A tractor and trailer sensor pairing system and method

Abstract

The application discloses a tractor and trailer sensor pairing system and method, and relates to the technical field of wireless communication.The system comprises a host computer and a plurality of sensors.The host computer and each sensor comprise a multi-axis motion sensing module.The host computer is arranged on a tractor, and each sensor is arranged on a trailer.Each sensor is used for detecting a first acceleration through the multi-axis motion sensing module.A handshake signal is sent through a listening channel according to the first acceleration.The host computer is used for listening to the handshake signal sent by each sensor through the listening channel.A handshake communication is performed with the sensor according to the handshake signal and a second acceleration detected by the multi-axis motion sensing module of the host computer.The sensor detects trailer abnormality through the multi-axis motion sensing module, and the sensor is quickly woken up when the tractor and the trailer are connected and moved, so that the power consumption is reduced.The sensor and the host computer on the tractor are authenticated through a point-to-point handshake communication, so that the fast connection is realized.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of wireless communication, in particular to a sensor pairing system and method for a tractor and a trailer. BACKGROUND

[0002] Because the tractor and the trailer are in a replaceable combination mode, pairing communication between the host of the tractor and the sensors of the trailer is a difficult problem to be solved. In the traditional mode, the signals of the trailer are connected to the tractor head using signal lines, and the signal lines need to be reconnected every time the trailer is replaced, which is time-consuming and laborious.

[0003] The vehicle-mounted sensors are distributed in multiple places in the trailer, and it is difficult to connect them through wired connection. In the traditional wireless scheme, the sensors in the trailer need to work continuously, and the power consumption is relatively high, and the handshake speed is inversely proportional to the power consumption. SUMMARY

[0004] The main purpose of the embodiments of the present application is to provide a sensor pairing system and method for a tractor and a trailer to reduce the pairing power consumption.

[0005] To achieve the above-mentioned purpose, one aspect of the embodiments of the present application provides a sensor pairing system for a tractor and a trailer, which comprises: a host and a plurality of sensors; the host and each of the sensors comprise a multi-axis motion sensing module;

[0006] The host is arranged on the tractor, and each of the sensors is arranged on the trailer.

[0007] Each of the sensors is configured to detect a first acceleration through the multi-axis motion sensing module, and send a handshake signal through a listening channel according to the first acceleration.

[0008] The host is configured to listen to the handshake signal sent by each of the sensors through the listening channel, and perform handshake communication with the sensors according to the handshake signal and a second acceleration detected by the multi-axis motion sensing module of the host.

[0009] In some embodiments, each of the sensors is configured to send a plurality of types of handshake signals.

[0010] In some embodiments, the host is configured to read the second acceleration detected by the multi-axis motion sensing module of the host, determine the strength information of the handshake signal, select the sensor with the highest strength information and the most matched first acceleration and second acceleration for response, and then perform handshake communication.

[0011] In some embodiments, the host and each of the sensors are configured to perform handshake communication on a working channel.

[0012] In some embodiments, each of the sensors is further configured to enter a sleep state when a change in the first acceleration detected by the multi-axis motion sensing module is less than a first set threshold, and a difference between the first acceleration and a gravitational acceleration is less than a second set threshold.

[0013] In some embodiments, each of the sensors is configured to, in the sleep state, periodically turn on the sensor by the MCU to detect a change in acceleration using the multi-axis motion sensing module, and exit the sleep state if a change in acceleration is detected, or remain in the sleep state if no change in acceleration is detected.

[0014] In some embodiments, the host and each of the sensors use a preset password to encrypt a communication frame during a handshake communication process.

[0015] In some embodiments, the working communication password used by the host and each of the sensors is different from the handshake communication password.

[0016] In some embodiments, after any one of the sensors performs a handshake communication with the host, the remaining sensors stop sending the handshake signal.

[0017] To achieve the above object, another aspect of the embodiments of the present application proposes a sensor pairing method for a tractor and a trailer, which is applied to a sensor pairing system for a tractor and a trailer as described in the present application, and includes the following steps:

[0018] detecting a first acceleration by each sensor using a multi-axis motion sensing module of the sensor;

[0019] sending a handshake signal by each of the sensors according to the first acceleration through a listening channel;

[0020] listening to the handshake signal sent by each of the sensors through the listening channel by a host;

[0021] performing a handshake communication with the sensors by the host according to the handshake signal and a second acceleration detected by a multi-axis motion sensing module of the host.

[0022] The embodiments of the present application at least have the following beneficial effects:

[0023] The system of the application comprises a host and a plurality of sensors; the host and each sensor comprise a multi-axis motion sensing module; wherein the host is arranged on a towing vehicle, and each sensor is arranged on a trailer; each sensor is configured to detect a first acceleration through the multi-axis motion sensing module; and send a handshake signal through a listening channel according to the first acceleration; the host is configured to listen to the handshake signal sent by each sensor through the listening channel; and perform handshake communication with the sensor according to the handshake signal and a second acceleration detected by the multi-axis motion sensing module of the host. The sensor arranged on the trailer detects abnormal movement of the trailer through the multi-axis motion sensing module, and when the towing vehicle and the trailer are connected and move, the sensor is quickly woken up, thereby reducing power consumption; and the sensor performs handshake communication authentication with the host on the towing vehicle in a point-to-point manner, thereby realizing fast connection. The entire pairing process does not require human intervention, is fully automated, and has low cost and high reliability. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description only some embodiments of the application, and for those skilled in the art, other drawings can also be obtained without creative labor.

[0025] Figure 1 A structural schematic diagram of a sensor pairing system of a towing vehicle and a trailer is provided for the embodiments of the application.

[0026] Figure 2 A flowchart of a sensor pairing method of a towing vehicle and a trailer is provided for the embodiments of the application.

[0027] Figure 3 A flowchart of a host and sensor pairing is provided for the embodiments of the application. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solutions and advantages of the application more clear, the following will further describe the application in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the application, and are not used to limit the application. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements, unless otherwise indicated. The implementation described in the following exemplary embodiments does not represent all the implementations consistent with the embodiments of the application, but is only an example of devices and methods consistent with some aspects of the embodiments of the application as described in the appended claims.

[0029] It can be understood that the terms "first", "second", etc. used in the present application can be used herein to describe various concepts, but unless specifically stated, these concepts are not limited by these terms. These terms are only used to distinguish one concept from another. For example, without departing from the scope of the embodiments of the present application, the first information can also be referred to as the second information, and similarly, the second information can also be referred to as the first information. Depending on the context, the word "if" as used herein can be interpreted as "when" or "when" or "in response to determining".

[0030] The terms "at least one", "multiple", "each", "any" and the like used in the present application include one, two or more than two, multiple includes two or more than two, each refers to each of the corresponding multiple, and any refers to any one of the multiple.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as understood by those skilled in the art to which the present application belongs. The terms used herein are only for the purpose of describing the embodiments of the present application, and are not intended to limit the present application.

[0032] Reference Figure 1 The embodiments of the present application provide a sensor pairing system of a tractor and a trailer, the system comprising: a host and a plurality of sensors; the host and each of the sensors comprise a multi-axis motion sensing module;

[0033] The host is arranged on the tractor, and each of the sensors is arranged on the trailer.

[0034] Each of the sensors is configured to detect a first acceleration through the multi-axis motion sensing module, and send a handshake signal through a listening channel according to the first acceleration;

[0035] The host is configured to listen to the handshake signal sent by each of the sensors through the listening channel, and perform handshake communication with the sensor according to the handshake signal and a second acceleration detected by the multi-axis motion sensing module of the host.

[0036] Optionally, each of the sensors is configured to send a plurality of types of handshake signals. For example, each sensor of the present application can send a handshake signal comprising at least one of ID, GID, CH and Gsensor, but is not limited to the above four handshake signals. The actual handshake signal sent can be determined according to the requirement.

[0037] Optionally, the host is configured to read the second acceleration detected by the multi-axis motion sensing module of the host, and determine the intensity information of the handshake signal; and select the sensor with the highest intensity information and the most matched first acceleration and second acceleration to respond to the handshake communication.

[0038] Optionally, the host and each sensor are configured to perform handshake communication on a working channel.

[0039] Optionally, each sensor is further configured to enter a sleep state when the change value corresponding to the first acceleration detected by the multi-axis motion sensing module is less than a first set threshold value, and the difference between the first acceleration and the gravitational acceleration is less than a second set threshold value.

[0040] Optionally, each sensor is configured to periodically turn on the sensor by the MCU in the sleep state to detect acceleration changes using the multi-axis motion sensing module, and exit the sleep state if an acceleration change is detected, or remain in the sleep state if no acceleration change is detected.

[0041] Optionally, the host and each sensor use a preset password to encrypt the communication frame during handshake communication.

[0042] Optionally, the working communication password used by the host and each sensor is different from the handshake communication password.

[0043] Optionally, when any one of the sensors performs handshake communication with the host, the remaining sensors stop sending the handshake signal.

[0044] Reference Figure 2 The embodiments of the present application also provide a sensor pairing method for a tractor and a trailer, which is applied to the sensor pairing system for a tractor and a trailer as described in the present application, and includes the following steps S200-S230:

[0045] S200: detecting a first acceleration by each sensor through a multi-axis motion sensing module of the sensor;

[0046] S210: sending a handshake signal by each sensor through a listening channel according to the first acceleration;

[0047] S220: listening to the handshake signal sent by each sensor through the listening channel by a host;

[0048] S230: performing handshake communication with the sensor by the host according to the handshake signal and a second acceleration detected by a multi-axis motion sensing module of the host.

[0049] The following section will provide a detailed introduction and explanation of the solutions in the embodiments of this application, using specific application examples.

[0050] This embodiment provides a sensor pairing system for a tractor and trailer, including a main unit located on the tractor and several sensors located at the brake wheel hubs of the trailer. The sensors communicate with the main unit via a direct wireless connection using LoRa technology. Both the sensors and the main unit include multi-axis motion sensing modules for detecting vehicle movement.

[0051] The tractor unit's main unit uses ACC power and begins operation as soon as the tractor unit is started. It uses a monitoring channel to listen for handshake signals from the sensors. The sensors detect movement by periodically activating multi-axis motion sensing modules. When the vehicle moves, a certain acceleration change occurs, which wakes up the sensors, sending handshake information to initiate handshake communication.

[0052] The host listens for the strength information (e.g., RSSI and SNR values) when receiving handshake frames, reads the current host's motion characteristic information (e.g., acceleration), and the handshake pairing information also includes motion characteristic information (e.g., acceleration). By fusing the strength information and motion characteristic information of the received handshake signal, the host selects the sensor with the best handshake signal and the highest degree of motion characteristic information matching to pair with the host.

[0053] After a successful handshake, both the host and the sensor switch to the working channel for wireless communication.

[0054] For example, a flowchart of a host-sensor pairing process can be referred to. Figure 3 .

[0055] The energy-saving measures plan is as follows:

[0056] The sensor uses a multi-axis motion sensing module as a sleep wake-up source. When it detects that the acceleration change is not significant for a long time and is approximately equal to the acceleration due to gravity, the sensor will automatically enter a sleep state.

[0057] In sleep mode, the sensor is not always on. The MCU periodically turns on the sensor to detect abnormalities. When an abnormality is detected, the sensor is woken up to work. If there is no abnormality, it continues to sleep to achieve low power consumption.

[0058] The beneficial effects of this embodiment include:

[0059] 1. Using LoRa wireless communication technology, it has high sensitivity and strong penetration ability, and can cover a trailer truck up to 20-30 meters long in a single hop without the need for a repeater.

[0060] 2. The multi-axis motion sensing module is used to detect the abnormal movement of the trailer. When the trailer is not moving, handshake communication is not needed, and the power consumption is effectively reduced.

[0061] 3. The multi-axis motion sensing module and signal strength are used to match the trailer and the towing vehicle, and the accuracy of the single sensor is improved.

[0062] 4. The multi-axis motion sensing module uses an intermittent working mechanism to avoid energy loss caused by long-term operation of the sensor.

[0063] 5. In the handshake communication process, the communication frame is encrypted using a preset password to avoid detection.

[0064] 6. The working communication password is different from the handshake communication password to improve reliability.

[0065] 7. The various sensors on the trailer are used as a whole, and a communication parameter is used. As long as one sensor successfully handshakes with the host of the towing vehicle, other sensors can skip the handshake process, reducing power consumption and improving efficiency.

[0066] The embodiments described in the embodiments of the present application are used to more clearly illustrate the technical solutions of the embodiments of the present application, and do not constitute a limitation on the technical solutions provided by the embodiments of the present application. Those skilled in the art can know that with the evolution of technology and the appearance of new application scenarios, the technical solutions provided by the embodiments of the present application are also applicable to similar technical problems.

[0067] Those skilled in the art can understand that the technical solutions shown in the figures do not constitute a limitation on the embodiments of the present application, and can include more or fewer steps than the figures shown, or combine certain steps or different steps.

[0068] Those skilled in the art can understand that all or some steps in the method disclosed above, the functions of the modules / units in the system, and the device can be implemented as software, firmware, hardware, and appropriate combinations thereof.

[0069] The terms "first", "second", "third", "fourth" and the like (if any) in the specification of the present application and the above-described figures are used to distinguish similar objects, and do not necessarily have to be used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device including a series of steps or units does not have to be limited to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0070] It should be understood that, in the present application, "at least one" means one or more, and "multiple" means two or more. "And / or" is used to describe the relationship between the associated objects, which means that there can be three relationships, for example, "A and / or B" can represent three cases: only A exists, only B exists, and A and B exist at the same time, where A and B can be singular or plural. The character " / " generally represents that the associated objects before and after are in an "or" relationship. "At least one of the following" or similar expressions means any combination of these items, including any combination of single or multiple items. For example, at least one of a, b or c can mean a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, and c can be single or multiple.

[0071] The preferred embodiments of the embodiments of the present application are described above with reference to the accompanying drawings, and are not limited to the scope of the embodiments of the present application. Any modifications, equivalent replacements and improvements made by those skilled in the art without departing from the scope and essence of the embodiments of the present application shall be within the scope of the embodiments of the present application.

Claims

1. A tractor and trailer sensor pairing system, characterized by, The system comprises a host and a plurality of sensors; the host and each of the sensors comprise a multi-axis motion sensing module; The host is arranged on a towing vehicle, and each of the sensors is arranged on a trailer; Each of the sensors is configured to detect a first acceleration by the multi-axis motion sensing module, and send a handshake signal through a listening channel according to the first acceleration; The host is configured to listen to the handshake signal sent by each of the sensors through the listening channel, and perform handshake communication with the sensors according to the handshake signal and a second acceleration detected by the multi-axis motion sensing module of the host; The host is configured to read the second acceleration detected by the multi-axis motion sensing module of the host, determine strength information of the handshake signal, select the sensor with the highest strength information and the first acceleration and the second acceleration that best match each other for response, and then perform handshake communication; Each of the sensors is further configured to enter a sleep state when a change value of the first acceleration detected by the multi-axis motion sensing module is less than a first set threshold value, and a difference between the first acceleration and a gravitational acceleration is less than a second set threshold value. The sensor pairing method of the system comprises the following steps: Each of the sensors detects a first acceleration by a multi-axis motion sensing module of the sensor; Each of the sensors sends a handshake signal through a listening channel according to the first acceleration; The host listens to the handshake signal sent by each of the sensors through the listening channel; The host performs handshake communication with the sensors according to the handshake signal and a second acceleration detected by the multi-axis motion sensing module of the host.

2. A tractor to trailer sensor pairing system according to claim 1, wherein, Each of the sensors is configured to send a plurality of types of handshake signals.

3. A tractor to trailer sensor pairing system according to claim 1, wherein, The host and each of the sensors are configured to perform handshake communication on a working channel.

4. A tractor to trailer sensor pairing system according to claim 1, wherein, Each of the sensors is configured to periodically open the sensor by an MCU to detect acceleration change by the multi-axis motion sensing module in the sleep state, exit the sleep state if acceleration change is detected, and remain in the sleep state if no acceleration change is detected.

5. A tractor to trailer sensor pairing system according to claim 1, wherein, The host and each of the sensors use a preset password to encrypt a communication frame during handshake communication.

6. A tractor to trailer sensor pairing system according to claim 5, wherein, The working communication password and the handshake communication password used by the host and each of the sensors are different.

7. A tractor to trailer sensor pairing system according to any one of claims 1 to 6, wherein, When any one of the sensors performs handshake communication with the host, the remaining sensors stop sending the handshake signal.

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