A magnetic induction character wheel counter

Abstract

The invention relates to the field of data identification in measurement technology, in particular to a magnetic induction word wheel counter. A character wheel group, the character wheel group comprises two or more coaxially arranged character wheels, and adjacent character wheels are connected by a carry gear; The character wheel group comprises at least one character wheel provided with a ferromagnetic substance; The ferromagnetic material is arranged on the character wheel where at least one number is located; the magnetic induction unit corresponds to the character wheel provided with the ferromagnetic material and is arranged on the circuit board, including a U-shaped magnetic block and A magnetic induction chip arranged in the U-shaped notch of the magnetic block; when the ferromagnetic material rotating with the character wheel approaches the corresponding magnetic block, the magnetic field of the magnetic block changes, and the magnetic induction chip is used for sensing the magnetic field of the magnetic block. The magnetic field changes and outputs count pulses to the circuit board. The installation process of the technical solution provided by the present invention can realize a greater degree of automation, and the magnetic induction chip can sense the magnetic field change of the U-shaped magnetic block more stably and accurately, which increases the stability and service life of the counting device.

Description

technical field [0001] The invention relates to the field of data identification in measurement technology, in particular to a magnetic induction character wheel counter. Background technique [0002] The character wheel counting device in the prior art mostly adopts the magnetic material installed on the character wheel, and the electronic pulse counting is carried out through the dry reed switch externally. Such products have two disadvantages: 1. The reed tube pin shaping during installation and welding can easily cause micro-leakage of the vacuum glass tube of the reed tube, and this micro-leakage is not easy to find, which leads to the use of micro-leakage reed switches The character wheel counting device is inaccurate after a period of time. 2. The reed switch cannot be directly automated during the shaping and welding process, and manual intervention is required, so the production efficiency is not high. Contents of the invention [0003] The purpose of the presen...

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Problems solved by technology

[0003] The purpose of the present invention is to overcome the problem of excessive manual intervention in the installation process caused by the use of reed switches for word wheel counting, and the problem of inaccurate measurement due to micro-leakage, and to provide a magnetic induction chip for counting, thereby avoiding the The production process of the character wheel counting device requires too much manual intervention and the magnetic induction character wheel counter that does not cause inaccurate measurement due to micro-leakage of the reed switch: In order to achieve the above purpose, the technical solution adopted by the present invention is:

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