A portable negative oxygen ion detection device

Abstract

The present application belongs to the technical field of intelligent sensor detection, and particularly relates to a portable negative oxygen ion detection device, which comprises a base and further comprises a detection mechanism, a wind direction monitoring feedback adjusting mechanism, a wind force monitoring feedback adjusting mechanism, an air inlet mode conversion mechanism, a lifting height threshold self-adjusting mechanism and a PLC controller. The present application enables the air inlet to be always located in the windward direction, and enables the air inlet to be directed to the air flow direction, so that the real environmental negative oxygen ion concentration can be maximally reflected, and the use means of active air supplement or natural air inlet can be automatically selected based on the wind force, the air inlet amount in the natural air inlet process can be automatically regulated based on the environmental wind force, the stable air inlet detection can be ensured regardless of the large or small wind force, and the detection height that can be finally reached and the lifting speed in the adjusting detection height process can be automatically regulated based on the environmental wind force.

Description

Technical Field

[0001] This invention belongs to the field of intelligent sensor detection technology, and in particular relates to a portable negative oxygen ion detection device. Background Technology

[0002] Negative oxygen ion concentration is one of the core indicators for measuring the quality of the ecological environment, and the accuracy of its detection results directly affects the assessment of ecosystem health and the effectiveness of ecological protection early warning. In natural environments such as forests, mountains, and wetlands, natural processes such as vegetation photosynthesis and wave breaking continuously generate negative oxygen ions. High concentrations of negative oxygen ions usually indicate the stability and health of the ecosystem; while an abnormal decrease in negative oxygen ion concentration often foreshadows ecological disturbance events such as deforestation and wetland drying, providing a key early warning signal for ecological protection work.

[0003] Currently, traditional sensors used for detecting negative oxygen ion concentration mostly adopt a fixed air inlet design, and the orientation of the air inlet cannot be dynamically adjusted according to environmental conditions after installation. However, the air flow direction in outdoor natural environments has significant dynamism and scene specificity—for example, airflow in valleys flows along the terrain, and sea breezes dominate the airflow direction at the seaside. This objective characteristic places strict requirements on the accuracy of negative oxygen ion detection.

[0004] Existing fixed-inlet sensors suffer from the following technical drawbacks: Because the inlet's orientation is fixed, it cannot match the dynamically changing airflow direction outdoors, making it difficult for the sensor to continuously collect "undisturbed fresh air samples." Specifically, when the inlet is not aligned with the airflow direction, the collected air is mostly localized circulating air or airflow obstructed by surrounding objects. This results in an unstable source of negative oxygen ions, causing significant fluctuations in the detection data. Furthermore, while airflow could continuously deliver naturally generated negative oxygen ions to the detection area, the mismatch in inlet orientation prevents the sensor from effectively capturing these ions, leading to detected values ​​lower than the actual negative oxygen ion concentration. These problems directly result in insufficient detection accuracy and poor data reliability of traditional sensors, failing to provide accurate data support for ecological environment health assessments. Consequently, this affects the timeliness and effectiveness of ecological early warnings, making it difficult to meet the current practical needs of the ecological environment monitoring field for high-precision negative oxygen ion detection. Summary of the Invention

[0005] The purpose of this invention is to address the above-mentioned problems by providing a portable negative oxygen ion detection device.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a portable negative oxygen ion detection device, including a base, and further comprising: The testing mechanism is fixedly installed at the upper end of the base; A wind direction monitoring feedback adjustment mechanism is rotatably connected to the top of the detection mechanism; The wind force monitoring and feedback adjustment mechanism is fixedly installed on the detection mechanism; An air intake mode conversion mechanism is fixedly connected to the air intake end of the detection mechanism; A height adjustment mechanism is fixedly installed at the upper end of the base. The PLC controller is fixedly installed inside the detection mechanism and is electrically connected to the wind direction monitoring feedback adjustment mechanism, the wind force monitoring feedback adjustment mechanism, the air intake mode conversion mechanism, and the lifting height threshold self-adjustment mechanism.

[0007] In the aforementioned portable negative oxygen ion detection device, the detection mechanism includes four symmetrically fixed electric lifting rods connected to the upper end of the base. The upper moving ends of the four electric lifting rods are fixedly connected to the same detection shell. A negative oxygen ion detector and a battery are fixedly installed inside the detection shell. An air inlet pipe is rotatably sleeved on the top of the detection shell. The lower end of the air inlet pipe extends through into the detection shell and is rotatably connected to the air inlet of the negative oxygen ion detector through a rotary sealing joint. A motor rotation assembly for driving the air inlet pipe to rotate is fixedly installed on the top of the inner wall of the detection shell.

[0008] In the aforementioned portable negative oxygen ion detection device, the wind direction monitoring feedback adjustment mechanism includes a rotating cylinder rotatably connected to the top of the detection shell via a bearing. The rotating cylinder is rotatably sleeved outside the air inlet pipe. A wind vane is fixedly installed on the rotating cylinder. A proximity switch is fixedly inserted into the cylinder wall of the rotating cylinder. The air inlet pipe is located inside the rotating cylinder and is closed and fixedly connected to a sensing metal rod that corresponds to the position of the proximity switch.

[0009] In the aforementioned portable negative oxygen ion detection device, the wind force monitoring feedback adjustment mechanism includes a feedback shell fixedly installed on the air inlet pipe. Multiple insertion holes are provided on one side wall of the feedback shell, and multiple parallel force-bearing rods are movably inserted into the corresponding insertion holes. One end of each force-bearing rod outside the feedback shell is fixedly connected to the same force-bearing plate, and the other end of each force-bearing rod inside the feedback shell is fixedly connected to the same feedback seat. Multiple compensating springs sleeved on the force-bearing rods are fixedly connected to the opposite side of the feedback seat and the feedback shell. A feedback resistor rod parallel to the force-bearing rod is fixedly installed on the inner wall of the feedback shell. A feedback conductive contact piece electrically in contact with the feedback resistor rod is fixedly connected to one side of the feedback seat. A laser rangefinder, opposite to the feedback seat, is fixedly inserted into the rear end of the feedback shell.

[0010] In the aforementioned portable negative oxygen ion detection device, the air intake mode conversion mechanism includes a fixed plate fixedly installed at the end of the air intake pipe, a connecting frame rotatably mounted on the fixed plate, a motor drive assembly for driving the connecting frame to rotate fixedly mounted on the fixed plate, an active suction hood and an air guide hood fixedly connected to both ends of the connecting frame respectively, an exhaust fan fixedly installed inside the active suction hood, and an air intake volume control mechanism installed inside the front end of the air guide hood.

[0011] In the aforementioned portable negative oxygen ion detection device, the height threshold self-adjusting mechanism includes an adjustment shell. Multiple parallel positioning slide rods are fixedly connected to the upper inner wall of the adjustment shell. A single sliding plate is slidably sleeved around each of the positioning slide rods. Multiple return springs, sleeved around the positioning slide rods, are fixedly connected to the sliding plate and the side of the adjustment shell opposite to the sliding plate. A thrust permanent magnet plate is fixedly connected to the side wall of the sliding plate. A thrust electromagnetic plate, opposite to the thrust permanent magnet plate, is fixedly installed on the inner wall of the adjustment shell. A position switch is fixedly installed on the side wall of the sliding plate away from the thrust permanent magnet plate. A synchronous screw, parallel to the positioning slide rods, is rotatably connected to the lower inner wall of the adjustment shell. A synchronous motor for driving the synchronous screw to rotate is fixedly installed on the outer wall of the adjustment shell. A synchronous plate is threaded onto the rod wall of the synchronous screw, and the synchronous plate is opposite to the position switch.

[0012] In the aforementioned portable negative oxygen ion detection device, the air intake control mechanism includes multiple air guide plates rotatably connected to the front end of the inner wall of the air guide hood via deflection shafts. One end of the deflection shaft extends through the air guide hood and is fixedly connected to a transmission gear. A mounting shell, which covers the multiple transmission gears, is fixedly installed on the outer wall of the air guide hood. A transmission rack that meshes with the multiple transmission gears is slidably connected to the inner wall of the mounting shell. An insulating plate is fixedly connected to the upper end of the transmission rack. A permanent magnet plate is fixedly installed on the upper end of the insulating plate. A magnetic electromagnetic plate, which is opposite to the permanent magnet plate, is fixedly installed on the top of the inner wall of the mounting shell. A limiting slide rod is fixedly connected to the lower end of the transmission rack. The lower end of the limiting slide rod extends through the lower end of the mounting shell. A pull-down spring, sleeved on the limiting slide rod, is fixedly connected to the lower end of the transmission rack and the bottom of the inner wall of the mounting shell.

[0013] In the aforementioned portable negative oxygen ion detection device, the base is symmetrically fitted with four U-shaped locking plates, and the lower end of each U-shaped locking plate is fixedly equipped with a universal roller. The U-shaped locking plate and the base are detachably connected by bolts.

[0014] Compared with existing technologies, the advantages of this invention are as follows: 1. Through the established detection mechanism and wind direction monitoring feedback adjustment mechanism, the system can monitor changes in wind direction in the environment during detection in real time. Based on the change in direction, it automatically adjusts the position of the detection air inlet to ensure that the air inlet is always facing the wind. Orienting the air inlet towards the direction of air flow ensures that the detection device can collect "fresh" and undisturbed air samples. This maximizes the reflection of the true concentration of negative oxygen ions in the environment. It avoids situations where the air inlet is not oriented towards the direction of air flow, which would lead to a lower detected concentration of negative oxygen ions than the actual concentration. This is because air flow can continuously deliver negative oxygen ions to the vicinity of the detector. When the air inlet is not oriented in the correct direction, the detector cannot effectively capture these ions. Furthermore, because it is not in the direction of air flow, the air entering the air inlet may be locally circulated air or air disturbed by surrounding objects. In this case, the source of negative oxygen ions entering the detector is unstable, resulting in large fluctuations in the detection data and affecting the accuracy of negative oxygen ion detection.

[0015] 2. Through the wind force monitoring and feedback adjustment mechanism and the air intake mode conversion mechanism, the ambient wind force can be monitored synchronously, and the active air intake or natural air intake can be selected based on the wind force. Natural air intake is used when the ambient wind is strong, while active air intake is used in relatively calm environments. Natural air intake can better reflect the true ambient air conditions, while active air intake can ensure that there are enough air samples entering the test when the natural air flow is very weak.

[0016] 3. Through the set air intake control mechanism, the air intake volume during the natural air intake process can be automatically adjusted based on the ambient wind force, ensuring stable air intake detection regardless of wind strength. This avoids the instability of airflow entering the detection device's air intake due to strong winds. Under natural air intake conditions, strong winds can cause a sudden increase in air intake volume, creating turbulence at the air intake. This can interfere with the normal air intake process, making the air sample entering the detection device not uniformly represent the surrounding environment. For example, the air intake may draw in a large amount of air in a short period of time, and the concentration of negative oxygen ions may differ from that during stable air intake, leading to deviations in the detection results. This improvement enhances the detection quality.

[0017] 4. Through the established wind force monitoring and feedback adjustment mechanism and the self-adjusting mechanism for the elevation and stabilization threshold, the detection height of negative oxygen ions can be rapidly adjusted. Different elevations result in varying concentrations of negative oxygen ions, reflecting the differences in vegetation ecological functions across vertical space. For example, in forests, the concentration of negative oxygen ions is lower near the ground and higher near the canopy. This indicates that the vegetation in the canopy plays a more significant role in releasing negative oxygen ions during photosynthesis and other processes, making it a major contributor to oxygen and negative oxygen ion production in the forest ecosystem. This information reflects the intensity of physiological activity at different vegetation levels and also indicates the main processes of energy and material exchange in the forest ecosystem. The region is of great significance for studying the carbon sequestration function and ecological balance of forest ecosystems. It automatically regulates the final detection height and the ascent and descent speed during the adjustment of the detection height based on the strength of the ambient wind. The stronger the ambient wind, the lower the final detection height and the slower the ascent and descent speed. This is because stronger ambient wind will generate a greater physical impact on the entire detection device, making it more prone to vibration. Rapid ascent and descent will subject the detection device to greater impact forces in the wind, increasing the risk of damage and instability. At the same time, an excessively high detection height will make the center of the entire detection device more unstable and prone to tipping over. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural schematic diagram of the present invention; Figure 2 This is a frontal sectional view of the present invention; Figure 3 This is a cross-sectional structural schematic diagram of the wind direction monitoring feedback adjustment mechanism of the present invention; Figure 4 This is a cross-sectional structural schematic diagram of the wind force monitoring feedback adjustment mechanism of the present invention; Figure 5 This is a cross-sectional structural schematic diagram of the air intake mode conversion mechanism of the present invention; Figure 6 This is a side sectional view of the air intake control mechanism of the present invention. Figure 7 This is a cross-sectional structural schematic diagram of the self-adjusting height threshold mechanism of the present invention.

[0019] In the diagram: 1. Base; 2. Detection mechanism; 21. Electric lifting rod; 22. Detection shell; 23. Negative oxygen ion detector; 24. Battery; 25. Air inlet pipe; 26. Motor rotation assembly; 3. Wind direction monitoring feedback adjustment mechanism; 31. Rotating cylinder; 32. Wind vane; 33. Proximity switch; 34. Induction metal rod; 4. Wind force monitoring feedback adjustment mechanism; 41. Feedback shell; 42. Force rod; 43. Force plate; 44. Feedback seat; 45. Compensation spring; 46. Feedback resistor rod; 47. Feedback conductive contact; 48. Laser rangefinder; 5. Air inlet mode conversion mechanism; 51. Fixing plate; 52. Connecting frame; 53. Motor drive assembly; 54. Active suction hood, 55 air guide hood, 56 exhaust fan, 6 height threshold self-adjusting mechanism, 61 adjusting shell, 62 positioning slide bar, 63 sliding plate, 64 return spring, 65 thrust permanent magnet plate, 66 thrust electromagnetic plate, 67 position switch, 68 synchronous screw, 69 synchronous motor, 610 synchronous plate, 7 air intake control mechanism, 71 deflection shaft, 72 air guide plate, 73 transmission gear, 74 mounting shell, 75 transmission rack, 76 insulating plate, 77 suction permanent magnet plate, 78 suction electromagnetic plate, 79 limit slide bar, 710 pull-down spring, 8 PLC controller, 9 U-shaped locking plate, 10 omnidirectional rollers. Detailed Implementation

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0021] like Figures 1-7 As shown, a portable negative oxygen ion detection device includes a base 1, four U-shaped locking plates 9 symmetrically fitted around the base 1, universal casters 10 fixedly mounted on the lower end of each U-shaped locking plate 9, and the U-shaped locking plates 9 and the base 1 detachably connected by bolts. The device also includes: The detection mechanism 2 is fixedly installed on the upper end of the base 1. The detection mechanism 2 includes four symmetrically fixed electric lifting rods 21 connected to the upper end of the base 1. The upper moving ends of the four electric lifting rods 21 are fixedly connected to the same detection shell 22. The negative oxygen ion detector 23 and the battery 24 are fixedly installed inside the detection shell 22. The top of the detection shell 22 is rotatably sleeved with an air inlet pipe 25. The lower end of the air inlet pipe 25 extends through into the detection shell 22 and is rotatably connected to the air inlet of the negative oxygen ion detector 23 through a rotary sealing joint. The top of the inner wall of the detection shell 22 is fixedly installed with a motor rotation assembly 26 for driving the air inlet pipe 25 to rotate, which can quickly adjust the air inlet direction to ensure stable detection work.

[0022] The wind direction monitoring feedback adjustment mechanism 3 is rotatably connected to the top of the detection mechanism 2. The wind direction monitoring feedback adjustment mechanism 3 includes a rotating cylinder 31 rotatably connected to the top of the detection housing 22 via a bearing. The rotating cylinder 31 is rotatably sleeved outside the air inlet pipe 25. A wind vane 32 is fixedly installed on the rotating cylinder 31. A proximity switch 33 is fixedly inserted into the cylinder wall of the rotating cylinder 31. The air inlet pipe 25 is located inside the rotating cylinder 31 and is fixedly connected to a sensing metal rod 34 that corresponds to the position of the proximity switch 33. This mechanism can quickly determine the ambient wind direction and provide reliable wind direction information.

[0023] The wind force monitoring feedback adjustment mechanism 4 is fixedly installed on the detection mechanism 2. The wind force monitoring feedback adjustment mechanism 4 includes a feedback shell 41 fixedly installed on the air inlet pipe 25. Multiple insertion holes are opened on one side wall of the feedback shell 41, and multiple parallel force-bearing rods 42 are inserted into the corresponding insertion holes. The ends of the multiple force-bearing rods 42 located outside the feedback shell 41 are fixedly connected to the same force-bearing plate 43, and the ends of the multiple force-bearing rods 42 located inside the feedback shell 41 are fixedly connected to the same feedback seat 44. The feedback seat 44 and... Multiple compensating springs 45, sleeved on the outside of the force-bearing rod 42, are fixedly connected to one side of the feedback shell 41. A feedback resistor rod 46, parallel to the force-bearing rod 42, is fixedly installed on the inner wall of the feedback shell 41. A feedback conductive contact 47, which is in electrical contact with the feedback resistor rod 46, is fixedly connected to one side of the feedback seat 44. A laser rangefinder 48, which is opposite to the feedback seat 44, is fixedly inserted at the rear end of the feedback shell 41. This allows for digital feedback of wind speed, facilitating adjustments by various mechanisms based on changes in wind speed.

[0024] The air intake mode conversion mechanism 5 is fixedly connected to the air intake end of the detection mechanism 2. The air intake mode conversion mechanism 5 includes a fixed plate 51 fixedly installed at the end of the air intake pipe 25. A connecting frame 52 is rotatably mounted on the fixed plate 51. A motor drive assembly 53 for driving the connecting frame 52 to rotate is fixedly installed on the fixed plate 51. An active suction hood 54 and an air guide hood 55 are fixedly connected to both ends of the connecting frame 52, respectively. An exhaust fan 56 is fixedly installed inside the active suction hood 54. An air intake volume control mechanism 7 is also installed inside the front end of the air guide hood 55. It can synchronously monitor the magnitude of the ambient wind force and automatically select whether to use active air supply or natural air intake based on the wind force.

[0025] The air intake control mechanism 7 includes multiple air guide plates 72 rotatably connected to the front end of the inner wall of the air guide shroud 55 via deflection shafts 71. One end of the deflection shaft 71 extends through the air guide shroud 55 and is fixedly connected to a transmission gear 73. The outer wall of the air guide shroud 55 is fixedly fitted with a mounting shell 74 that covers the multiple transmission gears 73. The inner wall of the mounting shell 74 is slidably connected to a transmission rack 75 that meshes with the multiple transmission gears 73. An insulating plate 76 is fixedly connected to the upper end of the transmission rack 75. A magnetic permanent magnet plate 77 is fixedly installed at the upper end of the insulating plate 76. A magnetic electromagnetic plate 78, which is opposite to the magnetic permanent magnet plate 77, is fixedly installed at the top of the inner wall of the mounting shell 74. A limit slide rod 79 is fixedly connected to the lower end of the transmission rack 75. The lower end of the limit slide rod 79 extends through the lower end of the mounting shell 74. A pull-down spring 710, which is sleeved on the limit slide rod 79, is fixedly connected to the lower end of the transmission rack 75 and the bottom of the inner wall of the mounting shell 74.

[0026] A height adjustment mechanism 6 is fixedly installed on the upper end of the base 1. The height adjustment mechanism 6 includes an adjustment shell 61. Multiple parallel positioning slide rods 62 are fixedly connected to the upper inner wall of the adjustment shell 61. A common sliding plate 63 is slidably sleeved around the multiple positioning slide rods 62. Multiple return springs 64, sleeved on the outside of the positioning slide rods 62, are fixedly connected to the side of the sliding plate 63 opposite to the adjustment shell 61. A thrust permanent magnet plate 65 is fixedly connected to the side wall of the sliding plate 63. A thrust electromagnetic plate 66 is fixedly installed on the inner wall, which is opposite to the thrust permanent magnet plate 65. A position switch 67 is fixedly installed on the side wall of the sliding plate 63 away from the thrust permanent magnet plate 65. A synchronous screw 68, which is parallel to the positioning slide rod 62, is rotatably connected to the lower inner wall of the adjusting shell 61. A synchronous motor 69 for driving the synchronous screw 68 to rotate is fixedly installed on the outer wall of the adjusting shell 61. A synchronous plate 610 is threaded onto the rod wall of the synchronous screw 68. The synchronous plate 610 is opposite to the position switch 67.

[0027] The PLC controller 8 is fixedly installed inside the detection mechanism 2 and is electrically connected to the wind direction monitoring feedback adjustment mechanism 3, the wind force monitoring feedback adjustment mechanism 4, the air intake mode conversion mechanism 5, and the lifting height threshold self-adjustment mechanism 6.

[0028] The operating principle of the present invention is described as follows: The U-shaped locking plate 9 is fixed to the base 1 with bolts, so that four universal rollers 10 can be installed on the lower end of the base 1, realizing the rapid movement of the entire detection device, and facilitating the carrying and transportation of the detection device. After the entire detection device is moved to a suitable position, the PLC controller 8 controls the electric lifting rod 21 to push the detection housing 22 up to a suitable height. The wind in the environment will drive the wind vane 32 to rotate to the windward position. The wind vane 32 will drive the rotating cylinder 31 to rotate synchronously. The proximity switch 33 on the rotating cylinder 31 will also move synchronously, thereby separating the proximity switch 33 from the sensing metal rod 34. [The proximity switch 33 is a position switch that can be operated without direct mechanical contact with moving parts. When the sensing metal rod 34 moves to the sensing surface of the proximity switch 33 to the operating distance, no mechanical contact or application is required.] Any pressure can activate the proximity switch 33, thereby driving the DC electrical appliance or providing control commands to the PLC controller 8. At this time, the PLC controller 8 receives the separated signal and controls the motor rotation assembly 26 to drive the air inlet pipe 25 to rotate. The air inlet pipe 25 will drive the sensing metal rod 34 to move synchronously until the sensing metal rod 34 moves to the position of the proximity switch 33 again. At this time, the PLC controller 8 controls the motor rotation assembly 26 to stop, so that the air inlet of the air inlet pipe 25 is also in the windward position, ensuring that the detection device can collect "fresh" and undisturbed air samples. At this time, the force plate 43 is also positioned to face the wind. The wind in the environment will blow directly onto the force plate 43, causing it to move under wind pressure in conjunction with the force rod 42 to overcome the elastic force of the compensating spring 45. The stronger the wind, the greater the distance the force plate 43 moves, which in turn drives the feedback seat 44 to move a greater distance. The laser rangefinder 48 monitors the distance between itself and the feedback seat 44 in real time. Specifically, the initial distance between the laser rangefinder 48 and the feedback seat 44 is set to 10cm. When the wind force is between 1 and 5 meters... At a speed of / second, the distance between the feedback seat 44 and the laser rangefinder 48 is 5-9cm. At this time, the PLC controller 8 controls the motor drive assembly 53 to drive the connecting frame 52 to rotate, so that the air guide shroud 55 moves to the air inlet of the air inlet pipe 25. At this time, the multiple air guide plates 72 inside the air guide shroud 55 are also in a horizontal state, so that the air inlet of the air guide shroud 55 is fully opened, and the air naturally enters the air inlet pipe 25 through the air guide shroud 55, and then enters the negative oxygen ion detector 23 to detect the concentration of negative oxygen ions. When the ambient wind speed exceeds 5 m / s, the distance between the feedback seat 44 and the laser rangefinder 48 is 0-5 cm, which is defined as a strong wind condition. The PLC controller 8 controls the power supply equipment to supply power to the magnetic attraction plate 78. The magnetic attraction plate 78 generates a magnetic force opposite to that of the magnetic attraction permanent magnet plate 77, which in turn provides an attractive force to the insulating plate 76. This, in turn, drives the transmission rack 75 to move upward against the elastic force of the pull-down spring 710. The feedback conductive contact 47 and the feedback resistor 46 are connected in series in the power supply circuit of the magnetic attraction plate 78. Specifically, when the ambient wind speed is higher, the feedback seat 44 drives the feedback conductive contact 47 to move upward against the pull-down spring 710. The greater the sliding distance of the resistance rod 46, the smaller the resistance value of the feedback resistance rod 46, which in turn results in a larger supply current to the electromagnetic plate 78, a stronger magnetic attraction force of the electromagnetic plate 78, and a greater upward movement of the transmission rack 75. The meshing action of the transmission rack 75 and the transmission gear 73 drives the rotating shaft of the drive plate to rotate at a larger angle, resulting in a smaller air inlet of the air guide shroud 55. This prevents strong winds from causing a sudden increase in air volume and creating turbulence at the air inlet, which would interfere with the normal air intake process and prevent the air sample entering the detection device from uniformly representing the surrounding environment. When the ambient wind speed is less than 1 m / s, the distance between the feedback seat 44 and the laser rangefinder 48 is 9-10 cm, indicating that the wind is relatively calm. At this time, the PLC controller 8 controls the motor drive assembly 53 to drive the connecting frame 52 to rotate the active suction hood 54 to the air inlet of the air inlet pipe 25. The PLC controller 8 synchronously controls the exhaust fan 56 to work and perform active air replenishment to ensure a stable amount of air sample collected. The stronger the ambient wind, the lower the resistance of the feedback resistor 46. Based on this resistance signal, the PLC controller 8 controls the electric lifting rod 21 to operate at a slower lifting speed when the height of the detection housing 22 needs to be adjusted, ensuring operational stability. The feedback conductive contact 47 and the feedback resistor 46 are also connected in series in the power supply circuit of the thrust electromagnetic plate 66. When the thrust electromagnetic plate 66 is energized, it generates the same magnetism as the thrust permanent magnet plate 65, thereby driving the sliding plate 63 to slide along the positioning slide rod 62 against the elastic force of the return spring 64. The stronger the ambient wind, the lower the resistance of the feedback resistor 46, which in turn increases the magnetic force of the thrust electromagnetic plate 66, causing the sliding plate 63 to move a greater distance towards the position switch 67. This results in a smaller distance between the position switch 67 and the synchronization plate 610. During the operation of the electric lifting rod 21… When the electric lifting rod 21 is pushed up, the PLC controller 8 controls the synchronous motor 69 to rotate forward. When the electric lifting rod 21 is lowered, the PLC controller 8 controls the synchronous motor 69 to rotate in reverse. When the synchronous motor 69 drives the synchronous screw 68 to rotate forward, the synchronous screw 68 and the synchronous plate 610 are connected by a threaded sleeve, causing the synchronous plate 610 to move towards the position switch 67 until the synchronous plate 610 presses against the position switch 67. The position switch 67 gives a feedback signal to the PLC controller 8, and the PLC controller 8 controls the electric lifting rod 21 to stop pushing. It also sends a warning signal to the receiving terminal of the staff, indicating that under the current wind conditions, the electric lifting rod 21 can push the detection shell 22 to the maximum height. Continuing to increase the height may cause the entire detection device to tip over. Automatic monitoring provides better protection.

[0029] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A portable negative oxygen ion detection device, comprising a base (1), characterized in that, Also includes: The testing mechanism (2) is fixedly installed on the upper end of the base (1); The wind direction monitoring feedback adjustment mechanism (3) is rotatably connected to the top of the detection mechanism (2); The wind force monitoring feedback adjustment mechanism (4) is fixedly installed on the detection mechanism (2); An air intake mode conversion mechanism (5) is fixedly connected to the air intake end of the detection mechanism (2); The height adjustment mechanism (6) is fixedly installed on the upper end of the base (1); The PLC controller (8) is fixedly installed in the detection mechanism (2) and is electrically connected to the wind direction monitoring feedback adjustment mechanism (3), the wind force monitoring feedback adjustment mechanism (4), the air intake mode conversion mechanism (5), and the lifting height threshold self-adjustment mechanism (6).

2. The portable negative oxygen ion detection device according to claim 1, characterized in that, The detection mechanism (2) includes four electric lifting rods (21) symmetrically fixedly connected to the upper end of the base (1). The upper moving ends of the four electric lifting rods (21) are fixedly connected to the same detection shell (22). A negative oxygen ion detector (23) and a storage battery (24) are fixedly installed inside the detection shell (22). An air inlet pipe (25) is rotatably sleeved on the top of the detection shell (22). The lower end of the air inlet pipe (25) extends through into the detection shell (22) and is rotatably connected to the air inlet of the negative oxygen ion detector (23) through a rotary sealing joint. A motor rotating assembly (26) for driving the air inlet pipe (25) to rotate is fixedly installed on the top of the inner wall of the detection shell (22).

3. The portable negative oxygen ion detection device according to claim 2, characterized in that, The wind direction monitoring feedback adjustment mechanism (3) includes a rotating cylinder (31) rotatably connected to the top of the detection housing (22) via a bearing. The rotating cylinder (31) is rotatably sleeved outside the air inlet pipe (25). A wind vane (32) is fixedly installed on the rotating cylinder (31). A proximity switch (33) is fixedly inserted into the cylinder wall of the rotating cylinder (31). The air inlet pipe (25) is located inside the rotating cylinder (31) and is fixedly connected to a sensing metal rod (34) that corresponds to the position of the proximity switch (33).

4. A portable negative oxygen ion detection device according to claim 2, characterized in that, The wind force monitoring feedback adjustment mechanism (4) includes a feedback shell (41) fixedly installed on the air inlet pipe (25). A plurality of insertion holes are provided on one side wall of the feedback shell (41), and a plurality of force rods (42) are arranged side by side in the corresponding insertion holes. The ends of the plurality of force rods (42) located outside the feedback shell (41) are fixedly connected to the same force plate (43), and the ends of the plurality of force rods (42) located inside the feedback shell (41) are fixedly connected to the same feedback seat (44). Multiple compensating springs (45) sleeved on the outside of the force rod (42) are fixedly connected to the opposite side of the feedback seat (44) and the feedback shell (41). A feedback resistor rod (46) arranged parallel to the force rod (42) is fixedly installed on the inner wall of the feedback shell (41). A feedback conductive contact piece (47) that is electrically in contact with the feedback resistor rod (46) is fixedly connected to one side of the feedback seat (44). A laser rangefinder (48) arranged opposite to the feedback seat (44) is fixedly inserted at the rear end of the feedback shell (41).

5. A portable negative oxygen ion detection device according to claim 2, characterized in that, The air intake mode conversion mechanism (5) includes a fixed plate (51) fixedly installed at the end of the air intake pipe (25), a connecting frame (52) rotating on the fixed plate (51), a motor drive assembly (53) for driving the connecting frame (52) to rotate fixedly installed on the fixed plate (51), an active suction hood (54) and an air guide hood (55) fixedly connected to both ends of the connecting frame (52), an exhaust fan (56) fixedly installed inside the active suction hood (54), and an air intake volume control mechanism (7) installed inside the front end of the air guide hood (55).

6. A portable negative oxygen ion detection device according to claim 1, characterized in that, The height adjustment mechanism (6) includes an adjustment shell (61). Multiple positioning slide rods (62) arranged side-by-side are fixedly connected to the upper inner wall of the adjustment shell (61). A sliding plate (63) is slidably sleeved around each of the multiple positioning slide rods (62). Multiple return springs (64) sleeved around the positioning slide rods (62) are fixedly connected to the opposite side of the sliding plate (63) and the adjustment shell (61). A thrust permanent magnet plate (65) is fixedly connected to the side wall of the sliding plate (63). A thrust permanent magnet plate is fixedly installed on the inner wall of the adjustment shell (61). (65) A thrust electromagnetic plate (66) is arranged opposite to the sliding plate (63) away from the thrust permanent magnet plate (65) and a position switch (67) is fixedly installed on the side wall. The lower inner wall of the adjusting shell (61) is also rotatably connected to a synchronous screw (68) arranged parallel to the positioning slide rod (62). A synchronous motor (69) for driving the synchronous screw (68) to rotate is fixedly installed on the outer wall of the adjusting shell (61). A synchronous plate (610) is threaded onto the rod wall of the synchronous screw (68). The synchronous plate (610) is arranged opposite to the position switch (67).

7. A portable negative oxygen ion detection device according to claim 5, characterized in that, The air intake control mechanism (7) includes multiple air guide plates (72) rotatably connected to the front end of the inner wall of the air guide shroud (55) via deflection shafts (71). One end of the deflection shaft (71) extends through the air guide shroud (55) and is fixedly connected to a transmission gear (73). The outer wall of the air guide shroud (55) is fixedly fitted with a mounting shell (74) that covers the multiple transmission gears (73). The inner wall of the mounting shell (74) is slidably connected to a transmission rack (75) that meshes with the multiple transmission gears (73). The upper end of the transmission rack (75) is fixedly connected to... An insulating plate (76) is attached, and a magnetic permanent magnet plate (77) is fixedly installed on the upper end of the insulating plate (76). A magnetic electromagnetic plate (78) is fixedly installed on the top of the inner wall of the mounting shell (74) and is arranged opposite to the magnetic permanent magnet plate (77). A limit slide rod (79) is fixedly connected to the lower end of the transmission rack (75). The lower end of the limit slide rod (79) extends through the lower end of the mounting shell (74). A pull-down spring (710) sleeved on the limit slide rod (79) is fixedly connected to the lower end of the transmission rack (75) and the bottom of the inner wall of the mounting shell (74).

8. A portable negative oxygen ion detection device according to claim 1, characterized in that, The base (1) has four U-shaped locking plates (9) symmetrically fitted on its outer side. The lower end of the U-shaped locking plate (9) is fixedly equipped with a universal roller (10). The U-shaped locking plate (9) and the base (1) are detachably connected by bolts.

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