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Forklift load weight measuring system and method based on lifting hydraulic cylinder pressure measurement

A technology of weight measurement and hydraulic cylinder, applied in the field of forklift load measurement system based on pressure measurement of lifting hydraulic cylinder, can solve the problems of difficult engineering realization, complex three-phase asynchronous motor model, difficult realization of load weight, etc., so as to facilitate engineering realization. , low cost, and the effect of improving measurement accuracy

Active Publication Date: 2022-06-07
杭州远视智能科技有限公司
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Problems solved by technology

Generally, the lifting hydraulic system is driven by a three-phase asynchronous motor, and the model of the three-phase asynchronous motor is complex, and there are nonlinear phenomena such as temperature drift. It is difficult to obtain the load weight through modeling calculations. Therefore, this weighing method is only It is a theoretical solution, but it is difficult to realize it in engineering

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  • Forklift load weight measuring system and method based on lifting hydraulic cylinder pressure measurement
  • Forklift load weight measuring system and method based on lifting hydraulic cylinder pressure measurement
  • Forklift load weight measuring system and method based on lifting hydraulic cylinder pressure measurement

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Embodiment Construction

[0043] The present invention will be further described below in conjunction with the accompanying drawings and specific implementations.

[0044] like figure 1 The load weight measurement component 1 includes a pressure acquisition module 1, an analog-to-digital conversion module 2, a main controller module 3, a least squares fitting module 4, a CAN bus communication module 5, and a forklift instrument display module 6; pressure acquisition module 1 is connected to the main controller module 3 through the analog-to-digital conversion module 2, the main control module 3 is connected to the forklift instrument display module 6 through the CAN bus communication module 5, and the least squares fitting module 4 is an offline software module for The pressure-load relationship is obtained by calculation, and the pressure-load relationship is programmed into the main controller module 3 through software programming.

[0045] In the specific implementation, the main controller module ...

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Abstract

The invention discloses a forklift load weight measuring system and method based on lifting hydraulic cylinder pressure measurement. A lifting hydraulic cylinder hydraulic loop pressure analog quantity value is obtained through the pressure acquisition module, the pressure analog quantity value of the lifting hydraulic cylinder hydraulic loop is obtained through the pressure acquisition module, the pressure digital quantity value is sent to the main control module, and a pressure-load relational expression is obtained through a least square method in an offline calibration mode. The main controller module calculates the load weight according to the pressure digital quantity and a pressure-load relational expression, the CAN bus communication module communicates the load weight calculated by the main controller module to the forklift instrument display module, and the forklift instrument display module displays the load weight. The method has the advantages of being simple in principle, convenient to implement and free of influence on the structure and the appearance of the forklift, and the requirement of the high-goods-location forklift for load weight measurement can be well met.

Description

technical field [0001] The invention relates to a forklift load indirect measurement system and method, in particular to a forklift load measurement system and method based on lifting hydraulic cylinder pressure measurement. Background technique [0002] The principle of fork lift is as follows: the motor drives the hydraulic pump to drive the hydraulic cylinder to move, and then drives the fork to complete the lifting movement through the chain. According to the power transmission process of the forklift lifting system, corresponding sensors can be installed at the motor, transmission chain and truck respectively to realize the direct or indirect measurement of the load weight of the forklift. Several commonly used forklift load weight measurement schemes are as follows: [0003] (1) Direct end load weight measurement. This method realizes the direct measurement of the lifting load by directly installing the pressure sensor on the fork, which is a high-precision direct we...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F15B21/08F15B19/00B66F9/22
CPCF15B21/085F15B19/00B66F9/22Y02P90/02
Inventor 王班周卫华王卡袁彩哲李媛媛
Owner 杭州远视智能科技有限公司
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