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A photoelectric multi-channel communication pipe liquid level bridge deflection measurement device and method

A technology of bridge deflection and measurement method, which is applied in the direction of measuring device, liquid/fluid solid measurement, lubrication indicating device, etc., can solve the problems of low accuracy of deflection detection system, disappearance of liquid level edge line, easy to be disturbed by the environment, etc. To achieve the effect of convenient installation, improved accuracy and high real-time performance

Active Publication Date: 2022-03-01
SOUTHWEST JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a more accurate photoelectric sensor that can improve the disappearance of the edge line of the liquid level in order to overcome the defects of the deflection detection system in the prior art, such as low accuracy, low real-time performance, and susceptibility to environmental interference. Device and method for measuring deflection of liquid level bridge with multi-channel connecting pipe

Method used

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  • A photoelectric multi-channel communication pipe liquid level bridge deflection measurement device and method
  • A photoelectric multi-channel communication pipe liquid level bridge deflection measurement device and method
  • A photoelectric multi-channel communication pipe liquid level bridge deflection measurement device and method

Examples

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Embodiment 1

[0049] A photoelectric multi-channel connecting pipe liquid level bridge deflection measuring device, such as figure 1 As shown, it includes a base 2, a fixed plate 1, a power supply 10, a light source 5, a horizontal connecting pipe 7, a liquid level observation pipe 3, a connecting pipe joint 4, a diffuser plate 6, a visual sensor 8, and a digital processing unit 9;

[0050] The light source 5 used in this embodiment is a bar-shaped light source and is a white light source; the fixed plate 1 has a plurality of horizontal chutes, which are used to adjust the shooting distance and height, and adapt to different measurement ranges; the digital processing unit 9 is a computer;

[0051] The plane where the base 2 is located is a horizontal plane, the fixed plate 1 is vertically installed on the base 2, and the horizontal connecting pipe 7 is a connecting pipe parallel to the base 2 and connected from the outside. The joint 4 is connected with two liquid level observation tubes 3,...

Embodiment 2

[0060] A device and method for calibrating a photoelectric multi-channel communication pipe liquid level bridge deflection measuring device constructed in Example 1, such as Figure 5 As shown, prepare lifting slide table, laser displacement meter 20, laser baffle 22, digital-analog acquisition card 21; and light source 5, astigmatism plate 6, liquid level observation tube 3, visual sensor 8, digital processing unit 9, power supply 10 all Same as embodiment 1;

[0061] In the application of bridge deflection measurement, a measurement accuracy of 0.1 mm can meet the measurement requirements. The accuracy of the laser displacement meter used in this embodiment is at the micron level, which can meet the calibration requirements with higher accuracy.

[0062] The calibration method includes the following steps,

[0063] S21, fix the liquid level of the liquid level observation tube 3 so that the liquid level is on the same level as the reference position of embodiment 1, and the...

Embodiment 3

[0072] After the calibration method described in Example 2 is used to calibrate the photoelectric multi-channel communication pipe liquid level bridge deflection measurement device constructed in Example 1, the device and method for verifying and calibrating the calibration results, such as Image 6 As shown, prepare horizontal fixed plate 12, syringe, ball screw, stepper motor 16, pipe channel sealing interface 15, conduit 14; there is a cavity in the described tube channel sealing interface 15; light source 5, astigmatism plate 6, visual sensor 8. The digital processing unit and the power supply are the same as in Embodiment 1; the bottom of the liquid level observation tube 3 does not need to be connected to the horizontal connecting pipe 7, but to take over the channel sealing interface 15;

[0073] The method of verification and calibration includes the following steps:

[0074] S31, fix the position of the visual sensor at the reference position in embodiment 1, inject a...

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Abstract

The invention discloses a photoelectric multi-channel connecting pipe liquid level bridge deflection measuring device and method. The device includes a power supply, a light source, a liquid level observation tube, an astigmatism plate, a visual sensor, and a digital processing unit. The astigmatism plate has a light-transmitting sheet. The light transmittance of the light-transmitting sheet is not higher than 80%; the light emitted by the light source passes through the light-diffusing plate, the light-transmitting sheet, and the liquid level observation tube, and reaches the visual sensor. The visual sensor is connected with the digital processing unit to convert the collected liquid The bit image is transmitted to the digital processing unit; the method includes, calibration of the measuring device, verification of accuracy and calibration, measurement, and calibration, constructing a functional relationship between the edge coordinates of the image liquid level and the displacement difference, and when measuring, the visual sensor captures After the liquid level image of the liquid level observation tube is displayed, the liquid level image information is collected in real time and transmitted to the digital processing unit for processing and calculation to obtain the liquid level height information. The invention has higher edge detection success rate and better measurement accuracy.

Description

technical field [0001] The invention relates to the technical field of bridge detection and monitoring, in particular to a photoelectric multi-channel communication pipe liquid level bridge deflection measuring device and method. Background technique [0002] How to ensure the safe operation of bridges has always been a matter of great concern to management departments, and deflection is one of the important parameters for evaluating bridge safety conditions. Bridge deflection refers to the vertical deformation of the bridge at different positions under load, which directly reflects the overall vertical stiffness of the bridge structure. The measurement of the connecting pipe is to use the principle of the liquid level in the pipe to lay the connecting pipe along the beam body, and record the change of the liquid level in the connecting pipe through measurement, so as to convert the change of the bridge deflection, and the accurate measurement of the liquid level is the key....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M5/00G01F23/02
CPCG01M5/0008G01M5/0075G01F23/02
Inventor 倪文波刘昕宇晋智斌王雪梅
Owner SOUTHWEST JIAOTONG UNIV
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