A method for synchronously measuring track vibration, building vibration and secondary noise

Abstract

The present invention provides a method for synchronously measuring track vibration, building vibration, and secondary noise. The method comprises the following steps: installing data acquisition systems at predetermined measurement points on the track and on each building; providing a time calibration information receiving device on each data acquisition system; receiving time calibration information via the time calibration information receiving device, and performing real-time time calibration of the data acquisition system based on the time calibration information. Application of the present invention eliminates the unidentified phase difference between track vibration data and building vibration and noise data measured in the prior art, achieving time synchronization between track vibration data and building vibration and noise data measured during rail transit.

Description

Technical Field

[0001] The present application relates to the field of rail transportation technology, and in particular to a method for synchronously measuring rail vibration, building vibration and secondary noise. Background Art

[0002] The vibration and secondary noise caused by urban rail transit are currently hot topics in the rail transit industry. The powerful dynamics of the tracks cause vibrations in surrounding buildings, which in turn generate secondary structure-borne noise, disrupting residents' rest.

[0003] In existing technology, measuring track vibration typically involves installing sensors on the track during train operation hours and using offline sampling to collect track vibration data generated during train operation. Measuring building vibration and secondary noise, on the other hand, typically involves directly entering a building during train operation to collect data. Furthermore, measuring track vibration, building vibration, and secondary noise typically involves simultaneously sampling track offline and ground-based building vibration and secondary noise. Although track vibration and building vibration and secondary noise measurements are objectively performed during the same time period, the sampled vibration data exhibit an unknown phase difference, resulting in a time asynchrony between the track vibration data and the building vibration and secondary noise data, making point-to-point time-frequency analysis impossible.

[0004] In summary, since the methods of measuring track vibration, building vibration and secondary noise in the existing technology have the shortcomings as mentioned above, how to propose a better method for synchronously measuring track vibration, building vibration and secondary noise to eliminate the unclear phase difference between the track vibration data and building vibration data measured in the existing technology and achieve the time synchronization of track vibration data, building vibration and secondary noise data in rail transit is a problem that urgently needs to be solved in this field. Summary of the Invention

[0005] In view of this, the present invention provides a method for synchronously measuring track vibration and building vibration, thereby eliminating the unclear phase difference between the track vibration data and the building vibration data measured in the prior art, and realizing the temporal synchronization of the track vibration data and the building vibration data in rail transit.

[0006] The technical solution of the present invention is specifically achieved as follows:

[0007] A method for synchronously measuring track vibration, building vibration and secondary noise, characterized by comprising the following steps:

[0008] Step A, setting up data acquisition systems at preset measuring points on the track and each building;

[0009] Step B, respectively setting a time calibration information receiving device on each data acquisition system;

[0010] Step C: receiving the time calibration information through the time calibration information receiving device, and performing real-time calibration on the time of the data acquisition system according to the time calibration information.

[0011] Preferably, each data acquisition system includes: multiple sensors and a data acquisition instrument; the multiple sensors are respectively arranged at preset vibration and secondary noise measurement locations, for measuring and sending vibration and secondary noise information at the corresponding locations, and a data acquisition instrument is respectively connected to the multiple sensors, for receiving the vibration and secondary noise information measured and sent by each sensor.

[0012] Preferably, the sensor includes a vibration sensor and / or a noise sensor.

[0013] Preferably, the step A comprises the following steps:

[0014] Step A1: pre-set rail measuring points, trackbed measuring points, and structure measuring points on the track, and respectively set vibration sensors at the rail measuring points, trackbed measuring points, and structure measuring points;

[0015] Step A2: connecting the vibration sensors at the rail measuring points, the trackbed measuring points, and the structure measuring points to the same data acquisition instrument to form a track data acquisition system;

[0016] Step A3: pre-set ground measurement points, indoor measurement points, and noise measurement points in each building along the route, and respectively install vibration sensors and noise sensors at the ground measurement points, indoor measurement points, and noise measurement points;

[0017] In step A4, the vibration sensors and noise sensors at the ground measurement points, indoor measurement points and noise measurement points in the same building are connected to the same data acquisition instrument to form a building data acquisition system.

[0018] Preferably, the time calibration information receiving device is connected to each data acquisition instrument via an interface.

[0019] Preferably, the time calibration information receiving device is a GPS antenna device.

[0020] Preferably, the time calibration information sending device is a GPS satellite.

[0021] Preferably, for underground tracks, the track data acquisition system installs a time calibration information receiving device outside a nearby station, which is connected to the data acquisition instrument via a long wire for signal transmission.

[0022] As can be seen from the above, in the method for synchronously measuring track vibration and building vibration in the present invention, by setting vibration and / or noise sensors, data acquisition instruments and time calibration information receiving devices, the unknown phase difference between the track vibration data and the building vibration and noise data measured in the prior art can be eliminated, thereby realizing the time synchronization of the track vibration data and the building vibration and noise data measured in rail transit. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 The figure is a flow chart of the method for synchronously measuring track vibration, building vibration and secondary noise in the present invention.

[0024] Figure 2 Schematic diagram of a track data acquisition system in an embodiment of the present invention.

[0025] Figure 3 Schematic diagram of a building vibration and secondary noise data acquisition system in an embodiment of the present invention.

[0026] Figure 4 Schematic diagram of synchronous measurement of track vibration, building vibration and secondary noise in an embodiment of the present invention. DETAILED DESCRIPTION

[0027] In order to make the technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0028] Figure 1 The figure is a flow chart of a method for synchronously measuring track vibration, building vibration and secondary noise in an embodiment of the present invention.

[0029] like Figure 1 As shown, the method for synchronously measuring track vibration and building vibration in an embodiment of the present invention includes the following steps:

[0030] Step 101, setting up data acquisition systems at preset measuring points on the track and each building;

[0031] Step 102, respectively setting a time calibration information receiving device on each data acquisition system;

[0032] Step 103: receiving the time calibration information through the time calibration information receiving device, and performing real-time calibration on the time of the data acquisition system according to the time calibration information.

[0033] In the technical solution of the present invention, multiple implementation methods can be used to implement the above-mentioned method of synchronously measuring track vibration, building vibration and secondary noise. The following will use one of the implementation methods as an example to introduce the technical solution of the present invention in detail.

[0034] For example, preferably, in a specific embodiment of the present invention, each data acquisition system may include: multiple sensors and a data acquisition instrument; the multiple sensors are respectively arranged at preset vibration and secondary noise measurement locations, for measuring and sending vibration and secondary noise information at the corresponding locations, and a data acquisition instrument is respectively connected to the multiple sensors, for receiving the vibration and secondary noise information measured and sent by each sensor.

[0035] Preferably, the sensor may include a vibration sensor and / or a noise sensor.

[0036] For another example, preferably, in a specific embodiment of the present invention, step 101 may include the following steps:

[0037] Step 11: pre-set rail measuring points, trackbed measuring points, and structure measuring points on the track, and respectively set vibration sensors at the rail measuring points, trackbed measuring points, and structure measuring points;

[0038] Step 12: connecting the vibration sensors at the rail measuring points, the trackbed measuring points, and the structure measuring points to the same data acquisition instrument to form a track data acquisition system;

[0039] Step 13: pre-set ground measurement points, indoor measurement points, and noise measurement points in each building along the route, and respectively set vibration sensors and noise sensors at the ground measurement points, indoor measurement points, and noise measurement points;

[0040] Step 14, connecting the vibration sensors and noise sensors at the ground measurement points, indoor measurement points and noise measurement points in the same building to the same data acquisition instrument to form a building data acquisition system;

[0041] Reference Figures 2 to 3 By respectively setting vibration sensors at multiple preset measuring points on the track and connecting the vibration sensors at each measuring point to the same data collector, a track data collection system is formed on the track. The vibration sensors can measure vibration data at the corresponding measuring points and send the vibration data to the connected data collector, thereby simultaneously measuring vibration data at each measuring point on the track. By respectively setting vibration sensors and noise sensors at multiple preset measuring points in a building near the track and connecting the vibration sensors and noise sensors in the same building to the same data collector, a building data collection system is formed in the building. The vibration sensors and noise sensors can measure vibration and noise data at the corresponding measuring points and send the vibration and noise data to the connected data collector, thereby simultaneously measuring vibration and noise data at each measuring point in the building.

[0042] Preferably, the number of data acquisition systems can be set according to actual needs.

[0043] Preferably, the positions and numbers of the measuring points can also be set according to actual needs.

[0044] In addition, as an example, in a preferred embodiment of the present invention, the time calibration information receiving device is connected to each data acquisition instrument via an interface.

[0045] Preferably, the time calibration information receiving device may be a GPS antenna device, such as a timing-type GPS satellite receiver.

[0046] Furthermore, as an example, in a preferred embodiment of the present invention, the time calibration information receiving device can receive time calibration information sent by the time calibration information sending device and perform real-time calibration of the data acquisition system's time based on the time calibration information. By using the time calibration information sending device to synchronize the time calibration information receiving device with a high-precision time standard, and the time calibration information receiving device to calibrate the measurement time of each data acquisition system in real time, each data acquisition system can achieve synchronized measurement of vibration data and noise.

[0047] Preferably, the time calibration information sending device may be a GPS satellite.

[0048] like Figure 4 As shown, by utilizing the high-precision time standard provided by GPS satellites for time synchronization, the GPS antenna device obtains the standard time signal from the satellite in real time. The GPS antenna device is connected to a data acquisition instrument via an interface, and the GPS antenna device can transmit the standard time signal to the data acquisition instrument through the interface, thereby calibrating the time of each data acquisition instrument in real time and achieving time synchronization of each data acquisition instrument. Different data acquisition instruments simultaneously receive vibration or secondary noise data measured by sensors at various measurement points connected to them. Therefore, the data acquisition system can achieve synchronous measurement of vibration data or secondary noise data at different locations, eliminating the unknown phase difference between track vibration data and building vibration and noise data measured in the prior art, and achieving time synchronization of track vibration data and building vibration and noise data measured in rail transit.

[0049] In addition, as an example, in a preferred specific embodiment of the present invention, for underground tracks, the track data acquisition system can install a time calibration information receiving device outside a station that is relatively close, and connect it to the data acquisition instrument through a long wire with better signal transmission.

[0050] Because GPS signals are stronger in open air and weaker in covered areas, and there's virtually no signal in tunnels, it's relatively easy to place GPS antennas outdoors on elevated tracks and buildings, and also on underground buildings. However, it's not easy to do so on underground tracks. Therefore, a GPS antenna can be installed outside a station close to the track measurement point and connected to the data acquisition instrument via a long wire that provides better signal transmission. This also places the GPS antenna outdoors, ensuring a stable GPS signal.

[0051] To sum up, in the technical solution of the present invention, due to the provision of multiple sensors, data acquisition instruments and time calibration information receiving devices, multiple sensors can simultaneously acquire vibration and noise data of different measuring points, and the data acquisition instrument can obtain the time signal of the time calibration information sending device through the time calibration information receiving device, calibrate the time of each data acquisition instrument, thereby realizing the synchronous measurement of vibration data and secondary noise data at different locations, eliminating the unknown phase difference between the track vibration data and the building vibration and noise data measured in the prior art, realizing the time synchronization of the track vibration data and the building vibration and noise data measured in rail transit, and making point-to-point time-frequency analysis and transfer analysis feasible.

[0052] 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 in the scope of protection of the present invention.

Claims

1. A method for synchronously measuring track vibration, building vibration and secondary noise, characterized in that: The steps include: Step A, setting up data acquisition systems at preset measuring points on the track and each building; Step B, respectively setting a time calibration information receiving device on each data acquisition system; Step C, receiving the time calibration information through the time calibration information receiving device, and calibrating the time of the data acquisition system in real time according to the time calibration information; Each data acquisition system includes: a plurality of sensors and a data acquisition instrument; the plurality of sensors are respectively arranged at predetermined vibration and secondary noise measurement locations, and are used to measure and transmit vibration and secondary noise information at the corresponding locations; a data acquisition instrument is respectively connected to the plurality of sensors, and is used to receive the vibration and secondary noise information measured and transmitted by each sensor; Wherein, the step A comprises the following steps: Step A1: pre-set rail measuring points, trackbed measuring points, and structure measuring points on the track, and respectively set vibration sensors at the rail measuring points, trackbed measuring points, and structure measuring points; Step A2: connecting the vibration sensors at the rail measuring points, the trackbed measuring points, and the structure measuring points to the same data acquisition instrument to form a track data acquisition system; Step A3: pre-set ground measurement points, indoor measurement points, and noise measurement points in each building along the route, and respectively install vibration sensors and noise sensors at the ground measurement points, indoor measurement points, and noise measurement points; In step A4, the vibration sensors and noise sensors at the ground measurement points, indoor measurement points and noise measurement points in the same building are connected to the same data acquisition instrument to form a building data acquisition system.

2. The method according to claim 1, characterized in that The sensor includes a vibration sensor and / or a noise sensor.

3. The method according to claim 1, characterized in that The time calibration information receiving device is connected to each data acquisition instrument via an interface.

4. The method according to claim 1, wherein The time calibration information receiving device is a GPS antenna device.

5. The method according to claim 4, characterized in that The time calibration information sending device is a GPS satellite.

6. The method according to claim 1, characterized in that For underground tracks, the track data acquisition system installs a time calibration information receiving device outside a nearby station and connects it to the data acquisition instrument via a long wire for signal transmission.

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