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Intelligent liquid level sensor and measuring method thereof

A liquid level sensor and sensor technology, which is applied in the field of sensors, can solve the problems of not being able to automatically adapt to changes in ambient temperature, humidity, and medium composition, and achieve the effects of improving self-adaptive capabilities, simple methods, and reducing development costs

Inactive Publication Date: 2007-08-08
HOHAI UNIV CHANGZHOU
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Problems solved by technology

[0010] The invention provides an intelligent liquid level sensor. Its purpose is to overcome the deficiency that the existing liquid level sensor cannot automatically adapt to changes in ambient temperature, humidity, and medium composition, so as to meet the needs of various measurement environments.

Method used

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  • Intelligent liquid level sensor and measuring method thereof
  • Intelligent liquid level sensor and measuring method thereof
  • Intelligent liquid level sensor and measuring method thereof

Examples

Experimental program
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Embodiment 1

[0041] Example 1. Intelligent liquid level sensor

[0042] See Fig. 1, the intelligent liquid level sensor of this implementation example comprises the distance measuring sensor 4 that two ultrasonic transmitting sensors and one ultrasonic receiving sensor constitute; Microcontroller unit 1 and CAN bus communication unit 3 behind the signal unit.

[0043]See Fig. 5, the model of the microcontroller 1-1 labeled as U1 is PIC18F258 single-chip microcomputer, and this single-chip microcomputer is integrated with 32KB of Flash program memory, 1536B of SRAM and 256B of EEPROM, and has the incomparable advantages of many other single-chip microcomputers: First of all, it adopts the Harvard dual-bus structure, and the data and instruction transmission buses are completely separated, so that the program and data can be accessed at the same time, which improves the data throughput. Secondly, it adopts a two-stage pipeline structure, which can fetch the next instruction while executing ...

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Abstract

The invention relates to a liquid level signal parameter measuring intelligent sensor and method, which comprises the sensor and the sensor control unit. Its features are: the pulse signal issued by the microcontroller passes through the differential electronic circuit and changes into a standard pulse signal, and then through a driving circuit to form the pulse signal, and then the signal drives two ultrasonic transmitting sensors; the loop wave signal of the said ultrasonic receiving sensor passes through the amplification circuit unit, and then through the comparison circuit unit to form a pulse signal to trigger mono-stable trigger circuit unit, and finally, the loop wave signal enters the microcontroller to analysis and process. The invention uses the ultrasonic measuring technique to spot and continuous measure the liquid level, and do not need special protection, to overcome existing liquid level sensor's inadequate that can not automatically adapt to the changes of environmental temperature, humidity, and media content, and its installation and maintenance are more convenient, structure and method relatively simple, low prices to meet the various needs of the measurement environment.

Description

technical field [0001] The invention relates to a sensor, in particular to an intelligent sensor for measuring liquid level signal parameters and a measuring method thereof. Background technique [0002] Liquid level measurement has a wide range of applications in water conservancy departments, meteorological departments, and chemical industries. Among them, ultrasonic measurement is an important method. Ultrasonic liquid level measurement has many advantages: it can not only measure liquid level at fixed point and continuously, but compared with other position measuring technologies, it does not require special protection, it is more convenient to install and maintain, and its structure and method are relatively simple and the price is low. [0003] In ultrasonic liquid level measurement technology, the most widely used is the ultrasonic pulse echo method. When sound waves propagate from one medium to another, the direction of propagation changes at the interface between ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01F23/296G01S15/08G08C17/02G08C19/00
Inventor 郭建甲范新南
Owner HOHAI UNIV CHANGZHOU
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