CN207007285U - Radiation environmental monitoring super-flow air sampler in-situ calibration device - Google Patents
Radiation environmental monitoring super-flow air sampler in-situ calibration device Download PDFInfo
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- CN207007285U CN207007285U CN201720765323.9U CN201720765323U CN207007285U CN 207007285 U CN207007285 U CN 207007285U CN 201720765323 U CN201720765323 U CN 201720765323U CN 207007285 U CN207007285 U CN 207007285U
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Abstract
The utility model discloses a kind of radiation environmental monitoring super-flow air sampler in-situ calibration device, including：Test side containing Roots's flow sensor, temperature sensor, pressure sensor and signal gathering unit；Communication unit between test side and display operating side；Containing signal processing control unit and display screen, touch-screen, memory display operating side；Described Roots's flow sensor, temperature sensor, pressure sensor detect volumetric flow of gas, gas temperature and gas pressure in the gas delivery port of sampler respectively, and these three signals are inputted to signal gathering unit；Described signal gathering unit will be delivered to signal processing control unit after three kinds of signals amplification of reception through communication unit；Described signal processing control unit is shown on display screen after processing is compensated to the amplified signal of reception.The device can realize that real-time calibration is demarcated with mobile, and stated accuracy meets big flow and high-precision gas dosing function up to 2%.
Description
Technical field
The utility model belongs to radiation environmental monitoring field, and in particular to a kind of radiation environmental monitoring super-flow air is adopted
Sample device in-situ calibration device.
Background technology
Measuring accuracy directly affects the accuracy of detection of nuclide concentration.Air sampler flow field calibration equipment not only can be with
Air sampling precision during air sampler operation is examined, but also its deviation can be recorded, by software compensation, improves air
The air measuring accuracy of sampler.
For the flow calibration of air sampler, existing demarcation means include in the world：ISO10780-1994 " with than
Trustship measures flue-gas flow rate ", it is necessary to flue is inserted with the pibtot's tub for specifying specification, carry out multiple spot retest and (be more than 16
Point), then averaged.The shortcomings that this method is that calibration process is complicated, the time is slow, and is had necessarily to the starting velocity of gas
Requirement, precision it is relatively low.JJF1404-2013 " air sampler type evaluation outline ", JJG956-2013 " air sampler "
In to define with range be 0-6L/min, the soap film flowmeter that accuracy class is ± 1% is carried out to the flow of air sampler
Demarcation.The measured value of temperature and pressure is obtained with thermometer, pressure gauge, realizes temperature and pressure compensation；Cumulant is completed with timer
Statistics；And contrasted with the indicated value of air sampler, complete demarcation.Because the measures range of soap-film flow is smaller, it is not inconsistent
Big flow (maximum 900m3/hr) requirement of current radiation environment air sampler is closed, and soap-film flow needs artificial reading liquid
Position, it is difficult to realize the data sampling function of automation；Need the multiple instruments of manual operation to complete in calibration process, artificial reading be present
The shortcomings of error, process are complicated, the time is slow is counted, this method can be used for the production demarcation of air sampler production unit, but not
It is suitable for demarcation when air sampler is run at the scene.
Utility model content
To solve the deficiencies in the prior art, the utility model proposes a kind of radiation environmental monitoring super-flow sampler to show
Field caliberating device.The caliberating device has operating mode flow and marks the calibration mode of condition flow, can realize real-time calibration and movement
Demarcation, stated accuracy meet big flow and high-precision gas dosing function up to 1%.
The technical solution of the utility model is：
A kind of radiation environmental monitoring super-flow sampler in-situ calibration device, including：Contain Roots's flow sensor, temperature
Spend the test side of sensor, pressure sensor and signal gathering unit；Communication unit between test side and display operating side；
Display operating side containing signal processing control unit, display screen, touch-screen and memory；Roots's flow sensor,
Temperature sensor, pressure sensor detect gas operating mode instantaneous delivery, temperature and pressure in the gas delivery port of sampler respectively
Power, and these three signals are inputted to signal gathering unit；The signal gathering unit will pass through after three kinds of signals amplification of reception
Communication unit is delivered to signal processing control unit；The signal processing control unit combines temperature to the operating mode instantaneous delivery of reception
Degree is shown on display screen after compensating processing with pressure.
Roots's flow sensor that the utility model uses is a kind of volumetric flow device.Its indoor design has composition certain
The measuring room space of volume, have in measuring room a pair or two pairs can be with the waist wheel of tangent rotation, with two outside flowmeter shell
Individual waist wheel has been co-axially mounted a pair of drive gears, and the intermeshing of drive gear allows two waist wheels mutually to link.Utilize machine
Tool measuring cell is continuously divided into fluid single known volume fractiion, gradually, is repeatedly full of according to measuring room
Flow volume total amount is measured with the number for discharging the volume fractiion fluid.
Roots's flow sensor measurement accuracy is high, elementary error be generally ± 0.5%, special reachable ± 0.2% or
It is higher.Roots's flow sensor is direct-reading meter, and measuring speed is fast, and without extra power, merely with the energy of fluid in itself
Measure can operation.In addition, Roots's flow sensor can directly obtain accumulative total amount, have clear, teletransmission control etc. excellent
Point.
Temperature sensor, pressure sensor are using sensor common on the market.Relative to traditional thermometer, pressure
Power meter, temperature sensor, pressure sensor have higher sensitivity, measurement accuracy and stability, can realize to sampling
Monitor and measure the real-time stabilization of gas in device appendix.
Preferably, the utility model uses PT1000 temperature sensors, the sensor changes the temperature change of gas
Into resistance variations, PT1000 resistance is converted into voltage signal by detection electric bridge, and the sampled value of temperature is converted to by A/D
Tad。
Preferably, the utility model uses diffusion silicon pressure sensor, the sensor changes the pressure change of gas
Into voltage change, the sampled value Pad of pressure is converted to after amplifier circuit, by A/D.
During in view of practical application, sensor can be placed near air sampler, and display operating side is in air sampler
Control room in use, both have a certain distance (about more than ten meters).Due to temperature, pressure, the output signal of flow sensor
For small-signal, it is unsuitable for the transmission of relatively long distance, if more than ten meters of long wires of sampling directly transmit, larger sky can be introduced
Between electromagnetic interference and conductor impedance the influence of factor such as fluctuate with variation of ambient temperature, it is difficult to ensure measuring accuracy.Therefore,
The utility model test side adds the signal gathering unit by flow sensor with small signals amplification function, nearby
The metering amplification to temperature, pressure and traffic pulse is realized, and the signal after amplification is transmitted to aobvious through communication unit
Show terminal, ensure that data communication will not lose measuring accuracy.
Preferably, described signal gathering unit is using 16 embedded microprocessor MSP430AFE253 as core, because
The high-precision metering units such as 24 ε-δ types A/D, programmable amplifier PGA are internally integrated for the processor, temperature, pressure can be realized
The high-precision measuring of power.
Preferably, described signal processing control unit is using 32 embedded microprocessor STM32F103RD as core,
By communication unit connect signal deteching circuit, obtain flow, temperature, pressure signal, and this flow signal is entered trip temperature with
Pressure compensation is calculated, and then, result of calculation is shown on display screen.According to the equation of gas state physically, to operating mode
Flow enters trip temperature and pressure compensation, is so as to obtain marking the detailed process of condition flow and mark condition cumulant：
Operating mode instantaneous delivery Qm (i) (m3/ hr) be：
Wherein, Qm (i) is the operating mode instantaneous delivery in the ith sample cycle；T is sampling interval duration, unit：Second；N is
The pulse number that flow sensor is sent in T times second, is recorded with timer；K is the intrinsic flow system of Roots's flow sensor
Number, by sensor, producer provides.
Temperature Temp (DEG C) is：
Temp=Kt×Tad-Bt
Wherein, KtIt is the amplification coefficient of temperature computation, BtIt is the biasing coefficient of temperature computation, the two coefficients pass through reality
Temperature calibration link obtain；Tad is the sampled value of temperature sensor.
Pressure Press (kPa) is：
Press=Kp×Pad-Bp
Wherein, KpIt is the amplification coefficient of calculation of pressure, BpIt is the biasing coefficient of calculation of pressure, the two are by reality
Pressure calibration link obtains；Pad is the sampled value of temperature sensor.
Operating mode integrated flux psum(i)(m3) be：
Psum(i)=Psum(i-1)+Qm(i)×3600
Wherein, Psum(i) it is the operating mode integrated flux in ith sample cycle, Psum(i-1) it is the i-th -1 sampling period
Operating mode integrated flux, Qm (i) are the instantaneous deliveries in i sampling period.
The compensating factor Cv of temperature and pressure is：
Mark condition instantaneous delivery Qo (i) (Nm3/ hr) be：
Qo (i)=Cv × Qm (i)
Mark condition integrated flux Sum (i) (Nm3) be：
Sum (i)=Sum (i-1)+Qo (i) × 3600
Wherein, Sum (i) is the mark condition integrated flux in ith sample cycle；Sum (i-1) is the i-th -1 sampling period
Mark condition integrated flux；Qo (i) is the mark condition instantaneous delivery in the ith sample cycle.
Described signal processing control unit has the user key-press order received on touch-screen, controls opening for caliberating device
Stop, the function such as parameter setting and result queries.By measurement data caused by input sample device itself on the touchscreen, with letter
Number processing and control element (PCE), which handles to obtain signal, to be compared, and the accuracy of detection of sampler flow parameter is determined, so as to complete air
The staking-out work of flow.
Preferably, described display screen is TFT color LCD screens.
Preferably, described touch-screen is DGUS touch-screens, user can be by operation touch-screen come start-stop flux scale
Determine program, check real time data, relevant parameter is set.
Preferably, described display end is additionally provided with SD interface, user can be by embedded microprocessor STM32F103RD
Data storage after processing is in SD card, convenient use.
Preferably, described test side be also configured with can be for signal gathering unit internal electric source, the internal electric source
The chargeable lithium cell of 12V, 4000mAHr capacity, have the advantages that easy to use, safe.Preliminary test shows the battery
After fully charged, caliberating device can continuously run about 8 hours, meet the requirement of actual use.Preferably, the utility model is also
There is provided and the supporting 12v chargers of internal cell.
Preferably, described communication unit is RS485 communication bus, the effective propagation path of the bus is 1000 meters,
The long-distance transmissions in the case where ensureing the signal degree of accuracy can be realized.Further, described RS485 communication bus uses
4 core shielding lines, wherein 2 are used for data and communicate, another 2 are used for power line.
Preferably, the utility model test side is arranged in the removable stage storage compartment of two relative doors.The casing
With the advantage such as high intensity, shock resistance be excellent, use is moved easily.
Preferably, caliberating device of the present utility model is to be arranged in the removable stage storage compartment of two relative doors
The RS485 communication bus and display operating side of test side, connecting detection end with display operating side.In described stage storage compartment
It is provided with Roots's flow sensor, PT1000 temperature sensors, diffusion silicon pressure sensor, lithium battery and signal acquisition list
Member, described signal gathering unit is using 16 embedded microprocessor MSP430AFE253 as core；Described display operating side
It is made up of signal processing control unit, TFT color LCD screens, DGUS touch-screens and memory, SD card, described signal transacting
Control unit is using 32 embedded microprocessor STM32F103RD as core.
The utility model have the advantage that for：
(1) there is big flow, high-precision gas dosing function.The utility model is 0~1200m3/ from measurement range
Hr, precision be 0.5% Roots's flow sensor, using meet gas maximum stream flow 900m3/hr, stated accuracy as 1% metering
It is required that.
(2) by the way of signal processing circuit is combined with embedded application software, realize operating mode flow signal, temperature and
Quick, the real-time detection of pressure, and then determine calibration result.Signal gathering unit works simultaneously with signal processing control unit,
Operation efficiency can largely be improved.
(3) there is operating mode flow and marks the calibration mode of condition flow.Caliberating device can select according to panel operation setting
Select the Demarcate Gas of one form of which.When marking condition flow calibration, it is necessary to pass through temperature, the supplement calculation of pressure and air pressure
The calculating of the contracting factor, operating mode flow is converted into the mark condition flow under unified condition (20 degree, 1 atmospheric pressure).
(4) there is mobile calibrating function, the device is vehicle-mounted to demarcation scene, change original air sampler gas stream
Quantity sensor needs to dismantle, be transported to the mode that metrological service is demarcated.Using low consumption circuit design and chargeable lithium battery
Power supply mode, facilitate the application of caliberating device in the wild.
(5) RS485 data communication modes are used between test side and handheld terminal, reliable communication distance can meet to detect
The gas delivery port close to air sampler is held, operator takes what display operating side was operated in air sampler control room
Working method.
Brief description of the drawings
Fig. 1 is the structural representation of the utility model radiation environmental monitoring super-flow sampler in-situ calibration device；
Fig. 2 is sampler device calibration data figure in embodiment 1；
Fig. 3 is sampler device calibration data figure in embodiment 2.
Embodiment
In order to more specifically describe the utility model, below in conjunction with the accompanying drawings and embodiment is to of the present utility model
Technical scheme is described in detail.
Referring to Fig. 1, the utility model radiation environmental monitoring super-flow sampler in-situ calibration device, including：It is arranged at
The RS485 communication bus of test side, connecting detection end and display operating side in the removable stage storage compartment of two relative doors
And display operating side.Wherein, Roots's flow sensor, temperature sensor, pressure sensor, lithium are provided with stage storage compartment
Battery and signal gathering unit, the signal gathering unit is using 16 embedded microprocessor MSP430AFE253 as core, also
Including embedded microprocessor MSP430AFE253 peripheral circuits；Show operating side by signal processing control unit, TFT colour liquid
Crystalline substance screen, DGUS touch-screens and memory composition, the signal processing control unit is with 32 embedded microprocessors
STM32F103RD is core, and the same signal processing control unit also includes embedded microprocessor STM32F103RD periphery
Circuit.
The use process of the radiation environmental monitoring super-flow sampler in-situ calibration device is：
First, flanged (FLGD) butt tube is connected to the gas outlet of sampler, and Roots's flow sensor is connected to pair
In adapter, the gas flow data of measurement sampler gas outlet, meanwhile, utilize temperature sensor, pressure sensor measurement sampling
The gas temperature of device gas outlet, pressure.Then, the small-signal that three sensors measure is sent to embedded microprocessor
MSP430AFE253 carries out signal amplification, next, the signal after amplification is delivered into the embedded place that declines through RS485 communication bus
Device STM32F103RD is managed, is shown in after microprocessor compensation processing on TFT color LCD screens.
In addition, user is controlled the start and stop of whole caliberating device by the DGUS touch-screens of display end, detects data type
Selection, the setting of other specification and result inquiry etc..Wherein, data type includes floor data (operating mode flow and work
Condition cumulant), mark condition data (mark condition flow and mark condition cumulant).
The device is also configured with SD interface, and user can be by the data after embedded microprocessor STM32F103RD processing
It is stored in SD card, convenient use.
In embedded microprocessor STM32F103RD, the detailed process handled signal is：
Calculate operating mode instantaneous delivery Qm (i) (m3/hr)：
Wherein, Qm (i) is the operating mode instantaneous delivery in the ith sample cycle；T is sampling interval duration, unit：Second；N is
The pulse number that flow sensor is sent in T times second, is recorded with timer；K is the intrinsic flow system of Roots's flow sensor
Number, by sensor, producer provides.
Calculate temperature Temp (DEG C)：
Temp=Kt×Tad-Bt
Wherein, KtIt is the amplification coefficient of temperature computation, BtIt is the biasing coefficient of temperature computation, the two coefficients pass through reality
Temperature calibration link obtain；Tad is the sampled value of temperature sensor.
Calculate pressure Press (kPa)：
Press=Kp×Pad-Bp
Wherein, KpIt is the amplification coefficient of calculation of pressure, BpIt is the biasing coefficient of calculation of pressure, the two are by reality
Pressure calibration link obtains；Pad is the sampled value of temperature sensor.
Calculate operating mode integrated flux psum(i)(m3)：
Psum(i)=Psum(i-1)+Qm(i)×3600
Wherein, Psum(i) it is the operating mode integrated flux in ith sample cycle, Psum(i-1) it is the i-th -1 sampling period
Operating mode integrated flux, Qm (i) are the instantaneous deliveries in i sampling period.
The compensating factor Cv for calculating temperature and pressure is：
Calculate mark condition instantaneous delivery Qo (i) (Nm3/hr)：
Qo (i)=Cv × Qm (i)
Calculate mark condition integrated flux Sum (i) (Nm3)：
Sum (i)=Sum (i-1)+Qo (i) × 3600
Wherein, Sum (i) is the mark condition integrated flux in ith sample cycle；Sum (i-1) is the i-th -1 sampling period
Mark condition integrated flux；Qo (i) is the mark condition instantaneous delivery in the ith sample cycle.
Embodiment 1
Take above-mentioned caliberating device to Hangzhou Ding Qiao radiation environments automatic monitor station and carry out on-the-spot test, be 26.8 in temperature
DEG C, humidity 85%, under conditions of air pressure is 100.01~100.31kPa, determine the instantaneous operating mode flow calibration data such as institute of table 1
Show：
Table 1
The measurement show value of sampler in table 1, the device of caliberating device show the equipment that Value Data obtains
Correction datagram carries out more deutero-albumoses using the caliberating device as shown in Fig. 2 analyzing the figure and can be clearly not available to the sampler
After fixed, the measurement error of the sampler can reach 0.89%.
Embodiment 2
Take above-mentioned caliberating device to Shanghai City radiation environment automatic monitor station and carry out on-the-spot test, determine instantaneous operating mode stream
It is as shown in table 2 to measure nominal data：
Table 2
The measurement show value of sampler in table 2, the device of caliberating device show the equipment that Value Data obtains
Correction datagram carries out more deutero-albumoses using the caliberating device as shown in figure 3, analyzing the figure and can be clearly not available to the sampler
After fixed, the measurement error of the sampler meets ± 2% required precision between 0.45%~1.65%.
The technical solution of the utility model and beneficial effect are described in detail above-described embodiment,
It should be understood that the foregoing is only most preferred embodiment of the present utility model, the utility model is not limited to, it is all at this
Any modification, supplement and equivalent substitution made in the spirit of utility model etc., should be included in guarantor of the present utility model
Within the scope of shield.
Claims (8)
- A kind of 1. radiation environmental monitoring super-flow sampler in-situ calibration device, it is characterised in that including：Contain Roots's flow Sensor, temperature sensor, the test side of pressure sensor and signal gathering unit；Between test side and display operating side Communication unit；Display operating side containing signal processing control unit, display screen, touch-screen and memory；Roots's stream Quantity sensor, temperature sensor, pressure sensor detect gas operating mode instantaneous delivery, temperature in the gas delivery port of sampler respectively Degree and pressure, and these three signals are inputted to signal gathering unit；The signal gathering unit is by three kinds of signals of reception After amplification signal processing control unit is delivered to through communication unit；The signal processing control unit instantaneously flows to the operating mode of reception Amount combination temperature is shown on display screen after compensating processing with pressure.
- 2. radiation environmental monitoring super-flow sampler in-situ calibration device as claimed in claim 1, it is characterised in that described Signal gathering unit using 16 embedded microprocessor MSP430AFE253 as core.
- 3. radiation environmental monitoring super-flow sampler in-situ calibration device as claimed in claim 1, it is characterised in that described Signal processing control unit using 32 embedded microprocessor STM32F103RD as core.
- 4. radiation environmental monitoring super-flow sampler in-situ calibration device as claimed in claim 1, it is characterised in that described Test side be configured with internal electric source.
- 5. radiation environmental monitoring super-flow sampler in-situ calibration device as claimed in claim 1, it is characterised in that described Communication unit be RS485 communication bus.
- 6. radiation environmental monitoring super-flow sampler in-situ calibration device as claimed in claim 1, it is characterised in that described Test side be arranged in the removable stage storage compartment of two relative doors.
- 7. radiation environmental monitoring super-flow sampler in-situ calibration device as claimed in claim 1, it is characterised in that described Display screen be TFT color LCD screens, described touch-screen is DGUS touch-screens.
- 8. radiation environmental monitoring super-flow sampler in-situ calibration device as claimed in claim 1, it is characterised in that described Display end be additionally provided with SD interface.
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| CN201720765323.9U CN207007285U (en) | 2017-06-28 | 2017-06-28 | Radiation environmental monitoring super-flow air sampler in-situ calibration device |
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| CN201720765323.9U CN207007285U (en) | 2017-06-28 | 2017-06-28 | Radiation environmental monitoring super-flow air sampler in-situ calibration device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107091673A (en) * | 2017-06-28 | 2017-08-25 | 浙江省辐射环境监测站 | Radiation environmental monitoring super-flow air sampler in-situ calibration device and method |
-
2017
- 2017-06-28 CN CN201720765323.9U patent/CN207007285U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107091673A (en) * | 2017-06-28 | 2017-08-25 | 浙江省辐射环境监测站 | Radiation environmental monitoring super-flow air sampler in-situ calibration device and method |
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