CN201497593U - Test box humiture measuring instrument - Google Patents

Test box humiture measuring instrument Download PDF

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Publication number
CN201497593U
CN201497593U CN2009200272388U CN200920027238U CN201497593U CN 201497593 U CN201497593 U CN 201497593U CN 2009200272388 U CN2009200272388 U CN 2009200272388U CN 200920027238 U CN200920027238 U CN 200920027238U CN 201497593 U CN201497593 U CN 201497593U
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CN
China
Prior art keywords
humidity
temperature
circuit
sensor
instrument
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN2009200272388U
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Chinese (zh)
Inventor
崔剑
张学范
张蕾
辛宗伟
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No 53 Institute of China North Industries Group Corp
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No 53 Institute of China North Industries Group Corp
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Priority to CN2009200272388U priority Critical patent/CN201497593U/en
Application granted granted Critical
Publication of CN201497593U publication Critical patent/CN201497593U/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

A test box humiture measuring instrument adopts a temperature measurement system made up of a platinum resistance temperature sensor, a multi-channel selection circuit, a constant-current source circuit, a signal amplification circuit and a high-precision A/D converting circuit, wherein the humidity sensor is adopted as a humidity measuring system and controlled by a single chip microcomputer, a channel to be tested can be selected through the multi-channel selection circuit, data can be stored and displayed through digital filter processing of the single chip microcomputer, and the humiture sensor can be provided with electric heating plugs. The utility model can be used for verification and calibration of environment experimental installation such as various test boxes, baking boxes, biochemical incubators and the like. The test box humiture measuring instrument is simple in structure and convenient to operate, the designability of the measuring accuracy and the applicable humiture range are strong, and the utility model has the function in detecting the stability, and the fluctuation and the uniformity of the humiture automatically and remarkably improves the work efficiency. The test box humiture measuring instrument provided by the utility model has small volume and light weight, serves dual purposes of desk top and portability, external power is not required by battery power supply, the power consumption is low, and the measuring instrument is portable and particularly suitable for on-site verification.

Description

A kind of chamber temperature and humidity measurement instrument
One, technical field
The utility model belongs to the metrological testing technology field, relates to the humiture metrological testing technology.
Two, background technology
Environmental experiment equipment such as all kinds of chambers, baking oven, biochemical incubator are experimental facilitiess commonly used in the industrial and agricultural production test, and it provides needed humiture environment for the pilot production activity.
Technical indicators such as the degree of stability of temperature or humidity, fluctuation degree, uniformity coefficient effectively play an important role to pilot production in its casing, and these technical indicators must periodic verification and calibration, with definite its within normal range of operation.
ZL 200420071754.8 disclosed a kind of temperature and humidity inspection measuring instruments, comprise channel selection circuit, constant-current source circuit, signal amplification circuit, A/D change-over circuit and usb bus interface module, a plurality of measured elements, wherein each constitutes the loop through channel selection circuit and constant-current source circuit, wherein the voltage at each measured element two ends is input to the signal amplification circuit amplification through channel selection circuit, convert digital signal to through the A/D change-over circuit again, be input to the data input pin of usb bus interface module, this interface module output gating road control signal is to channel selection circuit, and the USB interface of this interface module connects external USB interface of computer.
ZL 200710135264.8 discloses a kind of humiture measurement mechanism, includes temperature and humidity measurement part, data acquisition and processing (DAP) part, humiture display part.Use intelligence sensor to finish, realized the digital output of Temperature Humidity Sensor, owing to do not need to carry out humidity demarcating, so be very easy to the test of humiture.Data are present in the middle of its chip, and chip can be realized the A/D conversion, available assembly language programming and computing, and response speed is fast, and the measuring accuracy height is applicable to high temperature low humidity measurement environment.
ZL 94245915.6 discloses the automatic display controller of a kind of multichannel humiture, is to be made of touring detection display unit and automatic control unit, it is characterized in that: the touring display unit that detects comprises touring testing circuit and warm, Humidity Detection display circuit.Automatic control unit comprises start successively, shutdown circuit and temperature, humidity upper and lower limit automatic control circuit; The wherein touring output that detects display unit connects the input end of automatic control unit.Be used for the many air-conditionings in warehouse, dehumidifier or many warehouses centralized detecting and the humiture of controlling air-conditioning equipment show and the detection controller of start successively automatically in turn.
ZL 89205757.2 discloses a kind of accurate temperature and humidity inspection instrument, mainly by ventilated type Temperature Humidity Sensor, interface circuit, minimum microsystem, mini-printer formed, its ventilated type Temperature Humidity Sensor is dried with P N knot, wet bulb sensor is suspended in the special ventilation unit.Again with supporting high precision, multi-functional, the novel temperature and humidity inspection instrument that can telemeasurement formed of main frame and software thereof, printer.
ZL 00206385.9 discloses a kind of temperature and humidity measurement and display device that is used for the tobacco first baking process, it is characterized in that, lower end at junction box can divide into a plurality of sensor devices of installation by signal wire, each sensor device all comprises fixed support and is connected support, the two right-angled intersection links together, be separately installed with temperature sensor and humidity sensor at the two ends that connect support, wherein, the lower end of humidity sensor connects a sleeve pipe and can be positioned over respectively in water tank or the collection tube.
ZL 200410028165.6 discloses a kind of temperature and humidity inspection measuring instrument, comprise channel selection circuit, constant-current source circuit, signal amplification circuit, A/D change-over circuit and usb bus interface module, a plurality of measured elements, wherein each constitutes the loop through channel selection circuit and constant-current source circuit, wherein the voltage at each measured element two ends is input to the signal amplification circuit amplification through channel selection circuit, convert digital signal to through the A/D change-over circuit again, be input to the data input pin of usb bus interface module, this interface module output gating road control signal is to channel selection circuit, and the USB interface of usb bus interface module connects external USB interface of computer.The present invention directly is connected with external computing machine and controls, by the direct storing measurement data of external computing machine, carry out measurement data analysis, data management etc., the present invention also provides the platinum resistance thermometer sensor, error correcting method, use cheap sensor to reach, still can guarantee higher temperature and humidity measurement precision.
The temperature and humidity measurement instrument that above-mentioned document is introduced has different functions, characteristics and the scope of application, does not all have data processing functions such as humiture degree of stability, fluctuation degree, uniformity coefficient.The humiture test box measuring instrument that has the assay calibration function does not simultaneously appear in the newspapers.
Three, summary of the invention
The purpose of this utility model is to provide a kind of chamber temperature and humidity measurement instrument with humiture degree of stability, fluctuation degree, uniformity coefficient automatic Verification function, to improve environmental experiment equipment assay calibration efficient such as all kinds of chambers, baking oven, biochemical incubator.
The purpose of this utility model is to realize like this, adopt platinum resistance temperature sensor, hyperchannel to select circuit, constant-current source circuit, signal amplification circuit, high-precision A/D change-over circuit to form temperature measurement system, adopt the integrated humidity sensor as humidity measurement system, by Single-chip Controlling, select circuit to select tested path by hyperchannel, storage and video data after the single-chip microcomputer digital filtering is handled.
The chamber temperature and humidity measurement instrument that the utility model relates to, the m that comprise machine box 1, on the machine box, is provided with temperature sensor socket 2, a n humidity sensor socket 3, display screen 4, function selecting button 5 and shift knob 6, m temperature sensor 7, a n humidity sensor 8 (contour structures as shown in Figure 1, hardware block diagram as shown in Figure 2).Hardware system and power supply are set in the machine box; Hardware system is made up of monolithic processor controlled temperature collection circuit, humidity Acquisition Circuit, data processing and display circuit; Temperature collection circuit selects circuit, constant-current source circuit, signal amplification circuit, A/D change-over circuit to form by the accurate platinum resistance temperature sensor 7 of m four-wire system, hyperchannel, under Single-chip Controlling by temperature sensor collection and process temperature information; The humidity Acquisition Circuit selects circuit to form by n integrated humidity sensor 8, hyperchannel, under Single-chip Controlling by humidity sensor collection and processing humidity information; Preset the control of humiture channel selecting, sampling and data handling system in the single-chip microcomputer, show and the storage data.
The chamber temperature and humidity measurement instrument that the utility model relates to, the quantity m of described temperature sensor socket is 1~15.
The chamber temperature and humidity measurement instrument that the utility model relates to, the quantity n of described humidity sensor socket is 1~10.
The chamber temperature and humidity measurement instrument that the utility model relates to, the quantity m of described temperature sensor socket is 1 o'clock, temperature sensor directly links to each other with signal amplification circuit.
The chamber temperature and humidity measurement instrument that the utility model relates to, the quantity n of described humidity sensor socket is 1 o'clock, the integrated humidity sensor directly links to each other with single-chip microcomputer.
The chamber temperature and humidity measurement instrument that the utility model relates to, described temperature sensor socket are four-core aviation socket.
The chamber temperature and humidity measurement instrument that the utility model relates to, described humidity sensor socket are four-core aviation socket.
The chamber temperature and humidity measurement instrument that the utility model relates to, the machine box back side also has support 9.
The chamber temperature and humidity measurement instrument that the utility model relates to is simple in structure, easy to operate, measuring accuracy and suitable temperature humidity range designability are strong, have humiture degree of stability, fluctuation degree, uniformity coefficient automatic Verification function, can show, handle and store data automatically, can effectively shorten the calibration operation time one time, significantly improve work efficiency.Temperature Humidity Sensor all can charged hot plug.
The chamber temperature and humidity measurement instrument volume that the utility model relates to is little, in light weight, desk-top portable dual-purpose, and the powered battery dispense with outer connecting power, low in energy consumption, be easy to carry, be specially adapted to on-site proving.
Four, description of drawings
Accompanying drawing 1 chamber temperature and humidity measurement instrument shape assumption diagram
Accompanying drawing 2 chamber temperature and humidity measurement instrument hardware catenation principle block diagrams
The chamber temperature and humidity measurement instrument structural representation of 3 one kind of five tunnel temperature of accompanying drawing, No. two humidity sensors
The chamber temperature and humidity measurement instrument software workflow figure of 4 one kind of five tunnel temperature of accompanying drawing, No. two humidity sensors
1---the machine box, 2---the temperature sensor socket, 3---the humidity sensor socket, 4---display screen, 5---the function selecting button, 6---shift knob, 7 temperature sensors, 8---humidity sensor, 9---support
Five, specific embodiments
Below in conjunction with accompanying drawing the chamber temperature and humidity measurement instrument that the utility model relates to is described in further detail, but not as the restriction that the utility model is related to technical scheme.
Embodiment one
The chamber temperature and humidity measurement instrument of a kind of five tunnel temperature, No. two humidity sensors, structural representation as shown in Figure 3, the measuring instrument software workflow is as shown in Figure 4.
Machine box 1 is 236 * 130 * 43mm, the plastic casing of wall thickness 2mm, function selecting button 5, shift knob 6 are respectively membrane buttons, employing presses mode and works, and is connected with the equipment circuit mainboard by flexible PCB, and display screen 4 is the OCMJ4X8 Liquid Crystal Module, be fixed on the machine box 1 panel display window, be connected with the equipment circuit mainboard by flat cable, Temperature Humidity Sensor socket 2,3 is DF20B-4 type four-core aviation socket, and machine box 1 back side also has support 9.
Temperature collection circuit is made up of the PT100 platinum resistance temperature sensor and the CD4066 circuit chip of REF200 constant current source, the amplification of AD7705 signal and high-precision A/D conversion chip, five assembly cover.Temperature sensor links to each other with the I/O pin of the CD4066 chip of selecting as the temperature hyperchannel respectively by the four-core aviation plug, REF200 constant current source output terminal is connected to CD4066 and goes up corresponding current excitation I/O pin, the signal measurement pin of CD4066 is connected to the AD7705 signal input part, amplify and high-precision A/D conversion, P0.0 by the AT89C55WD single-chip microcomputer, P0.1, P0.2, P0.3, the P0.4 mouth is connected respectively to CD4066 control pin, the channel selecting of control 1~5 passage PT100 platinum resistance temperature sensor, AD7705 output signal pin is connected to the P1.0 of main control singlechip AT89C55WD, P1.1, P1.2, the P1.3 mouth is handled the back storage by the single-chip microcomputer digital filtering.
The output signal of humidity sensor SHT75 is the digital signal with the single-chip microcomputer compatibility, its pin links to each other by the I/O pin of four-core aviation plug with the CD4066 chip of selecting as the humidity hyperchannel, and the signal measurement pin of CD4066 directly is connected with single-chip microcomputer P2.0, P2.1 mouth.
Show and adopt the OCMJ4X8 Liquid Crystal Module, work in serial mode, be connected with single-chip microcomputer by P1.4, P1.5, P1.6 mouth, keyboard uses free-standing keyboard, by P2.2, P2.3, P2.4, four function keys of P2.5 mouth control, constitutes the complete circuit system.The entire circuit system layout also is fixed in the machine box 1.
The chamber temperature and humidity measurement instrument that present embodiment provides, temperature measurement range-50 ℃~200 ℃, measuring error is not more than 0.05 ℃, and at moisture measurement scope 10%RH~90%RH, measuring error is not more than 2%RH.
After the start, instrument carries out system initialization under Single-chip Controlling, show information such as manufacturer's instrument model and numbering, respectively the temperature sensor 71,72,73,74,75 and humidity sensor 81,82 gatings that have connected are measured, automatically roll screen shows humiture, if socket does not connect sensor, show not connect "---" sign.Select by keyboard, can enter different calibrating modes, carry out the calibrating of projects such as chamber humiture deviation, uniformity coefficient and fluctuation degree automatically.

Claims (8)

1. chamber temperature and humidity measurement instrument, it is characterized in that: comprise machine box (1), m the temperature sensor socket (2) that on the machine box, is provided with, a n humidity sensor socket (3), display screen (4), function selecting button (5) and shift knob (6), m temperature sensor (7), a n humidity sensor (8); Hardware system and power supply are set in the machine box; Hardware system is made up of monolithic processor controlled temperature collection circuit, humidity Acquisition Circuit, data processing and display circuit; Temperature collection circuit selects circuit, constant-current source circuit, signal amplification circuit, A/D change-over circuit to form by the accurate platinum resistance temperature sensor (7) of m four-wire system, hyperchannel, under Single-chip Controlling by temperature sensor collection and process temperature information; The humidity Acquisition Circuit selects circuit to form by n integrated humidity sensor (8), hyperchannel, under Single-chip Controlling by humidity sensor collection and processing humidity information; Preset the control of humiture channel selecting, sampling and data handling system in the single-chip microcomputer, show and the storage data.
2. the described chamber temperature and humidity measurement of claim 1 instrument, it is characterized in that: the quantity m of described temperature sensor socket is 1~15.
3. the described chamber temperature and humidity measurement of claim 1 instrument, it is characterized in that: the quantity n of described humidity sensor socket is 1~10.
4. the described chamber temperature and humidity measurement of claim 1 instrument, it is characterized in that: the quantity m of described temperature sensor socket is 1 o'clock, and temperature sensor directly links to each other with signal amplification circuit.
5. the described chamber temperature and humidity measurement of claim 1 instrument, it is characterized in that: the quantity n of described humidity sensor socket is 1 o'clock, and the integrated humidity sensor directly links to each other with single-chip microcomputer.
6. the described chamber temperature and humidity measurement of claim 1 instrument, it is characterized in that: described temperature sensor socket is a four-core aviation socket.
7. the described chamber temperature and humidity measurement of claim 1 instrument, it is characterized in that: described humidity sensor socket is a four-core aviation socket.
8. the described chamber temperature and humidity measurement of claim 1 instrument, it is characterized in that: the machine box back side also has support (9).
CN2009200272388U 2009-06-10 2009-06-10 Test box humiture measuring instrument Expired - Fee Related CN201497593U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
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Publications (1)

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Application Number Title Priority Date Filing Date
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103591976A (en) * 2013-11-25 2014-02-19 北京航天易联科技发展有限公司 Humidity sensor calibration box
CN104167197A (en) * 2013-11-28 2014-11-26 扬州市维扬区翔声民族乐器厂 Novel processing method for manual zither making
CN104185311A (en) * 2014-08-26 2014-12-03 无锡市华牧机械有限公司 Heating circuit provided with sampling circuit and used in biomass granulator
CN104393881A (en) * 2014-12-08 2015-03-04 成都中远信电子科技有限公司 Portable high-efficiency signal acqusition and processing board device

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103591976A (en) * 2013-11-25 2014-02-19 北京航天易联科技发展有限公司 Humidity sensor calibration box
CN103591976B (en) * 2013-11-25 2016-08-24 北京航天易联科技发展有限公司 Humidity sensor calibration box
CN104167197A (en) * 2013-11-28 2014-11-26 扬州市维扬区翔声民族乐器厂 Novel processing method for manual zither making
CN104185311A (en) * 2014-08-26 2014-12-03 无锡市华牧机械有限公司 Heating circuit provided with sampling circuit and used in biomass granulator
CN104185311B (en) * 2014-08-26 2016-06-08 无锡市华牧机械有限公司 For biomass granulation machine has the heater circuit of sample circuit
CN104393881A (en) * 2014-12-08 2015-03-04 成都中远信电子科技有限公司 Portable high-efficiency signal acqusition and processing board device

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GR01 Patent grant
C14 Grant of patent or utility model
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20100602

Termination date: 20140610

C17 Cessation of patent right