TWI244556B - Simplified design method and device of electronic personal dosimeter - Google Patents

Abstract

A simplified design method of electronic personal dose equivalent and/or dose equivalent rate monitoring device for ionizing radiations. The basic concept of the method lies in the mathematics between the discrimination level of radiation induced electric pulse and response property of a detector to mixed type of ionizing radiations. To meet the regulation requirements, conventional configuration needs multiple filter/detector sets which will greatly complicate mechanical and electronic designs. However, this invention can serve the same purpose with greatly simplified filter/detector and circuitry configurations. It may greatly reduce the size and manufacturing cost of the so called ""dose of record"" electronic personal radiation monitor and offer a performance improvement unveiled before.

Description

1244556 发明 Description of the invention: [Technical field to which the invention belongs] Until now, for workers engaged in ionizing radiation, the reusable passive thermoluminescence dosimeter (TLD: Thermoluminescence Dosimeter) has been the most popular radiation exposure dose for personnel in vitro Its advantages are low cost, mature, and complete regulatory certification. However, in the face of increasingly stringent regulations on radiation protection and social requirements, its important shortcomings are increasingly emerging: (a) Extremely low sensitivity and poor accuracy. The reading cycle is usually in units of months, and its effectiveness is limited to ex post records. Even if there is a high sensitivity product, there is a serious decay effect, and the long-term release of the poor material disappears; (b) its dosimeter reading and offline processing, the meter reading machine increases errors, and the accuracy adjustment control procedures are cumbersome After reading once, all the data will be destroyed, it can not be reviewed, and it is not easy to gain trust. (C) Dosimetry cannot be read directly, can not be based on continuous recording on the spot and immediately issued a warning, establish an effective online real-time radiation protection system, and cannot meet users' high expectations for safety. Li Yiyue said that since the low-cost, low-voltage, low-Z-value silicon photodiodes were successfully used in personnel detectors, since 1990, Shixi debt detectors have been used electronically. The meter is adopted by nuclear power plants in various countries in the world for use by central guards. It replaces the free-cavity dose pen as an auxiliary dose control of traditional glue > 5 badges and thermoluminescent dosimeters. The meter has the following advantages: (a). Immediate personal radiation dose ^ Helps Zhenzhen to resolve the radiation button in his workplace, through the crisis, to provide work μΓδ degrees of safety, full sense, easy to achieve radiation dose control is extremely important, ， Reasonable suppression and purpose, (b) · It has 100 times higher radiation sensitivity and direction χΓ type accurate measurement performance than thermal hair meter, plus it can be directly connected with the computer for data exchange, which is not appropriate; ^ It can integrate the functions of alarm assistance and dose control in the machine; ⑹. Contains low cost to improve physical performance, and is based on a large number of program limits, ⑽4 accuracy, and adds a variety of human / regional radiation agents ( d) Using modern cast body remotely ^^ human tube solution _ 'Μ 致increase cost. Kubozai, 4-Technology, with rain on the right, the original recording of radiation dose data is almost permanent, and can be used to create localized pollution images from the two-dimensional array chip sensor, replacing the traditional wired and wireless digital of the traditional 1244556 i-chip. The network environment is suitable. If there is a need, the user can record the dose data of the round shot. It can be monitored in any way. [Previous Technology] Zhang Zhiΐί ΪΓ 员 Ϊ 外 贝 = 一 _5 Development can replace the existing heat. The luminous dosimeter and film dosing rate are 4-way dosage meters, which perform in vitro exposure, strong penetration and superficial equivalents, and are covered by the scope of “Lin Miscellaneous Protection”. Suppose that ^^ TTTf = Faotoufadiao is specially designed for medical and non-medical personnel dosimetry to measure photon and beta-ray radiation. They are respectively responsible for the system's equivalent dose and equivalent equivalent dose. . Due to the extremely high complexity of the production of Dugong's personnel, even if it is in advanced countries, it is not a human settlement. Only a few EU countries can produce and claim that it can replace tld. Due to the complex structure and increased power consumption of electronic dosimeters that require dose management (App D Dosimetry Service, or Dose of = ord), the volume and weight of radiation adjustment and calibration are complicated, the cost is high, and it is not easy to be widely used in the market. Accepted. The car is big. Due to the technological evolution, the electric control system has been voiced by the purely control unit of the New Zealander, and since 1994, many European Union countries (English, French, Norwegian) have officially Recognize the legal validity of the electronic human vigilance alarm record. The Society of Miscellaneous Touch (H and the International Electrotechnical Commission (IEC) has also set up a working group to review the dosimeter regulations for personnel such as Qu 1 13 27 and 45B, and will be electronic Traditional people measuring Scope. Although two sets of sliver circuits are used with different filter-type electronic manometers to meet the regulatory requirements for statutory agents, the developed products, whether in production, quality control or calibration, are extremely complicated and appear redundant and consume power. It is impossible to reduce the size and hinder the development of lighter enemy equipment. 1244556 [Content of the invention] The design method proposed by the present invention is to apply modern digital production with low cost and low power consumption. It has multiple digital / analog converters (Digital t0 Analog Converter) output microcomputer = unified single film and its powerful computing power 'Prefers low production cost, extremely power saving and portability * rejection, eliminating the traditional three sets of independent detector circuits with fixed low-energy light beam The complex method of identification and translation is replaced by four sets of adjustable level electronic discriminators. Only one set of detection and detection circuit is required with the quotient of no outfitting material_photodiode chip, using the tilter and the discriminator threshold The mathematical correlation between the voltage and the change in the energy response of the radiation can be directly obtained by the program system. The result of the system depends on the change of the response characteristics of the stored energy. The wire matrix, the vertical wire type calculation and the calculation of the radiation class and the ratio, and then calculate the correct equivalent dose data can improve the instrument's ability to identify and correct the radiation, while simplifying the system's hardware design complexity and reducing power consumption. Reference is made to the principles of the invention and solid green design. The radiation detection head and signal processing circuit are suitable for the commercial radiation detection head of the present invention, which is a silicon photodiode. Because the atomic sequence and density are closer to human tissue, Low cost, small size (~ 〇lcc), low working voltage, suitable for radiation practitioners to carry around; electronic equivalent dose monitor applications such as tritium emission, light emission etc. due to its working principle Each absorption—light emission of particle energy, generates a free charge and then generates a micro-press pulse. The photodiode's photodiode radiation detection signal processing circuit is shown in Figure i. It must rely on filters and filters (1〇 Unless the personnel are in the equivalent dose measurement range of radiation particles (such as: alpha rays), Shi Xi photodiodes (moving) absorb light-emitting particle energy to generate ionized charges, charge-sensitive preamplifiers (103) and polar _ Compensation discharge: a circuit (1〇4) to the silicon photodiode charge signal amplified by the absorption of radiation particles and Crystallization of generating ionizing energy, and then into the differential amplifier (105). The discrimination amplifier is a comparator. The pot is used to compare the height of the voltage pulse sent by the preamplifier with a preset threshold voltage ν. . Then 1244556 = number n combined with the micro processing logic pulse occurrence and multi-recruitment, you can use the digital signal processing circuit (107) such as :: number program to calculate the radiation field intensity?, ^ To the radiation dose. The use of threshold voltages, on the one hand, filters out the noise generated by silicon photoelectricity and the body mouth; on the other hand, because of the correlation between the shape of the voltage pulse and the statistical distribution of the amount of radiation particle species, as long as the concealed # 之The design of electronic hardware and software can use the analysis of moral training to replace the special design, and the interim design can calculate the correct equivalent dose. The traditional method of resolving radiant particles is, 'Which type is used, the legal person's external exposure radiometer must be able to provide the equivalent equivalent of H (l 〇) and the epidermis below the epidermal ο; / mm depth of the equivalent equivalent to find 〇〇. According to the working principle of the legal personnel external exposure radiation dosimeter composed of several tens of systems at present, the standard external exposure, radiation, and efficacy dosimeter must be able to provide the correct system of the following radiation particles: ⑴ · $ Ray: Since the maximum amount of Emax = 500keV (Such as: Sr-90), 700keV (such as: Tl_204, Cl-36), to 2.3MeV (such as Υ-90); (2) · Gamma rays from Am-241 (60keV) to N-16 (6MeV ); (3) Z-rays from M30 (< 20keV) to H150 (120keV). The standard design is either passive (LiF: Mg, Ti, Hot Pressed thermal light-emitting wafer) or active (Si PhOtOdiode, pulse electronic amplification and counting as shown in Figure 2), using three sets Radiation detectors with filters made of different materials (eg. The equivalent dose H (10) in the deep subcutaneous layer with a 1mm thick AgS plastic plus a 0.4mm Teflon combination filter, equal to 1000mg / cm2; subcutaneous 70um Shallow equivalent dose Η (0 · 07) uses 38um Aluminized Mylar; consider tablets, equal to I7mg / cm2 ... etc) to simulate the attenuation effect of free radiation caused by penetrating the human skin epidermal tissue at different depth conditions, and then measure them separately ./5, χ, y The radiant energy transmitted by various wheel rays to the debt detector is compared and combined according to the type and energy of the radiated radiation that can be tolerated. 〇), and Η (0.07). Therefore, from the design point of view, the design of any legal personnel dosimeter must have two functions: one is to identify the type of radiation, the energy range and the ratio of the personnel to be exposed; the other is to convert the measured value to the basis of radiation protection according to the discrimination result. Physical quantity. 1244556 Theoretical basis for resolving radiant particles in electronic circuits. The present invention abandons the traditional method of using precision radiation filters with multiple miscellaneous devices. Instead, it uses warships and identification agencies to operate as dragons. -Only the detector can achieve the identification of the type and energy of light rays, which can greatly reduce the design complexity, power consumption, and power consumption caused by the electronic dosimeter circuit and mechanism design. Necessary means for miniaturization of electronic legal equivalent dose monitor. We use an example to illustrate the principle of identifying the type and energy of light rays electronically: we only need to-only remove the resin chip on the surface of the surface of the package. BPW 34FAS or similar element) with a coating point on it, a film that can be penetrated by χ and r radiation (for example: 38mn Aluminized Mylar diaphragm, 17mg / cmA2), with a standard preamplifier and pulse shaping on the back of the detector The circuit, and then the pulse discriminator of the adjustable low limit level (Vth) discriminates the shaped radiation pulse from the noise, and directly turns it into a digital logic pulse. Figure 2 shows the effect of the low limit setting value (Vth) of the pulse height discriminator on the sensitivity (cps / mrem / hr) characteristics of the silicon radiation detector under different energy χ + τ and recording rays. . After finishing the drawing 2, if we use \ = 2〇1 ^ as the standard value, check the sensitivity of radiation particles of different types and energies under a fixed detector voltage ^

The effect of the change in Vth results in the relative sensitivity characteristics as shown in FIG. 3. Since silicon = radiation 4 detection is different for light-emitting particles of different types and energies due to different interactions, the sensitivity varies considerably with changes. We can use this difference to detect a single silicon radiation detector h and The signal generated by the analog pulse amplification integer circuit uses the value of the comparator ^^ to make use of the characteristics shown in Figure 3 above to identify the type and energy of the radiation particles, which is equivalent to the function of an analog filter, and at the same time, it is equivalent to three different Equivalent radiation intensity measurement of the measuring range detector. ’With this design, the effective equivalent dose or dose rate caused by the external exposure of the radiation to human tissue can be easily calculated after the calibration of the standard radiation source. Because of the existing semiconductor electronics technology, the above-mentioned pulse height discriminator limit voltage adjustment can be easily achieved by using a microcomputer chip with a digital analog conversion interface, and it has the flexibility to control the digitizable program. Therefore, the invention was proposed early. < The electronic method of chastity detector is far more in line with the practical needs of future devices toward miniaturization and intelligence. Method for identifying the radiation particles of a single detector This section will describe in detail how to use the response characteristics of the single detector of Figures 2 and 3 to various light-emitting particles to measure the I for practical circuit design. The signal / noise quality of the polar body detector and preamplifier must reach the applicable range of the light energy that can be detected. For example, the cold particles can measure at least the average energy of T1-204 250keV and the effective energy of χ ray M30 20keV. Due to the design countermeasures of a single chastity detector, we must apply the least shielding to the sensing direction of the diode detector, and only add a call on it. Fortunately, X, Y § ray can penetrate the film (38um Aluminized Mylar filter, 17mg / cmA2), and directly use the unpackaged silicon photodiode detection chip as a debt detector.

Secondly, we adopt the circuit shown in Figure 4 to use multiple sets of pulse height discrimination circuits with different vth setting values (for example, five sets of 20, 40, 60, 80, and 100 mV) with independent counters. The processed detector radiates pulse signals and records them synchronously, assuming that the pulse counting rates obtained are C (20), C (1 2 3 4〇), C (60), C (80), and C ( 100), with reference to Figures 2 and 3, and according to the US Department of Energy ’s DOELAP (Department of Energy Laboratory Accreditation Program), the standard radiation particles required for legal dosimeter calibration are divided into The following categories: 12 1 .Category IIJV-high energy r-ray, Cs-137 (E = 662keV); 2.Category Ⅰ, ΙΙΙΑ- low energy χ-ray, M30 (average energy Eav = 20keV), M60 3 (Eav = 27keV), M100 (Eav = 42keV), M150 (Eav = 4 70keV), H150 (Eav = 120keV); 1244556 ⑶.Category VA, VB, VC-high and low energy / 3 rays, Sr-90 / Y-90 (Emax = 2.3MeV )

Tl-204 (Emax = 760keV) 〇 In DOELAP, in order to determine the credibility of legal dosimeters, in addition to requiring the dosimeter to accept the above types of radiation particles to irradiate individually to check the accuracy of the radiation dose readings, different radiation particles are required. Mixed irradiation, such as high and low energy photons (III & IV), high energy photons increase (low) energy beta (IV & V), low energy photons increase (low) energy beta (III & V) ... etc. . Therefore, we use Rhg (662keV Cs-137, 1.25MeV Co-60 and other high-energy gamma (X) photons) and Rmx (30-60keV low-energy NIST standard X-ray source) according to the characteristics of Figure 3 and ⑴-⑶ classification. , Rlx (low-energy NIST standard X-ray photon source below 20 keV), Rhb (Y-90 / Sr-9〇 high-energy beta particles), and Rlb (T1- 204 sweet low-energy beta particles) respectively represent the intensity of different radiation particles ( Expressed as H (〇07) shallow equivalent radiation dose rate mSv / hr). Therefore, we can decompose the total pulse count rate c (Vth) into the count rate Cxx (Vth) components of different radiation particles, and have their corresponding response factors ρχχ (counts per second per mSv / h), as shown in the following formula (1) As shown: c (Vth) = ^ Fxx (Vth) xRxx (1)

XX B can be obtained from the attached figure 2 using the calibration statistics of the individual radiation source (all response factors in p under different th & ㈣ ㈣ 灿 Canzhen value ′ see attached table:

60 80 100 19 ± 1 15 ± 1 15 ± 1 19 ± 1 17 ± 1 17 ± 1 28 ± 2 22 ± 2 18 ± 2 1 48 ± 10 34 ± 8 23 ± 5 36 soil 2 11 ± 1 2 · 5 ± · 5 13 I244556 Formula (1) can also be rewritten into matrix and vector types, such as formula (2): (2)

C = [F] ®R hg,

Among them, the vectors C and R represent ((: (20), (: (40), (: (60), (: (80), (: (100)), and (1: Rib, Rmx, Rlx)) In the [F] matrix, there are all the reaction factors Fn at different Vth. Although the five-element simultaneous equations are required to solve, five sets of simultaneous equations obtain five sets of Rxx unique solutions, such as the formula: XX (3)

R = [F] ~ l0C where [F] 1 is the inverse of the [F] matrix. In addition to using formula (3) to obtain mathematical solutions through matrix operations, we can also see from the characteristics of Guan 3 that C (2G) to c (4 is exposed to c (6 ()), and c (i〇〇) The relative changes show different types of Rxx, which are summarized in the following table: ----- · A small example of the ray emission particle and its separation fch Example Vth (mV) C (20) / C (40) C (20) / C ( 60) C (60) / C (100) Rhb 1.8 2.7 U —Rib 1.3 1.5 1.1 1.3 1.6 1.6 —Rmx 1Λ 1.3 2.0 1.9 4.5 1.8 f In Table 2, we can predict the working environment conditions and the three groups of ratios in the table first. ^ / Read fr _RXX components, and omit the Fxx corresponding to the main RXX components, simplify the [F] matrix element r to guess the [F *] matrix, calculate the inverse matrix bucket], and substitute it into the formula ⑴ of the joint cube two possible Approximate solution. Substituting the approximate solution back to the formula 反, we can repeat the shoulder-nose method and obtain the other Rxx unique solutions: 1244556

Rn + l = Κη + ^] ~ ι ® (C- [F] ®Rn) (4) In the case of convergence of formula (4), we can confirm that the answer has been obtained according to the conditions of formula (5): deep and shallow Equivalent dose H (10), converted to Η (0 · 07) In the previous section, we used the Fxx (Vth) parameter in the reaction coefficient matrix to predict the value and measure different C (vth) values at the same time. H (007) Shallow equivalent radiation dose rate intensity (Xinyi), 1 ^, 1 ^, 1 ^, and 1 ^ (11 ^ / 111 :), and so on. According to the American national standard for human dosimeters ANSI 13.11, the equivalent radiation dose rate intensity of H (10) deep caused by different energy photons can also be converted by multiplying the equivalent radiation dose rate intensity of the shallow part by a certain factor. For the conversion table, please refer to the attached table III: 'attached table III · Hs (〇.07) / Hp (l〇) factor of different radiation particles t__ radiation particles Hs (0.07): Hp (l〇) Factor Rix (M30,20keV) 1.0: 0.47 --Rmx (30-70keV) 1.0: 0.8-0.9 Rig (80-250keV) 1.0: 1.07 Rhs (> 662keV) 1.0: 1.0 _ Rib? Rhb (Beta) 1.0: 0.0 [Embodiment] To manufacture a complete electronic statutory dosimeter device, as shown in FIG. 5, the T application device of the present invention includes at least-group as off! The radiation bumper ⑽) and the light-emitting detection signal processing circuit (502), the material, volume, and the type and energy range of the radiated 15 1244556 line emitted by the pine to the object on the silent side (as described in the previous section ^ 3,% , Or ray such as r), perform effective absorption and electrical renewal, including touching n light supply components to lift and tilt each voltage to perform radiation energy absorption and signal conversion; The logic pulse signal converts and counts the electronic device ㈤). Its Wei lies in that the signal generated by the detector is added, and the fixed light shot pulse is discriminated from the noise by a comparator with five different thresholds and preset low limit levels. „Generate five sets of standard digital logic signal outputs, with five sets of digital pulse event counters and necessary microcomputer interface circuits; — iff J ^ ^ ^ private microcomputer chip (504) and peripheral hardware (505) , If possible, you can choose to include five sets of digital pulse event counting Wei Wei microcomputer chip, directly drive digital logic signals, and according to the pulse measurement results and the manufacturer's instructions, according to the law 'executive, kind of bribery, recognition Superficial dose Execution of brain dose analysis software design task: In the electronic silk meter of the present invention, the microcomputer crystal #must be r in ·,, * ΐΓ! = Take: The microcomputer chip completes the hardware connection and measurement with the radiation head 1 ' The source and succession of the radioactive source are input and read from the brain data interface of the occultist. `` Fine = limit m (5) ship points_convergence ^ Calculated by the difference. The equivalent response of the deep and shallow equivalent doses of formula (3) The value of the moment $ 2 is as close as possible, and the two are not. Both are fine detection and inspection axis processing circuits. In other cases, the fresh shot oxygen specified by DGELAP is used. " = = The detailed classification of the line. Materials, such as the protection of the spokesman, the parameters such as the manufacturer's body, the pre-master (two = the industry ’s radiation reading permission touch code, deep and _ equivalent dose ^ rate warning and alarm limit material After confirming the above parameters, save the non-volatile = 16! 244556 data memory application, and then start the program. The microcomputer chip will execute the digital / analog conversion interface to complete the setting of five sets of identification voltage thresholds, and then enable radiation. The detection head enters the collection of five sets of counting data. 2. Analysis of the material · When the five sets of round pulses are completed After the counting data is measured to a sufficient number and time, the microcomputer chip can be instructed to perform the radiation source identification and analysis. The main contents include: The ice dead period correction and radiation source component estimation work. The purpose is to use five sets of counting data to use the second table. Ratio comparison or classification method of radiation operation identification code, find out the main components of the measured radiation field in advance, determine the simplified equivalent dose matrix of the shallow and deep part of the guess, and calculate according to formulas (3), (4), (5), get each The correct equivalent dose value of the radiation source composition.

Equivalent dose value display and alarm of microcomputer chip depth: When the dose data is confirmed credible and completed, the firmware program can order the computer to execute the dose according to the requirements of the person's radiation protection tube industry. Value display scale report, design can also do the function of specific data recording. 4 · Number 2 Poor Material Recording: In order to cooperate with the establishment and difficult calculation of the radioactive component and dose calculation database, the microcomputer chip must be able to perform data connection with other computer hosts and the shell material recording and recording 4 functions. See Figure 6 for a typical software program flowchart.

17 1244556 [Schematic description] Figure 1: Schematic design of standard silicon photodiode radiation detector circuit. Figure 2: The characteristic curve of the sensitivity of the single-filter single-detector circuit to different energy radiations as a function of the lower limit voltage (Vth) of the discriminator. Figure 3: With Vth = 20mV as the reference, the characteristic curve of the relative sensitivity of the single filter single detector circuit to different energy radiations as a function of the lower limit voltage (Vth) of the discriminator. Figure 4: Block diagram of the circuit concept design of a single filter single detector circuit with multiple sets of different vth reference discriminators and random pulse event counters. FIG. 5 is a schematic block diagram of a microcomputer single chip complete system design used in the embodiment. FIG. 6: The microcomputer single chip firmware design flow chart used in the embodiment. 2 · Description of main component symbols Figure 1: (101) filter, (102) silicon photodiode, (103) charge-sensitive preamplifier, (4) pole-zero compensation amplifier circuit, (105) discrimination amplifier, ( 106) Threshold voltage Vth, (107) Digital signal processing circuit including counter, microprocessor, and calculation program. Figure 2: (201) M30 X-ray, average energy <20keV; (202) M60, M100 M150 X-ray, average energy 27-68keV; (203) Medium and high energy Gama and X-ray, average energy 60keV- 6MeV; (204) Sr-90 / Y-90 average energy 546keV β-ray; (205)

Cl-36, Tl-204 average energy 246keV β-ray. 1244556 Figure 3: (30) M3O X-rays, average energy <2kekeV; (302) M60, M100, M150 X-rays, average energy 27-68keV; (303) Medium and high energy horses and X-rays , Average energy 60keV-6MeV; (304) S1-90 / Y-90 average energy 546keV β-ray; (305) C1-36, thorium-204 average energy 246keV β-ray. Figure 4: (401) single filter single detector pulse integer amplifier circuit; (402) multiple sets of parallel discriminator and random pulse event counter circuits; (403) multiple sets of digital control threshold generator; (404) Microcomputer main controller.

Figure 5: (501) Radiation detector consisting of a filter and a silicon photodiode; (502 difficult to shape and amplify electronic circuits; (503) multiple sets of parallel identification / counting circuits; (504) Interface electronic circuit; (505) microcomputer chip main controller. Figure 6: (601) start; (602) complete self-test, confirm normal setting of working parameters, start radiation detection; (603) multiple sets of counting data collection, The source component identification module is started; (604) Modify the source identification component; (605) Establish a dose matrix and perform repeated calculations; (606) Convergence judgment (607) Complete the dose component calculation output; (608) Dosimeter The communication module starts; (609) continues or stops; (610) ends.

19

Claims (1)

1244556 The scope of the patent application: 1. Measure H Measure the quantity of materials __ Exposure to the deep and shallow equivalents === 4 Electronic device design method for the safety protection of wheel firing, this method absorbs free radiation (γ , * Ray) The kinetic energy of the particles is converted to a positive value by the ratio of electricity and the magnitude of the absorbed kinetic energy is positive. The voltage pulse generated by the surface is finely set and its type is close to symmetrical. The Mortise Knife is characterized by a similar time constant to the peak rise and recovery, and a gentle peak voltage waveform; (3 = appropriate electrons. The fixed-radiation voltage pulse sent in step (2) passes the preset pulse two The low limit paste H, removes noise, and transforms into digital pulses. Due to the stereotype, the digital pulse generation rate and different light shot types and energy components pulse ^ peak height points have determinable scales; Generate (4) perform pulse counting and recording in parallel with multiple sets of non-_set Jianqing pressure counting long steps in parallel; (5) = The execution of step (4) is satisfied—When the time and counting conditions are fixed, the main microcomputer controller fetches multiple sets of pulse occurrence rate count values recorded in the ⑷ into the main controller data memory. Form a measurement array, and match the pre-stored radiation feature matrix to perform the mathematical data calculation processing required for the source component identification and repeated calculations; (6) use the mutual comparison relationship between the measurement array elements of (5) and the pre-stored radiation feature matrix comparison, First speculate the main source components, and generate a simplified ray feature matrix and inverse matrix. The simplified inverse matrix is multiplied with the measurement array to produce the deep and shallow equivalent dose arrays of the main source components. (7) Step ( 6) It can also inform the main controller of the microcomputer when setting the radiation work permit code of the user, and according to the simplified ray feature matrix and inverse matrix, and produce the deep and shallow surface of the main source component Equivalent Dose Array; 20 1244556 (1) Take the step (6) and ⑺ as the initial value of the dose array to simplify the inverse matrix and the complete ray feature matrix, and establish iterative substitution calculation procedures. Wait until the predetermined convergence conditions are met; & (9) On the right, it is found that step ⑻ fails to converge. You must return to step ⑹ to change the main source component and re-execute steps ⑹ to ⑻. If the number of failures exceeds 3 times, give up the calculation and return. Steps (4); (10) Repeat steps (1)-(9), continuously measure light-emitting components and equivalent doses, and implement functions such as data recording, transmission, display, and warning according to the predetermined working mode, to Until receiving the machine request. + An electronic device carried by a person, the device can measure 3 external light free rotations of the human body and is equivalent to the superficial surface and emits an alarm to provide radiation health safety protection. This device-one or more with approximate 〇. 〇7_The characteristics of human epidermal tissues are light-emitting detectors (501) composed of single cymbals and Shixi photodiodes that can exclude non-measurement objects. Its purpose is to generate electrical pulse signals by sensing free radiation particles; provide 1 Pulse shaping and amplification electronic circuit (502) for signal conversion of chastity detector. The converted pulse signal is analyzed by multiple sets of parallel discrimination / counting circuits⑼3); the multiple sets of parallel discrimination / $ count circuits can be used for different The pulses generated by the free light particles on the surface of the detector are analyzed and generated by the counting and distribution characteristics of the count value, and the results are transmitted to the microcomputer chip for mathematical > 胄 # and fraction analysis; a set of operations using programs The main controller of the microcomputer chip (5), on the one hand, input the radiation pulse height distribution information from multiple sets of parallel identification / counting circuits (503). Passage (504) work together to provide mathematical calculations to monitor the power state, the value and status display, plural sets of differential threshold voltage generator, counter and control resources taken Qing, wireless data transfer, abnormal sound and light alerts and other functions of the program. 3. According to the electronic device described in item 2 of the scope of the patent application, the Shixi Optoelectronic Diode Detector in the light-emitting primary detector (501) composed of the single filter and the Shixi Optoelectronic diode can be used. In addition, it is replaced by (i) organic or inorganic 21 1244556 doped scintillation crystal with photo-sensing element or (ii) other semiconductor materials, as long as its detection mechanism for radiation particles is a one-to-one pulse conversion method, and volume efficiency is for radiation The dosimeter detects the subject to perform effective absorption and electrical signal conversion. twenty two