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Multi-pulley type liquid level sensor device

A technology of a liquid level sensor and sensor device, which is applied in the direction of a buoy liquid level indicator, etc., can solve the problems of adjusting the liquid level measurement accuracy, the optical encoder becomes dirty, and the visual inspection cannot be performed, and achieves a reduction in volume and a small power supply requirement. , the effect of improving performance

Inactive Publication Date: 2013-12-04
MULTIDIMENSION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Prior art level sensing systems have some drawbacks in that they provide an electronic output signal but cannot be visually detected
These encoders are optical based and these optical encoders are prone to failure due to dirt
Currently, there is no clear way to adjust the device for widespread use in measuring levels at various depths in wells, nor is there a way to adjust the accuracy of level measurements

Method used

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  • Multi-pulley type liquid level sensor device
  • Multi-pulley type liquid level sensor device
  • Multi-pulley type liquid level sensor device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0069] Example 1: Encoder has 5 wheels with 5 sensors each, pulleys on top, sealed electrical feed through to external electronic communication unit in sealed housing, and legal codes on bottom pulleys.

[0070] The first example of this application is Figure 5 , 6 , 7 shown. Figure 5 A cross-sectional view of the front view. Coupling 30 provides a mechanical connection between pulley shaft 18 and encoder shaft 106 . The bracket 21 supports the weight of the pulley shaft 18 and the encoder rotating rod 106 as well as the additional force, and the bracket 21 is installed on the top of the housing bottom plate 22 . Five groups of runner PCB112 are installed on the system PCB31, and the runner PCB112 provides electrical connection between the sensor 116 and the system PCB31, and they can also provide some mechanical support for other parts of the encoder device, such as the permanent magnet 114.

[0071] The housing bottom plate 22 serves as the mechanical basis for the ent...

Embodiment 2

[0077] Embodiment 2: It is the same as Embodiment 1 except that a protective tube is added.

[0078] Although in Figure 5 , Image 6 with Figure 7 Not shown in , but a structure can be added near the tethering device below the container wall 25, e.g. figure 1 Protective tube 27 shown in . The purpose of adding this structure is to keep the float and other device components in place in the well or container while keeping them clear of any disruptive moving objects.

Embodiment 3

[0079] Embodiment 3: Except that the sealed housing has a transparent cover, the numbers on the running wheel can be read intuitively through this transparent cover, other is the same as Embodiment 1.

[0080] The housing top cover 23 can be made of a transparent material such as plastic so that the values ​​on the encoder wheels 101-105 can be read visually without removing the top cover. In addition, if the housing top cover 23 is opaque, a small transparent window can also be provided on it.

[0081]

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PUM

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Abstract

The invention discloses a multi-pulley type liquid level sensor device used for measuring the liquid level in a well or in a container. The sensor device comprises a mechanical floater, wherein the mechanical floater is tied on a tying rope and can slide up and down; the tying rope is installed on one or more pulleys; with the up-and-down slide of the floater, the pulleys rotate forwards and backwards; one pulley is mechanically coupled with a digital type absolute magnetic rotary encoder device; the encoder device is used for monitoring the total rotation angle of the pulley in real time; the height of the liquid level is calculated via a mode that the total rotation angle of the pulley is converted to a distance of the pulley away from the bottom by using an algorithm; a multi-wheel encoder reads in two forms, i.e. an electric signal form and an optical signal form; the electric signal output of the encoder perhaps can be used as the input of an industrial control system or can be transmitted to remote control or internet through a data channel; the precise measurement of the liquid level depends on the quantity of rotating wheels of the encoder; the total quantity of rotation of the pulley consistent with all-around measurement of the liquid level can be adjusted through mechanical gears or belts.

Description

technical field [0001] The invention relates to a sensor device capable of measuring the liquid level in a container or a well, in particular to a liquid level sensor which uses a combination of a pulley, a tether, an absolute magnetic rotary encoder and the like to measure the liquid level. Background technique [0002] In the technical field of liquid level sensors, we list here two patent documents describing the prior art related to this application. The first is US Patent US2012 / 006060601 "Tethered Float Level Sensor", which describes a pulley-float device in which a float floats on the surface of the liquid and a rotating transducer is used to register the output, And provides a way to transmit data to a remote location. [0003] A second prior art document on liquid level sensors is Blackburn's US Patent 5410913 "Remote Indicating Liquid Level Sensor", which shows a set of magnetic sensors for detecting the movement of a magnet at the top of a rotating rod. A key in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01F23/40
CPCG01F23/40G01F23/46
Inventor 詹姆斯·G·迪克马克·C·仝大
Owner MULTIDIMENSION TECH CO LTD
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