CN200959007Y

CN200959007Y - Water-content determiner

Info

Publication number: CN200959007Y
Application number: CN 200620108435
Authority: CN
Inventors: 罗成石
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-10-09
Filing date: 2006-10-09
Publication date: 2007-10-10
Anticipated expiration: 2016-10-09

Abstract

The utility model relates to an aquametry apparatus including a tunnel body. The top of the tunnel body is provided with a detection cylinder, a detection module is arranged in the cylinder, the utility model is characterized in that the detection module is composed of a moisture sampling and converting module and a temperature detection module, the moisture sampling and converting module and the temperature detection module connect a sampling signal output end with a singlechip processor which is arranged in the tunnel body, the singlechip processor is also connected with a display screen and a keyboard input unit, the display screen and the keyboard input unit are arranged on the outside surface of the tunnel body, the sensors of the moisture detection module and the temperature detection module are arranged in the detection cylinder. The utility model has the characteristics of a high reliability, a good accuracy and a convenient use.

Description

A kind of water tester

Technical field

The utility model relates to a kind of water tester, specifically is a kind of water tester of mainly levying grain.

Background technology

Along with science and technology development and growth in the living standard, people are more and more to the demand of materials such as grain, seed, medicine, chemical industry, food.Water content directly influences the safe storage and the trade deciding grade and level of these materials, and therefore the moisture content inspection in storage, the trade process is very important.For a long time, the water content of article generally relies on the hand rubbing mouth to sting judgement by rule of thumb, and error is very big, and is extremely unreliable, causes article such as a large amount of grains, seed, medicinal material mildew and rot rotten at storage and transportation, causes huge loss.Traditional water content detection adopts rapid weight loss method, and this method electricity that takes consuming time can only use in the laboratory, can not satisfy the needs of on-the-spot moisture content fast detecting, and damage sample.Electrical measuring method moisture content Fast Detection Technique development in recent years is very fast, but problems such as the ubiquity measuring error is big, be difficult to obtain the approval of relevant department, the method that detects moisture content at present mainly is the measuring method of resistance-type, and it is to utilize the grain electric conductivity character relevant with grain moisture content to measure the method for moisture indirectly; Common sonde configuration is sharp mouth type, is used for cereal moisture content and detects, and is simple in structure, low price; Also some instrument is as resistance access circuit grain, but need earlier grain to be ground, be pressed into the resistance of fixed size and shape again, this instrument has advantages such as speed is fast, simple in structure, easy to carry, but the shortcoming of resistance-type moisture teller is: easily temperature influence should, should not measure water and high-load water, this external cause electrode contact sample, contact condition also can influence precision.

In recent years, country is to carry out the unified purchase and sale of grain, carry out that grain purchases are unitized, standardization, rationalization, the production of many industries simultaneously, manage storage and the numerous and confused appealing of administrative authority and develop the quick aquametry apparatus that reliability height, accuracy are good, easy to use, be easy to carry about with one as early as possible.According to the existing problem of existing moisture teller, and present research data analysis, the exploitation of high-performance Moisture Meter mainly contains the development trend of following direction.Research active data integration technology realizes comprehensive moisture teller by a plurality of physical quantitys are detected.Be subjected to multiple factor affecting by water content detection, can determine that at present temperature, density and weight are that influence is tangible physical quantity, therefore these physical quantitys are gathered simultaneously, pass through great deal of experiment data, utilize the data fusion technology, find out a kind of moisture measurement relation curve that can close each reason, amount obtains moisture measurement result accurately eventually.

The utility model content

The purpose of this utility model is to provide a kind of water tester that adopts the measurement by capacitance method, the measurement by capacitance method is tested non electrical quantity to be changed be converted into electric quantity change, and electric weight analyzed and export, this method has the definition height, but non-cpntact measurement, and the advantage that can under mal-conditions such as high temperature, radiation and sharp pounding, work, and with the data that record be pre-stored in that a large amount of experimental datas compare affirmation in the micro computer, and drawing corresponding water content value, this product has reliability height, characteristics that accuracy is good, easy to use.

For realizing this purpose by the following technical solutions:

A kind of water tester comprises cylindrical shell, be provided with one on the top of cylindrical shell and measure tube, detection module and power module are provided with inner barrel, it is characterized in that: described detection module is made up of moisture content sampling and conversion module and temperature detecting module, moisture content sampling and conversion module and temperature detecting module link the signal output part of sampling with the processor of single chip computer that is arranged on inner barrel, processor of single chip computer also links with display screen and key-to-disk, described display screen and key-to-disk are arranged on the outside surface of cylindrical shell, and the inductor of described moisture content test module and temperature detecting module all is arranged on to be measured in the tube.

Described temperature detecting module is the temperature measuring circuit that 33202 amplifiers are formed.

Described moisture content sampling and conversion module are made of 555 oscillatory circuits.

When the utility model is measured a certain amount of sample put into and measure tube, capacitance type sensor can change into electric weight by relative dielectric constant, and survey electric capacity by 555 oscillatory circuits and change and to obtain needed measurement coefficient, and data transfer is carried out analyzing and processing to processor module; On the other hand temperature detecting module by its diode as temperature sensor, and become electric signal to send processor module to the temperature inversion, the data that processor module imports into according to moisture content test module and temperature detecting module, and will measure the data of gained and be pre-stored in advance that experimental data compares in the processor by the program of processor, after comparing and analyzing, processor shows by display module the result that contrast obtains in display screen; The present relatively measuring method of whole measuring process of the present utility model seems very convenient, adopts capacitive test method resolution higher simultaneously, and the reliability and the accuracy of measurement result are higher.

Description of drawings

Fig. 1, surface structure synoptic diagram of the present utility model;

The inner structure synoptic diagram of Fig. 2, the utility model cylindrical shell;

Fig. 3, the utility model draw bail synoptic diagram;

The circuit diagram of Fig. 4, the utility model temperature detecting module;

Fig. 5, the sampling of the utility model moisture content and conversion module circuit diagram.

Embodiment

As Figure 1-3, a kind of water tester comprises cylindrical shell 1, is provided with one on the top of cylindrical shell and measures tube 11, and detection module and power module are provided with inner barrel, and power module provides the voltage of operate as normal for each parts and each module; Detection module is by moisture content sampling and conversion module and temperature detecting module, moisture content sampling and conversion module and temperature detecting module are given the processor of single chip computer that inner barrel is set with the signal conveys of sampling, described processor of single chip computer is the MSP430 processor of single chip computer, it carries the AD module, and gather outside data by it and analyze and calculate, then export to corresponding module and control and do corresponding processing, processor of single chip computer also links with display screen and key-to-disk, also be provided with the serial input interface on the MSP430 processor of single chip computer, it mainly is writing and revising for the debugging of MSP430 processor of single chip computer and program.Described display screen 12 and key-to-disk 13 are arranged on the outside surface of cylindrical shell, and the inductor of described moisture content test module and temperature detecting module all is arranged on to be measured in the tube.

As Fig. 4 is described temperature detecting module, is the temperature measuring circuit that one 33202 double operational is formed, and it makes temperature sensor by diode, its sensitivity is about-and 2Mv/ ℃.Temperature measurement range is 0-50 ℃, requires output voltage 0-2V.The instrumentation amplifier that amplifier adopts double operational to form, operating voltage are+3V to adopt the MC33202 double operational can satisfy the needs of circuit.R1=R4=10K in the circuit, R2=R3=1K, R5 adopt the 5K potentiometer to adjust gain.Calculation of Gain is as follows: the sensitivity of establishing temperature sensor is-2MV/ ℃, and then 0-50 ℃ the time, the Vf of diode is changed to 100MV, and output voltage requires 2V, then Amplifier Gain AV=20; R5=2.22K.The available 5K potentiometer that gains is adjusted, and potentiometer is changed resistance after also can adjusting.

Be illustrated in figure 5 as described moisture content sampling and conversion module, it is made of 555 oscillatory circuits and capacitance type sensor.We change by 555 oscillatory circuits and survey electric capacity can obtain needed measurement coefficient, and gives processor module by the numeration chip.

Principle of work of the present utility model is according to temperature, these physical quantitys of density and weight, these physical quantitys are gathered simultaneously, pass through great deal of experiment data, utilize the data fusion technology, find out a kind of moisture measurement relation curve that can close each amount, and these data are deposited in advance in the processor module of water tester, when testing moisture content, we put into the grain sample of constant weight and measure tube, the temperature sensor of measuring in the tube becomes electric weight with the temperature data of sample with the moisture content data conversion respectively with capacitive transducer, send processor module to, processor module compares according to input quantity and pre-deposit data, and corresponding moisture data are shown by display module.

The utility model adopts capacitive transducer to gather the water content data, and the non electrical quantity data conversion become electric quantity data and send processor module to, sing non-cpntact measurement heartily, and can under mal-conditions such as high temperature, radiation and sharp pounding, work because of its capacitive transducer has simple in structure, resolution; The utility model is pre-stored in the data of processor module for passing through great deal of experiment data in addition, utilize the data fusion technology, find out a kind of moisture measurement relation curve that can close each amount, therefore the result of this measurement meets reliability height, requirement that accuracy is good fully, and the utility model characteristics easy to use, that be easy to carry about with one are beneficial to and apply very much simultaneously.

Claims

1, a kind of water tester comprises cylindrical shell, be provided with one on the top of cylindrical shell and measure tube, detection module is provided with inner barrel, it is characterized in that: described detection module is made up of moisture content sampling and conversion module and temperature detecting module, moisture content sampling and conversion module and temperature detecting module link the signal output part of sampling with the processor of single chip computer that is arranged on inner barrel, processor of single chip computer also links with display screen and key-to-disk, described display screen and key-to-disk are arranged on the outside surface of cylindrical shell, and the inductor of described moisture content test module and temperature detecting module all is arranged on to be measured in the tube.

2, a kind of water tester as claimed in claim 1 is characterized in that: described temperature detecting module is the temperature measuring circuit that 33202 amplifiers are formed.

3, a kind of water tester as claimed in claim 1 is characterized in that: described moisture content sampling and conversion module are made of 555 oscillatory circuits and capacitance type sensor.

4, a kind of water tester as claimed in claim 1, it is characterized in that: described processor of single chip computer is the MSP430 processor of single chip computer, it carries that AD module and external temperature detect, moisture content sampling and conversion module and display screen and key-to-disk link, and also is provided with the serial input interface on the MSP430 processor of single chip computer.