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Liquid level sensor and measuring method thereof

A technology of a liquid level sensor and a measuring method, which is applied to the buoy liquid level indicator and other directions, can solve the problems of complex manufacturing process, high cost, inability to detect, etc., and achieve the effects of small size, stable performance and low cost

Active Publication Date: 2014-01-15
上海雅燊电子技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But there are blind areas that cannot be detected, and the manufacturing process is complicated and the cost is high

Method used

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  • Liquid level sensor and measuring method thereof
  • Liquid level sensor and measuring method thereof
  • Liquid level sensor and measuring method thereof

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0035] see figure 1 with figure 2 , the liquid level sensor of this application includes:

[0036] - The housing 1, which encloses a closed cavity inside. The inside of the airtight cavity is further divided into a first cavity 11 and a second cavity 12 by a partition 10 . A photoelectric sensor 13 is fixed on the partition 10, and the photoelectric sensor 13 is composed of a light emitter and a light receiver.

[0037] - The controller 2 , such as a single chip microcomputer, PLC (programmable logic controller), etc., is located in the first cavity 11 . On the one hand, the controller 2 outputs pulses to the stepping motor 3 to control the output shaft 30 of the stepping motor 3 to generate angular displacement; Liquid level height.

[0038] ——The stepper motor 3 is located in the first cavity 11 . It has an output shaft 30 passing through the partition 10 . Every time an output pulse from the controller 2 is received, the output shaft 30 of the stepping motor 3 gener...

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Abstract

The invention discloses a liquid level sensor. The liquid level sensor comprises a shell, a controller, a stepping motor, a detection disk, a shaft bracket, a floater and a rotary disk. A photoelectric sensor is fixed inside the shell. The controller drives an output shaft of the stepping motor to generate angular displacement and calculates the liquid level. The stepping motor is provided with the output shaft. The detection disk rotates along with the output shaft of the motor. Blocking pieces and detection elements are fixed to the detection disk, wherein the detection elements are two Hall sensors of the same specification. A floater shaft is rotatably fixed to the shaft bracket, and a first gear is fixed to the floater shaft. The floater floats on the surface of measured liquid and is fixed to the floater shaft through a floater rod. The rotary disk and the output shaft of the motor are same in axial lead. A second gear meshed with the first gear is arranged on the rotary disk, and a phase magnet is fixed to the rotary disk. The invention further discloses a measuring method of the liquid level sensor. The liquid level sensor and the measuring method of the liquid level sensor have the advantages of being high in measuring accuracy, insensitive to the environment temperature change and the like.

Description

technical field [0001] This application relates to a liquid level sensor that can be used to measure the liquid level of various liquids. Background technique [0002] In the field of liquid level detection, there are many kinds of measurement methods. At present, more liquid level sensors are used, including variable resistance type, reed switch type, magnetostrictive type and so on. [0003] The variable resistance liquid level sensor is to place a float in the liquid so that it always floats on the liquid surface, and the float is also connected to the sliding end of the sliding rheostat. The float rises or falls with the liquid level, and the sliding end of the sliding rheostat connected with the float also moves accordingly, so that the liquid level can be known by detecting the resistance value of the sliding rheostat. [0004] The variable resistance liquid level sensor has the following disadvantages: [0005] First, there is a possibility that the sliding rheosta...

Claims

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Application Information

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IPC IPC(8): G01F23/38
Inventor 张维国
Owner 上海雅燊电子技术有限公司
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