公开(公告)号：JPH10197639A

公开(公告)日：1998-07-31

申请号：JP529597

申请日：1997-01-16

Applicant: ALOKA CO LTD

Inventor： TATEISHI NAOKI

IPC: G01T1/16 ,  G01T1/36

Abstract: PROBLEM TO BE SOLVED: To obtain an environmental radiation monitor performing energy calibration based on energy spectrum in which erroneous energy calibration is prevented when the state of environmental radiation is abnormal. SOLUTION: An abnormality decision section 50 makes a decision whether the state of environmental radiation is normal or not based on an environmental dose data determined at a dose operating section 26 or the energy spectrum of environmental radiation formed on a spectral memory 30. When a decision is made that the state of environmental radiation is normal, a calibration control section 52 operates a spectrum utilization calibrating section 32. Consequently, the spectrum utilization calibrating section 32 performs an energy calibration processing based on an energy spectrum in the spectral memory 30. When a decision is made that the state of environmental radiation is abnormal, the calibration control section 52 operates a temperature utilization calibrating section 44. Consequently, the temperature utilization calibrating section 44 reads out a calibration coefficient corresponding to the temperature at a probe section 10 abtained by a temperature sensor 40 from a temperature calibration table 46 and performs energy calibration using the calibration coefficient.

公开(公告)号：JPH09304542A

公开(公告)日：1997-11-28

申请号：JP12509196

申请日：1996-05-20

Applicant: ALOKA CO LTD

Inventor： YANO KENICHI ,  MATSUBARA SHOHEI ,  KAWAGUCHI HIROSHI ,  TATEISHI NAOKI

IPC: G01T1/36

Abstract: PROBLEM TO BE SOLVED: To provide a radiation measuring apparatus in which an energy value can be calibrated simply without using a radiation source for calibration. SOLUTION: An environmental radiation is detected by a detection part 10, and the energy spectrum of the environmental radiation is found by a multichannel analyzer 22. A peak detection part 32 investigates a prescribed search range in the energy spectrum, and it detects the photoelectric peak of K which is distributed widely in an environment. In a reference-value storage part 34, the correct energy value of the photoelectric peak of the K is stored as a reference value. In a comparison processing part 33, the channel of the photoelectric peak detected by the peak detection part 32 is compared with the channel of the reference value stored in the reference-value storage part 34. On the basis of a compared result, a voltage or a gain instruction part 35 adjusts a voltage instruction value to a high-voltage power supply 14 or a gain instruction value to a main amplifier 18 in such a way that the channel of the photoelectric peak is brought close to the reference value.

公开(公告)号：JPH09288183A

公开(公告)日：1997-11-04

申请号：JP10035296

申请日：1996-04-22

Applicant: ALOKA CO LTD

Inventor： TATEISHI NAOKI ,  OSHIMA TOSHINORI

IPC: G01T1/00

Abstract: PROBLEM TO BE SOLVED: To simplify a transmission operation for measured data and personal identification information in a personal dose management system sharing a personal dosimeter among a plurality of persons. SOLUTION: A transmitting part 12a for transmitting dose data obtained through measurements and a receiving part 12b are provided in front of a personal dosimeter 10. A card holder is also provided. An IC card 20 displaying personal identification information of a user using the personal dosimeter 10 in the form of a bar code is detachably loaded to the card holder. A fixed-type data-receiving unit 30 receives measured data from the personal dosimeter 10 at a receiving part 32a and reads the bar code of the ID card 20 by a bar code reader 34, thereby obtaining the personal identification information.

公开(公告)号：JPH07306268A

公开(公告)日：1995-11-21

申请号：JP9733794

申请日：1994-05-11

Applicant: ALOKA CO LTD

Inventor： TATEISHI NAOKI

IPC: G01T1/17 ,  G01T1/24

Abstract: PURPOSE:To provide a personal dosimeter in which the operation can be checked automatically using natural radiation. CONSTITUTION:A pulse detected by a detector 12 is passed through a pulse interval measuring circuit 28 and the pulse interval being measured is compared with a reference value by a comparison/decision circuit 30. The reference value is set based on the pulse interval of a measured natural radiation. When the reference value is exceeded, an alarm signal is outputted because malfunction of the detector 12 is doubted. Alternatively, the count rate may be compared with a reference value.

公开(公告)号：JPH03229187A

公开(公告)日：1991-10-11

申请号：JP2666690

申请日：1990-02-05

Applicant: ALOKA CO LTD

Inventor： KATO TORU ,  TATEISHI NAOKI ,  YANAI TOSHIO ,  OSHIMA TOSHINORI

IPC: G01T1/17

Abstract: PURPOSE:To easily read a counting rate value by displaying only digits which are converged on a specific criterion among the respective digits of the counting rate value and displaying specific characters other than numbers as other digits. CONSTITUTION:A control part 28 decides the effective digits of the counting rate value calculated by a divider 24. Then when a digit of 10(D10) are decided, it is judged whether or not the relative standard deviation (sigma) of the total number (N) is smaller than a predetermined effective digit criterion m10 for the digit of 10; when it is judged that sigma >= m10, an ineffective display of all digits, i.e. a display of specific characters other than numbers or a blinking display of specific intervals is made. When it is judged that sigma = m1, the blinking display as the ineffective display of digits other than the digit of 10 (D10) is made.

公开(公告)号：JPH01187488A

公开(公告)日：1989-07-26

申请号：JP1235188

申请日：1988-01-21

Applicant: ALOKA CO LTD

Inventor： MATSUBARA SHOHEI ,  TATEISHI NAOKI ,  YANAI TOSHIO ,  KOYANO AKIRA

IPC: G01T1/17

Abstract: PURPOSE:To decide radioactivity contamination in a short time by making an advance to a next decision step when a set stepwise alarm level is exceeded and deciding that the contamination is below an alarm level when not. CONSTITUTION:A radiation monitor circuit is equipped with a detector 10 which measures the radioactivity of a body at respective parts and a timer 12 which outputs a signal at prescribed intervals of time. Further, a decision level setter 14 which sets the alarm level and stepwise alarm level for deciding the radioactivity contamination and a comparator 16 which compares the outputs of the detector 10 and setter 14 with each other are provided, and the output of the comparator 16 is supplied to a display device 18. This constitution divides a conventional measurement time into respective stages and a final alarm level is decided with stepwise alarm levels set in respective decision steps. Consequently, the decision is finished early from persons who are less contaminated, and the radioactivity contamination is measured speedily.

公开(公告)号：JPS5770475A

公开(公告)日：1982-04-30

申请号：JP14635380

申请日：1980-10-21

Applicant: Aloka Co Ltd

Inventor： IKEDA TERUO ,  TATEISHI NAOKI

IPC: G01T1/17 ,  G01T1/185

CPC classification number: G01T1/185

Abstract: PURPOSE:To form a device maintaining always a normal operation state by correcting zero adjustment and sensitivity by using switching automatically at predetermined times, a reference ray source control device and comparators. CONSTITUTION:The electric charge gathered at the current collecting electrode 12 of an ionization chamber 10 according to radiation dose is converted to voltage by an electrometer 14, and the voltage is digitized by an A/D converter 16. The digital signal is recorded and displayed with a display device 20, a printer 22 and an integrator 24 via a zero point adjusting circuit 100 and a sensitivity correctinng circuit 200. Zero point adjustment and sensitivity correction are carried out by driving flip- flops 44, 68 by the signal of a timer 42 and changing over switches. Select switches 30, 40 are turned on to input the zero adjustment output to a register 32, by which zero point is adjusted. A sensitivity correction value is outputted by the value of a register 58 obtained by irradiation with a reference ray source 46 and the reference value of a register 60 by opening a shutter 50. Zero point as well as the upper and lower limit values of sensitivity are applied to comparators 78, 80, and an alarm is emitted when out of these values. Thereby, the normal operation is continued.

Abstract translation: 目的：通过在预定时间自动切换校正零点调整和灵敏度，构成一个始终保持正常运行状态的设备，参考光源控制装置和比较器。 构成：根据辐射剂量聚集在电离室10的集电极12处的电荷通过静电计14被转换为电压，并且电压由A / D转换器16数字化。数字信号被记录和显示 具有通过零点调整电路100和灵敏度校正电路200的显示装置20，打印机22和积分器24.零点调整和灵敏度校正通过驱动触发器44,46由定时器的信号来执行 42并切换开关。 选择开关30,40打开以将零点调整输出输入到寄存器32，由此调整零点。 通过用参考光源46照射获得的寄存器58的值和通过打开快门50的寄存器60的参考值来输出灵敏度校正值。零点以及灵敏度的上限和下限值是 应用于比较器78,80，并且在这些值之后发出报警。 由此，继续正常运转。

公开(公告)号：JPS5728273A

公开(公告)日：1982-02-15

申请号：JP10245680

申请日：1980-07-28

Applicant: Aloka Co Ltd

Inventor： IKEDA TERUO ,  TATEISHI NAOKI

IPC: G01T1/17 ,  G01T1/185

CPC classification number: G01T1/185

Abstract: PURPOSE:To perform accurate measurement of the amount of variation at all times by automatically updating the zero adjusting value at a specified interval, and adjusting the zero point of a detected signal by said zero point adjusting value. CONSTITUTION:Electric charges collected 12 in an ionization chamber 10 are converted to a voltage signal. ON and OFF operations of a switch 30 in a meter 14 is controlled by a switching signal from a zero point adjusting circuit 18. The output of an AD converter 16 is supplied to a register 36 when the switch 30 is turned OFF and supplied to a register 32 when the switch 30 is turned ON. The outputs of the registers 32 and 36 are operated 40, and the zero point is adjusted. When an FF 44 is inverted for a specified time by the output of a time 42 in a circuit 18, a contact 38 is turned OFF, and the supply of signal to the register 36 is stopped. When a signal is outputted Q from the FF 44, the switch 30 and the contact 34 are turned ON, and the detected signal under the zero checking state is supplied to the register 32, and the zero point adjusting value is updated.

Abstract translation: 目的：通过以指定的间隔自动更新零点调整值，并通过所述零点调整值调整检测信号的零点，始终对变化量进行准确的测量。 构成：电离室10中收集的电荷12被转换为电压信号。 仪表14中的开关30的接通和断开操作由来自零点调整电路18的开关信号控制。当开关30断开时，AD转换器16的输出被提供给寄存器36，并将其提供给 开关30接通时的寄存器32。 寄存器32和36的输出被操作40，并且调整零点。 当通过电路18中的时间42的输出将FF 44反相指定时间时，触点38断开，并且向寄存器36提供信号。 当从FF44输出Q信号时，开关30和触点34接通，零检查状态下的检测信号被提供给寄存器32，并且更新零点调整值。

公开(公告)号：JPS5713380A

公开(公告)日：1982-01-23

申请号：JP8725980

申请日：1980-06-28

Applicant: ALOKA CO LTD

Inventor： TATEISHI NAOKI

IPC: G01T1/20 ,  G01T1/17 ,  G01T1/208 ,  G01T1/38

Abstract: PURPOSE:To discriminate a waveform of an output of a radiation detector consisting of a ZnS(Ag) scintillator and a plastic scintillator, and identify alpha-rays and beta- rays by means of a crest value. CONSTITUTION:A radiation detector 10 consists of a ZnS(Ag) scintillator for detecting alpha-rays and a plastic scintillator for detecting beta-rays. The output of the detector 10 is inputted to first and second differentiation circuits 14 and 16 through an amplifier 12. The differentiation circuit 14 has a time constant which is longer than that of the differentiation circuit 16. The output of the differentiation circuit 14 is inputted, as it is, to a crest comparison circuit 18, and the output of the differentiation circuit 16 is inputted to the crest comparison circuit 18 through a delay circuit. By means of the crest comparison output, the output of each differentiation circuit is produced into a gate signal of an output supplied through crest discriminating circuits 24 and 26. Each gated output is supplied to count circuits 32 and 34 through a OR circuit together with an output of a crest discriminating circuit 40. This permits the discrimination of the output, whose crest value is higher than a given crest value, as alpha-rays.

公开(公告)号：JP2002006046A

公开(公告)日：2002-01-09

申请号：JP2000181804

申请日：2000-06-16

Applicant: ALOKA CO LTD

Inventor： TATEISHI NAOKI

IPC: G01T1/17 ,  G01T1/00 ,  G01T1/02

Abstract: PROBLEM TO BE SOLVED: To generate a prealarm before reaching an alarm level in a personal dosemeter which computes a dose rate and an integrated dose. SOLUTION: On the basis of the change tendency of a dose rate in the past, the change tendency of a dose rate in the future is obtained. On the basis of its estimation, a future change in the integrated dose is estimated. On the basis of an integrated dose alarm level 202, the generation condition of the prealarm is set. When, e.g. the estimated arrival time to the alarm level becomes a prescribed time, the prealarm is output. The estimated arrival time may be displayed on a display. Regarding the generation condition of the prealarm, various conditions can be set.