lift limiter

A limiter and processor technology, applied in the direction of load hanging components, safety devices, transportation and packaging, etc., can solve the problems of inconvenient observation of load values, errors, resistance temperature rise detection results, etc., to reduce factory debugging time, reduce Small manual error, simple operation and easy-to-understand effect

Active Publication Date: 2018-02-09
中水三立数据技术股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the use of analog adjustment, the temperature rise of the resistance will cause a certain error in the detection results
In addition, the existing lifting limiter generally adopts an integrated design, and the display of the load value is not easy to observe

Method used

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Embodiment Construction

[0024] Below in conjunction with embodiment the present invention is further elaborated.

[0025] Such as figure 1 , figure 2 As shown: the present invention provides a lifting limiter, including a host 1 and an external meter 2, and the communication between the host 1 and the external meter 2 is carried out through the RS485 bus; the host 1 includes a first processor 1-1, the first The 2nd, 3rd, 4th pins of the processor 1-1 are connected with the first communication interface 1-2, the 1st, 17th, 18th, 19th pins are connected with the serial interface 1-12, and the 15th pins are connected through the optocoupler 1-10 It is connected with the relay 1-11, and the 23rd pin is connected with the differential amplifier circuit 1-13; the input end of the differential amplifier circuit 1-13 is electrically connected with the pressure sensor 1-7; the external meter 2 includes a second processor 2-1, the 2nd, 3rd, and 12th pins of the second processor 2-1 are connected to the seco...

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Abstract

The present invention provides a lifting limiter, which includes a host and an external meter, and the host and the external meter communicate through an RS485 bus; the host includes a first processor, and the first processor communicates with the first communication interface, The serial interface is interactively connected, the first processor is electrically connected with the relay, and the pressure sensor through a differential amplifier circuit; the external meter includes a second processor, and the second processor is interactively connected with the second communication interface. The two processors are connected with buttons and digital tube display screens; the two ends of the RS485 bus are respectively connected with the first communication interface and the second communication interface. In the present invention, the main unit and the external meter used for displaying and alarming are designed separately, and the remote communication is realized through the RS485 bus, so that the external meter and the main unit can be separated and installed at a long distance, reducing the interference of the environment on the pressure sensor signal, and accurately measuring Crane loads, and protect the crane well.

Description

technical field [0001] The invention relates to the technical field of water conservancy monitoring automation, in particular to a lifting limiter. Background technique [0002] Lifting weight limiter, also known as overload protector, is a safety protection device for hoisting machinery, which can be used on bridge cranes, door cranes and other crane equipment for load measurement and overload protection of cranes during the process of lifting goods. device. Lifting weight limiter is mainly composed of two parts: a resistance strain gauge sensor and an electrical controller. It has functions such as sound and light alarm, cutting off the power supply of the hoisting circuit of the crane, and digital display of weight. [0003] The lifting limiter has the function of corresponding to various range sensors. The existing lifting limiter mostly adopts the analog method, and realizes this goal by adjusting the potentiometer. Due to the use of analog adjustment, the temperature...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B66C15/06
Inventor 李兵褚铭任传胜丁云生常忠陈腊武
Owner 中水三立数据技术股份有限公司
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