CN203825414U - Nuclear pulse signal acquiring, storing, and replaying apparatus - Google Patents

Abstract

The utility model discloses a nuclear pulse signal acquiring, storing, and replaying apparatus characterized by comprising a detector and pre-amplification module, a main amplification circuit, a high-speed ADC module, a programmable logic device, a nonvolatile memory, and a digital-to-analogue converting module. The detector and pre-amplification module is connected with the main amplification circuit. The main amplification circuit is connected with the high-speed ADC module. The high-speed ADC module is connected with the programmable logic device. The programmable logic device is connected with the nonvolatile memory and the digital-to-analogue converting module. The nuclear pulse signal acquiring, storing, and replaying apparatus has advantages of facilitating field operation and maintenance; integrally designing the nonvolatile memory and the digital-to-analogue converting module; facilitating storage and replay of an original nuclear pulse signal; and achieving technical indexes of a high-speed ADC module sampling rate more than 20MHz, a data storage depth more than 2KByte, and corresponding digital-to-analogue converting module time less than 10[mu]s.

Description

Core pulse signal acquisition, storage, playback reproducer

Technical field

The utility model relates to Nuclear Instruments And Industrial Gauges, especially a kind of core pulse signal acquisition, storage, playback reproducer.

Background technology

Nuclear technology is the important component part of modern science and technology, is one of contemporary topmost sophisticated technology, one of sign of Ye Shi social modernization.Since natural radioactivity in 1896 is found, along with foundation, accelerator and the atomic pile of artificial radioactive discovery, models of nucleus successfully turns round and the examination of first atom bomb bursts into merit, nuclear technology has produced the unforeseeable tremendous influence of people to world politics, economy.First the development of state's Kernel Technology starts from the defence and military field of the mid-50 in last century, and then Nuclear Techniques is penetrated into the every field such as scientific research, medical science, agricultural, industry gradually.At present, there are in the world nearly 100 countries to carry out relevant research, the development and utilization of nuclear technology.Through the development of more than 100 years, nuclear technology industry obtained day by day significantly economic benefit.Within 2010, statistics shows, the annual value of production of global nuclear technology industry is over 8,000 hundred million dollars.

Along with the development of nuclear technology, the research of Nuclear Instruments And Industrial Gauges is also subject to people always and pays close attention to widely.In Nuclear Instruments And Industrial Gauges research process, the development of hardware system is absolutely necessary.Development hardware system generally includes 4 steps such as design, making, test and optimization.Wherein, testing procedure is mainly the correctness of verification system design, and finds Shortcomings in designing and making, is also that the improvement and optimization of follow-up system proposes thinking simultaneously.Conventionally testing procedure comprises 2 aspects: (1) adopt standard signal (exponential damping signal) to carry out system testing; (2) adopt actual signal (parent signal) to carry out system testing.Consider the practicality requirement that development Nuclear Instruments And Industrial Gauges solves Practical Project problem, it is more outstanding that the correctness of actual signal test result seems.At present in traditional method, actual signal often for example, is directly produced by radioactive nuclide (137Cs, 55Fe, 241Am etc.).And use radioactive nuclide to produce the restriction that nuclear signal exists 2 aspects such as qualification license and safety management.Even if possess production unit and the colleges and universities institutes of radioactive nuclide qualification license, radioactive nuclide daily deposit, borrow, also etc. management system aspect is also quite loaded down with trivial details.In addition, using the hardware system of radioactive nuclide test Nuclear Instruments And Industrial Gauges is also to have no small harm to operating personnel self health.In view of the huge market potential of domestic Nuclear Instruments And Industrial Gauges industry and good application prospect, develop a kind of nuclear signal collecting safe and reliable, easy to use, storage, playback reproducer and seem very urgent.

Summary of the invention

The purpose of this utility model is to provide a kind of core pulse signal acquisition, storage, playback reproducer, this device is for the application requirements of hardware system test in current Nuclear Instruments And Industrial Gauges research field, detector and pre-amplifying module, main amplifying circuit, high-speed ADC module, nonvolatile memory, D/A converter module and programmable logic device (PLD) are adopted to integrated design, form a system ensemble that can complete core pulse signal acquisition, storage, playback, there is the advantages such as simple in structure, cheap, use is safe, easy to operate.

The technical solution of the utility model is: a kind of core pulse signal acquisition, storage, playback reproducer, and this device comprises detector and pre-amplifying module, main amplifying circuit, high-speed ADC module, programmable logic device (PLD), nonvolatile memory and D/A converter module; The radiating particle that described detector and pre-amplifying module are collected radionuclide decay is converted to electric impulse signal; Described detector is connected with main amplifying circuit with pre-amplifying module; Described main amplifying circuit amplifies the signal of detector and pre-amplifying module output; Described main amplifying circuit is connected with high-speed ADC module; Described high-speed ADC module is carried out analog to digital conversion by main amplifying circuit output signal; Described high-speed ADC module is connected with programmable logic device (PLD); Described programmable logic device (PLD) completes to be controlled the interface of high-speed ADC module; Described programmable logic device (PLD) is connected with D/A converter module respectively at nonvolatile memory; Described nonvolatile memory is for the transformation result of storing high-speed ADC module; Described D/A converter module is for the actual core pulse signal of playback.Adopt detector and the pre-amplifying module of 3 types to gather respectively α, γ and x etc. 3 types of radiating particles.Adopt the actual core pulse signal after nonvolatile memory storage digitizing.Adopt the actual core pulse signal of D/A converter module playback.

The utility model has the advantage of: in structural design, adopt integrated design scheme, facilitate execute-in-place and maintenance; On system, adopt high-speed ADC module image data, carry out integrated design with nonvolatile memory and D/A converter module simultaneously; On Functional Design, when completing parent signal Real-time Collection, non-volatile memories and signal playback function are integrated in system, convenient to realizing storage and the playback of parent signal; In technical indicator, high-speed ADC module acquisition rate > 20MHz, data storage depth > 2K Byte, the corresponding time < 10 μ s of D/A converter module.

Accompanying drawing explanation

Fig. 1 is the utility model core pulse signal acquisition, storage, playback reproducer catenation principle figure.

Embodiment

Below in conjunction with accompanying drawing, the utility model is further described:

As shown in FIG., a kind of core pulse signal acquisition, storage, playback reproducer, comprise detector and pre-amplifying module, main amplifying circuit, high-speed ADC module, programmable logic device (PLD), nonvolatile memory and D/A converter module.The radiating particle that described detector and pre-amplifying module are collected radionuclide decay is converted to electric impulse signal; Described detector is connected with main amplifying circuit with pre-amplifying module; Described main amplifying circuit amplifies the signal of detector and pre-amplifying module output; Described main amplifying circuit is connected with high-speed ADC module; Described high-speed ADC module is carried out analog to digital conversion by main amplifying circuit output signal; Described high-speed ADC module is connected with programmable logic device (PLD); Described programmable logic device (PLD) completes to be controlled the interface of high-speed ADC module; Described programmable logic device (PLD) is connected with D/A converter module respectively at nonvolatile memory; Described nonvolatile memory is for the transformation result of storing high-speed ADC module; Described D/A converter module is for the actual core pulse signal of playback.

The use of device is divided into 2 steps.The first step, first (for example will commonly use radioactive nuclide ¹³⁷cs, ⁵⁵fe, ²⁴¹am etc.) original signal collection, be stored in nonvolatile memory.First, the radiating particle of radionuclide decay is detected device and pre-amplifying module obtains, and is converted to electric impulse signal; Secondly, the electric impulse signal of detector and pre-amplifying module output carries out amplitude amplification by main amplifying circuit, reaches the requirement that subsequent conditioning circuit is processed; Then, the electric impulse signal after amplification is digital signal by high-speed ADC module converts; Finally, this digital signal is saved in the middle of nonvolatile memory.Second step, by the direct playback of the original signal of storing in nonvolatile memory, restores original signal.By programmable logic device (PLD), directly control nonvolatile memory output digit signals and D/A converter module startup conversion.If needing the original signal of renewal or interpolation radioactive nuclide carries out according to the first step.

Although described by reference to the accompanying drawings embodiment of the present utility model, the protection domain that those of ordinary skills do not need various distortion that creativity work just can make or modification still to belong to this patent within the scope of the appended claims.

Claims (2)

1. core pulse signal acquisition, storage, a playback reproducer, is characterized in that: this device comprises detector and pre-amplifying module, main amplifying circuit, high-speed ADC module, programmable logic device (PLD), nonvolatile memory and D/A converter module; Described detector is connected with main amplifying circuit with pre-amplifying module, described main amplifying circuit is connected with high-speed ADC module, described high-speed ADC module is connected with programmable logic device (PLD), and described programmable logic device (PLD) is connected with D/A converter module respectively at nonvolatile memory.

2. core pulse signal acquisition according to claim 1, storage, playback reproducer, is characterized in that: adopt detector and the pre-amplifying module of 3 types to gather respectively radiating particle.