Inductive sensor for identifying and sorting coins and control method and device

Abstract

The invention discloses an inductive sensor for identifying and sorting coins and a control method and device, a transmission type excitation coil and a transmission type detection coil of a transmission type magnetic detection device adopt large coils, so a distribution surface of a magnetic field is large enough, and a reflection type magnetic detection device adopts a plurality of coil groups, so identification sensitivity is prevented from being reduced; the transmission type magnetic detection device is sleeved on a convex part in a fixed plate, and the reflection type magnetic detection device is fixedly arranged in a limiting wall of the shell, so position change among the coils is avoided, the inductive sensor can be obliquely arranged, the coins rolls over the sensor by utilizing the weight of the coin, and a coin conveying belt is omitted.

Description

technical field [0001] The invention relates to the technical field of counterfeit coin identification, in particular to an inductive sensor for counterfeit coin identification and sorting, a control method and a system. Background technique [0002] In a coin processing apparatus for discriminating and sorting coins, a coin discriminating and sorting inductance sensor for measuring magnetic properties of coins is used. Measure the magnetic properties of coins, such as determining the total thickness, coating thickness, diameter and material of coins, so as to sort coins and identify authenticity. [0003] A published patent document, a magnetic sensor for coin identification, has publication (publication) number 103258365A. In this patent document, a magnetic sensor for coin identification that measures changes in the magnetic field of both the transmissive type and the reflective type using four coils is disclosed. . In this sensor, a reflection-type excitation coil (pri...

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Problems solved by technology

[0004] However, in the above-mentioned patent documents, there are cases where variability occurs in the sensor characteristics due to manufacturing errors of the individual components constituting the coin identification and sorting inductive sensor and assembly errors when the magnetic sensor is assembled using a plurality of non-self-adhesive coils, There is also the use of permalloy as the magnetic core plate, which is expensive to process, and the opening leads to a small magnetic field distribution, resulting in reduced recognition sensitivity, and the installation is very limited. It can only be installed on a flat surface with a conveyor belt, which is not easy to install on an inclined surface. At the same time, it increases the conveyor belt. Cost and other issues

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