Digital type lifting weight measurement-control recorder
A recorder and lifting weight technology, which is applied in the direction of load hanging components, transportation and packaging, safety devices, etc., can solve problems such as signal interference, safety accidents, and the loss of overload protection functions of devices, so as to reduce electrical interference and improve accuracy and reliability effects
Inactive Publication Date: 2012-08-15
宜兴市三维电气制造有限公司
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[0003] The lifting weight limiter for cranes currently on the market mainly amplifies the millivolt signal output by the sensor installed under the force measuring point of the crane by 100 to 200 times through the sensor preamplifier, and then transmits it to the control instrument for voltage signal collection and processing. Then compare the processed signal with the standard signal. When the collected signal is larger than the standard signal in a certain proportion, the control instrument will output a set of passive switch signal to control the overload lifting operation of the crane, thereby preventing the crane from overloaded work
[0004] This lifting weight limiter mainly has three disadvantages. First, the amplified load cell signal usually has a long signal transmission distance to the control instrument, and the voltage signal line is usually connected with other signal lines and The power lines are routed together, so that various interferences will penetrate into the voltage signal, making it difficult to improve the stability and accuracy of the device, and some devices even cannot work properly due to signal interference; second, the signal transmission line When a disconnection occurs, if the floating voltage of the signal is within the normal signal voltage range, the device will lose its overload protection function, and even lead to a key safety accident; finally, the device does not have the ability to record, count, and store working data. And export function, once an accident caused by overload occurs, the supervisor and accident investigation department will have no evidence to check
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[0015] Such as figure 1 , a kind of digital weight measuring and controlling recorder of the present invention, comprises load cell digitization conversion module, keyboard and display module, sound and light alarm and control output module, data storage module, USB data download module and central processing unit, each equipment With the central processing unit as the core and connected to it, each module is specifically:
[0016] 1. Digital conversion module of load cell ( figure 2 ): This module is composed of the digital conversion module of the force sensor, which is mainly composed of RCL type passive filter, measurement and control recorder, A / D converter, CPU, RS485 interface and interface, and protection circuit. The force sensor is sequentially passed through the RCL Type passive filter and A / D converter are connected to the CPU, the other port of the A / D converter is connected to the force sensor, the CPU is also connected to the RS485 interface and the power supp...
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The invention discloses a digital type lifting weight measurement-control recorder comprising a force measurement sensor digitalized conversion module, a keyboard and display module, a sound-light alarm and control output module, a data storage module, a USB (Universal Serial Bus) data downloading module and a central processing unit, wherein all devices take the central processing unit as a core and are connected with the central processing unit. According to the digital type lifting weight measurement-control recorder, force measurement sensor built-in signal acquisition, digital filtering, precision correction and long-line transmission driving are adopted, therefore electrical disturbance of signals in transmission is greatly reduced and the precision and the reliability of equipment are improved. Each sensor has respective ID (identity), so that state analysis and networking of multiple sensors are facilitated. The digital type lifting weight measurement-control recorder has functions of storing and extracting various parameters of lifting states of a crane and provides very powerful original analysis data for an equipment monitoring department in service life predication, safety assessment, risk evaluation, emergency rescue, accident analysis of crane equipment, and the like.
Description
[0001] technical field [0002] The invention relates to an electronic recording device, in particular to a lifting weight measurement and control recorder. Background technique [0003] The lifting weight limiter for cranes currently on the market mainly amplifies the millivolt signal output by the sensor installed under the force measuring point of the crane by 100 to 200 times through the sensor preamplifier, and then transmits it to the control instrument for voltage signal collection and processing. Then compare the processed signal with the standard signal. When the collected signal is larger than the standard signal in a certain proportion, the control instrument will output a set of passive switch signal to control the overload lifting operation of the crane, thereby preventing the crane from Work overload. [0004] This lifting weight limiter mainly has three disadvantages. First, the amplified load cell signal usually has a long signal transmission distance to th...
Claims
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IPC IPC(8): B66C13/16B66C15/06
Inventor蒋晓栋张宏张益平韩洪祥
Owner宜兴市三维电气制造有限公司