Low Power Micro Analog Multichannel

With the rapid development of China’s economy and society, the contradiction between energy shortage and environmental deterioration has become increasingly prominent. As a clean energy, the nuclear power industry has ushered in an unprecedented development opportunity. More and more attention has been paid to the issue of nuclear radiation safety protection. The acquisition and processing of nuclear signals becomes more and more important. As a common research means, the acquisition and processing of nuclear information plays an important role in many basic and applied scientific research. Nuclear energy spectrum measurement system has the advantages of high sensitivity, good accuracy and non-destructive, and is widely used in particle physics, material science and nuclear radiation environment monitoring. The content, position and time of elements in the nuclear radiation field can be obtained by energy spectrum analysis, which needs to be captured by the nuclear radiation detector. A multi-channel pulse amplitude analyzer (energy spectrometer) is used to extract useful nuclear radiation information from the output signal of the detector, so as to obtain information on the energy, category and radiation intensity of the input radiation. With the demand of field analysis and the development of miniaturization of electronic technology, the demand for portable instruments or handheld instruments is more and more obvious, and there are more and more field analysis instruments. At present, all on-site nuclear measurement instruments are developing in the direction of small size, light weight, low background, low power consumption, high performance, and fast analysis speed. Therefore, this paper chooses the low-power ARM chip as the microprocessor, and designs a low-power micro multichannel circuit with programmable amplifier, CR-RC circuit, peak holder and other circuits. The size of circuit board is 20 mm × 46 mm. The multi-channel power consumption is between 200 mW and 250 mW. In addition, corresponding probes and corresponding communication methods can be installed in intelligent robots, UAVs and places where measurement cannot be realized manually. It can also be integrated into various equipment and instruments to achieve nuclear signal acquisition and processing and energy spectrum analysis. In this paper, a low-power micro analog multi-channel is designed and implemented. The detector collects the radiation and obtains the signal amplitude information, so as to carry out nuclide identification and further dose quantitative analysis. It is of great significance for nuclear radiation safety protection.