With the promotion of automated production lines and the improvement of production processes, the development of checkweighers
has become more and more rapid.
In recent years, due to the rapid growth of the material industry, the sorting process requirements have been greatly improved, which firstly drives the demand for check weighers.
Not only the requirements for check-weighing speed, check-weighing accuracy, sorting stages, etc. have been greatly improved, but also with the needs of modern big data, it is also necessary to configure various identification devices, communication capabilities, data management systems, traceability systems, etc. Analog signal processing is hard to do.
We classify the sorting and check weighing system into the check weighing system. The so-called check weighing is only to judge the qualified check weighing of the material of one item number, while sorting is to screen and classify the materials of N item numbers through the weight interval. come out. So it works exactly the same.
1. Weighing system
The weighing system is the most overlooked part. Most of the checkweigher manufacturers are not professional scale manufacturers, and they disdain the understanding of the weighing structure. In fact, many of the problems come from the weighing system in the first place.
Weighing instrument manufacturers do not understand the measurement nature of check weighers, and often regard static weighing instruments as dynamic measurement, especially when check weighers are loaded by high-speed transmission systems.
Many problems are also caused by the wrong selection of sensors, resulting in the inability to achieve high-precision, high-speed signal correspondence, thus sending delayed and linear accuracy deviation error signals.
2. Transport system
The traditional conveying system is driven by a single-speed motor, and modern variable-speed frequency conversion devices are used. Frequency conversion mainly produces electromagnetic interference, and many sensor signals and signal processing are seriously distorted at high frequencies, which is another key point of the checkweigher problem.
3. Signal processing control system
The sensor signal processing control system can be said to be the soul core of the checkweigher. Traditional check weighers do not have a dedicated instrument controller. At that time, the dynamic weighing was still in the so-called dynamic weighing degree of animals, which was not the weighing signal processing of the real object motion state, but the data averaging processing in the later period.
The most representative special-purpose dynamic check weighing instrument in the early days was Unipulse's F850-X1, which was mainly used in the Chinese tire industry. Its design and production truly represented Unipulse's superb pulse signal processing capabilities, and all instrument engineers were amazed.
In the same period, the domestic application of check weighing, mainly in the pharmaceutical industry, is basically a processing method in which the so-called automation equipment manufacturers use analog signal transmitters through PLC and text screens. With the popularization of frequency conversion technology, the check weighing speed has been greatly improved, which is obviously questioned by non-professional users.
4. Auxiliary systems
The traditional modes of auxiliary systems include photoelectric recognition trigger control systems, modern visual recognition intelligent management and control systems, and multi-level sorting (rejection) control systems.
5. Data management traceability system
The data management traceability system is to integrate all the upstream and downstream subsystems of the check weighing system, and can be integrated into other management systems of the enterprise, such as ERP and financial management systems, to make the enterprise management data more real-time and real (to prevent fraud cheating) to achieve real big data management.
The above describes the composition of the checkweigher, each part of the checkweigher is essential. If you are planning to purchase a checkweigher, please contact us.
Syndar is a professional custom check weighing and monitoring systems manufacturer
and supplier. It has many years of history. Since the industrialization of food in 1965, food weighing inspection has been an important topic for major manufacturers. We have cultivated advanced technology and field capabilities in quality inspection, and we have co-created and developed with corporate customers in the direction of world-class quality and safety assurance solutions.