CN117537755A - Test device for performance test of displacement sensor and control method - Google Patents
Test device for performance test of displacement sensor and control method Download PDFInfo
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- CN117537755A CN117537755A CN202311366887.1A CN202311366887A CN117537755A CN 117537755 A CN117537755 A CN 117537755A CN 202311366887 A CN202311366887 A CN 202311366887A CN 117537755 A CN117537755 A CN 117537755A
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- motor
- limit switch
- controller
- switch sensor
- automatic calibration
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- 238000006073 displacement reaction Methods 0.000 title claims abstract description 78
- 238000012360 testing method Methods 0.000 title claims abstract description 52
- 238000000034 method Methods 0.000 title claims description 16
- 238000011056 performance test Methods 0.000 title claims description 5
- 230000003044 adaptive effect Effects 0.000 claims abstract description 5
- 230000003068 static effect Effects 0.000 claims description 11
- 230000005540 biological transmission Effects 0.000 claims description 3
- 230000003631 expected effect Effects 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 2
- 238000005259 measurement Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 125000004122 cyclic group Chemical group 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/02—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness
- G01B21/04—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness by measuring coordinates of points
- G01B21/042—Calibration or calibration artifacts
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The test device for testing the performance of the displacement sensor comprises a plurality of automatic calibration tables, a frequency converter, a controller and an information acquisition system, wherein the automatic calibration tables are driven to run by a motor, the motor is electrically connected with the frequency converter, the frequency converter is electrically connected with the controller to be controlled, the displacement sensor for testing is arranged on the automatic calibration tables, and the displacement sensor is electrically connected with the information acquisition system; the automatic calibration table is provided with a reverse limit switch sensor and a forward limit switch sensor which are used for controlling the running state of the motor, and the reverse limit switch sensor and the forward limit switch sensor are electrically connected with the controller; the frequency converter, the controller and the information acquisition system are respectively connected with an adaptive power supply. Through the structure, uninterrupted testing of a plurality of displacement sensors can be realized at the same time, and dynamic displacement testing of the displacement sensors can be completed.
Description
Technical Field
The invention relates to the technical field of safety monitoring of water conservancy and hydropower engineering, in particular to a test device and a control method for performance test of a displacement sensor.
Background
The displacement in the test of the displacement (seam measurement) sensor is provided by manually operating a displacement platform in the traditional method, and the position of the sliding fixing clamp is changed by forward and reverse shaking of the handle, so that the purpose of changing the displacement is achieved, namely, the sensor is lengthened or compressed. The existing manual test mode can be used for testing the performance of a single displacement (seam testing) sensor under static displacement, and mainly has the following problems:
(1) Manual hand shaking is needed, and the dynamic displacement (time-varying displacement) test of the displacement sensor cannot be completed;
(2) The displacement cannot be synchronously performed, the operation consistency is poor, and the comparison measurement of a plurality of sensors is difficult to realize;
(3) Providing 24h dynamic displacement is not satisfactory.
Disclosure of Invention
The invention aims to solve the technical problems that: the test device and the control method for the performance test of the displacement sensors are provided for solving the problems in the background art, realizing continuous 24-hour test on a plurality of displacement sensors at the same time, and completing dynamic displacement test of the displacement sensors.
In order to achieve the technical characteristics, the aim of the invention is realized in the following way: the test device for testing the performance of the displacement sensor comprises a plurality of automatic calibration tables, a frequency converter, a controller and an information acquisition system, wherein the automatic calibration tables are driven to operate by a motor, the motor is electrically connected with the frequency converter, the frequency converter is electrically connected with the controller to be controlled, the displacement sensor for testing is arranged on the automatic calibration tables, and the displacement sensor is electrically connected with the information acquisition system; the automatic calibration table is provided with a reverse limit switch sensor and a forward limit switch sensor which are used for controlling the running state of the motor, and the reverse limit switch sensor and the forward limit switch sensor are electrically connected with the controller; the frequency converter, the controller and the information acquisition system are respectively connected with an adaptive power supply.
The automatic calibration platform comprises a frame body and a sliding seat, wherein two sliding rails are arranged in the frame body, the sliding seat is arranged on the two sliding rails in a sliding manner, a screw rod is arranged on the sliding seat in a screwed connection mode, one end of the screw rod extends out of the frame body, a motor is arranged at one end, extending out of the screw rod, of the frame body, an output shaft of the motor is in transmission connection with the screw rod, and a displacement sensor for testing is arranged between the frame body and the sliding seat and in the axial direction of the screw rod; the anti-limit switch sensor and the positive limit switch sensor are respectively arranged on the frame body and used for detecting the position of the sliding seat.
The sliding seat comprises a driving plate and a traction plate, the driving plate and the traction plate are connected and fixed through a connecting piece, a screw rod is in threaded connection and matched with the driving plate, and a displacement sensor for testing is arranged between the traction plate and the sliding seat and in the axial direction of the screw rod; the anti-limit switch sensor is used for detecting the position of the driving plate, and the positive limit switch sensor is used for detecting the position of the traction plate.
The control method of the test device for testing the performance of the displacement sensor comprises the following steps:
step 1: according to the calibration requirements and the calibration quantity of the displacement sensors, a plurality of automatic calibration tables are configured, the motor is respectively and electrically connected with a plurality of frequency converters, the frequency converters are electrically connected with the controller, and the inverse limit switch sensor and the positive limit switch sensor on each movable calibration table are respectively and electrically connected with the controller; writing the motor forward rotation time T1, the motor reverse rotation time T2, the motor keeping static time T3 and the running parameters of each frequency converter into the controller through a PC program;
step 2: sequentially fixing the detected displacement sensors on an automatic calibration table, enabling the displacement sensors to be in a free state, rotating a screw on the automatic calibration table after the installation and fixation are finished, enabling each displacement sensor to be positioned between a corresponding inverse limit switch sensor and a corresponding positive limit switch sensor, and enabling all the displacement sensors to be connected to an information acquisition system;
step 3: the frequency converter, the controller and the information acquisition system are respectively connected with an adaptive power supply for debugging, whether the set parameters of the frequency converter, the motor forward rotation time T1, the motor reverse rotation time T2 and the motor keeping static time T3 are consistent with expected effects or not is determined, and if the parameters are inconsistent, the controller or the frequency converter can be used for adjusting and setting;
step 4: after the debugging is finished, starting a controller, enabling an automatic calibration platform to enter an automatic operation state, firstly judging the position of a sliding seat through a reverse limit switch sensor and a positive limit switch sensor, judging whether the sliding seat is at a limit position, if not, enabling a motor to rotate forwards for a period of T1, and if so, entering the next step;
step 5: according to the setting, keeping a static state of the T3 time length;
step 6: the controller carries out limit judgment again, judges whether the sliding seat is at a forward rotation limit position, if not, the motor rotates forward for a period of T1, and if so, the next step is carried out;
step 7: according to the setting, the motor reversely rotates for a period of T2;
step 8: and (4) keeping static according to the setting, then entering a limit judgment, and circulating to a judgment Step in Step 4, and entering an automatic operation state from the equipment.
The invention has the following beneficial effects:
1. the automatic setting and control of the displacement and the periodic displacement change mode are realized, and the provided dynamic displacement has good repeatability and high accuracy.
2. The device is compact in whole, easy to install, convenient to debug, good in operation consistency and capable of realizing synchronous test of dynamic displacement measurement of a plurality of sensors.
3. The automatic control of 24h continuous dynamic displacement is realized, the daily maintenance workload is less, and the unattended operation is realized.
Drawings
FIG. 1 is a schematic view of an automatic calibration stand according to the present invention.
FIG. 2 is a schematic diagram of the automatic calibration station control of the present invention.
FIG. 3 is a control schematic block diagram of the present invention employing a plurality of automatic calibration stations for testing.
FIG. 4 is a schematic block diagram of a plurality of automatic calibration stations according to the present invention.
FIG. 5 is a flow chart of a control method of the present invention.
FIG. 6 is a line of the load-varying displacement process of the vibrating wire type seam meter.
FIG. 7 is a line of the load-varying displacement process of the differential resistance type seam meter.
In the figure: the automatic calibration device comprises an automatic calibration table 10, a frame 11, a sliding rail 12, a driving plate 13, a traction plate 14, a connecting piece 15, a screw 16, a motor 17, an inverse limit switch sensor 18, a positive limit switch sensor 19, a displacement sensor 20, a frequency converter 30, a controller 40 and an information acquisition system 50.
Detailed Description
Embodiments of the present invention will be further described with reference to the accompanying drawings.
Embodiment one:
referring to fig. 1-4, a test device for testing performance of a displacement sensor comprises a plurality of automatic calibration tables 10, a frequency converter 30, a controller 40 and an information acquisition system 50, wherein the automatic calibration tables 10 are driven to run by a motor 17, the motor 17 is electrically connected with the frequency converter 30, the frequency converter 30 is electrically connected with the controller 40 to be controlled, the displacement sensor 20 for testing is arranged on the automatic calibration tables 10, and the displacement sensor 20 is electrically connected with the information acquisition system; the automatic calibration table is provided with a reverse limit switch sensor 18 and a forward limit switch sensor 19 for controlling the running state of the motor, and the reverse limit switch sensor 18 and the forward limit switch sensor 19 are electrically connected with a controller 40; the frequency converter 30, the controller 40 and the information acquisition system 50 are respectively connected with an adapted power supply. Through the structure, the continuous test of a plurality of displacement sensors for 24 hours can be realized, and the dynamic displacement test of the displacement sensors can be completed.
The invention consists of 1 controller 40 and a number of automatic calibration stations 10, as shown in fig. 2. Wherein the controller 40 is composed of an industrial PLC and a control circuit, the frequency converter 30 is in one-to-one correspondence with the automatic calibration table 10,
the controller 40 is responsible for the circuit and signal control of the whole test device and supports the realization of the forward rotation, reverse rotation, stop time and variable frequency speed regulation setting of the motor 17 through an editable program; the frequency converter 30 is a rotation speed modulation unit connected with the PLC and the motor 17, and is responsible for transmitting signals of external manual speed regulation to the controller 40 and the motor, and controlling the motor speed in a specified range. In the automatic calibration table 10, the motor 17 is a 220V alternating current motor and is responsible for receiving the speed modulation of the frequency converter and driving the automatic calibration table 10 to operate so as to realize the displacement process. The inverse limit switch sensor 18 and the positive limit switch sensor 19 are limit sensors of the automatic calibration table 10, and are electrically connected to the controller 40.
Specifically, referring to fig. 1, the automatic calibration table 10 includes a frame 11 and a slide seat, two slide rails 12 are installed in the frame 11, the slide seat is slidably installed on the two slide rails 12, a screw 16 is installed on the slide seat in a threaded connection and in a matched manner, one end of the screw 16 extends out of the frame 11, a motor 17 is installed on the frame 11 at one end extending out of the screw 16, an output shaft of the motor 17 is in transmission connection with the screw 16, and a displacement sensor 20 for testing is installed between the frame 11 and the slide seat and in the axial direction of the screw 16; the anti-limit switch sensor 18 and the positive limit switch sensor 19 are respectively installed on the frame 11 and are used for detecting the position of the sliding seat. By the structure, the motor 17 drives the sliding seat to reciprocate and guide.
Further, the sliding seat comprises a driving plate 13 and a traction plate 14, the driving plate 13 and the traction plate 14 are fixedly connected through a connecting piece 15, a screw rod 16 is in threaded connection with the driving plate 13, the traction plate 14 and the sliding seat are in threaded connection, and a displacement sensor 20 for testing is arranged in the axis direction of the screw rod 16; the anti-limit switch sensor 18 is used for detecting the position of the driving plate 13, and the positive limit switch sensor 19 is used for detecting the position of the traction plate 14. With the above configuration, the displacement sensor 20 used for the test can be coaxial with the screw 16, and the stability of the test apparatus can be improved.
Embodiment two:
referring to fig. 1-5, the control method of the test device for testing the performance of the displacement sensor comprises the following steps:
1. 1 set of the automatic calibration device is provided with 10 frequency converters and an automatic calibration table 10 (10 sets are calibrated at the same time as an example), and the forward rotation time T1, the reverse rotation time T2, the rest time T3 of the motor and parameters of each frequency converter (T1 and T2 are determined by the measuring range of the sensor, the target calibration range and the dynamic calibration frequency) are written in the PLC through a PC program.
2. The 10 measured displacement sensors 20 are respectively marked (wherein, the number of the vibrating wire is ZX-W-B-1 to ZX-W-B-5, the number of the vibrating wire is CZ-W-B-1 to CZ-W-B-5) respectively, the 10 measured displacement sensors 20 are sequentially fixed on 10 automatic calibration tables 10, the 10 displacement sensors are initially in a free state, after the completion, the screw 16 on the automatic calibration tables is rotated to ensure that the 10 displacement sensors are positioned between the respective positive limit switch sensor and the respective negative limit switch sensor, and all the measured displacement sensors 20 are connected into a data automatic acquisition system, the automatic acquisition frequency is 1 min/time, and the acquisition period is 12h.
Specifically, the automatic acquisition system comprises a digital quantity collector and an upper computer, and adopts the prior art, such as a digital quantity data acquisition system of Shanghai and WU Internet of things systems limited company.
The inverse limit switch sensor 18 and the positive limit switch sensor 19 adopt magnetic proximity switches.
3. And starting a power control switch to debug and set, determining whether the set parameters of the frequency converter, the motor forward rotation time T1, the motor reverse rotation time T2 and the motor keeping static time T3 are consistent with expected effects, and if the parameters are inconsistent, further utilizing a PLC or the frequency converter to adjust.
4. After the debugging is finished, the test device can enter an automatic operation state, firstly, the system carries out limit judgment, whether the system is at a limit position or not, if not, the motor rotates forwards for T1 time, and if so, the next step is carried out.
5. And keeping the static state for the duration of T3 according to the setting.
6. And (3) the PLC performs limit judgment again, whether the motor is in a forward rotation limit position or not, if not, the motor rotates forward for T1 time, and if so, the next step is carried out.
7. The motor is reversed for a period of time T2 as set.
8. And (4) keeping static according to the setting, then entering limit judgment, circulating to the step 4, and entering an automatic operation state from the equipment.
In the test process, the data acquisition frequency of ZX-W-B-1 to ZX-W-B-5 and CZ-W-B-1 to CZ-W-B-5 is 1 min/time. The acquisition period is 12h, the control displacement cyclic variation condition of the vibrating wire type seam meter is shown in table 1, and the control displacement cyclic variation condition of the differential resistance type seam meter is shown in table 2.
During the test, the system integrates about 7.5 ten thousand measurements. The variable load displacement of the ZX-W-B-1 measuring point (vibrating wire type seam meter NVJ-50) is shown in figure 6, and the variable load displacement of the CZ-W-B-1 measuring point (differential resistance type seam meter NZJ-25) is shown in figure 7. Compared with the traditional measuring method, the testing device and the control method provided by the invention are completely automatic in work, free from human participation, good in repeatability and high in accuracy of the provided displacement characteristic, and realize 24-hour continuous synchronous testing of dynamic displacement of a plurality of sensors.
Claims (4)
1. A test device for displacement sensor capability test, its characterized in that: the automatic calibration device comprises a plurality of automatic calibration tables (10), a frequency converter (30), a controller (40) and an information acquisition system (50), wherein the automatic calibration tables (10) are driven to run through a motor (17), the motor (17) is electrically connected with the frequency converter (30), the frequency converter (30) is electrically connected with the controller (40) to be controlled, a displacement sensor (20) for testing is arranged on the automatic calibration tables (10), and the displacement sensor (20) is electrically connected with the information acquisition system (50); an inverse limit switch sensor (18) and a positive limit switch sensor (19) for controlling the running state of the motor (17) are arranged on the automatic calibration table (10), and the inverse limit switch sensor (18) and the positive limit switch sensor (19) are electrically connected with the controller (40); the frequency converter (30), the controller (40) and the information acquisition system (50) are respectively connected with an adaptive power supply.
2. The test device for displacement sensor performance testing according to claim 1, wherein: the automatic calibration table (10) comprises a frame body (11) and a sliding seat, wherein two sliding rails (12) are arranged in the frame body (11), the sliding seat is arranged on the two sliding rails (12) in a sliding mode, a screw rod (16) is arranged on the sliding seat in a screwed connection mode, one end of the screw rod (16) extends out of the frame body (11), a motor (17) is arranged on one end, extending out of the screw rod (16), of the frame body (11), an output shaft of the motor (17) is in transmission connection with the screw rod (16), and a displacement sensor (20) for testing is arranged between the frame body (11) and the sliding seat and in the axial direction of the screw rod (16); the anti-limit switch sensor (18) and the positive limit switch sensor (19) are respectively arranged on the frame body (11) and used for detecting the position of the sliding seat.
3. The test device for displacement sensor performance testing according to claim 2, wherein: the sliding seat comprises a driving plate (13) and a traction plate (14), the driving plate (13) and the traction plate (14) are fixedly connected through a connecting piece (15), a screw rod (16) is in threaded connection with the driving plate (13), the traction plate (14) is in threaded connection with the sliding seat, and a displacement sensor (20) for testing is arranged in the axis direction of the screw rod (16); the anti-limit switch sensor (18) is used for detecting the position of the driving plate (13), and the positive limit switch sensor (19) is used for detecting the position of the traction plate (14).
4. A control method using the test device for displacement sensor performance test according to claim 3, characterized by comprising the steps of:
step 1: according to the calibration requirements and the calibration quantity of the displacement sensors (20), a plurality of automatic calibration tables (10) are configured, a motor (17) is respectively and electrically connected with a plurality of frequency converters (30), the frequency converters (30) are electrically connected with a controller (40), and an inverse limit switch sensor (18) and a positive limit switch sensor (19) on each automatic calibration table (10) are respectively and electrically connected with the controller (40); the method comprises the steps that a PC program is used for writing motor forward rotation time T1, motor reverse rotation time T2, motor keeping stationary time T3 and running parameters of all frequency converters into a controller (40);
step 2: sequentially fixing the detected displacement sensors (20) on the automatic calibration table (10), enabling the displacement sensors (20) to be in a free state, rotating a screw (16) on the automatic calibration table (10) after the installation and fixation are finished, enabling each displacement sensor (20) to be positioned between a corresponding anti-limit switch sensor (18) and a corresponding positive limit switch sensor (19), and enabling all the displacement sensors (20) to be connected to an information acquisition system (50);
step 3: the frequency converter (30), the controller (40) and the information acquisition system (50) are respectively connected with an adaptive power supply for debugging, whether the set parameters of the frequency converter, the motor forward rotation time T1, the motor reverse rotation time T2 and the motor keeping static time T3 are consistent with expected effects or not is determined, and if the parameters are inconsistent, the controller (40) or the frequency converter (30) can be used for adjusting and setting;
step 4: after the debugging is finished, starting a controller (40), enabling the automatic calibration platform (10) to enter an automatic operation state, firstly judging the position of the sliding seat through a reverse limit switch sensor (18) and a forward limit switch sensor (19), judging whether the sliding seat is at a limit position, if not, enabling the motor to rotate forwards for a period of T1, and if so, entering the next step;
step 5: according to the setting, keeping a static state of the T3 time length;
step 6: the controller (40) carries out limit judgment again, judges whether the sliding seat is at a forward rotation limit position or not, if not, the motor rotates forward for a period of T1, and if so, the next step is carried out;
step 7: according to the setting, the motor reversely rotates for a period of T2;
step 8: and (4) keeping static according to the setting, then entering a limit judgment, and circulating to a judgment Step in Step 4, and entering an automatic operation state from the equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311366887.1A CN117537755A (en) | 2023-10-20 | 2023-10-20 | Test device for performance test of displacement sensor and control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311366887.1A CN117537755A (en) | 2023-10-20 | 2023-10-20 | Test device for performance test of displacement sensor and control method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117537755A true CN117537755A (en) | 2024-02-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311366887.1A Pending CN117537755A (en) | 2023-10-20 | 2023-10-20 | Test device for performance test of displacement sensor and control method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117537755A (en) |
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2023
- 2023-10-20 CN CN202311366887.1A patent/CN117537755A/en active Pending
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