Automatic debugging device and method for high-speed maglev base station

Abstract

The invention discloses an automatic debugging device and method for a high-speed maglev base station, the automatic debugging device comprises a signal receiving device, automatic debugging software for the base station and an automatic control device for the base station, the automatic control device is firstly added into the base station, and a debugging worker carries the automatic debugging software and the signal receiving device to complete the measurement of the base station. Compared with an existing train-ground communication system debugging method, the method has the advantages that the debugging work process is simplified, the number of workers is reduced, the debugging work efficiency is improved, the safety of the workers is greatly guaranteed, debugging of an existing high-speed maglev train-ground communication system is simpler and more convenient, and the debugging efficiency is improved. When the base station of the high-speed maglev train-ground communication system is installed and maintained, base station debugging personnel can efficiently and quickly adjust the direction of the antenna, so that the antenna is more convenient in the maintenance process, and efficient equipment and technical support is provided for the maglev train-ground communication system.

Description

Technical Field

[0001] The invention belongs to the technical field of high-speed maglev vehicle-to-ground communication systems, and in particular relates to an automatic debugging device and method for a high-speed maglev base station. Background Art

[0002] Millimeter wave communication technology has the advantages of large capacity, good security and confidentiality, and high transmission quality, and can be used in various complex environments. At present, my country's high-speed maglev trains use millimeter wave communication technology to send train location, passenger information, voice, video and other data information to the ground. Since the wavelength of millimeter waves is much smaller than the size of nearby buildings, reflection or mirror reflection will occur. Therefore, during the transmission of millimeter wave signals, the on-board antenna will receive incident signals from all directions, and the synthesized multipath waves will experience slow and fast signal fading. The signal strength will fluctuate in a short period of time. Not only that, path loss will also affect the signal strength. In order to reduce the impact of the above problems, the base station needs to be debugged before the high-speed maglev train is put into operation.

[0003] Currently, spectrum analyzers are mainly used to debug high-speed maglev train base stations. At the ground base station, the staff adjusts the radiation direction of the base station antenna so that the antenna covers the entire track as much as possible; on the track, the staff uses a spectrum analyzer to pay attention to the base station field strength to maximize the field strength. During the debugging process, the ground staff needs to exchange information with the track staff, and the track staff needs to inform the ground staff of the field strength in real time so that the ground staff can perform accurate debugging. The information exchange methods for the two parties' staff include: using walkie-talkies, telephones, or using handheld devices that can view data remotely. The above debugging method has the following disadvantages:

[0004] 1. Time delay problem. When track staff use walkie-talkies and telephone equipment to convey field strength information to ground staff, due to the certain delay of walkie-talkies and telephone equipment, it is easy to cause repeated debugging, which is not conducive to debugging by ground staff.

[0005] 2. The problem of the number of staff. Although the use of handheld devices that can be viewed remotely can solve the problem in 1, it cannot reduce the number of staff, and ground base station debugging staff and track debugging staff are still needed.

[0006] 3. Safety issues. The ground base station is installed at a higher position. During the commissioning of the base station, the ground staff needs to use a lift to reach the installation height of the base station, which will cause a series of safety issues for the ground staff. Summary of the invention

[0007] In order to solve the above technical problems, the present invention provides a high-speed maglev base station automatic debugging device and method, which can reduce the number of debugging staff, ensure the safety of the staff, and improve the efficiency of base station debugging.

[0008] The technical solution adopted by the present invention is: a high-speed maglev base station automatic debugging device, including: a signal receiving device, a base station automatic debugging software, and a base station automatic control device.

[0009] The base station automatic control device includes: a control information receiving module, a controller, a sending module, and a servo motor; the controller is used to control the rotation of the servo motor, and the rotation speed v of the servo motor is set by the base station automatic debugging software to adjust the azimuth angle of the base station; the control information receiving module is used to receive control information sent from the remote end; the transmitting module is used to transmit 38G millimeter wave signals.

[0010] The signal receiving device includes: MCU, receiving module, and control information sending module; the receiving module is used to receive the field strength signal with a frequency of f1 sent by the base station, and perform data processing on the frequency field strength signal, and send the processed signal to the MCU; the control information sending module is used to send control information to the control information receiving module in the base station automatic control device; the MCU is used to process the data.

[0011] Among them, the field strength signal with a frequency of f1 is the 38G millimeter wave signal.

[0012] The base station automatic debugging software is connected to the MCU in the signal receiving device, and the base station automatic debugging software has control and real-time display functions, wherein the control function is used to control the azimuth of the base station, and the real-time display function is used to display the field strength and trend of the processed signal.

[0013] The present invention also provides a high-speed maglev base station automatic debugging method using the automatic debugging device, and the specific steps are as follows:

[0014] S1. First, modify the ground base station, install the base station automatic control device on the ground base station, fix the inspection vehicle of the maglev track, and place the staff, base station automatic debugging software and signal receiving device on the inspection vehicle;

[0015] S2. The staff connects the base station automatic control device with the base station automatic debugging software. The staff first sets the rotation speed of the servo motor. After the rotation speed is set, the staff clicks the software to start the automatic debugging button. The ground base station starts to automatically adjust the azimuth of the antenna, that is, the automatic debugging starts;

[0016] The software displays the current state of the antenna, and uses a base station debugging algorithm in the software to make the antenna azimuth reach an optimal state, so that the field strength of the optimal state reaches the maximum.

[0017] The base station automatic debugging software first sends the rotation speed v of the servo motor, which is first sent to the MCU. The MCU sends it to the control information receiving module of the base station automatic control device at a frequency f2 through the control information sending module, and then sets the speed v to the servo motor;

[0018] Among them, the frequency f2 is a 915MHz signal.

[0019] Then the staff clicks the start automatic debugging button, and the base station automatic debugging software sends a reset instruction, which is sent to the base station automatic control device in the same way; when the antenna in the base station is about to reach the reset point, that is, the minimum angle of the antenna, the base station automatic debugging software sends a start rotation instruction, which is sent to the base station automatic control device in the above manner, and the base station automatic control device controls the antenna in the base station at a speed v, so that the base station rotates from the minimum angle to the maximum angle and repeats three times.

[0020] During the rotation of the antenna, the signal receiving device receives the field strength signal at a frequency of f1, records the field strength information during the rotation process, and calculates the average value of three rotations. Then, the point of the maximum field strength, that is, the maximum point of the signal, is calculated based on the average value. After the angular position of the antenna is calculated, the position information is sent to the base station automatic control device through the control information sending module at a frequency of f2. Finally, the antenna in the base station automatic control device is accurately rotated to this angle, that is, the base station antenna field strength is at the maximum position.

[0021] The base station rotation angle is 0-180 degrees, and the position of the maximum field strength in each rotation is calculated by the base station rotation speed and the rotation angle. The calculation expression is as follows:

[0022]

[0023] S3. Based on step S2, determine whether the field strength changes significantly during the debugging process. If not, start the inspection vehicle and move forward or backward for a certain distance until the field strength changes significantly during the debugging process. Repeat steps S1-S2 and measure again to reach the maximum field strength at that location, end the debugging, and complete the automatic debugging function.

[0024] Furthermore, in step S2, the base station debugging algorithm is specifically as follows:

[0025] Set the power of the transmitted signal to P t , the power of the received signal is P r , then the relationship between the two is as follows:

[0026]

[0027] Among them, G tIt represents the antenna gain of the transmitting antenna in the direct transmission direction, G r It represents the antenna gain of the receiving antenna in the direct receiving direction, λ represents the wavelength, and d represents the distance between the transmitting and receiving ends.

[0028] Based on formula (2), the antenna on the base station is rotated to obtain the antenna's directional diagram. During the rotation of the antenna, the angle and field strength value of the antenna are recorded to make a one-to-one correspondence. For the obtained antenna field strength value data, its maximum value and its corresponding angle value are obtained; the recording is repeated multiple times to obtain multiple maximum field strength data and angle values, and the obtained angle values ​​are averaged. This average value is the point where the antenna field strength is maximum.

[0029] Beneficial effects of the present invention: The automatic debugging device of the present invention includes: a signal receiving device, a base station automatic debugging software, and a base station automatic control device. First, the automatic control device is added to the base station, and the debugging staff wears the automatic debugging software and the signal receiving device to complete the measurement of the base station. Compared with the existing vehicle-to-ground communication system debugging method, the present invention simplifies the debugging workflow, reduces the number of staff, improves the debugging efficiency, and provides greater guarantees for the safety of the staff. It is more convenient to debug the current high-speed maglev vehicle-to-ground communication system. When the high-speed maglev vehicle-to-ground communication system base station is installed and maintained, the base station debugging personnel can efficiently and quickly adjust the direction of the antenna, making it more convenient during the maintenance process, and providing efficient equipment and technical support for the maglev train vehicle-to-ground communication system. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a structural diagram of an automatic debugging device for a high-speed maglev base station of the present invention.

[0031] Figure 2 This is a simplified diagram of automatic debugging of a base station in an embodiment of the present invention.

[0032] Figure 3 The following is a flowchart of sending instructions in an embodiment of the present invention.

[0033] Figure 4 The data processing flow chart in the embodiment of the present invention.

[0034] Figure 5 Schematic diagram of the antenna in the embodiment of the present invention. DETAILED DESCRIPTION

[0035] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0036] like Figure 1 As shown, a high-speed maglev base station automatic debugging device of the present invention includes: a signal receiving device, a base station automatic debugging software, and a base station automatic control device.

[0037] The base station automatic control device includes: a control information receiving module, a controller, a sending module, and a servo motor; the controller is used to control the rotation of the servo motor, and the rotation speed v of the servo motor is set by the base station automatic debugging software to adjust the azimuth angle of the base station; the control information receiving module is used to receive control information sent from the remote end; the transmitting module is used to transmit 38G millimeter wave signals.

[0038] The signal receiving device includes: MCU, receiving module, and control information sending module; the receiving module is used to receive the field strength signal with a frequency of f1 sent by the base station, and perform data processing on the frequency field strength signal, and send the processed signal to the MCU; the control information sending module is used to send control information to the control information receiving module in the base station automatic control device; the MCU is used to process the data.

[0039] Among them, the field strength signal with a frequency of f1 is the 38G millimeter wave signal.

[0040] The base station automatic debugging software is connected to the MCU in the signal receiving device, and the base station automatic debugging software has control and real-time display functions, wherein the control function is used to control the azimuth of the base station, and the real-time display function is used to display the field strength and trend of the processed signal.

[0041] This embodiment also provides a high-speed maglev base station automatic debugging method using the automatic debugging device, and the specific steps are as follows:

[0042] S1, such as Figure 2 As shown, the schematic diagram of the automatic debugging of the base station in this embodiment, firstly, the ground base station is modified, the base station automatic control device is installed on the ground base station, and the inspection vehicle of the maglev track is fixed, and the staff, the base station automatic debugging software and the signal receiving device are placed on the inspection vehicle;

[0043] S2. The staff connects the base station automatic control device with the base station automatic debugging software. The staff first sets the rotation speed of the servo motor. After the rotation speed is set, the staff clicks the software to start the automatic debugging button. The ground base station starts to automatically adjust the azimuth of the antenna, that is, the automatic debugging starts;

[0044] The software displays the current state of the antenna, and uses a base station debugging algorithm in the software to make the antenna azimuth reach an optimal state, so that the field strength of the optimal state reaches the maximum.

[0045] The base station automatic debugging software first sends the rotation speed v of the servo motor, which is first sent to the MCU. The MCU sends it to the control information receiving module of the base station automatic control device at a frequency f2 through the control information sending module, and then sets the speed v to the servo motor;

[0046] Among them, the frequency f2 is a 915MHz signal.

[0047] Then the staff clicks the start automatic debugging button, and the base station automatic debugging software sends a reset instruction, which is sent to the base station automatic control device in the same way; when the antenna in the base station is about to reach the reset point, that is, the minimum angle of the antenna, the base station automatic debugging software sends a start rotation instruction, which is sent to the base station automatic control device in the above manner, and the base station automatic control device controls the antenna in the base station at a speed v, so that the base station rotates from the minimum angle to the maximum angle and repeats three times.

[0048] Among them, the instruction sending flow chart is as follows Figure 3 shown.

[0049] Data processing flow chart is as follows Figure 4 As shown, during the rotation of the antenna, the signal receiving device receives the field strength signal at a frequency of f1, records the field strength information during the rotation process, and calculates the average value of three rotations. Then, based on the average value, the point of the maximum field strength, that is, the maximum value point of the signal, is calculated. After the angular position of the antenna is calculated, the position information is sent to the base station automatic control device through the control information sending module at a frequency of f2. Finally, the antenna in the base station automatic control device is accurately rotated to this angle, that is, the base station antenna field strength is at the maximum position.

[0050] The base station rotation angle is 0-180 degrees, and the position of the maximum field strength in each rotation is calculated by the base station rotation speed and the rotation angle. The calculation expression is as follows:

[0051]

[0052] S3. Based on step S2, determine whether the field strength changes significantly during the debugging process. If not, start the inspection vehicle and move it forward or backward for a certain distance (even if the inspection vehicle is located at any position on the track) until the field strength changes significantly during the debugging process. Repeat steps S1-S2 and measure again to reach the maximum field strength at that location, end the debugging, and complete the automatic debugging function.

[0053] In this embodiment, in step S2, the base station debugging algorithm is specifically as follows:

[0054] According to the formula for signal propagation in free space, if there is no obstacle between the transmitter and receiver, the signal can propagate along the straight line connecting the two ends. The channel model at this time is called the line-of-sight model, and the signal can be regarded as propagating in free space.

[0055] Set the power of the transmitted signal to P t , the power of the received signal is P r , then the relationship between the two is as follows:

[0056]

[0057] Among them, G t It represents the antenna gain of the transmitting antenna in the direct transmission direction, G r It represents the antenna gain of the receiving antenna in the direct receiving direction, λ represents the wavelength, and d represents the distance between the transmitting and receiving ends.

[0058] Based on formula (2), the antenna on the base station is rotated to obtain the antenna pattern, as shown in Figure 5 As shown, the directional diagram is a diagram showing the relationship between the number of data and the receiving level during the rotation of the antenna. This diagram can be converted into the relationship between the angle and the receiving level. During the rotation of the antenna, the angle and field strength value of the antenna are recorded to make a one-to-one correspondence. For the obtained antenna field strength value data, its maximum value and its corresponding angle value are obtained; the recording is repeated multiple times to obtain multiple maximum field strength data and angle values, and the obtained angle values ​​are averaged. This average value is the point where the antenna field strength is maximum.

[0059] In summary, the present invention first adds an automatic control device to the base station, and the debugging staff brings the automatic debugging software and the signal receiving device to complete the measurement of the base station. Compared with the existing vehicle-to-ground communication system debugging method, the present invention simplifies the debugging workflow, reduces the number of staff, improves the debugging work efficiency, and provides greater guarantees for the safety of the staff. It is more convenient to debug the current high-speed maglev vehicle-to-ground communication system. When the high-speed maglev vehicle-to-ground communication system base station is installed and maintained, the base station debugging personnel can efficiently and quickly adjust the direction of the antenna, making it more convenient during the maintenance process, and providing efficient equipment and technical support for the maglev train vehicle-to-ground communication system.

[0060] Those skilled in the art will appreciate that the embodiments described herein are intended to help readers understand the principles of the present invention, and should be understood that the protection scope of the present invention is not limited to such specific statements and embodiments. Those skilled in the art can make various other specific variations and combinations that do not deviate from the essence of the present invention based on the technical revelations disclosed by the present invention, and these variations and combinations are still within the protection scope of the present invention.

Claims

1. A high-speed maglev base station automatic debugging device, comprising: Signal receiving device, base station automatic debugging software, base station automatic control device; The base station automatic control device includes: a control information receiving module, a controller, a transmitting module, and a servo motor; the controller is used to control the rotation of the servo motor, and the rotation speed v of the servo motor is set by the base station automatic debugging software to adjust the azimuth of the base station; the control information receiving module is used to receive control information sent from the remote end; the transmitting module is used to transmit 38G millimeter wave signals; The signal receiving device includes: an MCU, a receiving module, and a control information sending module; the receiving module is used to receive a field strength signal with a frequency of f1 sent by a base station, and to perform data processing on the frequency field strength signal, and to send the processed signal to the MCU; the control information sending module is used to send control information to the control information receiving module in the base station automatic control device; the MCU is used to process the data; Among them, the field strength signal with frequency f1 is the 38G millimeter wave signal; The base station automatic debugging software is connected to the MCU in the signal receiving device, and the base station automatic debugging software has control and real-time display functions, wherein the control function is used to control the azimuth of the base station, and the real-time display function is used to display the field strength and trend of the processed signal.

2. A high-speed maglev base station automatic debugging method, applied to the automatic debugging device, the specific steps are as follows: S1. First, modify the ground base station, install the base station automatic control device on the ground base station, fix the inspection vehicle of the maglev track, and place the staff, base station automatic debugging software and signal receiving device on the inspection vehicle; S2. The staff connects the base station automatic control device with the base station automatic debugging software. The staff first sets the rotation speed of the servo motor. After the rotation speed is set, the staff clicks the software to start the automatic debugging button. The ground base station starts to automatically adjust the azimuth of the antenna, that is, the automatic debugging starts; The software displays the current state of the antenna, and uses a base station debugging algorithm in the software to make the antenna azimuth reach an optimal state, so that the field strength of the optimal state reaches the maximum; The base station automatic debugging software first sends the rotation speed v of the servo motor, which is first sent to the MCU. The MCU sends it to the control information receiving module of the base station automatic control device at a frequency f2 through the control information sending module, and then sets the speed v to the servo motor; in, Frequency f2 is 915MHz signal; Then the staff clicks the start automatic debugging button, and the base station automatic debugging software sends a reset instruction, which is sent to the base station automatic control device in the same way; when the antenna in the base station is about to reach the reset point, that is, the minimum angle of the antenna, the base station automatic debugging software sends a start rotation instruction, which is sent to the base station automatic control device in the above manner, and the base station automatic control device controls the antenna in the base station at a speed v, so that the base station rotates from the minimum angle to the maximum angle and repeats three times; During the rotation of the antenna, the signal receiving device receives the field strength signal at a frequency of f1, records the field strength information during the rotation process, and calculates the average value of three rotations, and then calculates the point of the maximum field strength according to the average value, that is, the maximum point of the signal, and calculates the angular position of the antenna. After that, the position information is sent to the base station automatic control device through the control information sending module at a frequency of f2. Finally, the antenna in the base station automatic control device accurately rotates to the angle, that is, the base station antenna field strength is at the maximum position; The base station rotation angle is 0-180 degrees, and the position of the maximum field strength in each rotation is calculated by the base station rotation speed and the rotation angle. The calculation expression is as follows: S3. Based on step S2, determine whether the field strength changes significantly during the debugging process. If not, start the inspection vehicle and move forward or backward for a certain distance until the field strength changes significantly during the debugging process. Repeat steps S1-S2 and measure again to reach the maximum field strength at that location, end the debugging, and complete the automatic debugging function.

3. A high-speed maglev base station automatic debugging method according to claim 2, characterized in that: In step S2, the base station debugging algorithm is specifically as follows: Set the power of the transmitted signal to P t , the power of the received signal is P r , then the relationship between the two is as follows: Among them, G t It represents the antenna gain of the transmitting antenna in the direct transmission direction, G r represents the antenna gain of the receiving antenna in the direct receiving direction, λ represents the wavelength, and d represents the distance between the transmitting and receiving ends; Based on formula (2), the antenna on the base station is rotated to obtain the antenna's directional diagram. During the rotation of the antenna, the angle and field strength value of the antenna are recorded to make a one-to-one correspondence. For the obtained antenna field strength value data, its maximum value and its corresponding angle value are obtained; the recording is repeated multiple times to obtain multiple maximum field strength data and angle values, and the obtained angle values ​​are averaged. This average value is the point where the antenna field strength is maximum.

Images