On-line laser coding and weighing is to put the marked object on the platform of electronic scale, and the laser is concentrated on the surface of the marked object with high energy density. By burning and etching, the substances on the surface of the marked object are vaporized, and by controlling the effective displacement of the laser beam, patterns or characters can be accurately burned.

The on-line laser coding and weighing control unit can control the light output of the laser and the angular deflection of the vibrating mirror, and can collect the speed of the production line in real time to generate a speed error compensation signal. The weighing operation unit is responsible for the man-machine interaction between the system and the operator. Through the weighing operation unit, the operator can compile user-defined codes and control the operation and stop of the system. After the weighing operation unit accepts the relevant operation of the operator, it will be forwarded to the main control unit for execution.

Coding system In the field of flexible packaging coding, ink roller coding machine and ribbon coding machine still occupy a large market share, both of which occupy a large market with their low prices, but they are difficult to meet the market demand of flexible packaging manufacturers for printing variable information signs. Therefore, thermal transfer coding machines are gradually sought after and favored by the market and production enterprises. In the market application, the weighing system can not only meet the requirements of adding thermal transfer equipment to the coating, bag making, rewinding, cutting and shaping links after printing in the printing factory to realize the coding of the product packaging, but also add thermal transfer equipment to the automatic packaging (filling) equipment of the production enterprise to realize the coding of the product packaging.

The coding system mainly codes the products at all levels, and synchronizes the relational data to the data integration and sharing system. Through the system, the company's products can truly, timely, accurately and effectively record the information in the process of production and operation, so that the product information can be recorded, traced, controlled, recalled and inquired; At the same time, through the unique identification code given to the product, it realizes various marketing management functions such as product weighing, anti-counterfeiting, anti-smuggling, quality traceability, membership points, code scanning red envelopes, lottery activities and so on.

The main functional modules of the coding system include user management module, file receiving module, one-dimensional bar code printing module, two-dimensional code identification function, code scanning gun detection function and bar code management function. Drawing lessons from the "one thing, one code" to be realized in the actual pharmaceutical production process, this paper simulates the functions of bar code information collection, bar code generation and correlation, machine vision identification and detection of two-dimensional code and final bar code management in the actual production process of weighing.

On-line coding and weighing system takes weighing technology as the core, two-dimensional code or RFID as the data carrier, and combines automatic identification and automatic control system to dynamically code and weigh the products in the packaging process, endow each product with a unique "ID card", and at the same time complete the binding of production factor information of products, and realize closed-loop data association at different levels such as single product, box and tray according to the packaging level, providing data for subsequent product weighing, tracking, flow control and interactive marketing.

The measurement and coding system runs through all links of the whole product industry chain. Through low-cost production line transformation, the product is given a unique identity code and bound with product information, and multi-level closed-loop association is carried out, such as single product-box-consignment data. Through weighing and PDA scanning code when warehousing, agent/distributor receiving code scanning, terminal store receiving code scanning, traceability/anti-counterfeiting scanning code after purchase by consumers, market inspectors scanning code and other behaviors, we can judge whether the products are in the process of goods smuggling. If there is any goods smuggling, the system will send early warning information to enterprise managers in time to facilitate timely market decision-making.

The core part of the coding weighing system, data acquisition and data association, is constructed according to the principle of finite automatic state machine, using the post-association mode, which can ensure that the product supervision code of weighing is completely consistent with the associated data uploaded to the electronic supervision network. According to the site and environment of each product production line, as well as the process and operation requirements of packaging and weighing, the collection and association of the supervision code of the products in the network, the mixed mode of automatic collection and manual collection (referred to as the automatic line mode).

The weighing system realizes the automatic control of the whole system through the electronic scale, the weight is picked up through the pressure weighing module, and the weight signal is picked up for the transmission process and control requirements, including control scanning, coding equipment, printing equipment and other linkage work.