
1. by correlating the state of the output signal with the working state of the rotation speed sensor, whether the rotation speed sensor fails or not can be rapidly judged, so that the safe operation of the controlled system is ensured.
2. And by setting square wave signals and judging the phase difference of the square wave signals, judging the specific fault type of the rotating speed sensor to be tested.
3. The structure principle is simple, and the detection cost is low.
The technical scheme of the invention is further described in detail through the drawings and the embodiments.
Drawings
FIG. 1 is a flow chart of a method for detecting a failure of a rotational speed sensor according to the present invention;
fig. 2 is a block diagram of a failure detection apparatus for a rotation speed sensor according to the present invention.
Detailed Description
The present invention will be further described with reference to the accompanying drawings, and it should be noted that, while the present embodiment provides a detailed implementation and a specific operation process on the premise of the present technical solution, the protection scope of the present invention is not limited to the present embodiment.
Fig. 1 is a flowchart of a method for detecting a failure of a rotational speed sensor according to the present invention, as shown in fig. 1, the method for detecting a failure of a rotational speed sensor includes the following steps:
s1, setting output measurement signals of a to-be-measured rotating speed sensor as periodic pulse square waves, and setting output signals of two fault judgment output channels of the to-be-measured rotating speed sensor to be opposite in phase;
preferably, in step S1, the excitation sources of the output signals of the two fault determination output channels are homologous excitation sources, and are gratings or hall elements.
Preferably, in step S1, the rotation speed sensor to be tested further includes a steering signal output channel, where the phase of the steering signal output channel is different from the phase of the output signals of the two fault judging output channels by 90 °.
It should be noted that in this embodiment, other signal output channels may be further provided for outputting signals such as rotational speed, that is, the signal output channels are only examples of part of the output channels, and should not be interpreted as limiting the number of signal output channels.
S2, judging the working state of the rotating speed sensor to be detected through judging the output signal state of the rotating speed sensor to be detected.
Preferably, the step S2 specifically includes the following steps:
s21, judging whether the two fault judging output channels output pulse signals or not, and executing a step S22 if the pulse signals exist;
s22, if the phases of the output signals of the two fault judgment output channels are opposite, judging that the current channel of the rotating speed sensor to be tested is in a normal working state;
if the output signals of the two fault judging output channels are both in a low level, judging that the current channel of the rotating speed sensor to be tested is in an open circuit state;
if the output signals of the two fault judging output channels are both in a high level, judging that the current channel of the rotating speed sensor to be tested is in a breakdown state.
The rotation speed sensor to be tested in the step S1 further comprises a steering signal output channel, and the phase difference of the output signals of the steering signal output channel and the two fault judging output channels is 90 degrees. At this time, in the normal operation state determination in step S22, the following determination is also required: and when the phase difference of the output signals of the steering signal output channel and the two fault judging output channels is 90 degrees, judging that the current channel of the rotating speed sensor to be tested works normally.
A fault detection device of a rotating speed sensor comprises a rotating speed sensor to be detected and a detection mechanism;
the rotation speed sensor to be measured comprises an excitation source, a first excitation signal receiving and processing unit and a second excitation signal receiving and processing unit, wherein the first excitation signal receiving and processing unit and the second excitation signal receiving and processing unit are connected with the excitation source, the first excitation signal receiving and processing unit is connected with a fault judgment output channel A, the first excitation signal receiving and processing unit is also connected with a fault judgment output channel B through an inverse processing unit, and the second excitation signal receiving and processing unit is connected with a steering signal output channel C;
the detection mechanism comprises a CPU processing unit, wherein the input end of the CPU processing unit is respectively connected with the fault judgment output channel A, the fault judgment output channel B and the steering signal output channel C.
Preferably, the fault judgment output channel A, the fault judgment output channel B and the steering signal output channel C are respectively connected with the CPU processing unit through the pulse sampling processing unit.
To further illustrate the invention, the following examples are provided:
in this embodiment, the rotation speed sensor to be measured is provided with A, B, C three signal output channels, wherein A, B is a fault judging output channel, and C is a steering signal output channel;
which comprises the following steps:
the first step, setting the phase of the output signal of A, B channel to be opposite, and setting the phase difference between the output signals of C channel and A, B channel, wherein the phase difference in this embodiment can be set to 90 °;
step two, judging whether pulse signals exist in the three channels A, B, C, if so, further judging whether phase differences among the three channels A, B, C are set phase differences, if so, judging that the rotation speed sensor operates normally, and in the embodiment, if the phase difference relation is inconsistent with the setting, judging that the signals of the signal channels are abnormal; if the pulse signal does not exist, the state of the output signal of the A, B channel is further judged, if the two output signals are both in a low level, the rotation speed sensor is judged to be broken, and if the two output signals are both in a high level, the rotation speed sensor is judged to be broken down.
Therefore, the method and the device for detecting the faults of the rotating speed sensor with the structure can rapidly judge whether the rotating speed sensor has faults or not by correlating the state of the output signal with the working state of the rotating speed sensor, thereby ensuring the safe operation of a controlled system.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention and not for limiting it, and although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that: the technical scheme of the invention can be modified or replaced by the same, and the modified technical scheme cannot deviate from the spirit and scope of the technical scheme of the invention.
Claims (7)
1. A method for detecting faults of a rotating speed sensor is characterized in that: the method comprises the following steps:
s1, setting output measurement signals of a to-be-measured rotating speed sensor as periodic pulse square waves, and setting output signals of two fault judgment output channels of the to-be-measured rotating speed sensor to be opposite in phase;
s2, judging the working state of the rotating speed sensor to be detected through judging the output signal state of the rotating speed sensor to be detected.
2. The method for detecting a failure of a rotational speed sensor according to claim 1, wherein: in step S1, the excitation sources of the output signals of the two failure determination output channels are homologous.
3. The rotation speed sensor failure detection method according to claim 2, characterized in that: the excitation source is a grating or a Hall element.
4. A rotation speed sensor failure detection method according to any one of claims 1 to 3, characterized in that: the step S2 specifically comprises the following steps:
s21, judging whether the two fault judging output channels output pulse signals or not, and executing a step S22 if the pulse signals exist;
s22, if the phases of the output signals of the two fault judgment output channels are opposite, judging that the current channel of the rotating speed sensor to be tested is in a normal working state;
if the output signals of the two fault judging output channels are both in a low level, judging that the current channel of the rotating speed sensor to be tested is in an open circuit state;
if the output signals of the two fault judging output channels are both in a high level, judging that the current channel of the rotating speed sensor to be tested is in a breakdown state.
5. The method for detecting a failure of a rotational speed sensor according to claim 4, wherein: the rotation speed sensor to be tested in the step S1 further comprises a steering signal output channel, and the phase difference of the output signals of the steering signal output channel and the two fault judging output channels is 90 degrees.
6. The fault detection device of the rotating speed sensor is characterized by comprising a rotating speed sensor to be detected and a detection mechanism;
the rotation speed sensor to be measured comprises an excitation source, a first excitation signal receiving and processing unit and a second excitation signal receiving and processing unit, wherein the first excitation signal receiving and processing unit and the second excitation signal receiving and processing unit are connected with the excitation source, the first excitation signal receiving and processing unit is connected with a fault judgment output channel A, the first excitation signal receiving and processing unit is also connected with a fault judgment output channel B through an inverse processing unit, and the second excitation signal receiving and processing unit is connected with a steering signal output channel C;
the detection mechanism comprises a CPU processing unit, wherein the input end of the CPU processing unit is respectively connected with the fault judgment output channel A, the fault judgment output channel B and the steering signal output channel C.
7. The rotation speed sensor failure detection apparatus according to claim 6, wherein: the fault judgment output channel A, the fault judgment output channel B and the steering signal output channel C are respectively connected with the CPU processing unit through the pulse sampling processing unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310468373.0A CN117192146A (en) | 2023-04-27 | 2023-04-27 | Method and device for detecting faults of rotating speed sensor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310468373.0A CN117192146A (en) | 2023-04-27 | 2023-04-27 | Method and device for detecting faults of rotating speed sensor |
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| CN117192146A true CN117192146A (en) | 2023-12-08 |
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| CN202310468373.0A Pending CN117192146A (en) | 2023-04-27 | 2023-04-27 | Method and device for detecting faults of rotating speed sensor |
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| CN (1) | CN117192146A (en) |
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- 2023-04-27 CN CN202310468373.0A patent/CN117192146A/en active Pending
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