Vibrating wire type sensor for weight sensing
A vibrating wire sensor and sensitive film technology, applied in the sensor field, can solve the problems of easy corrosion of the fixed end of the steel string, distortion of the bridge voltage amplitude, signal zero drift, etc., and achieve stable electrical reading without drift and high tensile strength. , the effect of anti-noise interference
Inactive Publication Date: 2019-11-05
BEIJING HUATEKELIN TECH
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Problems solved by technology
[0002] Existing weighing sensors for measuring the weight of the vehicle mostly use impedance bridge type force measurement technology or other impedance type sensors, impedance bridge type force measurement technology. The balanced bridge pressure changes with the measured weight. The bridge pressure is amplified and transmitted to the displayed signal, which is the measured weight. The disadvantages are: the value of the impedance element will change due to the external temperature and humidity, and the amplitude of the bridge pressure will vary with the line along the route. Distorted due to resistance and noise interference
[0003] Some companies use steel string sensors to measure force. This technology uses steel strings to measure the weight of the vehicle, and uses excitation coils to excite the steel strings to vibrate. The vibration frequency reflects the force on the steel strings. The disadvantages are: due to steel The string is a magnetic metal, which will be absorbed by electromagnetic induction, so that the steel string can only oscillate intermittently, and the signal generated is an intermittent attenuating electric wave, and there is an error in the measurement, and the fixed end of the steel string is easy to corrode, and the signal will drift zero.
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[0025] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. The components of the embodiments of the invention generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations. Accordingly, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without cre...
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The invention relates to a vibrating wire type sensor for weight sensing. The sensor comprises a casing, a sensitive diaphragm is arranged at the bottom of the casing, a connecting base is arranged onthe top of the sensitive diaphragm, a lower connecting rod is connected to the top of the connecting base, a tungsten filament lower fixing chuck is arranged on the top of the lower connecting rod, an upper connecting rod penetrates through the center of a bearing beam, a trimming nut is arranged on the top of the upper connecting rod, a tungsten filament upper fixing chuck is arranged on the topof the upper connecting rod, a tungsten filament is connected between the tungsten filament upper fixing chuck and the tungsten filament lower fixing chuck, a neodymium-iron-boron magnet is arrangedat the side of the tungsten filament, a wire is connected to the top of the tungsten filament, the other end of the wire is connected with a front amplifier and an information processor, the bottom ofthe tungsten filament is grounded through the sensitive diaphragm, and a cover is arranged on the top of the casing. Accordingly, the tungsten filament serves as a force sensing frequency conversionelement, and the sensor has the advantages of being high in tensile strength and free of creep deformation and slow sliding at room temperature so as to achieve the excellent characteristics of high resolution ratio and no zero drift.
Description
technical field [0001] The invention relates to the technical field of sensors, in particular to a vibrating wire sensor for weighing. Background technique [0002] Existing weighing sensors for measuring the weight of the vehicle mostly use impedance bridge type force measurement technology or other impedance type sensors, impedance bridge type force measurement technology. The balanced bridge pressure changes with the measured weight. The bridge pressure is amplified and transmitted to the displayed signal, which is the measured weight. The disadvantages are: the value of the impedance element will change due to the external temperature and humidity, and the amplitude of the bridge pressure will vary with the line along the route. Resistance and noise interference and distortion. [0003] Some companies use steel string sensors to measure force. This technology uses steel strings to measure the weight of the vehicle, and uses excitation coils to excite the steel strings t...
Claims
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IPC IPC(8): G01G19/02G01G3/08
CPCG01G3/08G01G19/02
Inventor 孙世阳孙厚钧高军
Owner BEIJING HUATEKELIN TECH
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