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A hydraulic scale and its weighing method

A scale and hydraulic technology, applied in the field of hydraulic scale and its weighing, can solve the problems of large error and low sensitivity, and achieve the effect of reducing intermediate conversion links, high sensitivity, and reducing cumulative error.

Active Publication Date: 2021-05-25
SICHUAN VOCATIONAL & TECHN COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the defects of large errors and low sensitivity in the scale measurement process existing in the prior art, the present invention discloses a hydraulic scale and its weighing method. The present invention reflects the weight of an object by using the time for hydraulic oil to pass through the gap. Reduce the intermediate conversion link of the weight signal, improve the measurement accuracy, and also have the advantages of high sensitivity

Method used

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Embodiment 1

[0030] This embodiment, as the basic embodiment of the present invention, discloses a hydraulic scale, the specific structure is as follows figure 1 and figure 2 As shown, it includes a weighing body 1, which is provided with a pallet for carrying heavy objects; a hydraulic cylinder and an oil tank 4 are arranged in the weighing body 1, and the hydraulic cylinder is connected with the oil tank 4 through an oil delivery pipe 3, wherein the hydraulic pressure A hydraulic pump 7 is connected to the oil delivery pipe 3 on the inlet side of the cylinder, and the hydraulic pump 7 is connected to the drive motor 8. A shut-off valve 9 is arranged on the oil delivery pipe 3 on the outlet side of the hydraulic cylinder. There is a controller 6, and the weighing body 1 is also provided with a left bracket 14, the top and the bottom of the left bracket 14 are respectively provided with a first travel switch 11 and a second travel switch 12, and the input end of the controller 6 is connec...

Embodiment 2

[0032] As the best embodiment of the present invention, this embodiment discloses a hydraulic scale, the specific structure is as follows figure 1 and figure 2 As shown, it includes a weighing body 1, the weighing body 1 is provided with a pallet 2 for loading heavy objects; a hydraulic cylinder and a fuel tank 4 are arranged in the weighing body 1, and the hydraulic cylinder is connected with the fuel tank 4 through a fuel delivery pipe 3, A hydraulic pump 7 is connected to the oil delivery pipe 3 on the inlet side of the hydraulic cylinder, and the hydraulic pump 7 is connected to the drive motor 8, and a one-way valve 18 that opens to the hydraulic cylinder side is also arranged between the hydraulic pump 8 and the hydraulic cylinder. , the oil delivery pipe 3 on the outlet side of the hydraulic cylinder is provided with a shut-off valve 9, the said scale body 1 is also provided with a controller 6, the said scale body 1 is provided with a left bracket 14 and a right brack...

Embodiment 3

[0034] This embodiment, as another preferred embodiment of the present invention, discloses a weighing method of a hydraulic scale, which specifically includes the following steps:

[0035] A. Close the shut-off valve, start the drive motor and hydraulic pump to fill the hydraulic cylinder with hydraulic oil through the controller; after filling the hydraulic cylinder with sufficient hydraulic oil, control the drive motor to stop through the proximity switch and the controller;

[0036] B. Place the heavy object to be measured on the tray, and then start weighing through the controller, and the controller opens the stop valve;

[0037] C. After the piston rod moves to the bottom of the hydraulic cylinder, read the weight data of the item through the display screen;

[0038]D. After reading the data, take off the heavy object to be measured, and end the measurement through the controller. The controller closes the shut-off valve, and turns on the hydraulic pump to refill the hy...

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Abstract

The invention discloses a hydraulic scale and a weighing method thereof, comprising a weighing body and a tray, wherein a hydraulic cylinder and an oil tank connected to each other are arranged in the weighing body, and a shut-off valve is arranged on the oil delivery pipe at the outlet end of the hydraulic cylinder. A hydraulic pump and a drive motor are arranged on the oil delivery pipe on the inlet side of the hydraulic cylinder, and the shut-off valve and the drive motor are connected to the controller arranged on the weighing body; the gravity of the heavy object to be measured in the present invention directly acts on the hydraulic cylinder, And the weight is detected by directly detecting the movement time of the hydraulic oil in the hydraulic cylinder. There are few intermediate conversion links, which greatly reduces the cumulative error and improves the measurement accuracy; at the same time, the hydraulic components have high sensitivity to changes in external pressure. Thereby greatly improving the sensitivity and accuracy of the measuring device.

Description

technical field [0001] The invention relates to the technical field of measuring tools, in particular to a hydraulic scale and a weighing method thereof. Background technique [0002] At present, electronic scales have been more and more widely used in all aspects of people's production and life. The working principle of the existing electronic scales is: when an object is placed on the weighing pan, pressure is applied to the sensor, and the sensor is deformed, so that the impedance Change, and at the same time make the excitation voltage change, and output a changed analog signal. The signal is amplified by the amplifier circuit and output to the analog-to-digital converter to be converted into a digital signal that is easy to process and output to the CPU for operation and control. The CPU outputs calculation results to the display according to keyboard commands and programs. The process is: external force→sensor→OP amplification→A / D conversion→CPU→display driver→displa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01G5/04
CPCG01G5/04
Inventor 鲜小红陈文建张凯夏宝林
Owner SICHUAN VOCATIONAL & TECHN COLLEGE
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