High-precision non-contact height measuring device

Abstract

The invention provides a high-precision non-contact height measuring device which comprises a differential pressure transmitter and a detection box; the differential pressure transmitter is communicated with the lower portion of the detection box through a hose, the detection box and the hose are filled with a measuring liquid, and the detection box is located on a container to be measured. The differential pressure transmitter is used for measuring the differential pressure change of the measuring liquid in the hose and converting the differential pressure change into the height of the container to be measured; a temperature sensor is used for compensating the density of the measuring liquid, so the measuring error is reduced; meanwhile, a bubble remover is used for ensuring that the liquid entering the hose has no bubbles, and the measuring accuracy is improved. The high-precision non-contact height measuring device is simple in structure, convenient to install and maintain, low in manufacturing and using cost, high in measuring precision and wide in an application range.

Description

technical field [0001] The invention belongs to the technical field of detection, and in particular relates to a high-precision non-contact height measuring device. Background technique [0002] There are many types of relative height detection devices. At present, laser measurement devices are mainly used to measure the height of scalable large-volume containers with high precision. However, there are the following problems in the actual measurement process: First, the installation of laser measurement devices It is more complicated. The measurement principle of the laser measuring device is to emit laser light to a fixed reflecting device and then reflect it back to calculate the height of the measured object. To achieve accurate measurement, there should be no obstruction between the laser emitting device and the fixed reflecting device. If there is no obstruction between the laser emitting device and the fixed reflecting device, the laser emitting device and the fixed re...

AI Technical Summary

Problems solved by technology

[0002] There are many types of relative height detection devices. At present, laser measurement devices are mainly used to measure the height of scalable large-volume containers with high precision. However, there are the following problems in the actual measurement process: First, the installation of laser measurement devices It is more complicated. The measurement principle of the laser measuring device is to emit laser light to a fixed reflecting device and then reflect it back to calculate the height of the measured object. To achieve accurate measurement, there should be no obstruction between the laser emitting device and the fixed reflecting device. If there is no obstruction between the laser emitting device and the fixed reflecting device, the laser emitting device and the fixed reflecting device must be installed outside the device under test, which undoubtedly creates a risk of falling from a high place for the installation and maintenance of the laser measuring device At the same time, the abnormal weather with high smog and high dust has a great impact on the accuracy of the measurement device; second, the existing laser measurement device uses the cement floor as a fixed reflection device, because the smoothness of the cement floor does not meet the technical requirements , and the height of the concrete floor is also uneven, which greatly reduces the accuracy of the measurement, and the inaccurate measurement will pose a threat to the safe operation of the equipment; third, the investment cost and maintenance cost of the laser measurement device are relatively high

However, the traditional differential pressure measurement device needs to be in contact with the medium in the container under test, which not only affects the quality of the liquid stored in the container, but also has the risk of leakage at the weld and valve connection, especially when the medium in the container under test is Inflammable, explosive, toxic and harmful media, it will be very dangerous

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