阅读说明：本技术 一种i-131长期连续监测装置及其监测方法 (I-131 long-term continuous monitoring device and monitoring method thereof ) 是由 沈辐 张贞 于 2021-08-24 设计创作，主要内容包括：本发明属于元素监测领域,尤其是一种I-131长期连续监测装置,针对现有的监测装置不能对空气进行长期连续监测,并且在使用时滤纸筒难以取下的问题,现提出如下方案,其包括壳体,所述壳体的一侧内壁活动连接有两个固定筒,本发明还提出一种I-131长期连续监测装置的监测方法,包括以下步骤：S1：首先将滤纸筒套在靠近进气管一侧的固定筒上,本发明不仅能够通过推动滑套时使滤纸筒能够快速简便的拆除和安装,提高产品使用的便捷性和对空气检测的效率,同时通过伽马能谱探测器和I-131浓度算法连续计算出I-131在空气中的浓度,提高测量的连续性,还能够对滤纸进行导向,使滤纸保持水平,提高I-131的过滤效果。(The invention belongs to the field of element monitoring, in particular to an I-131 long-term continuous monitoring device, which aims at solving the problems that the existing monitoring device can not carry out long-term continuous monitoring on air and a filter paper tube is difficult to take down when in use, and provides the following scheme, wherein the monitoring device comprises a shell, two fixed tubes are movably connected with the inner wall of one side of the shell, and the invention also provides a monitoring method of the I-131 long-term continuous monitoring device, which comprises the following steps: s1: the invention can not only improve the convenience of product use and the efficiency of air detection by quickly and simply detaching and installing the filter paper cylinder when pushing the sliding sleeve, but also continuously calculate the concentration of I-131 in the air by a gamma energy spectrum detector and an I-131 concentration algorithm, improve the measurement continuity, guide the filter paper, keep the filter paper horizontal and improve the filtering effect of the I-131.)

1. An I-131 long-term continuous monitoring device comprises a shell (1) and is characterized in that two fixed cylinders (12) are movably connected to the inner wall of one side of the shell (1), a gas collecting box (9) and a flow controller (10) are fixedly connected to the inner wall of one side of the shell (1), the top of the gas collecting box (9) of the flow controller (10) is communicated, an air inlet pipe (3) is fixedly connected to the air inlet end of the gas collecting box (9), an air suction pump (7) is fixedly connected to the inner wall of the bottom of the shell (1), the air inlet end of the air suction pump (7) is communicated with the bottom of the gas collecting box (9), an air outlet pipe (4) is fixedly connected to the air outlet end of the air suction pump (7), the air outlet pipe (4) and the air inlet pipe (3) both penetrate through the shell (1), and a gamma energy spectrum detector (28) is fixedly connected to the inner wall of one side of the gas collecting box (9), the fixed cylinder (12) comprises a rotating shaft (18), the rotating shaft (18) is rotatably connected to the inner wall of one side of the shell (1), the outer wall of the circumference of the rotating shaft (18) is movably connected with a first sliding frame (20) and a second sliding frame (21), a spring (24) is fixedly connected between the first sliding frame (20) and the second sliding frame (21), the outer wall of the circumference of the first sliding frame (20) and the outer wall of the circumference of the second sliding frame (21) are respectively movably connected with a plurality of first ejector rods (19) and second ejector rods (22), the first ejector rods (19) and the second ejector rods (22) are symmetrically arranged, one end of each first ejector rod (19) is movably connected with a top plate (23), the second ejector rod (22) is rotatably connected with the top plate (23), one end of the rotating shaft (18) is movably connected with a sliding sleeve (13), one side of each sliding sleeve (13) is fixedly connected with a plurality of connecting rods (14) and a push rod (15), and connecting rod (14) are fixed mutually with second carriage (21), a plurality of mounts (17) of circumference outer wall fixedly connected with of pivot (18), the equal swing joint in one end of mount (17) has swinging arms (16), and first spout (25) have been seted up to the one end of swinging arms (16), a plurality of second spouts (27) have been seted up to the circumference outer wall of first carriage (20), and swing joint has spacing post (26) in second spout (27), and first spout (25) and spacing post (26) sliding connection, one side outer wall fixedly connected with motor (6) of casing (1), and the one end of motor (6) output shaft passes casing (1) and is fixed mutually with one of them of pivot (18).

2. The I-131 long-term continuous monitoring device according to claim 1, characterized in that a door body (2) is movably connected to one side of the casing (1), and a door lock is arranged on one side of the door body (2).

3. The I-131 long-term continuous monitoring device according to claim 2, characterized in that a mounting opening is formed in one side of the door body (2), and a window (5) is arranged in the mounting opening.

4. The long-term continuous monitoring device of I-131 according to claim 1, characterized in that a control panel (29) is fixedly connected to one side outer wall of the shell (1).

5. The long-term continuous monitoring device for I-131 according to claim 1, characterized in that two guide posts (11) are movably connected to one side inner wall of the shell (1).

6. An I- (131) long-term continuous monitoring device according to claim 1, characterized in that a bracket (8) is fixedly connected to one side inner wall of the casing (1), and the bracket (8) penetrates through the gas collection box (9).

7. The monitoring method of the I-131 long term continuous monitoring device according to any one of claims 1-6, comprising the steps of:

s1: firstly, a filter paper cylinder is sleeved on a fixed cylinder (12) close to one side of an air inlet pipe (3), when the filter paper cylinder is sleeved, a sliding sleeve (13) is pressed, the sliding sleeve (13) pushes a second sliding frame (21) to slide through a connecting rod (14), the second sliding frame (21) pulls a top plate (23) to move towards a central point through a second ejector rod (22), the bottom of a swinging rod (16) is pushed to move through a push rod (15) while the sliding sleeve (13) moves, so that the other end of the swinging rod (16) pushes a second sliding seat (20) to move through a limiting column (26), and the second sliding seat (20) pulls the other end of the top plate (23) to move towards the central point through a first ejector rod (19), so that the diameter of the fixed cylinder (12) is reduced, and the installation of the filter paper cylinder is convenient;

s2: after the filter paper cylinder is placed, the sliding sleeve (13) is loosened, the first sliding frame (20) and the second sliding frame (21) are reset under the action of the spring (24), so that the filter paper cylinder is fixed, and the paper collection cylinder is installed on the other fixed cylinder (12) in the same way;

s3: the filter paper on the filter paper cylinder passes through the bottom of a first guide post (11), then passes through the gas collecting box (9), then passes through the bottom of another guide post (11), and then one end of the filter paper is fixed on the paper collecting cylinder;

s4: the method comprises the steps that a motor (6), a flow controller (10) and a gamma energy spectrum detector (28) are started through a control panel (29), then an air suction pump (7) is started, the motor (6) drives a fixed cylinder (12) far away from one side of the flow controller (10) to rotate, used filter paper is collected, meanwhile, the air suction pump (7) sucks air controlled by the flow controller (10) into a gas collection box (9) through an air inlet pipe (3), meanwhile, the air is filtered by the filter paper and then is discharged through an air outlet pipe (4), meanwhile, I-131 is filtered out by the filter paper, then the gamma energy spectrum detector (28) is used for measuring a radiation spectrum, then, an I-131 concentration algorithm is used for extracting I-131 full-energy peak information obtained by sampling from the radiation spectrum, and the concentration of the I-131 in the air is calculated by combining sampling and measuring time.

8. The monitoring method of the I-131 long-term continuous monitoring device according to claim 7, wherein the I-131 concentration algorithm is as follows:

in the formula, 1.004 x 10¹²、21.0022×10⁵、1.1781、1.1785×10⁵The error of the actual computer is within 5%.

9. The method of claim 8, wherein t is the time period t_dThe time is less than 15min, t_sLess than 15 min.

Technical Field

The invention relates to the technical field of element monitoring, in particular to an I-131 long-term continuous monitoring device and a monitoring method thereof.

Background

Iodine-131 is a radioactive isotope of elemental iodine, an artificial radionuclide (nuclear fission product), with the symbol I-131, and a half-life of 8.02 days, which is normally not present in nature, and iodine-131 can be used to label many compounds for in vivo or in vitro diagnosis of diseases, in addition to direct use in thyroid function examination and thyroid disease treatment in the form of NaI solutions.

However, the monitoring device used in the market cannot continuously monitor the air for a long time, and the filter paper tube is difficult to remove when in use, so that the efficiency of monitoring the air is reduced, and therefore, the I-131 long-term continuous monitoring device and the monitoring method thereof are provided.

Disclosure of Invention

The invention aims to solve the defects that a monitoring device used in the market in the prior art cannot continuously monitor air for a long time, a filter paper cylinder is difficult to remove when the monitoring device is used, and the efficiency of air monitoring is reduced, and provides an I-131 long-term continuous monitoring device and a monitoring method thereof.

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

an I-131 long-term continuous monitoring device and a monitoring method thereof comprise a shell, wherein two fixed cylinders are movably connected on the inner wall of one side of the shell, a gas collecting box and a flow controller are fixedly connected on the inner wall of one side of the shell, the top of the gas collecting box of the flow controller is communicated, an air inlet pipe is fixedly connected with the air inlet pipe of the gas collecting box, an air suction pump is fixedly connected on the inner wall of the bottom of the shell, the air inlet end of the air suction pump is communicated with the bottom of the gas collecting box, an air outlet pipe is fixedly connected with the air outlet pipe of the air suction pump, the air outlet pipe and the air inlet pipe both penetrate through the shell, a gamma energy spectrum detector is fixedly connected on the inner wall of one side of the gas collecting box, each fixed cylinder comprises a rotating shaft, the rotating shaft is rotatably connected on the inner wall of one side of the shell, a first sliding frame and a second sliding frame are movably connected on the outer circumferential wall of the rotating shaft, and a spring is fixedly connected between the first sliding frame and the second sliding frame, the circumferential outer walls of the first sliding frame and the second sliding frame are respectively movably connected with a plurality of first top rods and second top rods, the first ejector rod and the second ejector rod are symmetrically arranged, one end of the first ejector rod is movably connected with a top plate, the second ejector rod is rotationally connected with the top plate, one end of the rotating shaft is movably connected with a sliding sleeve, one side of the sliding sleeve is fixedly connected with a plurality of connecting rods and push rods, the connecting rod is fixed with the second sliding frame, the circumferential outer wall of the rotating shaft is fixedly connected with a plurality of fixing frames, one end of each fixing frame is movably connected with a swinging rod, one end of each swinging rod is provided with a first sliding chute, a plurality of second sliding chutes are arranged on the outer wall of the circumference of the first sliding frame, limiting posts are movably connected in the second sliding chutes, and first spout and spacing post sliding connection, one side outer wall fixedly connected with motor of casing, and the one end of motor output shaft passes the casing and is fixed mutually with one of them of pivot.

As a further scheme of the invention, one side of the shell is movably connected with a door body, and one side of the door body is provided with a door lock.

As a further scheme of the invention, one side of the door body is provided with a mounting opening, and a window is arranged in the mounting opening.

As a further scheme of the present invention, a control panel is fixedly connected to an outer wall of one side of the housing.

As a further scheme of the invention, the inner wall of one side of the shell is movably connected with two guide posts.

As a further scheme of the invention, a bracket is fixedly connected to the inner wall of one side of the shell, and the bracket penetrates through the gas collecting box.

The invention also provides a monitoring method of the I-131 long-term continuous monitoring device, which comprises the following steps:

s1: firstly, a filter paper cylinder is sleeved on a fixed cylinder close to one side of an air inlet pipe, when the filter paper cylinder is sleeved, a sliding sleeve is pressed, the sliding sleeve pushes a second sliding frame to slide through a connecting rod, the second sliding frame pulls a top plate to move towards a central point through a second ejector rod, the bottom of a swinging rod is pushed to move through a push rod while the sliding sleeve moves, so that the other end of the swinging rod pushes a second sliding seat to move through a limiting column, the second sliding seat pulls the other end of the top plate to move towards the central point through a first ejector rod, the diameter of the fixed cylinder is reduced, and the filter paper cylinder is convenient to install;

s2: after the filter paper cylinder is placed, the sliding sleeve is loosened, the first sliding frame and the second sliding frame reset under the action of the spring, so that the filter paper cylinder is fixed, and the paper collection cylinder is installed on the other fixed cylinder in the same way;

s3: the filter paper on the filter paper cylinder penetrates through the bottom of the first guide column, then penetrates through the gas collecting box, then penetrates through the bottom of the other guide column, and then one end of the filter paper is fixed on the paper collecting cylinder;

s4: the method comprises the steps of starting a motor, a flow controller and a gamma energy spectrum detector through a control panel, then starting an air suction pump, driving a fixed cylinder far away from one side of the flow controller to rotate by the motor, collecting used filter paper, simultaneously sucking air controlled by the flow controller into a gas collection box through an air inlet pipe by the air suction pump, simultaneously discharging the air through an air outlet pipe after the air is filtered by the filter paper, simultaneously filtering I-131 out by the filter paper, then measuring a radiation spectrum by adopting the gamma energy spectrum detector, then extracting I-131 full energy peak information obtained by sampling from the radiation spectrum by adopting an I-131 concentration algorithm, and calculating the concentration of the I-131 in the air by combining sampling and measuring time.

As a still further aspect of the present invention, the I-131 concentration algorithm is as follows:

in the formula, 1.004 x 10¹²、21.0022×10⁵、1.1781、1.1785×10⁵The error of the actual computer is within 5%.

As still further aspect of the present invention, the t is_dThe time is less than 15min, t_sLess than 15 min.

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

1. according to the invention, the diameter of the fixed cylinder can be changed, so that the filter paper cylinder can be quickly and simply dismounted and mounted when the sliding sleeve is pushed, and the convenience of product use and the efficiency of air detection are improved.

2. According to the invention, the fixed cylinder can always drive the filter paper to move, so that the I-131 in the air can be retained on the filter paper under the action of the suction pump, the concentration of the I-131 in the air is continuously calculated through the gamma energy spectrum detector and the I-131 concentration algorithm, and the measurement continuity is improved.

3. According to the invention, the bracket is arranged in the gas collecting box, so that the filter paper can be supported by the bracket when passing through the gas collecting box, the filter paper is prevented from being damaged by the suction pump, and the using effect of the device is improved.

4. According to the invention, the arrangement of the guide columns arranged on the two sides of the gas collection box enables the filter paper to be kept in the same horizontal position when the filter paper is conveyed through the gas collection box, so that the filtering effect of I-131 is improved.

According to the invention, the filter paper cylinder can be quickly, simply and conveniently detached and installed by pushing the sliding sleeve, so that the use convenience of the product and the detection efficiency of air are improved, meanwhile, the concentration of I-131 in the air is continuously calculated by a gamma energy spectrum detector and an I-131 concentration algorithm, the measurement continuity is improved, the filter paper can be guided, the filter paper is kept horizontal, and the filtering effect of I-131 is improved.

Drawings

FIG. 1 is a schematic front view of an I-131 long-term continuous monitoring device according to the present invention;

FIG. 2 is a schematic rear view of an I-131 long-term continuous monitoring device according to the present invention;

FIG. 3 is a schematic cross-sectional view of an I-131 long-term continuous monitoring device according to the present invention;

FIG. 4 is a schematic cross-sectional view of a fixing cylinder of an I-131 long-term continuous monitoring device according to the present invention;

FIG. 5 is an enlarged schematic view of point A of an I-131 long-term continuous monitoring device according to the present invention;

fig. 6 is a schematic cross-sectional structural view of a gas collecting box of an I-131 long-term continuous monitoring device provided by the invention.

In the figure: 1. a housing; 2. a door body; 3. an air inlet pipe; 4. an air outlet pipe; 5. a window; 6. a motor; 7. a getter pump; 8. a bracket; 9. a gas collection tank; 10. a flow controller; 11. a guide post; 12. a fixed cylinder; 13. a sliding sleeve; 14. a connecting rod; 15. a push rod; 16. a swing lever; 17. A fixed mount; 18. a rotating shaft; 19. a first ejector rod; 20. a first carriage; 21. a second carriage; 22. a second ejector rod; 23. a top plate; 24. a spring; 25. a first chute; 26. a limiting column; 27. a second chute; 28. a gamma spectrum detector; 29. a control panel.

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. 1-6, an I-131 long-term continuous monitoring device comprises a housing 1, wherein two fixed cylinders 12 are rotatably connected to one side inner wall of the housing 1, the diameters of the fixed cylinders 12 can be changed, so that the installation of a filter paper cylinder is convenient, a gas collecting tank 9 and a flow controller 10 are fixed to one side inner wall of the housing 1 through bolts, the top of the gas collecting tank 9 of the flow controller 10 is communicated, the flow controller 10 can control the flow of gas entering, the gas enters the gas collecting tank 9 after being controlled by the flow controller 10, a gas inlet pipe 3 is fixed to the gas inlet end of the gas collecting tank 9 through bolts, a gas suction pump 7 is fixed to the bottom inner wall of the housing 1 through bolts, the gas inlet end of the gas suction pump 7 is communicated with the bottom of the gas collecting tank 9, a gas outlet pipe 4 is fixed to the gas outlet end of the gas suction pump 7 through bolts, and the gas outlet pipe 4 and the gas inlet pipe 3 both penetrate through the housing 1, the air suction pump 7 can, the air suction pump 7 sucks the air controlled by the flow controller 10 into the gas collecting box 9 through the air inlet pipe 3, meanwhile, the air is discharged through the air outlet pipe 4 after being filtered by the filter paper, the gamma energy spectrum detector 28 is fixed on one side inner wall of the gas collecting box 9 through bolts, the fixed cylinder 12 comprises a rotating shaft 18, the rotating shaft 18 is rotatably connected with one side inner wall of the shell 1, the circumferential outer wall of the rotating shaft 18 is slidably connected with a first sliding frame 20 and a second sliding frame 21, a spring 24 is fixed between the first sliding frame 20 and the second sliding frame 21 through bolts, the circumferential outer walls of the first sliding frame 20 and the second sliding frame 21 are respectively rotatably connected with a plurality of first ejector rods 19 and second ejector rods 22, the first ejector rods 19 and the second ejector rods 22 are symmetrically installed, one end of the first ejector rod 19 is rotatably connected with a top plate 23, and the second ejector rods 22 are rotatably connected with the top plate 23, one end of the rotating shaft 18 is connected with a sliding sleeve 13 in a sliding way, one side of the sliding sleeve 13 is fixed with a plurality of connecting rods 14 and push rods 15 through bolts, and the connecting rod 14 is fixed with the second sliding frame 21, a plurality of fixed frames 17 are fixed on the circumferential outer wall of the rotating shaft 18 through bolts, one end of each fixed frame 17 is rotatably connected with a swinging rod 16, the push rod 15 is kept in contact with the swinging rod 16, so that the push rod 15 can push the swing rod 16 to swing when moving, one end of the swing rod 16 is provided with a first sliding chute 25, the circumferential outer wall of the first sliding frame 20 is provided with a plurality of second sliding chutes 27, the second sliding chutes 27 are rotatably connected with limit posts 26, and the first sliding chute 25 is connected with the limit post 26 in a sliding way, the outer wall of one side of the shell 1 is fixed with the motor 6 through a bolt, and one end of the output shaft of the motor 6 penetrates through the shell 1 and is fixed with one of the rotating shafts 18, and the motor 6 provides power for the rotation of the fixed cylinder 12.

Example two

Referring to fig. 1 to 6, the present invention provides a new technical solution: an I-131 long-term continuous monitoring device comprises a shell 1, a control panel 29 is fixed on the outer wall of one side of the shell 1 through bolts, two fixed cylinders 12 are rotatably connected on the inner wall of one side of the shell 1, the diameters of the fixed cylinders 12 can be changed, so that the installation of a paper filter cylinder is convenient, a door body 2 is rotatably connected on one side of the shell 1, a door lock is arranged on one side of the door body 2, the installation and replacement of the paper filter cylinder can be convenient when the door body 2 is opened, an installation opening is formed in one side of the door body 2, a window 5 is arranged in the installation opening, workers can conveniently observe the inside the device through the window 5, a gas collection box 9 and a flow controller 10 are fixed on the inner wall of one side of the shell 1 through bolts, the top of the gas collection box 9 of the flow controller 10 is communicated, the flow controller 10 can control the flow of gas entering, and the gas enters the gas collection box 9 after being controlled by the flow controller 10, an air inlet pipe 3 is fixed on the air inlet end of a gas collection box 9 through a bolt, an air suction pump 7 is fixed on the inner wall of the bottom of a shell 1 through a bolt, the air inlet end of the air suction pump 7 is communicated with the bottom of the gas collection box 9, an air outlet pipe 4 is fixed on the air outlet end of the air suction pump 7 through a bolt, the air outlet pipe 4 and the air inlet pipe 3 both penetrate through the shell 1, two guide posts 11 are rotatably connected on the inner wall of one side of the shell 1, the guide posts 11 can enable filter paper to be kept at the same horizontal position when the filter paper is conveyed through the gas collection box 9, the air suction pump 7 sucks air controlled by a flow controller 10 into the gas collection box 9 through the air inlet pipe 3, meanwhile, the air is filtered by the filter paper and then is discharged through the air outlet pipe 4, a gamma energy spectrum detector 28 is fixed on the inner wall of one side of the gas collection box 9 through a bolt, a fixed cylinder 12 comprises a rotating shaft 18, and the rotating shaft 18 is rotatably connected on the inner wall of one side of the shell 1, a first sliding frame 20 and a second sliding frame 21 are connected to the circumferential outer wall of the rotating shaft 18 in a sliding manner, a spring 24 is fixed between the first sliding frame 20 and the second sliding frame 21 through bolts, a plurality of first ejector rods 19 and a plurality of second ejector rods 22 are respectively connected to the circumferential outer walls of the first sliding frame 20 and the second sliding frame 21 in a rotating manner, the first ejector rods 19 and the second ejector rods 22 are symmetrically installed, one end of each first ejector rod 19 is connected with a top plate 23 in a rotating manner, the second ejector rods 22 are connected with the top plate 23 in a rotating manner, one end of the rotating shaft 18 is connected with a sliding sleeve 13 in a sliding manner, one side of each sliding sleeve 13 is fixed with a plurality of connecting rods 14 and push rods 15 through bolts, the connecting rods 14 are fixed with the second sliding frame 21, a plurality of fixing frames 17 are fixed to the circumferential outer wall of the rotating shaft 18 through bolts, one end of each fixing frame 17 is connected with a swinging rod 16 in a rotating manner, the push rods 15 are kept in contact with the swinging rods 16, so that the swinging rods 16 can be pushed when the push rods 15 move, first spout 25 has been seted up to the one end of swinging arms 16, a plurality of second spouts 27 have been seted up to the circumference outer wall of first carriage 20, second spout 27 internal rotation is connected with spacing post 26, and first spout 25 and spacing post 26 sliding connection, one side outer wall of casing 1 has motor 6 through the bolt fastening, and the one end of motor 6 output shaft passes casing 1 and is fixed mutually with one of them looks of pivot 18, motor 6 provides power for the rotation of a fixed cylinder 12, one side inner wall of casing 1 has bracket 8 through the bolt fastening, and bracket 8 runs through gas collection case 9, bracket 8 can support filter paper.

The invention also provides a monitoring method of the I-131 long-term continuous monitoring device, which comprises the following steps:

s1: firstly, a filter paper cylinder is sleeved on a fixed cylinder 12 close to one side of an air inlet pipe 3, when the filter paper cylinder is sleeved, a sliding sleeve 13 is pressed, the sliding sleeve 13 pushes a second sliding frame 21 to slide through a connecting rod 14, the second sliding frame 21 pulls a top plate 23 to move towards a central point through a second ejector rod 22, the bottom of a swinging rod 16 is pushed to move through a push rod 15 while the sliding sleeve 13 moves, so that the other end of the swinging rod 16 pushes a second sliding seat 20 to move through a limiting column 26, and the second sliding seat 20 pulls the other end of the top plate 23 to move towards the central point through a first ejector rod 19, so that the diameter of the fixed cylinder 12 is reduced, and the filter paper cylinder is convenient to mount;

s2: after the filter paper cylinder is placed, the sliding sleeve 13 is loosened, the first sliding frame 20 and the second sliding frame 21 are reset under the action of the spring 24, so that the filter paper cylinder is fixed, and the paper collection cylinder is installed on the other fixed cylinder 12 in the same way;

s3: the filter paper on the filter paper cylinder passes through the bottom of the first guide column 11, then passes through the gas collecting box 9, then passes through the bottom of the other guide column 11, and then one end of the filter paper is fixed on the paper collecting cylinder;

s4: the motor 6, the flow controller 10 and the gamma energy spectrum detector 28 are started through the control panel 29, then the air suction pump 7 is started, the motor 6 drives the fixed cylinder 12 far away from one side of the flow controller 10 to rotate, used filter paper is collected, meanwhile, the air suction pump 7 sucks air controlled by the flow controller 10 into the air collection box 9 through the air inlet pipe 3, meanwhile, the air is filtered by the filter paper and then is discharged through the air outlet pipe 4, meanwhile, the I-131 is filtered out by the filter paper, then the gamma energy spectrum detector 28 is used for measuring a radiation spectrum, then, an I-131 concentration algorithm is used for extracting I-131 full energy peak information obtained by sampling from the radiation spectrum, and the concentration of the I-131 in the air is calculated by combining sampling and measuring time.

The I-131 concentration algorithm is as follows:

in the formula, 1.004 x 10¹²、21.0022×10⁵、1.1781、1.1785×10⁵When the practical computer is used, the error is within 5 percent, t_dThe time is less than 15min, t_sLess than 15 min.

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.