Device for extracting bit code of key based on displacement sensor

Abstract

The invention discloses a coding device for extracting key cutouts. By adopting a linear displacement sensor, the device of the invention has high stability, and can measure different types of key cutouts through the program control sensor without special customization. The service life is extremely long, and the most important thing is that its measurement accuracy is very high. The cost advantage of using communication based on RS485 interface is obvious, which can greatly reduce costs and adapt to large-scale production. In terms of domestic conditions, it can be widely compatible with industrial control PLCs, etc. The device has broad application prospects.

Description

Technical field [0001] The invention involves the field of lock equipment manufacturing technology, and especially involves a key tooth flower coding device. Background technique [0002] Bullet lock is a product with high accuracy, exquisite product appearance, large production batch, and high production efficiency requirements.Although some domestic lock -making equipment companies are related to key processing and lock -up processing machines, the automatic assembly of the bullet lock core is irreplaceable in China.The cost is expensive and can only be used for a single lock type. It cannot be suitable for a large number of domestic varieties and different standard lock types.Extracting key tooth flower coding is the first step of automatic assembly of the bullet lock core. Whether it can accurately collect the key to the tooth flower coding is the primary condition for the correct assembly of the marble lock core.China's patent "Extract the key tooth flower coding device, the...

AI Technical Summary

Problems solved by technology

The Chinese patent "A Device for Extracting Key Stain Codes, Publication No. CN101936092A" discloses a method of extracting key sequence codes using strain gauges and communicating through the CAN bus. However, when strain gauges are used to collect key sequence codes, the The strain gauge and its extended circuit are greatly affected by the environment such as temperature, resulting in poor stability. At the same time, the system error of the strain gauge is relatively large when it is measured, and the linearity error of the measurement is very large, reaching 2.76%, and the accuracy is very low; in addition, The sensitivity of the strain gauge is relatively low, and the mold of the strain gauge can only correspond to a specific model batch of keys. If you want to measure a different type of key, you can only re-produce the strain gauge

However, CAN bus-based communication requires a CAN controller and a CAN transceiver. The communication protocol is implemented by these chips. Since the price of an MCU with a CAN controller is not low, and an external CAN controller is more expensive, this will cause the device to The generation cost increases, which is not conducive to large-scale promotion

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