CN2618162Y - Random environment measuring instrument - Google Patents
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- CN2618162Y CN2618162Y CN 03217472 CN03217472U CN2618162Y CN 2618162 Y CN2618162 Y CN 2618162Y CN 03217472 CN03217472 CN 03217472 CN 03217472 U CN03217472 U CN 03217472U CN 2618162 Y CN2618162 Y CN 2618162Y
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Abstract
The utility model relates to an environmental radon determinator, belonging to the gas detecting instrument technical field. The utility model is designed for solving the technical problem of providing an instrument, which can not only detect the radon concentration and equilibrium factor rapidly, but also has the advantages of large measurement range, extensive applicability, high accuracy and convenience for use. The utility model adopts the technical proposals that: the utility model comprises a sampling part and a sample treatment part, wherein the sampling part comprises a film sampling tablet, an electrode plate, a cable and a high voltage power supply; the sampling tablet is sleeve-arranged on the electrode plate which is connected with the cable and the cable is connected with the high voltage power supply; the sample treatment part comprises a detector, an amplifying circuit, a pulse analyzer, a microprocessor, a latch, a memory and a decoder, wherein the output end of the detector is connected with the amplifying circuit with the output end connecting to the pulse analyzer; then the pulse analyzer is connected with the microprocessor and the decoder, wherein the microprocessor is connected with the latch and the memory respectively through data buses; the microprocessor and the decoder are also connected with the operating keyboard, the display device and the printer.
Description
Technical field
The utility model relates to a kind of environment radon gas detecting instrument, belongs to the gas detecting instrument technical field.
Background technology
Measure airborne radon gas and be the important process content in the environmental monitoring, in the radon gas monitoring the multiple metering system and the different method of samplings are arranged, the operator can select according to different measurement requirement and condition, and division is as follows.
1, metering system
Measuring method and instrument to radon and short-lived daughter thereof are varied, can be divided into following three classes again according to sampling characteristics:
(1) instantaneous formula metering system
Gather the air sample (perhaps gathering the gaseous sample in the soil, the gaseous sample in the water) of tested air space at short notice, the maximum duration of sampling can not surpass 30 minutes usually, and its measurement result is only represented the value of this measured medium in a flash or in the short time period of sampling.
(2) accumulation formula metering system
With time and even the longer time continuous sampling of a few hours, a couple of days or tens of days, the sampling time is selected according to the radon concentration level, and measurement result is represented the mean value of measured medium in the sampling time section.
(3) continous way metering system
Instrument sensor (detector) directly contacts with the air of measured position, the radon concentration of the tested air of continuous coverage, and measured value changes with the variation of tested radon concentration; This measuring method need not sampled.
2, the method for sampling
In instantaneous formula metering system, sample mode mainly contains:
A, with sensor (commonly used have ZnS scintillation chamber, ionization chamber) as sampling thief, container is vacuumized the back extracts tested air sample.The alpha ray of the radon of sample and daughter radiation thereof makes air generation ionization or makes scintillator generation flash of light and form detectable signal.
B, two filter membrane sampling method: extract tested air and adopt flowmeter to determine the volume of air that extracts with air pump.Air enters diffuser casing through the air intake opening filter membrane, flows out in the atmosphere through the gas outlet filter membrane then.Air is when flowing through the first road filter membrane, and the airborne radon daughter that is suspended in that has originally produced is attached on filter membrane.Air when flowing through the second road filter membrane, air after by the first road filter membrane to through the second road filter membrane time the new radon daughter that produces of this section period be attached on the second road filter membrane.These twice have been adhered to the filter membrane of radon daughter and measured, can record the balance factor of radon concentration and radon and its daughter.
C, tested air is adopted container into certain volume, in container, be provided with the sampling sheet or the post pole body of static or negative high voltage, be the radon daughter that the positive ion state exists in the container and under electric field action, be adsorbed on the sampling sheet, by sampling sheet or post pole body measured radon concentration.The sensitivity of this quasi-instrument is subjected to the restriction of the volume of sampling container equally.
The above-mentioned method of sampling all is to measure by the air sample of gathering set amount (volume), and the volume of sampling container is generally 0.5L～1.5L, and sample size is little.Though flow gas sampling sample size is very big, sample is very short in the residence time of diffuser casing.Thereby these method of samplings have determined that the sensitivity of instrument can not be very high, make the accuracy of measuring under the ENVIRONMENT RADON CONTENT level too on the low side or be not suitable for using.
The method of sampling that the accumulation formula is measured is common active carbon adsorption, track method and α thermoluminescent method.
The method of sampling that adopts the accumulation formula to measure all is the effective ways that can realize that under the very low environment of radon level pin-point accuracy is measured, and its weak point is an inefficiency, and the operation of measuring process is more and cumbersome.
When adopting the above-mentioned measuring method and the method for sampling to measure, a very important problem is to consider measurement parameter.For example, detect for the radon of house, in standard GB/T16146-1995, the amount that requires to provide is a balance equivalent radon concentration, thereby is used for the instrument that the house radon detects and should has the ability of measuring radon concentration and these two parameters of balance factor simultaneously.In the common emanometer device of China, the instrument kind that can be used for measuring simultaneously these two parameters mainly is the instrument (as the FT648 type) that adopts two filter membrane samplings seldom.In addition, the instrument of making sensor with the ZnS scintillation chamber also can be measured these two parameters simultaneously.This two quasi-instrument is all relatively heavier, carries inconvenience, and inefficiency (survey two parameters simultaneously and need a few hours).Simultaneously, because instrumental sensitivity is not high, the accuracy of measuring balance factor under house radon level is not high.
Summary of the invention
Technical problem to be solved in the utility model provides a kind ofly can measure simultaneously radon concentration and balance factor, measurement range is big, applicability is wide, accuracy is high and easy to use instrument fast, especially measures above-mentioned two parameters under quite low ENVIRONMENT RADON CONTENT level simultaneously fast.
The technical scheme that solves above-mentioned alleged technical matters is: this environment radon gas analyzer is made up of sampling section, sample processing part; Sampling section is made up of sample sheet, battery lead plate, cable, support, high-voltage power supply of film, and film sampling sheet is enclosed within on the battery lead plate, and battery lead plate is connected with cable, and support is connected with battery lead plate, and cable is in the support central cavity, and cable is connected with high-voltage power supply; Sample processing part is made up of detector, amplifying circuit, pulse analyzer, code translator, microprocessor, storer, latch, Sheffer stroke gate, the input end of the output termination amplifying circuit of detector, the input end of the output termination pulse analyzer of amplifying circuit, pulse analyzer connects code translator and microprocessor again, and microprocessor through bus is connected with latch, storer, Sheffer stroke gate respectively;
Above-mentioned detector is made up of two Au Si surface barrier detectors, and they are placed face to face, and the centre is provided with a sample disc;
Above-mentioned amplifying circuit is made up of pre-amplification circuit and operational amplification circuit, and pre-amplification circuit respectively is divided into upper and lower two parts, connects the output terminal of two Au Si surface barrier detectors of above-mentioned detector respectively; The top of pre-amplification circuit is by triode T1, T2, T3, resistance R 1, R2, R3, R4, R5, R6, R7, R8, capacitor C 1, C2, C3, C4 forms, the base stage of triode T1 connects signal input part, grounded emitter, the emitter of collector connecting transistor T2, the base stage of triode T2 is connected between power supply V+ and the ground, the base stage of collector connecting transistor T3, the emitter of triode T3 connects signal input part by resistance R 6, also by resistance R 7 ground connection, collector is by capacitor C 4, resistance R 8 is connected on signal output part, resistance R 1 one termination 24V power supplys, another termination signal input part, resistance R 2, R3 is connected between triode T2 base stage and power supply V+ and the ground, resistance R 4, R5 is connected on triode T2 respectively, between the collector of T3 and the power supply V+, capacitor C 1 is connected on signal input part, capacitor C 2, C3 is connected across resistance R 2 respectively, the two ends of R6; The bottom of pre-amplification circuit is by triode T4, T5, T6, resistance R 11, R12, R13, R14, R15, R16, R17, R18, and capacitor C 9, C10, C11, C12 form, and its connected mode is identical with top; Operational amplification circuit is by transport and placing device U1, U2, U3, resistance R 9, R10, R19, R20, R21, capacitor C 5, C6, C7, C8 forms, end of oppisite phase 2 pin of transport and placing device U1 connect the signal output part of pre-amplification circuit, in-phase end 3 pin are by parallel resistor R9, capacitor C 5 ground connection, 4 pin meet power supply V-, 8 pin meet power supply V+, output terminal 1 pin connects end of oppisite phase 6 pin of the transport and placing device U2 of subordinate by capacitor C 6, in-phase end 5 pin of U2 are by resistance R 19 ground connection, output terminal 7 pin connect end of oppisite phase 2 pin of the transport and placing device U3 of subordinate, in-phase end 3 pin of U3 are by resistance R 21 ground connection, 4 pin meet power supply V-, 8 pin meet power supply V+, 1 pin is an output signal end, resistance R 10 is slip variable resistors, its stiff end connects transport and placing device U1 output terminal and ground respectively, the input end of slip termination transport and placing device U2, be connected across between 6 pin and 7 pin of transport and placing device U2 after resistance R 20 and capacitor C 7 are in parallel, capacitor C 8 is connected on the output signal end of transport and placing device U3;
Above-mentioned pulse analyzer is made up of comparer U4, monostable trigger U5, U6, sampling holder U7, analog to digital converter U13, Sheffer stroke gate F1, phase inverter F2, F3, resistance R 22～R30, capacitor C 13～C18; End of oppisite phase 2 pin of comparer U4 meet power supply VCC by signal output part, in-phase end 3 pin that capacitor C 13 connects above-mentioned amplifying circuit by 1 pin, 4 pin ground connection, 8 pin that resistance R 24 meets 2.5V reference voltage, the steady trigger U5 of output terminal 1 pin order, 1 pin of comparer U4 is also by resistance R 25 ground connection, resistance R 22, R23 are in series, its contact connects 2 pin of comparer U4, two ends connect power supply VCC and ground respectively, and capacitor C 14 is connected between 3 pin and output terminal of comparer U4; 2 pin of monostable trigger U5 are 1 pin, 9 pin that input end 5 pin, 13 pin that 12 pin, 4 pin that 3 pin meet U6 meet Sheffer stroke gate F1 meet U6 of 10 pin of the steady trigger U6 of order and microprocessor U8 respectively, 15 pin meet power supply VCC by resistance R 28, and capacitor C 16 is connected between 14 pin and 15 pin; 7 pin of monostable trigger U6 meet power supply VCC by resistance R 29, and 11 pin also meet power supply VCC, and capacitor C 17 is connected between 6 pin and 7 pin, and 12 pin of monostable trigger U6 connect 8 pin of sampling holder; 3 pin of sampling holder also meet 2 pin and power supply V+, connect 6 pin by capacitor C 18 by resistance R 27, R30 by signal output part, 7 pin ground connection, 7 pin that capacitor C 15 connects above-mentioned amplifying circuit, and 5 pin connect 5 pin of analog to digital converter U13; 32～39 pin, 3,4,7,8,13,14,17,18 pin of latch U9 and 13～15,17～21 pin of storer U11 of 8,14,15,17～21 pin of analog to digital converter U13 by bus interface microprocessor U8, its 10 pin connect clock signal input, 12 pin and connect that 5V reference voltage, 16 pin ground connection, 22 pin connect code translator, 6 pin connect 6 pin of Sheffer stroke gate F1,6 pin that 9 pin meet phase inverter F2,9 pin that 7 pin meet phase inverter F3; Another input end 4 pin of Sheffer stroke gate F1 connect 2 pin of microprocessor U8, and 5 pin of phase inverter F2 connect code translator, and 8 pin of phase inverter F3 connect 13 pin of microprocessor U8;
Above-mentioned code translator comprises U10, U11 two block decoding chips, and 13 pin of U10 connect 5 pin of phase inverter F2,5 pin connect 8 pin of Sheffer stroke gate F4,6 pin that 6 pin meet U11,22 pin of the 13 pin analog to digital converter U13 of U11;
21～28 pin of above-mentioned microprocessor U8 connect 2,5,6,9,12,15,16,19 pin of latch U9,2～12,23,25～28 pin of storer U12,1～6,11,12 pin of Sheffer stroke gate F4 respectively by bus; Resistance R 31, R32, R33, R34 form serial loop, and the tie point of R32, R33 meets power supply VCC, and the tie point of R34, R31 connects 8 pin that control high pressure, R33, R34 tie point meet microprocessor U8, and the tie point of R31, R32 connects 7 pin of microprocessor U8;
30 pin that the 1 pin ground connection of above-mentioned latch U9,11 pin meet microprocessor U8;
Above-mentioned environment radon gas analyzer, triode T1, the T4 of described amplifying circuit are compound transistors, it also can by two-stage independently triode be formed by connecting.
Adopt the environment radon gas analyzer of this structure, its sensitivity is 20～600 times of all kinds of common instantaneous formula emanometers, provide the foundation for reducing detection limit significantly and increasing substantially accuracy of measurement, this instrument can be measured radon concentration and balance factor simultaneously fast under lower ENVIRONMENT RADON CONTENT level, FD-125 type with the better performances of using always, the FT648 type is compared, this instrument volume is little, in light weight, only need a people during work, it is also very convenient to use, therefore, detect (mainly being house) for Environmental Radon, this instrument has other kinds instrument and (comprises accumulation formula metering system, because this class metering system energy measurement balance factor not, and work efficiency is low excessively) incomparable advantage, be best suited for the instrument that Environmental Radon detects.
Description of drawings
Fig. 1 is a block diagram of the present utility model
Fig. 2 is the utility model sampling section structural representation
Fig. 3 is the amplifying circuit schematic diagram of the utility model sample processing part
Fig. 4 is pulse analyzer, code translator, microprocessor, storer, the latch of the utility model sample processing part, the circuit theory diagrams of Sheffer stroke gate;
Fig. 5 is the utility model program flow diagram
Embodiment
Sampling section is made up of film sampling sheet 1, battery lead plate 2, cable 3, support 4, high-voltage power supply.Film sampling sheet 1 is made by the plastic sheeting of thick about 4um, and alpha ray can penetrate film and energy loss is very little.Sampling sheet 1 is enclosed within on the battery lead plate 2, and battery lead plate 2 is connected with cable 3, and cable 3 is connected with high-voltage power supply, provides predetermined high voltage by power supply to battery lead plate 2.
The detector of sample processing part is provided with upper and lower two large tracts of land, and (Φ=50mm) Au Si surface barrier detector constitutes the bi-directional probing to the sampling sheet.Spacing between two detectors is 6mm, and the centre is the sample disc of the placement sampling sheet of thick 3mm, and this design makes air reach bottom line to Alpha-ray energy absorption, compares with the method that common single face sampling single face is measured, and its sensitivity can improve 4 times.
The electric pulse that the amplifying circuit of sample processing part can be sent into detector amplifies, and adopts compound transistor can reach high impedance, high-amplification-factor in the circuit, to overcome interference, guarantees that detectable signal is sensitive and undistorted.Resistance R 18 in the circuit, R10, R20 are variable resistor, and the effect of resistance R 18 is the balances of regulating upper and lower two parts output signal of pre-amplification circuit, and the effect of resistance R 20 is to regulate total magnification.Transport and placing device U1, U2 are two parts of same integrated circuit.
The pulse analyzer of sample processing part be 128 autolytes towards analyzer, it analyzes the pulse height of the amplification signal sent into, obtains sample
218The Po count value (N '
218-Po) and
214The Po count value (N '
214-Po).In its circuit structure, comparer U4 and peripheral circuit thereof are the effects of playing comparer, and input signal and reference voltage are compared, and resistance R 24 is variable resistors, and the resistance that changes it can be regulated the work threshold value of comparer U4.Monostable trigger U5, U6 are two functional blocks of same integrated circuit.The effect of sampling holder U7 is that the input signal of analog to digital converter U13 was remained unchanged in the transition period.It is the sampling holder chip of LF398 that the utility model is selected model for use, and in the work, when logic was input as high level, sampling holder worked in sampling pattern; When logic was input as low level, it worked in the maintenance pattern, and capacitor C 18 is to keep electric capacity.Analog to digital converter U13 is an A/D converter, it is a digital quantity signal with analog signal conversion, the utility model is selected the ADC0809A/D conversion chip for use, its IN-0～IN-7 port is 8 road input end of analog signal, D0～D7 port is the digital quantity output terminal, and A, B, C, ALE port are that channel address latchs and deciphers.Two input ends of Sheffer stroke gate F1 are monostable trigger U5 and microprocessor U8 respectively, output termination analog to digital converter U13, and its effect is the signal that receives U5, U8, the startup of control analog to digital converter U13.
The pulse analyzer of sample processing part meets microprocessor U8, code translator U10, U11, latch U9, storer U12 again, and microprocessor U8 is connected with latch U9, storer U12, Sheffer stroke gate F4 respectively by bus.The P16 of microprocessor U8, P17 port (7,8 pin) are the control high pressure port.Microprocessor also is connected with operation keyboard, display, the printer of peripheral hardware part by interface, testing result is shown and prints.
The model of some devices that present embodiment is selected for use is as follows: transport and placing device U1, U2, U3 is the NE5532 chip, comparer U4 is the LM393A chip, monostable trigger U5U6 is the 74HC123 chip, sampling holder U7 is the LF398 chip, analog to digital converter U13 is the ADC0809 chip, Sheffer stroke gate F1, F4 is respectively 74HC00, the 74HC30 chip, phase inverter F2, F3 is the 74HC04 chip, microprocessor U8 selects 8031 chips for use, also can adopt 8051 family chips, latch U9 is the 74LS373 chip, code translator U10, U11 is the 74HC138 chip, and storer U12 is 628128 chips.
The utility model is compared with the domestic and international instrument of measuring radon gas commonly used and is had that Measuring Time is short, accuracy is high, can measure radon concentration and two advantages such as parameter of balance factor, and concrete numerical value sees the following form.
Table 1 home market common instrument basic fundamental performance statistics table
(Data Source: the nuclear industry radioactivity is reconnoitred test satellite location)
| The instrument model | The place of production | Metering system | Sampling volume or time | Measuring Time min | Range of sensitivity counting min -1/ Bq.m -3 | Theoretical relative | Measurement parameter |
| FD-125 FT648 FD-3017 FD-3016 PY-4-A KF-602C RCM-2 1027 RAD7 | The Sino-America U.S. of China China China | The instantaneous formula accumulation of the instantaneous formula of the instantaneous formula of the instantaneous formula of the instantaneous formula of instantaneous formula formula continous way continous way | 0.5L 15min flow 40L/min 1.0L.2min 0.5L 10min 0.5L 180min | n×10 15 2 3 10 3 60 60 60 | 0.07～0.09 0.05～0.07 0.002～0.003 0.016～0.02 0.04～0.05 0.014～0.016 0.6～0.8 0.00045～ 0.0009 0.016～0.03 | 12％～11％ 14％～12％ 71％～58％ 25％～22％ 16％～14％ 27％～25％ 4.1％～ 3.5％ 150％～ 130％ 25％～24％ | Radon concentration also can be used for balance factor and measure radon concentration, the Measuring Time of balance factor under higher concentration. factor but lining is weighed needs a few hours radon concentration radon concentration radon concentration radon concentration radon concentration radon concentration ( |
| The | Instantaneous formula | 10min | 10 | 1.5～1.7 | 2.6%～2.4% | Radon concentration, balance factor | |
1. the theoretical relative standard deviation in the table calculates by the instrument of measuring 1min under the radon concentration of 100Bqm-3.Formula is:
N is counting.
2. the sensitivity of HDC type instrument is in the value of battery lead plate voltage during for-3000V.
Claims (7)
1, a kind of environment radon gas analyzer, it is characterized in that: it is made up of sampling section, sample processing part; Sampling section is made up of sample sheet [1], battery lead plate [2], cable [3], support [4], high-voltage power supply of film, film sampling sheet [1] is enclosed within on the battery lead plate [2], battery lead plate [2] is connected with cable [3], support [4] is connected with battery lead plate [2], cable [3] is in support [4] central cavity, and cable [3] is connected with high-voltage power supply; Sample processing part is made up of detector, amplifying circuit, pulse analyzer, code translator, microprocessor, storer, latch, Sheffer stroke gate, the input end of the output termination amplifying circuit of detector, the input end of the output termination pulse analyzer of amplifying circuit, pulse analyzer connects code translator and microprocessor again, and microprocessor through bus is connected with latch, storer, Sheffer stroke gate respectively;
Above-mentioned detector is made up of two Au Si surface barrier detectors, and they are placed face to face, and the centre is provided with a sample disc.
2, environment radon gas analyzer according to claim 1, it is characterized in that: described amplifying circuit is made up of pre-amplification circuit and operational amplification circuit, pre-amplification circuit is divided into upper and lower two parts, connects the output terminal of two Au Si surface barrier detectors of above-mentioned detector respectively; The top of pre-amplification circuit is by triode T1, T2, T3, resistance R 1, R2, R3, R4, R5, R6, R7, R8, capacitor C 1, C2, C3, C4 forms, the base stage of triode T1 connects signal input part, grounded emitter, the emitter of collector connecting transistor T2, the base stage of triode T2 is connected between power supply V+ and the ground, the base stage of collector connecting transistor T3, the emitter of triode T3 connects signal input part by resistance R 6, also by resistance R 7 ground connection, collector is by capacitor C 4, resistance R 8 is connected on signal output part, resistance R 1 one termination 24V power supplys, another termination signal input part, resistance R 2, R3 is connected between triode T2 base stage and power supply V+ and the ground, resistance R 4, R5 is connected on triode T2 respectively, between the collector of T3 and the power supply V+, capacitor C 1 is connected on signal input part, capacitor C 2, C3 is connected across resistance R 2 respectively, the two ends of R6; The bottom of pre-amplification circuit is by triode T4, T5, T6, resistance R 11, R12, R13, R14, R15, R16, R17, R18, and capacitor C 9, C10, C11, C12 form, and its connected mode is identical with top; Operational amplification circuit is by transport and placing device U1, U2, U3, resistance R 9, R10, R19, R20, R21, capacitor C 5, C6, C7, C8 forms, end of oppisite phase 2 pin of transport and placing device U1 connect the signal output part of pre-amplification circuit, in-phase end 3 pin are by parallel resistor R9, capacitor C 5 ground connection, 4 pin meet power supply V-, 8 pin meet power supply V+, output terminal 1 pin connects end of oppisite phase 6 pin of the transport and placing device U2 of subordinate by capacitor C 6, in-phase end 5 pin of U2 are by resistance R 19 ground connection, output terminal 7 pin connect end of oppisite phase 2 pin of the transport and placing device U3 of subordinate, in-phase end 3 pin of U3 are by resistance R 21 ground connection, 4 pin meet power supply V-, 8 pin meet power supply V+, 1 pin is an output signal end, resistance R 10 is slip variable resistors, its stiff end connects transport and placing device U1 output terminal and ground respectively, the input end of slip termination transport and placing device U2, be connected across between 6 pin and 7 pin of transport and placing device U2 after resistance R 20 and capacitor C 7 are in parallel, capacitor C 8 is connected on the output signal end of transport and placing device U3;
3, environment radon gas analyzer according to claim 2, it is characterized in that: described pulse analyzer is made up of comparer U4, monostable trigger U5, U6, sampling holder U7, analog to digital converter U13, Sheffer stroke gate F1, phase inverter F2, F3, resistance R 22～R30, capacitor C 13～C18; End of oppisite phase 2 pin of comparer U4 meet power supply VCC by signal output part, in-phase end 3 pin that capacitor C 13 connects above-mentioned amplifying circuit by 1 pin, 4 pin ground connection, 8 pin that resistance R 24 meets 2.5V reference voltage, the steady trigger U5 of output terminal 1 pin order, 1 pin of comparer U4 is also by resistance R 25 ground connection, resistance R 22, R23 are in series, its contact connects 2 pin of comparer U4, two ends connect power supply VCC and ground respectively, and capacitor C 14 is connected between 3 pin and output terminal of comparer U4; 2 pin of monostable trigger U5 are 1 pin, 9 pin that input end 5 pin, 13 pin that 12 pin, 4 pin that 3 pin meet U6 meet Sheffer stroke gate F1 meet U6 of 10 pin of the steady trigger U6 of order and microprocessor U8 respectively, 15 pin meet power supply VCC by resistance R 28,7 pin that capacitor C 16 is connected on monostable trigger U6 between 14 pin and 15 pin meet power supply VCC by resistance R 29,11 pin also meet power supply VCC, capacitor C 17 is connected between 6 pin and 7 pin, and 12 pin of monostable trigger U6 connect 8 pin of sampling holder; 3 pin of sampling holder also meet 2 pin and power supply V+, connect 6 pin by capacitor C 18 by resistance R 27, R30 by signal output part, 7 pin ground connection, 7 pin that capacitor C 15 connects above-mentioned amplifying circuit, and 5 pin connect 5 pin of analog to digital converter U13; 32～39 pin, 3,4,7,8,13,14,17,18 pin of latch U9 and 13～15,17～21 pin of storer U11 of 8,14,15,17～21 pin of analog to digital converter U13 by bus interface microprocessor U8, its 10 pin connect clock signal input, 12 pin and connect that 5V reference voltage, 16 pin ground connection, 22 pin connect code translator, 6 pin connect 6 pin of Sheffer stroke gate F1,6 pin that 9 pin meet phase inverter F2,9 pin that 7 pin meet phase inverter F3; Another input end 4 pin of Sheffer stroke gate F1 connect 2 pin of microprocessor U8, and 5 pin of phase inverter F2 connect code translator, and 8 pin of phase inverter F3 connect 13 pin of microprocessor U8;
4, environment radon gas analyzer according to claim 3, it is characterized in that: described code translator comprises U10, U11 two block decoding chips, 13 pin of U10 connect 5 pin of phase inverter F2,8 pin that 5 pin meet Sheffer stroke gate F4,6 pin that 6 pin meet U11,22 pin of the 13 pin analog to digital converter U13 of U11;
5, environment radon gas analyzer according to claim 4 is characterized in that: 21～28 pin of described microprocessor U8 connect 2,5,6,9,12,15,16,19 pin of latch U9,2～12,23,25～28 pin of storer U12,1～6,11,12 pin of Sheffer stroke gate F4 respectively by bus; Resistance R 31, R32, R33, R34 form serial loop, and the tie point of R32, R33 meets power supply VCC, and the tie point of R31, R34 connects 8 pin that control high pressure, R33, R34 tie point meet microprocessor U8, and the tie point of R32, R31 connects 7 pin of microprocessor U8; 30 pin that the 1 pin ground connection of above-mentioned latch U9,11 pin meet microprocessor U8.
6, environment radon gas analyzer according to claim 5, it is characterized in that: triode T1, the T4 of described amplifying circuit are compound transistors, they also can by two-stage independently triode be formed by connecting.
7, environment radon gas analyzer according to claim 6 is characterized in that: described film sampling sheet [1] is made by plastic sheeting, and thickness is 4-54um.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03217472 CN2618162Y (en) | 2003-05-27 | 2003-05-27 | Random environment measuring instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03217472 CN2618162Y (en) | 2003-05-27 | 2003-05-27 | Random environment measuring instrument |
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| CN2618162Y true CN2618162Y (en) | 2004-05-26 |
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| CN 03217472 Expired - Lifetime CN2618162Y (en) | 2003-05-27 | 2003-05-27 | Random environment measuring instrument |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104783487A (en) * | 2015-04-29 | 2015-07-22 | 成都禾睿电子产品有限公司 | Toothbrush device for monitoring oral hygiene |
| CN109814144A (en) * | 2019-01-01 | 2019-05-28 | 中国人民解放军63653部队 | A kind of radon and radon daughter synchro measure and dosage rate evaluation method |
| CN111638541A (en) * | 2020-05-27 | 2020-09-08 | 河北航遥科技有限公司 | Radon concentration measuring method and device |
-
2003
- 2003-05-27 CN CN 03217472 patent/CN2618162Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104783487A (en) * | 2015-04-29 | 2015-07-22 | 成都禾睿电子产品有限公司 | Toothbrush device for monitoring oral hygiene |
| CN109814144A (en) * | 2019-01-01 | 2019-05-28 | 中国人民解放军63653部队 | A kind of radon and radon daughter synchro measure and dosage rate evaluation method |
| CN111638541A (en) * | 2020-05-27 | 2020-09-08 | 河北航遥科技有限公司 | Radon concentration measuring method and device |
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