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    Radiation measuring system and personal dosimeter
    31.
    发明专利
    Radiation measuring system and personal dosimeter 有权

    公开(公告)号：JP2004117372A

    公开(公告)日：2004-04-15

    申请号：JP2003386891

    申请日：2003-11-17

    Applicant: Aloka Co Ltd ,  アロカ株式会社

    Inventor： TATEISHI NAOKI

    IPC: G01T1/02 ,  G01T1/00 ,  G01T7/12

    Abstract: PROBLEM TO BE SOLVED: To properly control personal radiation exposure, to control personal exposure of an operator with no expert knowledge, and to make a commander determination properly on the side of an controlling apparatus. SOLUTION: The radiation measuring system comprises a plurality of personal dosimeters 10 and the controlling apparatus. The dosimeter 10 comprises a head unit 12 mounted on a helmet and a main body 14 attached to a breast pocket of an operator. The main body 14 is provided with a microcomputer 46 which calculates a dose rate and an integral dose. In accordance with a notification condition table, a proper notification condition according to the combination of each value of the dose rate and the integral dose is selected. Then, a message based on the notification condition is outputted from a speaker 70 through a voice synthesizing unit 68. The head unit 12 is provided with a position detector 72 and an imaging device 74. Measurement results, position information, and image information are transmitted to the controlling apparatus (not shown). COPYRIGHT: (C)2004,JPO

    SMEAR TYPE METHOD AND APPARATUS FOR MEASURING RADIATION
    33.
    发明专利
    SMEAR TYPE METHOD AND APPARATUS FOR MEASURING RADIATION 失效

    公开(公告)号：JP2001228251A

    公开(公告)日：2001-08-24

    申请号：JP2000042680

    申请日：2000-02-21

    Applicant: ALOKA CO LTD

    Inventor： TATEISHI NAOKI ,  HIRABAYASHI YUKIO

    IPC: G01T1/169 ,  G01T1/20 ,  G01T7/02

    Abstract: PROBLEM TO BE SOLVED: To enable α rays to be measured when a wrapped smear filter paper is measured. SOLUTION: A scintillator layer 12 of ZnS (Ag) or the like is set on a surface of a wrapping film 10 for covering a sample face 20a of the smear filter paper 20. The smear filter paper 20 is placed on an adhesive tape 14 with the sample face 20a turned upside. The wrapping film 10 with the face of the scintillator layer 12 set down is coated from above to wrap the smear filter paper 20. Since the scintillator layer 12 tightly adheres to a sample on the smear filter paper 20, a rays from the sample can be efficiently detected and converted to a light. Measuring a rays is thus enabled by detecting the wrapped smear type filter paper 20 by a photomultiplier tube or the like.

    RADIATION MEASURING DEVICE AND METHOD
    34.
    发明专利
    RADIATION MEASURING DEVICE AND METHOD 失效

    公开(公告)号：JP2000258538A

    公开(公告)日：2000-09-22

    申请号：JP6084399

    申请日：1999-03-08

    Applicant: NAT INST RADIOLOG ,  SHIBATA SADAO ,  ALOKA CO LTD

    Inventor： SHIBATA SADAO ,  TATEISHI NAOKI ,  AKIYAMA YUTAKA ,  MIZOGUCHI MAKI

    IPC: G01T1/00 ,  G01T1/167 ,  G01T1/17 ,  G01T1/178

    Abstract: PROBLEM TO BE SOLVED: To rapidly and accurately judge the fluctuation factor of dose by executing a specific standardization operation for the result of a differential operation and at the same time displaying the change in the standardization fluctuation rate with time. SOLUTION: A detector 10 continuously detects γ rays and the detection data is transmitted to a γ-ray spectrometer 12. The detection data being converted to a digital data is sent to a waveheight analysis part 18, waveheight is distinguished by the waveheight analysis part 18, at the same time a count value N is obtained for each energy (channel). An analysis result by the waveheight analysis part 18 is outputted to a standardization operation part 20. The operation result is sent to a graph creation part 22 and an alarm judgment part 23. The graph creation part 22 is a means for displaying a standardization fluctuation rate F being operated in a graph, The graph thus created is displayed on a display 24. An alarm judgment part 23 compares the standardization fluctuation rate F with a specific alarm judgment value K.

    RADIATION MEASURING DEVICE
    35.
    发明专利
    RADIATION MEASURING DEVICE 失效

    公开(公告)号：JPH10197644A

    公开(公告)日：1998-07-31

    申请号：JP517497

    申请日：1997-01-16

    Applicant: ALOKA CO LTD

    Inventor： TATEISHI NAOKI

    IPC: G01T1/16 ,  G01T1/17

    Abstract: PROBLEM TO BE SOLVED: To specify contaminated location in a survey meter efficiently without disturbed by background. SOLUTION: If a detection pulse 100 is detected with a wave-height discriminator 14, a pulse 102 having a specific width T is output from a one shot multivibrator 16. If another detection pulse 100 generates outside the width T, it is judged as background by AND circuits 18 and 20 and detection pulse other than the background is output as a measured result. Also only background can be output separately.

    ARITHMETIC METHOD FOR RADIATION COUNTING RATE
    36.
    发明专利
    ARITHMETIC METHOD FOR RADIATION COUNTING RATE 失效

    公开(公告)号：JPH085748A

    公开(公告)日：1996-01-12

    申请号：JP13285994

    申请日：1994-06-15

    Applicant: ALOKA CO LTD

    Inventor： TATEISHI NAOKI

    IPC: G01T1/18

    Abstract: PURPOSE:To determine a proper averaging time quickly by comparing the sums of counts between adjacent groups while addition elements within the group are increased by geometrical progression and instability is determined when the difference of the sums becomes large to adopt the stable period as averaging period (counting rate computation period). CONSTITUTION:The sum S1 of counts is computed to those at the (2K -1)th position (wherein K= 0, 1, 2...) retroactive from the current counts and then, the sum S2 of the counts to those at the(2K -1)th position from the counts at the 2Kth position. Then, the sums S1 and S2 of the counts are compared increasing K and the period when changes in the counts are stable is determined to be a stable period which is used as averaging time to calculate a counting rate. Here, a coefficient C is set and when ¦S1-S2¦

    RADIOACTIVE RAY MEASURING INSTRUMENT
    37.
    发明专利
    RADIOACTIVE RAY MEASURING INSTRUMENT 失效

    公开(公告)号：JPH07181265A

    公开(公告)日：1995-07-21

    申请号：JP32714593

    申请日：1993-12-24

    Applicant: ALOKA CO LTD

    Inventor： MATSUBARA SHOHEI ,  TATEISHI NAOKI ,  OSHIMA TOSHINORI

    IPC: G01T7/00 ,  G01D7/00

    Abstract: PURPOSE:To provide a radioactive ray measuring instrument which enables the stability of the radioactive ray value to be measured to be grasped easily and achieves an accurate measurement. CONSTITUTION:This instrument is provided with a detector 10 for detecting radioactive rays, an amplifier 12 for amplifying the radioactive ray signals from the detector 10, an A/D converter for converting the amplified radioactive ray signals to digital signals, a calculation circuit 14 of a count rate A according to a long time constant, a calculation circuit 16 of a count rate B according to a short time constant, a digital display part 18 for displaying a count rate in a specific time constant, and a fluctuation calculation circuit 20 for calculating the fluctuation in the count rate using different count rates output from two calculators, and a fluctuation display part 22 for displaying the fluctuation value of the count value based on the fluctuation calculation circuit 20 of the count rate. The fluctuation value is obtained by calculating the difference between the count rates A and B and by obtaining the ratio of the difference to the count rate A and the value is displayed at the fluctuation display part 22 as required.

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