CN201780680U - Humiture data acquisition instrument - Google Patents
Humiture data acquisition instrument Download PDFInfo
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- CN201780680U CN201780680U CN2010205308196U CN201020530819U CN201780680U CN 201780680 U CN201780680 U CN 201780680U CN 2010205308196 U CN2010205308196 U CN 2010205308196U CN 201020530819 U CN201020530819 U CN 201020530819U CN 201780680 U CN201780680 U CN 201780680U
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Abstract
A humiture data acquisition instrument comprises a main frame and a sensing head module. The sensing head module comprises a sensing head interface plug, a cable and a probe; a temperature measuring resistor, a humidity sensitive capacitor, a double time base integrated circuit and a peripheral circuit are arranged in the probe; a signal processing module, a data acquisition module, a humiture signal switcher, a singlechip, a liquid crystal display module and a communication module are arranged in the main frame; the signal processing module comprises temperature and humidity processing circuits; the data acquisition module comprises a single-channel A/D inverter, an A/D inverter reference voltage source and a sampling sequential control circuit; the communication module comprises a special RS-232 interface chip; and the singlechip is connected with a computer through the RS-232 interface chip. The instrument integrates data acquisition, graphics display and memory functions, can display the humiture conditions through data and humiture curves, and can be widely applied to various industries and departments, particularly departments needing observation and study on humiture instant variation.
Description
Technical field
The utility model relates to the environment measuring instrument, particularly the ambient temperature and humidity detecting instrument.
Background technology
As everyone knows, the humiture key element of environment receives much attention in industrial and agricultural production and people's daily life.Temperature and humidity measurement instrument product comes out in a large number, but most product only provides real-time humiture data presentation, does not have data acquisition and memory function, more can not change data in time plotting curve.This just makes to use and is subjected to great limitation, particularly those departments that need observe and study humiture instantaneous variation process.
The utility model content
For addressing the above problem, the purpose of this utility model provides a kind of humiture data collecting instrument, this Instrument measuring precision height, good stability, collection data acquisition and graphic presentation and memory function are one, can can be widely used in industry-by-industry and department with the humiture live telecast in operation place with data and real-time intuitively the showing of humiture curve mode, particularly those departments that need observe and study humiture instantaneous variation process.
For achieving the above object, the utility model is by the following technical solutions:
A kind of humiture data collecting instrument comprises main frame and sensing head module, and the sensing head module is made up of sensing head interface plug, cable and probe, it is characterized in that:
Be provided with temperature detecting resistance in the probe, humicap, dual time-base ic and peripheral circuit, first time base circuit in the dual time base circuit is by the 20 No. seven resistance, the 20 No. eight resistance, the 20 No. six electric capacity connects into square-wave generator, second time base circuit is by the 20 No. nine resistance, humicap connects into monostalbe trigger, square-wave generator produces reference signal, this reference signal is exported to its 8 pin by 5 pin of dual time-base ic, thereby make monostalbe trigger produce the width pulse detection signals corresponding with the capacitance of humicap, this pulse detection signals process RC wave filter exports 2 pin of sensing head interface plug, 5 of the two ends of temperature detecting resistance and sensing head interface plug to, 6 pin link to each other;
Be provided with signal processing module, data acquisition module, temperature-humidity signal switch, single-chip microcomputer, LCD MODULE, communication module in the main frame, host housing is provided with RS-232 interface socket, supply socket, sensing head interface socket;
Signal processing module is made up of Temperature Treatment circuit and humidity treatment circuit, the Temperature Treatment circuit is by bridge diagram and first, the second copped wave operational amplifier is formed, bridge diagram has a left side, right two brachium pontis, left side brachium pontis is by No. nine, No. ten, ride on Bus No. 11 resistance is formed, right brachium pontis is by No. seven, No. eight resistance and temperature detecting resistance are formed, a left side, right two brachium pontis respectively with 5 of sensing head interface socket, 6 pin connect, thereby temperature detecting resistance is inserted in the right brachium pontis, the left side of bridge diagram, the difference output end of right brachium pontis is connected with two input ends of the first copped wave operational amplifier respectively, the output terminal one tunnel of the first copped wave operational amplifier is connected with the temperature signal input end of temperature-humidity signal switch through No. six potentiometers, another road is connected the output terminal of the second copped wave operational amplifier and the left side of bridge diagram through No. seven potentiometers with the inverting input of the second copped wave operational amplifier, right brachium pontis and No. five potentiometers connect;
The humidity treatment circuit is by mu balanced circuit, biasing circuit, the first high-precision meter operational amplifier, the second high-precision meter operational amplifier and positive and negative moisture signal switch are formed, mu balanced circuit is composed in series by resistance and stabilivolt, biasing circuit is by No. two, No. three resistance and a potentiometer are composed in series, the input end of biasing circuit is connected on the output terminal of stabilivolt, the sliding end of a potentiometer is connected with the inverting input of the first high-precision meter operational amplifier, the in-phase input end of the first high-precision meter operational amplifier is connected with the sensing head interface socket, the output terminal of the first high-precision meter operational amplifier is through dividing two-way output after No. three potentiometer dividing potential drops, one the tunnel is connected with the inverting input of the second high-precision meter operational amplifier, another road is connected with positive and negative moisture signal switch normal-closed end, the output terminal of the second high-precision meter operational amplifier is connected with positive and negative moisture signal switch Chang Kaiduan, the control end of positive and negative moisture signal switch is connected with the timer port of single-chip microcomputer, and the output terminal of positive and negative moisture signal switch is connected with the moisture signal input end of temperature-humidity signal switch;
Data acquisition module is by single channel A/D transducer, A/D transducer reference voltage source, the sampling time sequence control circuit is formed, the output terminal of A/D transducer reference voltage source is connected with the reference voltage terminal of single channel A/D transducer through the sliding end of No. four potentiometers, the four figures of single channel A/D transducer links to each other with low four mouth lines of the P1 mouth of single-chip microcomputer respectively according to line, four position route selections of single channel A/D transducer link to each other with high four mouth lines of the P1 mouth of single-chip microcomputer respectively, the sampling time sequence control circuit is by rest-set flip-flop and a logic control device, No. two logic control devices, a phase inverter, No. two phase inverters and compositor constitute, rest-set flip-flop is made of Sheffer stroke gate, No. one, No. two logic control device is made of Sheffer stroke gate, No. one, No. two phase inverter is made of Sheffer stroke gate, compositor is made of negative logic or door, the output terminal of rest-set flip-flop and No. one, an input end of No. two logic control devices connects, the output terminal of a logic control device is connected with an interrupt request end of single-chip microcomputer through No. two phase inverters, the output terminal of No. two logic control devices is connected with another interrupt request end of single-chip microcomputer through a phase inverter, the conversion end signal end of single channel A/D transducer and No. one, another input end of No. two logic control devices links to each other, the conversion commencing signal end of single channel A/D transducer links to each other with the output terminal of compositor, two input ends of compositor respectively with No. one, the output terminal of No. two logic control devices connects;
The P0 mouth of single-chip microcomputer is connected with the eight bit data end of LCD MODULE through the eight bit data line, the P0 mouth of single-chip microcomputer is connected with the address port of latch through three bit address lines, the address strobe port of single-chip microcomputer is connected with the address enable port of latch, the address output end mouth of latch selects port and read-write port to be connected with the sheet of LCD MODULE respectively, and the read signal port of single-chip microcomputer, write signal port are connected with the enable port of LCD MODULE through gate circuit; Communication module is made of special-purpose RS-232 interface chip, and the COM port of single-chip microcomputer is connected with the input end of special-purpose RS-232 interface chip, and the output terminal of special-purpose RS-232 interface chip is connected with the RS-232 socket.
Because adopt technique scheme, the utility model has following positive beneficial effect:
This Instrument measuring precision height, good stability, the measurement range precision:
Temperature range :-50-+50 ℃ precision: 0.2 ℃
Humidity range: RH 0-100%
Precision RH 10-95% RH 2%
Sensor module :-40-+40 ℃
Instrument data display precision: temperature: 0.1 ℃, humidity: RH 0.1%
This instrument can be used as local environment and humiture is had the observational record instrument of being strict with occasion, can be widely used in every field, especially the indispensable especially instrument in field that humiture instantaneous variation process is surveyed and studied.
Description of drawings
Fig. 1 is a main frame contour structures synoptic diagram of the present utility model.
Fig. 2 is the contour structures synoptic diagram of the utility model sensor assembly.
Fig. 3 is the circuit theory diagrams of humidity sensor.
Fig. 4 is the circuit theory diagrams of signal processing module.
Fig. 5 is the circuit theory diagrams of data acquisition module, temperature-humidity signal switch, single-chip microcomputer, LCD MODULE, communication module.
Fig. 6 is the synoptic diagram that communications parameter is provided with window.
Fig. 7 is the synoptic diagram of main window (function selecting window).
Fig. 8 is the synoptic diagram of real-time data acquisition.
Fig. 9 is the synoptic diagram of real-time humiture curve display.
Figure 10 is the synoptic diagram that the humiture curve reappears.
Embodiment
Please refer to Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, the utility model is a kind of humiture data collecting instrument, comprise main frame 1 and sensing head module, the sensing head module is by sensing head interface plug P1, cable 6 and probe 5 are formed, be provided with temperature detecting resistance PT100 in the probe 5, humicap C28, dual time-base ic ICM7556 and peripheral circuit, first time base circuit among the dual time base circuit ICM7556 is by the 20 No. seven resistance R 27, the 20 No. eight resistance R 28, the 20 No. six capacitor C 26 connects into square-wave generator, second time base circuit is by the 20 No. nine resistance R 29, humicap C28 connects into monostalbe trigger, square-wave generator produces the reference signal of about 40KHz, this reference signal is exported to its 8 pin by 5 pin of dual time-base ic ICM7556, thereby make monostalbe trigger produce the width pulse detection signals corresponding with the capacitance of humicap C28, this pulse detection signals is through RC (resistance R 30, capacitor C 29) wave filter exports 2 pin of sensing head interface plug P1 to, 5 of the two ends of temperature detecting resistance PT100 and sensing head interface plug P1,6 pin link to each other.
Be provided with signal processing module, data acquisition module, temperature-humidity signal switch, single-chip microcomputer, LCD MODULE, communication module in the main frame, main frame 1 shell is provided with RS-232 interface socket 3, supply socket 2, sensing head interface socket J1 and power switch 4, the RS-232 interface socket is connected with host computer by cable.
Signal processing module is made up of Temperature Treatment circuit and humidity treatment circuit, the Temperature Treatment circuit is by bridge diagram and first, the second copped wave operational amplifier U6, U7 (ICL7650) forms, bridge diagram has a left side, right two brachium pontis, left side brachium pontis is by No. nine, No. ten, ride on Bus No. 11 resistance R 9, R10, R11 forms, right brachium pontis is by No. seven, No. eight resistance R 7, R8 and temperature detecting resistance PT100 form, a left side, right two brachium pontis respectively with 5 of sensing head interface socket J1,6 pin connect, thereby temperature detecting resistance PT100 is inserted in the right brachium pontis, a bridge diagram left side, the difference output end of right brachium pontis is connected with two input ends of the first copped wave operational amplifier U6 respectively, the output terminal one tunnel of the first copped wave operational amplifier U6 is exported to 1 pin of temperature-humidity signal switch U8 (CD4053) through No. six potentiometer VR6 (being used to regulate output voltage amplitude), another road links to each other the output terminal of the second copped wave operational amplifier U7 (ICL7650) and the left side of bridge diagram through No. seven potentiometer VR7 with the inverting input (4 pin) of the second copped wave operational amplifier U7, right brachium pontis and No. five potentiometer VR5 link to each other.
The humidity treatment circuit is by mu balanced circuit, biasing circuit, the first high-precision meter operational amplifier U3 (INA105KP), the second high-precision meter operational amplifier U4 (INA105KP) and positive and negative moisture signal switch U9 (MAX322) form, mu balanced circuit is composed in series by resistance R 1 and stabilivolt W1, biasing circuit is by No. two, No. three resistance R 2, R3 and a potentiometer VR1 are composed in series, the input end of biasing circuit is connected on the output terminal of stabilivolt W1, the sliding end of a potentiometer VR1 is connected with the inverting input (2 pin) of the first high-precision meter operational amplifier U3, the in-phase input end of the first high-precision meter operational amplifier U3 (3 pin) is connected with 2 pin of sensing head interface socket J1, the output terminal of the first high-precision meter operational amplifier U3 (6 pin) is through dividing two-way output after No. three potentiometer VR3 dividing potential drops, one the tunnel is connected with the inverting input of the second high-precision meter operational amplifier U4, another road is connected with positive and negative moisture signal switch U9 normal-closed end NO2, the output terminal of the second high-precision meter operational amplifier U4 is connected with positive and negative moisture signal switch U9 Chang Kaiduan NO1, the control end IN1 of positive and negative moisture signal switch U9, IN2 is connected the output terminal COM1 of positive and negative moisture signal switch U9 with the timer port T0 of single-chip microcomputer U1, COM2 is connected with the moisture signal input end Y0 of temperature-humidity signal switch U8.
Data acquisition module is by single channel A/D transducer U2 (MC14433), A/D transducer reference voltage source U5 (MC1403), the sampling time sequence control circuit is formed, the output terminal (2 pin) of A/D transducer reference voltage source U5 is connected with the reference voltage terminal VR of single channel A/D transducer U2 through the sliding end of No. four potentiometer VR4, the four figures of single channel A/D transducer U2 is according to line Q0, Q1, Q2, Q3 respectively with low four mouth line P1.0 of the P1 mouth of single-chip microcomputer U1, P1.1, P1.2, P1.3 links to each other, four position route selection DS1 of single channel A/D transducer U2, DS4, DS2, DS3 respectively with high four mouth line P1.4 of the P1 mouth of single-chip microcomputer U1, P1.5, P1.6, P1.7 links to each other.
The sampling time sequence control circuit is by rest-set flip-flop and a logic control device, No. two logic control devices, a phase inverter, No. two phase inverters and compositor constitute, rest-set flip-flop is by Sheffer stroke gate U12A, U12B constitutes, No. one, No. two logic control devices are respectively by Sheffer stroke gate U13C, U13D constitutes, No. one, No. two phase inverters are respectively by Sheffer stroke gate U13A, U13B constitutes, compositor is made of negative logic or door U12C, the output terminal of rest-set flip-flop and No. one, No. two logic control device U13C, the input end of U13D connects, the output terminal of a logic control device U13C is connected with the interrupt request end INT0 of single-chip microcomputer U1 through No. two phase inverter U13B, the output terminal of No. two logic control device U13D is connected with the interrupt request end INT1 of single-chip microcomputer through a phase inverter U13A, the conversion end signal end EOC of single channel A/D transducer U2 and No. one, No. two logic control device U13C, another input end of U13D links to each other, the conversion commencing signal end DU of single channel A/D transducer U2 links to each other with the output terminal of compositor U12C, two input ends of compositor U12C respectively with No. one, No. two logic control device U13C, the output terminal of U13D connects, the P0 mouth of single-chip microcomputer U1 is connected with the eight bit data end of LCD MODULE LCD through the eight bit data line, the P0 mouth of single-chip microcomputer U1 is connected with the address port of latch U11 through three bit address lines, the address strobe port ALE of single-chip microcomputer U1 is connected with the address enable port LE of latch U11, the address output end mouth Q6 of latch U11, Q7 selects port RS and reading-writing port R/W to be connected with the sheet of LCD MODULE LCD respectively, the read signal port RD of single-chip microcomputer U1, write signal port WR is connected with the Enable Pin E of LCD MODULE LCD through gate circuit.
Communication module is made of special-purpose RS-232 interface chip U14 (MAX202ECPE), the COM port RXD of single-chip microcomputer U1, TXD are connected with the input end (9 pin, 10 pin) of special-purpose RS-232 interface chip U14, and the output terminal of special-purpose RS-232 interface chip U14 (8 pin, 7 pin) is connected with RS-232 socket JP4 (3 pin, 2 pin).
The CMOS dual time base device of dual time-base ic ICM7556 suitable two 555 (famous time basis set becomes chip), suitable one 555 of ICM7556 left side 1 to 6 pin, it is about 40KHz square-wave oscillator that it and the resistance R 27 on the left of it, R28, capacitor C 26 constitute frequencies.ICM7556 right side 8-13 pin quite another 555, resistance R 29, R31, the humicap C28 on it and its right side constitute monostable circuit.Monostable is triggered by square wave, and the width of monostable output signal is by resistance R 29, humicap C28 decision.Humicap C28 uses as humidity sensor.Resistance R 31 is the resistance that resistance is 10 megaohms, and its effect is the discharge resistance of humicap C28.
The monostable circuit output signal obtains the DC level that changes with humidity through resistance R 32, capacitor C 27 filtering from F2 (9 pin) output terminal of dual time-base ic U15 (ICM7556).Temperature shown in Figure 3, humidity sensor all are contained in the probe shown in Figure 25.
On the temperature and humidity signal being handled of signal processing circuit is to satisfy the requirement of single channel A/D transducer.Temperature detecting resistance PT100 inserts bridge diagram by sensing head interface socket J1 and sensing head interface plug P1.The U6 output of the first copped wave integrated operational amplifier is regulated output through No. six potentiometer VR6, and first, second copped wave integrated operational amplifier U6, U7 are negative-feedback amplifiers, and feedback network as shown in Figure 4.The output of two-stage amplifier U6, U7 has the RC filter network respectively, prevents the copped wave interference.The effect of the second copped wave integrated operational amplifier U7 is for electric bridge provides voltage source, in order to improve the linearity of sensor, belongs to the hardware linear compensation.The input end 4 of the second copped wave integrated operational amplifier U7 has two potentiometer VR7, VR3 to be used for regulating the amplitude of its input, makes output about-3V.The adjusting of potentiometer VR7 output amplitude directly influences the linear compensation degree.High-end main the adjusting by potentiometer VR7 compensates; Low side is mainly regulated compensation by potentiometer VR3, and compensation is finished in calibration process.
The moisture signal treatment circuit is made up of two-stage high-precision meter integrated operational amplifier: the first high-precision meter integrated operational amplifier U3 is that difference is amplified, and its zero point and amplification output are regulated by potentiometer VR1 and potentiometer VR3 respectively, the output positive level.
The second high-precision meter integrated operational amplifier U4 is-1 times of amplifier (phase inverter) of first order output, the negative humidity level of output.Because humidity does not have negative value, thus the temperature value of once sampling when single channel A/D transducer when negative, if followed by the humidity value of sampling next time for just, at this moment the A/D transducer is not worked; If the humidity value of current sampling equally is a negative value with temperature polarity, single channel A/D transducer is with regard to operate as normal.The artificial humidity negative level that produces is exactly to be when surveying subzero temperature, the requirement of bonding passage A/D transducer alternating sampling operate as normal.
Concrete enforcement is as follows: positive and negative moisture signal switch U9 (MAX322) is one two knife-like switch, often opens for one normally closed one.The output terminal of two cuttves connects together, and its effect is the performer as the output of positive and negative moisture signal.
The control end of two knife-like switches is provided by the timer port T0 of single-chip microcomputer U1.When temperature is timing, the T0 output low level, positive and negative moisture signal switch U9 is failure to actuate, normal-closed end output positive level.
When temperature when negative, T0 export high level, positive and negative moisture signal switch U9 action, normal-closed end disconnects, the Chang Kaiduan closure is exported negative level.Just temperature is controlled positive and negative moisture signal switch U9 open and close, temperature just is output as for timing humidity, temperature humidity when negative is output as negative, is operated in that temperature-humidity signal polarity must consistent requirement under the alternating sampling situation thereby adapt to single channel A/D transducer U2 (MC14433).
The A/D transformed value of negative moisture signal get on the occasion of because humidity does not have negative value, show and also do not establish sign bit.The effect of positive and negative in a word moisture signal switch U9 (MAX322) is to allow the output polarity of moisture signal with the change in polarity of temperature, and bonding passage A/D transducer U2 can operate as normal when the humiture alternating sampling.Temperature signal after the amplification and deliver to two input ends, 1 pin Y1 and the 2 pin Y0 that temperature-humidity signal switch U8 (CD4053) cutter two among Fig. 5 is thrown switch respectively through the moisture signal of positive and negative moisture signal switch U9 (MAX322), what the output terminal Y of wait gate level control moisture temperature signal switch replaced is connected with Y0 with two input end Y1, delivers to the signal level input end VX of single channel A/D transducer U2 among Fig. 5 then.
Principle of work of the present utility model is as follows:
Single-chip microcomputer U1 adopts 89C51.This apparatus measures key element is humiture two key elements, and the input of the signal of single channel A/D transducer U2 is single key element.Therefore need take mode, make its timesharing finish the A/D conversion of two key elements the humiture alternating sampling.
Single channel A/D transducer U2 (MC14433) is the A/D transducer of binary-coded decimal output.It has an A/D conversion to begin (startup) input end DU, also has an A/D conversion to finish output terminal EOC.
When single channel used, very simple, signal was sent the VX end to, and EOC directly links to each other with DU, with the end pulse enable conversion next time of this conversion, can periodic duty get up.
When two element signals are used single channel, from the time, will control to some extent, make two these passages of element timesharing alternately used.
Fig. 5 uses two 4-2 Sheffer stroke gate device 74LS00 to finish this function.
A/D conversion humiture two element alternating sampling principles are as follows: single-chip microcomputer U1 initialize routine preset timer t1 port is a high level, make that 3 pin of Sheffer stroke gate U12A are low level in the rest-set flip-flop, 6 pin of U12B are high level, at this moment, input end 12 pin of Sheffer stroke gate U12D, 13 pin are high level, the output terminal of Sheffer stroke gate U12D is a low level, make rest-set flip-flop more stable, this high level is delivered to the control end B of temperature-humidity signal switch U8 (CD4053), guarantee the 3 pin VX end of moisture signal connection single channel A/D transducer U2, wait for the startup of moisture signal A/D conversion.
At this moment the high level by 14 pin of single channel A/D transducer U2 next conversion end the 6 pin of Sheffer stroke gate U12B in pulse EOC and the rest-set flip-flop is carried on two input ends of logic control device U13C simultaneously, with its gating, 8 pin of logic control device U13C produce negative pulse, produce positive pulse (interrupt INT 0) through phase inverter U13B at 6 pin, interrupt INT 0 is after single-chip microcomputer U1 application, interrupt routine is read the temperature data of A/D conversion to the on-chip memory RAM of single-chip microcomputer U1, waits for its data call and sends to RS-232 interface.Interrupt INT 0 is also as the starting impulse of humidity A/D conversion on the horizon.After temperature data ran through, single-chip microcomputer U1 sent the humiture data to the RS-232 interface of computing machine.Interrupt routine INT0 puts 0 (low level) with the 15 pin T1 of single-chip microcomputer U1 at last, at this moment rest-set flip-flop counter-rotating, state changes, and 3 pin of phase inverter U13A produce positive pulse (interrupt INT 1), thereby enter following one-period: the humidity sense data, temperature is carried out the cycle of A/D conversion.
The interrupt routine of two interrupt INT 0 of single-chip microcomputer U1 and INT1 is respectively the humiture data to be read in the ram in slice.As seen the alternating sampling of humiture two elements is results that software and hardware cooperates operation.
U5 among Fig. 5 (MC1403) is a reference voltage source, is used as the reference voltage of single channel A/D transducer, and VR3 regulates by potentiometer.
HY-1601C among Fig. 5 is a liquid crystal display device.It is the public technology of software and hardware maturation.U11 (74LS373) is a data latches.It latchs three low order address of single-chip microcomputer, and three gate circuits of it and U10 (74LS00) are united and generated desired three the control signal sheets of liquid crystal display and select RS, read and write R/W, enable the E signal.
U14 among Fig. 5 (MAX202) is the RS-232 interface chip, and it is for using with the computing machine communication.What deserves to be mentioned is that here sending the humiture data to computing machine is to send time after the interrupt routine of interrupt INT 0 runs through temperature data.
The liquid crystal display of humiture data is arranged on this instrument host, but off line use as the humiture display instrument, with after computing machine is connected, can connect machine work by RS-232 interface in real time.
Window control is adopted in computer operation, rather than menu control.More directly perceived like this, more just what operation.Please refer to Fig. 6, communications parameter is provided with two communications parameter options in the window:
[serial ports is selected (1,2,3,4)].Digitized representation instrument host in the bracket and serial ports of computers channel number.If your channel number is 1 (great majority uses 1), please in input frame, fill out 1.
Communications parameter (19200, n, 8,1)] this parameter fixes.After channel number is filled in, click [communication connection], system enters main window (function selecting window), as shown in Figure 7.
Main window is the core window, enters three subwindows by it.The functions of use that each subwindow is corresponding different.Click any one in three functions of use windows, just enter corresponding functions of use window.There is one [returning main window] button in the lower right corner of each subwindow, clicks it, can return main window from the place subwindow, can enter other function subwindow easily again, selects new function.There is [withdrawing from] button on the right of each subwindow [returning main window], clicks it, can log off.
Introduce three function subwindows below respectively:
Function subwindow one: real-time data acquisition,
At main window, click [real-time data acquisition], enter function subwindow picture shown in Figure 8.On the picture right side parameter input frame and button are arranged: [sampling time interval] input frame is arranged, and the input data sampling time interval serves as that to select data, unit at interval be ms with integer second.As 1 second at interval, then import 1000, the scope of sampling time interval is 1 to 10 second.
Click [gather and start] button, it is the data acquisition of interlude, temperature, humidity that display screen just occurs with the input sample time interval data.The rightmost row order of humiture data numeral is the sequence number of data among Fig. 8, will use it in data and profile memory and reproduction.Click [time-out] button and can suspend data acquisition.Click [continuation] button and can continue data acquisition.[preservation] button is provided with for preserving data file.After clicking [preservation], filename and path are set, preserve data file in disk.
Click [returning main window] button, screen returns the main window picture immediately.Clicking [withdrawing from] button logs off.
Function subwindow two: real-time humiture curve,
In the function choosing-item of main window, [humiture curve in real time] arranged, click [humiture curve in real time], enter function subwindow picture shown in Figure 9.
Two curves are arranged on picture: red is moisture curve; Blue look be temperature curve.The horizontal ordinate of curve is the time, and unit is minute.The thick lattice of its scale are minute; Thin lattice are 0.2 minute (only having drawn thick lattice among Fig. 9).Ordinate is a temperature and humidity, and scope is-50-100, and unit temperature is ℃; Humidity RH is %.The thick lattice of its scale are 10; Thin lattice are 2 (only having drawn thick lattice among Fig. 9).
There is [sampling time interval coefficient j] and [observation time coefficient n] input frame in upper right side at Fig. 9 picture, and j and n are positive integers.J represents the multiple of the sampling time interval that the instrument device is intrinsic.N represents the number of times that whole observation time introversion line chart switches, i.e. number of pages.The selection of [sampling time interval coefficient j] will be according to the instantaneous variation degree of the humiture of observing, and fierce selecting is littler; Mild choosing more greatly, in order to avoid take big storage space.The observation time of every width of cloth figure is 5 minutes * j.Total observation time is 5 minutes * j * n.
Rationally after the parameter that input is selected, click [startup] button on its right, begin the time dependent humiture curve of real-time rendering immediately.In [observation time demonstration] frame, show total observation time simultaneously.Click [stopping] button, can stop operation at any time.Illustrate that some data of curve plotting are recorded in the text box of [real-time data acquisition] window.Rightmost [preservation curve] button is clicked it, and the window of the curve that will draw switches to [real-time data acquisition] window immediately.Preserve the data of curve then by the method for preserving the data file of gathering in real time.
Function subwindow three: the humiture curve reappears:
At main window, click [reproduction of humiture curve], enter function subwindow picture shown in Figure 10.
As can be seen from Figure 10: this picture divides left and right sides two parts, and what reproduced on the left side is real-time humiture data acquisition set.What the right showed is the curve of being drawn by left data, more directly perceived like this, and the humiture curve reappears to be finished in two steps: in the upper left corner of picture, click [opening] button.Additional immediately window that opens file in the window.After selecting path and filename, click [opening] button in [window opens file] window again, in the text box on Figure 10 left side, reproduce the data acquisition of the curve file of being preserved.In the upper right side of window, the input frame of [sampling time interval coefficient j] is arranged, it is same parameter with [the sampling time interval coefficient j] of [humiture curve in real time] window.When forgetting, can learn that adjacent difference second is exactly [sampling time interval coefficient j] from data second of the curve data on the left side.Also have [coefficient n hour sweep time] input frame, require positive integer of input.The multiple of its expression fundamental curve sweep time (60 minutes).Last [input curve is counted] input frame is found out in the sequence number input frame of desired segment of curve from the sequence number on the right of the curve data of left side text box.The input of three parameters finishes, and clicks [curve reproduction] button.The curve that desire is reappeared appears on the picture immediately.The maximal value, minimum value and the mean value that show the humiture of selected segment of curve simultaneously in the bottom of Figure 10 immediately.
In order to observe curve more subtly, whole observation time is divided into six time periods, following six the selection buttons of curvilinear frame are corresponding with it.Click them, can the meticulous humiture change curve of observing the different periods.The humiture curve has wide range of applications in real time, reappears its historical record, and it is also very valuable to carry out follow-up study.
Claims (1)
1. a humiture data collecting instrument comprises main frame and sensing head module, and the sensing head module is made up of sensing head interface plug, cable and probe, it is characterized in that:
Be provided with temperature detecting resistance in the probe, humicap, dual time-base ic and peripheral circuit, first time base circuit in the dual time base circuit is by the 20 No. seven resistance, the 20 No. eight resistance, the 20 No. six electric capacity connects into square-wave generator, second time base circuit is by the 20 No. nine resistance, humicap connects into monostalbe trigger, square-wave generator produces reference signal, this reference signal is exported to its 8 pin by 5 pin of dual time-base ic, thereby make monostalbe trigger produce the width pulse detection signals corresponding with the capacitance of humicap, this pulse detection signals process RC wave filter exports 2 pin of sensing head interface plug, 5 of the two ends of temperature detecting resistance and sensing head interface plug to, 6 pin link to each other;
Be provided with signal processing module, data acquisition module, temperature-humidity signal switch, single-chip microcomputer, LCD MODULE, communication module in the main frame, host housing is provided with RS-232 interface socket, supply socket, sensing head interface socket;
Signal processing module is made up of Temperature Treatment circuit and humidity treatment circuit, the Temperature Treatment circuit is by bridge diagram and first, the second copped wave operational amplifier is formed, bridge diagram has a left side, right two brachium pontis, left side brachium pontis is by No. nine, No. ten, ride on Bus No. 11 resistance is formed, right brachium pontis is by No. seven, No. eight resistance and temperature detecting resistance are formed, a left side, right two brachium pontis respectively with 5 of sensing head interface socket, 6 pin connect, thereby temperature detecting resistance is inserted in the right brachium pontis, the left side of bridge diagram, the difference output end of right brachium pontis is connected with two input ends of the first copped wave operational amplifier respectively, the output terminal one tunnel of the first copped wave operational amplifier is connected with the temperature signal input end of temperature-humidity signal switch through No. six potentiometers, another road is connected the output terminal of the second copped wave operational amplifier and the left side of bridge diagram through No. seven potentiometers with the inverting input of the second copped wave operational amplifier, right brachium pontis and No. five potentiometers connect;
The humidity treatment circuit is by mu balanced circuit, biasing circuit, the first high-precision meter operational amplifier, the second high-precision meter operational amplifier and positive and negative moisture signal switch are formed, mu balanced circuit is composed in series by resistance and stabilivolt, biasing circuit is by No. two, No. three resistance and a potentiometer are composed in series, the input end of biasing circuit is connected on the output terminal of stabilivolt, the sliding end of a potentiometer is connected with the inverting input of the first high-precision meter operational amplifier, the in-phase input end of the first high-precision meter operational amplifier is connected with the sensing head interface socket, the output terminal of the first high-precision meter operational amplifier is through dividing two-way output after No. three potentiometer dividing potential drops, one the tunnel is connected with the inverting input of the second high-precision meter operational amplifier, another road is connected with positive and negative moisture signal switch normal-closed end, the output terminal of the second high-precision meter operational amplifier is connected with positive and negative moisture signal switch Chang Kaiduan, the control end of positive and negative moisture signal switch is connected with the timer port of single-chip microcomputer, and the output terminal of positive and negative moisture signal switch is connected with the moisture signal input end of temperature-humidity signal switch;
Data acquisition module is by single channel A/D transducer, A/D transducer reference voltage source, the sampling time sequence control circuit is formed, the output terminal of A/D transducer reference voltage source is connected with the reference voltage terminal of single channel A/D transducer through the sliding end of No. four potentiometers, the four figures of single channel A/D transducer links to each other with low four mouth lines of the P1 mouth of single-chip microcomputer respectively according to line, four position route selections of single channel A/D transducer link to each other with high four mouth lines of the P1 mouth of single-chip microcomputer respectively, the sampling time sequence control circuit is by rest-set flip-flop and a logic control device, No. two logic control devices, a phase inverter, No. two phase inverters and compositor constitute, rest-set flip-flop is made of Sheffer stroke gate, No. one, No. two logic control device is made of Sheffer stroke gate, No. one, No. two phase inverter is made of Sheffer stroke gate, compositor is made of negative logic or door, the output terminal of rest-set flip-flop and No. one, an input end of No. two logic control devices connects, the output terminal of a logic control device is connected with an interrupt request end of single-chip microcomputer through No. two phase inverters, the output terminal of No. two logic control devices is connected with another interrupt request end of single-chip microcomputer through a phase inverter, the conversion end signal end of single channel A/D transducer and No. one, another input end of No. two logic control devices links to each other, the conversion commencing signal end of single channel A/D transducer links to each other with the output terminal of compositor, two input ends of compositor respectively with No. one, the output terminal of No. two logic control devices connects;
The P0 mouth of single-chip microcomputer is connected with the eight bit data end of LCD MODULE through the eight bit data line, the P0 mouth of single-chip microcomputer is connected with the address port of latch through three bit address lines, the address strobe port of single-chip microcomputer is connected with the address enable port of latch, the address output end mouth of latch selects port and read-write port to be connected with the sheet of LCD MODULE respectively, and the read signal port of single-chip microcomputer, write signal port are connected with the enable port of LCD MODULE through gate circuit;
Communication module is made of special-purpose RS-232 interface chip, and the COM port of single-chip microcomputer is connected with the input end of special-purpose RS-232 interface chip, and the output terminal of special-purpose RS-232 interface chip is connected with the RS-232 socket.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205308196U CN201780680U (en) | 2010-09-15 | 2010-09-15 | Humiture data acquisition instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205308196U CN201780680U (en) | 2010-09-15 | 2010-09-15 | Humiture data acquisition instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201780680U true CN201780680U (en) | 2011-03-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205308196U Expired - Fee Related CN201780680U (en) | 2010-09-15 | 2010-09-15 | Humiture data acquisition instrument |
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| Country | Link |
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| CN (1) | CN201780680U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2012171242A1 (en) * | 2011-06-17 | 2012-12-20 | 明高五金制品（深圳）有限公司 | Roasting temperature monitoring apparatus and system |
| CN104390717A (en) * | 2014-11-21 | 2015-03-04 | 广西智通节能环保科技有限公司 | Resistance bridge temperature measuring instrument |
| CN105092064A (en) * | 2015-09-19 | 2015-11-25 | 成都汇骏盟邦科技有限公司 | Temperature detector device specialized for polar exploration |
| CN109470747A (en) * | 2018-12-28 | 2019-03-15 | 无锡华润矽科微电子有限公司 | Hygrometer circuit and the corresponding method for realizing moisture measurement |
| CN109655169A (en) * | 2018-11-14 | 2019-04-19 | 中国空空导弹研究院 | A kind of miniaturization temperature measuring circuit |
| CN111948973A (en) * | 2020-09-23 | 2020-11-17 | 黄耀明 | Power socket control system for humidity and electric leakage induction |
| CN113359672A (en) * | 2021-06-17 | 2021-09-07 | 南方电网数字电网研究院有限公司 | Electric power system chip protection control circuit board and secondary equipment in electric power system |
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2010
- 2010-09-15 CN CN2010205308196U patent/CN201780680U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012171242A1 (en) * | 2011-06-17 | 2012-12-20 | 明高五金制品（深圳）有限公司 | Roasting temperature monitoring apparatus and system |
| CN104390717A (en) * | 2014-11-21 | 2015-03-04 | 广西智通节能环保科技有限公司 | Resistance bridge temperature measuring instrument |
| CN105092064A (en) * | 2015-09-19 | 2015-11-25 | 成都汇骏盟邦科技有限公司 | Temperature detector device specialized for polar exploration |
| CN109655169A (en) * | 2018-11-14 | 2019-04-19 | 中国空空导弹研究院 | A kind of miniaturization temperature measuring circuit |
| CN109470747A (en) * | 2018-12-28 | 2019-03-15 | 无锡华润矽科微电子有限公司 | Hygrometer circuit and the corresponding method for realizing moisture measurement |
| CN109470747B (en) * | 2018-12-28 | 2024-04-26 | 华润微集成电路(无锡)有限公司 | Hygrometer circuit and corresponding method for realizing humidity measurement |
| CN111948973A (en) * | 2020-09-23 | 2020-11-17 | 黄耀明 | Power socket control system for humidity and electric leakage induction |
| CN113359672A (en) * | 2021-06-17 | 2021-09-07 | 南方电网数字电网研究院有限公司 | Electric power system chip protection control circuit board and secondary equipment in electric power system |
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Granted publication date: 20110330 Termination date: 20130915 |