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Hardware description of each system of online automatic checkweigher

Update:29-11-2020

Summary:

Online checkweigher, also known as automatic weighing m […]

Online checkweigher, also known as automatic weighing machine, sorting scale, weight identification scale, weight grading scale, etc.
On-line automatic checkweigher is a kind of checkweighing equipment for medium and low speed and high precision packaging production lines. It can be integrated with various packaging production lines and conveying systems. It is mainly used for online inspection of product weight and whether there are missing parts or products in the package. Weight archive. The principle is to let the packaged products pass through the weighing platform at a certain speed, measure the weight value of the product during the conveying process, and remove the unqualified products by the actuator.

　The hardware system is the physical basis of the entire measurement and control system. According to the requirements of the measurement and control system, the hardware system is built and optimized. The hardware of the online automatic checkweigher system mainly includes the following parts: computer, signal detection part, signal conditioning circuit, data acquisition card part, control part and actuator.
　　 1. Computer: The center of data collection, data management and control decision-making of the entire measurement and control system.
　　2. Signal conditioning circuit: amplify, excite, linearize, isolate and filter the signal.
　　3. Signal detection part: mainly refers to two pressure sensors with higher accuracy. They are responsible for real-time conversion of the quality signal of dynamic weighing, and the electrical signal obtained after conversion is transmitted to the data acquisition board part.
　　4. Weighing display controller: The computer performs processing according to the control setting parameters, obtains the control result through a certain control algorithm, and transmits the control result to the actuator. The weighing display control instrument can display the gross weight, net weight, the last weighing value, the difference between the last weighing value and the set nominal value. It can also display the total number of weighed pieces, the number of underweight pieces, the number of overweight pieces, and the number of qualified products. The display controller can also send a variety of statistical information, and can connect useful information to the management computer through the communication interface or print out reports through a printer.
5. Data acquisition card part: Including data acquisition card and its supporting equipment. The collected data is converted by A/D and transferred to the computer for further analysis and processing; then the control result output by the computer is converted through D/A and output Give the control part.
6. Execution rejection device: According to the packaging form and characteristics of the inspected items, the rejection device can be divided into multiple methods such as pushing out, tipping and dropping, and transporting. The actuator will take corresponding actions according to the control results to timely remove the packaging that does not meet the quality standards. product.
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