CN212567263U - Detection device of eddy current sensor - Google Patents
Detection device of eddy current sensor Download PDFInfo
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- CN212567263U CN212567263U CN202021097614.3U CN202021097614U CN212567263U CN 212567263 U CN212567263 U CN 212567263U CN 202021097614 U CN202021097614 U CN 202021097614U CN 212567263 U CN212567263 U CN 212567263U
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Abstract
The utility model provides an eddy current sensor's detection device, include: the device comprises a sensor mounting bracket, a dial indicator mounting support, a dial indicator and acquisition and analysis equipment; when a rotor in the rotary mechanical equipment rotates according to a preset rule, the eddy current sensor detects a first relative displacement signal between the rotor and the sensor mounting bracket, and the dial indicator detects a second relative displacement signal between the rotor and the sensor mounting bracket. The acquisition and analysis equipment acquires the first relative displacement signal and the second relative displacement signal, and determines the working state of the eddy current sensor based on the linear error of the first relative displacement signal and the second relative displacement signal. In the scheme, the acquisition and analysis equipment synchronously acquires the second relative displacement signal detected by the dial indicator and the first relative displacement signal detected by the eddy current sensor, and calculates the linear error of the second relative displacement signal and the linear error of the first relative displacement signal, so that the working state of the eddy current sensor can be determined.
Description
Technical Field
The utility model relates to a mechanical testing technical field especially relates to an eddy current sensor's detection device.
Background
The eddy current sensor is mainly applied to rotary mechanical equipment as a monitoring and diagnosis device, such as: steam turbines, water turbines, blowers, compressors, air compressors, gear boxes, large cooling pumps and the like. In the process of using the rotating mechanical equipment, the radial vibration, the axial displacement, the phase discrimination, the shaft rotating speed, the expansion difference, the eccentricity and the like of the rotating mechanical equipment can be monitored, diagnosed and protected on line through the eddy current sensor.
At present, before the eddy current sensor is applied to the rotating mechanical equipment, the state of the eddy current sensor is verified in a laboratory, and the verified eddy current sensor can be applied to the rotating mechanical equipment. However, in practical application of the rotary machine, if the rotary machine has phenomena such as a large shaft surface plating layer, a large shaft surface magnetization, a large shaft surface mechanical defect, and an electromagnetic field generated in the surrounding environment of the rotary machine, the operating state of the eddy current sensor is disturbed, and the operating state of the eddy current sensor is abnormal.
Therefore, how to provide an eddy current sensor's detection device to detect eddy current sensor's operating condition is the utility model discloses the problem that awaits a urgent need to solve.
SUMMERY OF THE UTILITY MODEL
In view of this, the embodiment of the present invention provides a detection apparatus for an eddy current sensor, so as to solve the problem that an abnormal operating state occurs in the eddy current sensor in the prior art.
In order to achieve the above object, the embodiment of the present invention provides the following technical solutions:
the embodiment of the utility model provides an aspect shows an eddy current sensor's detection device, eddy current sensor's detection device includes: the device comprises a sensor mounting bracket, a dial indicator mounting support, a dial indicator and acquisition and analysis equipment;
the sensor mounting bracket is fixed on a bearing seat of rotary mechanical equipment, the eddy current sensor is arranged on the sensor mounting bracket, and when a rotor in the rotary mechanical equipment rotates according to a preset rule, the eddy current sensor detects a first relative displacement signal between the rotor and the sensor mounting bracket in real time;
the dial indicator is fixed on the sensor mounting support through the dial indicator mounting support, a probe in the dial indicator penetrates through the sensor mounting support to be in contact with the surface of a rotor in the rotary mechanical equipment, and the dial indicator detects a second relative displacement signal between the rotor and the sensor mounting support in real time when the rotor in the rotary mechanical equipment rotates according to a preset rule;
the acquisition and analysis equipment is respectively connected with the eddy current sensor and the dial indicator, acquires the first relative displacement signal and the second relative displacement signal, and determines the working state of the eddy current sensor based on the linear error of the first relative displacement signal and the second relative displacement signal.
Optionally, the dial indicator mounting support comprises a fixing part and a supporting part;
the supporting component is fixed on the sensor mounting bracket;
one end of the fixing part is connected with the supporting part, and the other end of the fixing part is used for fixing the dial indicator.
Optionally, the dial indicator comprises a dial indicator and a probe;
the probe bundle of the probe is clamped at the other end of the fixing part, the fixed end of the probe is connected with the dial indicator, and the probe penetrates through the sensor mounting bracket to be in contact with a rotor in the rotary mechanical equipment;
and the signal end of the dial indicator is connected with the acquisition and analysis equipment, and the dial indicator detects a second relative displacement signal between the rotor and the sensor mounting bracket through the probe.
Optionally, the dial indicator mounting support is fixed on the sensor mounting bracket in a magnetic attraction manner.
Optionally, the collection and analysis device includes: a data acquisition instrument and an analysis system;
the data acquisition instrument is respectively connected with the eddy current sensor and the dial indicator, and the data acquisition instrument is connected with the analysis system;
the data acquisition instrument acquires a first relative displacement signal detected by the eddy current sensor and a second relative displacement signal detected by the dial indicator in real time and sends the first relative displacement signal and the second relative displacement signal to the analysis system;
the analysis system determines an operating state of the eddy current sensor based on a linearity error of the first relative displacement signal and the second relative displacement signal.
Optionally, the method further includes: an alarm;
the alarm is connected with the analysis system and gives an alarm when the analysis system determines that a first relative displacement signal between the rotor and the sensor mounting bracket detected by the eddy current sensor is in an abnormal state.
Based on above-mentioned the embodiment of the utility model provides a pair of eddy current sensor's detection device, eddy current sensor's detection device includes: the device comprises a sensor mounting bracket, a dial indicator mounting support, a dial indicator and acquisition and analysis equipment; the sensor mounting bracket is fixed on a bearing seat of the rotary mechanical equipment, and the eddy current sensor is arranged on the sensor mounting bracket; the dial indicator is fixed on the sensor mounting bracket through a dial indicator mounting support, and a probe in the dial indicator penetrates through the sensor mounting bracket to be in contact with the surface of a rotor in the rotary mechanical equipment; the acquisition and analysis equipment is respectively connected with the eddy current sensor and the dial indicator. When a rotor in the rotary mechanical equipment rotates according to a preset rule, the eddy current sensor detects a first relative displacement signal between the rotor and the sensor mounting bracket in real time. And when the rotor in the rotary mechanical equipment rotates according to a preset rule, the dial indicator detects a second relative displacement signal between the rotor and the sensor mounting bracket in real time. The acquisition and analysis equipment acquires the first relative displacement signal and the second relative displacement signal, and determines the working state of the eddy current sensor based on the linear error of the first relative displacement signal and the second relative displacement signal. The embodiment of the utility model provides an in, detect the second relative displacement signal between rotor and the sensor installing support through the percentage table, gather the second relative displacement signal that analytical equipment gathered the percentage table and detected and the first relative displacement signal between rotor and the sensor installing support that eddy current sensor detected in step to calculate the linear error of second relative displacement signal and first relative displacement signal, thereby can confirm eddy current sensor's operating condition.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a block diagram of a detection apparatus of an eddy current sensor according to an embodiment of the present invention;
fig. 2 is a specific structural block diagram of a detection apparatus of an eddy current sensor according to an embodiment of the present invention;
fig. 3 is a block diagram of a detection apparatus of another eddy current sensor according to an embodiment of the present invention.
Wherein, 01 is a rotor, 10 is a sensor mounting bracket, 20 percent meter mounting support, 30 is a percent meter, 40 is a collection analysis device, 50 is a bearing seat, 60 is an alarm, and 70 is an eddy current sensor; 21 is a fixed part, 22 is a supporting part, 31 is a dial indicator, 32 is a probe, 41 is a data acquisition instrument, and 42 is an analysis system.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In this application, 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 an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The embodiment of the utility model provides an in, detect the second relative displacement signal between rotor and the sensor installing support through the percentage table, gather the second relative displacement signal that analytical equipment gathered the percentage table and detected and the first relative displacement signal between rotor and the sensor installing support that eddy current sensor detected in step to calculate the linear error of second relative displacement signal and first relative displacement signal, thereby can confirm eddy current sensor's operating condition.
Referring to fig. 1, for the embodiment of the present invention provides a structural schematic diagram of a detection apparatus of an eddy current sensor, the detection apparatus of the eddy current sensor includes: the device comprises a sensor mounting bracket 10, a dial indicator mounting support 20, a dial indicator 30 and acquisition and analysis equipment 40.
The sensor mounting bracket 10 is fixed to the bearing housing 50 of the rotary machine, and the eddy current sensor 70 is provided on the sensor mounting bracket 10. The eddy current sensor 70 detects a first relative displacement signal between the rotor and the sensor mounting bracket 10 in real time while the rotor in the rotary machine rotates according to a preset rule.
It should be noted that the bearing of the bearing housing 50 is used to fix the rotor, so that the sensor mounting bracket 10 and the rotor are in the detection range of the eddy current sensor 70 and the dial indicator 30.
Optionally, in order to prevent the eddy current sensor 70 from detecting inaccurately due to the presence of oil and other substances on the surface of the rotor of the rotating mechanical device, the surface of the rotor above the eddy current sensor 70 needs to be cleaned before the eddy current sensor 70 detects the first relative displacement signal between the rotor and the sensor mounting bracket 10.
It should be noted that the eddy current sensor 70 includes an eddy current sensor 70 probe, a pre-set, and a power supply.
The probe of the eddy current sensor 70 is connected with the prepositioner, the probe of the eddy current sensor 70 is arranged below the rotor of the rotating mechanical equipment, and the power supply is connected with the prepositioner and used for providing power supply for the eddy current sensor 70.
The initial distance between the probe of the eddy current sensor 70 and the rotor of the rotating mechanical device is set by a person skilled in the art in advance according to the testing requirements of the eddy current sensor 70, and the embodiments of the present invention are not limited thereto.
In a specific implementation, when the rotor in the rotating mechanical device rotates according to a preset rule, according to the electromagnetic induction principle, the probe of the eddy current sensor 70 generates a magnetic field between the rotor and the sensor mounting bracket 10 and reacts on the pre-set of the eddy current sensor 70, so that the eddy current sensor 70 detects the relative displacement between the rotor and the sensor mounting bracket 10 and the rotation angle of the rotor, and the eddy current sensor 70 generates a first relative displacement signal based on the detected relative displacement between the rotor and the sensor mounting bracket 10, and sends the first relative displacement signal and the rotation angle of the rotor to the analysis and acquisition device 40.
It should be noted that the magnitude of the first relative displacement signal varies with the relative displacement between the probe of the eddy current sensor 70 and the rotor surface.
A mapping relation exists between the rotation angle of the rotor and the first relative displacement signals, namely each rotation angle corresponds to one first relative displacement signal.
The preset rule is set through a plurality of experiments, and can also be set according to the experience of the technical personnel in the field, and can be set according to the actual situation, the embodiment of the utility model provides a do not put restrictions.
Such as: the rotor in the rotary mechanical equipment can slowly rotate for one circle at a uniform speed, namely, the rotor slowly rotates for 360 degrees at a uniform speed.
The starting position of the rotor in the rotary mechanical equipment when the rotor rotates according to the preset rule can be any position of the rotor.
Such as: when the pointer of the dial in the dial indicator 30 is adjusted to be zero, the position where the probe of the dial indicator 30 is in contact with the surface of the rotor can be set as the starting position of the rotation of the rotor.
The dial indicator 30 is fixed on the sensor mounting support 10 through the dial indicator mounting support 20, a probe in the dial indicator 30 penetrates through the sensor mounting support 10 to be in contact with the surface of a rotor in the rotary mechanical equipment, and when the rotor in the rotary mechanical equipment rotates according to a preset rule, the dial indicator 30 detects a second relative displacement signal between the rotor and the sensor mounting support 10 in real time.
It should be noted that, the distance between the dial indicator 30 and the eddy current sensor 70 is set by a person skilled in the art in advance according to the test requirements of the eddy current sensor 70, and the embodiment of the present invention is not limited thereto.
The initial spacing of the dial indicator 30 from the rotor of the rotating machine is equal to the initial spacing of the probe of the eddy current sensor 70 from the rotor of the rotating machine.
Optionally, the dial indicator mounting support 20 is fixed on the sensor mounting bracket 10 by means of magnetic attraction, clamping and the like.
In order to ensure that the detection positions of the dial indicator 30 and the eddy current sensor 70 are matched, the probe of the eddy current sensor 70 and the probe of the dial indicator 30 need to be arranged on the same bus of the rotor. Specifically, when the rotor rotates according to the preset rule, the eddy current sensor 70 and the dial indicator 30 are located on the same rotating line of the rotor surface, i.e. a line parallel to the axis of the rotor.
In a specific implementation, the dial indicator 30 detects the relative displacement between the rotor and the sensor mounting bracket 10 and the rotation angle of the rotor in real time, and the dial indicator 30 generates a second relative displacement signal based on the detected relative displacement between the rotor and the sensor mounting bracket 10, and sends the second relative displacement signal and the rotation angle of the rotor to the analysis and acquisition device 40.
It should be noted that a mapping relationship exists between the rotation angle of the rotor and the second relative displacement signal, that is, each rotation angle corresponds to one second relative displacement signal.
The collection and analysis device 40 is connected to the eddy current sensor 70 and the dial indicator 30, respectively, the collection and analysis device 40 collects a first relative displacement signal and a second relative displacement signal, and determines the operating state of the eddy current sensor 70 based on the linear error of the first relative displacement signal and the second relative displacement signal.
In a specific implementation, the acquisition and analysis device 40 synchronously acquires a first relative displacement signal sent by the eddy current sensor 70 and a second relative displacement signal sent by the dial indicator 30 in real time at the same rotation angle of the rotor. Calculating the linear error of the first relative displacement signal and the second relative displacement signal based on the first relative displacement signal and the second relative displacement signal, and judging whether the linear error of the first relative displacement signal and the second relative displacement signal is in a preset range. If the linear error is within the preset range, it is determined that the operating state of the eddy current sensor 70 is normal, so that the eddy current sensor can be normally used on the rotating mechanical equipment, and if the linear error is not within the preset range, it is determined that the operating state of the eddy current sensor 70 is abnormal, i.e., the eddy current sensor 70 cannot accurately detect the relative displacement between the rotor and the sensor mounting bracket 10.
Alternatively, if the abnormal operating state of the eddy current sensor 70 is caused by mechanical deviation due to the rotor of the rotating mechanical device being out of round or not smooth, or electrical deviation due to residual magnetism existing in the bearing of the rotating mechanical device. The mechanical and/or electrical deviations of the rotating machine measured can be eliminated by correcting the initial recording of the eddy current sensor, etc.
Alternatively, if the abnormal operating state of the eddy current sensor 70 is not caused by the rotating machine itself, another eddy current displacement sensor may be used instead.
The preset range is set through many times of experiments, also can set up according to the experience of technical personnel in the field, can set up according to actual conditions to this, the embodiment of the utility model is not restricted.
Such as: and may be set from minus 0.025 mm to plus 0.025 mm.
The embodiment of the utility model provides an in, detect the second relative displacement signal between rotor and the sensor installing support through the percentage table to and detect the first relative displacement signal between rotor and the sensor installing support through eddy current sensor. The acquisition and analysis equipment synchronously acquires a second relative displacement signal detected by the dial indicator and a first relative displacement signal between a rotor and a sensor mounting bracket detected by the eddy current sensor, and calculates the linear error of the second relative displacement signal and the first relative displacement signal, so as to determine the working state of the eddy current sensor. When the eddy current sensor is applied to a rotating mechanical device, the operating state of the eddy current sensor can be detected.
Optionally, based on the above-mentioned detection apparatus for the eddy current sensor that shows, the embodiment of the present invention further shows a specific structure of the dial indicator mounting support 20, the dial indicator 30 and the collection analysis device 40, as shown in fig. 2.
The dial indicator mounting bracket 20 includes: a fixing member 21 and a support member 22.
The support member 22 is fixed to the sensor mounting bracket 10, and specifically, the support member 22 is fixed below the sensor mounting bracket 10 by means of magnetic attraction.
One end of the fixing member 21 is connected to the support member 22, and the other end is used to fix the dial indicator 30.
The dial indicator 30 includes: a dial gauge 31 and a probe 32, wherein the probe 32 comprises a needle bundle and a probe head.
Optionally, the dial gauge 31 includes a dial for displaying the relative displacement between the rotor and the sensor mounting bracket 10 and the rotation angle of the rotor.
The needle bundle of the probe 32 is clamped at the other end of the fixed part 21, the fixed end of the probe 32 is connected with the dial indicator 31, and the probe penetrates through the sensor mounting bracket 10 to be in contact with a rotor in the rotating mechanical equipment.
The signal end of the dial indicator 31 is connected to the acquisition and analysis device 40, and the dial indicator 31 detects a second relative displacement signal between the rotor and the sensor mounting bracket 10 through the probe 32.
In a specific implementation, the dial indicator 31 detects the relative displacement between the rotor and the sensor mounting bracket 10 and the rotation angle of the rotor in real time through the probe 32, and displays the relative displacement between the rotor and the sensor mounting bracket 10 and the rotation angle of the rotor in a dial plate of the dial indicator 31; the dial indicator 31 generates a second relative displacement signal based on the detected relative displacement between the rotor and the sensor mounting bracket 10, and transmits the second relative displacement signal and the rotation angle of the rotor to the analysis acquisition device 40.
With continued reference to fig. 2, the acquisition and analysis device 40 includes: a data collector 41 and an analysis system 42.
The data acquisition instrument 41 is respectively connected with the eddy current sensor 70 and the dial indicator 30, the data acquisition instrument 41 is connected with the analysis system 42, specifically, the input end of the data acquisition instrument 41 is respectively connected with the front-end device of the eddy current sensor 70 and the dial indicator 31 of the dial indicator 30, and the output end of the data acquisition instrument 41 is connected with the analysis system 42.
The data collector 41 collects a first relative displacement signal detected by the eddy current sensor 70 and a second relative displacement signal detected by the dial indicator 30 in real time, and sends the signals to the analysis system 42.
In a specific implementation, the data collector 41 synchronously collects a first relative displacement signal detected by the eddy current sensor 70 and a second relative displacement signal detected by the dial indicator 30 at the same rotation angle of the rotor, and records a mapping relationship between the rotation angle of each rotor and the first relative displacement signal and a mapping relationship between the rotation angle of each rotor and the second relative displacement signal. And sending all the collected first relative displacement signals, all the collected second relative displacement signals, the mapping relation between the rotation angle of each rotor and the first relative displacement signals, and the mapping relation between the rotation angle of each rotor and the second relative displacement signals to the analysis system 42 within the time period that the rotors rotate according to the preset rule.
It should be noted that the time period of the rotor rotating according to the preset rule is used for indicating the time required for the rotor to rotate according to the preset rule. Such as: the rotor slowly rotates at a uniform speed for 360 degrees.
In a specific implementation, the analysis system 42 generates a measured curve according to a mapping relationship between the received rotation angle of each rotor and the first relative displacement signal, where an abscissa of the measured curve is the rotation angle of the rotor, and an ordinate is the relative displacement corresponding to the first relative displacement signal.
The analysis system 42 generates a test curve according to the mapping relationship between the received rotation angle of each rotor and the second relative displacement signal, wherein the abscissa of the test curve is the rotation angle of the rotor, and the ordinate is the relative displacement corresponding to the second relative displacement signal.
The analysis system 42 compares the measured curve with the test curve, specifically, determines a value corresponding to the ordinate of the measured curve and a value corresponding to the ordinate of the test curve at the same rotation angle, calculates a ratio of the value corresponding to the ordinate of the measured curve and the value corresponding to the ordinate of the test curve at the same rotation angle, and calculates an average value corresponding to the ratio of the value corresponding to the ordinate of the measured curve and the value corresponding to the ordinate of the test curve, that is, a linear error between the measured curve and the test curve, based on the ratio of the value corresponding to the ordinate of the measured curve and the value corresponding to the ordinate of the test curve. And judging whether the linear error between the actual measurement curve and the test curve is within a preset range, if so, determining that the working state of the eddy current sensor 70 is normal, so that the eddy current sensor can be normally applied to the rotating mechanical equipment, and if not, determining that the working state of the eddy current sensor 70 is abnormal.
The abscissa of the measured curve is the same as the abscissa of the test curve.
The embodiment of the utility model provides an in, detect the second relative displacement signal between rotor and the sensor installing support through the percentage table to and detect the first relative displacement signal between rotor and the sensor installing support through eddy current sensor. The acquisition and analysis equipment synchronously acquires a second relative displacement signal detected by the dial indicator and a first relative displacement signal between a rotor detected by the eddy current sensor and the sensor mounting bracket, and calculates a linear error of the second relative displacement signal and the first relative displacement signal, so as to determine the working state of the eddy current sensor. When the eddy current sensor is applied to a rotating mechanical device, the operating state of the eddy current sensor can be detected.
Optionally, based on the above embodiment of the present invention, the detecting device of the eddy current sensor shown in fig. 2 is based on the detecting device of the eddy current sensor disclosed above, as shown in fig. 3, further including: an alarm 60.
An alarm 60 is connected to the analysis system 42, the alarm 60 alarming when the analysis system 42 determines that the first relative displacement signal between the rotor and the sensor mounting bracket detected by the eddy current sensor 70 is in an abnormal state.
It should be noted that the alarm 60 includes at least a buzzer alarm and a photoelectric alarm, and the embodiment of the present invention is not limited thereto.
Specifically, if the alarm 60 is a buzzer alarm, when the analysis system 42 determines that the linear error between the second relative displacement signal and the first relative displacement signal is not within the preset range, the buzzer alarm determines that the eddy current sensor cannot be normally applied to the rotating mechanical equipment, and sounds a buzzer alarm, so that a worker can adjust parameters of the rotating mechanical equipment or start corresponding protective measures.
The embodiment of the utility model provides an in, detect the second relative displacement signal between rotor and the sensor installing support through the percentage table to and detect the first relative displacement signal between rotor and the sensor installing support through eddy current sensor. The acquisition and analysis equipment synchronously acquires a second relative displacement signal detected by the dial indicator and a first relative displacement signal between a rotor detected by the eddy current sensor and the sensor mounting bracket, and calculates a linear error of the second relative displacement signal and the first relative displacement signal, so as to determine the working state of the eddy current sensor. When the eddy current sensor is applied to a rotating mechanical device, the operating state of the eddy current sensor can be detected. And then remind staff or user when the operating condition of eddy current sensor is unusual to staff or user start corresponding safeguard measure.
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 detection device of an eddy current sensor is characterized by comprising: the device comprises a sensor mounting bracket, a dial indicator mounting support, a dial indicator and acquisition and analysis equipment;
the sensor mounting bracket is fixed on a bearing seat of rotary mechanical equipment, the eddy current sensor is arranged on the sensor mounting bracket, and when a rotor in the rotary mechanical equipment rotates according to a preset rule, the eddy current sensor detects a first relative displacement signal between the rotor and the sensor mounting bracket in real time;
the dial indicator is fixed on the sensor mounting support through the dial indicator mounting support, a probe in the dial indicator penetrates through the sensor mounting support to be in contact with the surface of a rotor in the rotary mechanical equipment, and the dial indicator detects a second relative displacement signal between the rotor and the sensor mounting support in real time when the rotor in the rotary mechanical equipment rotates according to a preset rule;
the acquisition and analysis equipment is respectively connected with the eddy current sensor and the dial indicator, acquires the first relative displacement signal and the second relative displacement signal, and determines the working state of the eddy current sensor based on the linear error of the first relative displacement signal and the second relative displacement signal.
2. The eddy current sensor testing apparatus according to claim 1, wherein the dial indicator mounting seat comprises a fixing member and a supporting member;
the supporting component is fixed on the sensor mounting bracket;
one end of the fixing part is connected with the supporting part, and the other end of the fixing part is used for fixing the dial indicator.
3. The eddy current sensor testing device according to claim 2, wherein the dial indicator comprises a dial indicator and a probe;
the probe bundle of the probe is clamped at the other end of the fixing part, the fixed end of the probe is connected with the dial indicator, and the probe penetrates through the sensor mounting bracket to be in contact with a rotor in the rotary mechanical equipment;
and the signal end of the dial indicator is connected with the acquisition and analysis equipment, and the dial indicator detects a second relative displacement signal between the rotor and the sensor mounting bracket through the probe.
4. The eddy current sensor testing device according to any one of claims 1 to 3, wherein the dial indicator mounting support is fixed to the sensor mounting bracket by means of magnetic attraction.
5. The eddy current sensor testing apparatus according to claim 1, wherein the collection and analysis device comprises: a data acquisition instrument and an analysis system;
the data acquisition instrument is respectively connected with the eddy current sensor and the dial indicator, and the data acquisition instrument is connected with the analysis system;
the data acquisition instrument acquires a first relative displacement signal detected by the eddy current sensor and a second relative displacement signal detected by the dial indicator in real time and sends the first relative displacement signal and the second relative displacement signal to the analysis system;
the analysis system determines an operating state of the eddy current sensor based on a linearity error of the first relative displacement signal and the second relative displacement signal.
6. The eddy current sensor testing apparatus according to claim 5, further comprising: an alarm;
the alarm is connected with the analysis system and gives an alarm when the analysis system determines that a first relative displacement signal between the rotor and the sensor mounting bracket detected by the eddy current sensor is in an abnormal state.
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| CN202021097614.3U CN212567263U (en) | 2020-06-15 | 2020-06-15 | Detection device of eddy current sensor |
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| CN202021097614.3U CN212567263U (en) | 2020-06-15 | 2020-06-15 | Detection device of eddy current sensor |
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