CN101419288B - Digital intelligent nuclear detecting and counting device based on bluetooth wireless networks - Google Patents
Digital intelligent nuclear detecting and counting device based on bluetooth wireless networks Download PDFInfo
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- CN101419288B CN101419288B CN2008102271445A CN200810227144A CN101419288B CN 101419288 B CN101419288 B CN 101419288B CN 2008102271445 A CN2008102271445 A CN 2008102271445A CN 200810227144 A CN200810227144 A CN 200810227144A CN 101419288 B CN101419288 B CN 101419288B
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Abstract
The invention discloses a digitalized intelligent nuclear detection counting device based on Bluetooth wireless communication network, which mainly comprises a central processor unit, a signal input processing unit, a liquid crystal display and keyboard interface unit, a USB interface unit, a Bluetooth communication unit, a calendar time unit, an acousto-optic warning unit and a power distribution supplying and managing unit. The central processor unit is realized by adopting a singlechip and is used as a control core of the whole device. The singlechip is connected with other units through input and output ports of the singlechip, and manages and controls information of other units. The nuclear detection counting device has high timing and counting precision as well as high reliability, realizes friendly user interactive function, realizes multi-point synchronous wireless network deploying measurement, has compact structure and lightness, is convenient to carry, and is suitable for moving measurement.
Description
Technical field
The present invention relates to a kind of nuclear detection counting assembly, specifically, be meant a kind of digital intelligent nuclear detection counting assembly based on blue tooth radio network.
Background technology
The nuclear detection counting assembly is the fundamental measurement device during nuclear is measured, and is mainly used to determine and the relevant pulse count frequency of some fundamental physical quantity (as source strength, conversion probability, reaction cross-section etc.).It cooperates probes such as α, β, γ, can carry out measurements such as radioactivity, dosage.The nuclear detection counting assembly generally comprises high-voltage power module, low-tension supply module, linear amplifier module, single-channel pulse amplitude analysis module and calibration module.High, the low-tension supply module is supplied with nuclear radiation detector and the required power supply of other module, the linear amplifier module is amplified the output signal of nuclear radiation detector, the pulse amplitude analysis module realizes pulse amplitude analysis to the signal after amplifying, and output pulse amplitude is last, the reshaping signal of the input signal between the following discrimination threshold voltage, the calibration module is counted it, on, the difference of following discrimination threshold voltage is wide voltage, by with the wide voltage in road serve as change at interval continuously on, following discrimination threshold voltage is measured, can record the pulse height distribution profile of input signal, finish single-channel pulse amplitude analytic function.If the signal after will amplifying is directly imported the calibration module, can record the pulse tale, realize the calibration tally function.Traditional nuclear detection counting assembly generally adopts discrete component or small scale integration to build, upper and lower discrimination threshold voltage needs to change its size by the manual shift potentiometer during measurement, influence wide consistance and the bearing accuracy of Ge Dao, troublesome poeration, nuclear detection counting assembly counting the time can not be realized no worker monitor, repeatedly duplicate measurements and preserve data, use inconvenience, and volume is big, cost is high.
On the other hand,,, more be necessary original system is improved, make the on-the-spot test personnel can be as far as possible away from test environment particularly for the stronger occasion of radiation because nuclear radiation environment generally can bring certain influence to health.Meanwhile, because the measurable area of probe of nuclear detection counting assembly is limited,, at this moment just require the nuclear detection counting assembly can realize multiple spot synchro measure simultaneously if think simultaneously the nuclear radiation in the certain limit to be measured and monitored.Yet, also do not have relevant document or product that this problem is proposed solution at present.
Summary of the invention
The present invention is in order to solve traditional core surveymeter counting apparatus counting and timing accuracy is low, system's interoperability manipulation is poor, can't realize away from the real-time measurement of test environment and the defective of multiple spot while synchro measure, a kind of digital intelligent nuclear detection counting assembly based on blue tooth radio network is provided, adopt advanced high-performance single-chip microcomputer as CPU (central processing unit), the combined with hardware gating circuit has been realized high-precision timer counter function; Adopt high integrated with Bluetooth communication unit to realize Bluetooth wireless communication, solved the remote live measurement of nuclear detection counting assembly and the problem of multiple spot while synchro measure; Adopt hummer and LED light to constitute acousto-optic warning unit, realize the automatic sound-light alarm function; Possess liquid crystal, keyboard and USB interface and realized friendly human-computer interaction interface; Utilize programmable gain amplifier to realize that the adaptive gain of input signal amplifies.
For realizing above-mentioned purpose, the technical solution used in the present invention is as follows:
A kind of digital intelligent nuclear detection counting assembly based on blue tooth radio network mainly comprises: central processor unit, signal input processing unit, liquid crystal display and unit keyboard interface, usb interface unit, bluetooth-communication unit, calendar time unit, acousto-optic warning unit and confession distribution management unit.
Central processor unit adopts chip microcontroller, and as the control core of whole device, single-chip microcomputer is connected by each unit of its input/output port and other, and the information of other each unit is managed and controls.
The signal input processing unit is made up of programmable gain amplifier, discriminator circuit, pulse former, anticoincidence circuit, threshold adjustment circuit and gating circuit, described programmable gain amplifier carries out self-adaptation to the input signal from probe and amplifies, amplified analog signal will be gathered port and be sampled by the A/D of single-chip microcomputer, single-chip microcomputer is regulated the enlargement factor of programmable amplifier according to the sampled value self-adaptation, also can be by enlargement factor manually is set, final programmable gain amplifier is amplified to suitable amplitude with input signal.Discriminator circuit adopts technical grade comparer chip to constitute, signal after the amplification can obtain the high-low level signal of Transistor-Transistor Logic level through discriminator circuit, the Transistor-Transistor Logic level signal shaping that discriminator circuit is obtained by pulse former is the pulse signal that single-chip microcomputer can be counted, anticoincidence circuit meets the signal that upper and lower discriminator circuit obtains, if signal amplitude is between the upper and lower discrimination threshold voltage, the counter port that pulse signal after then will being shaped is delivered to single-chip microcomputer by gating circuit is counted, and finishes and appraises and decides the mark tally function; In addition, passing threshold is adjusted the threshold value comparative voltage that circuit can accurately be regulated discriminator circuit by single-chip microcomputer, the difference of upper and lower discrimination threshold voltage is wide voltage, by serving as to change at interval continuously upper and lower discrimination threshold voltage to measure with the wide voltage in road, can record the pulse height distribution profile of input signal, finish the pulse amplitude analysis function.
Liquid crystal display and unit keyboard interface realize the information interaction between nuclear detection counting assembly and the user.Liquid crystal display is connected to the address/data bus of single-chip microcomputer, keyboard is connected to the I/O port of single-chip microcomputer, control by Single Chip Microcomputer (SCM) program, show measuring condition and measurement result with the custom menu form, the user can select menus at different levels by the keyboard input, and the start and stop of measuring condition and control survey process are set.
Usb interface unit is connected to the address/data bus of single-chip microcomputer, enables the USB chip by chip selection signal.Usb interface unit can work in master and slave two kinds of patterns, as the main frame of USB flash disk memory device, the form of measurement result with file system can be stored in the USB flash disk movable storage device when being operated in holotype; As the slave unit of PC, can realize and the real-time data communication of PC when being operated in, comprise the monitoring of measurement result and the setting of measuring condition from pattern.
Bluetooth-communication unit realizes the remote-wireless monitoring of measurement result and measuring condition, simultaneously can realize carrying out networking with other nuclear detection counting assembly and the result being sent on the monitor terminal, solve remote live measurement and the multiple spot problem of synchro measure simultaneously.For improving system reliability, the present invention adopts high integrated bluetooth communication to realize the blue teeth wireless data transmission, and module is connected with single-chip microcomputer by the serial line interface of standard.
The calendar time unit provides the calendar time function for total system, for measurement result provides the time and date sign, and has chargeable button cell, guarantees that clock can continuous service.
Acousto-optic warning unit adopts hummer and LED light to constitute, I/O mouth by single-chip microcomputer is controlled, realize automatic sound-light alarm, alert frequency is provided with, the amplitude size that surpasses alert frequency along with count frequency is sent the alarm sound of different frequency and the indication of reporting to the police, visual perception counting pulse frequency automatically.
For the distribution management unit is each unit power supply of system, system power supply is divided into low-tension supply and high-voltage power supply, low-tension supply comprises the 3.3V power supply of supplying with single-chip microcomputer and peripheral chip thereof, supply with the 5V power supply of LCD MODULE, supply signal input processing unit ± 12V power supply and the 12V low-voltage supply of supplying with probe.The photomultiplier that high-voltage power supply is mainly probe provides working power, pop one's head at difference, the high pressure range difference, since the output signal of photomultiplier be subjected to easily the influence of alive fluctuation, so the voltage of high-pressure modular must have good stability, less ripple, drift and temperature coefficient, for guaranteeing the stable of high pressure and realizing that 0-1500V is adjustable, the present invention adopts the high-voltage power module and the photomultiplier of the output of import positive voltage to be used, and its outstanding characteristics are: high stability, the no overshoot of high pressure output, ripple and coefficient of deviation are little, resistance/voltage adjustment, compact conformation.This high-pressure modular comprises 12V power input, 0-1500V high-voltage output end, 0-5V high voltage adjusting end and ground wire.High voltage adjusting end by Single-chip Controlling 0-5V is realized the high pressure output of 0-1500V, output response time 200ms, and ripple 30mVp-p, the requirement of the photomultiplier of probe to high pressure can be satisfied in temperature coefficient ± 0.03/ ℃.In order to reach portable design and removable Testing requirement, the present invention adopts 4 joint lithium battery series connection to be system's power supply, and the power supply of whole device is carried out strict control by single-chip microcomputer, and when being in non-measurement pattern, will turn-off the power supply of dead zone unit, save electric energy loss.
It is simple that the present invention has a circuit, compact conformation, carry and traverse measurement convenient, can obtain measurement result at a distance in real time and measuring condition is set, stable performance, degree of intelligence and measuring accuracy height, advantage such as man-machine interaction is good.Compared with prior art, the present invention also has following advantage:
1, made full use of the high-intelligentization of single-chip microcomputer control technology realization system,, can handle automatically the output signal of difference probe based on the enlargement factor that the measurement self-adaptation of programmable gain amplifier and signal amplitude is regulated input signal; Realize automatic sound-light alarm, alert frequency be provided with that the amplitude size that surpasses alert frequency along with count frequency is sent the alarm sound of different frequency and the indication of reporting to the police, visual perception counting pulse frequency automatically; Threshold value and high pressure output are realized accurately regulating automatically by Single-chip Controlling, and the USB interface chip is realized setting automatically of master slave mode and switched;
2, adopt the AVR microprocessor of high-performance, low-power consumption as CPU (central processing unit), can realize simultaneously α and β ray are carried out step-by-step counting and amplitude analysis, between the counter of the output terminal of input signal processing unit and single-chip microcomputer, add Sheffer stroke gate, by the start and stop of single-chip microcomputer synchro control counting and the switch of Sheffer stroke gate, timer adopts interrupt mode, has improved regularly and counting precision;
3, adopt the high integrated with Bluetooth wireless communication module of import, improved system reliability, possess the intelligent terminal of bluetooth equipment (as smart mobile phone or PDA) just on can realize that telemeasurement and parameter are provided with function, need not design hardware circuit in addition again, saved hardware cost, easy to use;
4, possess liquid crystal display and keyboard interface, adopt the hierarchical menu form to carry out interface display, handle the keyboard input based on interrupt mode, the content clear display, easy to operate, it is fast that the user operates response, realized friendly integration of user interaction functionality;
5, based on portable design, built-in four joint lithium batteries are managed supplying power supply unit by single-chip microcomputer, realization is closed idle unit module to prolong battery flying power, this apparatus structure compactness, light to the Charge Management of lithium battery, be convenient for carrying, be suitable for traverse measurement.
Description of drawings
Fig. 1 is the functional-block diagram of nuclear detection counting assembly of the present invention;
Fig. 2 is the circuit theory diagrams of central processor unit of the present invention;
Fig. 3 is the circuit theory diagrams of signal input processing unit of the present invention.
Embodiment
Below in conjunction with accompanying drawing, describe the specific embodiment of the present invention in detail.
Fig. 1 is the theory diagram of the digital intelligent nuclear detection counting assembly based on blue tooth radio network of the present invention, described nuclear detection counting assembly mainly is made of following several parts: central processor unit 1, signal input processing unit 2, liquid crystal display and unit keyboard interface 3, usb interface unit 4, bluetooth-communication unit 5, calendar time unit 6, acousto-optic warning unit 7 and confession distribution management unit 8, the each several part circuit all is connected with central processor unit 1, managed and controlled by central processor unit 1, the front end of nuclear detection counting is a probe 9.
Signal input processing unit 2 mainly comprises programmable gain amplifier 201, discriminator circuit 202, pulse former 203, anticoincidence circuit 204, gating circuit 205 and threshold adjustment circuit 206, programmable gain amplifier 201 will be amplified to suitable amplitude from the 9 input signal self-adaptations that send of popping one's head in earlier, screen through 202 pairs of signal amplitudes of discriminator circuit then, central processor unit 1 passing threshold is adjusted the examination threshold voltage of circuit 206 control discriminator circuits 202 simultaneously, be shaped to pulse signal through pulse former 203 from the pulse signal of discriminator circuit 202 output Transistor-Transistor Logic levels with fixed pulse width, and export anticoincidence circuit to and realize that threshold is screened the two pulse signals that obtains up and down and meet, if signal amplitude is in, between the following discrimination threshold voltage, pulse signal after then will being shaped is earlier by gating circuit 205, delivering to the counter port of central processor unit 1 then counts, finish and appraise and decide the mark tally function, by whether passing through of central processor unit 1 accurate gating pulse, guarantee the counting precision of central processor unit 1.Described pulse former 203 adopts monostable circuit to realize, the pulse signal of discriminator circuit 202 being exported by the capacity-resistance time constant of regulating monostable circuit is shaped to the pulse signal with fixed pulse width.Described threshold adjustment circuit 206 can accurately be regulated the threshold value comparative voltage of discriminator circuit 202 by central processor unit 1, the difference of upper and lower discrimination threshold voltage is wide voltage, by serving as to change at interval continuously upper and lower discrimination threshold voltage to measure with the wide voltage in road, can record the pulse height distribution profile of input signal, finish the pulse amplitude analysis function.
Fig. 2 is the circuit theory diagrams of central processor unit 1 of the present invention.Central processor unit U1 adopts the ATMEGA128 single-chip microcomputer, and it is 8 the CMOS microprocessors of low-power consumption based on AVR enhancement mode risc architecture.Be characterized in: In-System Programmable Flash with 128K byte, the internal SRAM of the EEPROM of 4K byte and 4K byte, 53 programmable I/O mouth lines, two programmable serial USART, a SPI serial line interface, 8 tunnel 10 ADC have the programmable watchdog timer of individual sheets internal oscillator, and six kinds can be by the battery saving mode of software control.
When equipment inserts USB interface, discern by the principal and subordinate of principal and subordinate's detection signal earlier equipment, when detecting main equipment, will call the main equipment driver, measurement result is deposited in the USB flash disk memory device, storage finishes and will withdraw from automatically; When detecting slave unit, will call the slave unit driver, and the order of response main frame, sending the sign that desired data or reply parameter are provided with success or not to main frame, after receiving exit instruction, will withdraw from automatically.
Fig. 3 is the circuit theory diagrams of signal input processing unit of the present invention.It (is U2 that signal input processing unit 2 mainly comprises programmable gain amplifier 201, model is LTC6915), discriminator circuit 202 (is U3, U4, U5, model is LM211), pulse former 203 (is U9, U11, model is 74121), anticoincidence circuit 204 (is U10 and U12A, model be 7474 and 74LS00), gating circuit 205 (is U12B, U12C, U12D, model is 74LS00) and threshold adjustment circuit 206 (be U7 and U6, model is TLC5620 and OP747).9 signal is linked into signal input processing unit 2 by 50 Ω cables from popping one's head in, as the IN access point among Fig. 3, the present invention can carry out step-by-step counting and amplitude analysis to α and β ray simultaneously, because Alpha-ray energy is bigger, its output voltage amplitude is 4-10v, can directly receive discriminator circuit U3, U4, U5 Alpha-ray pulse output is screened; And Beta-ray output amplitude has only 200-300mv, for improving the resolution of discriminator circuit 202, need amplify Beta-ray amplitude, the Beta-ray amplitude output of different probes is different, for obtaining comparatively suitable Beta-ray amplitude, the present invention adopts programmable gain amplifier 201, as U2 among Fig. 3, by 1 couple of D0 of central processor unit, D1, D2 and D3 (PB0, PB1, PB2 and PB3) control can realize the different gains of totally 14 grades doubly from 0-4096, specifically can be referring to the Fact Book of LTC6915.Central processor unit 1 (be U1, model is ATMEGA128) can be regulated the gain enlargement factor automatically by the output of programmable gain amplifier U2 being carried out the D/A sampling; It is that core devices is realized that discriminator circuit 202 adopts LM211, output by U7 among central processor unit 1 control analog-digital chip TLC5620 such as Fig. 3, realize screening the automatic adjusting of threshold value, because photomultiplier adopts positive high voltage, 9 output signal is negative so pop one's head in, by OP747 (U6) negative sense is carried out in the output of U7 and amplifies, make output voltage 0～-10V between; Because signal is input as means of chaotic signals, be output as irregular pulse signal through the signal after screening, for further improving the counting precision of central processor unit 1, adopt 74121 (being U9, U11) to constitute pulse former 203, can regulate α and Beta-ray pulse width after shaping by the value of adjusting C1, R1 and C2, R2; Beta-ray effective impulse is output as signal and is between the lower threshold value, adopts 7474 (U10) and 74LS00 (U12A) to constitute 204 couples of examination results that go up lower threshold value of anticoincidence circuit and meets, and obtains the output of one road pulse signal; For accurately realizing the synchronous of counting and time, adopt 74LS00 (U12B, U12C, U12D) as gating circuit 205, exported by the PE7_T1_GATE of central processing unit and the pulse of PD7_TO_GATE signal controlling α and β, the pulse of last α and β is carried out step-by-step counting by the counter that PE6_T1 and PD6_TO are connected to central processor unit 1.
Claims (1)
1. based on the digital intelligent nuclear detection counting assembly of blue tooth radio network, it is characterized in that: mainly comprise central processor unit, signal input processing unit, liquid crystal display and unit keyboard interface, usb interface unit, bluetooth-communication unit, calendar time unit, acousto-optic warning unit and supply the distribution management unit; Central processor unit adopts chip microcontroller, control core as whole device, single-chip microcomputer is connected the signal processing of control signal input processing unit, and the pulse output signals of acquired signal input processing unit by its input/output port with the signal input processing unit;
Central processor unit is connected with liquid crystal display and unit keyboard interface, realizes the information interaction between nuclear detection counting assembly and the user;
Central processor unit is connected with usb interface unit, discerns master/slave mode of operation automatically, realizes depositing measurement result in USB flash disk equipment or communicating with host computer;
Central processor unit is connected with bluetooth-communication unit, realizes the remote-wireless monitoring of measurement result and measuring condition, realizes simultaneously carrying out networking with other nuclear detection counting assembly and the result being sent on the monitor terminal;
Central processor unit is connected with the calendar time unit, realizes the calendar time function of total system, for measurement result provides the time and date sign;
CPU (central processing unit) is connected with acousto-optic warning unit, realizes the automatic sound-light alarm function that real-time measurement count pulse is out-of-limit;
Central processor unit is connected with supplying the distribution management unit, realizes the Charge Management to lithium battery, cuts off the power supply of dead zone unit module simultaneously, improves the battery flying power;
Described signal input processing unit is made up of programmable gain amplifier, discriminator circuit, pulse former, anticoincidence circuit, threshold adjustment circuit and gating circuit, described programmable gain amplifier carries out self-adaptation to the input signal from probe and amplifies, amplified analog signal will be gathered port and be sampled by the A/D of single-chip microcomputer, the enlargement factor that single-chip microcomputer is regulated programmable gain amplifier according to the sampled value self-adaptation, final programmable gain amplifier is amplified to suitable amplitude with input signal; Signal process discriminator circuit after the amplification obtains the high-low level signal of Transistor-Transistor Logic level, adjusts the threshold value comparative voltage that circuit is accurately regulated discriminator circuit by the single-chip microcomputer passing threshold; The Transistor-Transistor Logic level signal shaping that pulse former obtains discriminator circuit is the pulse signal that single-chip microcomputer can be counted; Anticoincidence circuit meets the signal that discriminator circuit obtains, if signal amplitude is between the discrimination threshold voltage, then forms pulse output signals; Signal output after the anticoincidence is connected to an input end of gating circuit, another input end of gating circuit is by Single-chip Controlling, if single-chip microcomputer allows gating circuit output, then the counter port that the pulse signal after the anticoincidence is delivered to single-chip microcomputer by gating circuit is counted, finish and appraise and decide the mark tally function, otherwise forbid that the pulse signal after the anticoincidence enters the counter port of single-chip microcomputer;
Described threshold adjustment circuit is accurately controlled by single-chip microcomputer, realization is to the adjusting of the threshold value comparative voltage of discriminator circuit, the difference of upper and lower discrimination threshold voltage is wide voltage, by serving as to change at interval continuously upper and lower discrimination threshold voltage to measure with the wide voltage in road, record the pulse height distribution profile of input signal, finish the pulse amplitude analysis function.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109975855B (en) * | 2019-04-02 | 2023-09-19 | 东华理工大学 | Wide-range intelligent X-gamma dose rate instrument device based on Bluetooth technology |
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| CN102901978A (en) * | 2012-09-17 | 2013-01-30 | 浙江核芯监测科技有限公司 | Radiation dosage monitor |
| JP6005513B2 (en) * | 2012-12-28 | 2016-10-12 | 株式会社東芝 | Digital counting rate measuring apparatus and radiation monitoring system using the same |
| CN103558623A (en) * | 2013-11-04 | 2014-02-05 | 刘国平 | Medical machine room radiological protection real-time monitoring system |
| CN108845517A (en) * | 2018-04-26 | 2018-11-20 | 上海飞来信息科技有限公司 | Anticoincidence circuit and pulse signal detection circuit |
| CN109143941A (en) * | 2018-10-19 | 2019-01-04 | 陕西科技大学 | A kind of detector system high voltage power supply and its monitoring method |
| CN113075720A (en) * | 2021-03-24 | 2021-07-06 | 福州智元仪器设备有限公司 | Alpha and beta ray discrimination system and method based on combined timer |
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