CN2556641Y

CN2556641Y - Water content detector for grain and cotton

Info

Publication number: CN2556641Y
Application number: CN 02268399
Authority: CN
Inventors: 郭荣光; 陈庆明
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-07-20
Filing date: 2002-07-20
Publication date: 2003-06-18
Anticipated expiration: 2012-07-20

Abstract

The utility model relates to an aquiferous grain and cotton measuring apparatus and belongs to the electrics technology field. The utility model is characterized that the design of the measuring apparatus is a mini integrated structure, which comprises probes 1, an apparatus body 2 and a handle 3, wherein, all electric circuits are positioned in the apparatus body 2, the two probes are injection molded with the apparatus body into an integral structure. The measuring apparatus is characterized by small volume, light weight, with integration of parole, impulse audible alarm and liquid crystal digital display. The utility model can be widely applied to water content percentage measurement of a plurality of substances such as grains, cottons, hemps, woods, crop straws, vegetable seeds, construction materials, fertilizers, etc.

Description

The moisture measuring instrument of grain and cotton

The utility model belongs to the electroporation field.Definite a kind of electronic device of measuring the grain and cotton water cut of saying so.

The prior art close with the utility model mainly contains three kinds.First kind has pressing tongs formula sensor, analog operational circuit, and A/D converter and liquid crystal digital show.Second kind has probe sensor, and DC/DC high-pressure generating circuit and pointer gauge show.The third has probe sensor, voltage comparator, LED light and language alarm circuit.Their common drawback one is that power consumption is big, volume greatly, therefore, sensor separates with the instrument body that electronic circuit, display and battery are installed, and is connected by signal wire between two parts.The 2nd, because the principle restriction, error is bigger, and the 3rd, preceding two kinds all do not have overload alarm, can not satisfy grain and cotton and purchase on-the-spot actual needs.The 4th, function singleness only possesses numeral and shows or a kind of function of language alarm.

The purpose of this utility model is to overcome the shortcoming of above-mentioned three kinds of grain and cotton water cut electronic gauges.A kind of small-sized integrated structure is provided, can sets limit value easily, numeral shows, and sends the moisture surveying instrument of grain and cotton of measured value language reading sound and language and pulse alarm sound.

The technical solution of the utility model is to realize like this, the grain and cotton measuring instrument is designed to small-sized integrated structure, comprise steel probe 1, instrument body 2, handle 3, be provided with whole electronic circuits in this measuring instrument instrument body 2, comprise input impedance change-over circuit 4, Working state checking circuit 5, A/D change-over circuit 6, push-button array 7, temperature sensing circuit 8, stabilized voltage supply 9, microprocessor 10, battery 11, battery undervoltage detection circuit 12, LCD 13, with sound out-put circuit 14, probe 1 connects input impedance change-over circuit 4 and Working state checking circuit 5, the output of input impedance change-over circuit 4 is connected with A/D change-over circuit 6, Working state checking circuit 5, A/D change-over circuit 6, push-button array 7, the output of temperature sensing circuit 8 all is connected with microprocessor 10, battery 11 is connected through all parts of stabilized voltage supply 9 and other, battery 11 is connected with battery undervoltage detection circuit 12, the latter's output is connected with microprocessor 10, the output of microprocessor 10 respectively with LCD 13, sound out-put circuit 14 connects.

Two probes in the technical solutions of the utility model are 1 isometric, isometrical, the outer end is taper, be arranged in parallel and are injected into one-piece construction with instrument body 2.

Two probes all insert in the grain and cotton during work, electric signal through input impedance change-over circuit 4 with after connect A/D converter 6 impedance matchings, send microprocessor 10 to carry out calculation process then, input signal send Working state checking circuit 5 to send microprocessor 10 then simultaneously, stabilized voltage supply 9 with No. 5 dry cells of 4 joints provide by completely measuring the voltage all-the-time stable that reduces gradually during being about to use up on the fixed value that is fit to the circuit operate as normal, offer each several part, battery under-voltage testing circuit 12, a cell voltage and a setting are compared, the result send microprocessor 10, push-button array 7 is with the order of operator's input, parameter is sent microprocessor 10, the signal of sending here according to Working state checking circuit 5 and battery under-voltage testing circuit 12 at first, the decision automatic switching.Behind Auto Power On, it carries out calculation process to the signal of A/D converter 6 and temperature sensing circuit 8 again, produce the accurate water percentage of tested grain and cotton, liquor charging crystal display 13 shows and compares with the warning limit value of push-button array 7 inputs, if transfinite, then will start sound out-put circuit 14 and send alarm sound.This measuring instrument chimes of doom has two kinds of language and pulsetones, also can import the warning limit value at any time and simultaneously by liquid crystal display displays.Through debugging, this measuring instrument also can be used for fiber crops, the moisture measurement of multiple materials such as crop straw, vegetable seed, building materials, chemical fertilizer.

Accompanying drawing is embodiment of the present utility model:

Accompanying drawing 1 is a structural representation of the present utility model.

Accompanying drawing 2 is a circuit block diagram of the present utility model.

Accompanying drawing 3 is the utility model host circuit schematic diagram.

As shown in Figure 1, 2, 3,1 is that steel probe, 2 is that instrument body, 3 is that handle, 4 is that input impedance change-over circuit, 5 is Working state checking circuit, 6 is the A/D change-over circuit, 7 is that push-button array, 8 is that temperature sensing circuit, 9 is that stabilized voltage supply, 10 is that microprocessor, 11 is that battery, 12 is that battery undervoltage detection circuit, 13 is a LCD, and 14 is sound out-put circuit.Instrument body 2, handle 3 adopts mold injection moldings, and two steel probes are 1 isometrical, isometric, the outer end is a cone angle, be arranged in parallel and is injected into one securely with the instrument body.Input impedance change-over circuit 4, Working state checking circuit 5, A/D change-over circuit 6 are by c ₁, R ₁, R ₂, A ₁Form.Microprocessor 10 is by N ₂, C ₄-C ₈, CR ₁Form.Battery under-voltage testing circuit 12 is by R ₅, R ₆, N ₁: A, N ₁: B forms, and sound out-put circuit 14 is by R ₉-R ₁₁, N ₃, T ₁, SP ₁Form.N wherein ₃Be speech synthesis ic, the inside imprinting overload alarm language recorded specially of the utility model, survey measurements language, battery under-voltage signal language mention the pulsetone alarm sound of custom of user.L ₁Be LCD 13.C ₂, A ₂Form stabilized voltage supply 9, wherein A ₂Be low-power consumption low pressure difference linear voltage regulator integrated circuit, only 7 microamperes of its quiescent currents, output voltage provide each circuit ingredient working power.B ₁Be that No. 5 dry cells of 4 joints are formed battery 11.Temperature sensing circuit is by R7, C ₃Form R ₇Be thermistor, its resistance and temperature negative correlation of living in are installed in it above probe 1, and when inserting it in the grain, but perception grain actual temperature is used for grain moisture content and compensates.Push-button array 7 is by S ₁-S ₃Form, be respectively " kind options button ", " limit value key " reaches " sound options button ".

Claims

1, the moisture measuring instrument of a kind of grain and cotton.Comprise steel probe 1, instrument body 2, handle 3, be provided with whole electronic circuits in this measuring instrument instrument body 2, comprise input impedance change-over circuit 4, Working state checking circuit 5, A/D change-over circuit 6, push-button array 7, temperature sensing circuit 8, stabilized voltage supply 9, microprocessor 10, battery 11, battery undervoltage detection circuit 12, LCD 13, with sound out-put circuit 14, probe 1 connects input impedance change-over circuit 4 and Working state checking circuit 5, the output of input impedance change-over circuit 4 is connected with A/D change-over circuit 6, Working state checking circuit 5, A/D change-over circuit 6, push-button array 7, the output of temperature sensing circuit 8 all is connected with microprocessor 10, battery 11 is connected through all parts of stabilized voltage supply 9 and other, battery 11 is connected with battery undervoltage detection circuit 12, the latter's output is connected with microprocessor 10, the output of microprocessor 10 respectively with LCD 13, sound out-put circuit 14 connects.

2, according to the moisture measuring instrument of the described grain and cotton of claim 1, it is characterized in that two probes are isometric, isometrical, the outer end is a cone-shaped body, be arranged in parallel and is injected into one-piece construction with instrument body 2.