CN211626327U

CN211626327U - Micro-measurement displacement sensing calibrator

Info

Publication number: CN211626327U
Application number: CN202020582224.9U
Authority: CN
Inventors: 刘洋
Original assignee: Beijing Dongfang Zhongheng Technology Development Co ltd
Current assignee: Beijing Dongfang Zhongheng Technology Development Co ltd
Priority date: 2020-04-19
Filing date: 2020-04-19
Publication date: 2020-10-02
Anticipated expiration: 2030-04-19

Abstract

The utility model relates to a little measurement displacement sensing calibrator, remove slip table, locking knob, micrometer caliper including bottom plate, high accuracy, the slider is installed to bottom plate upper surface one end, the high accuracy removes the slip table and includes base and slide, base fixed mounting is in the bottom plate upper surface, the slide passes through slide rail and base sliding fit, the side fixed mounting of bottom plate has the support to link the latch fitting, the support is linked fixed mounting micrometer caliper on the latch fitting, slide top surface fixed mounting has the fixed block, the base side is fixed with the locking plate, sets up the bar hole on the locking plate, and locking knob one end is passed the bar hole, with slide side threaded connection. The special calibration equipment for calibrating the strain micro-displacement sensor equipment is simple to operate and ultrahigh in precision. The product can calibrate the micro-displacement sensor to determine the input and output relationship between the displacement and the digital output value.

Description

Micro-measurement displacement sensing calibrator

Technical Field

The utility model relates to a little displacement monitoring facilities technical field of meeting an emergency, specific little measurement displacement sensing calibrator that says so.

Background

The strain sensor outputs frequency signals, has good long-term stability, is suitable for severe working environments, and is widely applied to bridges and buildings, water conservancy and hydropower, petrochemical industry and other aspects. Since strain sensors serve as important safety monitoring functions, accurate and reliable calibration of their output characteristics is particularly important. In view of the fact that no unified calibration standard exists in China at present, after the paper analyzes the basic principle of the sensor, a calibration method of the sensor is provided according to relevant national standards. In recent years, various civil engineering construction developments are in the golden period, and in order to ensure the safety and durability of these expensive items and the safety of residents around the engineering, internal deformation monitoring of dams, foundation pits, slopes, drill holes, and the like has become important.

It is particularly important that the data of the monitored product is accurate, and it is particularly important to perform calibration before delivery and at regular intervals.

The strain of the strain sensor is a proportional value of the tiny displacement generated at two ends of the sensor and the original basic length of the sensor. The sensor can work only when the steel string deforms under the action of certain tension or pressure, namely, strain is generated, the magnitude of the force can not be known, but the relative displacement of the two ends needs to be accurately measured. The national standard 'general technical conditions of vibrating wire type sensors of geotechnical engineering instruments' puts forward technical requirements on the aspects of basic errors, linearity and the like of the sensors, but the standard does not stipulate which standard apparatus is adopted to ensure that the magnitude is accurate and reliable, and does not stipulate a uniform calibration method. At present, the user of the strain sensor sends the instrument to a metering mechanism to require tracing, originally, the digital display indicating gauge is used as a displacement standard, manual pushing force is adopted to generate strain, and comparative measurement is carried out. The calibration of the sensor is to calibrate the sensor, obtain a relational expression of input and output, and further evaluate the basic error of the sensor. According to the national standard 'calculation method of main static performance indexes of the sensor', the calibration of the strain sensor can adopt a multipoint repeated test method, namely, 11 measurement points are uniformly selected in the whole working range of the sensor and comprise an upper limit and a lower limit, an input strain value and an output frequency value are recorded at each measurement point in sequence, a forward stroke and a backward stroke are taken as a measurement cycle, 3 cycles are measured in total, a relational expression is solved by adopting a least square method according to the measurement data, and a coefficient k of the expression, namely a ratio of an output frequency modulus to strain is obtained, namely, the calibration method of the sensitivity of the vibrating wire type strain sensor is provided.

The existing calibrator has the defects of complex structure, inconvenient movement and installation and high difficulty in component replacement.

SUMMERY OF THE UTILITY MODEL

Not enough to above-mentioned prior art, the utility model provides a little measurement displacement sensing calibrator.

The utility model provides a pair of little measurement displacement sensing calibrator is realized through following technical scheme:

the utility model provides a little measurement displacement sensing calibrator, removes slip table, locking knob, micrometer caliper including bottom plate, high accuracy, the slider is installed to bottom plate upper surface one end, the high accuracy removes the slip table and includes base and slide, base fixed mounting is in the bottom plate upper surface, the slide passes through slide rail and base sliding fit, the side fixed mounting of bottom plate has the support to link the latch fitting, fixed mounting micrometer caliper on the latch fitting is linked in the support, and micrometer caliper of micrometer caliper is corresponding with the alloy steel measurement station that is fixed in the slide side, slide top surface fixed mounting has the fixed block, the base side is fixed with the locking plate, sets up the bar hole on the locking plate, and locking knob one end passes the bar hole, with slide side threaded connection.

The alloy steel measuring point is of a semicircular structure, and the material is 7Cr17 stainless steel material.

A T-shaped groove is formed in one end of the bottom plate, the locking bolt is located in the T-shaped groove, and the front end of the locking bolt penetrates through the T-shaped groove to be in threaded connection with the bottom of the sliding block.

And a return spring is connected between the sliding seat and the base, one end of the return spring is connected with the upper surface of the base, and the other end of the return spring is connected with the bottom surface of the sliding seat.

The micrometer caliper can adopt a digital display micrometer caliper and consists of a micrometer caliper locking knob, a digital display control panel, a scale numerical value area, a micrometer caliper adjusting knob and a fine adjustment knob.

The utility model has the advantages that:

the precision is high: the precision reaches 0.001mm through the composition of the whole structure. One end adopts stable fixed mode, and the other end adopts step-by-step structure for the precision is high, the accuracy is good.

The operation is convenient: the equipment is simple to operate, two steps of equipment can be completed at present through different debugging preparations of a plurality of pieces of equipment, the tested device is fixedly placed on the equipment, and the test work can be started, so that the work and time of other calibrations are saved.

The structure is simple: through the hammering of many years of project experience, the improvement is always carried out, the current structure is optimized and simple, the simplicity of maintenance is ensured, the requirement on the working environment is not strict (only the horizontal plane is ensured), and the replacement part is convenient to process and replace.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic plan view of the present invention;

FIG. 3 is a schematic view of a base and a slider slide fit arrangement;

FIG. 4 is a schematic view of a return spring mounting arrangement;

FIG. 5 is a schematic view of a slider-to-base connection structure.

Detailed Description

The technical solution of the present invention will be described clearly and completely by the following embodiments, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by the skilled in the art without creative work belong to the protection scope of the present invention.

A micrometering displacement sensing calibrator comprises a bottom plate 1, a high-precision moving sliding table 3, a locking knob 35 and a micrometer screw 9, wherein a sliding block 2 is installed at one end of the upper surface of the bottom plate 1, the high-precision moving sliding table 3 comprises a base 31 and a sliding seat 32, the base 31 is fixedly installed on the upper surface of the bottom plate 1 through bolts, the sliding seat 32 is in sliding fit with the base 31 through an L-shaped sliding rail 33, a supporting and linking locking piece 8 is fixedly installed on the side surface of the bottom plate 1, the micrometer screw 9 is fixedly installed on the supporting and linking locking piece 8, a micrometer screw 7 of the micrometer screw 9 corresponds to an alloy steel measuring point 6 fixed on the side surface of the sliding seat, a fixed block 4 is fixedly installed on the top surface of the sliding seat 32, the fixed block 4 is used for installing a measured object, namely a vibrating string type sensor, a locking piece 5 is fixed on the side surface of the base 31, a strip-, the sliding seat 32 can slide for dynamic measurement by connecting the side surface of the sliding seat 32 with a thread and unscrewing the locking knob 35; the locking knob 35 is tightened and the slide 32 is locked to the base 31 for static measurement. Balls 34 are provided between the L-shaped slide rails 33 to facilitate sliding.

The alloy steel measuring point 6 is of a semicircular structure and made of 7Cr17 stainless steel.

T type groove A has been seted up to bottom plate 1 one end, and locking bolt 15 is located T type inslot and the front end passes T type groove and slider 2 bottom threaded connection. The locking bolt is unscrewed, the sliding block 2 can be slid, the distance between the sliding block 2 and the fixed block 4 is adjusted, and the vibrating wire type sensor can adapt to measured objects with different lengths, namely vibrating wire type sensors.

And a return spring 36 is connected between the sliding seat 32 and the base 31, one end of the return spring 36 is connected to the upper surface of the base 31, and the other end is connected to the bottom surface of the sliding seat 32.

The micrometer screw 9 is composed of a micrometer locking knob 10, a digital display control panel 11, a scale numerical value area 12, a micrometer adjusting knob 13 and a fine adjusting knob 14. The micrometer screw 9 can be a common digital micrometer screw, and the arched frame, i.e. the original clamping part, is removed and fixed on the supporting link locking piece 8.

The technical parameters of the micro-measurement displacement sensing calibrator are as follows:

the novel strain micro-displacement calibrator has the following use modes:

the two ends of equipment to be calibrated are respectively arranged on the fixed block 4 and the sliding block 2, the two ends are fixed well through binding bands (some equipment only needs to fix one end), the initial position is marked as 0, then the micrometer caliper adjusting knob is rotated, if the displacement is adjusted to be 1mm, the stroke of the displacement sensor is changed at the same time, the numerical value change of the digital display control panel 11 is observed and recorded; and calibrating according to the parameters.

The above-described embodiments are merely illustrative of embodiments of the present invention, which are described in detail and detail, but are not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention.

Claims

1. A micro-measurement displacement sensing calibrator is characterized in that: including bottom plate, high accuracy removal slip table, locking knob, micrometer caliper, the slider is installed to bottom plate upper surface one end, the high accuracy removes the slip table and includes base and slide, base fixed mounting is in the bottom plate upper surface, the slide passes through slide rail and base sliding fit, the side fixed mounting of bottom plate has the support to link the latch fitting, fixed mounting micrometer caliper on the latch fitting is linked in the support, and micrometer caliper's micrometer screw rod is corresponding with the alloy steel measurement station that is fixed in the slide side, slide top surface fixed mounting has the fixed block, the base side is fixed with the locking plate, offers the bar hole on the locking plate, and locking knob one end is passed the bar hole, with slide side threaded connection.

2. The micrometric displacement sensing calibrator as recited in claim 1, wherein: the alloy steel measuring point is of a semicircular structure, and the material is 7Cr17 stainless steel material.

3. The micrometric displacement sensing calibrator as recited in claim 1, wherein: a T-shaped groove is formed in one end of the bottom plate, the locking bolt is located in the T-shaped groove, and the front end of the locking bolt penetrates through the T-shaped groove to be in threaded connection with the bottom of the sliding block.

4. The micrometric displacement sensing calibrator as recited in claim 1, wherein: and a return spring is connected between the sliding seat and the base, one end of the return spring is connected with the upper surface of the base, and the other end of the return spring is connected with the bottom surface of the sliding seat.

5. The micrometric displacement sensing calibrator as recited in claim 1, wherein: the micrometer caliper can adopt a digital display micrometer caliper and consists of a micrometer caliper locking knob, a digital display control panel, a scale numerical value area, a micrometer caliper adjusting knob and a fine adjustment knob.