Freight weight measurement apparatus and method using compensation pressure in accordance with temperature change of hydraulic fluid

A technology of temperature change and measuring device, applied in weighing temperature compensation device, measuring device, weighing equipment using fluid balance, etc. Measurement accuracy, the effect of improving measurement accuracy

Active Publication Date: 2012-11-07
DOOSAN IND VEHICLE
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0012] Therefore, the purpose of the present invention is to provide a method for eliminating the cumbersomeness of setting the pressure value each time due to the problem that the pressure changes with the temperature of the working oil in the lifting hydraulic cylinder. Cargo weight measuring device and method

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  • Freight weight measurement apparatus and method using compensation pressure in accordance with temperature change of hydraulic fluid
  • Freight weight measurement apparatus and method using compensation pressure in accordance with temperature change of hydraulic fluid
  • Freight weight measurement apparatus and method using compensation pressure in accordance with temperature change of hydraulic fluid

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Embodiment Construction

[0030] The following description refers to the drawings accompanied by a detailed description of a preferred embodiment of the invention. It should be noted that the same components in the drawings are denoted by the same symbols wherever possible. Specific specific matters appear in the following description, which are provided for a more comprehensive understanding of the present invention. Furthermore, in describing the present invention, when it is judged that the description of related known functions or configurations may unnecessarily obscure the gist of the present invention, detailed description thereof will be omitted.

[0031] First of all, the pressure of the working oil in the lifting hydraulic cylinder changes with the temperature Figure 4 Types shown vary.

[0032] Then, refer to Figure 5 The configuration of the cargo weight measuring device using the compensation pressure according to the temperature change of the working oil according to the embodiment o...

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Abstract

The present invention relates to a freight weight measurement apparatus and method using compensation pressure in accordance with a temperature change of a hydraulic fluid. To this end, the freight weight measurement apparatus of the present invention comprises: a lift cylinder; a pressure sensor which is mounted in a lift cylinder line, and measures the inside pressure of the lift cylinder; a temperature sensor which is mounted inside the lift cylinder, and senses the temperature of the hydraulic fluid of the lift cylinder; ; and a controller which compensates a pressure value in case of no load and a pressure value in case of the maximum load as preset pressure compensation values according to a change of the temperature of the hydraulic fluid sensed by the temperature sensor, sets the pressure values to change the pressure values, and measures the weight of freight by using the set pressure values.

Description

technical field [0001] The present invention relates to a cargo weight measuring device and method of a forklift, and more particularly to a cargo weight measuring device and method using compensation pressure according to temperature changes of working oil. Background technique [0002] Generally speaking, in a forklift, a pressure sensor is installed on the lifting cylinder line (Lift Cylinder Line) as a device for measuring the weight of the goods to be handled, and the pressure in the lifting hydraulic cylinder is used to measure the weight of the goods. [0003] In order to use the pressure value to determine the weight of the cargo, first determine the figure 1 The pressure value (Zero-Setting) P1 in the no-load state shown in (a) and the pressure value P2 in the maximum load state as shown in (b). At this time, the internal pressure of the hydraulic cylinder pipeline in the no-load state and the maximum load state can be as follows: figure 2 (a) shown. [0004] Ba...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01G5/04G01G19/10
CPCG01G19/083G01G5/04G01G19/10G01G23/48
Inventor 李义东
Owner DOOSAN IND VEHICLE
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