WO2014181511A1 - Theft sensory system, and transmission device and reception device constituting said system - Google Patents

Abstract

A theft sensory system provided with: a transmission device (10) having an acquisition means (11a) for acquiring acceleration acting on a tire of a vehicle, and a transmission means (11b) for transmitting acceleration information based on the acceleration; and a reception device (20) having a reception means (21a) for receiving the acceleration information, an assessment means (21b) for assessing whether or not there has been a theft of the tire on the basis of the acceleration information, and an output means (21c) for issuing an output notifying of the theft on the basis of the assessment result.

Description

Theft detection system, transmitter and receiver constituting the system Cross-reference of related applications

This disclosure is based on Japanese Application No. 2013-98802 filed on May 8, 2013, the contents of which are incorporated herein by reference.

The present disclosure relates to a theft detection system that detects a theft in a vehicle.

A tire pressure monitoring system called TPMS (Tire Pressure Monitoring System) is known. In this system, the air pressure of the tires attached to the vehicle is adjusted according to the road surface condition and the wind direction, and economical driving according to the traveling road such as an expressway or a general road is realized.

Conventionally, there has been proposed a system for judging whether the vehicle is stolen or towed by constantly monitoring the air pressure using such a tire air pressure monitoring system (see, for example, Patent Document 1). In this system, the tire air pressure is compared with a reference value, and it is determined whether or not the difference between the air pressure and the reference value is within an allowable error range.

However, in the case of the theft of a single tire attached to a vehicle, the change in tire air pressure is small, and thus there is a possibility that the theft cannot be detected even if the conventional technology is applied. In particular, in the case of theft of a spare tire, the change in air pressure is expected to become even smaller.

JP 2005-138826 A

The present disclosure provides a theft detection system capable of detecting a theft of a single tire attached to a vehicle and capable of quickly detecting the theft, and a transmission device and a reception device constituting the system. With the goal.

In the first aspect of the present disclosure, the theft detection system includes a transmission device and a reception device. The transmission device includes acquisition means for acquiring acceleration acting on a tire attached to the vehicle, and transmission means for transmitting acceleration information based on the acceleration acquired by the acquisition means. A receiving device for receiving the acceleration information transmitted by the transmitting unit; and a determining unit for determining whether the tire has been stolen based on the acceleration information received by the receiving unit; And an output means for outputting a notification of theft based on a determination result by the determination means.

In the above theft detection system, because the tire theft is judged based on the acceleration information based on the acceleration acting on each tire and an output for notifying the theft is performed, the theft of the tire alone attached to the vehicle can be detected. Compared to air pressure, theft can be detected more quickly.

In the second aspect of the present disclosure, the transmission device constitutes the theft detection system of the first aspect. In this transmission device, the tire theft is judged based on the acceleration information based on the acceleration acting on each tire and an output for notifying the theft is made, so that it is possible to detect the theft of a single tire attached to the vehicle and In comparison, theft can be detected quickly.

In the third aspect of the present disclosure, the receiving device constitutes the theft detection system of the first aspect. In this receiving device, since the tire theft is judged by the acceleration information based on the acceleration acting on each tire and an output for notifying the theft is performed, the theft of the tire alone attached to the vehicle can be detected, and the pneumatic pressure can be detected. In comparison, theft can be detected quickly.

The above and other objects, features and advantages of the present disclosure will become more apparent from the following detailed description with reference to the accompanying drawings. The drawing
FIG. 1 is an explanatory diagram showing a state in which the theft detection system is mounted on a vehicle, FIG. 2A is a block diagram showing the configuration of the transmitting device, FIG. 2B is a block diagram showing the configuration of the receiving device, FIG. 3 is a flowchart showing a transmission process in the transmission device, FIG. 4 is a flowchart illustrating a reception process in the reception device. FIG. 5A is an explanatory diagram schematically illustrating an acceleration sensor attached to a tire, and FIG. 5B is an explanatory diagram illustrating acceleration during acceleration traveling.

Hereinafter, an embodiment of the present disclosure will be described based on the drawings.

As shown in FIG. 1, the theft detection system of the present embodiment is mounted on a vehicle 100 and used. The theft detection system is configured as a so-called TPMS including a transmission device 10 and a reception device 20.

The transmission device 10 is disposed on four tires that can be run attached to the vehicle 100 and a spare tire provided at the rear.

As shown in FIG. 2 (a), the transmission device 10 is configured around a transmission-side control unit 11. A sensing unit 12, an air pressure adjustment unit 13, and a transmission side wireless unit 14 are connected to the transmission side control unit 11.

The transmission-side control unit 11 is a computer having a CPU, ROM, RAM, I / O, and a bus line for connecting them. Thereby, the transmission side control part 11 manages control of the transmission apparatus 10 whole.

The sensing unit 12 has a configuration for acquiring various information related to the mounted tire. Specifically, the tire air pressure, the tire internal temperature, and the acceleration acting on the tire are acquired and output to the transmission side control unit 11.

The air pressure adjusting unit 13 is configured to adjust the tire air pressure in accordance with an instruction from the transmission side control unit 11. For example, when running at high speed, the tire pressure is adjusted to be relatively high.

The transmission side wireless unit 14 has an antenna 15 and is configured to enable wireless communication with the receiving device 20. Specifically, the information on the tire pressure, the internal temperature, and the acceleration described above is transmitted to the receiving device 20 according to an instruction from the transmission-side control unit 11. The air pressure and the internal temperature are transmitted at a timing of once per second, and the acceleration information is transmitted when an acceleration of a predetermined value or more is detected. In addition, the transmission-side radio unit 14 receives the air pressure adjustment signal from the reception device 20 and outputs it to the transmission-side control unit 11. Thereby, the transmission side control unit 11 adjusts the tire air pressure via the air pressure adjustment unit 13. Here, the “acceleration information” may be the acceleration itself or information obtained by processing the acceleration.

As shown in FIG. 2B, the receiving device 20 is configured around a receiving-side control unit 21. A communication unit 22, an output unit 23, and a reception side wireless unit 24 are connected to the reception side control unit 21.

The reception-side control unit 21 is a computer including a CPU, ROM, RAM, I / O, and a bus line that connects them. Thereby, the receiving side control part 21 manages control of the receiver 20 whole.

The communication unit 22 is configured to enable data communication with an external center (not shown).

The output unit 23 is embodied as a display that is arranged in the passenger compartment of the vehicle 100 or a speaker that can output an alarm. It is also possible to light a predetermined lamp as part of the alarm output via the output unit 23. Thereby, information such as tire air pressure is displayed to the user via the display. Further, when the theft occurs, an alarm output such as notifying the theft from a speaker or blinking a hazard lamp is performed.

The reception-side wireless unit 24 has an antenna 25 and is configured to enable wireless communication with the transmission device 10. Specifically, tire pressure, temperature, and acceleration information from the transmission device 10 is received and output to the reception-side control unit 21.

Information from the vehicle speed detection unit 31, the outside air temperature detection unit 32, the weather detection unit 33, the road surface information detection unit 34, the brake detection unit 35, and the travel distance detection unit 36 is input to the reception side control unit 21. It has become. As a result, the reception-side control unit 21 calculates the optimal tire pressure based on information such as whether the vehicle is traveling at high speed, whether it is raining, whether the road surface is slippery, and the like. Based on various information from the apparatus 10, an air pressure adjustment signal is output via the reception-side radio unit 24.

Based on such a basic configuration, the present embodiment is characterized in that the theft of a single tire is detected based on the acceleration acting on the tire transmitted from the transmission device 10 to the reception device 20.

Therefore, next, transmission processing in the transmission apparatus 10 will be described based on the flowchart of FIG. This transmission process is always executed regardless of the vehicle state, and is repeatedly executed by the transmission-side control unit 11 of the transmission device 10.

In the first S100, it is determined whether or not acceleration is detected. This process is affirmed when the acceleration input from the sensing unit 12 is greater than or equal to a predetermined value. If it is determined that acceleration has been detected (S100: YES), the process proceeds to S110. On the other hand, when it is determined that the acceleration is not detected (S100: NO), the process of S110 is not executed and the transmission process is terminated.

In S110, acceleration information is transmitted. Since the transmission device 10 is arranged on the four tires and the spare tire as described above, acceleration information is transmitted from each tire separately to the reception device 20.

Next, the reception process in the reception device 20 will be described based on the flowchart of FIG. This reception process is always executed regardless of the vehicle state, and is repeatedly executed by the reception-side control unit 21 of the reception device 20.

In first S200, it is determined whether or not the engine is stopped. For example, an accessory switch (ACC), an ignition switch (IG), and an engine state indicate the following four states. That is,
(1) ACC: ON, IG: ON, engine running (2) ACC: ON, IG: ON, engine stopped (3) ACC: ON, IG: OFF, engine stopped (4) ACC: OFF, IG : Off and the engine is stopped.

In S200, an affirmative determination is made in cases (2) to (4) above. If it is determined that the engine is stopped (S200: YES), the process proceeds to S210. On the other hand, when it is determined that the engine is not stopped (S200: NO), the subsequent processing is not executed and the reception processing is terminated.

In S210, it is determined whether or not acceleration information has been received. This process corresponds to S110 in FIG. If it is determined that the acceleration information has been received (S210: YES), the process proceeds to S220. On the other hand, when it is determined that the acceleration information has not been received (S210: NO), the subsequent processing is not executed and the reception processing is terminated.

In S220, it is determined whether or not the information is for one tire. This process is to determine whether or not the acceleration information received in S210 is from the transmission device 10 arranged in one tire. If it is determined that the information is for one tire (S220: YES), the process proceeds to S240. On the other hand, when it is determined that the information is not for one tire (S220: NO), that is, when the information is from the transmission device 10 arranged in a plurality of tires, the process proceeds to S230.

In S230, it is determined whether or not the acceleration is abnormal. Even when the engine is stopped, it is conceivable that acceleration information is transmitted by, for example, a tow truck movement. At this time, acceleration during running is obtained. For example, FIG. 5A schematically shows an acceleration sensor constituting the sensing unit 12. As shown in FIG. 5A, when the acceleration sensor is attached to the tire, the direction parallel to the tire rotation axis is the Y axis, the tire rotation direction is the X axis, and the tire radial direction is Assuming that the Z-axis is used, the acceleration shown in FIG. 5B is obtained for the four tires when the vehicle is accelerated. Therefore, for example, when a wrecker movement is performed, it is conceivable that acceleration is detected from any one of the two front and rear tires, but the acceleration from the transmission device 10 disposed on the two tires is like this. The possibility of theft is high when the waveform is not related and is not related and disjoint.

If it is determined in S230 that the acceleration is abnormal (S230: YES), the process proceeds to S240. On the other hand, when it is determined that the acceleration is normal (S230: NO), the process of S240 and S250 is not executed, and the reception process is terminated.

In S240, where an affirmative determination is made in S220 or an affirmative determination is made in S230, an alarm is output. In this process, an alarm sound is output from the vehicle 100 by a speaker or the like constituting the output unit 23. Further, the hazard lamp blinks via the output unit 23.

In subsequent S250, information is output to the outside. This process notifies the center of the possibility of tire theft via the communication unit 22. As a result, the center is notified of the possibility of theft of the tire to the user's portable terminal or the like. The notification unit to the center may be configured using DCM (Data Communication Module).

As described in detail above, in the present embodiment, when acceleration is detected in the transmission processing of the transmission device 10 (S100: YES in FIG. 3), acceleration information based on the acceleration is transmitted (S110). In the reception process of the receiving device 20, when this acceleration information is received (S210 in FIG. 4), it is determined whether or not the tire has been stolen (S220, S230), and an alarm is output via the output unit 23 ( S240), information is output to the outside via the communication unit 22 (S250).

That is, a transmission device 10 having an acquisition unit 11a that acquires acceleration acting on a tire attached to a vehicle, and a transmission unit 11b that transmits acceleration information based on the acceleration acquired by the acquisition unit 11a, and a transmission unit 11b The receiving means 21a for receiving the acceleration information transmitted in the above, the judging means 21b for judging whether or not the tire has been stolen based on the acceleration information received by the receiving means 21a, and the judgment result by the judging means 21b And a receiving device 20 having an output means 21c for outputting the notification of theft.

In other words, since the tire theft is judged based on the acceleration information based on the acceleration acting on each tire and an output that notifies the theft is performed, it is possible to detect the theft of a single tire attached to the vehicle and to use the change in air pressure Compared to the case, theft can be detected quickly.

Further, in the present embodiment, an alarm sound is output from the vehicle 100 by a speaker or the like constituting the output unit 23, and a hazard lamp is blinked through the output unit 23 (S240 in FIG. 4). That is, the output means 21c performs output by at least one of sound and light. Thereby, when there is a theft, the emergency situation in the vehicle 100 can be informed to the surroundings.

Furthermore, in this embodiment, the possibility of theft of the tire is notified from the center to the user's portable terminal or the like by notifying the center of the possibility of theft of the tire via the communication unit 22 (S250 in FIG. 4). It is notified that there is. That is, the output unit 21c transmits to the external device that there is a possibility of theft. Thereby, it is possible to quickly deal with theft in the vehicle 100.

Further, in the present embodiment, it is determined whether or not the acceleration information from the transmission device 10 is from the transmission device 10 arranged in one tire (S220 in FIG. 4). When it is determined that there is an alarm (S220: YES), an alarm is output (S240, S250). That is, when the acceleration information is information from one tire, the determination unit 21b determines that the tire has been stolen. Thereby, theft of the tire can be reliably detected.

Furthermore, in the present embodiment, when the acceleration information is from a plurality of tires (S220: NO in FIG. 4), an acceleration different from that during normal acceleration travel is obtained (S230: YES). Alarm output is performed (S240, S250). That is, when the acceleration information is information from a plurality of tires, the determination unit 21b determines that the tire has been stolen when the acceleration information of each tire is not relevant. Thereby, theft of the tire can be reliably detected.

In this embodiment, since TPMS is used for the theft detection system, the sensing unit 12 is usually provided with an acceleration sensor. Therefore, it is not necessary to add a new configuration, and cost increase can be suppressed.

As described above, the present disclosure is not limited to the above-described embodiment, and can be implemented in various forms without departing from the technical scope thereof.

In the above embodiment, a notification is sent from the center to the user's mobile terminal. However, in addition to or instead of this configuration, a notification may be sent from the center to a dealer or a security company.

Here, the flowchart or the process of the flowchart described in this application is configured by a plurality of sections (or referred to as steps), and each section is expressed as S100, for example. Furthermore, each section can be divided into a plurality of subsections, while a plurality of sections can be combined into one section. Further, each section configured in this manner can be referred to as a device, module, or means.

Although the present disclosure has been described based on the embodiments, it is understood that the present disclosure is not limited to the embodiments and structures. The present disclosure includes various modifications and modifications within the equivalent range. In addition, various combinations and forms, as well as other combinations and forms including only one element, more or less, are within the scope and spirit of the present disclosure.

Claims (10)

1. A transmission device (10);
   A receiving device (20),
   The transmitting device (10)
   Acquisition means (11a) for acquiring acceleration acting on a tire attached to the vehicle;
   Transmission means (11b) for transmitting acceleration information based on the acceleration acquired by the acquisition means;
   The receiving device (20)
   Receiving means (21a) for receiving the acceleration information transmitted by the transmitting means;
   Determination means (21b) for determining whether the tire has been stolen based on the acceleration information received by the reception means;
   Output means (21c) for performing an output informing theft based on the determination result by the determination means;
   Theft detection system.
2. The output means performs an output notifying the theft on condition that the engine of the vehicle is stopped (S200: YES, S240, S250).
   The theft detection system according to claim 1.
3. The output means outputs the theft by at least one of sound and light (S240).
   The theft detection system according to claim 1 or 2.
4. The output means transmits the possibility of theft to an external device (S250).
   The theft detection system according to any one of claims 1 to 3.
5. When the acceleration information is information from one tire, the determination means determines that the tire has been stolen (S220: YES).
   The theft detection system according to any one of claims 1 to 4.
6. When the acceleration information is information from a plurality of tires, the determination means determines that the tire has been stolen when the acceleration information of each tire is not relevant (S230: YES).
   The theft detection system according to any one of claims 1 to 5.
7. The theft detection system according to any one of claims 6 to 7, wherein the determination unit determines that the acceleration information of each tire is not relevant when the acceleration information of each tire is different from a predetermined pattern.
8. The rotation direction of each tire is defined as the first axis, and the radial direction of each tire is defined as the second axis.
   When the acceleration of the first axis of each tire is different from the first pattern, or the acceleration of the second axis of each tire is different from the second pattern, the determining means determines that the tire has been stolen.
   The first pattern is a predetermined waveform in which acceleration vibrates with time, the center of vibration is substantially constant, and its vibration period shortens with time.
   8. The theft detection system according to claim 7, wherein the second pattern is a predetermined waveform in which acceleration vibrates with time, a center of vibration increases with time, and a vibration cycle thereof decreases with time. .
9. A transmission device constituting the theft detection system according to any one of claims 1 to 8.
10. A receiving device constituting the theft detection system according to any one of claims 1 to 8.
    

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