CN215450008U

CN215450008U - Multi-parameter automatic calibration device of oil level temperature controller for transformer

Info

Publication number: CN215450008U
Application number: CN202122296486.6U
Authority: CN
Inventors: 梅怡嘉; 孙斌; 孙超平; 费少强; 孙磊
Original assignee: Huzhou Institute Of Quality And Technical Supervision And Testing Huzhou Fiber Quality Monitoring Center And National Cocoon Silk Quality Supervision And Testing Center; China Jiliang University
Current assignee: Huzhou Institute Of Quality And Technical Supervision And Testing Huzhou Fiber Quality Monitoring Center And National Cocoon Silk Quality Supervision And Testing Center; China Jiliang University
Priority date: 2021-09-23
Filing date: 2021-09-23
Publication date: 2022-01-07
Anticipated expiration: 2031-09-23

Abstract

The utility model discloses a multi-parameter automatic calibration device of an oil level temperature controller for a transformer. The device comprises a black box, a standard platinum resistor, a constant temperature oil groove, a collecting card, a computer, a camera and an oil surface temperature controller for the transformer to be calibrated; the oil surface temperature controller for the transformer to be calibrated comprises a platinum resistor, a temperature switch and a pointer dial. The utility model adopts a camera to photograph and identify the indicating value of the dial plate of the pointer, and collects the platinum resistance temperature value, the standard platinum resistance temperature value and the temperature switch response condition of the oil surface temperature controller for the transformer through a data collection meter. The device can realize the calibration of the platinum resistance temperature value, the temperature switch response condition and the indicating value of the pointer dial plate at the same time. Compared with the traditional mode of separately calibrating the platinum resistance temperature value and the temperature switch response condition, the working efficiency is improved, the error caused by human factors is reduced by automatically identifying the indication value of the pointer dial, and the comprehensive quality management is favorably realized.

Description

Multi-parameter automatic calibration device of oil level temperature controller for transformer

Technical Field

The utility model relates to the field of automatic calibration, in particular to a multi-parameter automatic calibration device of an oil surface temperature controller for a transformer.

Background

The oil surface temperature controller for the transformer is widely applied to various large power industries, and in order to ensure the reliable metering characteristics of the oil surface temperature controller, regular calibration test must be carried out. At present, each measurement institute is traditional manual calibration to the calibration of the oil level temperature controller for the transformer, and the platinum resistor and the temperature switch of the oil level temperature controller for the transformer need to be separately calibrated, so that an operator needs to manually adjust the temperature of the constant-temperature oil groove, manually read the indicating value of the dial plate of the pointer, and manually record the action temperature of the temperature switch and manually process data. The whole calibration process is complex, the workload is large, and the manual recording and processing data are easy to make mistakes.

Disclosure of Invention

In order to solve the problem in the conventional manual calibration, the utility model provides a multi-parameter automatic calibration device of an oil level temperature controller for a transformer, which is used for simultaneously calibrating a platinum resistor and a temperature switch of the oil level temperature controller for the transformer, automatically identifying a pointer dial indicating value of the oil level temperature controller for the transformer by a camera based on deep learning, performing error calculation and uncertainty analysis, storing and processing data and improving the calibration efficiency and accuracy.

A multi-parameter automatic calibration device of an oil level temperature controller for a transformer comprises a camera bellows, a standard platinum resistor, a constant temperature oil groove, a collection card, a computer, a camera and the oil level temperature controller for the transformer to be calibrated; the oil surface temperature controller for the transformer to be calibrated comprises a platinum resistor, a temperature switch and a pointer dial; the temperature switch, the pointer dial plate and the camera are arranged in the dark box; the platinum resistor and the standard platinum resistor are arranged on the upper part of the constant-temperature oil groove; the platinum resistor, the temperature switch and the standard platinum resistor are connected with the acquisition card; the output end of the acquisition card is connected with a computer; the camera is connected with the computer.

Furthermore, a constant temperature oil tank controller is arranged in the constant temperature oil tank and is connected with a computer to control the temperature in the constant temperature oil tank to operate according to a set temperature rising and falling speed.

Furthermore, the relative position of the pointer dial plate and the camera is fixed.

The utility model has the beneficial effects that:

the multi-parameter automatic calibration device of the oil level temperature controller for the transformer realizes the simultaneous automatic calibration of the platinum resistance temperature, the pointer dial indication temperature and the temperature switch action temperature of the oil level temperature controller for the transformer, the camera automatically identifies the indication value of the pointer dial, the computer carries out error calculation and uncertainty analysis and stores and processes data, the complicated manual operation process is replaced, the operation steps during detection are reduced, and the calibration efficiency and the accuracy are improved.

Drawings

FIG. 1 is a schematic diagram of the system of the present invention.

Detailed Description

The utility model will be further explained with reference to the drawings.

Example (b):

fig. 1 is a schematic diagram of a system structure of a multi-parameter automatic calibration device of an oil level temperature controller for a transformer, the device comprises: the calibration system comprises a camera bellows 1, a standard platinum resistor 4, a constant temperature oil groove 6, a collection card 8, a computer 9, a camera 10 and an oil surface temperature controller for the transformer to be calibrated. The oil surface temperature controller for the transformer to be calibrated comprises a platinum resistor 3, a temperature switch 7 and a pointer dial 2. The temperature switch 7, the pointer dial 2 and the camera 10 are arranged in the camera bellows 1. The platinum resistor 3 and the standard platinum resistor 4 are arranged on the upper part of the constant-temperature oil groove 6. The platinum resistor 3, the temperature switch 7 and the standard platinum resistor 4 are connected with the acquisition card 8. The output end of the acquisition card 8 is connected with the computer 9. A constant temperature oil tank controller 5 is arranged in the constant temperature oil tank 6, and the constant temperature oil tank controller 5 is connected with a computer 9. The camera 10 is connected to the computer 9.

The implementation of the automatic calibration comprises the following steps:

step 1, a platinum resistor 3 and a standard platinum resistor 4 of an oil surface temperature controller for a transformer to be calibrated are placed in a constant temperature oil tank 6, and output signals of the platinum resistor 3, the standard platinum resistor 4 and a temperature switch 7 are connected to a collecting card 8. The pointer dial 2 and the camera 10 of the oil level temperature controller for the transformer are fixed in the camera 1 to ensure that collected pictures are not influenced by environmental illumination, and the relative position of the pointer dial 2 and the camera 10 is required to be fixed to eliminate the influence of position deviation on the image recognition accuracy. The camera 10, the acquisition card 8 and the constant temperature oil tank controller 5 are connected with the computer 9.

Step 2, according to the set value of the temperature switch 7, determining the static temperature point of the oil surface temperature controller for the transformer to be calibrated and setting a temperature rise and fall rate temperature section: according to the national calibration standard, the temperature is kept for 10 minutes at +/-10 ℃ of a static temperature point needing to be calibrated and +/-10 ℃ of a set value of the temperature switch 7, and the temperature is increased according to the temperature increasing slope of 1 ℃/min in the temperature increasing and decreasing rate section of the set value of the temperature switch 7.

Step 3, the computer 9 controls the constant temperature oil tank 6 to keep the temperature constant at a set and calibrated static temperature point by controlling the constant temperature oil tank controller 5, and collects output values of the platinum resistor 3 and the standard platinum resistor 4 by a collection card 8; the camera 10 collects images of the pointer dial 2, and the computer 9 automatically identifies the indication value of the pointer dial 2 through a depth learning algorithm.

And 4, controlling the constant-temperature oil tank 6 to be heated up according to a set heating slope in a temperature rise and reduction rate section by the computer 9 through controlling the constant-temperature oil tank controller 5, and heating up according to the maximum power of the constant-temperature oil tank 6 in a temperature section beyond the static temperature point +/-10 ℃.

And 5, monitoring the response condition of a temperature switch 7 of the oil surface temperature controller for the transformer in real time by an acquisition card 8, and recording the output value of the standard platinum resistor 4 by the acquisition card 8 when the temperature switch 7 acts.

Step 6, the computer 9 stores and gives a calibration report according to the output signal of the platinum resistor 3, the data of the indicating value of the pointer dial 2 and the output signal of the standard platinum resistor 4 and the error between the output signal and the data when the static temperature is at the point; when the temperature switch 7 is operated, the data of the output value of the standard platinum resistor 4 and the set value of the temperature switch 7 and the error between the output value and the set value are stored and a calibration report is given.

The multi-parameter automatic calibration device for the oil surface temperature controller for the transformer realizes simultaneous calibration of the platinum resistor and the temperature switch of the oil surface temperature controller for the transformer, automatically identifies the indicating value of the dial plate, calculates the uncertainty of error analysis, stores and processes data, replaces a complicated manual operation process, and improves the calibration efficiency and the accuracy.

Claims

1. The utility model provides a multi-parameter automatic calibration device of oil level temperature controller for transformer which characterized in that:

the device comprises a black box, a standard platinum resistor, a constant temperature oil groove, a collecting card, a computer, a camera and an oil surface temperature controller for the transformer to be calibrated; the oil surface temperature controller for the transformer to be calibrated comprises a platinum resistor, a temperature switch and a pointer dial;

the temperature switch, the pointer dial plate and the camera are arranged in the dark box; the platinum resistor and the standard platinum resistor are arranged on the upper part of the constant-temperature oil groove; the platinum resistor, the temperature switch and the standard platinum resistor are connected with the acquisition card; the output end of the acquisition card is connected with a computer; the camera is connected with the computer.

2. The multi-parameter automatic calibration device of the oil level temperature controller for the transformer according to claim 1, characterized in that:

and a constant-temperature oil tank controller is arranged in the constant-temperature oil tank and is connected with a computer to control the temperature in the constant-temperature oil tank to run according to the set temperature rising and falling speed.

3. The multi-parameter automatic calibration device of the oil level temperature controller for the transformer according to claim 1, characterized in that:

the relative position of the pointer dial plate and the camera is fixed.