Load detection chip for commodity safety

Abstract

The invention provides a load detection chip for commodity safety. The chip comprises a current control module which can adjust the current according to the demands of a load, a current monitoring module which can monitor the current passing through the load, and an output module. A load detection chip is configured to output a safety signal through the output module when the current exceeds a setthreshold. The load detection chip is small in size, light in weight, high in detection effect, stable in work, high in reliability and high in dynamic response and is used for commodity safety. Commodity safety states are confirmed through a current and voltage detection loop, so that supervision and protection of commodities are guaranteed, switching of corresponding detection circuits can be achieved, application in different scenes is achieved, and the application range is widened.

Description

technical field [0001] The invention relates to the field of commodity anti-theft, in particular to the circuit design in the commodity anti-theft device. Background technique [0002] Commodity anti-theft is an industry that has emerged with the development of society and technology. In the field of commodity anti-theft, there are many subdivisions, such as setting up anti-theft equipment at the entrance and exit of supermarkets or stores to detect whether commodities have been taken out of the place. This is usually EAS (also known as electronic article anti-theft system), which is one of the commodity security measures widely used in the large retail industry. Transmitter and receiver, when the transmitter sends out a signal with a specific frequency, the receiver receives this signal, and then generates a monitoring area, this anti-theft mode is usually called retail anti-theft or area anti-theft. [0003] Exhibit anti-theft is a subdivision field different from EAS. Ex...

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Problems solved by technology

[0006] However, with the development of science and technology, the continuous updating of products promotes the continuous development of the product anti-theft industry. After displaying products has become a sales model accepted by more and more people, the demand for other aspects besides security is also increasing. More and more, for example, the traditional three wires need to be customized, and ordinary wires cannot be used directly. Therefore, merchants who display and sell need to separately configure this anti-theft cable (also called a security cable, that is, it can be used to prevent theft or product safety). The cable that plays a certain role), and the anti-theft cable is usually connected to the product and the anti-theft device. Since the product is constantly being experienced, the cable will naturally be bent and twisted continuously with the experience of the product, so No matter how strong the quality of the cable is, its life is very short, and the signal cable is particularly easy to be damaged. Once the signal cable is damaged, even if the charging wire is still intact, the whole cable needs to be replaced. For the increasingly popular commodity anti-theft industry, More and more merchants hope to reduce the cost of anti-theft exhibits to increase sales profits; in the existing technology, there are also attempts to use ordinary charging cables for detection, such as judging whether the product is safe based on the on-off of the current, and using ordinary charging cables to detect whether the product is safe. Theoretically speaking, it seems that it can also be realized. For example, the circuit board, sensor and alarm in the product and the warning device are connected to form an alarm loop through an ordinary charging cable. The circuit board can control whether the charging cable or the alarm loop There is a current flowing through to detect whether the product is in a safe state. If the charging current always exists, it means that the product is always connected to the warning device and is in a safe state. If the charging current disappears, there may be theft risk; in fact, in practice, this method of current detection needs to be realized through a functional circuit composed of a large number of electronic devices. Devices require PCB space support, which will result in a larger overall equipment, and on the other hand, the cost of the solution will also increase

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