阅读说明：本技术 一种Cs-138连续监测装置及检测方法 (Cs-138 continuous monitoring device and detection method ) 是由 沈辐 张贞 于 2021-08-24 设计创作，主要内容包括：本发明公开了一种Cs-138连续监测装置及检测方法,包括箱体,所述箱体的内壁固定连接有上卡箱,所述箱体的内壁滑动连接有下卡箱,所述箱体的一侧内壁转动连接有第三转轴和第一转轴,所述第一转轴和第三转轴传动连接,所述第一转轴的外壁固定套设有送纸辊,所述第三转轴的外壁固定套设有卷纸辊,所述箱体的内壁固定连接有对称设置的两个固定杆,本发明结构简单,通过驱动组件带动第一转轴和第三转轴转动,进而利用一个伺服电机便可以完成对下卡箱的下移以及第一转轴和第二转轴的转动,降低成本,毛刷将滤网表面的灰尘刷下,避免滤网堵塞,干燥箱内部空气的水分会附着在加热管上,使用方便。(The invention discloses a Cs-138 continuous monitoring device and a detection method, which comprises a box body, wherein the inner wall of the box body is fixedly connected with an upper clamping box, the inner wall of the box body is connected with a lower clamping box in a sliding manner, the inner wall of one side of the box body is rotatably connected with a third rotating shaft and a first rotating shaft, the first rotating shaft and the third rotating shaft are in transmission connection, the outer wall of the first rotating shaft is fixedly sleeved with a paper feeding roller, the outer wall of the third rotating shaft is fixedly sleeved with a paper winding roller, and the inner wall of the box body is fixedly connected with two symmetrically arranged fixing rods. Is convenient to use.)

1. The utility model provides a Cs-138 continuous monitoring device, includes box (1), its characterized in that, inner wall fixedly connected with of box (1) goes up card case (2), the inner wall sliding connection of box (1) has lower card case (16), one side inner wall of box (1) rotates and is connected with third pivot (18) and first pivot (6), first pivot (6) and third pivot (18) transmission are connected, the outer wall fixed cover of first pivot (6) is equipped with paper feed roller (7), the outer wall fixed cover of third pivot (18) is equipped with paper winding roller (19), the inner wall fixedly connected with of box (1) symmetrically sets up two dead levers (21), the outer wall of paper winding roller (19), paper feed roller (7) and two dead levers (21) is around being equipped with same strip and strains paper tape (20), draw-in groove (25) have all been seted up down to the top both sides of lower card case (16), the improved filter paper box is characterized in that upper clamping grooves (24) are formed in two sides of the bottom of the upper clamping box (2), the upper clamping grooves (24) and the lower clamping grooves (25) are matched with filter paper tapes (20) for use, a fan (26) is arranged inside the lower clamping box (16), an air outlet pipe (15) communicated with each other is fixedly connected to the bottom of the lower clamping box (16), one end of the air outlet pipe (15) extends to the outside of the box body (1), a gamma energy spectrum detector (27) is arranged inside the upper clamping box (2), a first air inlet pipe (3) communicated with each other is fixedly connected to the top of the upper clamping box (2), a drying box (4) is fixedly connected to the inner wall of the top of the box body (1), one side of the drying box (4) is communicated with one end of the first air inlet pipe (3), a second air inlet pipe (5) communicated with each other is fixedly connected to one side, far away from the first air inlet pipe (3), of the drying box (4), one end of the second air inlet pipe (5) extends to the outside of the box body (1), and a driving assembly used for driving the first rotating shaft (6) and the third rotating shaft (18) to rotate is arranged on one side of the box body (1).

2. The Cs-138 continuous monitoring device of claim 1, wherein the driving assembly comprises a driving box (35) fixedly connected to one side of the box body (1), a servo motor (36) is fixedly connected to the inner wall of one side of the driving box (35), an output shaft of the servo motor (36) penetrates through the box body (1) and is fixedly connected with a second rotating shaft (10), one end of the second rotating shaft (10) is fixedly connected with an incomplete gear (9), and a spur gear (8) meshed with the incomplete gear (9) is fixedly sleeved on the outer wall of the first rotating shaft (6).

3. The Cs-138 continuous monitoring device of claim 1, wherein a first synchronous wheel (22) is fixedly sleeved on the outer wall of the first rotating shaft (6), a second synchronous wheel (23) is fixedly sleeved on the outer wall of the third rotating shaft (18), and the same synchronous belt (17) is sleeved on the outer wall of the first synchronous wheel (22) and the outer wall of the second synchronous wheel (23).

4. The Cs-138 continuous monitoring device according to claim 1, wherein a heating pipe (30) is fixedly connected to the inner wall of the top of the drying box (4), and a heating wire (31) is arranged inside the heating pipe (30).

5. The Cs-138 continuous monitoring device according to claim 1, wherein a filter screen (32) is fixedly connected to the inside of the drying box (4), a fixing plate (34) is fixedly connected to the inner wall of one side, away from the filter screen (32), of the drying box (4), a plurality of through holes (33) are formed in the fixing plate (34), an electric push rod (37) is fixedly connected to the inner wall of the top of the drying box (4), a brush (38) is fixedly connected to the bottom of the electric push rod (37), and the brush (38) is abutted to one side of the filter screen (32).

6. The continuous Cs-138 monitoring device of claim 1, wherein four positioning slots (28) are formed in the bottom of the upper clamping box (2) in a pairwise symmetry manner, four positioning blocks (29) are formed in the top of the lower clamping box (16) in a pairwise symmetry manner, and the positioning slots (28) are clamped with the positioning blocks (29).

7. The Cs-138 continuous monitoring device of claim 1, wherein a vertical plate (14) is fixedly connected to the bottom of the lower clamping box (16), gear teeth (11) are fixedly connected to one side of the vertical plate (14), a mounting plate (12) is fixedly connected to the inner wall of one side of the box body (1), and the same spring (13) is fixedly connected between the top of the mounting plate (12) and the bottom of the vertical plate (14).

8. The method of any one of claims 1-7, wherein the method comprises the steps of:

s1, starting a fan (26), sucking air outside the box body (1) into the upper clamping box (2) through a second air inlet pipe (5), a drying box (4) and a first air inlet pipe (3) by the fan (26) in sequence, filtering the air by a filtering paper tape (20), reserving Cs-138 in the air on the upper surface of the filtering paper tape (20), discharging the filtered air through an air outlet pipe (15), monitoring the Cs-138 on the surface of the filtering paper tape (20) in real time through a gamma energy spectrum detector (27), measuring a radiation spectrum, extracting CS-138 full-energy peak information obtained by sampling from the radiation spectrum by adopting a Cs-138 concentration measuring method, and calculating the concentration of the CS-138 in the air by combining sampling and measuring time;

s2, the filter screen (32) can filter out larger dust, the monitoring of Cs-138 is prevented from being affected subsequently, the electric heating wire (31) and the electric push rod (37) are started simultaneously, the electric push rod (37) drives the brush (38) to reciprocate in the vertical direction, the brush (38) brushes down the dust on the surface of the filter screen (32), the filter screen (32) is prevented from being blocked, the electric heating wire (31) heats the air inside the heating pipe (30), when the air outside the box body (1) enters the drying box (4) through the second air inlet pipe (5), the moisture of the air inside the drying box (4) can be attached to the heating pipe (30) and drips below the fixing plate (34) through the through hole (33), the dust is wetted, and the dust is prevented from floating and affecting air inlet;

s3, starting a servo motor (36), wherein an output shaft of the servo motor (36) drives a second rotating shaft (10) to rotate, the second rotating shaft (10) drives an incomplete gear (9) to rotate, the incomplete gear (9) drives a vertical plate (14) to vertically move downwards, the vertical plate (14) drives a lower clamping box (16) to vertically move downwards and extrude a spring (13), the lower clamping box (16) drives a positioning block (29) to vertically move downwards, the clamping state of the positioning block (29) and a positioning groove (28) is further relieved, and meanwhile, the incomplete gear (9) and a gear tooth (11) are not meshed any more;

s4, the lower card box (16) starts to move vertically upwards under the action of the elastic force of the spring (13), at the moment, the incomplete gear (9) drives the spur gear (8) to rotate, the spur gear (8) drives the first rotating shaft (6) to rotate, the first rotating shaft (6) drives the paper feeding roller (7) and the first synchronizing wheel (22) to rotate, the paper feeding roller (7) starts to convey the filter paper tape (20) forwards, the first synchronizing wheel (22) drives the synchronizing belt (17) to rotate, the synchronizing belt (17) drives the second synchronizing wheel (23) to rotate, the second synchronizing wheel (23) drives the third rotating shaft (18) to rotate, the third rotating shaft (18) drives the winding roller (19) to rotate, the winding roller (19) starts to collect the filter paper tape (20), so that the filter paper tape (20) can move forwards for a certain distance, and at the moment, because the upper card box (2) is separated from the lower card box (16), the suction force of the fan (26) cannot be too large, when the lower clamping box (16) vertically moves upwards under the action of the elastic force of the spring (13) and the positioning block (29) is clamped with the positioning groove (28) again, the suction force of the fan (26) is increased again, the filter paper tape (20) is clamped by the upper clamping groove (24) and the lower clamping groove (25), no wrinkle occurs, the filtering effect of the filter paper tape (20) is ensured, and the continuous monitoring of Cs-138 in the air can be realized by the cyclic reciprocation.

9. The method according to claim 8, wherein the Cs-138 concentration measurement method of step S1 is expressed by the following formula:

wherein the Chinese formula is 8.0612 multiplied by 10⁵、2.8392×10²、1.1781、3.3386×10²When the actual computer is used, a certain difference can be generated, the optimal error is controlled within 15 percent, and the moving time of the detection effective area is t_s，t_dFor time measurement, the effective net count of CS-138 is N_iThe detection efficiency is epsilon, and the sampling amount in the period is F_q。

10. The method of claim 9, wherein said t is a function of time_dThe time is less than 15min, t_sLess than 15 min.

Technical Field

The invention relates to the technical field of air monitoring, in particular to a Cs-138 continuous monitoring device and a detection method.

Background

Air is a mixture of gases in the earth's atmosphere, and thus is a mixture of mainly nitrogen, oxygen, noble gases (helium, neon, argon, krypton, xenon, radon), carbon dioxide, and other substances (e.g., water vapor, impurities, etc.). Wherein the volume fraction of nitrogen is about 78%, the volume fraction of oxygen is about 21%, the volume fraction of noble gases (helium, neon, argon, krypton, xenon, radon) is about 0.934%, the volume fraction of carbon dioxide is about 0.04% (2017 data), and the volume fraction of other substances (e.g., water vapor, impurities, etc.) is about 0.002%. The composition of the air is not fixed, and the composition ratio of the air changes along with the change of the height and the change of the air pressure. However, air has been considered as a single substance for a long time, until a french scientist Lawa Sn firstly finds out through experiments that the air is composed of oxygen and nitrogen, and at the end of 19 th century, the scientists find out through a large number of experiments that the air also contains rare gases such as helium, argon, xenon and the like.

With the continuous development of the application of radioactive medicine and nuclear technology, the CS-138 has wide application, however, at present, no continuous monitoring method and device for the CS-138 in the air exist, and it is difficult to know whether the content of the CS-138 in the air is harmful to the human body at present, so that a continuous monitoring device and a detection method for the Cs-138 are provided to solve the above mentioned problems.

Disclosure of Invention

The invention aims to solve the defects in the prior art and provides a Cs-138 continuous monitoring device and a detection method.

In order to achieve the purpose, the invention adopts the following technical scheme:

a Cs-138 continuous monitoring device comprises a box body, wherein an upper clamping box is fixedly connected to the inner wall of the box body, a lower clamping box is slidably connected to the inner wall of the box body, a third rotating shaft and a first rotating shaft are rotatably connected to the inner wall of one side of the box body, the first rotating shaft and the third rotating shaft are in transmission connection, a paper feeding roller is fixedly sleeved on the outer wall of the first rotating shaft, a paper winding roller is fixedly sleeved on the outer wall of the third rotating shaft, two symmetrically-arranged fixing rods are fixedly connected to the inner wall of the box body, the paper winding roller, the paper feeding roller and the outer walls of the two fixing rods are wound with a same filter paper tape, lower clamping grooves are respectively formed in two sides of the top of the lower clamping box, upper clamping grooves are respectively formed in two sides of the bottom of the upper clamping box, the upper clamping grooves and the lower clamping grooves are respectively matched with the filter paper tape for use, a fan is arranged in the lower clamping box, and an air outlet pipe communicated with the bottom of the lower clamping box is fixedly connected with the lower clamping box, the one end of outlet duct extends to the outside of box, the inside of going up the card case is provided with gamma energy spectrum detector, the first intake pipe that the top fixedly connected with of going up the card case is linked together, the top inner wall fixedly connected with drying cabinet of box, one side of drying cabinet is linked together with the one end of first intake pipe, the second intake pipe that one side fixedly connected with of first intake pipe is linked together is kept away from to the drying cabinet, the one end of second intake pipe extends to the outside of box, one side of box is provided with and is used for driving first pivot and third pivot pivoted drive assembly.

Preferably, drive assembly includes the drive box of fixed connection in box one side, one side inner wall fixedly connected with servo motor of drive box, servo motor's output shaft runs through box and fixedly connected with second pivot, the one end fixedly connected with incomplete gear of second pivot, the outer wall fixed cover of first pivot is equipped with the spur gear with incomplete gear looks meshing.

Preferably, the outer wall fixing sleeve of the first rotating shaft is provided with a first synchronizing wheel, the outer wall fixing sleeve of the third rotating shaft is provided with a second synchronizing wheel, and the outer wall transmission sleeves of the first synchronizing wheel and the second synchronizing wheel are provided with the same synchronizing belt.

Preferably, the inner wall of the top of the drying box is fixedly connected with a heating pipe, and an electric heating wire is arranged inside the heating pipe.

Preferably, the inside fixedly connected with filter screen of drying cabinet, the one side inner wall fixedly connected with fixed plate of filter screen is kept away from to the drying cabinet, a plurality of through-holes have been seted up to the inside of fixed plate, the top inner wall fixedly connected with electric putter of drying cabinet, electric putter's bottom fixedly connected with brush, the brush is inconsistent with one side of filter screen.

Preferably, four positioning grooves which are symmetrical in pairs are formed in the bottom of the upper clamping box, four positioning blocks which are symmetrical in pairs are formed in the top of the lower clamping box, and the positioning grooves are clamped with the positioning blocks.

Preferably, the bottom fixedly connected with riser of lower calorie of case, one side fixedly connected with teeth of a cogwheel of riser, one side inner wall fixedly connected with mounting panel of box, the same spring of fixedly connected with between the top of mounting panel and the bottom of riser.

The continuous monitoring method of the Cs-138 comprises the following steps:

s1, starting a fan, sucking air outside the box body into the upper clamping box through a second air inlet pipe, the drying box and the first air inlet pipe in sequence by the fan, filtering the air by the filter paper tape, reserving Cs-138 in the air on the upper surface of the filter paper tape, discharging the filtered air through an air outlet pipe, monitoring the Cs-138 on the surface of the filter paper tape in real time through a gamma energy spectrum detector, measuring a radiation spectrum, extracting CS-138 full energy peak information obtained by sampling from the radiation spectrum by adopting a Cs-138 concentration measurement method, and calculating the concentration of CS-138 in the air by combining sampling and measuring time;

s2, the filter screen can filter out larger dust, the monitoring of Cs-138 is prevented from being affected subsequently, the electric heating wire and the electric push rod are started simultaneously, the electric push rod drives the brush to reciprocate in the vertical direction, the brush brushes down the dust on the surface of the filter screen, the filter screen is prevented from being blocked, the electric heating wire heats air inside the heating pipe, when air outside the box body enters the drying box through the second air inlet pipe, moisture of the air inside the drying box can be attached to the heating pipe, and can drip to the lower side of the fixing plate through the through hole, the dust is wetted, and the dust is prevented from floating and affecting air inlet;

s3, starting a servo motor, driving a second rotating shaft to rotate by an output shaft of the servo motor, driving an incomplete gear to rotate by the second rotating shaft, driving a vertical plate to vertically move downwards by the incomplete gear, driving a lower clamping box to vertically move downwards by the vertical plate and extrude a spring, driving a positioning block to vertically move downwards by the lower clamping box, further releasing the clamping state of the positioning block and a positioning groove, and simultaneously preventing the incomplete gear from being meshed with gear teeth;

s4, the lower clamping box starts to move vertically upwards under the action of the elastic force of the spring, at the moment, the incomplete gear drives the spur gear to rotate, the spur gear drives the first rotating shaft to rotate, the first rotating shaft drives the paper feeding roller and the first synchronous wheel to rotate, the paper feeding roller starts to convey the filter paper tape forwards, the first synchronous wheel drives the synchronous belt to rotate, the synchronous belt drives the second synchronous wheel to rotate, the second synchronous wheel drives the third rotating shaft to rotate, the third rotating shaft drives the paper winding roller to rotate, the paper winding roller starts to collect the filter paper tape, so that the filter paper tape can move forwards for a certain distance, at the moment, because the upper clamping box is separated from the lower clamping box, the suction force of the fan is not too large, when the lower clamping box moves vertically upwards under the action of the elastic force of the spring and the positioning block is clamped with the positioning groove again, the filter paper tape is also clamped by the upper clamping groove and the lower clamping groove, no wrinkles occur, and the filtering effect of the filter paper tape is ensured, the circulation can realize continuous monitoring of the Cs-138 in the air.

Preferably, the formula of the Cs-138 concentration measuring method in step S1 is:

wherein the Chinese formula is 8.0612 multiplied by 10⁵、2.8392×10²、1.1781、3.3386×10²When the actual computer is used, a certain difference can be generated, the optimal error is controlled within 15 percent, and the moving time of the detection effective area is t_s，t_dFor time measurement, the effective net count of CS-138 is N_iThe detection efficiency is epsilon, and the sampling amount in the period is F_q。

Preferably, said t_dThe time is less than 15min, t_sLess than 15 min.

Compared with the prior art, the invention has the beneficial effects that:

1. in the invention, a fan is started, the fan sucks air outside a box body into an upper clamping box through a second air inlet pipe, a drying box and a first air inlet pipe in sequence, Cs-138 in the air is retained on the upper surface of a filter paper tape after the filter paper tape is filtered, the filtered air is discharged through an air outlet pipe, the Cs-138 on the surface of the filter paper tape is monitored in real time through a gamma energy spectrum detector, a radiation spectrum is measured, CS-138 full-energy peak information obtained by sampling is extracted from the radiation spectrum by adopting a Cs-138 concentration measurement method, and the concentration of CS-138 in the air is calculated by combining sampling and measuring time;

2. according to the invention, the filter screen can filter out larger dust, so that the subsequent influence on the monitoring of Cs-138 is avoided, the electric heating wire and the electric push rod are started at the same time, the electric push rod drives the brush to reciprocate in the vertical direction, the brush brushes down the dust on the surface of the filter screen to avoid the blockage of the filter screen, the electric heating wire heats the air in the heating pipe, when the air outside the box body enters the drying box through the second air inlet pipe, the moisture in the air inside the drying box can be attached to the heating pipe and drops to the lower part of the fixing plate through the through hole, the dust is wetted, and the influence on air inlet due to the floating of the dust is avoided;

3. in the invention, a servo motor is started, an output shaft of the servo motor drives a second rotating shaft to rotate, the second rotating shaft drives an incomplete gear to rotate, the incomplete gear drives a vertical plate to vertically move downwards, the vertical plate drives a lower clamping box to vertically move downwards and extrude a spring, the lower clamping box drives a positioning block to vertically move downwards, the clamping state of the positioning block and a positioning groove is further relieved, and meanwhile, the incomplete gear is not meshed with gear teeth any more;

4. in the invention, the lower clamping box starts to vertically move upwards under the elastic force of the spring, at the moment, the incomplete gear drives the spur gear to rotate, the spur gear drives the first rotating shaft to rotate, the first rotating shaft drives the paper feeding roller and the first synchronous wheel to rotate, the paper feeding roller starts to convey the filter paper tape forwards, the first synchronous wheel drives the synchronous belt to rotate, the synchronous belt drives the second synchronous wheel to rotate, the second synchronous wheel drives the third rotating shaft to rotate, the third rotating shaft drives the paper winding roller to rotate, the paper winding roller starts to collect the filter paper tape, so that the filter paper tape can move forwards for a certain distance, and at the moment, because the upper clamping box is separated from the lower clamping box, the suction force of the fan is not too large, when the lower clamping box vertically moves upwards under the elastic force of the spring and the positioning block is clamped with the positioning groove again, the filter paper tape is also clamped by the upper clamping groove and the lower clamping groove, so that no wrinkles appear, and the filtering effect of the filter paper tape is ensured, and the Cs-138 in the air can be continuously monitored by the circulating reciprocating.

The lower clamping box is simple in structure, the first rotating shaft and the third rotating shaft are driven to rotate through the driving assembly, and then the lower clamping box can move downwards and the first rotating shaft and the second rotating shaft can rotate through the servo motor, so that the cost is reduced.

Drawings

FIG. 1 is a schematic sectional view of a Cs-138 continuous monitoring device and a detection method according to the present invention;

FIG. 2 is a schematic diagram of a rear cross-sectional view of a device and a method for continuously monitoring Cs-138 according to the present invention;

FIG. 3 is a schematic sectional view of the upper and lower cassettes of the present invention;

FIG. 4 is a side cross-sectional structural view of the upper cassette and the lower cassette of the present invention;

FIG. 5 is a front sectional view schematically showing the structure of the drying box according to the present invention;

FIG. 6 is a schematic top sectional view of a portion of the housing of the present invention;

FIG. 7 is a decay pattern of Cs-138 in accordance with the present invention.

In the figure: 1. a box body; 2. putting a card box; 3. a first intake pipe; 4. a drying oven; 5. a second intake pipe; 6. a first rotating shaft; 7. a paper feed roller; 8. a spur gear; 9. an incomplete gear; 10. a second rotating shaft; 11. gear teeth; 12. mounting a plate; 13. a spring; 14. a vertical plate; 15. an air outlet pipe; 16. a card discharging box; 17. a synchronous belt; 18. a third rotating shaft; 19. a paper winding roller; 20. filtering the paper tape; 21. fixing the rod; 22. a first synchronizing wheel; 23. a second synchronizing wheel; 24. an upper clamping groove; 25. a lower clamping groove; 26. a fan; 27. a gamma spectrum detector; 28. positioning a groove; 29. positioning blocks; 30. heating a tube; 31. an electric heating wire; 32. filtering with a screen; 33. a through hole; 34. a fixing plate; 35. a drive cartridge; 36. a servo motor; 37. an electric push rod; 38. and a brush.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Example one

Referring to fig. 1-7, a Cs-138 continuous monitoring device and a detection method thereof, comprising a box body 1, wherein an upper clamping box 2 is fixedly connected to the inner wall of the box body 1, a lower clamping box 16 is slidably connected to the inner wall of the box body 1, a third rotating shaft 18 and a first rotating shaft 6 are rotatably connected to the inner wall of one side of the box body 1, the first rotating shaft 6 and the third rotating shaft 18 are in transmission connection, a paper feeding roller 7 is fixedly sleeved on the outer wall of the first rotating shaft 6, a paper winding roller 19 is fixedly sleeved on the outer wall of the third rotating shaft 18, two symmetrically arranged fixing rods 21 are fixedly connected to the inner wall of the box body 1, the same filter paper tape 20 is wound on the outer walls of the paper winding roller 19, the paper feeding roller 7 and the two fixing rods 21, lower clamping boxes 16 are respectively provided with lower clamping grooves 25 on both sides of the top thereof, upper clamping grooves 24 are respectively provided on both sides of the bottom of the upper clamping box 2, the upper clamping grooves 24 and the lower clamping grooves 25 are respectively matched with the filter paper tape 20, a fan 26 is arranged inside the lower clamping box 16, lower calorie of 16's bottom fixedly connected with is linked together's outlet duct 15, the one end of outlet duct 15 extends to the outside of box 1, the inside of going up calorie of case 2 is provided with gamma energy spectrum detector 27, go up first intake pipe 3 that the top fixedly connected with of calorie of case 2 is linked together, the top inner wall fixedly connected with drying cabinet 4 of box 1, one side of drying cabinet 4 is linked together with the one end of first intake pipe 3, second intake pipe 5 that one side fixedly connected with that first intake pipe 3 was kept away from to drying cabinet 4 is linked together, the one end of second intake pipe 5 extends to the outside of box 1, one side of box 1 is provided with and is used for driving first pivot 6 and third pivot 18 pivoted drive assembly.

Example two

Referring to fig. 1-7, a Cs-138 continuous monitoring device and a detection method thereof, comprising a box body 1, wherein an upper clamping box 2 is fixedly connected to the inner wall of the box body 1, a lower clamping box 16 is slidably connected to the inner wall of the box body 1, a third rotating shaft 18 and a first rotating shaft 6 are rotatably connected to the inner wall of one side of the box body 1, the first rotating shaft 6 and the third rotating shaft 18 are in transmission connection, a paper feeding roller 7 is fixedly sleeved on the outer wall of the first rotating shaft 6, a paper winding roller 19 is fixedly sleeved on the outer wall of the third rotating shaft 18, two symmetrically arranged fixing rods 21 are fixedly connected to the inner wall of the box body 1, the same filter paper tape 20 is wound on the outer walls of the paper winding roller 19, the paper feeding roller 7 and the two fixing rods 21, lower clamping boxes 16 are respectively provided with lower clamping grooves 25 on both sides of the top thereof, upper clamping grooves 24 are respectively provided on both sides of the bottom of the upper clamping box 2, the upper clamping grooves 24 and the lower clamping grooves 25 are respectively matched with the filter paper tape 20, a fan 26 is arranged inside the lower clamping box 16, the bottom of the lower clamping box 16 is fixedly connected with an air outlet pipe 15 communicated with each other, one end of the air outlet pipe 15 extends to the outside of the box body 1, the inside of the upper clamping box 2 is provided with a gamma energy spectrum detector 27, the top of the upper clamping box 2 is fixedly connected with a first air inlet pipe 3 communicated with each other, the inner wall of the top of the box body 1 is fixedly connected with a drying box 4, one side of the drying box 4 is communicated with one end of the first air inlet pipe 3, one side of the drying box 4 far away from the first air inlet pipe 3 is fixedly connected with a second air inlet pipe 5 communicated with each other, one end of the second air inlet pipe 5 extends to the outside of the box body 1, one side of the box body 1 is provided with a driving component for driving the first rotating shaft 6 and the third rotating shaft 18 to rotate, the driving component comprises a driving box 35 fixedly connected to one side of the box body 1, the inner wall of one side of the driving box 35 is fixedly connected with a servo motor 36, an output shaft of the servo motor 36 penetrates through the box body 1 and is fixedly connected with the second rotating shaft 10, one end of the second rotating shaft 10 is fixedly connected with an incomplete gear 9, the outer wall of the first rotating shaft 6 is fixedly sleeved with a spur gear 8 meshed with the incomplete gear 9 and used for driving the first rotating shaft 6 and the third rotating shaft 18 to rotate, the outer wall of the first rotating shaft 6 is fixedly sleeved with a first synchronizing wheel 22, the outer wall of the third rotating shaft 18 is fixedly sleeved with a second synchronizing wheel 23, the outer wall of the first synchronizing wheel 22 and the outer wall of the second synchronizing wheel 23 are in transmission sleeved with a same synchronous belt 17, the top inner wall of the drying box 4 is fixedly connected with a heating pipe 30, an electric heating wire 31 is arranged inside the heating pipe 30, moisture in the air inside the drying box 4 can be attached to the heating pipe 30, a filter screen 32 is fixedly connected inside the drying box 4, a fixing plate 34 is fixedly connected to the inner wall of one side of the drying box 4 far away from the filter screen 32, a plurality of through holes 33 are formed inside the fixing plate 34, and an electric push rod 37 is fixedly connected to the top inner wall of the drying box 4, bottom fixedly connected with brush 38 of electric putter 37, brush 38 is inconsistent with one side of filter screen 32, brush 38 brushes the dust on filter screen 32 surface down, avoid filter screen 32 to block up, four constant head tanks 28 of two bisymmetries are seted up to the bottom of going up card case 2, four locating pieces 29 of two bisymmetries are seted up at the top of lower card case 16, constant head tank 28 and locating piece 29 looks block, the bottom fixedly connected with riser 14 of lower card case 16, one side fixedly connected with teeth of a cogwheel 11 of riser 14, one side inner wall fixedly connected with mounting panel 12 of box 1, the same spring 13 of fixedly connected with between the top of mounting panel 12 and the bottom of riser 14, make lower card case 16 can kick-back.

A method for continuous monitoring of Cs-138 comprising the steps of:

s1, starting a fan 26, sucking air outside the box body 1 into the upper card box 2 through a second air inlet pipe 5, a drying box 4 and a first air inlet pipe 3 by the fan 26 in sequence, filtering the air by the filter paper tape 20, remaining Cs-138 in the air on the upper surface of the filter paper tape 20, discharging the filtered air through an air outlet pipe 15, monitoring the Cs-138 on the surface of the filter paper tape 20 in real time by a gamma energy spectrum detector 27, measuring a radiation spectrum, extracting CS-138 full energy peak information obtained by sampling from the radiation spectrum by adopting a Cs-138 concentration measurement method, and calculating the concentration of the CS-138 in the air by combining sampling and measuring time;

s2, the filter screen 32 can filter out larger dust, the subsequent monitoring of Cs-138 is avoided being influenced, the electric heating wire 31 and the electric push rod 37 are started simultaneously, the electric push rod 37 drives the brush 38 to reciprocate in the vertical direction, the brush 38 brushes down the dust on the surface of the filter screen 32 to avoid the filter screen 32 from being blocked, the electric heating wire 31 heats the air inside the heating pipe 30, when the air outside the box body 1 enters the drying box 4 through the second air inlet pipe 5, the moisture of the air inside the drying box 4 can be attached to the heating pipe 30 and drops to the lower side of the fixing plate 34 through the through hole 33, the dust is wetted, and the dust is prevented from floating to influence air inlet;

s3, starting the servo motor 36, enabling an output shaft of the servo motor 36 to drive the second rotating shaft 10 to rotate, enabling the second rotating shaft 10 to drive the incomplete gear 9 to rotate, enabling the incomplete gear 9 to drive the vertical plate 14 to vertically move downwards, enabling the vertical plate 14 to drive the lower clamping box 16 to vertically move downwards and extrude the spring 13, enabling the lower clamping box 16 to drive the positioning block 29 to vertically move downwards, further releasing the clamping state of the positioning block 29 and the positioning groove 28, and enabling the incomplete gear 9 to be not meshed with the gear teeth 11;

s4, the lower card box 16 starts to move vertically upwards under the action of the elastic force of the spring 13, at this time, the incomplete gear 9 drives the spur gear 8 to rotate, the spur gear 8 drives the first rotating shaft 6 to rotate, the first rotating shaft 6 drives the paper feeding roller 7 and the first synchronizing wheel 22 to rotate, the paper feeding roller 7 starts to convey the filter paper tape 20 forwards, the first synchronizing wheel 22 drives the synchronizing belt 17 to rotate, the synchronizing belt 17 drives the second synchronizing wheel 23 to rotate, the second synchronizing wheel 23 drives the third rotating shaft 18 to rotate, the third rotating shaft 18 drives the paper winding roller 19 to rotate, the paper winding roller 19 starts to collect the filter paper tape 20, so that the filter paper tape 20 can move forwards for a certain distance, at this time, because the upper card box 2 is separated from the lower card box 16, the suction force of the fan 26 cannot be too large, when the lower card box 16 moves vertically upwards under the action of the elastic force of the spring 13, and the positioning block 29 is engaged with the positioning slot 28 again, the suction force of the fan 26 is increased again, the filter paper tape 20 is also clamped by the upper clamping groove 24 and the lower clamping groove 25, so that no wrinkles occur, the filtering effect of the filter paper tape 20 is ensured, and the Cs-138 in the air can be continuously monitored in a circulating reciprocating manner;

the formula of the Cs-138 concentration measurement method in step S1 is:

wherein the Chinese formula is 8.0612 multiplied by 10⁵、2.8392×10²、1.1781、3.3386×10²When the actual computer is used, a certain difference can be generated, the optimal error is controlled within 15 percent, and the moving time of the detection effective area is t_s，t_dFor time measurement, the effective net count of CS-138 is N_iThe detection efficiency is epsilon, and the sampling amount in the period is F_q，t_dThe time is less than 15min, t_sLess than 15 min.

The working principle is as follows: when the device is used, the fan 26 is started, the fan 26 sucks air outside the box body 1 into the upper card box 2 through the second air inlet pipe 5, the drying box 4 and the first air inlet pipe 3 in sequence, the Cs-138 in the air is retained on the upper surface of the filter paper tape 20 after the filter paper tape 20 is filtered, the filtered air is discharged through the air outlet pipe 15, the Cs-138 on the surface of the filter paper tape 20 is monitored in real time through the gamma energy spectrum detector 27, the radiation spectrum is measured, CS-138 full-energy peak information obtained by sampling is extracted from the radiation spectrum by adopting a Cs-138 concentration measurement method, the concentration of the CS-138 in the air is calculated by combining sampling and measuring time, the filter screen 32 can filter out larger dust, the subsequent monitoring of the Cs-138 is avoided, the electric heating wire 31 and the electric push rod 37 are started at the same time, the electric push rod 37 drives the brush 38 to reciprocate in the vertical direction, the brush 38 brushes dust on the surface of the filter screen 32 to prevent the filter screen 32 from being blocked, the heating wire 31 heats air inside the heating pipe 30, when air outside the box body 1 enters the drying box 4 through the second air inlet pipe 5, moisture in the air inside the drying box 4 adheres to the heating pipe 30 and drips to the lower part of the fixing plate 34 through the through hole 33 to wet the dust, so as to prevent the dust from floating and affecting air intake, the servo motor 36 is started, the output shaft of the servo motor 36 drives the second rotating shaft 10 to rotate, the second rotating shaft 10 drives the incomplete gear 9 to rotate, the incomplete gear 9 drives the vertical plate 14 to vertically move downwards, the vertical plate 14 drives the lower clamping box 16 to vertically move downwards and extrude the spring 13, the lower clamping box 16 drives the positioning block 29 to vertically move downwards, and further the clamping state of the positioning block 29 and the positioning groove 28 is released, and the incomplete gear 9 is not meshed with the gear teeth 11 any more, the lower card box 16 starts to move vertically upwards under the elastic force of the spring 13, at this time, the incomplete gear 9 drives the spur gear 8 to rotate, the spur gear 8 drives the first rotating shaft 6 to rotate, the first rotating shaft 6 drives the paper feeding roller 7 and the first synchronizing wheel 22 to rotate, the paper feeding roller 7 starts to convey the filter paper tape 20 forwards, the first synchronizing wheel 22 drives the synchronizing belt 17 to rotate, the synchronizing belt 17 drives the second synchronizing wheel 23 to rotate, the second synchronizing wheel 23 drives the third rotating shaft 18 to rotate, the third rotating shaft 18 drives the paper winding roller 19 to rotate, the paper winding roller 19 starts to collect the filter paper tape 20, so that the filter paper tape 20 can move forwards for a certain distance, at this time, because the upper card box 2 is separated from the lower card box 16, the suction force of the fan 26 is not too large, when the lower card box 16 moves vertically upwards under the elastic force of the spring 13, and the positioning block 29 is engaged with the positioning groove 28 again, the suction force of the fan 26 is increased again, the filter paper tape 20 is also clamped by the upper clamping groove 24 and the lower clamping groove 25, no wrinkles occur, the filtering effect of the filter paper tape 20 is ensured, and the Cs-138 in the air can be continuously monitored by circulating.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.