WO2023007715A1 - Système de détection de chute d'élément de fixation de roue - Google Patents

Système de détection de chute d'élément de fixation de roue Download PDF

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Publication number
WO2023007715A1
WO2023007715A1 PCT/JP2021/028405 JP2021028405W WO2023007715A1 WO 2023007715 A1 WO2023007715 A1 WO 2023007715A1 JP 2021028405 W JP2021028405 W JP 2021028405W WO 2023007715 A1 WO2023007715 A1 WO 2023007715A1
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WO
WIPO (PCT)
Prior art keywords
fixing member
wheel fixing
transmitter
receiver
wheel
Prior art date
Application number
PCT/JP2021/028405
Other languages
English (en)
Japanese (ja)
Inventor
泰久 辻田
智哉 河合
Original Assignee
太平洋工業株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 太平洋工業株式会社 filed Critical 太平洋工業株式会社
Priority to PCT/JP2021/028405 priority Critical patent/WO2023007715A1/fr
Publication of WO2023007715A1 publication Critical patent/WO2023007715A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B3/00—Disc wheels, i.e. wheels with load-supporting disc body
    • B60B3/14—Attaching disc body to hub ; Wheel adapters
    • B60B3/16—Attaching disc body to hub ; Wheel adapters by bolts or the like
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C23/00—Devices for measuring, signalling, controlling, or distributing tyre pressure or temperature, specially adapted for mounting on vehicles; Arrangement of tyre inflating devices on vehicles, e.g. of pumps or of tanks; Tyre cooling arrangements
    • B60C23/02—Signalling devices actuated by tyre pressure
    • B60C23/04—Signalling devices actuated by tyre pressure mounted on the wheel or tyre

Definitions

  • the present disclosure relates to a wheel fixing member dropping detection system.
  • a vehicle includes multiple axles, multiple hubs, multiple wheels, and multiple wheel fixing members.
  • One hub is provided at each end of the axle.
  • the wheel is rotatable integrally with the axle by fastening a wheel fixing member to the hub.
  • the fastening state of the wheel fixing member may be inspected.
  • Patent Literature 1 discloses an indicator that is provided so as to rotate integrally with a wheel fixing member. When inspecting the fastening state of the wheel fixing member, the inspection is performed by an inspector visually checking the indicator.
  • the wheel fixing member Even if the wheel fixing member is inspected, the wheel fixing member may come off.
  • a wheel fixing member dropping detection system including a transmitter provided integrally with a wheel fixing member for fixing a wheel to an axle, and a receiver mounted on a vehicle.
  • the transmitter includes a transmitter storage unit configured to store identification information, and a transmission circuit configured to transmit a radio signal including the identification information
  • the receiver includes the A receiver control device configured to acquire the identification information included in the radio signal, wherein the receiver control device determines that the wheel fixing member has fallen off when the identification information is no longer acquired. configured to determine.
  • the transmitter When the wheel fixing member falls off, the transmitter also falls off together with the wheel fixing member. Due to the dropout of the transmitter, the receiver control device cannot acquire the identification information of the dropped transmitter. Therefore, the receiver control device can determine that the wheel fixing member has fallen off when the identification information is no longer acquired.
  • the wheel fixing member drop-off detection system is a repeater configured to receive the wireless signal and transmit a relay signal including the identification information included in the wireless signal. may further include
  • the repeater may be configured to transmit the relay signal including the identification information of a plurality of the transmitters.
  • the transmitter may include a battery, and the transmitter may be configured to transmit the wireless signal by power of the battery.
  • the wheel fixing member drop-off detection system further includes a road receiver configured to be installed on a road, wherein the road receiver is transmitted from the same transmitter. It may be configured such that it is determined that the wheel fixing member has fallen off when the wireless signal is repeatedly received for a predetermined time or longer or for a predetermined number of times or longer.
  • the repeater is a reading device capable of transmitting radio waves to the transmitter and configured to receive the wireless signal
  • the transmitter comprises:
  • the radio signal may be transmitted by power obtained from the radio wave.
  • the wheel fixing member drop-off detection system further includes a road receiver configured to be installed on a road, wherein the road receiver receives the relay signal transmitted from the repeater. It may be configured to determine from the signal that the wheel fixing member has fallen off.
  • the wheel fixing member falling detection system may further include a server and a communication device that transmits information indicating that the wheel fixing member has fallen off to the server. .
  • FIG. 1 is a schematic configuration diagram of a vehicle system in a first embodiment
  • FIG. 2 is a schematic configuration diagram of a vehicle included in the vehicle system of FIG. 1
  • FIG. 2 is an exploded perspective view of a hub included in the vehicle in FIG. 1, a wheel included in the vehicle in FIG. 1, and a wheel fixing member included in the vehicle in FIG. 1.
  • FIG. FIG. 2 is a schematic configuration diagram of a wheel fixing member dropping detection system included in the vehicle system of FIG. 1
  • FIG. 5 is a flow chart showing a first omission detection process performed by the transmitter and receiver of FIG. 4
  • FIG. FIG. 5 is a flowchart showing a second dropping detection process performed by the road receiver of FIG. 4
  • FIG. 3 is a schematic configuration diagram of the wheel fixing member dropping detection system in the embodiment of FIG. 2 ;
  • Figure 8 is a front view of the wheel showing the position where the reader of Figure 7 is provided;
  • FIG. 8 is a flow chart showing a relay process performed by the reading device of FIG. 7;
  • FIG. 8 is a flowchart showing a second dropping detection process performed by the road receiver of FIG. 7;
  • FIG. 11 is a schematic configuration diagram of a wheel fixing member falling-off detection system in a modified example;
  • the vehicle system 10 includes a vehicle 11 and a wheel fixing member dropping detection system 20 .
  • the wheel fixing member falling detection system 20 includes a transmitter 21 , a receiver 31 , a road receiver 41 and a server 51 .
  • the vehicle 11 includes a plurality of axles 12, a plurality of hubs 13, a plurality of wheels 15, a plurality of wheel fixing members 16, and a notification device 17.
  • Vehicle 11 may be of any type, such as a truck, passenger car, or commercial vehicle.
  • one hub 13 is provided at each end of the axle 12 .
  • the hub 13 can rotate integrally with the axle 12 .
  • the hub 13 has a plurality of hub bolts 14 .
  • the plurality of hub bolts 14 are spaced apart from each other in the rotational direction of the axle 12 .
  • the wheel 15 is fixed to the axle 12 by fastening a wheel fixing member 16 to the hub bolt 14 passing through the wheel 15 .
  • Wheel 15 is fixed to axle 12 via hub 13 .
  • a case where one wheel 15 is provided on each end of each axle 12 will be described. good too. That is, each end of the axle 12 may be provided with one wheel for a single tire, or two wheels for a double tire.
  • the wheel fixing member 16 is a wheel nut.
  • a wheel fixing member 16 is fastened to the hub 13 .
  • the wheel fixing member 16 is a wheel nut fastened to the hub bolt 14 provided on the hub 13 .
  • the transmitter 21 is provided integrally with the wheel fixing member 16. Transmitter 21 may be attached to wheel fixture 16 in any manner. For example, the transmitter 21 may be attached to the wheel fixing member 16 with an adhesive, or may be attached to the wheel fixing member 16 by being fitted into the wheel fixing member 16 .
  • the transmitter 21 includes a transmitter control device 22, a transmission circuit 25, a transmission antenna 26, and a battery 27.
  • the transmitter control device 22 includes a processor 23 and a transmitter storage section 24 .
  • the processor 23 include an MPU (Micro Processing Unit), a CPU (Central Processing Unit), and a DSP (Digital Signal Processor).
  • the transmitter storage unit 24 includes RAM (Random Access Memory) and ROM (Read Only Memory). Transmitter storage 24 stores program code or instructions configured to cause processor 23 to perform processing.
  • the transmitter control device 22 may be configured by a hardware circuit such as ASIC or FPGA.
  • the processing circuitry, transmitter controller 22, may include one or more processors operating according to a computer program, one or more hardware circuits such as ASICs or FPGAs, or a combination thereof.
  • ROM and RAM or computer-readable media include any available media that can be accessed by a general purpose or special purpose computer.
  • the transmitter storage unit 24 stores an ID code indicating unique identification information of the corresponding transmitter 21 .
  • the transmitter control device 22 generates data.
  • the data is digital data and binary data.
  • the data is data indicating an ID code.
  • the transmitter controller 22 inputs data to the transmitter circuit 25 .
  • the transmission circuit 25 transmits from the transmission antenna 26 a radio signal that has been modulated according to the data input from the transmitter control device 22 .
  • a radio signal including the ID code is transmitted from the transmission circuit 25 .
  • a radio signal is a signal in a predetermined frequency band. Examples of frequency bands include the LF band, MF band, HF band, VHF band, UHF band, and 2.4 GHz band.
  • the transmitter controller 22 is configured to cause the transmitter circuit 25 to transmit radio signals at predetermined transmission intervals.
  • the predetermined transmission interval may be a predetermined constant interval, or may be an interval that randomly fluctuates between a predetermined upper limit and lower limit.
  • the battery 27 is the power source for the transmitter 21 .
  • the battery 27 may be a primary battery or a secondary battery.
  • the transmitter 21 transmits radio signals by being supplied with power from the battery 27 .
  • the receiver 31 includes a receiver control device 32 , a receiving antenna 35 , a receiving circuit 36 and a communication device 37 .
  • Receiver 31 is mounted on vehicle 11 .
  • the receiver control device 32 includes a processor 33 and a storage section 34.
  • the processor 33 can include, for example, an MPU, CPU, and DSP.
  • the storage unit 34 includes ROM and RAM. Storage unit 34 stores program code or instructions configured to cause processor 33 to perform processing.
  • the receiver control device 32 may be configured by a hardware circuit such as ASIC or FPGA.
  • the processing circuitry, receiver controller 32 may include one or more processors operating according to a computer program, one or more hardware circuits such as ASICs or FPGAs, or a combination thereof.
  • ROM and RAM or computer-readable media include any available media that can be accessed by a general purpose or special purpose computer.
  • the ID codes of all the transmitters 21 are stored in the storage unit 34.
  • the ID code stored in the storage unit 34 may be associated with the position of the wheel fixing member 16 . That is, the ID code may be stored so that the receiver control device 32 can recognize the position of the transmitter 21 that transmitted the radio signal.
  • the position of the wheel fixing member 16 is the position of the wheel 15 on which the wheel fixing member 16 is provided. For example, in the case of the wheel fixing member 16 for fixing the wheel 15 provided on the front right of the vehicle 11, the ID code of the transmitter 21 provided on the wheel fixing member 16 is associated with the front right of the vehicle 11.
  • the receiving antenna 35 receives the radio signal transmitted from each transmitter 21 .
  • the receiving circuit 36 demodulates the radio signal received via the receiving antenna 35 to obtain data.
  • the receiving circuit 36 outputs data to the receiver controller 32 . As a result, the receiver control device 32 acquires the ID code.
  • the receiver control device 32 gives a command to the notification device 17.
  • the notification device 17 notifies according to the command.
  • the notification device 17 is a device for notifying passengers of the vehicle 11 that the wheel fixing member 16 has fallen off.
  • the notification device 17 may be any device, such as a device that notifies by sound, a device that notifies by lighting a lamp, or a device that notifies by displaying characters or marks.
  • the communication device 37 is a network device that includes a communication control unit, ports, etc., and can transmit and receive information through the communication network NW.
  • the communication device 37 is connected to the server 51 via the communication network NW.
  • the road receiver 41 includes a road receiver control device 42 , a road receiving antenna 45 , a road receiving circuit 46 and a road communication device 47 .
  • a plurality of road receivers 41 are provided at predetermined intervals along the road on which the vehicle 11 travels.
  • the road receiver control device 42 includes a processor 43 and a storage unit 44 .
  • the processor 43 can include, for example, an MPU, CPU, and DSP.
  • the storage unit 44 includes ROM and RAM. Storage unit 44 stores program code or instructions configured to cause processor 43 to perform processing.
  • the road receiver control device 42 may be configured by a hardware circuit such as ASIC or FPGA.
  • the processing circuitry roadway receiver controller 42 may include one or more processors operating according to a computer program, one or more hardware circuits such as ASICs or FPGAs, or a combination thereof.
  • ROM and RAM or computer-readable media include any available media that can be accessed by a general purpose or special purpose computer.
  • the road receiving antenna 45 receives the radio signal transmitted from each transmitter 21 .
  • the road reception circuit 46 demodulates the radio signal received via the road reception antenna 45 to obtain data.
  • the road receiving circuit 46 outputs the data to the road receiver control device 42 . As a result, the road receiving circuit 46 acquires the ID code.
  • the road communication device 47 is a network device that includes a communication control unit, ports, etc., and can transmit and receive information through the communication network NW.
  • the road communication device 47 is connected to the server 51 via the communication network NW.
  • the transmitter 21 and receiver 31 perform the first omission detection process.
  • the first omission detection process is repeatedly performed at a predetermined cycle.
  • step S1 the transmitter control device 22 transmits radio signals.
  • step S2 the receiver control device 32 acquires an ID code from the radio signal.
  • the receiver control device 32 determines whether any wheel fixing member 16 has fallen off. For each ID code stored in the storage unit 34, the receiver control device 32 determines whether or not the ID code has been acquired from the radio signal. Depending on the surrounding environment, the receiver 31 may not be able to receive the radio signal even though the transmitter 21 is transmitting the radio signal. Therefore, if the same ID code has not been obtained continuously for a predetermined time or longer, the receiver control device 32 determines that the ID code has not been obtained. When the ID codes of all the transmitters 21 are acquired, the receiver control device 32 determines that none of the wheel fixing members 16 has fallen off. If the receiver control device 32 cannot acquire the ID code of at least one transmitter 21, it determines that one of the wheel fixing members 16 has fallen off.
  • the receiver control device 32 Since the ID code is transmitted by a radio signal, it can be said that the receiver control device 32 detects the dropout of the wheel fixing member 16 based on the presence or absence of the radio signal. If the storage unit 34 stores the position of the wheel 15 in association with the ID code, the receiver control device 32 may identify the position of the dropped wheel fixing member 16 . When the ID code cannot be acquired, the receiver control device 32 may determine that the wheel fixing member 16 provided at the position of the wheel 15 associated with the ID code is loose. For example, if the front right of the vehicle 11 is associated with the unacquirable ID code as the position of the wheel fixing member 16, the receiver control device 32 determines the wheel for fixing the front right wheel 15 of the vehicle 11. It may be determined that the fixing member 16 has loosened. If the determination result of step S3 is affirmative, the receiver control device 32 performs the processing of step S4. If the determination result in step S3 is negative, the receiver control device 32 terminates the first omission detection process.
  • step S4 the receiver control device 32 notifies the notification device 17.
  • step S5 the receiver control device 32 transmits information to the server 51 indicating that the wheel fixing member 16 has fallen off.
  • the receiver control device 32 may transmit information indicating the current position of the vehicle 11 to the server 51 .
  • Information indicating the current position of the vehicle 11 can be obtained from, for example, a satellite navigation device mounted on the vehicle 11 . Satellite navigation devices measure positions using satellite signals transmitted from GNSS (Global Navigation Satellite System) satellites.
  • GNSS Global Navigation Satellite System
  • the road receiver 41 performs the second omission detection process.
  • the second omission detection process is repeatedly performed at a predetermined cycle.
  • the second dropping detection process is a process of determining whether or not the dropped wheel fixing member 16 exists on the road.
  • step S11 the road receiver control device 42 acquires an ID code from the radio signal.
  • step S12 the road receiver control device 42 determines whether or not the wheel fixing member 16 has fallen off, in other words, whether or not it has fallen on the road.
  • the road receiver control device 42 judges that the wheel fixing member 16 has fallen off when the wireless signal transmitted from the same transmitter 21 is repeatedly and continuously received. Specifically, if the same ID code is repeatedly acquired for a predetermined time or more, or a predetermined number of times, the road receiver control device 42 detects that the wheel fixing member 16 has fallen off. determined to be
  • the predetermined time is set to be longer than the time required for the vehicle 11 to stop temporarily due to a road sign or signal. The predetermined number of times is set similarly to the predetermined time. If the determination result of step S12 is affirmative, the road receiver control device 42 performs the processing of step S13. If the determination result in step S12 is negative, the road receiver control device 42 terminates the second dropping detection process.
  • step S13 the road receiver control device 42 transmits information to the server 51 indicating that the wheel fixing member 16 has fallen off.
  • the road receiver control device 42 may transmit information indicating the position of the road receiver 41 to the server 51 . Since the position of the road receiver 41 does not change, information indicating the position of the road receiver 41 may be stored in advance in the storage unit 44 and this information may be transmitted to the server 51 . Further, the road receiver control device 42 may transmit to the server 51 information from which the server 51 can derive the position of the road receiver 41 . For example, if the server 51 has a database that stores the position in association with the ID code of the road receiver 41, the road receiver control device 42 transmits the ID code of the road receiver 41. good too. After completing the process of step S13, the road receiver control device 42 ends the second dropping detection process.
  • information indicating that the wheel fixing member 16 has fallen off is transmitted from the receiver 31 and the road receiver 41 to the server 51 .
  • the server 51 can recognize that the wheel fixing member 16 has come off.
  • the current position of the vehicle 11 can be regarded as the position where the wheel fixing member 16 has fallen off.
  • the position of the road receiver 41 can be regarded as the position where the wheel fixing member 16 has fallen off.
  • the server 51 provides services to users. Services are provided as a cloud. A cloud is one form of computer usage that accumulates data and provides services. One of the services is the provision of information regarding the detachment of the wheel fixing member 16 . As shown in FIG. 4, the server 51 is configured to be able to transmit information to the external device 52 . Examples of the external device 52 include a communication terminal and an electronic bulletin board provided on the road. Communication terminals include smartphones, tablet terminals, and personal computers. The electronic bulletin board is arranged at a position visible to passengers of the vehicle 11 . The server 51 provides the communication terminal with information regarding the detachment of the wheel fixing member 16 through at least one of the web browser and application.
  • the communication terminal displays the position where the wheel fixing member 16 has fallen off on the display unit, or reads out the position where the wheel fixing member 16 has fallen off, so that the user can understand that the wheel fixing member 16 has fallen off. Notifies you of your location.
  • the server 51 provides the electronic bulletin board with information on the detachment of the wheel fixing member 16 . At this time, the server 51 provides information on the detachment of the wheel fixing member 16 to electronic bulletin boards within a predetermined range from the position where the wheel fixing member 16 is detached. On the electronic bulletin board, a display for calling attention to passengers of the vehicle 11 is performed. For example, the electronic bulletin board displays a message to the effect that the wheel fixing member 16 may be detached.
  • the transmitter 21 also drops from the vehicle 11 together with the wheel fixing member 16.
  • the receiver control device 32 cannot receive radio signals.
  • the receiver control device 32 cannot acquire the ID code of the transmitter 21 . Thereby, the receiver control device 32 can detect that the wheel fixing member 16 has fallen off the vehicle 11 .
  • the wheel fixing member 16 When the wheel fixing member 16 falls off the vehicle 11, the wheel fixing member 16 does not move with the vehicle 11 and tends to remain at a fixed position on the road. Therefore, when the wheel fixing member 16 falls off, the radio signal transmitted from the transmitter 21 provided on the wheel fixing member 16 is likely to be continuously received by the same road receiver 41 . Even if the vehicle 11 passes near the road receiver 41 or the vehicle 11 temporarily stops near the road receiver 41, the radio signal from the transmitter 21 can be received for the road. machine 41 receives. However, in this case the radio signal is only temporarily received. Therefore, the road receiver control device 42 can determine that the wheel fixing member 16 has fallen off when the same ID code is repeatedly received in succession.
  • the wheel fixing member detachment detection system 20 includes a transmitter 21 and a receiver 31.
  • the transmitter 21 is provided integrally with the wheel fixing member 16 . Therefore, when the wheel fixing member 16 drops from the vehicle 11 , the transmitter 21 also drops from the vehicle 11 together with the wheel fixing member 16 . Due to the dropout of the transmitter 21 , the receiver control device 32 cannot obtain the ID code of the dropped transmitter 21 . Therefore, the receiver control device 32 can determine that the wheel fixing member 16 has fallen off when the ID code is no longer acquired.
  • the transmitter 21 has a battery 27 .
  • the transmitter 21 is capable of transmitting radio signals with the power of the battery 27 .
  • the wheel fixing member dropping detection system 20 includes a road receiver 41 .
  • the road receiver 41 determines that the wheel fixing member 16 has fallen off when the same ID code is repeatedly received.
  • the drop of the wheel fixing member 16 can be detected by the road receiver 41 .
  • the wheel fixing member dropping detection system 20 includes a server 51 .
  • the server 51 provides the external device 52 with information regarding the detachment of the wheel fixing member 16 . Thereby, the user can be notified that the wheel fixing member 16 has fallen off.
  • the receiver control device 32 detects the detachment of the wheel fixing member 16 from the ID code. Even if the transmitter 21 does not have a sensor for detecting the detachment of the wheel fixing member 16, the receiver control device 32 can detect the detachment of the wheel fixing member 16. FIG. Therefore, the manufacturing cost of the transmitter 21 can be reduced compared to the case where the transmitter 21 includes a sensor for detecting the detachment of the wheel fixing member 16 .
  • the wheel fixing member dropping detection system 20 includes a relay unit 60 .
  • One relay unit 60 is provided for each wheel 15 .
  • the relay unit 60 includes a reader 61 and a power generator 71 .
  • the reader 61 is a reader/writer used for RFID (Radio Frequency Identification) tags.
  • the reader 61 includes a reader controller 62 , a reader transmission/reception antenna 65 , a reader transmission/reception circuit 66 , a reader transmission circuit 67 , and a reader transmission antenna 68 .
  • the reader controller 62 includes a processor 63 and a storage unit 64 .
  • the processor 63 can include, for example, an MPU, CPU, and DSP.
  • the storage unit 64 includes ROM and RAM. Storage unit 64 stores program code or instructions configured to cause processor 63 to perform processing.
  • the reader controller 62 may be configured by a hardware circuit such as ASIC or FPGA.
  • the processing circuitry, receiver controller 32 may include one or more processors operating according to a computer program, one or more hardware circuits such as ASICs or FPGAs, or a combination thereof.
  • ROM and RAM or computer-readable media include any available media that can be accessed by a general purpose or special purpose computer.
  • the reading device transmitting/receiving antenna 65 transmits a radio signal to the transmitter 81 .
  • the reader transmitting/receiving antenna 65 receives the radio signal transmitted from the transmitter 81 .
  • the reader transmitting/receiving circuit 66 is capable of transmitting, from the reader transmitting/receiving antenna 65, a radio signal that has been modulated according to the data input from the reader control device 62.
  • the reader transmission/reception circuit 66 can obtain data by demodulating the radio signal received via the reader transmission/reception antenna 65 .
  • the reader transmission/reception circuit 66 outputs the data obtained by demodulating the radio signal to the reader controller 62 .
  • the reader transmission circuit 67 transmits from the reader transmission antenna 68 a radio signal that has been modulated according to the data input from the reader control device 62 .
  • a radio signal transmitted from the reader transmission circuit 67 is transmitted to the receiver 31 .
  • the power generation device 71 generates power by at least one of the rotation of the wheel 15 and the vibration of the wheel 15 .
  • the power generation device 71 for example, a device using a piezoelectric element can be used.
  • the reading device 61 operates with electric power generated by the power generation device 71 .
  • the relay unit 60 may include a power storage device that stores power generated by the power generation device 71 . In this case, surplus power not consumed by the reading device 61 out of the power generated by the power generation device 71 is stored in the power storage device. As a result, even when the power generation device 71 does not generate power, the reading device 61 can be operated with power from the power storage device. Examples of power storage devices include secondary batteries and capacitors.
  • the relay unit 60 is provided on the wheel 15, for example.
  • the relay unit 60 is provided so that the reading device 61 can receive a radio signal from a transmitter 81 provided on the same wheel 15 as the wheel 15 on which the relay unit 60 is provided.
  • the relay unit 60 is provided so that the reading device 61 cannot receive a wireless signal provided on a wheel 15 different from the wheel 15 on which the relay unit 60 is provided.
  • the relay unit 60 may be provided on the hub 13 .
  • the transmitter 81 of this embodiment is a passive RFID tag.
  • a passive RFID tag does not have a battery and operates using radio signals, which are radio waves transmitted from the reader 61, as an energy source.
  • the transmitter 81 includes a transmitter control device 82 , a transmitter transmission/reception circuit 85 , and a transmitter transmission/reception antenna 86 .
  • the transmitter transmitting/receiving circuit 85 is capable of transmitting, from the transmitter transmitting/receiving antenna 86, a radio signal that has been modulated according to the data input from the transmitter control device 82.
  • the transmitter transmission/reception circuit 85 can obtain data by demodulating the radio signal received via the transmitter transmission/reception antenna 86 .
  • the transmitter transmitting/receiving circuit 85 outputs data obtained by demodulating the radio signal to the transmitter control device 82 .
  • the hardware configuration of the transmitter control device 82 is, for example, the same as the transmitter control device 22 of the first embodiment.
  • the transmitter control device 82 includes a processor 83 and a storage section 84 .
  • the transmitter control device 82 transmits the radio signal from the transmitting/receiving circuit 85 for the transmitter.
  • This radio signal contains the ID code stored in the storage unit 84 . That is, the transmitter 81 returns the ID code in response to the request from the reader 61 .
  • the relay processing performed by the reading device 61 will be described.
  • the relay process is a process of relaying the ID code of the transmitter 81 and transmitting it to the receiver 31 .
  • the reader controller 62 transmits a radio signal from the reader transmitter/receiver circuit 66.
  • the radio signal is a signal requesting the transmitter 81 to return the ID code.
  • this radio signal is a radio wave that serves as an energy source for operating the transmitter 81 .
  • step S22 the reader controller 62 acquires an ID code from the received wireless signal.
  • the transmitter 81 transmits the radio signal including the ID code.
  • the reader controller 62 acquires the ID code obtained by demodulating the radio signal.
  • step S23 the reader control device 62 determines whether or not the same number of ID codes as the wheel fixing members 16 have been acquired.
  • the number of wheel fixing members 16 referred to here is the number of wheel fixing members 16 when the wheel fixing members 16 are not dropped. In other words, it is the maximum number of wheel fixing members 16 that fix one wheel 15 .
  • a transmitter 81 provided in each wheel fixing member 16 transmits a radio signal in response to a radio signal from the reader controller 62 . Therefore, when the wheel fixing member 16 has not fallen off the vehicle 11 , the reader control device 62 obtains the same number of ID codes as the wheel fixing members 16 . If the determination result of step S23 is affirmative, the reader control device 62 performs the process of step S25. If the determination result of step S23 is negative, the reader controller 62 performs the process of step S24.
  • step S24 the reader control device 62 determines whether or not a predetermined time has passed.
  • the predetermined time is the elapsed time from the start of the second omission detection process. When the second omission detection process ends, the elapsed time is reset.
  • the predetermined time is set to a time during which radio signals from all the transmitters 81 can be received, taking into consideration that radio signals cannot be received due to, for example, the surrounding environment. If the determination result of step S24 is negative, the reader controller 62 performs the process of step S23. When the process of step S24 is affirmative, the reader controller 62 performs the process of step S25.
  • step S25 the reader controller 62 transmits a radio signal from the reader transmitter circuit 67.
  • This radio signal is a radio signal generated according to the ID code acquired in step S23. That is, the radio signal includes the ID codes of the plurality of transmitters 81 acquired in step S23. If it is determined in step S23 that the ID codes of all the transmitters 81 provided on the same wheel 15 have been obtained, the radio transmission including the ID codes of all the transmitters 81 provided on the same wheel 15 is performed. A signal is sent. When the process of step S25 is performed by making an affirmative determination in step S24, the ID codes of all the transmitters 81 provided on the same wheel 15 have not been acquired. In this case, the reader controller 62 transmits a radio signal containing the obtained ID code.
  • the radio signal transmitted in step S25 includes information indicating the maximum number of wheel fixing members 16 provided on the same wheel 15 .
  • the radio signal transmitted in step S25 is transmitted to the receiver 31.
  • FIG. The reader controller 62 is a repeater configured to receive the radio signal from the transmitter 81 and transmit the ID code included in the radio signal to the receiver 31 .
  • the radio signal transmitted toward the receiver 31 in step S25 is a relay signal.
  • the receiver 31 Upon receiving the radio signal transmitted from the reading device 61, the receiver 31 determines whether or not the wheel fixing member 16 has fallen off by performing the first drop detection process similar to that of the first embodiment. That is, the receiver 31 determines whether or not the wheel fixing member 16 has fallen off based on whether or not the ID code has been acquired.
  • step S31 the road receiver control device 42 acquires an ID code from the relay unit 60 of the vehicle 11 traveling on the road or temporarily stopped on the road.
  • This ID code is obtained by demodulating the radio signal transmitted from the relay unit 60 in step S25, that is, the relay signal. Further, the road receiver control device 42 acquires information indicating the maximum number of wheel fixing members 16 provided on the same wheel 15 from the radio signal similarly transmitted by the relay unit 60 .
  • step S32 the road receiver control device 42 determines whether or not the number of ID codes obtained from the radio signal matches the maximum number of wheel fixing members 16 provided on the same wheel 15. judge. When the wheel fixing members 16 fall off the vehicle 11, the number of ID codes becomes smaller than the maximum number of wheel fixing members 16. ⁇ Therefore, by determining whether or not the number of ID codes matches the maximum number of wheel fixing members 16, it is possible to determine whether or not the wheel fixing member 16 has fallen off. If the number of ID codes matches the maximum number of wheel fixing members 16, the road receiver controller 42 determines that the wheel fixing members 16 have not fallen off. If the number of ID codes does not match the maximum number of wheel fixing members 16, the road receiver controller 42 determines that the wheel fixing member 16 has fallen off. If the determination result in step S32 is affirmative, the road receiver control device 42 terminates the second dropping detection process. If the determination result of step S32 is negative, the road receiver control device 42 performs the processing of step S33.
  • step S33 the road receiver control device 42 transmits information to the server 51 indicating that the wheel fixing member 16 has fallen off.
  • the processing of step S33 is the same as the processing of step S13.
  • the reading device 61 acquires the ID code of the transmitter 81 and transmits to the receiver 31 a radio signal including the acquired ID code.
  • the reader 61 can relay the ID code. Therefore, even if the receiver 31 cannot directly receive the radio signal from the transmitter 81 due to the communicable distance of the transmitter 81, the difference in the communication method between the transmitter 81 and the receiver 31, etc. , the receiver 31 can acquire the ID code.
  • the reading device 61 transmits a radio signal including the ID codes of the multiple transmitters 81 to the receiver 31 .
  • the frequency of transmission can be reduced compared to the case where a radio signal is transmitted each time an ID code is acquired.
  • the road receiver 41 determines whether or not the wheel fixing member 16 has fallen off based on the radio signal from the reading device 61 .
  • the drop of the wheel fixing member 16 can be detected by the road receiver 41 .
  • a passive RFID tag is used as the transmitter 81 . Therefore, the transmitter 81 does not have to be equipped with a battery. The weight of the transmitter 81 can be reduced as compared with the case where the transmitter 81 includes a battery. Moreover, since there is no need to consider the remaining capacity of the battery, the transmitter 81 can be used for a long period of time.
  • the reading device 61 operates with electric power from a power generation device 71 that uses the rotation and vibration of the wheel 15 to generate power. Compared to the case where the reading device 61 is operated using a battery, it is not necessary to consider the remaining capacity of the battery.
  • the road receiver 41 may include a road notification device.
  • the road notification device may be any device, such as a device that notifies by sound, a device that notifies by lighting a lamp, or a device that notifies by displaying characters or marks.
  • the road receiver control device 42 may make a notification through the road notification device. As a result, it is possible to notify the surroundings of the road receiver 41 that there is a possibility that the wheel fixing member 16 has fallen off.
  • the wheel fixing member falling-off detection system 20 may not include the server 51 .
  • the road receiver 41 preferably includes the road notification device described above.
  • the wheel fixing member dropping detection system 20 does not have to include the road receiver 41 .
  • the wheel fixing member dropping detection system 20 may include a repeater 91 .
  • the repeaters 91 are provided on the vehicle 11 one by one corresponding to the wheels 15 .
  • the repeater 91 is configured to receive a radio signal from the transmitter 21 and transmit a relay signal containing the ID code included in the radio signal to the receiver 31 .
  • the receiver 31 can acquire the ID code.
  • the repeater 91 may perform relay processing similar to that of the reading device 61 of the second embodiment.
  • the road receiver 41 can detect the detachment of the wheel fixing member 16 by performing the second detachment detection process similar to that of the second embodiment.
  • the road receiver 41 may include a road reader.
  • the road reader is a device similar to the reader 61 .
  • a road reader periodically transmits a radio signal.
  • the transmitter 81 receives this radio signal, the transmitter 81 transmits a radio signal containing the ID code.
  • the road reader determines that the wheel fixing member 16 has fallen off when the same ID code is repeatedly received, that is, when the radio signal transmitted from the same transmitter 81 is repeatedly received. do.
  • the reading device 61 may be configured to operate with the battery 27 .
  • the radio signal transmitted in step S25 may not include information indicating the maximum number of wheel fixing members 16 provided on the same wheel 15 .
  • the radio signal transmitted in step S25 may include information that allows the road receiver 41 to indirectly recognize the maximum number of wheel fixing members 16 .
  • the radio signal transmitted in step S25 may include the vehicle identification number and the ID code of the reader 61.
  • FIG. The road receiver 41 may recognize the vehicle type of the vehicle 11 from the vehicle identification number, and may recognize the maximum number of wheel fixing members 16 from the vehicle type.
  • the ID codes of the reading device 61 are grouped according to the maximum number of wheel fixing members 16 .
  • the road receiver 41 can recognize the maximum number of wheel fixing members 16 from the ID code of the reader 61 .
  • the ID codes of the transmitters 81 may be grouped according to the maximum number of wheel fixing members 16 .
  • the road receiver 41 can recognize the maximum number of wheel fixing members 16 from the obtained ID code.
  • step S24 If the result of step S24 is affirmative, in other words, if the ID code is missing, the missing ID code data is transmitted as data not used by the transmitter 81 in step S25. good too. If the acquired ID code includes an ID code that is not used by the transmitter 81, the road receiver 41 can determine that the wheel fixing member 16 has fallen off.
  • the reading device 61 may determine whether or not the wheel fixing member 16 has fallen off.
  • the ID code of the transmitter 81 is stored in the storage unit 64 of the reading device 61, and the reading device 61 performs the same processing as the first removal detection processing, thereby determining whether or not the wheel fixing member 16 has fallen off. can.
  • the reading device 61 may transmit information indicating that the wheel fixing member 16 has fallen off to the road receiver 41 .
  • reader 61 is the receiver.
  • the wheel fixing member detachment detection system 20 may or may not include the receiver 31 .
  • the reading device 61 sends information indicating that the wheel fixing member 16 has fallen off to the receiver 31 when determining that the wheel fixing member 16 has fallen off. You may send. If the wheel fixing member drop-off detection system 20 does not include the receiver 31 , the relay unit 60 may include the communication device 37 . The reader controller 62 transmits information to the server 51 indicating that the wheel fixing member 16 has fallen off.
  • the reader 61 may not be provided for each wheel 15 .
  • the wheel fixing member drop-off detection system 20 may include one reader 61 .
  • one reader 61 acquires the ID code of the transmitter 81 provided on each wheel 15 and transmits it to the receiver 31 .
  • the reader control device 62 may transmit a radio signal including the ID code to the receiver 31 every time it acquires the ID code.
  • the wheel fixing member 16 may be a wheel bolt. If the wheel fixing member 16 is a wheel bolt, the hub 13 has a bolt hole instead of the hub bolt 14 . Wheel bolts are inserted into the bolt holes. The wheel bolt is thereby fastened to the hub 13 . A wheel 15 is fixed to the axle 12 by a wheel bolt.
  • a wheel bolt has a shaft and a head.
  • the shaft is inserted into the bolt hole.
  • Transmitters 21, 81 are attached to the head.
  • the transmitters 21 and 81 are attached to the opposite surface of the axial end surface of the head, to the surface on which the shaft portion is provided.
  • the transmitters 21 and 81 may be attached to the wheel bolts with an adhesive, or may be attached to the wheel bolts by being fitted into the wheel bolts.
  • the transmitters 21 and 81 may be provided integrally with the wheel fixing member 16 and may be attached to a nut cap attached to the wheel fixing member 16 . That is, the transmitters 21 and 81 may drop out of the vehicle 11 together with the wheel fixing member 16 when the wheel fixing member 16 drops out of the vehicle 11 .

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)

Abstract

L'invention concerne un système de détection de chute d'élément de fixation de roue (20), ledit système comprenant un émetteur (21) doté d'un élément de fixation de roue (16) pour fixer une roue (15) à un essieu (12), et un récepteur (31) installé dans un véhicule (11). L'émetteur (21) est pourvu d'une unité de stockage d'émetteur (24) conçue de façon à stocker des informations d'identification, et d'un circuit de transmission (25) conçu de façon à émettre un signal sans fil comprenant les informations d'identification. Le récepteur (31) est pourvu d'un dispositif de commande de récepteur (32) qui acquiert les informations d'identification incluses dans le signal sans fil. Le dispositif de commande de récepteur (32) est conçu de façon à déterminer que l'élément de fixation de roue (16) a chuté lorsqu'il n'acquiert plus les informations d'identification.
PCT/JP2021/028405 2021-07-30 2021-07-30 Système de détection de chute d'élément de fixation de roue WO2023007715A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/JP2021/028405 WO2023007715A1 (fr) 2021-07-30 2021-07-30 Système de détection de chute d'élément de fixation de roue

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2021/028405 WO2023007715A1 (fr) 2021-07-30 2021-07-30 Système de détection de chute d'élément de fixation de roue

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WO2023007715A1 true WO2023007715A1 (fr) 2023-02-02

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06247114A (ja) * 1993-02-22 1994-09-06 Tokai Rika Co Ltd 遠隔操作装置を備えた自動車のタイヤ異常警報装置
JP2003300452A (ja) * 2002-04-08 2003-10-21 Tokai Rika Co Ltd 車両用タイヤ監視装置
JP2005199803A (ja) * 2004-01-14 2005-07-28 Calsonic Kansei Corp 自動車のタイヤ盗難防止システム
JP2005329907A (ja) * 2004-05-21 2005-12-02 Denso Corp 車輪脱落検出装置
JP2008074163A (ja) * 2006-09-19 2008-04-03 Denso Corp タイヤ空気圧検出装置
JP2010156616A (ja) * 2008-12-26 2010-07-15 Mitsubishi Fuso Truck & Bus Corp 車両のタイヤ外れ状態検出装置
JP2013523519A (ja) * 2010-03-30 2013-06-17 ウィーリー−セーフ リミテッド ホイールロス検知装置
JP2019182330A (ja) * 2018-04-16 2019-10-24 株式会社ブリヂストン タイヤ状態遠隔監視システム、タイヤ状態遠隔監視プログラム及びタイヤ状態遠隔監視方法

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06247114A (ja) * 1993-02-22 1994-09-06 Tokai Rika Co Ltd 遠隔操作装置を備えた自動車のタイヤ異常警報装置
JP2003300452A (ja) * 2002-04-08 2003-10-21 Tokai Rika Co Ltd 車両用タイヤ監視装置
JP2005199803A (ja) * 2004-01-14 2005-07-28 Calsonic Kansei Corp 自動車のタイヤ盗難防止システム
JP2005329907A (ja) * 2004-05-21 2005-12-02 Denso Corp 車輪脱落検出装置
JP2008074163A (ja) * 2006-09-19 2008-04-03 Denso Corp タイヤ空気圧検出装置
JP2010156616A (ja) * 2008-12-26 2010-07-15 Mitsubishi Fuso Truck & Bus Corp 車両のタイヤ外れ状態検出装置
JP2013523519A (ja) * 2010-03-30 2013-06-17 ウィーリー−セーフ リミテッド ホイールロス検知装置
JP2019182330A (ja) * 2018-04-16 2019-10-24 株式会社ブリヂストン タイヤ状態遠隔監視システム、タイヤ状態遠隔監視プログラム及びタイヤ状態遠隔監視方法

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