X-ray pulsar photon signal ground simulation system with high time-frequency stability
A photon signal, ground simulation technology, applied in the field of signal processing, can solve the problems of low precision, low simulation reliability, limited machining precision, etc., and achieve the effect of ensuring time precision, strong system controllability, and guaranteeing amplitude precision.
A photon signal, ground simulation technology, applied in the field of signal processing, can solve the problems of low precision, low simulation reliability, limited machining precision, etc., and achieve the effect of ensuring time precision, strong system controllability, and guaranteeing amplitude precision.
CN102778236AActive Publication Date: 2012-11-14XIDIAN UNIV
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[0034] refer to figure 1 , the present invention has a high time-frequency stability X-ray pulsar photon signal ground simulation system, including a program-controlled computer 1, a high time-frequency stability signal source 2, an electronically controlled visible light source 3, an adjustable optical attenuator 4, and an optical shielding cavity 5. Photomultiplier tube 6 and electronic readout circuit 7 . in:
[0035] Photomultiplier tube 6, choose but not limited to PMTH-S1-R1527P type side window phototube, the spectral response range of this type of photomultiplier tube is between 185-680nm, the peak response wavelength is 400nm, and the typical dark number is 30 pieces / second;
[0036] The adjustable optical attenuator 4 is fixed on the side close to the photomultiplier tube 6 in the optical shielding cavity 5, and the optical shielding cavity 5 is tightly and hermetically connected to the side window of the photomultiplier tube cavity 6, and is optically sealed;
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The invention discloses an X-ray pulsar photon signal ground simulation system with high time-frequency stability, comprising a program control computer, a high time-frequency stability signal source, an electric control visible light source, an adjustable optical attenuator, an optical shielding cavity, a photomultiplier and an electronic reading circuit. The high time-frequency stability signal source is used for obtaining a pulsar cycle and outline data output by the program control computer, generating a trigger signal to synchronize the electronic reading circuit, generating a high time-frequency stability voltage, inputting the voltage to the electric control visible light source and controlling the electric control visible light source to generate the visible light with light power which is in direct proportion with the input voltage, wherein the visible light is attenuated into photon stream by the adjustable optical attenuator; the photomultiplier detects out that the photo stream generates electric pulse, calibrates the electric pulse by the electronic reading circuit and then outputs to the program control computer. The system has the advantages of high simulation reliability, high outline precision and high time precision and can be used as an experimental device for timing observation, weak signal treatment and navigation design.
Description
technical field [0001] The invention belongs to the technical field of signal processing, in particular to an X-ray pulsar photon signal ground simulation system, which simulates the X-ray pulsar photon signal received by a detector in a space environment, and can be used for timing observation, weak signal processing and navigation algorithm design important experimental device. Background technique [0002] A pulsar is a high-speed rotating, highly magnetized "extreme" celestial body with a short rotation period and high stability. These characteristics make it possible to use pulsars for navigation and timing in deep space. However, because pulsars are generally hundreds to hundreds of thousands of light years away from the earth, the X-ray pulse signal attenuation is relatively serious, and the flow is very weak when it reaches the X-ray detector. At the same time, due to the influence of cosmic rays and the performance of the detector itself, the The received signal is...
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Patent Timeline
14 Nov 2012
Publication
CN102778236A
- IPC
- G01C21/24; G04G7/00
- Inventors
- 李小平; 谢楷