Glass-bulb thermometers automatic detection device and detection method

Abstract

A glass thermometer automatic detection device is composed of a camera, data acquisition and control equipment, a stepping motor and a bracket. The camera is shooting the glass thermometer on the bracket, outputting image signals to the image acquisition and control equipment, image acquisition and control The device performs image processing and data analysis on the image signal, and then outputs control signals to control the action of the stepping motor and control the temperature rise of the constant temperature bath. The stepping motor drives the bracket to rotate and lift horizontally to complete the automatic detection of the glass thermometer. The invention uses a stepping motor to control the horizontal rotation and lifting of the bracket, which can be automatically detected in batches, and has a simple and practical structure; a camera with a short-distance adjustable focus function is used to improve the accuracy and reliability of the detection, and at the same time avoid harmful effects on the spot. The damage of volatiles to the body; the image acquisition and processing equipment is used to judge the display value of the glass thermometer, and the action of the stepping motor and the constant temperature bath is controlled according to the judgment result, which reduces the detection cost and improves the work efficiency.

Description

technical field [0001] The invention relates to an automatic detection device and a detection method, in particular to a glass thermometer automatic detection device and a detection method, which can be widely used in the automatic detection of glass thermometers and pointer instruments in the field of industrial measurement and testing. Background technique [0002] The accuracy of the glass thermometer is usually tested at 4 representative points, that is, its lower limit, upper limit, middle and evenly take two points for detection, so as to judge its overall performance. Most other pointer instruments usually use this method. At present, there are the following problems in the detection of glass thermometers: 1. It takes a long time to heat up the constant temperature bath and stabilize the temperature field, and the staff needs to spend a lot of time observing the stability of the temperature field in real time. The detection process is time-consuming and expensive 2. T...

AI Technical Summary

Problems solved by technology

At present, there are the following problems in the detection of glass thermometers: 1. It takes a long time to heat up the constant temperature bath and stabilize the temperature field, and the staff needs to spend a lot of time observing the stability of the temperature field in real time. The detection process is time-consuming and expensive 2. The number of glass thermometers used in China is large, and the testing workload of the measurement department and the instrument industry is quite large; 3. The price of glass thermometers is low, and the testing costs are also low, and low-efficiency testing increases economic costs; 4. The scale of the glass thermometer is small, difficult to read, prone to errors, and requires relatively high vision of the inspectors; 5. The pollution is large, and the medium oil in the oil tank volatilizes carcinogens at high temperatures, which is likely to cause occupational injury to the inspectors

The Chinese Institute of Metrology was the first to do this work in China. They used cameras and monitors, and then manually watched the monitors to record the readings. Others also required manual operations, and the work efficiency was relatively low.

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