An overhead line noise source intensity measuring device

Abstract

The application provides an overhead line noise source intensity measuring device, which comprises a moving trolley, a first lifting mechanism, a second lifting mechanism, a collection instrument, a mobile power supply, a noise sensor, a supporting mechanism and a control system, wherein the collection instrument, the mobile power supply and the control system are installed in the moving trolley, the first lifting mechanism is arranged on the moving trolley, the second lifting mechanism is arranged on the first lifting mechanism, the noise sensor is arranged on the second lifting mechanism, the supporting mechanism is arranged on the moving trolley, and the moving trolley, the first lifting mechanism, the second lifting mechanism, the collection instrument, the mobile power supply and the noise sensor are electrically connected with the control system.

Description

Technical Field

[0001] This invention relates to the field of overhead power line noise source intensity measurement technology, and in particular to an overhead power line noise source intensity measurement device. Background Technology

[0002] Currently, the measurement environment for subway vibration and noise source intensity can be roughly divided into three types: ground line measurement, elevated line measurement, and underground line measurement. For elevated line measurement, the commonly used method is to connect different equipment such as data acquisition instruments, power supplies, cables, and sensors on-site for on-site measurement.

[0003] Currently, traditional measurement methods require finding a suitable location, fixing the sensor to the telescopic pole, connecting the data acquisition device to the charger, and then connecting the data acquisition device to the sensor via a connecting cable. If multiple sensors need to be installed, the on-site installation is quite cumbersome, and the connecting cables are piled up and messy, which is not conducive to the on-site testing work. In addition, the equipment is exposed to the outside, which can also damage the data acquisition device.

[0004] The current problems with noise measurement of elevated power lines are as follows: ① Limited bracket compatibility: Existing foldable floor brackets can only be adapted to conventional flat installation scenarios. They cannot find suitable measurement locations for overhead line noise measurement, which will cause deviations in data collection.

[0005] ② The existing equipment and instruments are numerous, heavy, and mostly lack protective design. The power interfaces are mostly exposed without protection, and the protection level of the data acquisition instrument shell is generally IP30 (only to prevent solid foreign objects from entering). They are placed randomly on the ground.

[0006] ③ According to the "Technical Guidelines for Environmental Impact Assessment of Urban Rail Transit" (HJ453-2018), for trackside noise measurement points, for bridges with baffle structures on both sides, the microphone should be placed at a horizontal distance of 7.5m from the centerline of the adjacent traffic line and 5m above the top surface of the rail; for bridges without baffle structures on both sides, the microphone should be placed at a horizontal distance of 7.5m from the centerline of the adjacent traffic line and 3.5m above the top surface of the rail. If there are obstacles such as trees or cables at the specified location, traditional measurement methods cannot fix the telescopic pole, resulting in measurement data that does not meet the specifications. Therefore, it is necessary to relocate the measurement site, increasing the workload.

[0007] ④ At present, there are many instruments and equipment used in the noise testing of subway elevated roads, and a lot of manpower is required in the actual operation process. Summary of the Invention

[0008] The technical problem to be solved by the present invention is to provide a device for measuring the noise source intensity of overhead lines, which addresses the shortcomings of the prior art.

[0009] The technical solution of the present invention to solve the above-mentioned technical problems is as follows: A noise source intensity measuring device for elevated lines, comprising: a mobile trolley, a first lifting mechanism, a second lifting mechanism, a data acquisition instrument, a mobile power supply, a noise sensor, a support mechanism, and a control system. The data acquisition instrument, the mobile power supply, and the control system are all installed in the mobile trolley. The first lifting mechanism is disposed on the mobile trolley, the second lifting mechanism is disposed on the first lifting mechanism, the noise sensor is disposed on the second lifting mechanism, and the support mechanism is disposed on the mobile trolley. The mobile trolley, the first lifting mechanism, the second lifting mechanism, the data acquisition instrument, the mobile power supply, and the noise sensor are all electrically connected to the control system.

[0010] The beneficial effects of adopting the technical solution of this invention are that it integrates the data acquisition instrument, power supply, and other equipment into a mobile trolley, eliminating the need for on-site connections. The first lifting mechanism can precisely extend to the specified position, ensuring compliance from a structural design perspective. The second lifting mechanism can extend the telescopic rod to the specified position for measurement. A mobile power supply powers the entire device, enabling forward, backward, upward, downward, unfolding, and retraction movements. Powering the data acquisition instrument and other equipment eliminates the limitations of generators and cables, saving significant manpower.

[0011] Furthermore, the top of the second lifting mechanism is equipped with an anemometer for recording on-site wind speed, a camera for recording train passing time and speed, observing ground traffic and pedestrian flow, and a temperature sensor for recording temperature. The anemometer, the camera, and the temperature sensor are all electrically connected to the control system.

[0012] The beneficial effects of adopting the above-mentioned further technical solutions are that the anemometer is responsible for recording the on-site wind speed and subsequently correcting the wind speed propagation model; the camera records the train's passing time and speed, and can also observe the ground traffic flow and pedestrian flow, and classify background noise; the temperature sensor records the temperature, which mainly affects the air speed of sound and the sound attenuation coefficient.

[0013] Furthermore, an automatically opening and closing equipment box is installed on the top of the first lifting mechanism, and the second lifting mechanism is rotatably installed in the equipment box. The equipment box is electrically connected to the control system. A laser indicator for positioning the rail surface is provided on the equipment box, and the laser indicator is electrically connected to the control system.

[0014] The beneficial effect of adopting the above-mentioned further technical solution is that the top noise sensor and camera are placed horizontally in the equipment box when not in use, and the equipment box automatically opens when in use. When the lifting mechanism is raised, the laser pointer accurately positions the rail surface, and then the telescopic rod rises to perform the measurement. The single second lifting mechanism supports extension and pitch adjustment, and the height and angle of the second lifting mechanism can be adjusted simultaneously.

[0015] Furthermore, the mobile trolley includes: a frame, a drive wheel, a rotating shaft, and a motor. The rotating shaft is rotatably mounted on the frame, the drive wheel is mounted on the rotating shaft, the motor is mounted on the frame, the motor is connected to the rotating shaft via a belt, and the motor is electrically connected to the control system.

[0016] The beneficial effects of adopting the above-mentioned further technical solution are that the power supply powers the motor, which drives the belt to move the rear wheel of the main body. The structure is simple, easy to install and maintain, and reduces costs.

[0017] Furthermore, the support mechanism includes: multiple support legs and multiple hydraulic rods. The multiple support legs are installed on the periphery of the mobile trolley, and the multiple hydraulic rods are respectively connected to the multiple support legs. Each of the multiple support legs is equipped with a gyroscope, and each of the multiple hydraulic rods is equipped with a pressure sensor. The multiple hydraulic rods, the multiple pressure sensors, and the multiple gyroscopes are all electrically connected to the control system.

[0018] The beneficial effect of adopting the above-mentioned further technical solution is that the equipment is equipped with support legs on both the left and right sides of the bottom. After the support legs are extended, the hydraulic rods will lift the entire structure off the ground. The cooperation between the support legs and the hydraulic rods can achieve multi-angle self-adaptation. The support legs can be freely extended and retracted via electric buttons. Each hydraulic rod is equipped with a pressure sensor to ensure that each support leg can automatically stop when it is in close contact with the ground. When measuring complex environments, there is no need to precisely adjust the angle. Simply press the support leg control button to extend it. The built-in gyroscope monitors the extension of the four support legs and adjusts the horizontal state in real time. The four support legs will automatically find the optimal angle and lock.

[0019] Furthermore, the mobile vehicle is equipped with a self-test module for detecting the power of the mobile power supply, the status of the noise sensor, and the communication connection. The self-test module is electrically connected to the data acquisition instrument and the control system, respectively.

[0020] The beneficial effects of adopting the above-mentioned further technical solutions are that the self-test module built into the data acquisition instrument automatically monitors upon startup to ensure the normal and stable operation of the system, and the monitoring results and noise data are transmitted to the background system in real time via 5G, allowing a single person to complete the on-site deployment work.

[0021] Furthermore, the control system is equipped with a remote wireless transmission module and a storage module. The storage module is electrically connected to the remote wireless transmission module, and the remote wireless transmission module is wirelessly connected to a backend system.

[0022] The beneficial effects of adopting the above-mentioned further technical solutions are that the on-site situation is recorded by instruments such as cameras, the anemometer is responsible for recording the on-site wind speed and subsequently correcting the wind speed propagation model, the camera records the train passing time, and the train speed can also be recorded to observe the traffic flow and pedestrian flow on the ground and classify background noise; the temperature sensor records the temperature, which mainly affects the air sound speed and sound attenuation coefficient, reducing the workload of personnel recording.

[0023] Furthermore, a side compartment is provided on one side of the mobile trolley; a cable reel is provided on the mobile trolley, and cables are provided on the cable reel, with the two ends of the cables being electrically connected to the data acquisition instrument and the noise sensor, respectively.

[0024] The beneficial effect of adopting the above-mentioned further technical solution is that other materials can be placed in the side compartment. The cable is fixed on the cable reel. Before use, connect one end of the cable to the sensor and the other end to the data acquisition unit. The data acquisition unit and power supply are placed below the control panel.

[0025] Furthermore, the second lifting mechanism is provided with a quick-connect interface, and the noise sensor is detachably installed in the quick-connect interface; the mobile trolley is provided with a control panel, the control panel is provided with multiple buttons, all of which are electrically connected to the control system, and the interface of the control panel is provided with a sealing ring.

[0026] The beneficial effects of adopting the above-mentioned further technical solution are that all interfaces of the control panel are equipped with nitrile rubber sealing rings, achieving an IP54 protection level; and all are placed in the space below the control panel. The connecting cables of noise sensors, cameras, etc., are connected to the data acquisition instrument through a cable harness, improving sealing, stability, and reliability. The top of the second lifting mechanism is equipped with a BNC standardized interface, allowing the noise sensor to be directly plugged in and replaced without additional wiring.

[0027] Furthermore, both the first lifting mechanism and the second lifting mechanism are lifting mechanisms with self-locking function; the first lifting mechanism is provided with a first stepper motor, and the second lifting mechanism is provided with a second stepper motor, both of which are electrically connected to the control system.

[0028] The beneficial effect of adopting the above-mentioned further technical solution is that the extension and retraction stroke of the telescopic rod is precisely controlled by a stepper motor, and the sensor can be adjusted to a compliant position of ±2cm flush with the rail surface according to the height of the positioning rail surface by the laser indicator.

[0029] The advantages of additional aspects of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0030] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is one of the structural schematic diagrams of the overhead line noise source intensity measuring device provided in an embodiment of the present invention.

[0032] Figure 2 This is the second schematic diagram of the structure of the overhead line noise source intensity measuring device provided in the embodiment of the present invention.

[0033] Figure 3 The third schematic diagram of the structure of the overhead line noise source intensity measuring device provided in the embodiment of the present invention.

[0034] Figure 4 The fourth schematic diagram of the structure of the overhead line noise source intensity measuring device provided in the embodiment of the present invention.

[0035] The following are the reference numerals: 1. Mobile trolley; 2. First lifting mechanism; 3. Second lifting mechanism; 4. Data acquisition device; 5. Mobile power supply; 6. Noise sensor; 7. Support mechanism; 8. Laser pointer; 9. Drive wheel; 10. Motor; 11. Support leg; 12. Hydraulic rod; 13. Cable reel; 14. Control panel. Detailed Implementation

[0036] The principles and features of the present invention are described below with reference to the accompanying drawings. The embodiments described are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0037] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0038] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0039] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0040] In the description of the embodiments of the present invention, it should be noted that if terms such as "upper", "lower", "horizontal", "inner" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the invention is usually placed during use, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0041] In the description of the embodiments of the present invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention according to the specific circumstances.

[0042] like Figures 1 to 4 As shown in the figure, this embodiment of the invention provides a noise source intensity measurement device for overhead power lines, including: a mobile trolley 1, a first lifting mechanism 2, a second lifting mechanism 3, a data acquisition instrument 4, a mobile power supply 5, a noise sensor 6, a support mechanism 7, and a control system. The data acquisition instrument 4, the mobile power supply 5, and the control system are all installed in the mobile trolley 1. The first lifting mechanism 2 is disposed on the mobile trolley 1, the second lifting mechanism 3 is disposed on the first lifting mechanism 2, the noise sensor 6 is disposed on the second lifting mechanism 3, and the support mechanism 7 is disposed on the mobile trolley 1. The mobile trolley 1, the first lifting mechanism 2, the second lifting mechanism 3, the data acquisition instrument 4, the mobile power supply 5, and the noise sensor 6 are all electrically connected to the control system.

[0043] The beneficial effects of adopting the technical solution of this invention are that it integrates the data acquisition instrument, power supply, and other equipment into a mobile trolley, eliminating the need for on-site connections. The first lifting mechanism can precisely extend to the specified position, ensuring compliance from a structural design perspective. The second lifting mechanism can extend the telescopic rod to the specified position for measurement. A mobile power supply powers the entire device, enabling forward, backward, upward, downward, unfolding, and retraction movements. Powering the data acquisition instrument and other equipment eliminates the limitations of generators and cables, saving significant manpower.

[0044] Furthermore, the top of the second lifting mechanism 3 is equipped with an anemometer for recording the wind speed on site, a camera for recording the train's passing time and speed, observing the traffic flow and pedestrian flow on the ground, and a temperature sensor for recording the temperature. The anemometer, the camera, and the temperature sensor are all electrically connected to the control system.

[0045] The beneficial effects of adopting the above-mentioned further technical solutions are that the anemometer is responsible for recording the on-site wind speed and subsequently correcting the wind speed propagation model; the camera records the train's passing time and speed, and can also observe the ground traffic flow and pedestrian flow, and classify background noise; the temperature sensor records the temperature, which mainly affects the air speed of sound and the sound attenuation coefficient.

[0046] The anemometer, camera, and temperature sensor are connected to the telescopic rod (second lifting mechanism) using a quarter-threaded hole.

[0047] Multiple second lifting mechanisms can be used to facilitate the installation of other components. A single telescopic rod (second lifting mechanism) supports extension and pitch adjustment.

[0048] like Figures 1 to 4 As shown, the first lifting mechanism 2 is further equipped with an automatically opening and closing equipment box on its top, and the second lifting mechanism 3 is rotatably installed in the equipment box. The equipment box is electrically connected to the control system. The equipment box is provided with a laser indicator 8 for positioning the rail surface, and the laser indicator 8 is electrically connected to the control system.

[0049] The beneficial effect of adopting the above-mentioned further technical solution is that the top noise sensor and camera are placed horizontally in the equipment box when not in use, and the equipment box automatically opens when in use. When the lifting mechanism is raised, the laser pointer accurately positions the rail surface, and then the telescopic rod rises to perform the measurement. The single second lifting mechanism supports extension and pitch adjustment, and the height and angle of the second lifting mechanism can be adjusted simultaneously.

[0050] like Figures 1 to 4 As shown, the mobile trolley 1 further includes: a frame, a drive wheel 9, a rotating shaft, and a motor 10. The rotating shaft is rotatably mounted on the frame, the drive wheel 9 is mounted on the rotating shaft, the motor 10 is mounted on the frame, the motor 10 is connected to the rotating shaft via a belt, and the motor 10 is electrically connected to the control system.

[0051] The beneficial effects of adopting the above-mentioned further technical solution are that the power supply powers the motor, which drives the belt to move the rear wheel of the main body. The structure is simple, easy to install and maintain, and reduces costs.

[0052] like Figures 1 to 4As shown, the support mechanism 7 further includes: multiple support legs 11 and multiple hydraulic rods 12. The multiple support legs 11 are installed on the periphery of the mobile trolley 1, and the multiple hydraulic rods 12 are respectively connected to the multiple support legs 11. Each of the multiple support legs 11 is provided with a gyroscope, and each of the multiple hydraulic rods 12 is provided with a pressure sensor. The multiple hydraulic rods 12, the multiple pressure sensors, and the multiple gyroscopes are all electrically connected to the control system.

[0053] The beneficial effect of adopting the above-mentioned further technical solution is that the equipment is equipped with support legs on both the left and right sides of the bottom. After the support legs are extended, the hydraulic rods will lift the entire structure off the ground. The cooperation between the support legs and the hydraulic rods can achieve multi-angle self-adaptation. The support legs can be freely extended and retracted via electric buttons. Each hydraulic rod is equipped with a pressure sensor to ensure that each support leg can automatically stop when it is in close contact with the ground. When measuring complex environments, there is no need to precisely adjust the angle. Simply press the support leg control button to extend it. The built-in gyroscope monitors the extension of the four support legs and adjusts the horizontal state in real time. The four support legs will automatically find the optimal angle and lock.

[0054] like Figures 1 to 4 As shown, the mobile vehicle 1 is further equipped with a self-test module for detecting the power of the mobile power supply 5, the status of the noise sensor 6, and the communication connection. The self-test module is electrically connected to the data acquisition instrument 4 and the control system, respectively.

[0055] The beneficial effects of adopting the above-mentioned further technical solutions are that the self-test module built into the data acquisition instrument automatically monitors upon startup to ensure the normal and stable operation of the system, and the monitoring results and noise data are transmitted to the background system in real time via 5G, allowing a single person to complete the on-site deployment work.

[0056] The self-test module can be located next to the data acquisition unit and connected via cable. It can be operated on-site and transmit data remotely.

[0057] Furthermore, the control system is equipped with a remote wireless transmission module and a storage module. The storage module is electrically connected to the remote wireless transmission module, and the remote wireless transmission module is wirelessly connected to a backend system.

[0058] The beneficial effects of adopting the above-mentioned further technical solutions are that the on-site situation is recorded by instruments such as cameras, the anemometer is responsible for recording the on-site wind speed and subsequently correcting the wind speed propagation model, the camera records the train passing time, and the train speed can also be recorded to observe the traffic flow and pedestrian flow on the ground and classify background noise; the temperature sensor records the temperature, which mainly affects the air sound speed and sound attenuation coefficient, reducing the workload of personnel recording.

[0059] like Figures 1 to 4As shown, the mobile trolley 1 is further provided with a side compartment on one side; the mobile trolley 1 is provided with a cable reel 13, and the cable reel 13 is provided with a cable, the two ends of which are electrically connected to the data acquisition instrument 4 and the noise sensor 6 respectively.

[0060] The beneficial effect of adopting the above-mentioned further technical solution is that other materials can be placed in the side compartment. The cable is fixed on the cable reel. Before use, connect one end of the cable to the sensor and the other end to the data acquisition unit. The data acquisition unit and power supply are placed below the control panel.

[0061] like Figures 1 to 4 As shown, the second lifting mechanism 3 is further provided with a quick-connect interface, and the noise sensor 6 is detachably installed in the quick-connect interface; the mobile trolley 1 is provided with a control panel 14, the control panel 14 is provided with multiple buttons, all of which are electrically connected to the control system, and a sealing ring is provided at the interface of the control panel 14.

[0062] The beneficial effects of adopting the above-mentioned further technical solution are that all interfaces of the control panel are equipped with nitrile rubber sealing rings, achieving an IP54 protection level; and all are placed in the space below the control panel. The connecting cables of noise sensors, cameras, etc., are connected to the data acquisition instrument through a cable harness, improving sealing, stability, and reliability. The top of the second lifting mechanism is equipped with a BNC standardized interface, allowing the noise sensor to be directly plugged in and replaced without additional wiring.

[0063] like Figures 1 to 4 As shown, both the first lifting mechanism 2 and the second lifting mechanism 3 are lifting mechanisms with self-locking function; the first lifting mechanism 2 is provided with a first stepper motor, and the second lifting mechanism 3 is provided with a second stepper motor, both of which are electrically connected to the control system.

[0064] The beneficial effect of adopting the above-mentioned further technical solution is that the extension and retraction stroke of the telescopic rod is precisely controlled by a stepper motor, and the sensor can be adjusted to a compliant position of ±2cm flush with the rail surface according to the height of the positioning rail surface by the laser indicator.

[0065] This invention primarily focuses on optimizing the measurement of noise from overhead power lines.

[0066] ①In this invention, the data acquisition instrument, power supply and other equipment are integrated into the operating table (mobile trolley), eliminating the need for on-site connection.

[0067] ② The central telescopic rod (first lifting mechanism) of this invention can be precisely extended to a specified position, ensuring compliance from a structural design perspective. The top device of this invention is equipped with a telescopic rod (second lifting mechanism), which can extend to a specified position for measurement, and the top platform can be equipped with other devices such as anemometers, cameras, and temperature sensors.

[0068] The anemometer is responsible for recording the wind speed on site and subsequently correcting the wind speed propagation model. The camera records the train's passing time and speed, and can also observe the traffic and pedestrian flow on the ground, as well as classify background noise. The temperature sensor records the temperature, which mainly affects the air speed of sound and the sound attenuation coefficient.

[0069] ③ This invention integrates and simplifies a large number of on-site operations, eliminating the need for extensive on-site personnel. The self-test module (battery power, sensor status, communication connection) built into the device next to the data acquisition unit automatically monitors upon startup to ensure normal and stable system operation. Monitoring results and noise data are transmitted to the back-end system in real time via 5G, allowing a single person to complete the on-site deployment.

[0070] This invention integrates the data acquisition device, charger, motor, and other equipment into a single unit. The control panel features an open handle for easy transport and an opening for connecting a noise sensor cable and other top-mounted devices. Support legs are located on the left and right sides of the bottom of the unit, connected to the main body. When the support legs are extended, hydraulic rods lift the entire unit off the ground.

[0071] The support legs and hydraulic rods work together to achieve multi-angle adaptive design. The support legs can be freely extended and retracted via an electric button, and each hydraulic rod is equipped with a pressure sensor to ensure that each support leg automatically stops when it is in close contact with the ground.

[0072] The power supply powers the motor, which drives the belt to move the rear wheel and the main body. Other materials can be placed in the compartment on the other side.

[0073] The cable is fixed on the cable reel. Before use, connect one end of the cable to the sensor and the other end to the data acquisition unit. The data acquisition unit and power supply are located below the control panel. When not in use, the top noise sensor and camera are placed horizontally in the equipment box. When in use, the equipment box automatically opens, and when the support device rises, the laser pointer accurately positions the rail surface, and then the telescopic rod rises to perform the measurement.

[0074] Electric drive The entire device is powered by a portable power source, enabling it to move forward, backward, rise, fall, deploy, and retract. It powers the data acquisition unit and cameras, eliminating the need for generators and cables, and saving significant manpower.

[0075] Fixed installation design in complex environments Powering the entire device with a portable power bank, the device is transported to the vicinity of the test location. Once powered on, the motor is driven via a belt to the rear wheels using the "Forward / Reverse" button on the control panel, moving the entire device to the measurement location. The support legs are then deployed using the "Expand / Retract" button on the control panel, and the device is leveled and secured. The "Raise / Lower" button on the control panel allows for precise height adjustment, raising the top platform for measurement. Simultaneously, the top platform emits laser-assisted positioning, eliminating the need for manual transport. During deployment and raising, the site conditions are recorded by cameras and other instruments. An anemometer records the wind speed for subsequent adjustments to the wind speed propagation model. Cameras record train passage times and speeds, and also provide information on ground traffic and pedestrian flow, classifying background noise. Temperature sensors record temperature, which primarily affects airborne sound speed and sound attenuation coefficients, reducing the workload of manual recording. This system facilitates recording subway train passage times, aids in locating trains during single-vehicle data processing, and provides information on the test location, pedestrian and vehicle traffic, background noise composition, and weather conditions at the test location.

[0076] Subway elevated measurement device All interfaces on the control panel (such as BNC wiring ports and power interfaces) are equipped with nitrile rubber sealing rings, with a protection level of IP54; and they are all placed in the space below the control panel. The connection cables of noise sensors, cameras, etc. are connected to the data acquisition device through a cable harness.

[0077] Noise measurement Key technical principle: The top telescopic rod (second lifting mechanism) has a BNC standardized interface, allowing for direct plug-and-play replacement of noise sensors (such as the AWA14604 model) without additional wiring. The telescopic rod's extension and retraction stroke is precisely controlled by a stepper motor, and the sensor can be adjusted to a compliant position "flush with the rail surface ±2cm" based on the laser indicator's positioning of the rail surface height. Simultaneously, the camera and anemometer begin working, recording the on-site conditions.

[0078] For measurements in complex environments, precise angle adjustments are unnecessary. Simply press the support leg control button to extend the legs. The built-in gyroscope monitors the extension of the four support legs and adjusts the level in real time. The four support legs automatically find the optimal angle and lock in place. The built-in gyroscope monitors the extension of the four support legs and adjusts the level in real time.

[0079] The noise sensor has a positioning accuracy of ±2cm, which fully complies with the "Technical Specification for Environmental Vibration and Noise Control Engineering of Urban Rail Transit" (GB50868-2013), improving the compliance rate to 100% and avoiding measurement rework due to non-compliant location.

[0080] The original measurement required 3-4 people, but now only 1-2 people are needed to complete the work.

[0081] It facilitates on-site measurement; the equipment can be placed directly on-site, and the sensor only needs to be adjusted to the predetermined height.

[0082] It will not damage the site environment or affect the subway system.

[0083] This invention integrates the data acquisition device, charger, and other equipment into a single unit. An opening in the front of the control panel facilitates transport and provides an interface for installing a noise sensor. The bottom platform is equipped with support legs and hydraulic rods on both sides, allowing for multi-angle adaptive operation. The support legs can be freely extended and retracted via an electric button. Each hydraulic rod contains a pressure sensor to ensure that each support leg automatically stops when firmly connected to the ground. The "Up / Down" button on the control panel allows for precise height adjustment to raise the top platform to the rail surface level. Simultaneously, a laser indicator assists in locating the rail surface position, and a rear telescopic rod extends to provide sensor measurements.

[0084] Measurement steps Carry the device (overhead line noise source intensity measuring device) to the measuring point, unfold the bottom support legs by using the "support leg unfold / retract control button", and adjust the height by using the "hydraulic rod control button" to keep the equipment level.

[0085] Turn on the laser pointer, press the "Up / Down Control Button" to raise the top equipment platform to the specified height, start the telescopic rod (second lifting mechanism), and after reaching the height, the locking device locks the support rod, the motor automatically cuts off the power, and the horizontal fixation is completed.

[0086] Connect the noise sensor to the data acquisition unit via a BNC cable, with the cable introduced from the cable reel.

[0087] Press the "Top Telescopic Control Button" to enable extension and pitch adjustment of the single telescopic rod. The height and angle of the telescopic rod can be adjusted simultaneously to make the noise sensor (AWA14604 type) flush with the rail surface (error ±2cm).

[0088] Turn on the data acquisition device and charger, and after confirming that the sensor signal is normal, start the measurement.

[0089] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A device for measuring the noise source intensity of overhead power lines, characterized in that, include: The system includes a mobile trolley, a first lifting mechanism, a second lifting mechanism, a data acquisition device, a mobile power supply, a noise sensor, a support mechanism, and a control system. The data acquisition device, the mobile power supply, and the control system are all installed in the mobile trolley. The first lifting mechanism is mounted on the mobile trolley, the second lifting mechanism is mounted on the first lifting mechanism, the noise sensor is mounted on the second lifting mechanism, and the support mechanism is mounted on the mobile trolley. The mobile trolley, the first lifting mechanism, the second lifting mechanism, the data acquisition device, the mobile power supply, and the noise sensor are all electrically connected to the control system.

2. The overhead power line noise source intensity measuring device according to claim 1, characterized in that, The top of the second lifting mechanism is equipped with an anemometer for recording on-site wind speed, a camera for recording train passing time and speed, observing ground traffic and pedestrian flow, and a temperature sensor for recording temperature. The anemometer, the camera, and the temperature sensor are all electrically connected to the control system.

3. The overhead power line noise source intensity measuring device according to claim 1, characterized in that, The first lifting mechanism is equipped with an automatically opening and closing equipment box on its top, and the second lifting mechanism is rotatably installed in the equipment box. The equipment box is electrically connected to the control system. The equipment box is equipped with a laser indicator for locating the position of the rail surface, and the laser indicator is electrically connected to the control system.

4. The overhead power line noise source intensity measuring device according to claim 1, characterized in that, The mobile trolley includes a frame, drive wheels, a rotating shaft, and a motor. The rotating shaft is rotatably mounted on the frame, the drive wheels are mounted on the rotating shaft, the motor is mounted on the frame, the motor is connected to the rotating shaft via a belt, and the motor is electrically connected to the control system.

5. The overhead power line noise source intensity measuring device according to claim 1, characterized in that, The support mechanism includes: multiple support legs and multiple hydraulic rods. The multiple support legs are installed on the periphery of the mobile trolley, and the multiple hydraulic rods are respectively connected to the multiple support legs. Each of the multiple support legs is equipped with a gyroscope, and each of the multiple hydraulic rods is equipped with a pressure sensor. The multiple hydraulic rods, the multiple pressure sensors, and the multiple gyroscopes are all electrically connected to the control system.

6. The overhead power line noise source intensity measuring device according to claim 1, characterized in that, The mobile vehicle is equipped with a self-test module for detecting the power of the mobile power supply, the status of the noise sensor, and the communication connection. The self-test module is electrically connected to the data acquisition instrument and the control system, respectively.

7. The overhead power line noise source intensity measuring device according to claim 1, characterized in that, The control system is equipped with a remote wireless transmission module and a storage module. The storage module is electrically connected to the remote wireless transmission module, and the remote wireless transmission module is wirelessly connected to a back-end system.

8. The overhead power line noise source intensity measuring device according to claim 1, characterized in that, A side compartment is provided on one side of the mobile trolley; a cable reel is provided on the mobile trolley, and cables are provided on the cable reel, with the two ends of the cables being electrically connected to the data acquisition instrument and the noise sensor, respectively.

9. The overhead power line noise source intensity measuring device according to claim 1, characterized in that, The second lifting mechanism is provided with a quick-connect interface, and the noise sensor is detachably installed in the quick-connect interface; the mobile trolley is provided with a control panel, the control panel is provided with multiple buttons, all of which are electrically connected to the control system, and the interface of the control panel is provided with a sealing ring.

10. The overhead power line noise source intensity measuring device according to claim 1, characterized in that, Both the first lifting mechanism and the second lifting mechanism are lifting mechanisms with self-locking function; the first lifting mechanism is provided with a first stepper motor, and the second lifting mechanism is provided with a second stepper motor, both of which are electrically connected to the control system.

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