Quantitative weighing system based on buoyant force weighing sensing principle

A technology of load sensing and load cell, applied in the direction of weighing, weighing equipment using fluid balance, counterweight scales, etc., can solve problems such as drift, lag zero point, creep, etc., and achieve high weighing accuracy , strong reliability, strong anti-interference ability

CN101464181AInactive Publication Date: 2009-06-24孔令宇
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2009-06-24
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention belongs to the field of detection and automatic control. A quantifying-weighing system based on the buoyancy weighing sensing principle comprises a leverage mechanism, a shedding mechanism, a buoyancy sensor and a CPLD control system. According to the liquid buoyancy principle, the buoyancy weighing sensor converts the measured gravity value in the form of linear relation into displacement value which clearly refers to the displacement, and outputs the displacement value in the form of electrical signal. The buoyancy weighing sensor is free of technical defects such as creep deformation, zero point, sensitivity drift and the like. The CPLD control system consists of an R / V change and voltage amplification module, an A / D conversion module, a CPLD data processing module, a display module, a relay part and a motor as well as an electromagnetic vibrating machine control system; and the fundamental controlling principle thereof is that the control system converts a complex digital control logical system into the SOC (design system on chip design) by employing the VHDL language and adopting the top down design method. The invention achieves the effects of reducing the size of the system, enhancing the reliability of the system, shortening the development period, reducing the development cost, and greatly improving the accuracy of the dynamic weighing.
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Description

technical field

[0001] The invention belongs to the technical field of weighing measurement and automatic measurement and control systems, in particular to a quantitative weighing system based on the principle of buoyancy weighing sensing. Background technique

[0002] Weighing measurement is a technology that is closely related to human life and production activities. At present, the commonly used weighing technology is the principle of leverage, Hooke's law and strain sensor.

[0003] In industrial production automation, the measurement of the total weight of materials during the transmission process, the real-time measurement of the weighing value per unit time control of online raw materials, the quantitative weighing of online raw materials and the quantitative packaging of products are all efficient production and quality control. , key technologies to reduce costs and ensure consumer benefits.

[0004] At present, the quantitative weighing technology of materials in ...

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Embodiment Construction

[0039] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0040] figure 1 middle:

[0041] The structure of the feeding barrel 1 can be an empty barrel for materials with good fluidity, and a motorized screw blade mechanism should be set in the barrel for materials with poor fluidity to facilitate feeding. The adjustable door 2 is used to adjust the size of the discharge flow. The optimal solution for feeder 3 is to use an electric vibration feeder. The electromagnet 5 used to open the discharge valve 7 is fixed on the weighing cylinder 4, and the movable iron core of the electromagnet 5 is connected with the discharge valve 7 through the lever system 6 of the discharge valve. The position of the buoyancy load cell 9 is fixed, and its axis is vertical and parallel to the axis of the weighing cylinder, and its parallel distance is a set value; the dowel bar 10 is fixed on the weighing cylinder 4, and its axi...