CN108759739B - Checking device and checking method thereof - Google Patents
Checking device and checking method thereof Download PDFInfo
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- CN108759739B CN108759739B CN201810301156.1A CN201810301156A CN108759739B CN 108759739 B CN108759739 B CN 108759739B CN 201810301156 A CN201810301156 A CN 201810301156A CN 108759739 B CN108759739 B CN 108759739B
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- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000006073 displacement reaction Methods 0.000 claims abstract description 69
- 238000001514 detection method Methods 0.000 claims abstract description 25
- 238000009434 installation Methods 0.000 claims abstract description 21
- 238000006243 chemical reaction Methods 0.000 claims description 32
- 238000012795 verification Methods 0.000 claims description 20
- 230000002159 abnormal effect Effects 0.000 claims description 5
- 230000000149 penetrating effect Effects 0.000 claims 1
- 239000000523 sample Substances 0.000 description 10
- 238000005286 illumination Methods 0.000 description 5
- 239000002826 coolant Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
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- 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
- G01B21/045—Correction of measurements
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- 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
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- 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
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- A Measuring Device Byusing Mechanical Method (AREA)
- Indication Of The Valve Opening Or Closing Status (AREA)
Abstract
The invention relates to a checking device and a checking method thereof. The calibration device comprises a fixed support, a distance measuring rod, a digital display meter and a driving piece. The fixed bolster includes installation department, intermediate part and fixed part, and the both ends of intermediate part are connected with installation department and fixed part respectively, and the mounting hole that is used for installing displacement sensor is seted up to the installation department. The distance measuring rod is movably arranged on the fixing part. The digital display meter is arranged on the fixed part and used for detecting the displacement of the distance measuring rod and displaying the detected displacement. The driving piece is arranged on the fixing portion and used for driving one end of the ranging rod so that the ranging rod is close to or far away from the displacement sensor. When the check device checks the valve position detection device, the digital display meter can display the displacement of the distance measuring rod, the reading is convenient, the check process is simple, and therefore the check efficiency can be improved.
Description
Technical Field
The invention relates to the technical field of checking equipment, in particular to a checking device and a checking method thereof.
Background
The safety valve of the nuclear power plant belongs to important equipment related to nuclear safety, and therefore a valve position detection device needs to be installed on the safety valve to represent the opening state of the safety valve. The valve position detection device is required to be periodically checked to ensure the measurement accuracy and the functional stability because the correctness indicated by the valve position detection device directly influences the monitoring and judgment of the unit state. The traditional calibration method uses a micrometer, the displacement of the safety valve rod needs to be repeatedly calculated in the calibration process, the operation is complex, the reading is difficult, the error is easy, and the calibration efficiency is low.
Disclosure of Invention
Therefore, it is necessary to provide a calibration apparatus and a calibration method thereof for solving the problem of low calibration efficiency of the conventional calibration method.
A verification device, comprising:
the fixed support comprises an installation part, a middle part and a fixed part, wherein two ends of the middle part are respectively connected with the installation part and the fixed part, and the installation part is provided with an installation hole for installing a displacement sensor;
the distance measuring rod is movably arranged on the fixing part;
the digital display meter is arranged on the fixed part and is used for detecting the displacement of the distance measuring rod and displaying the detected displacement; and
the driving piece is arranged on the fixing portion and used for driving the distance measuring rod to move so that the distance measuring rod is close to or far away from the displacement sensor.
In one embodiment, the driving member comprises a first driving member and a second driving member, the first driving member and the second driving member can respectively drive the distance measuring rod to move, and the movement speed of the first driving member driving the distance measuring rod is greater than the movement speed of the second driving member driving the distance measuring rod.
In one embodiment, the first driving member and the second driving member are screws, the first driving member is rotatably disposed in the fixing portion, the second driving member is rotatably disposed in the first driving member, and a pitch of the first driving member is greater than a pitch of the second driving member.
In one embodiment, the range finder further comprises an adjusting knob, wherein the adjusting knob is rotatably arranged on the fixing part, and rotation of the adjusting knob is used for selecting the first driving piece to drive the range finder rod to move or selecting the second driving piece to drive the range finder rod to move.
In one embodiment, a switch button is arranged on the digital display meter, an illuminating lamp is arranged in the digital display meter, the illuminating lamp is used for illuminating a display screen of the digital display meter, and the switch button is used for controlling the opening and closing of the illuminating lamp.
In one embodiment, a zero clearing button is arranged on the digital display meter, and the zero clearing button is used for defining the zero point of the digital display meter at different positions of the distance measuring rod.
In one embodiment, the displacement sensor further comprises a sleeve, the sleeve is used for being sleeved on the connecting portion of the displacement sensor, and the rest portion of the connecting portion of the displacement sensor penetrates through the mounting hole, so that the length of the displacement sensor extending into the mounting portion and the fixing portion is a fixed value.
A method of verifying a verification device as claimed in any preceding item, comprising the steps of:
mounting the displacement sensor on the fixed support through the mounting hole;
adjusting the distance between the distance measuring rod and the displacement sensor so that the value of the output signal of the conversion plate is a first value, and recording the position of the distance measuring rod as a first position;
moving the distance measuring rod by a preset distance, enabling the numerical value of the signal output by the conversion plate to be a second numerical value, and recording the position of the distance measuring rod as a second position;
moving the distance measuring rod between the first position and the second position, and recording the position of the distance measuring rod as a third position;
calculating a theoretical numerical value of the output signal of the conversion plate when the distance measuring rod is positioned at the third position, and verifying whether the numerical value of the output signal of the conversion plate is equal to the theoretical numerical value or not;
if so, the valve position detection device is normal, and if not, the valve position detection device is abnormal.
In one embodiment, if the valve position detection device is abnormal, the range potentiometer on the conversion plate is adjusted to enable the value of the output signal of the rotating plate to be equal to the theoretical value, so that the valve position detection device is corrected.
In one embodiment, the step of calibrating the valve position detecting device further comprises:
moving the distance measuring rod to the first position to verify whether the value of the output signal of the conversion plate is equal to a first value;
if yes, the valve position detection device corrects correctly, and if not, the valve position detection device corrects incorrectly.
The checking device and the checking method thereof at least have the following advantages:
the mounting hole has been seted up to the installation department of fixed bolster, and displacement sensor passes through the mounting hole to be installed on the fixed bolster, and displacement sensor's mounting means is unanimous with the scene installation, guarantees that the check-up satisfies on-the-spot requirement. The calibration device is provided with the digital display meter which can display the displacement of the distance measuring rod, the reading is convenient, the operation is simple, the error is not easy to occur, and the calibration efficiency can be improved. When the check device checks the valve position detection device, the check device is easy to operate, the check process is simple, and therefore the check efficiency can be improved. The checking device has simple structure, small volume and convenient carrying.
Drawings
FIG. 1 is a schematic structural diagram of a valve position detecting apparatus according to an embodiment;
FIG. 2 is a schematic diagram of a calibration device according to an embodiment;
FIG. 3 is a schematic view of the valve position sensing device mounted to the verification device;
FIG. 4 is a flow chart of a verification method in one embodiment.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, but rather should be construed as broadly as the present invention is capable of modification in various respects, all without departing from the spirit and scope of the present invention.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
Referring to fig. 1, a valve position detecting device 10 is illustrated in an embodiment. The valve position detecting device 10 includes a displacement sensor 12, a metal gasket 14, a cable 16, and a switching plate 18. The displacement sensor 12 includes a body 121, a connecting portion 123, and a probe 125. The connecting portion 123 is connected to the body 121, and the probe 125 is disposed on the connecting portion 123. The connection portion 123 is provided with a screw thread to facilitate the installation of the displacement sensor 12. The cable 16 electrically connects the main body 121 of the displacement sensor 12 with the conversion plate 18, and the metal packing is used to seal the gap between the cable 16 and the main body 121.
The probe 125 may detect a position of the safety valve spool, and the body 121 may generate a valve position signal according to the detected position of the safety valve spool. The cable 16 transmits the valve position signal to the conversion plate 18, and the conversion plate 18 can convert the valve position signal into an output signal and transmit the output signal to a main control for display. In one embodiment, the transfer plate 18 converts the valve position signal to a current signal that varies from 4mA to 20 mA. When the safety valve is fully opened, the valve core of the safety valve is closest to the probe rod 125 of the displacement sensor 12, and the current output by the conversion plate 18 is 4 mA. When the safety valve is gradually closed, the distance between the valve core of the safety valve and the probe rod 125 gradually increases, and the current output by the conversion plate 18 gradually increases. When the safety valve is fully closed, the changeover panel 18 outputs a current of 20 mA.
Referring to fig. 2 and 3, a verification device 20 in one embodiment is used for verifying whether the measurement of the valve position detection device 10 is correct. Specifically, the calibration device 20 includes a fixing bracket 100, a distance measuring rod 200, a digital display 300 and a driving member 400.
The mounting bracket 100 is used to carry other components of the verification device 20. The fixing bracket 100 includes a mounting portion 110, an intermediate portion 120, and a fixing portion 130. Both ends of the intermediate portion 120 are connected to the mounting portion 110 and the fixing portion 130, respectively. In one embodiment, the fixing bracket 100 is U-shaped, and the mounting portion 110 and the fixing portion 130 are spaced apart from each other and arranged in parallel, so that the user can conveniently hold the fixing bracket by hand. The mounting portion 110 has a mounting hole 112, and the connecting portion 123 of the displacement sensor 12 can be inserted into the mounting hole 112, so that the displacement sensor 12 is mounted on the mounting portion 110. When the displacement sensor 12 is mounted on the mounting portion 110, the probe 125 of the displacement sensor 12 is located between the mounting portion 110 and the fixing portion 130.
In one embodiment, the mounting hole 112 has a side wall provided with female threads, and the connection portion 123 of the displacement sensor 12 is screwed into the mounting hole 112, thereby providing the displacement sensor 12 to the mounting portion 110. After the displacement sensor 12 is screwed to the bottom, it is shown installed in place. The installation mode of the displacement sensor 12 is completely consistent with the field installation mode, so that the accuracy of the verification is ensured.
In one embodiment, the verification device 20 further includes a sleeve 500. The safety valve of the nuclear power plant includes a safety valve on a pressurizer for a loop coolant and a safety valve in a residual heat removal system, and since the safety valves have different kinds, it is necessary to use different models of displacement sensors 12, and the lengths of the connection parts 123 of the displacement sensors 12 of the various models are different. When the displacement sensor 12 is installed, the sleeves 500 with different lengths can be selected according to different types of displacement sensors 12. The sleeve 500 is firstly sleeved on the connecting portion 123 of the displacement sensor 12, and then the remaining portion of the connecting portion 123 is screwed into the mounting hole 112, so that the length of the displacement sensor 12 extending between the mounting portion 110 and the fixing portion 130 is a fixed value, and the probe rod of the displacement sensor 12 is completely located between the mounting portion 110 and the fixing portion 130. In one embodiment, the sleeve 500 has an inner diameter greater than the diameter of the connection 125, which may facilitate installation of the sleeve 500.
The distance measuring rod 200 is movably disposed on the fixing portion 130, and the movement of the distance measuring rod 200 may simulate the movement of a spool of the safety valve. In one embodiment, the fixing portion 130 is formed with a guide hole (not shown), and the distance measuring rod 200 is slidably disposed in the guide hole. The guiding hole and the mounting hole 112 are coaxially arranged, so that the axis of the distance measuring rod 200 coincides with the axis of the probe 125 of the displacement sensor 12, and the distance measuring rod 200 and the probe 125 of the displacement sensor 12 are located at the same height.
The digital display meter 300 is disposed on the fixing part 130, and the digital display meter 300 detects the displacement of the distance measuring bar 200 and displays the detected displacement. In one embodiment, an illuminating lamp (not shown) is disposed in the digital display meter 300, and the illuminating lamp is used for illuminating the display screen of the digital display meter 300, so as to facilitate reading in a dark work place. In one embodiment, the digital display meter 300 is provided with a switch button 310. The switch button 310 is used for controlling the digital display meter 300 to be turned on and off. The switch buttons 310 may also be used to control the turning on and off of the illumination lamps.
Specifically, when the switch button 310 is pressed for the first time, the digital display meter 300 is turned on, but in the energy saving mode at this time, the illumination lamp is not turned on. When the switch button 310 is pressed a second time, the illumination lamp is turned on, and the illumination lamp can illuminate the display screen, so that the reading can be performed in a dim working place. When the switch button 310 is pressed for the third time, the digital display table 300 and the illumination lamp are both turned off.
In an embodiment, the digital display meter 300 is further provided with a clear button 320, and the clear button 320 is used for defining a zero point of the digital display meter 300 when the distance measuring rod 200 is at different positions, so that the digital display meter 300 can conveniently read the displacement of the distance measuring rod 200 in each movement, and the verification is convenient.
The driving member 400 is disposed on the fixing portion 130, and the driving member 400 is used for driving the distance measuring rod 200 to move, so that the distance measuring rod 200 approaches or leaves the displacement sensor 12. In one embodiment, the driving member 400 includes a first driving member 410 and a second driving member 420, the first driving member 410 and the second driving member 420 can respectively drive the distance measuring rod 200 to move, and the speed of the first driving member 410 driving the distance measuring rod 200 is greater than the speed of the second driving member 420 driving the distance measuring rod 200. The first driving member 410 and the second driving member 420 drive the distance measuring rod 200 to move at different speeds, so that the position of the distance measuring rod 200 can be adjusted quickly and precisely.
Specifically, the first driving member 410 and the second driving member 420 are both screws. One end of the first driving member 410 is rotatably disposed in the fixing portion 130. The diameter of the first driving member 410 is larger than that of the second driving member 420, and one end of the second driving member 420 is rotatably disposed in the first driving member 410. The rotation of the first driving member 410 can drive the movement of the distance measuring bar 200, and the rotation of the second driving member 420 can also drive the movement of the distance measuring bar 200. Moreover, the thread pitch of the first driving element 410 is greater than that of the second driving element 420, and the distance that the distance measuring rod 200 is driven to move by one rotation of the first driving element 410 is greater than that of the distance measuring rod 200 driven to move by one rotation of the second driving element 420, so that the movement speed that the distance measuring rod 200 is driven by the first driving element 410 is greater than that of the distance measuring rod 200 driven by the second driving element 420.
In one embodiment, the calibration device 20 further includes an adjusting knob 600, and the adjusting knob 600 is rotatably disposed on the fixing portion 130. The rotation of the adjustment knob 600 is used to select the first driving member 410 to drive the distance measuring bar 200 to move or select the second driving member 420 to drive the distance measuring bar 200 to move. When the adjusting knob 600 selects the first driving member 410 to drive the distance measuring rod 200 to move, the first driving member 410 is connected to the distance measuring rod 200, and the distance measuring rod 200 can be rapidly driven to move by rotating the first driving member 410. When the adjusting knob 600 selects the second driving member 420 to drive the distance measuring rod 200 to move, the second driving member 420 is connected to the distance measuring rod 200, and the distance measuring rod 200 can be driven to move relatively slowly by rotating the second driving member 420, so as to finely adjust the distance between the distance measuring rod 200 and the displacement sensor 12. The adjusting knob 600 can prevent the first driving member 410 and the second driving member 420 from interfering with each other when driving the distance measuring rod 200 to move, thereby causing deviation and affecting the checking result.
Referring to fig. 4, the present invention further provides a verification method. To implement this verification method, the verification apparatus 20 described above is used. The checking method specifically comprises the following steps:
step S110: the displacement sensor 12 is mounted to the fixing bracket 100 through the mounting hole 112.
Specifically, different lengths of the sleeve 500 are selected depending on the type of sensor. The sleeve 500 is fitted over the connection portion 123 of the displacement sensor 12, and then the remaining portion of the connection portion 123 of the displacement sensor 12 is screwed into the mounting hole 112, so that the displacement sensor 12 is mounted on the fixing bracket 100. The conversion plate 18 is then loaded into the cabinet 30.
Step S120: the distance between the distance measuring rod 200 and the displacement sensor 12 is adjusted so that the value of the output signal of the converting plate 18 is the first value, and the position of the distance measuring rod 200 is recorded as the first position.
Specifically, the probe 125 of the displacement sensor 12 may detect the position information of the distance measuring bar 200, and the conversion plate 18 outputs an output signal corresponding to the position information. When the digital display meter 300 is turned on, the distance measuring rod 200 is driven to move by the driving part 400, and the output signal of the conversion plate 18 is changed accordingly. During the movement of the distance measuring bar 200, when the value of the output signal of the converting plate 18 is the first value, the movement of the distance measuring bar 200 is stopped, and at this time, the position of the distance measuring bar 200 is recorded as the first position. In one embodiment, the output signal of the conversion plate 18 is a current signal, and the first value is 4 mA.
Step S130: the distance measuring bar 200 is moved by a predetermined distance, so that the value of the output signal of the converting plate 18 is the second value, and the position of the distance measuring bar 200 is recorded as the second position.
Specifically, the clear button 320 is pressed on the digital display table 300 so that the displayed numerical value of the digital display table 300 is zero. And then moves the distance measuring pole 200 by a preset distance. After the distance measuring stick 200 moves the preset distance, the position of the distance measuring stick 200 is recorded as the second position. The span potentiometer of the conversion plate 18 is adjusted so that the value of the output signal of the conversion plate 18 is the second value.
In one embodiment, the predetermined distance is a range distance of the safety valve. The range distance of a safety valve on a pressure stabilizer of the loop coolant is 5.8mm, and the range distance of the safety valve in the waste heat discharge system is 2.21 mm. The output signal of the conversion plate 18 is a current signal, and the second value is 20 mA.
Step S140: the distance measuring bar 200 is moved between the first position and the second position, and the position of the distance measuring bar 200 is recorded as a third position.
Specifically, the clear button 320 is pressed on the digital display table 300 to make the display of the digital display table 300 zero. The driving member 400 then drives the distance measuring bar 200 to move between the first position and the third position. Note down the position of the distance measuring bar 200 at this time as the third position, and note down the value of the output signal of the changeover panel 18 at this time.
Step S150: and calculating the theoretical value of the output signal of the conversion plate 18 when the distance measuring bar 200 is located at the third position, and verifying whether the value of the output signal of the conversion plate 18 is equal to the theoretical value.
Specifically, the formula for calculating the theoretical value of the output signal of the conversion plate 18 when the distance measuring bar 200 is located at the third position is specifically as follows: x is (a + b) × c/d, where X is a theoretical value of the output signal of the converting plate 18 when the distance measuring bar 200 is located at the third position, a is a first value, b is a second value, c is a distance between the third position and the first position, and d is a predetermined distance. In one embodiment, the third position is located midway between the first and second positions, and the theoretical amount is 12 mA.
When the distance measuring lever 200 is located at the third position, if the value of the output signal of the switching plate 18 is the same as the theoretical value, it indicates that the valve position detecting device 10 is normal. If the value of the output signal of the changeover panel 18 is different from the theoretical value, it indicates that the valve position detection device 10 is abnormal. At this time, the span potentiometer on the conversion plate 18 needs to be adjusted so that the value of the output signal of the rotation plate is equal to the theoretical value, so that the valve position detection device 10 can be calibrated.
In one embodiment, after calibrating the valve position detecting device 10, the valve position detecting device 10 needs to be further verified to ensure that the valve position detecting device 10 is correctly calibrated. Specifically, the distance measuring bar 200 is moved to the first position, and it is verified whether the value of the output signal of the conversion plate 18 is equal to the first value. If yes, it indicates that the valve position detection device 10 is correctly corrected, and if no, it indicates that the valve position detection device 10 corrects the error. If the valve position detection device 10 corrects the error, the span potentiometer on the conversion plate 18 needs to be adjusted again to make the value of the output signal of the conversion plate 18 equal to the first value, and the valve position detection device 10 needs to be corrected again.
The verification device 20 and the verification method thereof have at least the following advantages:
the displacement sensor 12 is installed on the fixed support 100 through the installation hole 112, and the installation mode of the displacement sensor 12 is consistent with the actual installation on site, so that the verification is ensured to meet the requirements on site. The calibration device 20 is provided with the digital display meter 300, the digital display meter 300 can display the displacement of the distance measuring rod 200, the reading is convenient, the operation is simple, and the calibration efficiency can be improved. The digital display meter 300 is provided with a zero clearing button 320, so that the zero point of the digital display meter 300 can be positioned when the distance measuring rod 200 is at different positions, and the calibration and reading are convenient. The illuminating lamp can ensure that the digital display meter 300 can read in a dim working place.
The driving member 400 includes a first driving member 410 and a second driving member 420, so that the position of the distance measuring stick 200 can be adjusted quickly and precisely. The sleeve 500 can be adapted to displacement sensors 12 of different specifications, so that the length of the displacement sensor 12 extending between the mounting portion 110 and the fixing portion 130 is a fixed value, and the calibration accuracy is ensured. When the check device 20 is used for checking the valve position detection device 10, the checking process is simple, and the checking efficiency can be improved. The checking device 20 is simple in structure, small in size and convenient to carry.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (9)
1. A verification apparatus, comprising:
the fixed support comprises an installation part, a middle part and a fixed part, wherein two ends of the middle part are respectively connected with the installation part and the fixed part, and the installation part is provided with an installation hole for installing a displacement sensor;
the distance measuring rod is movably arranged on the fixing part;
the digital display meter is arranged on the fixed part and is used for detecting the displacement of the distance measuring rod and displaying the detected displacement;
the driving piece is arranged on the fixing part and used for driving the distance measuring rod to move so as to enable the distance measuring rod to be close to or far away from the displacement sensor; and
the sleeves with different lengths are used for being sleeved on the connecting part of the displacement sensor, and the rest part of the connecting part of the displacement sensor is arranged in the mounting hole in a penetrating manner; the sleeves with different lengths can be matched with the displacement sensors with different models, so that the length of the displacement sensor extending between the mounting part and the fixing part is a fixed value; the inner diameter of the sleeve is larger than the diameter of the connecting part so as to facilitate the installation of the sleeve.
2. The calibration device as claimed in claim 1, wherein the driving member comprises a first driving member and a second driving member, the first driving member and the second driving member are capable of driving the distance measuring bar to move respectively, and the speed of the first driving member driving the distance measuring bar is greater than the speed of the second driving member driving the distance measuring bar.
3. The verification device of claim 2, wherein the first driving member and the second driving member are threaded rods, the first driving member is rotatably disposed in the fixing portion, the second driving member is rotatably disposed in the first driving member, and a pitch of the first driving member is greater than a pitch of the second driving member.
4. The calibration device of claim 2, further comprising an adjustment knob rotatably disposed on the fixing portion, wherein rotation of the adjustment knob is used to select the first driving member to drive the distance measuring bar or select the second driving member to drive the distance measuring bar.
5. The calibration device according to claim 1, wherein a switch button is arranged on the digital display meter, an illuminating lamp is arranged in the digital display meter, the illuminating lamp is used for illuminating a display screen of the digital display meter, and the switch button is used for controlling the opening and closing of the illuminating lamp.
6. The checking device according to claim 1, wherein a zero clearing button is arranged on the digital display meter, and the zero clearing button is used for defining a zero point of the digital display meter when the distance measuring rod is at different positions.
7. A verification method of a verification device according to any one of claims 1 to 6, comprising the steps of:
mounting displacement sensors on a fixed support through mounting holes, wherein the displacement sensors of different types can be matched with sleeves of different lengths, so that the length of the displacement sensors extending between the mounting part and the fixed part is a fixed value;
adjusting the distance between the distance measuring rod and the displacement sensor so that the value of the output signal of the conversion plate is a first value, and recording the position of the distance measuring rod as a first position;
moving the distance measuring rod by a preset distance, enabling the numerical value of the signal output by the conversion plate to be a second numerical value, and recording the position of the distance measuring rod as a second position;
moving the distance measuring rod between the first position and the second position, and recording the position of the distance measuring rod as a third position;
calculating a theoretical numerical value of the output signal of the conversion plate when the distance measuring rod is positioned at the third position, and verifying whether the numerical value of the output signal of the conversion plate is equal to the theoretical numerical value or not;
if so, the valve position detection device is normal, and if not, the valve position detection device is abnormal.
8. The calibration method of claim 7, wherein if said valve position detection device is abnormal, adjusting a span potentiometer on said conversion plate to make a value of an output signal of said conversion plate equal to said theoretical value, thereby calibrating said valve position detection device.
9. The verification method of claim 8, wherein the step of calibrating the valve position sensing device is further followed by:
moving the distance measuring rod to the first position to verify whether the value of the output signal of the conversion plate is equal to a first value;
if yes, the valve position detection device corrects correctly, and if not, the valve position detection device corrects incorrectly.
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| CN201810301156.1A CN108759739B (en) | 2018-04-04 | 2018-04-04 | Checking device and checking method thereof |
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| CN201810301156.1A CN108759739B (en) | 2018-04-04 | 2018-04-04 | Checking device and checking method thereof |
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| CN109506563B (en) * | 2018-11-07 | 2024-02-27 | 上海工业自动化仪表研究院有限公司 | Slewing bearing radial clearance and tooth surface runout detection device and method |
| CN112012439B (en) * | 2020-08-12 | 2022-01-14 | 广东博智林机器人有限公司 | Plastering device and plastering equipment with same |
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