Personal dosimeter vibration resistance and electromagnetic radiation interference processing method
A technology of electromagnetic radiation and processing method, applied in the field of ionizing radiation testing, can solve the problem that external shock vibration and interference effects of electromagnetic radiation cannot be completely excluded.
Active Publication Date: 2017-07-18
四川中测辐射科技有限公司
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However, the above measures cannot completely rule out the interference effects of external shock vibration and electromagnetic radiation.
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[0026] The realization of the present invention is mainly to superimpose the reference voltage V on the reverse proportional amplifier link in the key components of the detection system composed of Si-PIN detector, charge sensitive preamplifier, reverse proportional amplifier and discriminator. ref , so that the output baseline waveform output signal value is at V ref fluctuate nearby. At the same time, a discriminator is added to the discriminator unit, the purpose of which is to form the capability of forward and reverse discrimination of the pulse signal. Combined with the microprocessor-based signal processing software platform to complete the separation and removal of nuclear signals, shock vibration, and electromagnetic radiation interference signals.
[0027] The output pulse waveform of the key components of the detector under the radioactive source condition has a single-level signal characteristic, and the pulse waveform data under the condition of external shock vi...
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The invention discloses a personal dosimeter vibration resistance and electromagnetic radiation interference processing method, and the method comprises the following steps: adjusting the positive reference voltage Vref of an inverting proportional amplifier of an inversing proportional amplifier unit at a central stage or a last stage in a detection system key part which consists of an Si-PIN detector, a charge sensitive pre-amplifier, inverting proportional amplifiers and a first discriminator, and enabling a baseline waveform output signal value of the detection system key part before the first discriminator to fluctuate nearby the Vref; adding a second discriminator besides the first discriminator, and carrying out the forwarding and reverse discrimination of the pulse waveform signal; completing the separation and removable of a nuclear signal impact vibration and an electromagnetic radiation interference signal through combining with a signal processing software platform based on a microprocessor. The method effectively removes the impact from the impact vibration and the electromagnetic radiation interference signal, and is especially effective for the removal of an instant interference signal in no-ray irradiation.
Description
technical field [0001] The invention relates to the technical field of ionizing radiation testing, in particular to a processing method for preventing vibration and electromagnetic radiation interference of a digital personal dosimeter. Background technique [0002] Digital personal dosimeters currently mainly use Si-PIN semiconductors as nuclear radiation detectors. Since the weak current signal that the ray interacts with the Si-PIN detector needs to be converted into a pulse signal that can be counted and processed, it needs to be processed by a charge-sensitive amplifier, an inverse proportional amplifier and a discriminator. [0003] Since the key components composed of Si-PIN detector and charge sensitive amplifier are easily disturbed by external shock vibration and electromagnetic radiation, an interference pulse signal different from normal nuclear signal will be generated at the output end. Electromagnetic interference sources mainly include radio stations, radar ...
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Login to View More IPC IPC(8): G01T1/02
CPCG01T1/02
Inventor 黄平熊秋锋杨润东刘操
Owner 四川中测辐射科技有限公司