A magnetic detection device for valuable documents

Abstract

The invention relates to a magnetic detection device for valuable files, particularly to detection equipment used in financial settings to detect magnetic information of paper money. The magnetic detection device for the valuable files comprises a first support frame, a second support frame, a magnetic sensor and a pinch roller component, wherein the magnetic sensor is mounted on the first support frame; the pinch roller component is mounted on the second support frame; the pinch roller component and the magnetic sensor are arranged oppositely to form a valuable file transmission passage; the pinch roller component comprises a driving pinch roller which is mounted on the second support frame through a hinge; the hinge is provided with a fixed arm fixedly connected with the second support frame and a rotating arm in rotational connection with one end of the fixed arm; an elastic component is arranged between the fixed arm and one end of the rotating arm; the elastic component provides an elastic force for the driving pinch roller to press the magnetic sensor. The scheme effectively solves the problem that the set distance between the driving pinch roller and the magnetic sensor changes because the upper and lower support frames are not buckled in place and modules are assembled by error, so that the reliability of the whole detection device is improved.

Description

technical field [0001] The invention relates to a magnetic detection device for valuable documents, in particular to a detection device for detecting magnetic information of banknotes in financial settings. Background technique [0002] Existing automatic teller machines (Automatic Teller Machine, ATM) and banknote counters and other financial equipment all have authenticity identification and detection devices for banknotes, and mainly focus on the magnetic distribution of ink on the surface of banknotes and the magnetic coding of magnetic security threads. detection. However, at present, due to the weak magnetism of the magnetic ink on the surface of banknotes, the voltage amplitude directly detected is generally at the microvolt level (about 50), and it needs to be amplified by tens of thousands or even hundreds of thousands of times in the process of use. During the detection process, the small distance change between the sensitive detection element and the paper to be ...

AI Technical Summary

Problems solved by technology

[0004] 1. During the adjustment process, it is impossible to ensure that the two eccentric wheels at both ends of the driving wheel are adjusted synchronously. When one end is adjusted, the result will be affected by the ongoing adjustment action at the other end, and the coupling phenomenon of the distance between the two ends will appear, resulting in repeated adjustment work.

[0005] 2. During the handling and final assembly of the equipment module, due to the slight relative displacement of the two openable installation frames, the relative distance between the pressure wheel assembly and the magnetic sensor changes.

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