CN2314367Y

CN2314367Y - Portable automatic radon monitor

Info

Publication number: CN2314367Y
Application number: CN 97240515
Authority: CN
Inventors: 陈志恒; 杨德荣
Original assignee: YINGCHENG ELECTRONIC FACTORY SHIYAN TOWN BAOAN COUNTY
Current assignee: YINGCHENG ELECTRONIC FACTORY SHIYAN TOWN BAOAN COUNTY
Priority date: 1997-08-11
Filing date: 1997-08-11
Publication date: 1999-04-14
Anticipated expiration: 2007-08-11

Abstract

The utility model relates to a portable automatic radon monitor used for monitoring radioactive gas radon, comprising a detecting chamber 1, a semiconductor detector 2, an air pump 3, a filter 4, an air inlet 5, an air outlet 6, an alpha spectrometer 7 and an electronic device 8. The utility model has the gist that the detecting chamber 1 is composed of two collector electrodes; one collector electrode is an electric conduction chamber 11, and the other collector electrode is the semiconductor detector 2; an insulating layer 9 is arranged between the collector electrodes. The utility model realizes the automatic, continuous and rapid measurement of the radon, and causes the measuring process to be intelligent. The utility model has the advantages of small size, light weight, portability, etc.

Description

Portable radon automonitor

The utility model relates to a kind of radgas monitoring device, particularly relates to a kind of automated watch-keeping facility of radgas-radon.

Radon is the radgas of being emitted by the decay of the radium element in the uranium radioactive mineral that extensively distributes on earth, it is by the ground of buildings, building materials, channels such as water make a large amount of radon of accumulation in the people room, health to people causes great harm, it is again the tracer agent of a kind of crustal structure and variation thereof simultaneously, the measurement of radon is widely used in geologic structure, geological prospecting, water detection, aspect such as oil prospecting and earthquake prediction, and environment and indoor radon concentration have confidential relation with geologic condition, therefore, people press for a kind of can measurement environment in radon concentration energy measurement soil again, the instrument of water (comprising radium in the water) the radon degree of depth, and existing emanometer all can not both be taken into account.Simultaneously, in requiring higher measurement, all there are certain deficiency in existing measuring method and device, and they or measuring speed and sensitivity are not high, as the electrometer method of classics, ZnS scintigraphy; Perhaps highly sensitive, but operation can not robotization and device heavy, as balloon method, two filter membrane methods.The prior defective of existing method and apparatus is their first short-life decay daughter RaA of energy measurement radon not, does not therefore accomplish rapid reaction radon concentration change and measures continuously and automatically veritably.

The purpose of this utility model is to provide a kind of energy rapid reaction radon concentration change, and the energy continuous automatic measurement is highly sensitive, installs light portable radon automonitor.

The purpose of this utility model realizes as follows:

The utility model comprises detecting chamber 1, semiconductor detector 2, air pump 3, filtrator 4, air intake opening 5, gas outlet 6, alpha spectrometer 7 and electronic installation 8, its main points are that detecting chamber 1 is made of two passive electrodes, a passive electrode is conduction chamber 11, another passive electrode is that semiconductor detector 2 is own, and an insulation course 9 is arranged between two passive electrodes.

Described conduction chamber 11 is a hollow semisphere or cylindrical, scribbles layer of conductive material 111 in semisphere or cylindrical housings inside surface, and some is not coated with conductive material formation insulation course 9 between semiconductor detector 2 and insulation shell.

Described semiconductor detector 2, air pump 3, filtrator 4, air intake opening 5, gas outlet 6, alpha spectrometer 7 and electronic installation 8 all are contained between conduction chamber upper baffle plate 12 and the panel 13.

Principle of work of the present utility model as shown in Figure 1, it can realize instantaneous sample static measurement or continuously dynamically sampling, kinetic measurement dual mode continuously.Under air pump 3 high negative pressure effects, contain the radon gas body and enter in the detecting chamber 1 through filter 4 and air intake opening 5.Because semisphere passive electrode 11 is anodal, it is negative pole that semiconductor is surveyed body 2, and the nascent state radon daughter has positive charge, therefore under electric field action, radon daughter just is collected on semiconductor detector 2 electrodes, the α particle that radon daughter is emitted is detected by semiconductor detector, after amplifying, amplifier delivers to alpha spectrometer, the α particle of emitting by its first short life daughter RaA that measures radon, the counting that records is controlled and is handled by microcomputer, and shows counting and and the radon concentration that records on display.The gas that enters detecting chamber through collecting and sampling after air pump 3 and gas outlet 6 discharge outside the instruments.

Because the utility model adopts semiconductor to survey body and makes a passive electrode, on the sensitive volume of semiconductor detector, form the radon daughter radioactive source on ultra-thin bright and clean plane, thereby created essential condition for first short life daughter RaA that adopts the α spectrometry to measure radon.Measured data are carried out control and treatment by microcomputer, thereby have fundamentally removed manual operations, have realized continuously, automatically, measure fast, and have made the measuring process intellectuality.Characteristics such as that the utility model also has is small-sized, light, be easy to carry about with one.

Fig. 1 is a structural representation of the present utility model.

Fig. 2 is the utility model schematic perspective view.

Provide embodiment of the present utility model below in conjunction with accompanying drawing.

As shown in Figure 1, the utility model is provided with detecting chamber 1, it is made of two passive electrodes, a passive electrode is conduction chamber 11, another passive electrode is that semiconductor detector 2 is own, conduction chamber 11 is the positive pole of passive electrode, and it is hemispherical that it is shaped as hollow, scribbles one deck graphite 111 at semisphere plastic casing inside surface and make electric conductor.Semiconductor detector 2 surface gold-plating, the negative pole of formation passive electrode, the positively charged radon daughter that enters conduction chamber 11 is injected in the Gold plated Layer on semiconductor detector 2 surfaces under electric field action, and is that semiconductor detector is collected.Be not coated with conductive material on some plastic casing between two passive electrodes, forming insulation course 9.As shown in Figure 2, between conduction chamber 11 upper baffle plates 12 and panel 13, semiconductor detector 2 is housed, low-power, low noise and the air pump 3 of high negative pressure, be used to filter the net type filter 4 that sucks gas, the air intake opening 5 that links to each other with filtrator, gas outlet 6 is used to measure the alpha spectrometer 7 and the electronic installation 8 of α particle of first short life daughter of radon.Described electronic installation 8 adopts prior art, and it comprises amplifier 81, high-voltage power supply 82, direct supply 83 and microcomputer and printer (not shown).The electric signal of measured radon daughter is delivered to alpha spectrometer after amplifier amplifies, the α particle of emitting by its first short life daughter RaA that measures radon, the counting that records is controlled and is handled by microcomputer, and on display, show the counting record and and radon concentration, link to each other with general purpose PC by RS-232 interface at last, show and print result.

Claims

1, a kind of portable radon automonitor, comprise detecting chamber (1), semiconductor detector (2), air pump (3), filtrator (4), air intake opening (5), gas outlet (6), alpha spectrometer (7) and electronic installation (8), it is characterized in that detecting chamber (1) is made of two passive electrodes, a passive electrode is conduction chamber (11), another passive electrode is a semiconductor detector (2) itself, and an insulation course (9) is arranged between two passive electrodes.

2, portable radon automonitor according to claim 1, it is characterized in that conducting electricity chamber (11) is hollow semisphere or cylindrical, scribble layer of conductive material (111) in semisphere or cylindrical insulation shell inside surface, some is not coated with conductive material formation insulation course (9) between semiconductor detector (2) and insulation shell.

3, portable radon automonitor according to claim 1 is characterized in that semiconductor detector (2), air pump (3), filtrator (4), air intake opening (5), gas outlet (6), alpha spectrometer (7) and electronic installation (8) all are contained between conduction chamber (11) upper baffle plate (12) and the panel (13).