Anti-magnetic-interference ultrasonic sensor for UWB positioning of urban rail transit

Abstract

The utility model belongs to the technical field of urban rail transit, and discloses an anti-magnetic-interference ultrasonic sensor for UWB positioning of urban rail transit, which comprises an anti-magnetic-interference shielding shell, a sensor structure is arranged in the anti-magnetic-interference shielding shell, and a sensor circuit board is mounted at the bottom of the anti-magnetic-interference shielding shell. The sensor circuit board is provided with a plug; the sensor structure comprises an ultrasonic transmitting module used for transmitting ultrasonic signals, an ultrasonic receiving module used for receiving reflected ultrasonic signals and a signal processing unit, the anti-magnetic interference shielding shell is made of copper or aluminum, and the signal processing unit is used for processing the received ultrasonic signals and calculating distance information; and a through hole is formed in the corner of the top of the sensor circuit board. According to the utility model, the ultrasonic ranging technology and the anti-magnetic interference shielding technology are combined, so that the positioning precision and stability are effectively improved, and the system can be applied to an urban rail transit system in a complex electromagnetic environment.

Description

Technical Field

[0001] This utility model relates to the field of urban rail transit technology, and in particular to an ultrasonic sensor resistant to magnetic interference for UWB positioning in urban rail transit. Background Technology

[0002] An ultrasonic sensor is an electronic device that uses ultrasonic waves for ranging, detection, or positioning. It measures distance or detects the presence of objects by emitting ultrasonic waves and receiving reflected signals. It is also a multifunctional and cost-effective detection device that is widely used in industries such as industry, transportation, and consumer electronics.

[0003] With the rapid development of urban rail transit, train positioning technology has become crucial for ensuring operational safety and efficiency. UWB (Ultra-Wideband) positioning systems are widely used due to their high precision and strong anti-interference capabilities. However, the urban rail transit environment is subject to strong electromagnetic interference, which can interfere with UWB signals and lead to a decrease in positioning accuracy. Therefore, we propose an anti-magnetic interference ultrasonic sensor for UWB positioning in urban rail transit. Utility Model Content

[0004] In order to overcome the defects of the prior art mentioned above, the inventors conducted in-depth research and, after a great deal of creative work, completed this utility model.

[0005] Specifically, the technical problem to be solved by this utility model is to provide an ultrasonic sensor with anti-magnetic interference for UWB positioning in urban rail transit, so as to solve the technical problem that the UWB signal is affected by strong electromagnetic interference in the current urban rail transit environment, resulting in a decrease in positioning accuracy.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution:

[0007] An ultrasonic sensor resistant to magnetic interference for UWB positioning in urban rail transit includes an anti-magnetic interference shielding shell, a sensor structure is provided inside the anti-magnetic interference shielding shell, a sensor circuit board is installed at the bottom of the anti-magnetic interference shielding shell, and a plug is installed on the sensor circuit board.

[0008] The sensor structure includes an ultrasonic transmitting module for emitting ultrasonic signals, an ultrasonic receiving module for receiving reflected ultrasonic signals, and a signal processing unit.

[0009] As an improved technical solution, the anti-magnetic interference shielding shell is made of copper or aluminum.

[0010] As an improved technical solution, the signal processing unit is used to process the received ultrasonic signal and calculate the distance information.

[0011] As an improved technical solution, a through hole is provided at the top corner of the sensor circuit board;

[0012] A support column is fixedly installed at the bottom corner of the sensor circuit board, and a long fixing bolt is inserted into the through hole and the support column.

[0013] As an improved technical solution, the support column is hollow in the middle, and the cross-section of the support column and the cross-section of the through hole are concentric circles.

[0014] As an improved technical solution, the outer surface of the end of the support column away from the sensor circuit board has an integral support flange for support.

[0015] As an improved technical solution, the sensor is installed on the bottom of the train or beside the track by means of a threaded connection between the long fixing bolt inserted into the through hole and the support column, and works in conjunction with the UWB positioning system.

[0016] After adopting the above technical solution, the beneficial effects of this utility model are:

[0017] 1. This utility model, by combining ultrasonic sensors and anti-magnetic interference technology, effectively improves the accuracy and stability of the urban rail transit UWB positioning system, especially performing excellently in environments with strong electromagnetic interference, and has broad application prospects.

[0018] 2. This utility model provides accurate distance information by installing a sensor on the bottom of a train or beside the track and working in conjunction with a UWB positioning system. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0020] Figure 1 This is a schematic diagram of the overall main structure of this utility model.

[0021] Figure 2 This is a schematic diagram of the overall bottom view of the present invention.

[0022] Figure 3 This is a schematic diagram of the structure of this utility model that eliminates the long fixing bolt.

[0023] Explanation of reference numerals in the attached figures:

[0024] In the diagram: 1. Anti-magnetic interference shielding shell; 2. Sensor circuit board; 201. Through hole; 3. Plug; 4. Support column; 401. Support flange; 5. Long fixing bolt. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0027] Meanwhile, the meaning of "and / or" or "and / or" appearing throughout the text is that it includes three options. Taking "A and / or B" as an example, it includes option A, option B, or an option that satisfies both A and B.

[0028] Furthermore, in this utility model, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0029] Reference Figure 1-3 An ultrasonic sensor resistant to magnetic interference for UWB positioning in urban rail transit is provided. This ultrasonic sensor resistant to magnetic interference for UWB positioning in urban rail transit includes an anti-magnetic interference shielding shell 1. The sensor structure is provided inside the anti-magnetic interference shielding shell 1. The sensor circuit board 2 is installed at the bottom of the anti-magnetic interference shielding shell 1. The anti-magnetic interference shielding shell 1 and the sensor circuit board 2 are isolated by insulating material to avoid short circuit. A plug 3 is installed on the sensor circuit board 2.

[0030] The sensor structure includes an ultrasonic transmitting module for emitting ultrasonic signals, an ultrasonic receiving module for receiving reflected ultrasonic signals, and a signal processing unit. The ultrasonic transmitting and receiving modules are symmetrically arranged and fixed to the sensor circuit board 2 by welding or plugging. The transmitting / receiving surfaces face outwards, and a certain distance is maintained between the ultrasonic transmitting and receiving modules to avoid signal crosstalk. The signal processing unit is located close to the ultrasonic receiving module and is mounted on the sensor circuit board 2 by welding. In application, the ultrasonic transmitting module emits ultrasonic signals towards the target, and the ultrasonic receiving module receives the reflected signals and transmits them to the signal processing unit. The signal processing unit calculates the time difference between the emitted and received signals to determine the target distance. During this process, the anti-magnetic interference shielding shell 1 effectively isolates external electromagnetic interference, ensuring stable operation of the sensor in complex electromagnetic environments. This effectively improves positioning accuracy and stability, making it suitable for urban rail transit systems in complex electromagnetic environments.

[0031] Reference Figure 1-3 The anti-magnetic interference shielding shell 1 is made of copper or aluminum to reduce external electromagnetic interference.

[0032] Reference Figure 1-3 The signal processing unit processes the received ultrasonic signals and calculates distance information to facilitate the processing of the received ultrasonic signals.

[0033] Reference Figure 2 and Figure 3 A through hole 201 is provided at the top corner of the sensor circuit board 2;

[0034] A support column 4 is fixedly installed at the bottom corner of the sensor circuit board 2. A long fixing bolt 5 is inserted into the through hole 201 and the inside of the support column 4 so that the long fixing bolt 5 can be inserted into the sensor circuit board 2 and the support column 4.

[0035] Reference Figure 3 The support column 4 is hollow in the middle, and the cross-section of the support column 4 is concentric with the cross-section of the through hole 201 to facilitate fixing.

[0036] Reference Figure 3 The outer surface of the support column 4 away from the sensor circuit board 2 has an integral support flange 401 for support, so as to play a supporting and load-bearing role.

[0037] Reference Figure 1-3The sensor is installed on the bottom of the train or beside the track by inserting a long fixing bolt 5 into the through hole 201 and the support column 4 and connecting them by thread. It works in conjunction with the UWB (Ultra-Wideband) positioning system. The UWB positioning system is existing technology and will not be described in detail here. In application, by installing the sensor on the bottom of the train or beside the track and working in conjunction with the UWB positioning system, accurate distance information can be provided.

[0038] It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. Furthermore, it should be understood that after reading the technical description of this utility model, those skilled in the art can make various alterations, modifications, and / or variations to this utility model, and all such equivalent forms also fall within the scope of protection defined by the appended claims.

Claims

1. An ultrasonic sensor resistant to magnetic interference for UWB positioning in urban rail transit, characterized in that: The device includes an anti-magnetic interference shielding shell (1), the interior of which is equipped with a sensor structure, and a sensor circuit board (2) is installed at the bottom of the anti-magnetic interference shielding shell (1), and a plug (3) is installed on the sensor circuit board (2). The sensor structure includes an ultrasonic transmitting module for emitting ultrasonic signals, an ultrasonic receiving module for receiving reflected ultrasonic signals, and a signal processing unit.

2. The ultrasonic sensor for UWB positioning in urban rail transit with anti-magnetic interference as described in claim 1, characterized in that: The anti-magnetic interference shielding shell (1) is made of copper or aluminum.

3. The ultrasonic sensor for UWB positioning in urban rail transit with anti-magnetic interference as described in claim 1, characterized in that: The signal processing unit is used to process the received ultrasonic signals and calculate the distance information.

4. The ultrasonic sensor for UWB positioning in urban rail transit with anti-magnetic interference as described in claim 1, characterized in that: A through hole (201) is provided at the top corner of the sensor circuit board (2). A support column (4) is fixedly installed at the bottom corner of the sensor circuit board (2), and a long fixing bolt (5) is inserted into the through hole (201) and the support column (4).

5. The ultrasonic sensor for UWB positioning in urban rail transit with anti-magnetic interference according to claim 4, characterized in that: The support column (4) is hollow in the middle, and the cross-section of the support column (4) and the cross-section of the through hole (201) are concentric circles.

6. The ultrasonic sensor for UWB positioning in urban rail transit with anti-magnetic interference according to claim 5, characterized in that: The outer surface of the support column (4) away from the sensor circuit board (2) has an integral support flange (401) for support.

7. The ultrasonic sensor for UWB positioning in urban rail transit with anti-magnetic interference according to claim 6, characterized in that: The sensor is installed on the bottom of the train or beside the track by being inserted into the through hole (201) and the support column (4) by the long fixing bolt (5) and is connected by threads, and works in conjunction with the UWB positioning system.

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