CN214702436U

CN214702436U - Calibration tool

Info

Publication number: CN214702436U
Application number: CN202120232522.XU
Authority: CN
Inventors: 凌杰文; 谢云芳; 颜天宝
Original assignee: Daren Intelligent Technology Foshan Co ltd
Current assignee: Daren Intelligent Technology Foshan Co ltd
Priority date: 2021-01-27
Filing date: 2021-01-27
Publication date: 2021-11-12
Anticipated expiration: 2031-01-27

Abstract

The utility model discloses a calibration tool, which comprises a shell and a lifting mechanism, wherein the top of the shell is provided with a placing groove and a limiting mechanism, the placing groove is used for placing a capacitive liquid level sensor to be calibrated, and the limiting mechanism is used for limiting the movable position of the capacitive liquid level sensor to be calibrated; a metal plate is arranged in the shell, is parallel to the placing groove and is grounded; the lifting mechanism is used for adjusting the distance between the metal plate and the placing groove; the utility model provides a calibration frock, at the in-service use in-process, calibration frock is connected with external control device, and stop gear will treat the capacitanc level sensor of calibration and compress tightly in the standing groove, through the distance between elevating system adjustment metal sheet and the standing groove to the change treats the capacitance level sensor's of calibration measured value, and according to external control device's testing result, calibrates capacitanc level sensor, improves testing result's validity.

Description

Calibration tool

Technical Field

The utility model relates to a calibrating device technical field, in particular to calibration frock.

Background

A capacitance type liquid level sensor, which is a device that converts a change in the position of a measured object into a capacitance; in the actual use process of the capacitive liquid level sensor, for the device provided with the sensor, the capacitance value exists in the device due to the influence of factors such as the thickness and the material of the sensing surface of the device, and the capacitance value also exists in the use environment, so that the capacitive liquid level sensor needs to be calibrated according to the actual use condition in order to ensure the validity and the accuracy of the detection result of the capacitive liquid level sensor.

In the prior art, a capacitance type liquid level sensor is generally directly arranged on a corresponding device, and the detection capacity value of the capacitance type liquid level sensor is calibrated by simulating an actual use environment, so that the problem of troublesome calibration operation exists; in addition, because the actual device generally has great volume, consequently, need occupy and put the space many, have certain influence to production and testing process.

It is seen that improvements and enhancements to the prior art are needed.

SUMMERY OF THE UTILITY MODEL

In view of the defects of the prior art, the utility model aims to provide a calibration tool, which has smaller overall volume and occupies less space; the distance between the metal plate and the placing groove is adjusted through the lifting mechanism, so that the adjustment of the actually measured capacitance value of the capacitive liquid level sensor can be realized, and the difficulty of calibration work is reduced.

In order to achieve the purpose, the utility model adopts the following technical proposal:

a calibration tool comprises a shell and a lifting mechanism, wherein a placing groove and a limiting mechanism are arranged at the top of the shell, the placing groove is used for placing a to-be-calibrated capacitive liquid level sensor, and the limiting mechanism is used for limiting the movable position of the to-be-calibrated capacitive liquid level sensor; a metal plate is arranged in the shell, is parallel to the placing groove and is grounded; the lifting mechanism is used for adjusting the distance between the metal plate and the placing groove.

In the calibration tool, the lifting mechanism comprises a first handle, a second handle, a fixture block, a gear and a fixed block, and the fixed block and the fixture block are respectively and fixedly arranged at the bottom of the metal plate; the shell is provided with a sliding groove, the first handle is connected with the fixed block through the sliding groove, and the first handle can move up and down in the sliding groove; the shell is also provided with a connecting hole, and the second handle is connected with the gear through the connecting hole; the fixture block is provided with a plurality of fixture strips, and the fixture strips are meshed with the gear.

In the calibration tool, the top of the fixed block is provided with a first positioning column, a first positioning hole is formed in the metal plate, and the first positioning column is connected with the first positioning hole in a matched mode.

In the calibration tool, a second positioning column is arranged at the top of the fixture block, a second positioning hole is formed in the metal plate, and the second positioning column is connected with the second positioning hole in a matched mode.

In the calibration tool, the lifting mechanism further comprises a gasket, the first handle comprises a fixed head and a connecting shaft, one end of the connecting shaft is connected with the fixed head, the other end of the connecting shaft is connected with the fixed block, the gasket is arranged on the connecting shaft, and the gasket is located between the fixed head and the shell.

In the calibration tool, the limiting mechanism comprises a fixed seat, a spring seat and a fixed column, the fixed seat is fixedly arranged at the top of the shell, the spring seat is fixedly arranged at the top of the fixed seat, the fixed column is slidably arranged in the spring seat, and the fixed column is used for limiting the movable position of the capacitive liquid level sensor to be detected.

In the calibration tool, a plurality of guide rods are arranged in the shell, a plurality of guide holes are formed in the metal plate, and the guide rods are connected with the guide holes in a matched mode.

Has the advantages that:

the utility model provides a calibration tool, which has small overall volume and needs less occupied placing space; in the actual use process, the calibration tool is connected with an external control device, and a capacitance value required by the capacitive liquid level sensor in actual work is preset in the external control device; the limiting mechanism tightly presses the capacitive liquid level sensor to be calibrated in the placing groove, and the distance between the metal plate and the placing groove is adjusted through the lifting mechanism so as to change the measured value of the capacitive liquid level sensor to be calibrated, so that the operation is simple, and the difficulty of calibration work is reduced; according to the detection result of the external control device, whether the actually measured capacitance value is consistent with the preset capacitance value or not is judged, if so, the calibration capacitance value is obtained according to the distance between the metal plate and the placing groove at the moment, and the calibration capacitance value is stored in the capacitive sensor to be calibrated so as to realize the calibration of the capacitive liquid level sensor and improve the validity and the accuracy of the detection result of the capacitive liquid level sensor.

Drawings

Fig. 1 is a schematic structural diagram of a calibration fixture provided by the present invention;

fig. 2 is a schematic view of an internal structure of the calibration fixture provided by the present invention;

fig. 3 is a schematic view of a connection structure between the limiting mechanism and the housing according to the present invention;

fig. 4 is a schematic structural view of the fixing block, the first handle and the gasket provided by the present invention.

Description of the main element symbols: 1-shell, 11-sliding groove, 12-guide rod, 21-first handle, 211-fixed head, 212-connecting shaft, 22-second handle, 23-clamping block, 24-gear, 25-fixed block, 251-first positioning column, 26-gasket, 3-placing groove, 4-limiting mechanism, 41-fixed seat, 42-spring seat, 43-fixed column, 5-metal plate, 51-first positioning hole and 52-second positioning hole.

Detailed Description

The utility model provides a calibration frock, for making the utility model discloses a purpose, technical scheme and effect are clearer, make clear and definite, and it is right that the embodiment is lifted to follow reference to the attached drawing the utility model discloses do further detailed description.

In the description of the present invention, it should be understood that the terms "top", "left", "right", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for convenience of description and simplification of description, and should not be construed as limiting the present invention; in addition, the terms "mounted," "connected," and the like are to be construed broadly, and those skilled in the art can understand the specific meaning of the terms in the present invention according to specific situations.

Referring to fig. 1 to 4, the utility model provides a calibration tool, which comprises a housing 1 and a lifting mechanism, wherein a placing groove 3 and a limiting mechanism 4 are arranged at the top of the housing 1, the placing groove 3 is used for placing a to-be-calibrated capacitive liquid level sensor, and the limiting mechanism 4 is used for limiting the movable position of the to-be-calibrated capacitive liquid level sensor; a metal plate 5 is arranged in the shell 1, the metal plate 5 is parallel to the placing groove 3, and the metal plate 5 is grounded; the lifting mechanism is used for adjusting the distance between the metal plate 5 and the placing groove 3.

The calibration tool disclosed by the application has the advantages that the overall size is small, the occupied placing space is small, and the calibration work in a production workshop is facilitated; in the actual calibration process, the calibration tool is connected with an external control device, and a capacitance value required by the capacitive liquid level sensor in actual working is preset in the external control device; the limiting mechanism 4 tightly presses the to-be-calibrated capacitive liquid level sensor into the placing groove 3, and the distance between the metal plate 5 and the placing groove 3 is adjusted through the lifting mechanism so as to change the actually-measured capacitance value of the to-be-calibrated capacitive liquid level sensor, so that the operation is simple, and the difficulty of calibration work is reduced; when the working key of the external control device is pressed, the to-be-calibrated capacitive liquid level sensor is disconnected for 1 second and then powered on again, in the moment of power on, the external control device detects whether the situation that the connecting port connected with the to-be-calibrated capacitive liquid level sensor is pulled down occurs, if the situation that the connecting port is pulled down occurs, the fact that the actually-measured capacitance value of the to-be-calibrated capacitive liquid level sensor is consistent with the preset required capacitance value is shown, the calibration capacitance value is obtained according to the distance between the metal plate 5 and the placing groove 3 at the moment, and the calibration capacitance value is stored in the to-be-calibrated capacitive liquid level sensor, so that the calibration of the capacitive liquid level sensor is realized, and the effectiveness and the accuracy of the detection result of the capacitive liquid level sensor are improved.

Further, referring to fig. 1, fig. 2 and fig. 4, the lifting mechanism includes a first handle 21, a second handle 22, a block 23, a gear 24 and a fixing block 25, wherein the fixing block 25 and the block 23 are respectively fixed at the bottom of the metal plate 5; a sliding groove 11 is formed in the shell 1, the first handle 21 is connected with the fixed block 25 through the sliding groove 11, and the first handle 21 can move up and down in the sliding groove 11; a connecting hole is further formed in the shell 1, and the second handle 22 is connected with the gear 24 through the connecting hole; a plurality of clamping strips are arranged on the clamping block 23 and are meshed with the gear 24; in the actual calibration process, a worker can move the metal plate 5 through the first handle 21 to adjust the distance between the metal plate 5 and the placing groove 3, and the gear 24 is matched with the clamping strip to fix the metal plate 5; in addition, in the actual calibration process, the second handle 22 is rotated, so that the gear 24 can move up and down along the clamping strips on the clamping blocks 23, the fine adjustment of the distance between the metal plate 5 and the placing groove 3 is realized, and the use flexibility of the calibration tool is improved.

Further, referring to fig. 2 and 4, a first positioning post 251 is disposed at the top of the fixing block 25, a first positioning hole 51 is disposed on the metal plate 5, and the first positioning post 251 is connected to the first positioning hole 51 in a matching manner; the first positioning holes 51 and the first positioning columns 251 are arranged, so that the fixing blocks 25 and the metal plates 5 can be quickly matched and mounted, the assembling efficiency is improved, and the assembling difficulty is reduced.

Further, please refer to fig. 2, a second positioning column is disposed at the top of the clamping block 23, a second positioning hole 52 is disposed on the metal plate 5, and the second positioning column is connected to the second positioning hole 52 in a matching manner; set up second locating hole 52 and second reference column, can realize fixture block 23 and metal sheet 5's quick matching installation, improve the packaging efficiency, reduce the equipment degree of difficulty.

Further, referring to fig. 2 and 4, the lifting mechanism further includes a washer 26, the first handle 21 includes a fixing head 211 and a connecting shaft 212, one end of the connecting shaft 212 is connected to the fixing head 211, the other end of the connecting shaft 212 is connected to the fixing block 25, and the connecting shaft 212 slides in the sliding slot 11; the washer 26 is arranged on the connecting shaft 212, and the washer 26 is positioned between the fixing head 211 and the shell 1; the gasket 26 is arranged, so that the first handle 21 is prevented from rubbing with the shell 1 in the lifting process, the contact surface between the fixing head 211 and the shell 1 can be kept smooth and flat, and the service life of the calibration tool is prolonged.

Further, referring to fig. 1 to 3, the limiting mechanism 4 includes a fixed seat 41, a spring seat 42 and a fixed column 43, the fixed seat 41 is fixedly disposed at the top of the housing 1, the spring seat 42 is fixedly disposed at the top of the fixed seat 41, the fixed column 43 is slidably disposed in the spring seat 42, and the fixed column 43 is used for limiting a moving position of the capacitive liquid level sensor to be detected; in one embodiment, the fixed seat 41 is connected to the housing 1 by a screw, and the spring seat 42 is connected to the fixed seat 41 by a screw.

Further, referring to fig. 2, a plurality of guide rods 12 are arranged in the housing 1, a plurality of guide holes are formed in the metal plate 5, and the guide rods 12 are connected with the guide holes in a matching manner; the guide rod 12 is arranged and used for limiting the moving direction of the metal plate 5 and avoiding the metal plate 5 from deflecting in the process of lifting movement, so that the metal plate 5 is not parallel to the placing groove 3, and the effectiveness and the accuracy of the calibration capacity value are influenced; namely, the guide rod 12 is arranged, so that the metal plate 5 can be ensured to do vertical lifting motion, and the working reliability of the calibration tool is improved.

It is understood that equivalent substitutions or changes can be made by those skilled in the art according to the technical solution of the present invention and the inventive concept thereof, and all such changes or substitutions shall fall within the scope of the present invention.

Claims

1. The calibration tool is characterized by comprising a shell and a lifting mechanism, wherein a placing groove and a limiting mechanism are arranged at the top of the shell, the placing groove is used for placing a to-be-calibrated capacitive liquid level sensor, and the limiting mechanism is used for limiting the movable position of the to-be-calibrated capacitive liquid level sensor; a metal plate is arranged in the shell, is parallel to the placing groove and is grounded; the lifting mechanism is used for adjusting the distance between the metal plate and the placing groove.

2. The calibration fixture according to claim 1, wherein the lifting mechanism comprises a first handle, a second handle, a fixture block, a gear and a fixed block, and the fixed block and the fixture block are respectively and fixedly arranged at the bottom of the metal plate; the shell is provided with a sliding groove, the first handle is connected with the fixed block through the sliding groove, and the first handle can move up and down in the sliding groove; the shell is also provided with a connecting hole, and the second handle is connected with the gear through the connecting hole; the fixture block is provided with a plurality of fixture strips, and the fixture strips are meshed with the gear.

3. The calibration tool according to claim 2, wherein a first positioning column is arranged at the top of the fixing block, a first positioning hole is formed in the metal plate, and the first positioning column is connected with the first positioning hole in a matched manner.

4. The calibration tool according to claim 2, wherein a second positioning post is disposed on the top of the fixture block, a second positioning hole is disposed on the metal plate, and the second positioning post is connected to the second positioning hole in a matching manner.

5. The calibration fixture according to claim 2, wherein the lifting mechanism further comprises a washer, the first handle comprises a fixing head and a connecting shaft, one end of the connecting shaft is connected with the fixing head, the other end of the connecting shaft is connected with the fixing block, the washer is arranged on the connecting shaft, and the washer is located between the fixing head and the shell.

6. The calibration tool according to claim 1, wherein the limiting mechanism comprises a fixed seat, a spring seat and a fixed column, the fixed seat is fixedly arranged at the top of the housing, the spring seat is fixedly arranged at the top of the fixed seat, the fixed column is slidably arranged in the spring seat, and the fixed column is used for limiting the movable position of the capacitive liquid level sensor to be detected.

7. The calibration tool according to claim 1, wherein a plurality of guide rods are arranged in the housing, a plurality of guide holes are formed in the metal plate, and the guide rods are connected with the guide holes in a matched manner.