Method for acquiring quality information of discrete workshop on line based on radio frequency identification (RFID) technology

Abstract

The invention discloses a method for acquiring the quality information of a discrete workshop on line based on a radio frequency identification (RFID) technology. The method comprises the following steps of: (1) assigning operation tasks, and binding the operation tasks, materials and RFID tags; (2) initializing a quality state matrix; (3) by using a mobile RFID reader-writer, acquiring quality data particles at the tn-th moment; (4) according to the quality data particles at the tn-th moment, computing each quality index value; (5) according to the quality index values, updating corresponding elements in the quality state matrix; (6) according to elements of each block matrix in the quality state matrix, acquiring the quality information at the tn-th moment; and (7) executing the step (3), and starting acquiring the quality information at the t(n+1)-th moment. By adoption of the method, the quality information of the discrete workshop can be acquired on line, so the quality states of the materials during execution of the operation tasks in the discrete workshop are monitored in real time, wherein the quality states comprise quality conformance condition, quality throughput condition, quality stability condition and quality influence condition.

Description

technical field [0001] The invention relates to a method for online acquisition of discrete workshop quality information, in particular to an online acquisition method for discrete workshop quality information based on radio frequency identification (Radio Frequency IDentification, RFID) technology. Background technique [0002] Timely and effective acquisition of quality information is an important basis and key to realize the quality control and improvement of discrete workshops. At present, the main means of obtaining quality information are: paper cards, barcodes, sensors and RFID technology. The main advantages and disadvantages of each means are briefly described as follows: [0003] 1) The advantages of paper cards are low cost and simple implementation. The quality inspector only needs to manually fill in the quality inspection results on the paper card and pass the paper card to the next process. However, the paper card is a It is a non-real-time collection method ...

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Problems solved by technology

[0003] 1) The advantages of paper cards are low cost and simple implementation. The quality inspector only needs to manually fill in the quality inspection results on the paper card and pass the paper card to the next process. However, the paper card is a It is a non-real-time collection method (report can only be made after all processes are completed), and there are problems such as easy loss and defacement. Since it is completed by manual filling, it is easy to make mistakes and has low accuracy;

[0004] 2) The advantages of barcodes are fast input speed and high reliability (low bit error rate), but the data capacity of barcodes is limited and the environmental adaptability is poor. Like paper cards, there is also the problem of being defaced and affecting recognition. In addition , the barcode is not recyclable, so its long-term application cost is very considerable;

[0005] 3) The sensor is mainly deployed on the detection equipment, which has the advantages of high real-time degree (once the quality characteristics change, the sensor can collect data) and high data accuracy, but the cost of the sensor is high (the detection equipment is often expensive, and the majority of small and medium-sized Discrete manufacturing enterprises are usually unable to purchase), poor adaptability (testing equipment generally mainly detects a certain key quality characteristic, and obtains one of the key quality data, while other quality data cannot be obtained);

[0006] 4) The advantages of RFID are flexible deployment, various forms of collected data (both original data of quality inspection and data of quality inspection results can be collected), and the ability to accurately identify various key quality-affecting factors (such as personnel, equipment, suppliers, etc.) , Large data capacity, and RFID tags can write data according to needs, which is convenient for quality traceability after the event. The disadvantage of RFID is that the cost of tags is high (but if the tags are recycled, the long-term cost is lower than that of barcodes). There are many types of quality data and many attributes (generally including both quantitative data and count data), so the data must be effectively analyzed and processed in the future

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