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Height measuring device and method of hydraulic bracket

A technology of height measurement device and hydraulic support, which is applied in measurement device, height/level measurement, surveying and navigation, etc., can solve the problems of affecting the measurement value, the device cannot work normally, and the influence of temperature change is large, so as to increase the adaptability and ease of use, easy installation, debugging and maintenance, and ensure the effect of normal work

Pending Publication Date: 2018-06-15
BEIJING TIANMA INTELLIGENT CONTROL TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main problems of the laser ranging method are: 1. The laser emission window lens is covered by coal dust, and the lens pollution makes the device unable to work normally; 2. The target point is not fixed, and the position and attitude of the mounting frame change with the movement of the bracket structural components. The position of the target point will move in a large range. When it falls to different positions of the bracket, the distance measurement value will change greatly, and the measurement error will be too large.
The problems it faces are: 1. Indirect measurement, the system is complicated, and the accumulation of errors in each part causes inaccurate measurement; 2. The lengths of the structural components of various types of brackets are different, and they need to be calibrated separately
The problems it faces are: 1. It is greatly affected by temperature changes, the liquid expands with heat and contracts with cold, and the liquid level changes, which affects the measurement value; 2. The measurement error is large, and the error number reaches centimeters and becomes larger with the increase of the range

Method used

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  • Height measuring device and method of hydraulic bracket
  • Height measuring device and method of hydraulic bracket
  • Height measuring device and method of hydraulic bracket

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Embodiment 1

[0031] attached figure 1 A hydraulic support height measuring device according to an embodiment of the present invention is shown.

[0032] The height measuring device includes: a plumb weight 1, a height measuring pull rope 2, a tension sensor 3, a shaft encoder 4, a stepping motor 5, a microcontroller 6 and a quick-plug communication interface 7. Wherein the tension sensor 3, the shaft encoder 4, the stepping motor 5, and the microcontroller 6 are all located in the device housing, and the device is hoisted below the top beam of the hydraulic support. One end of the height-measuring stay cord 2 is connected to a stepper motor, which is controlled by different directions of rotation of the stepper motor to tighten or relax.

[0033] During the non-working state, most of the height-measuring stay cord 2 is also accommodated in the device housing. Under the action of gravity of the plumb weight 1, the other end of the height measuring stay rope 2 is located outside the height...

Embodiment 2

[0049] attached figure 2 A hydraulic support height measurement system and a method for measuring the actual height of the hydraulic support are shown. The problem to be solved is: when the fully mechanized mining face must adopt the down mining and upward mining processes due to the undulation of the coal seam, the support angle often deviates larger, as attached image 3 As shown, at present, except for the laser ranging method, other methods measure the distance between the hydraulic support and the plumb surface, that is, the plumb height L, or some height measurement methods measure the height between the plumb height L and the distance from the hydraulic pressure. There is a deviation between the actual height H of the support base and the vertical distance between the hydraulic support and the base, and when estimating the amount of coal mining or other calculations based on the height of coal mining, the parameter used should be the distance between the hydraulic top ...

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Abstract

The invention discloses a height measuring device and method of a hydraulic bracket. The height measuring device comprises a stepping motor, a shaft encoder, a height-measuring pull rope, a plumb bob,a tensioning sensor, a microcontroller, a fast-plugging communication port and the like. The height measuring device and method disclosed by the invention have the beneficial effects that when the height is measured, the microcontroller drives the stepping motor to control the winding and unwinding degree of the height-measuring pull rope under the action of gravity of the plumb bob, simultaneously the tensioning sensor monitors the tensioning force of the height-measuring pull rope, and judges that the plumb bob is contacted with a bracket base when detecting the change of the tensioning force; the microcontroller calculates the unwinding length according to the rotating angle fed back from the shaft encoder so as to obtain the measured height of the hydraulic bracket.

Description

technical field [0001] The invention relates to the field of automatic coal mining, in particular to an automatic measurement method, device and system for the height of a hydraulic support in a fully mechanized mining face. Background technique [0002] With the development of coal mining automation technology, the coal mining height of the fully mechanized mining face is an important parameter monitored by the automation system. Usually the coal mining height is the same as the height of the hydraulic support of the working face, and the detection of the coal mining height can be obtained by measuring the height of the support. Therefore, the height monitoring of the hydraulic support and the corresponding monitoring of the mining height of the fully mechanized mining face have become key technical issues in the field of fully mechanized mining automation . Due to the harsh environment of the fully mechanized mining face, the application of the traditional general-purpose...

Claims

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Application Information

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IPC IPC(8): G01C5/00
CPCG01C5/00
Inventor 王海军李森邢金领赵文生张德福李再峰高思伟谷敏永张守祥
Owner BEIJING TIANMA INTELLIGENT CONTROL TECH CO LTD
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