The application of intelligent electronic scales in the spring washer automatic packaging line + Chen Tangxian, Du Xia, College of Electrical and Information Technology, Hubei Yichang current method, gives the working principle of the system and the main process of the software. It is better to prove the quality of spring washer packaging. 1Overview In modern enterprises, the use of automatic measuring equipment is becoming more and more important. Especially in the production of quasi-secondary enterprises, accurate and rapid online measurement of material weight is essential. The smart electric scale introduced in this paper is the device applied to the spring washer packaging line of a standard parts factory. Structure meaning 14SRAM62645 parallel port 82556 material warehouse 7 slow add port 2 system hardware composition The system by the resistance strain gauge pressure sensor 7 output material weight signal, through 1 Jiang 7650 amplification and then sent to the upper 1 70 converter, 0 031 processing, control the various mechanical actions of the scale body according to the speed requirement of the packaging.
2.1 Sensor and amplifying circuit sensor The 8 to 37 produced by Shanghai Huadong Electronic Instrument Factory has a resistance of 120 ohms, which can better guarantee the packaging precision. 2 amplifier adopts chopper-stabilized zero op amp 1jiang 7650. The input resistance of its non-inverting and inverting terminals is said to be 1001. The voltage-dividing resistor and feedback resistor at the same-phase end are both 1001. At this time, the amplification factor is hidden, and the 6-resistance is said to be 7 resistance 100 into 22 converter, with 0 select 12-bit double integral 7109 It has the advantages of high precision, low noise and low price. An external 12-volume 1 oscillating body is divided by 59 to produce 2051, the clock frequency. This is about 25 conversions per second. It can meet the requirements of the weighing cycle of the hopper type electronic scale every second.
In order to simplify the system hardware, the cost reduction port adopts a high performance device. Number, memory is divided into parts. That is to say, the 8031 ​​tablet must be connected to the core factory 8255, and the 1st and the night expansion of the 81626 is not protected by the factory 1 battery. After the expansion of the 8255, the input and output signals are optically isolated. At the same time, there are 8 circuits 1 to enhance the anti-interference ability of the system. Such as 3 system software This system program is about 3.8 in the 2764 chip, the main process 3. The program is divided into thousands of modules initialization module sampling module data processing module key control module. This module is called by the main control module to control the weighing process to start the initialization module first, if it does not enter the school. The system enters the waiting state and queries the confirmation signal that the discharge door is closed. If the discharge door is closed, the system will start measuring the weight of the packaged items in the weighing bucket from 981 to the set value. The intelligent electric wide scale opens the quick-apply door to close the slow-filling port, and if the fast feeding is more than 98, the intelligent electronic scale closes the quick-filling opening to open the slow-filling port, and implements the slow-adding decision-feeding. If the weight of the packaged item in the bucket is equal to the set value , then close the quick add and slow add, stop feeding, waiting for discharge. 4 is the packaging process timing 1 fast plus 2 slow 3 cut material 4 conclusions using 8031 ​​to achieve intelligent electronic scales, with low cost, good control and simple control. The application of the intelligent electronic scale in the spring washer packaging system greatly improves the packaging quality and work efficiency of the yellow pad, and at the same time reduces the labor intensity of the workers, the economic and social benefits are remarkable, and the application value is better.
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