CN105043232A - Device and method for calibrating dragged LVDT displacement sensor - Google Patents
Device and method for calibrating dragged LVDT displacement sensor Download PDFInfo
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- CN105043232A CN105043232A CN201510349722.2A CN201510349722A CN105043232A CN 105043232 A CN105043232 A CN 105043232A CN 201510349722 A CN201510349722 A CN 201510349722A CN 105043232 A CN105043232 A CN 105043232A
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Abstract
The invention discloses a device and method for calibrating a dragged LVDT displacement sensor. A top cover is installed on one end of a housing. A clamping head is installed on the other end of the housing. A sliding column is located inside the housing. A dial indicator passes through the top cover. The side head of the dial indicator is connected with the siding column. An adjusting screw passes through the top cover to be connected with one end of the siding column. A chute is disposed on the outer side of the siding column. A stop screw passes through the housing to be installed in the chute on the siding column. The adjusting screw rotates to drive the siding column to move left and right. The left-right movement of the siding column drives the stop screw to move in the chute. A sensor core is installed on the connector of the siding column. The siding column drives the sensor core to move. The sensor core is located in the clamping head. A lining sleeves the sensor core. A sensor body is installed between the lining and the clamping head. The lining is extracted and the adjusting screw is rotated in order that the sensor core moves left and right. Thus, the sensor is calibrated. The device is light, simple in method, high in reliability, good in environment adaptability, and easy to use.
Description
Technical field
The invention belongs to pick up calibration field, particularly relate to and utilize mechanical method to carry out calibrating, a kind of drawing type LVDT calibrating device for displacement sensor and method.
Background technology
LVDT (LinearVariableDifferentialTransformer, linear variable difference transformer) displacement transducer belongs to linear displacement transducer.Have that unlimited mechanical life, unlimited resolution, repeatability and stability are high, sturdy and durable, the advantage such as the strong and input and output isolation of environmental suitability, the national economy all trades and professions such as space flight and aviation, machinery, building, weaving, railway, coal, metallurgy, plastics, chemical industry and research institutions are widely used in, be used to measure and extend, vibration, object thickness, the high-tech product of expansion etc.LVDT displacement transducer principle of work is briefly the movable transformer of iron core.During drawing type LVDT displacement transducer practical application, tested works is connected with iron core, when tested works moves, is calculated the displacement of iron core and tested works by testing sensor output voltage.
LVDT displacement transducer, before dispatching from the factory or using, can carry out demarcating through the mechanism of specialty and calibrate, set up the constrained input characteristic relation of sensor.In use, before formal displacement measurement, usually can the whole test macro comprising sensor and collector be debugged, carry out reliability and the stability of certainty annuity zero-bit and the system of investigation; In addition, in sensor use procedure, or the change of temperature As time goes on, sensor characteristic may change, produce the phenomenons such as zero point drift, the accuracy that impact is measured, this will ask and calibrate to determine its availability to sensor fast, but be inconvenient to bring back laboratory environment under many circumstances and carry out testing calibration, and laboratory equipment is also very heavy cannot take testing ground.Under test or commercial Application field condition, fast, facilitate, accurately for sensor provides displacement most important.The present invention is based on above demand to propose, invent portable mechanical drawing type LVDT calibrating device for displacement sensor and using method thereof.
Summary of the invention
The object of this invention is to provide one fast, conveniently, accurately, a kind of drawing type LVDT calibrating device for displacement sensor.Object of the present invention also comprises to be provided a kind of and utilizes mechanical method to carry out calibrating, a kind of drawing type LVDT displacement transducer calibration steps.
A kind of drawing type LVDT calibrating device for displacement sensor, comprises dial gauge 1, adjustment screw 2, top cover 3, shell 4, traveller 5, stop screw 6 and chuck 7;
Top cover 3 is arranged on shell 4 one end, chuck 7 is arranged on shell 4 other end, traveller 5 is positioned at enclosure, dial gauge 1 is through top cover 3, and dial gauge 1 side head is connected with traveller 5, and adjustment screw 2 is connected with traveller 5 one end through top cover 3, chute is had outside traveller 5, stop screw 6 is arranged in the chute of traveller 5 through shell 4, and screw 2 rotates and drives traveller 5 to move left and right, and traveller 5 moves left and right and drives stop screw 6 to move in chute.
A kind of drawing type LVDT of the present invention calibrating device for displacement sensor, can also comprise:
Copper billet 15 and the 3rd screw 16, dial gauge 1 is fixed on top cover by the 3rd screw 16, between dial gauge 1 the 3rd screw 16, be provided with copper billet 15.
A kind of drawing type LVDT displacement transducer calibration steps, comprises following step,
Step one: be arranged on by sensor iron core 11 on traveller 5 connector, traveller 5 is with dynamic sensor iron core 11 to move, it is inner that sensor iron core 11 is positioned at chuck 7, and outside sensor iron core 11, cover has lining 13, and sensor body 12 is arranged between lining 13 and chuck 7;
Step 2: lining 13 is extracted out, rotating adjustment screw 2 makes sensor iron core 11 move left and right, the moving direction of dial gauge 1 is identical with shift value with the moving direction of sensor iron core 11 with shift value, by dial gauge 1 pickup displacement, calibrates sensor.
Beneficial effect
Utilize the present invention can effectively solve drawing type LVDT displacement transducer test or commercial Application scene calibration and debugging a difficult problem, can calibrate fast, accurately, easily and debug LVDT displacement transducer, there is the features such as device is light, method is simple, reliability is high, environmental adaptation is strong, easy to use.
Accompanying drawing explanation
The front view of Fig. 1 drawing type LVDT calibrating device for displacement sensor;
The right view of Fig. 2 drawing type LVDT calibrating device for displacement sensor figure;
The vertical view of Fig. 3 drawing type LVDT calibrating device for displacement sensor figure.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further details.
The present invention by the specific mechanism of design, make the direction of described sensor iron core and the movement of dial gauge gauge head and shift value identical, sensor iron core displacement is read by dial gauge.Described calibrating installation is primarily of dial gauge or the part composition such as the higher clock gauge of precision, adjustment screw, top cover, overcoat, traveller, stop screw, chuck, screw, packing ring and lining, and device adopts non-magnetic stainless steel material to make.After assembling as illustrated in the accompanying drawings from 1 to 3.
The object of the present invention is achieved like this: as shown in Figure 1, first, the calibrating installation chuck 7 of non-sensor installation is screwed down, LVDT displacement transducer moving iron core 11 is arranged on traveller 5 connector by screw thread, lining 13 is enclosed within iron core and traveller connector, calibrating installation chuck 7 is tightened by screw thread and shell 4 through lining; Secondly, by LVDT displacement transducer body 12 through lining, insert calibrating installation tail end chuck 7, make iron core substantially at sensor body center, utilize screw 8 by the sensor body locking in chuck 7, extract lining out; Then, turn adjustment screw 2, traveller 5 can be driven to move left and right when adjustment screw turns, traveller one end contacts with dial gauge 1 gauge head, other end band dynamic sensor iron core moves, the direction of iron core movement is identical with the direction of dial gauge 1 gauge head movement and shift value, and displacement is read by dial gauge; Finally, design several grades of calibration displacements according to transducer range, record is calibrated the corresponding output quantity electric signal of sensor, and compares with input quantity dial gauge shift value, makes calibration chart.
Consult shown in Fig. 1-3, the drawing type LVDT calibrating device for displacement sensor installation method in the present invention is as follows:
All for calibrating installation parts are ready to, traveller 5 is penetrated in shell 4, then stroke limit screw 6 is threaded connection through shell and traveller; Adjustment screw 2 is connected with traveller 5 by screw thread through top cover 3, rotating adjustment screw 2 makes stroke limit screw 6 at its chute center, utilize screw 214 be connected with shell 4 by top cover 3 and fix, the effect of stroke limit screw 6 is the stroke of restriction traveller 5 and the position of instruction traveller 5; By dial gauge (or clock gauge) 1 through top cover 3, dial gauge 1 gauge head withstands on traveller, compression dial gauge 1 stroke is to the half of its range, utilizing screw 316 to be held out against by dial gauge 1 is fixed on top cover, and adding copper billet 15 object above at screw 316 is prevent from screw 316 from tightening in rotation process to cause damage to dial gauge; Connected by screw thread and shell by chuck 7, calibrating installation has been assembled.
The method utilizing the present invention to calibrate drawing type LVDT displacement transducer is as follows:
1. assemble drawing type LVDT calibrating device for displacement sensor
According to above-mentioned drawing type LVDT calibrating device for displacement sensor installation method, calibrating installation is assembled into position.
2. on calibrating installation, install drawing type LVDT displacement transducer
Consult Fig. 1, first, calibrating installation chuck 7 is screwed down, LVDT displacement transducer iron core 11 is arranged on traveller 5 connector by screw thread, lining 13 is enclosed within iron core and traveller connector, calibrating installation chuck 7 is tightened by screw thread and overcoat 4 through lining; Secondly, by LVDT displacement transducer body 12 through lining, insert calibrating installation tail end chuck 7, make iron core substantially at sensor body center, utilize screw 8 by the sensor body locking in chuck 7, extract lining out, the effect of lining ensures the spacing between iron core and sensor body; Finally, rotate adjustment screw 2, check that traveller 5 moves and whether normal dial gauge 1 rotates.
3. pair drawing type LVDT displacement transducer is calibrated
Calibrated sensor is connected with corresponding data acquisition device system, determines that data acquisition starts calibration after normal.Consult Fig. 1, rotate clockwise adjustment screw 2 iron cores 11 and move right, rotate counterclockwise adjustment screw then iron core be moved to the left.Moving left and right iron core makes sensor output quantity in zero-bit, records dial gauge 1 reading simultaneously, using this reading of dial gauge as input quantity zero point.Design several grades of input displacements according to transducer range, move left and right iron core, make dial gauge reading reach the requirement of input displacement, record sensor output quantity (electric signal) simultaneously.
4. make calibration chart
Gather and data involved in record calibration process, by corresponding for calibrating sensors output quantity (electric signal), compare with input quantity (dial gauge shift value), make calibration chart.
In sum, the present invention utilizes calibrating installation to adopt mechanical type method to calibrate for drawing type LVDT displacement transducer and debugging provides displacement accurately, tested sensor is installed on the calibrating installation made by non-magnetic stainless steel material, turn adjustment screw belt dynamic sensor iron core and dial gauge (or clock gauge) gauge head move by identical direction simultaneously, dial gauge pickup is utilized to test displacement, record is calibrated the corresponding output quantity of sensor (electric signal), and compare with input quantity (dial gauge shift value), make calibration chart.
Traveller 5 one end contacts with dial gauge 1 gauge head, and the other end is connected with sensor iron core 11, and turn adjustment screw 2 and traveller 5 can be driven to move, the shift value of sensor iron core 11 movement reads by dial gauge 1.
Stroke limit screw 6 is used for limiting the stroke of traveller 5 and the position of instruction traveller 5, and be threaded connection through shell and traveller by stroke limit screw 6, the initial position of stroke limit screw 6 is at its chute center.
When dial gauge 1 is installed, dial gauge 1 gauge head is withstood on traveller, compression dial gauge 1 stroke, to the half of its range, utilizes screw 316 to be held out against by dial gauge 1 and is fixed on top cover, add copper billet 15 above prevent screw 316 from tightening the damage that may cause dial gauge in rotation process at screw 316.
Movable sensor iron core 11 makes sensor output quantity in zero-bit, record dial gauge 1 reading simultaneously, using this reading of dial gauge as input quantity zero point, several grades of input displacements are designed according to transducer range, movable sensor iron core 11, make dial gauge reading reach the requirement of input displacement, record sensor output quantity (electric signal) simultaneously, make calibration chart.
Claims (3)
1. a drawing type LVDT calibrating device for displacement sensor, is characterized in that: comprise dial gauge (1), adjust screw (2),
Top cover (3), shell (4), traveller (5), stop screw (6) and chuck (7);
Top cover (3) is arranged on shell (4) one end, chuck (7) is arranged on shell (4) other end, traveller (5) is positioned at enclosure, dial gauge (1) is through top cover (3), dial gauge (1) side head is connected with traveller (5), adjustment screw (2) is connected with traveller (5) one end through top cover (3), traveller (5) outside has chute, stop screw (6) is arranged in the chute of traveller (5) through shell (4), screw (2) rotates and drives traveller (5) to move left and right, traveller (5) moves left and right and drives stop screw (6) to move in chute.
2. a kind of drawing type LVDT calibrating device for displacement sensor according to claim 1, it is characterized in that: also comprise copper billet (15) and the 3rd screw (16), dial gauge (1) is fixed on top cover by the 3rd screw (16), is provided with copper billet (15) between dial gauge (1) the 3rd screw (16).
3., based on the calibration steps of a kind of drawing type LVDT calibrating device for displacement sensor according to claim 1, it is characterized in that: comprise following step,
Step one: sensor iron core (11) is arranged on traveller (5) connector, traveller (5) band dynamic sensor iron core (11) is mobile, it is inner that sensor iron core (11) is positioned at chuck (7), sensor iron core (11) outside cover has lining (13), and sensor body (12) is arranged between lining (13) and chuck (7);
Step 2: lining (13) is extracted out, rotating adjustment screw (2) makes sensor iron core (11) move left and right, the moving direction of dial gauge (1) is identical with shift value with the moving direction of sensor iron core (11) with shift value, by dial gauge (1) pickup displacement, sensor is calibrated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510349722.2A CN105043232A (en) | 2015-06-23 | 2015-06-23 | Device and method for calibrating dragged LVDT displacement sensor |
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| CN201510349722.2A CN105043232A (en) | 2015-06-23 | 2015-06-23 | Device and method for calibrating dragged LVDT displacement sensor |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105547217A (en) * | 2015-12-22 | 2016-05-04 | 中冶建筑研究总院有限公司 | Displacement generator |
| CN107605860A (en) * | 2017-08-09 | 2018-01-19 | 中国航空工业集团公司西安飞行自动控制研究所 | A kind of debugging system and adjustment method for hydraulic efficiency slide valve transducer zeroing |
| CN107869948A (en) * | 2016-09-23 | 2018-04-03 | 上海华银电器有限公司 | The test system and its method of testing of a kind of differential displacement sensor |
| CN109470558A (en) * | 2018-12-19 | 2019-03-15 | 中国科学院地球化学研究所 | A kind of calibration device for displacement sensor under high temperature and pressure |
| CN109708554A (en) * | 2018-12-28 | 2019-05-03 | 长沙五七一二飞机工业有限责任公司 | A kind of stroke measurment fixture for Hydraulic Servo Mechanism for Plane performance detection |
| CN110726391A (en) * | 2019-11-08 | 2020-01-24 | 深圳市东野精密仪器有限公司 | Digital display indicator precision compensation method, device, system and storage medium |
| CN111140592A (en) * | 2019-12-25 | 2020-05-12 | 中国航空工业集团公司金城南京机电液压工程研究中心 | Mechanical anti-twisting device of dual-redundancy linear displacement sensor |
| CN115425873A (en) * | 2022-08-30 | 2022-12-02 | 上海衡拓液压控制技术有限公司 | Zero position adjusting control device of direct-acting linear force motor |
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| CN107605860A (en) * | 2017-08-09 | 2018-01-19 | 中国航空工业集团公司西安飞行自动控制研究所 | A kind of debugging system and adjustment method for hydraulic efficiency slide valve transducer zeroing |
| CN109470558A (en) * | 2018-12-19 | 2019-03-15 | 中国科学院地球化学研究所 | A kind of calibration device for displacement sensor under high temperature and pressure |
| CN109470558B (en) * | 2018-12-19 | 2020-04-03 | 中国科学院地球化学研究所 | Displacement sensor calibration device used under high temperature and high pressure |
| CN109708554A (en) * | 2018-12-28 | 2019-05-03 | 长沙五七一二飞机工业有限责任公司 | A kind of stroke measurment fixture for Hydraulic Servo Mechanism for Plane performance detection |
| CN110726391A (en) * | 2019-11-08 | 2020-01-24 | 深圳市东野精密仪器有限公司 | Digital display indicator precision compensation method, device, system and storage medium |
| CN111140592B (en) * | 2019-12-25 | 2022-07-05 | 中国航空工业集团公司金城南京机电液压工程研究中心 | Mechanical anti-twisting device of dual-redundancy linear displacement sensor |
| CN111140592A (en) * | 2019-12-25 | 2020-05-12 | 中国航空工业集团公司金城南京机电液压工程研究中心 | Mechanical anti-twisting device of dual-redundancy linear displacement sensor |
| CN115425873A (en) * | 2022-08-30 | 2022-12-02 | 上海衡拓液压控制技术有限公司 | Zero position adjusting control device of direct-acting linear force motor |
| CN115425873B (en) * | 2022-08-30 | 2024-04-05 | 上海衡拓液压控制技术有限公司 | Zero position adjusting and controlling device of direct-acting linear force motor |
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