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Non-contact type magnet weighing sensor

A load cell, non-contact technology, applied in the field of sensors, can solve problems such as poor output voltage linearity, poor stability and reliability, output voltage susceptible to temperature, power supply fluctuations or external interference, etc., to achieve cost-effective High performance, stable and reliable performance, and strong versatility

Active Publication Date: 2010-07-21
G TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The output voltage linearity of this traditional inductive load cell is not very good, and the output voltage is easily affected by temperature, power fluctuation or external interference, so the stability and reliability of this traditional inductive load cell are very poor

Method used

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  • Non-contact type magnet weighing sensor
  • Non-contact type magnet weighing sensor
  • Non-contact type magnet weighing sensor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0015] refer to figure 1 , a non-contact magnetic load cell, including a magnetic sensor 1 and a magnet 4, the magnet 4 is vertically installed relative to the magnetic sensor 1 and generates an induced magnetic field, and the magnetic sensor 1 senses the magnet 4 by measuring the magnetic flux change and The relative displacement of the magnetic sensor 1 changes. The output end of the magnetic sensor 1 is connected to the signal amplification processing circuit 3 , and the input ends of the magnetic sensitive sensor 1 and the signal amplification processing circuit 3 are both connected to the power supply circuit 2 .

[0016] further reference figure 2 , the magnetic sensor 1 is a magnetic transistor Q1.

[0017] Further, the magnetic sensitive sensor 1 and the signal amplification processing circuit 3 include a magnetic sensitive transistor Q1, an integrated operational amplifier IC1, a capacitor C9, a resistor R1R2R3 and an adjustable resistor VR1, the emitter of the magn...

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PUM

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Abstract

The invention discloses a non-contact type magnet weighing sensor which comprises a magnetic-sensing sensor and a magnet. The magnet is vertically arranged relative to the magnetic-sensing sensor and generates an induction magnetic field. The magnetic-sensing sensor senses the relative displacement change between the magnet and the magnetic-sensing sensor through measuring the magnetic flux change. The output end of the magnetic-sensing sensor is connected with a signal-amplifying processing circuit. The input ends of the magnetic-sensing sensor and the signal-amplifying processing circuit are connected with a power supply circuit. The invention provides an analogue amount signal or on-off amount signal on the elevator car empty loading, full loading or overloading for an elevator system, well maintains the linear relationship of the distance change between the output voltage and an induced object, not only has stable and reliable property, but also has high measuring precision, strong university and high performance-price ratio. The magnet weighing sensor with good property can be widely applied to the elevator industry.

Description

technical field [0001] The invention relates to a sensor, in particular to a non-contact magnet type weighing sensor. Background technique [0002] The load cells used in traditional elevators are all inductive load cells. The change in the inductance of the inductance device is caused by the change of the position of the iron core and the inductance device, and then the change in inductance is converted into a voltage or current signal through an amplifier circuit. , through the measurement of the voltage or current signal, it can sense whether the elevator car is empty, full or overloaded. The output voltage linearity of this traditional inductive load cell is not very good, and the output voltage is easily affected by temperature, power fluctuation or external interference, so the stability and reliability of this traditional inductive load cell are very poor. Contents of the invention [0003] In order to solve the above-mentioned technical problems, the object of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01G7/02
Inventor 钟长征亚力山大·克莱恩
Owner G TECH CO LTD