Indoor radon detection device based on remote control

Abstract

The invention discloses an indoor radon detection device based on remote control in the technical field of radon concentration detection, and aims to solve the problems of inconvenience in operation, personal safety and the like caused by long-term manual participation of existing small-sized radon concentration monitoring equipment in the prior art. The device comprises a trolley and a mounting table arranged on the trolley, and an alpha particle measuring device, an air pump, a pipe reeling mechanism, a lifting mechanism, a controller and a front camera are arranged on the mounting table. The alpha particle measuring device comprises a measuring gas chamber and an alpha particle detector, the alpha particle detector is composed of a silicon photomultiplier (SiPM) and a scintillator, and the scintillator is installed in the gas chamber of the alpha particle measuring device. The controller at least comprises an analog-to-digital converter and a wireless signal transceiving module; the device is used for remotely detecting the concentration of radon in a room, sampling detection can be conveniently carried out at different height positions, meanwhile, testing cannot cause corresponding safety risks to personnel, and the convenience, safety and accuracy of radon concentration monitoring can be improved.

Description

Technical Field

[0001] The present invention relates to an indoor radon detection device based on remote control, belonging to the technical field of radon concentration detection. Background Art

[0002] Some building materials such as granite, cement bricks, etc. may contain trace amounts of uranium or radium. These materials will slowly release radon gas during the manufacturing process. During the decay process of radon gas, α particles will be released. Inhaled radon gas will cause radiation damage to lung cells and increase the risk of lung cancer. Radon is considered the second leading cause of cancer after smoking. Long-term exposure to a high-concentration radon gas environment, especially in a closed and poorly ventilated indoor environment, may lead to the occurrence of lung cancer. Therefore, for newly installed houses, detecting the change of indoor radon gas concentration has very important reference significance.

[0003] Traditional radon concentration detection equipment is bulky. However, with the development of technology in recent years, such as a portable radon concentration detection device proposed in patent number CN202110605296.X, which determines the concentration of radon in the air by detecting α particles in the air through a scintillator, realizing the miniaturization and lightweight of radon concentration detection, and has very important significance for indoor radon concentration detection.

[0004] Since radon gas has a high density and is easy to settle in the lower positions of the indoor, the indoor radon concentration distribution is uneven, which is not convenient for detecting the radon gas concentration at different positions in the room to judge the average concentration. If the operator carries this portable detection device and is exposed to the radon gas environment for a long time, it will also increase the risk of cancer for the operator. Therefore, there is an urgent need for a device that can long-term monitor the change of indoor radon concentration, which can analyze the average concentration while avoiding the safety risks to the test personnel. Summary of the Invention

[0005] The purpose of the present invention is to overcome the deficiencies in the prior art and provide an indoor radon detection device based on remote control, which is used to remotely detect the concentration of radon in the room. It can be portable to sample and detect at different height positions, and the test will not pose corresponding safety risks to personnel, which helps to improve the convenience, safety and accuracy of radon concentration monitoring.

[0006] To achieve the above purpose, the present invention is implemented by the following technical solutions: An indoor radon detection device based on remote control provided by the present invention includes a trolley and a mounting platform arranged on the trolley. The mounting platform is provided with an α particle measuring device, an air pump, a reel mechanism, a lifting mechanism, a controller and a front camera. The α particle measuring device includes a measuring gas chamber and an α particle detector: The coiling tube mechanism includes two oppositely arranged mounting plates. A hollow sleeve with an opening on one side is rotatably arranged between the two mounting plates. An air tube is wound around the hollow sleeve. One end of the air tube is communicated with the inside of the hollow sleeve, and the other end of the air tube is fixedly arranged on the moving end of the lifting mechanism. A first driving mechanism for driving the hollow sleeve to rotate is installed on the trolley. A ventilation tube penetrating the mounting plate is arranged on the opening side of the hollow sleeve. A pipe joint capable of covering the ventilation tube is also arranged on the mounting plate at this position. The pipe joint and the air pump are respectively communicated with the air inlet end and the air outlet end of the air chamber of the α-particle measuring device through a connecting tube; The α-particle detector includes a silicon photomultiplier tube and a scintillator. The scintillator is installed in the air chamber of the α-particle measuring device. The controller at least includes an analog-to-digital converter and a wireless signal transceiver module. The α-particle measuring device, the driver of the trolley, the air pump, the driver of the lifting mechanism, the first driving mechanism, and the front camera are all electrically connected to the controller.

[0007] Specifically, a turntable is arranged on one of the mounting plates. The first driving mechanism is used to drive the turntable to rotate. The closed side of the hollow sleeve is installed on the turntable. The ventilation tube is fixedly installed on the opening side of the hollow sleeve. The pipe joint is fixedly arranged on the mounting plate to cover the ventilation tube and does not contact the ventilation tube.

[0008] Specifically, the lifting mechanism includes a scissor-type lifting arm and a fixed platform arranged above the scissor-type lifting arm. A buckling member for fixing the end of the air tube is arranged on the fixed platform.

[0009] Specifically, a fixed bracket is also installed on the fixed platform. The fixed bracket is used to fix the activated carbon adsorption layer. The air inlet end of the air tube is fixed on the end face of the activated carbon adsorption layer.

[0010] Specifically, the silicon photomultiplier tube of the α-particle detector is attached to the side wall of the air chamber. A semiconductor refrigeration sheet is arranged on the outer surface of the α-particle measuring device. The refrigerating surface of the semiconductor refrigeration sheet is arranged close to the silicon photomultiplier tube. The semiconductor refrigeration sheet is electrically connected to the controller.

[0011] Specifically, a heat sink is also installed on the outer surface of the α-particle measuring device. The heat sink is attached to the heating surface of the semiconductor refrigeration sheet.

[0012] Specifically, an installation frame is also arranged at the position on the trolley between the lifting mechanism and the coiling tube mechanism. A sliding block is slidably arranged on the installation frame. A second driving mechanism for driving the sliding block to slide is also arranged on the installation frame. A limiting piece is installed on the sliding block. A limiting hole for the air tube to pass through is arranged on the limiting piece. The second driving mechanism is used to drive the limiting piece to drive the air tube to move in the axial direction of the hollow sleeve.

[0013] Specifically, a pair of mounting pieces are provided on both sides of the mounting table. A connecting rod is rotatably arranged between every two opposite mounting pieces. Support feet are mounted on both connecting rods. A third driving mechanism for driving the connecting rod to rotate is further provided on the mounting table, and the third driving mechanism is electrically connected to the controller.

[0014] Specifically, the third driving mechanism is a double-shaft motor. Output rods are provided on both sides of the double-shaft motor. The output rods on both sides and the connecting rods on both sides are connected by bevel gears in transmission. The cooperation mode of multiple bevel gears satisfies that the support feet on both sides can be lifted or lowered simultaneously when the double-shaft motor is driving.

[0015] Specifically, a flow sensor matched with the connecting pipe is further provided on the mounting table, and the flow sensor is electrically connected to the controller.

[0016] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: By mounting a detection integration device related to an α-particle semiconductor detector on a remote trolley, the present invention realizes the remote detection of the change of indoor radon concentration. The device is equipped with a lifting mechanism for raising the intake height position of the sampling pipe, and can further analyze and detect the gas in different height position areas during the movement of the trolley, so as to analyze and detect the radon concentration in different areas and at different height positions in the room, which helps to judge the average content of indoor radon gas. Through the provided pipe coiling mechanism, the normal storage of the sampling pipe can be ensured, and the convolution and bending of the pipeline can be avoided, which affects the normal sampling. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic diagram of the overall structure of the detection device provided by an embodiment of the present invention; Figure 2 is the present invention Figure 1 is an enlarged view of the structure at A of the detection device provided by an embodiment of the present invention; Figure 3 is a schematic diagram of the partial structure of the detection device provided by an embodiment of the present invention; Figure 4 is the present invention Figure 3 is an enlarged view of the structure at B of the detection device provided by an embodiment of the present invention; Figure 5 is a rear view of the detection device provided by an embodiment of the present invention; Figure 6 is the present invention Figure 5 is a cross-sectional view of the detection device provided by an embodiment of the present invention in the C-C direction; Figure 7 is the present invention Figure 6 is an enlarged view of the structure at D of the detection device provided by an embodiment of the present invention; Figure 8 The present invention Figure 5 A cross-sectional view of the detection device provided in the embodiment in the EE direction; Figure 9 The present invention Figure 8 An enlarged view of the structure at position F of the detection device provided in the embodiment; Figure numerals: 1. trolley; 2. mounting platform; 3. α particle measuring device; 4. air pump; 5. mounting plate; 6. hollow sleeve; 7. air pipe; 8. ventilation pipe; 9. pipe joint; 10. scissor-type lifting arm; 11. fixing platform; 12. fixing bracket; 13. activated carbon adsorption layer; 14. first driving mechanism; 15. controller; 16. front camera; 17. connecting rod; 18. support foot; 19. third driving mechanism; 20. output rod; 21. mounting plate; 22. bevel gear; 23. battery; 24. semiconductor cooling plate; 25. heat sink; 26. mounting frame; 27. sliding block; 28. second driving mechanism; 29. ​​limit plate. DETAILED DESCRIPTION

[0018] The present invention will be further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention.

[0019] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0020] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0021] An indoor radon detection device based on remote control provided by an embodiment of the present invention is used to remotely detect the concentration of radon in a room. While being able to sample and detect at different height positions in a portable manner, the test will not pose corresponding safety risks to personnel, which helps to improve the convenience, safety, and accuracy of radon concentration monitoring. In order to realize the structural functions of the detection device, the device is provided with a trolley 1 and a mounting table 2 arranged on the trolley 1. Specifically, an alpha particle measurement device 3, an air pump 4, a tubing winding mechanism, a lifting mechanism, a controller 15, and a front camera 16 are arranged on the mounting table 2. The alpha particle measurement device 3 here is mainly used to measure the alpha particles generated during the decay process of radon gas. The alpha particles strike the scintillator film (such as ZnS:Ag film) to generate photons, and then the silicon photomultiplier tube (SiPM) converts the optical signal into a corresponding electrical pulse signal for transmission. Thus, the concentration of radon in the air is determined by detecting the amplitude and number of electrical pulse signals. The scintillator film can be prepared by depositing about 50um of ZnS:Ag film on quartz glass. The scintillator film is closely attached to the surface of the SiPM to ensure efficient transmission of photons. The specific structure will not be elaborated here. The air pump 4 provided on the trolley 1 is used to actively extract the gas in the air chamber, reduce the detection time consumption by increasing the air flow rate, and ensure the efficient progress of the detection. The lifting mechanism is used to drive the intake end of the detection air tube 7 to rise and fall, so as to be able to sample and analyze at different height positions in the room, thereby facilitating the judgment of the radon concentration change at different height positions in the room, which is conducive to the analysis of the average concentration. In order to ensure the convenience of the trolley 1 moving in the room, the lifting device should avoid using a too long frame. Preferably, it can be set as a scissor-type lifting mechanism, so as to ensure a small volume and a lower center of gravity when it is folded, and avoid the rollover of the trolley 1. The tubing winding mechanism is used to wind and unwind the detection air tube 7. When the intake end of the air tube 7 moves upward, it can supply the air tube 7 to facilitate its normal elongation. After the intake end of the air tube 7 descends, it can normally store the air tube 7 to avoid the tubing being wound around other component positions, preventing the jamming of the air tube 7 or affecting the normal operation of other structures. The controller 15 uses an ASIC integrated chip. When applied in the silicon photomultiplier tube detection circuit, it should include a preamplifier, a filter, and an analog-to-digital converter, etc. Then, STM32 MCU is used for pulse counting and energy discrimination. Since this module structure belongs to the prior art, it will not be elaborated here. The front camera 16 is used to provide image information for remote control, so that the detection personnel can control the trolley 1 to move in different areas of the room. The controller 15 should also include a corresponding wireless signal transceiver module and a corresponding control circuit, etc. The principle based on which the wireless signal transceiver works will not be limited here. Users can choose based on wireless network control, Bluetooth control, local area network control, infrared signal control, Zigbee control, or LoRa control, etc. according to their needs. The specific configuration method will not be limited here.Since the coiling mechanism needs to consider the normal ventilation of the pipeline during operation, a novel configuration is required to specially design the coiling mechanism. For this purpose, the coiling mechanism is provided here, including two oppositely arranged mounting plates 5, as follows. Figure 3 , Figure 6 and Figure 7 shown, a hollow sleeve 6 with an opening on one side is rotatably arranged between the two mounting plates 5. The detection air pipe 7 is wound around the hollow sleeve 6. Specifically, one end of the air pipe 7 is connected to the inside of the hollow sleeve 6, and the other end of the air pipe 7 is fixedly arranged on the moving end of the lifting mechanism. Through this design, the rotation of the hollow sleeve 6 drives the change of the position of the air pipe 7, but the final gas will be output through the hollow sleeve 6, that is, the actual gas outlet position will no longer be affected by the winding of the air pipe 7. A first driving mechanism 14 for driving the rotation of the hollow sleeve 6 is installed on the configuration trolley 1. By using the winding and unwinding of the first driving mechanism 14, the air pipe 7 is stored and released on the hollow sleeve 6. In order to stably transmit the extracted gas to the α-particle measuring device 3, a ventilation pipe 8 penetrating the mounting plate 5 is provided on the opening side of the hollow sleeve 6, and the gas in the hollow sleeve 6 will be output through the ventilation pipe 8, as Figure 7As shown in the figure, a pipe joint 9 is also provided on the mounting plate 5 at this position, which can cover the ventilation pipe 8. At this time, the gas discharged from the ventilation pipe 8 will enter the interior of the pipe joint 9. Finally, the pipe joint 9 and the air pump 4 are respectively connected to the intake end and the outlet end of the gas chamber of the α-particle measuring device 3 through a connecting pipe. In this configuration, when the first driving mechanism 14 drives the air pipe 7 to release or store, the final gas is output by the ventilation pipe 8, and the pipe joint 9 receives the gas from the ventilation pipe 8 and finally inputs it into the reaction gas chamber of the α-particle measuring device 3 through the connecting pipe. While ensuring the good storage characteristics of the air pipe 7, the stable supply of gas is ensured; the above-mentioned α-particle measuring device 3 includes a gas chamber and an α-particle detector. The α-particle detector is composed of a silicon photomultiplier tube and a scintillator. The scintillator (ZnS:Ag film) is arranged in the gas chamber of the α-particle measuring device 3. The controller 15 at least includes an analog-to-digital converter (ADC) and a wireless signal transceiver module. In order to drive the normal operation of the structure, the α-particle measuring device 3, the driver of the trolley 1, the air pump 4, the driver of the lifting mechanism, the first driving mechanism 14 and the front camera 16 are all electrically connected to the controller 15. The analysis module can be integrated in an ASIC chip, or the corresponding digital signal can be sent to the control end by the wireless signal transceiver module and analyzed by the control end. In order to improve the endurance of the trolley 1, a large-capacity battery 23 is preferably additionally configured on the trolley 1 for long-term monitoring applications. As another preferred embodiment, a temperature sensor and a humidity sensor can also be equipped on the trolley 1, which can be used to consider the influence of temperature and humidity when the radon concentration changes in the research room, so as to more effectively judge the concentration of indoor radon and the corresponding influencing factors, and thus facilitate obtaining more data for later analysis of the influence of radon gas diffusion.

[0022] For the indoor radon detection device based on remote control provided by the embodiment of the present invention, in order to facilitate the disassembly and assembly of the hollow sleeve 6, one of the mounting plates 5 can be slidably configured on the mounting table 2. By moving away from or approaching the other mounting plate 5, the installation and assembly work of the hollow sleeve 6 can be facilitated. In order to further simplify the installation work, a turntable can be rotatably provided on one of the mounting plates 5, and a first driving mechanism 14 (such as a motor) is provided to drive the turntable to rotate. The hollow sleeve 6 can directly install its closed side on the turntable. At this time, the ventilation pipe 8 is fixedly installed on the open side of the hollow sleeve 6 so that it directly penetrates through the other mounting plate 5. The pipe joint 9 is fixedly provided on the mounting plate 5 to cover the ventilation pipe 8 and does not contact the ventilation pipe 8. At this time, the ventilation pipe 8 should be in sealed cooperation with the mounting plate 5 to ensure that the gas extracted by the pipe joint 9 comes from the sampling air pipe 7.

[0023] An indoor radon detection device based on remote control provided by an embodiment of the present invention. Considering optimizing the air intake effect and reducing the pollution of impurities in the air to the reaction gas chamber, in addition to setting a lifting mechanism including a scissor lift arm 10, a fixed platform 11 is provided above the scissor lift arm 10. A fastening member is provided on the fixed platform 11 to fix the end of the air pipe 7. At the same time, a fixed bracket 12 is installed on the fixed platform 11 for installing and fixing the activated carbon adsorption layer 13. In addition to filtering general impurities, the activated carbon adsorption layer 13 can also be used to adsorb other radioactive aerosols, ensuring the reaction accuracy of the scintillator coating and reducing background interference. In addition, this structure can also remove volatile organic compounds in the air, avoiding the formation of interference films on the surface of the detector and affecting the scintillator luminescence efficiency. To improve the air intake range, the intake end of the air pipe 7 can be fixed to the end face of the activated carbon adsorption layer 13, converting the pipe hole adsorption into microporous adsorption. Although the air intake volume is reduced, it helps to improve the uniformity of air intake. As another implementation manner, the above-mentioned activated carbon adsorption layer 13 can also be replaced with 4A molecular sieve with a pore diameter of 0.4 nm to remove some other impurities in the air with a diameter greater than 0.4 nm (the diameter of radon gas is about 0.2 nm).

[0024] An indoor radon detection device based on remote control provided by an embodiment of the present invention. To improve the α-particle detection accuracy of the silicon photomultiplier tube, considering that a relatively high temperature may cause the silicon photomultiplier tube to be mis-triggered by APD (micrometer-scale avalanche photodiode) due to thermal noise. To reduce the impact of this mis-triggering, the silicon photomultiplier tube of the α-particle detector can be set to fit the side wall of the gas chamber, and a semiconductor refrigeration sheet 24 is provided at a position on the outer surface of the α-particle measuring device 3 close to the α-particle detector. The refrigerating surface of the semiconductor refrigeration sheet 24 is set close to the silicon photomultiplier tube and is electrically connected to the controller 15. After being powered on, the silicon photomultiplier tube is cooled to reduce the mis-triggering probability and improve the detection accuracy. To prevent the temperature of the heat dissipation surface of the semiconductor refrigeration sheet 24 from being too high and affecting the operation, a heat sink 25 is also installed on the outer surface of the α-particle measuring device 3, and the heat sink 25 is set to fit the heating surface of the semiconductor refrigeration sheet 24.

[0025] An indoor radon detection device based on remote control provided by an embodiment of the present invention. Considering that if only a rotatable hollow sleeve 6 is provided, when the hollow sleeve 6 winds up the air pipe 7, the air pipe 7 will accumulate in a certain area. As the winding continues, the accumulation diameter will become larger and larger, which will affect the rotation control accuracy of the motor and cause the air pipe 7 to become loose again, and will also increase the required volume of the hollow sleeve 6 and affect the occupied space of the trolley 1. To weaken this influence, an installation frame 26 is also provided on the trolley 1 at a position between the lifting mechanism and the pipe winding mechanism, as Figure 1 andFigure 8 As shown, specifically, a sliding block 27 is slidably arranged on the mounting bracket 26, and a second driving mechanism 28 for driving the sliding block 27 to slide is further arranged on the mounting bracket 26. A limiting piece 29 is installed on the sliding block 27, and a limiting hole through which the air supply pipe 7 passes is arranged on the limiting piece 29. By restricting the air pipe 7 within the position of the limiting hole, the limiting piece 29 can guide the winding position of the air pipe 7 closer to the required winding position during the movement process. By arranging the second driving mechanism 28 to drive the limiting piece 29 to drive the air pipe 7 to move in the axial direction of the hollow sleeve 6, the air pipe 7 can be actively and evenly laid on the outer surface of the hollow sleeve 6 during the winding process, and finally the winding diameter is optimized. The air pipe 7 can also avoid the possibility of increased blockage caused by accumulation. In order to ensure the relationship between the ventilation volume and the actual concentration, a flow sensor matched with the connecting pipe is further arranged on the mounting table 2, and the flow sensor is electrically connected to the controller 15, so as to avoid the situation that the actual concentration does not match the detected concentration caused by the bending of the air pipe 7 or the air leakage of the mechanism. In addition to combining the control of the motor operating speed and the above measures, in order to avoid errors in the matching accuracy between the first driving mechanism 14 and the driving part of the lifting mechanism, resulting in excessive tension on the air pipe 7 and causing it to deform when wound on the hollow sleeve 6, and further being subjected to pressure during the winding process and causing the air pipe 7 to close, the hollow sleeve 6 can be arranged not to be directly fixedly opposed to the rotating shaft of the first driving mechanism 14. The hollow sleeve 6 can be arranged to be rotatably connected to the output shaft of the first driving mechanism 14 through a bearing, and an elastic friction plate (not shown in the figure) is fixedly arranged on the rotating shaft of the first driving mechanism 14 and used to abut against the wall surface of the hollow sleeve 6. Preferably, the friction force of the friction plate can be adjusted (such as using an adjusting bolt to abut against the elastic layer, etc.). That is, at this time, the hollow sleeve 6 is actually driven to rotate by the static friction force of the friction plate. When the tension on the wound air pipe 7 is too large, although the output shaft of the first driving mechanism 14 rotates normally, the friction plate will slide relative to the hollow sleeve 6, so as to avoid the air pipe 7 being further stretched and deformed, and prevent the air path of the air pipe 7 from closing due to excessive tension during the winding process.

[0026] For a remote-controlled indoor radon detection device provided by an embodiment of the present invention, in order to improve the stability of the trolley 1 and avoid the rollover of the trolley 1 when the center of gravity changes due to the rising of the lifting mechanism, a pair of mounting pieces 21 are arranged on both sides of the mounting table 2, as Figure 1 and Figure 2As shown, a connecting rod 17 is rotatably arranged between every two opposite mounting plates 21, and legs 18 are installed on the two connecting rods 17. The legs 18 are preferably opened in a V-shape, and a third driving mechanism 19 for driving the connecting rod 17 to rotate is also provided on the mounting platform 2. The third driving mechanism 19 is electrically connected to the controller 15. When the trolley 1 needs to transport the detection end of the air pipe 7 to a higher position, the legs 18 can be opened first to increase the force range of the legs 18, thereby improving the stability of the trolley 1 and reducing the risk of rollover. When the legs 18 are not needed, they can be lifted and folded to ensure the ability of the trolley 1 to travel in a narrow space.

[0027] In an embodiment of the present invention, a remote-controlled indoor radon detection device is provided. In order to facilitate synchronous control of the legs 18 on both sides, the third driving mechanism 19 is set as a double-axis motor, and output rods 20 are set on both sides of the double-axis motor. Figure 2 As shown, the output rods 20 on both sides and the connecting rods 17 on both sides are connected by bevel gears 22. The cooperation of the multiple bevel gears 22 satisfies that the legs 18 on both sides can be lifted or lowered at the same time when the dual-axis motor is driven. That is, the legs 18 on both sides can be retracted and extended at the same time through a one-time drive of the dual-axis motor, which improves synchronization and reduces space costs and additional procurement control costs.

[0028] The detection device designed above utilizes the form of a small vehicle 1 to perform travel detection at different locations indoors, and can perform individual long-term monitoring when the user needs it. The configuration of the small vehicle 1 is flexible, which is conducive to application in different scenarios.

[0029] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. An indoor radon detection device based on remote control, characterized in that, It includes a trolley and a mounting platform arranged on the trolley. An α-particle measuring device, an air pump, a hose winding mechanism, a lifting mechanism, a controller and a front camera are provided on the mounting platform. The α-particle measuring device includes a measuring gas chamber and an α-particle detector: The hose winding mechanism includes two oppositely arranged mounting plates. A hollow sleeve with an opening on one side is rotatably arranged between the two mounting plates. A gas hose is wound around the hollow sleeve. One end of the gas hose is communicated with the inside of the hollow sleeve, and the other end of the gas hose is fixedly arranged on the moving end of the lifting mechanism. A first driving mechanism for driving the hollow sleeve to rotate is installed on the trolley. A ventilation pipe penetrating through the mounting plate is arranged on the opening side of the hollow sleeve. A pipe joint capable of covering the ventilation pipe is also provided on the mounting plate at this position. The pipe joint and the air pump are respectively communicated with the air inlet end and the air outlet end of the gas chamber of the α-particle measuring device through a connecting pipe; The α-particle detector includes a silicon photomultiplier tube and a scintillator. The scintillator is installed in the gas chamber of the α-particle measuring device. The controller at least includes an analog-to-digital converter and a wireless signal transceiver module. The α-particle measuring device, the driver of the trolley, the air pump, the driver of the lifting mechanism, the first driving mechanism and the front camera are all electrically connected to the controller.

2. The indoor radon detection device based on remote control according to claim 1, characterized in that, A turntable is arranged on one of the mounting plates. The first driving mechanism is used to drive the turntable to rotate. The closed side of the hollow sleeve is installed on the turntable. The ventilation pipe is fixedly installed on the opening side of the hollow sleeve. The pipe joint is fixedly arranged on the mounting plate to cover the ventilation pipe and does not contact the ventilation pipe.

3. The indoor radon detection device based on remote control according to claim 1, characterized in that, The lifting mechanism includes a scissor-type lifting arm and a fixed platform arranged above the scissor-type lifting arm. A fastening member for fixing the end of the gas hose is provided on the fixed platform.

4. The indoor radon detection device based on remote control according to claim 2, characterized in that, A fixed bracket is also installed on the fixed platform. The fixed bracket is used to fix the activated carbon adsorption layer. The air inlet end of the gas hose is fixed to the end face of the activated carbon adsorption layer.

5. The indoor radon detection device based on remote control according to claim 1, characterized in that, The silicon photomultiplier tube of the α-particle detector is attached to the side wall of the gas chamber. A semiconductor refrigerating sheet is arranged on the outer surface of the α-particle measuring device. The refrigerating surface of the semiconductor refrigerating sheet is arranged close to the silicon photomultiplier tube. The semiconductor refrigerating sheet is electrically connected to the controller.

6. The indoor radon detection device based on remote control according to claim 5, wherein, A heat sink is also installed on the outer surface of the α-particle measuring device. The heat sink is attached to the heating surface of the semiconductor refrigerating sheet.

7. The indoor radon detection device based on remote control according to claim 1, characterized in that, An installation frame is also arranged on the trolley at a position between the lifting mechanism and the hose winding mechanism. A sliding block is slidably arranged on the installation frame. A second driving mechanism for driving the sliding block to slide is also provided on the installation frame. A limiting piece is installed on the sliding block. A limiting hole for the gas hose to pass through is provided on the limiting piece. The second driving mechanism is used to drive the limiting piece to drive the gas hose to move in the axial direction of the hollow sleeve.

8. The indoor radon detection device based on remote control according to claim 1, characterized in that, A pair of mounting pieces are arranged on both sides of the mounting platform. A connecting rod is rotatably arranged between every two opposite mounting pieces. Support feet are installed on both of the connecting rods. A third driving mechanism for driving the connecting rod to rotate is also provided on the mounting platform. The third driving mechanism is electrically connected to the controller.

9. The indoor radon detection device based on remote control according to claim 8, characterized in that, The third driving mechanism is a dual-axis motor, and output rods are arranged on both sides of the dual-axis motor. The output rods on both sides and the connecting rods on both sides are connected by bevel gear transmission. The matching mode of multiple bevel gears satisfies that the supporting legs on both sides can be lifted or lowered at the same time when the dual-axis motor is driven.

10. The indoor radon detection device based on remote control according to claim 1, characterized in that, The mounting platform is also provided with a flow sensor matched with the connecting pipe, and the flow sensor is electrically connected to the controller.

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