Straddle type monorail stable tire pressure monitoring system and monitoring control method thereof

Abstract

The invention discloses a straddle type monorail stable tire pressure monitoring system. A vehicle to which the system is applied comprises stable wheels and a vehicle-mounted computer. The vehicle-mounted computer is connected with the central control unit through a circuit signal circuit; the stable tire pressure monitoring system is provided with a camera, and the camera collects image signals of a stable wheel. And the camera is connected with the vehicle-mounted computer through a signal circuit. The invention further discloses a monitoring control method of the tire pressure monitoring system. By adopting the technical scheme, the problem that the tire pressure receiver is influenced to receive signals transmitted by the sensor due to the addition of the axle counting steel plate is solved, and the accuracy and the timeliness of stable tire pressure signal acquisition are improved; the system is stable in performance and simple in structure, can effectively detect the running state of the stabilizing wheel, does not need a complex signal receiving system for transmission analysis, and avoids the conditions of false alarm and protection omission. And meanwhile, the universality on vehicles of different models can be ensured.

Description

Technical Field

[0001] The present invention belongs to the technical field of safe operation control of straddle-type monorail vehicles. More specifically, the present invention relates to a stable tire pressure monitoring system for straddle-type monorail vehicles. The present invention also relates to a monitoring and control method adopted by the tire pressure monitoring system. Background Art

[0002] The stabilizing wheel is an important part of the straddle-type monorail travel mechanism. The tire pressure monitoring system can not only monitor the tire operating status in real time, but also serve as an alarm to reduce the risk of tire failure.

[0003] At present, the tire pressure monitoring of the monorail chassis uses a tire pressure receiver to receive the signal transmitted by the tire pressure sensor, and the sensor transmits the signal to the receiver, and then the tire pressure system analyzes the tire operation status. The tire pressure sensor is installed in the stabilizing wheel of the straddle-type monorail vehicle, and the detected tire pressure information is sent to the receiving host through wireless high-frequency communication to realize the detection of the operation status of the stabilizing wheel.

[0004] To ensure the stability of train operation, straddle-type monorail vehicles also need to be equipped with axle counting equipment to enable the train to determine the direction of vehicle movement and the train sensor plate counting function. However, the installation of axle counting steel plates will hinder the transmission of sensor signals and affect the receiver's reception of signals.

[0005] The problems and defects of the prior art are:

[0006] Due to the complex environment of the monorail chassis and the small available space, there is no other suitable location to install the axle counter steel plate, so the axle counter steel plate is installed at the bottom of the stabilizing wheel. However, the axle counter steel plate installed at the bottom of the stabilizing wheel will affect the transmission of the tire pressure sensor signal, resulting in frequent false alarms and missed alarms in the tire pressure monitoring system.

[0007] The following search results were obtained by searching the existing public technical literature using keywords such as "straddle; monorail; tire; tire pressure; detection":

[0008] 1. Chinese patent document: "An online tire pressure detection device for horizontal rubber tires of straddle-type monorail trains", patent (application) number: 202011452823.X; the technical solution recorded is:

[0009] "An online tire pressure detection device for horizontal rubber tires of a straddle-type monorail train, comprising a pressure detection system, a signal processing system and a display and control system, wherein the pressure detection system comprises at least two pressure sensor assemblies; the pressure sensor assembly comprises a sensor pressure plate, a compression spring and a pressure sensor; the signal processing system is connected to each pressure sensor through a wire to obtain the pressure value detected by each pressure sensor, and then convert it into tire pressure; the display and control system comprises a computer and a vehicle number recognition device";

[0010] The technical effects recorded are:

[0011] "By testing the pressure of the guide wheels and stabilizer wheels, after the signal processing system sends it to the computer of the display and control system, the position of the corresponding horizontal rubber tire is calculated sequentially through the vehicle number recognition record and the pressure data of the pressure sensor assembly. This is conducive to timely maintenance or replacement of guide wheels and stabilizer wheels that exceed the set range value, thereby improving the driving safety of straddle-type monorail trains."

[0012] 2. Chinese patent document: "Vehicle deviation correction method", patent (application) number: 202310659006.9; the technical solution recorded is:

[0013] "The on-board computer obtains tire pressure information. If the difference in tire pressure is greater than the set threshold, the vehicle enters the active deviation correction driving state and corrects the vehicle's driving direction based on the tire pressure data";

[0014] The technical effects recorded are:

[0015] "Using tire pressure as a correction indicator is a single and clear indicator. It can correct the vehicle's deviation in a timely manner based on abnormal tire pressure conditions, and effectively avoid the occurrence of vehicle deviation due to one-side tire deflation."

[0016] However, the technical solutions recorded in the above-mentioned technical documents and the related technical solutions currently in public use have not been able to solve the problems and defects of "false reporting and missed reporting of tire pressure information often occurring in tire pressure monitoring systems" existing in the prior art. Summary of the invention

[0017] The invention provides a straddle-type monorail stable tire pressure monitoring system, the purpose of which is to improve the accuracy of stable tire pressure signal acquisition.

[0018] In order to achieve the above object, the technical solution adopted by the present invention is:

[0019] The invention relates to a straddle-type monorail stable tire pressure monitoring system, wherein the vehicle to which the system is applied comprises a stable wheel and an on-board computer; the on-board computer is connected to a central control unit via a circuit signal circuit; the stable tire pressure monitoring system is provided with a camera, and the camera collects image signals of the stable wheel; the camera is connected to the on-board computer via a signal circuit.

[0020] The signal circuit connecting the camera and the vehicle-mounted computer adopts a wired circuit.

[0021] The camera comprises a visual camera unit and an infrared camera unit.

[0022] The surface of the stabilizing wheel tire is marked in a grid pattern using a durable infrared reflective paint, and the grid is divided into a high-contrast square arrangement, each grid having a side length of 5 mm and a spacing of 1 mm.

[0023] The camera is fixedly mounted on the end skirt column of the vehicle through a mounting bracket.

[0024] Each of the stabilizing wheels is correspondingly provided with a camera for independent information collection.

[0025] The camera collects the stabilizing wheel tire information every 0.5 seconds.

[0026] The tire pressure monitoring system sets the tire deformation threshold of the stabilizing wheel to 5%.

[0027] The tire pressure monitoring system sets the temperature rise threshold of the stabilizing wheel to 60°C.

[0028] In order to achieve the same invention purpose as the above technical solution, the present invention also provides a monitoring and control method of the above-mentioned straddle-type monorail stable tire pressure monitoring system, and its technical solution is:

[0029] When the vehicle is running, the stabilizing wheel is in a rolling state, and the stabilizing wheel tire is deformed and the temperature changes. At this time, the infrared marking grid on the surface of the stabilizing wheel tire begins to change, and the tire pressure monitoring system controls the camera to start working to collect the deformation information and temperature distribution information of the marked stabilizing wheel tire;

[0030] The tire information of the stable wheel collected by the tire pressure monitoring system is transmitted to the on-board computer in real time through a wired connection;

[0031] After receiving the data, the onboard computer analyzes the thermal image and identifies the spatial position of each marking point when the stabilizing wheel tire is running;

[0032] The onboard computer analyzes the pixel intensity of the stabilizer wheel tire image to identify possible abnormal hot spots, including local overheating areas;

[0033] The on-board computer analyzes the image of the stabilizing wheel tire, compares the spatial position of the marking point in the static state and the spatial position in the dynamic state, and obtains the deformation of the stabilizing wheel tire during operation;

[0034] At the same time, the onboard computer will compare the collected real-time data with the stored historical data to evaluate the trend changes in the status of the stabilizing wheel tire;

[0035] The central control unit receives the analysis result of the on-board computer and compares the deformation and temperature of the current stabilizing wheel with the deformation threshold and temperature threshold set by the system;

[0036] When the deformation of the stabilizing wheel tire exceeds 5%, and / or the temperature of the stabilizing wheel tire exceeds 60°C, the central control unit will immediately send out a warning signal to notify the train operator;

[0037] All monitoring data and alarm records will be saved by the central control unit to provide a basis for subsequent maintenance and troubleshooting.

[0038] The present invention adopts the above-mentioned technical scheme to solve the problem that the installation of an axle counter steel plate affects the tire pressure receiver's reception of the sensor transmission signal, thereby improving the accuracy and timeliness of the stable tire pressure signal acquisition; the system has stable performance and simple structure, can effectively detect the running status of the stable wheel, does not require a complex signal receiving system for transmission analysis, and avoids false alarms and missed protection; at the same time, it can ensure universality on vehicles of different models. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The contents shown in the attached drawings and the symbols in the drawings are briefly described as follows:

[0040] Figure 1 It is a structural schematic diagram of the present invention;

[0041] Figure 2 It is a schematic diagram of the signal transmission relationship of the tire pressure monitoring control method of the present invention.

[0042] The markings in the figure are:

[0043] 1. Stabilizing wheel, 2. Camera, 3. Onboard computer, 4. Central control unit, 5. Mounting bracket, 6. Skirt column. DETAILED DESCRIPTION

[0044] The specific implementation modes of the present invention are further explained in detail below by describing the embodiments with reference to the accompanying drawings, so as to help those skilled in the art to have a more complete, accurate and in-depth understanding of the inventive concept and technical solution of the present invention.

[0045] like Figure 1 The structure of the present invention is a straddle-type monorail stable tire pressure monitoring system, the vehicle used in the system includes a stable wheel 1 and a vehicle-mounted computer 3; the vehicle-mounted computer 3 is connected to a central control unit 4 through a circuit signal circuit. The system is a monitoring system that can monitor the running status of the stable wheel in real time.

[0046] In order to solve the problems existing in the prior art and overcome its defects, and to achieve the invention purpose of improving the accuracy of stable tire pressure signal acquisition, the technical solution adopted by the present invention is:

[0047] like Figure 2As shown, the straddle-type monorail stable tire pressure monitoring system of the present invention is provided with a camera 2, and the camera 2 collects the image signal of the stable wheel 1; the camera 2 is connected to the on-board computer 3 through a signal circuit.

[0048] The signal circuit connecting the camera 2 and the vehicle-mounted computer 3 adopts a wired circuit.

[0049] The tire pressure monitoring system of the present invention is a brand-new tire pressure monitoring system, which uses wired transmission to transmit signals, and achieves the effect of monitoring the tire pressure of the stabilizing wheel 1 by real-time monitoring of tire temperature and dynamic deformation of the stabilizing wheel tire and comparative analysis. The system is equipped with a camera, and based on the comparison and judgment of the changes of the real object, it has high accuracy, reduces false alarms or missed alarms caused by problems of the monitoring system itself, and improves the reliability of the overall system; it can monitor in real time to prevent safety problems caused by signal loss.

[0050] The camera 2 includes a visual camera unit and an infrared camera unit.

[0051] The visual camera unit is mainly used to collect information on the deformation of the stabilizing wheel 1 tire; the infrared camera unit is used to collect information on temperature changes of the stabilizing wheel 1 tire, and can also collect deformation information in combination with the reflection of the infrared reflective paint. The combination of the two can obtain more accurate information on temperature rise and deformation.

[0052] The tire pressure monitoring system is designed to closely integrate an infrared thermal imaging camera with a stabilizing wheel, ensuring that tire temperature changes and deformation information can be accurately captured even when the train is running at high speeds and under complex track conditions.

[0053] The surface of the stabilizing wheel 1 tire is grid-marked with durable infrared reflective paint, and the grid is divided into high-contrast squares, each grid has a side length of 5mm and a spacing of 1mm (the longitudinal and lateral spacings are both 1mm) to ensure sufficient resolution under thermal imaging.

[0054] The camera 2 is mounted on the vehicle end skirt column 6 and is fixedly mounted on the vehicle end skirt column 6 by a mounting bracket 5. The mounting bracket 5 is used to mount and fix the camera 2.

[0055] Each of the stabilizing wheels 1 is provided with a camera 2 to collect information independently, ensuring that the side wall of the stabilizing wheel 2 can be clearly captured;

[0056] The camera 2 collects tire information of the stabilizing wheel 1 every 0.5 seconds.

[0057] The tire pressure monitoring system sets the threshold value of the tire deformation of the stabilizing wheel 1 to 5%. That is, if the tire deformation of the stabilizing wheel 1 exceeds 5%, it is considered to be a fault or danger, and the system should issue an alarm.

[0058] The tire pressure monitoring system sets the temperature rise threshold of the stabilizing wheel 1 to 60° C. Similarly, if the temperature of the tire of the stabilizing wheel 1 exceeds 60° C., it is considered to be a fault or danger, and the system should issue an alarm.

[0059] In order to achieve the same invention purpose as the above technical solution, the present invention also provides a monitoring and control method of the above-mentioned straddle-type monorail stable tire pressure monitoring system, such as Figure 2 As shown, the technical solution is:

[0060] When the vehicle is running, the stabilizing wheel 1 is in a rolling state, and the tire of the stabilizing wheel 1 is deformed and the temperature changes. At this time, the infrared marking grid on the surface of the tire of the stabilizing wheel 1 begins to change, and the tire pressure monitoring system controls the camera 2 to start working, collects the deformation information and temperature distribution information of the marked stabilizing wheel 1 tire, and uses the difference in infrared radiation to accurately identify the hot spot area of ​​the tire, indirectly reflecting the pressure status and potential damage of the tire; improves the accuracy of the stable tire pressure signal collection; the system has stable performance and simple structure, and can effectively detect the running status of the stabilizing wheel to avoid false alarms and missed insurance

[0061] The tire information of the stable wheel 1 collected by the tire pressure monitoring system is transmitted to the onboard computer 3 in real time through a wired connection;

[0062] After receiving the data, the onboard computer 3 analyzes the thermal imaging image and identifies the spatial position of each marking point when the tire of the stabilizing wheel 1 is running;

[0063] The onboard computer 3 identifies possible abnormal hot spots, including local overheating areas, by analyzing the pixel intensity of the tire image of the stabilizing wheel 1; this may be caused by insufficient internal pressure or damage to the tire of the stabilizing wheel 1;

[0064] The onboard computer 3 analyzes the tire image of the stabilizing wheel 1, compares the spatial position of the marking point in a static state and the spatial position in a dynamic state, and obtains the deformation amount of the tire of the stabilizing wheel 1 during operation;

[0065] At the same time, the onboard computer 3 compares the collected real-time data with the stored historical data to evaluate the trend change of the tire status of the stabilizing wheel 1;

[0066] The central control unit 4 receives the analysis result of the onboard computer 3 and compares the deformation and temperature of the tire of the current stabilizing wheel 1 with the threshold deformation and temperature set by the system;

[0067] When the deformation of the stabilizing wheel 1 tire exceeds 5% or the temperature of the stabilizing wheel 1 tire exceeds 60°C (or the deformation of the stabilizing wheel 1 tire exceeds 5% and the temperature of the stabilizing wheel 1 tire exceeds 60°C), the central control unit 4 will immediately send out a warning signal to notify the train operator;

[0068] When the tire deformation exceeds 5%, and / or the tire temperature exceeds 60 degrees, the central control unit 4 will immediately send out a warning signal to notify the train operator;

[0069] All monitoring data and alarm records will be saved by the central control unit 4 to provide a basis for subsequent maintenance and troubleshooting.

[0070] The tire pressure monitoring system of the present invention is different from the tire pressure monitoring system of the prior art in that it transmits signals through wireless signals: instead, it transmits signals by wired transmission, and realizes stable tire pressure monitoring through measurement and comparative analysis of tire temperature and deformation amount during tire rolling, without being affected by external interference. The accuracy and stability of information transmission are improved, thus preventing the occurrence of faults and ensuring the normal operation of the vehicle.

[0071] The present invention is described above by way of example in conjunction with the accompanying drawings. It is obvious that the specific implementation of the present invention is not limited to the above-mentioned method. As long as various non-substantial improvements are made using the method concept and technical solution of the present invention, or the concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. A straddle-type monorail stable tire pressure monitoring system, the vehicle to which the system is applied comprises a stable wheel (1) and an onboard computer (3); the onboard computer (3) is connected to a central control unit (4) via a circuit signal circuit, and is characterized in that: The stable tire pressure monitoring system is provided with a camera (2), and the camera (2) collects image signals of the stable wheel (1); the camera (2) is connected to the vehicle-mounted computer (3) via a signal circuit.

2. The straddle-type monorail stable tire pressure monitoring system according to claim 1, characterized in that: The signal circuit connecting the camera (2) and the vehicle-mounted computer (3) adopts a wired circuit.

3. The straddle-type monorail stable tire pressure monitoring system according to claim 1, characterized in that: The camera (2) comprises a visual camera unit and an infrared camera unit.

4. The straddle-type monorail stable tire pressure monitoring system according to claim 1, characterized in that: The tire surface of the stabilizing wheel (1) is marked in a grid pattern using a durable infrared reflective paint, and the grid is divided into a high-contrast square arrangement, each grid having a side length of 5 mm and a spacing of 1 mm.

5. The straddle-type monorail stable tire pressure monitoring system according to claim 1, characterized in that: The camera (2) is fixedly mounted on a vehicle end skirt column (6) via a mounting bracket (5).

6. The straddle-type monorail stable tire pressure monitoring system according to claim 1, characterized in that: Each of the stabilizing wheels (1) is correspondingly provided with a camera (2) for independently collecting information, ensuring that the side wall of the stabilizing wheel 2 can be clearly captured.

7. The straddle-type monorail stable tire pressure monitoring system according to claim 1, characterized in that: The camera (2) collects tire information of the stabilizing wheel (1) every 0.5 seconds.

8. The straddle-type monorail stable tire pressure monitoring system according to claim 1, characterized in that: The tire pressure monitoring system sets the tire deformation threshold of the stabilizing wheel (1) to 5%.

9. The straddle-type monorail stable tire pressure monitoring system according to claim 1, characterized in that: The tire pressure monitoring system sets the temperature rise threshold of the stabilizing wheel (1) to 60°C.

10. The monitoring and control method of the tire pressure monitoring system of the straddle-type monorail stability according to any one of claims 1 to 9, characterized in that: When the vehicle is running, the stabilizing wheel (1) is in a rolling state, and the tire of the stabilizing wheel (1) undergoes deformation and temperature changes. At this time, the infrared marking grid on the surface of the tire of the stabilizing wheel (1) begins to change, and the tire pressure monitoring system controls the camera (2) to start working, and collects deformation information and temperature distribution information of the marked tire of the stabilizing wheel (1); The tire information of the stabilizing wheel (1) collected by the tire pressure monitoring system is transmitted to the vehicle-mounted computer (3) in real time via a wired connection; After receiving the data, the onboard computer (3) analyzes the thermal imaging image and identifies the spatial positions of each marking point when the tire of the stabilizing wheel (1) is running; The onboard computer (3) identifies possible abnormal hot spots, including local overheating areas, by analyzing the pixel intensity of the tire image of the stabilizing wheel (1); The on-board computer (3) analyzes the tire image of the stabilizing wheel (1), compares the spatial position of the marking point in a static state and the spatial position in a dynamic state, and obtains the deformation amount of the tire of the stabilizing wheel (1) during operation; At the same time, the onboard computer (3) will compare the collected real-time data with the stored historical data to evaluate the trend change of the tire status of the stabilizing wheel (1); The central control unit (4) receives the analysis result of the onboard computer (3), and compares the deformation and temperature of the current stabilizing wheel (1) with the deformation threshold and temperature threshold set by the system; When the deformation of the stabilizing wheel (1) tire exceeds 5%, and / or the temperature of the stabilizing wheel (1) tire exceeds 60° C., the central control unit (4) will immediately send out a warning signal to notify the train operator; All monitoring data and alarm records will be saved by the central control unit (4) to provide a basis for subsequent maintenance and troubleshooting.

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