CN110549799B - Tire pressure monitoring control method and system - Google Patents
Tire pressure monitoring control method and system Download PDFInfo
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- CN110549799B CN110549799B CN201910857864.8A CN201910857864A CN110549799B CN 110549799 B CN110549799 B CN 110549799B CN 201910857864 A CN201910857864 A CN 201910857864A CN 110549799 B CN110549799 B CN 110549799B
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- 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
- B60C23/0408—Signalling devices actuated by tyre pressure mounted on the wheel or tyre transmitting the signals by non-mechanical means from the wheel or tyre to a vehicle body mounted receiver
- B60C23/0415—Automatically identifying wheel mounted units, e.g. after replacement or exchange of wheels
- B60C23/0416—Automatically identifying wheel mounted units, e.g. after replacement or exchange of wheels allocating a corresponding wheel position on vehicle, e.g. front/left or rear/right
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- 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
- B60C23/0408—Signalling devices actuated by tyre pressure mounted on the wheel or tyre transmitting the signals by non-mechanical means from the wheel or tyre to a vehicle body mounted receiver
- B60C23/0422—Signalling devices actuated by tyre pressure mounted on the wheel or tyre transmitting the signals by non-mechanical means from the wheel or tyre to a vehicle body mounted receiver characterised by the type of signal transmission means
- B60C23/0433—Radio signals
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- 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
- B60C23/0408—Signalling devices actuated by tyre pressure mounted on the wheel or tyre transmitting the signals by non-mechanical means from the wheel or tyre to a vehicle body mounted receiver
- B60C23/0471—System initialisation, e.g. upload or calibration of operating parameters
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- Mechanical Engineering (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
Abstract
The invention belongs to the technical field of tire pressure monitoring devices, and discloses a tire pressure monitoring control method, which relates to a tire pressure monitoring device and a tire pressure repeater, wherein the tire pressure monitoring device comprises a first tire pressure sensor and a tire pressure display, the tire pressure repeater is in communication connection with the first tire pressure sensor through radio frequency signals, and the tire pressure display is in communication connection with the tire pressure repeater through a power line carrier. The repeater communicates with at least part of the tire pressure sensors through radio frequency signals and communicates with the tire pressure display through a power line carrier communication mode, the problems that signals are interfered in a wireless communication mode and the repeater needs to be paired again in the traditional technology are solved, and meanwhile, the invention also discloses a system for realizing the method.
Description
Technical Field
The invention relates to the technical field of tire pressure monitoring devices, in particular to a tire pressure monitoring control method and a tire pressure monitoring control system.
Background
The tire pressure monitoring is also called TPMS, and is used for monitoring the air pressure and temperature of an automobile tire in real time, displaying the values of the tire pressure and temperature, enabling a vehicle owner to master the conditions of the tire pressure and temperature at any time, finding out the conditions of tire air leakage, insufficient air pressure, overhigh air pressure and the like in time and avoiding traffic accidents caused by tire burst. The existing TPMS sensors automatically monitor the air pressure and temperature of tires in real time when an automobile is static or in the running process, and give an alarm in time for the high pressure, the low pressure and the high temperature of the tires, so that traffic accidents caused by tire faults are avoided, and the driving safety is ensured.
At present, in a tire pressure monitor of an existing trailer truck, a repeater and a tire pressure sensor on a trailer and a trailer (or a trailer, hereinafter, all represented by the trailer) all adopt a same-frequency or different-frequency wireless communication mode, so that after the repeater on the trailer and the trailer is replaced, the repeater on the trailer needs to be paired again or confirmed again, the repeater signal on the trailer can be identified, if a replacement driver does not know the use method of the tire pressure or forgets the pairing confirmation operation in a certain use, the tire pressure of the trailer is not in a monitoring state during driving, inconvenience is brought to the driver, and potential safety hazards exist. In addition, the repeater and the tire pressure sensor in the conventional tire pressure monitor adopt a wireless communication mode, so that interference is formed between vehicles, and the receiving of the display is unfavorable.
Disclosure of Invention
The invention aims to provide a tire pressure monitoring control method and a system, wherein a repeater communicates with at least part of tire pressure sensors through radio frequency signals and communicates with a tire pressure display through a power line carrier communication mode, the problems that signals are interfered and the repeater needs to be paired again in a wireless communication mode in the prior art are solved, and meanwhile, the invention also discloses a system for realizing the method.
A tire pressure monitoring control method relates to a tire pressure monitoring device and a tire pressure repeater, wherein the tire pressure monitoring device comprises a first tire pressure sensor and a tire pressure display, the tire pressure repeater is in communication connection with the first tire pressure sensor through radio frequency signals, and the tire pressure display is in communication connection with the tire pressure repeater through a power line carrier.
In the above tire pressure monitoring control method, the method includes a pairing step including the substeps of:
substep 11: the tire pressure repeater sends the ID of the tire pressure repeater to the tire pressure display through a power carrier; the tire pressure display sends the ID of the tire pressure repeater and the position information of the first tire pressure sensor to the corresponding first tire pressure sensor;
it should be noted that: in the pairing process, the manual operation specifically comprises the following steps: the driver or the operator takes the tire pressure display to the position of the corresponding tire of the trailer, and then sets the position information of the first tire pressure sensor corresponding to the tire manually, and the tire pressure display is closest to the position of the first tire pressure sensor corresponding to the tire, so that mismatching can not occur.
In the sub-step 11, the operation "the tire air pressure relay transmits its own ID to the tire air pressure display through the power supply carrier" is based on the case where the tire air pressure display is connected to the power supply line at the vehicle head.
Substep 12: the first tire pressure sensor sends the position information of the first tire pressure sensor, the ID of the tire pressure repeater and the electronic tag of the first tire pressure sensor to the tire pressure repeater through radio frequency signals;
substep 13: establishing radio frequency communication pairing between the tire pressure repeater and the first tire pressure sensor;
substep 14: the tire pressure repeater sends the electronic tag and the position information of the first tire pressure sensor to the tire pressure display through radio frequency signals, and the tire pressure display completes pairing of the first tire pressure sensor.
The reason why the tire pressure relay communicates with the tire pressure display using radio frequency signals in sub-step 14 is that the tire pressure display has been brought into the vicinity of the tire to communicate with the first tire pressure sensor in sub-step 11, and at this time, the tire pressure display is no longer connected to the power line and therefore communicates by radio frequency signals. During the operation of the vehicle, communication is still performed in the form of a power carrier signal.
In the above tire pressure monitoring control method, the method includes a tire pressure data transmission step, which includes the substeps of:
substep 21: the first tire pressure sensor collects tire pressure data of a corresponding tire and sends the tire pressure data to the tire pressure repeater through a radio frequency signal;
substep 22: the tire pressure repeater transmits the received tire pressure data to the tire pressure display in a power line carrier mode;
substep 23: the tire pressure display displays the tire pressure data.
In the above tire pressure monitoring control method, the first tire pressure sensor is provided with an LF receiving and UHF transmitting circuit, the tire pressure display is provided with an LF transmitting and UHF receiving circuit and a carrier receiving circuit, and the tire pressure relay is provided with a carrier transmitting circuit, an LF transmitting and UHF receiving circuit.
In the tire pressure monitoring control method, in the substep 11, the tire pressure display and the first tire pressure sensor communicate with each other through LF radio frequency signals;
in sub-steps 12 and 13, radio frequency communication is performed between the first tire pressure sensor and the tire pressure relay by using radio frequency signals.
In the above-described tire pressure monitoring control method, the first tire pressure sensor is provided on a tire of the trailer.
In the tire pressure monitoring control method, the tire pressure monitoring device further comprises a second tire pressure sensor arranged on the vehicle head, the second tire pressure sensor is also provided with an independent LF receiving and UHF transmitting circuit, and the second tire pressure sensor and the tire pressure display are directly in communication connection through radio frequency signals.
In the above tire pressure monitoring control method, the pairing step of the tire pressure relay and the tire pressure display is further included:
when the tire pressure display and the tire pressure repeater are connected through the power line, the tire pressure display can receive the power line carrier signal, the tire pressure display can display the prompt of receiving the power line carrier signal, and after the user confirms, the tire pressure display and the tire pressure repeater establish communication connection based on the power line carrier.
In practical application, the tire pressure repeater and the tire pressure display can be paired by using radio frequency signals, and the tire pressure repeater is provided with a UHF transmitting circuit and a UHF receiving circuit, and the tire pressure display is provided with an LF transmitting circuit and a UHF receiving circuit, so that the tire pressure repeater sends a pairing request to the tire pressure display through the UHF radio frequency signals in the process of seeking pairing, and the UHF receiving circuit of the tire pressure display is paired with the tire pressure display.
In addition, the invention also provides a tire pressure monitoring system for realizing the method, which comprises a tire pressure monitoring device and a tire pressure relay, wherein the tire pressure monitoring device comprises a first tire pressure sensor and a tire pressure display;
the tire pressure relay includes:
the UHF transmitting and receiving circuit is used for receiving a radio frequency signal sent by a first tire pressure sensor in the tire pressure monitoring device and sending the radio frequency signal to the main control module;
the main control module is electrically connected with the UHF transmitting and receiving circuit and is used for processing the radio frequency signals in the UHF receiving and transmitting circuit and sending the processed signals to the power line carrier transmitting circuit;
the power line carrier transmitting circuit is electrically connected with the main control module and is used for transmitting the signals processed by the main control module to a tire pressure display in the tire pressure monitoring device;
and the power supply module is electrically connected with the UHF transmitting and receiving circuit, the main control module and the power line carrier transmitting circuit and is used for supplying power to the UHF transmitting and receiving circuit, the main control module and the power line carrier transmitting circuit.
In the tire pressure monitoring system, the first tire pressure sensor is provided with an LF receiving circuit and an UHF transmitting circuit, and the tire pressure display is provided with an LF transmitting circuit and an UHF receiving circuit.
In the tire pressure monitoring system, the tire pressure monitoring device further comprises a second tire pressure sensor, and the second tire pressure sensor is arranged on a tire of the vehicle head; the first tire pressure is arranged on a tire of the trailer;
the second tire pressure sensor is also independently provided with an LF receiving circuit and an UHF transmitting circuit; and the second tire pressure sensor is in communication connection with the tire pressure display through radio frequency signals.
Compared with the prior art, the invention has the beneficial effects that:
according to the invention, different communication modes between the repeater, the tire pressure sensor and the tire pressure display are adjusted, so that the tire pressure repeater and the tire pressure monitoring device are communicated in a power supply carrier mode, the repeater between the trailer and the trailer can be successfully paired without carrying out pairing confirmation again or simply operating on the tire pressure display after being exchanged at will, and the tire pressure monitoring device can work, so that convenience is brought to users; meanwhile, the power line carrier mode is adopted for communication, so that data communication between vehicles cannot generate interference, and data transmission between the repeater and the tire pressure display is more reliable.
Drawings
FIG. 1 is a flowchart of the pairing procedure in embodiment 1 of the present invention.
Fig. 2 is a flowchart of tire pressure data transmission steps of embodiment 1 of the present invention;
FIG. 3 is a block diagram showing the structures of examples 1 and 2 of the present invention;
fig. 4 is a block diagram of a circuit configuration of the tire air pressure relay according to embodiment 2 of the present invention.
Fig. 5 is a specific circuit configuration diagram of the overcurrent/overvoltage protection circuit according to embodiment 2 of the present invention.
Fig. 6 is a specific circuit configuration diagram of a voltage regulator circuit according to embodiment 2 of the present invention.
Fig. 7 is a specific circuit configuration diagram of the UHF transmission and reception circuit according to embodiment 2 of the present invention.
Fig. 8 is a specific circuit configuration diagram of the main control module according to embodiment 2 of the present invention.
Fig. 9 is a circuit block diagram of the power line carrier transmitting circuit according to embodiment 2 of the present invention.
Fig. 10 is a specific circuit configuration diagram of the power line carrier transmitting circuit according to embodiment 2 of the present invention.
Detailed Description
The technical solution of the present invention will be described in further detail with reference to the following embodiments, but the present invention is not limited thereto.
Example 1
As shown in fig. 3, a tire pressure monitoring control method relates to a tire pressure monitoring device and a tire pressure relay 1, the tire pressure monitoring device comprises a first tire pressure sensor 2 and a tire pressure display 3, the tire pressure relay 1 and the first tire pressure sensor 2 are connected through radio frequency signal communication, and the tire pressure display 3 and the tire pressure relay 1 are connected through power line carrier communication.
Because the first tire pressure sensor 2 and the tire pressure relay 1 communicate with each other through radio frequency signals, and the tire pressure display 3 and the tire pressure relay 1 are in communication connection in a power line carrier mode, signals cannot interfere with each other, and the signal stability is good.
Meanwhile, the tire pressure relay 1 is installed on the trailer, and if the tire pressure relay 1 is replaced, since the tire pressure relay 1 and the tire pressure display 3 communicate with each other in a power line carrier manner, the pairing is not required to be performed again, and the pairing difficulty is reduced.
With reference to fig. 1, further elaboration and preferably, the method comprises a pairing step comprising the sub-steps of:
substep 11: the tire pressure display 3 transmits the ID of the tire pressure relay 1 and the location information of the first tire pressure sensor 2 to the corresponding first tire pressure sensor 2;
the tire pressure display 3 and the first tire pressure sensor 2 may communicate with each other in any manner, such as radio frequency signals, power line carrier signals, etc., in this embodiment, radio frequency signals are preferably communicated, and more preferably, the first tire pressure sensor 2 communicates with the corresponding tire pressure display in an LF transmission and UHF reception manner, that is, the tire pressure display 3 transmits LF radio frequency signals, and the first tire pressure sensor 2 receives LF radio frequency signals.
For example, the first tire pressure sensor 2 of the left rear tire, the tire pressure relay 1 is paired with the tire pressure display 3 in advance, and the tire pressure display 3 sends out the LF signal, which includes: the repeater ID and the position information of the first tire pressure sensor 2 are sent to the first tire pressure sensor 2, the first tire pressure sensor 2 forwards the position information of the first tire pressure sensor 2 and the repeater ID to the tire pressure repeater 1, and simultaneously, the electronic tag number of the first tire pressure sensor 2 is also sent to the tire pressure repeater 1, when the tire pressure repeater 1 receives the repeater ID signal same as the tire pressure repeater 1, the received electronic tag number of the first tire pressure sensor 2 is recorded at the corresponding position, for example, the position information contained in the radio frequency signal sent by the tire pressure display 3 is 6A wheels, so that the repeater 1 records the electronic tag number of the first tire pressure sensor 2 at the position.
Substep 12: the first tire pressure sensor 2 transmits the position information of the first tire pressure sensor 2, the ID of the tire pressure relay 1 and the electronic tag of the first tire pressure sensor 2 to the tire pressure relay 1 through radio frequency signals;
for example, the first tire pressure sensor 2 of the left rear tire transmits a radio frequency signal to the repeater, the radio frequency signal includes information such as an electronic tag of the first tire pressure sensor 2, a repeater ID, and the left rear tire, and the electronic tag not only includes the ID number of the first tire pressure sensor 2, but also includes any other information of the first tire pressure sensor, such as a model, an operating parameter, and the like, and can be freely configured as required.
Substep 13: a pairing of radio frequency communication is established between the tire pressure relay 1 and the first tire pressure sensor 2. The pairing for establishing radio frequency communication is based on two data, one is an electronic tag number, so that in the subsequent communication process, the tire pressure relay 1 can accurately judge which signal is sent by the first tire pressure sensor 2, and the other is a relay ID, and the relay ID is used for allowing the tire pressure relay 1 to allow the first tire pressure sensor 2 and the tire pressure relay 1 to be paired. When the pairing is established, the tire pressure repeater 1 can know whether the first tire pressure sensor 2 is the left rear wheel or the right rear wheel according to the electronic tag number.
Through the step, no matter whether the repeater is replaced or not, the repeater does not need to carry out complex tire pairing, and the use difficulty of a user is reduced.
As a preference of this embodiment, the method further includes the substep 14: after the substep 13 is finished, the pairing of the system is confirmed between the tire pressure relay 1 and the tire pressure display 3, specifically, after the substep 13, the pairing between the tire pressure relay 1 and the first tire pressure sensor 2 is already established, and the electronic tag and the position information of the corresponding first tire pressure sensor 2 are stored in the tire pressure relay 1. The tire pressure repeater 1 and the tire pressure display 3 communicate with each other through radio frequency signals, specifically, through UHF radio frequency signals, the received electronic tag and the position information of the first tire pressure sensor 2 are sent to the tire pressure display 3, the tire pressure display 3 matches the received electronic tag and the position information of the first tire pressure sensor 2 with the position information which is sent to the first tire pressure sensor 2 in the substep 11 in advance, and after the step is completed, normal communication transmission can be performed, that is, the first tire pressure sensor 2 sends the tire pressure data and the position information to the tire pressure repeater 1 through UHF radio frequency signals, the tire pressure repeater 1 sends the tire pressure data and the position information to the tire pressure display 3 through power line carrier signals, and the tire pressure display 3 displays the tire pressure data at the corresponding position of the display interface according to the position information.
As a further refinement of the above method, referring to fig. 2, the method includes a tire pressure data transmission step, which is based on the completion of the above pairing step, and the tire pressure data transmission step includes the following substeps:
substep 21: the first tire pressure sensor 2 collects tire pressure data of a corresponding tire and sends the tire pressure data to the tire pressure repeater 1 through a radio frequency signal; it should be noted that the LF (low frequency) radio frequency signal refers to a radio frequency signal of about 125KHz, the HF (high frequency) or UHF (ultra high frequency) radio frequency signal refers to a radio frequency signal in the range of 300-3000MHz, and the embodiment specifically adopts the 433MHz frequency band, and in this step, the UHF radio frequency signal is adopted to transmit data to the tire pressure relay 1.
Substep 22: the tire pressure repeater 1 transmits the received tire pressure data to the tire pressure display 3 in the form of power line carrier waves; the signal transmission mode of the power line carrier is to transmit a modulated signal through a power line, so that the interference resistance to external wireless signals is strong, and the interference to the wireless signals is small, so that the stability of the repeater in the data forwarding process is very high. The frequency of the power line carrier signal is not limited in this embodiment, and theoretically, any frequency may be used.
Substep 23: the tire pressure display 3 displays the tire pressure data.
In the above scheme, the first tire pressure sensor 2 is provided with an LF receiving and UHF transmitting circuit, the tire pressure display 3 is provided with an LF transmitting and UHF receiving circuit, and the tire pressure relay 1 is provided with an UHF transmitting and receiving circuit. It is understood that, in order to implement the power supply carrier communication, the tire pressure display 3 must be provided with a carrier receiving circuit, and the tire pressure relay must be provided with a carrier transmitting circuit.
As a further refinement of the above scheme, the tire pressure monitoring device further includes a second tire pressure sensor 4, the second tire pressure sensor 4 is also provided with an independent LF receiving and UHF transmitting circuit, and the second tire pressure sensor 4 and the tire pressure display 3 are directly in communication connection through a radio frequency signal.
As a further refinement of the above scheme, the method further comprises the step of pairing the tire pressure relay 1 and the tire pressure display 3:
when the tire pressure display 3 and the tire pressure relay 1 are connected through the power line, the tire pressure display 3 receives the power line carrier signal, the tire pressure display 3 displays the prompt of receiving the power line carrier signal, and after the user confirms, the tire pressure display 3 and the tire pressure relay 1 establish communication connection based on the power line carrier.
This step is typically performed when the installation equipment or the headstock and trailer are connected.
In the present embodiment, the user confirmation operation is mostly performed by a confirmation button provided on the tire pressure display 3, or a virtual confirmation button on the display interface of the tire pressure display 3.
The present embodiment proposes that the practical significance of the pairing step is:
in many cases, the power carrier signal is not confined to travel within the power lines and may diffract into the air space environment, traveling over a limited distance.
The embodiment is mainly used for the condition that the head and the trailer are separable, and when the head and the trailer are separated, the head can easily receive other power supply carrier signals in a place with dense trailers such as a cargo unloading yard even though the head is not electrically connected with other trailers.
Therefore, in this embodiment, an acknowledgement button is required to be added, so that the tire pressure display is not easily connected to other tire pressure repeaters, thereby avoiding false alarm or other problems.
Once the vehicle head and the trailer are electrically connected, the influence of the power carrier signals of other trailers on the vehicle head can be ignored, because the signal transmitted by the power line is the strongest, and the preset design of the tire pressure display provides that only the signal with the strongest power carrier signal is displayed.
Therefore, it is further preferable that a judgment method is preset in the tire pressure display, that is, when the tire pressure display detects that there are a plurality of power line carrier signals, the power line carrier signal with the strongest signal is displayed by default.
According to the invention, different communication modes between the repeater, the tire pressure sensor and the tire pressure display 3 are adjusted, so that the tire pressure repeater 1 and the tire pressure monitoring device are communicated in a power supply carrier mode, the repeater between the trailer and the trailer can be randomly exchanged without re-pairing confirmation, and the tire pressure monitoring device can work, so that convenience is brought to users; meanwhile, the power line carrier mode is adopted for communication, so that data communication between vehicles cannot generate interference, and data transmission between the repeater and the tire pressure display 3 is more reliable.
Example 2
As shown in fig. 3 to 10, a tire pressure monitoring system for implementing the method as described above, the system comprising a tire pressure monitoring device including a first tire pressure sensor 2 and a tire pressure display 3, and a tire pressure relay 1;
the tire pressure relay 1 includes:
the UHF transmitting and receiving circuit 11 is configured to receive a radio frequency signal from the first tire pressure sensor 2 in the tire pressure monitoring device, demodulate the radio frequency signal, and send the demodulated radio frequency signal to the main control module 12;
the main control module 12 is electrically connected with the UHF transmitting and receiving circuit 11, and the main control module 12 is configured to process the radio frequency signal in the UHF transmitting and receiving circuit 11 and send the processed signal to the power line carrier transmitting circuit 13;
a power line carrier transmitting circuit 13 electrically connected to the main control module 12, and configured to send a signal processed by the main control module 12 to the tire pressure display 3 in the tire pressure monitoring device;
and the power supply module 14 is electrically connected with the UHF transmitting and receiving circuit 11, the main control module 12 and the power line carrier transmitting circuit 13 and is used for supplying power to the UHF transmitting and receiving circuit 11, the main control module 12 and the power line carrier transmitting circuit 13.
Specifically, the first tire pressure sensor 2 is provided with an LF receiving and UHF transmitting circuit; the tire pressure display 3 is independently provided with an LF transmitting circuit and an UHF receiving circuit, the tire pressure monitoring device also comprises a second tire pressure sensor 4, and the second tire pressure sensor 4 is arranged on a tire of a vehicle head; the first tire pressure sensor is arranged on a tire of the trailer;
the second tire pressure sensor 4 is also independently provided with an LF receiving circuit and an UHF transmitting circuit; the second tire pressure sensor 4 and the tire pressure display 3 are in communication connection through radio frequency signals.
The working principle is as follows:
and (3) pairing: the tire pressure monitoring device and the tire pressure repeater 1 are both powered on, the tire pressure display 3 communicates with the first tire pressure sensor 2 through an LF radio frequency signal, the LF radio frequency signal comprises an electronic tag number of the first tire pressure sensor 2, an ID of the tire pressure repeater 1 and position information of pairing of the first tire pressure sensor 2, the first tire pressure sensor 2 knows the position thereof by receiving the LF radio frequency signal, the first tire pressure sensor 2 then compares the electronic tag number of the first tire pressure sensor 2, the ID of the tire pressure relay 1, the location information of the first tire pressure sensor 2 pair, the UHF radio frequency signal is transmitted to the UHF transmitting and receiving circuit 11 of the tire pressure relay 1 for communication, and after the tire pressure relay 1 confirms its ID number through the main control module 12, and storing the electronic tag number of the first tire pressure sensor 2 to a pairing position, and establishing pairing with the first tire pressure sensor 2. Then, when the first tire pressure sensor 2 sends data each time, the main control module processes the data sent by the first tire pressure sensor 2 and the position information stored in the sensor 2 and sends the data and the position information to the power line carrier transmitting circuit 13, so that the power line carrier transmitting circuit 13 of the tire pressure relay 1 can send the data to the tire pressure display 3 in a power line carrier mode, and the tire pressure display 3 displays the tire pressure information to the corresponding position of the display interface according to the position of the first tire pressure sensor 2 recorded in the information. In the present embodiment, the second tire air pressure sensor 4 and the tire air pressure display 3 are directly connected to establish a communication connection based on a radio frequency signal.
As a further refinement of this embodiment, the power supply module 14 includes a voltage stabilizing circuit and a power supply overvoltage and overcurrent protection circuit electrically connected to each other, and the voltage stabilizing circuit is electrically connected to the main control module 12, the power supply line carrier transmitting circuit 13, and the UHF transmitting and receiving circuit 11 of the tire pressure repeater 1; the power supply overvoltage and overcurrent protection circuit is electrically connected with the power line carrier transmitting circuit 13. In this embodiment, a specific circuit of the power supply overvoltage and overcurrent protection circuit is shown in fig. 5, and a specific circuit of the voltage regulator circuit is shown in fig. 6. In the power supply overvoltage and overcurrent protection circuit, a connection port DC + and a connection port GND are used for an external power supply, and nodes marked with A1 in figures 5 and 6 are connected with each other. The power supply overvoltage and overcurrent protection circuit is used for an external power supply and limits current and voltage so as to protect the normal work of electronic components, and the voltage stabilizing circuit is used for stabilizing the voltage of the external power supply and then supplying power to each circuit. In other embodiments, the power supply module 14 may adopt a functional module existing in the prior art, and will not be described in detail herein.
In one preferred embodiment, the specific circuit of the UHF transmitting and receiving circuit 11 is shown in fig. 7, and the main control chip is ATA 5833. In the present embodiment, the UHF transmitting and receiving circuit 11 is a functional circuit existing in the prior art, and a detailed description thereof will be omitted. In other embodiments, the UHF transmission and reception circuitry 11 may also employ functional circuitry as is known in the art.
In one preferred embodiment, the host module 12 includes a microcontroller circuit and a memory circuit electrically connected to each other. In this embodiment, a specific circuit of the main control module 12 is shown in fig. 8, wherein a model of a main control chip in the microcontroller circuit is MKE02Z32VLC 4; the model of the main control chip in the memory circuit is HM24C 08T. In other embodiments, the power supply module 14 may adopt a functional module existing in the prior art, and will not be described in detail herein.
In one preferred embodiment, the circuit structure of the power line carrier transmitting circuit 13 is as shown in fig. 9, and the power line carrier transmitting circuit 13 includes a data modulation circuit, a carrier oscillation circuit, a carrier amplification circuit, and an output matching circuit, which are electrically connected in sequence, and the power line carrier transmitting circuit 13 further includes a carrier transmission control circuit, which is electrically connected to both the carrier oscillation circuit and the carrier amplification circuit; the signal input end of the data modulation circuit is electrically connected with the main control module 12, and the output end of the output matching circuit is electrically connected with a connecting end of the power supply overvoltage and overcurrent protection circuit, which is connected with a power line.
In a specific embodiment, a specific circuit structure of the power line carrier transmitting circuit 13 is shown in fig. 10, in which:
the data modulation circuit is composed of C32, R17, R18, R19, R20, and D7 (varactor diodes), and is used for modulating a carrier signal; the main control chip model U1(MKE02Z32VLC4) in the main control module 12 converts the tire pressure sensor signal received by the UHF transmitting and receiving circuit 11 into a data signal in a communication format with a display, and outputs the data signal to the data modulation circuit from the 15 pin of U1 to modulate a carrier signal; when the data signal changes, the voltage across D7 in the data modulation circuit changes, the voltage at D7 changes, the capacitance value of D7 changes, the frequency of the carrier oscillation circuit that oscillates with D7 changes, and the carrier signal is modulated.
The carrier oscillation circuit consists of Q7, R14, R15, R16, C31, C30, L17 and X2, generates a carrier frequency signal determined by the frequency point of X2, performs frequency selection through a frequency selection circuit consisting of L16 and C29, and then outputs the carrier frequency signal to the carrier amplification circuit for amplification;
the carrier amplifying circuit consists of L15, C28, L14, C27, Q6, R11, R12, R13, C37, C26, L13 and Q6, wherein, after the carrier signal output by the carrier oscillating circuit is frequency-selected by L15, C28, L14 and C27 and is impedance-matched with the carrier amplifying circuit, the carrier signal is input to the amplifying circuit consisting of Q6, R11, R12, R13, C37, C26 and L13 for amplification, and the carrier signal is output by the C pole of Q6 after being amplified;
the output matching circuit consists of C25, C24, C23, L12 and L10, is used for being coupled to the power line for data transmission after being matched with the power line, and the display receives a carrier signal on the power line and demodulates the data signal from the carrier signal;
the carrier emission control circuit consists of Q8, R21 and R22 and controls the work of the carrier oscillation circuit and the carrier amplification circuit; in addition, L18 and L11 are used to isolate the carrier circuit from the power supply of the repeater.
Through the structure, the tire pressure repeater 1 and the tire pressure display 3 of the tire pressure monitoring device are communicated in a power supply carrier mode, so that the repeater between the trailer and the trailer can be exchanged at will without re-pairing confirmation or simple operation, and the tire pressure monitoring device can work, thereby bringing convenience to users; meanwhile, the power line carrier mode is adopted for communication, so that data communication between vehicles cannot generate interference, and data transmission between the repeater and the tire pressure display 3 is more reliable.
The above description is only exemplary of the invention, and any modification, equivalent replacement, and improvement made within the spirit and scope of the present invention should be considered within the scope of the present invention.
Claims (9)
1. A tire pressure monitoring control method relates to a tire pressure monitoring device and a tire pressure repeater, wherein the tire pressure monitoring device comprises a first tire pressure sensor and a tire pressure display, and is characterized in that the tire pressure repeater is in communication connection with the first tire pressure sensor through radio frequency signals;
the method comprises a pairing step comprising the sub-steps of:
substep 11: the tire pressure repeater transmits the ID of the tire pressure repeater to the tire pressure display through a power line carrier; the tire pressure display sends the ID of the tire pressure repeater and the position information of the first tire pressure sensor to the corresponding first tire pressure sensor;
substep 12: the first tire pressure sensor sends the position information of the first tire pressure sensor, the ID of the tire pressure repeater and the electronic tag of the first tire pressure sensor to the tire pressure repeater through radio frequency signals;
substep 13: a pairing of radio frequency communication is established between the tire pressure relay and the first tire pressure sensor.
2. The tire air pressure monitoring control method according to claim 1, wherein the method includes a tire air pressure data transmission step including the substeps of:
substep 21: the first tire pressure sensor collects tire pressure data of a corresponding tire and sends the tire pressure data to the tire pressure repeater through a radio frequency signal;
substep 22: the tire pressure repeater transmits the received tire pressure data to the tire pressure display in a power line carrier mode;
substep 23: the tire pressure display displays the tire pressure data.
3. The tire pressure monitoring control method according to claim 1, wherein the first tire pressure sensor is provided with an LF receiving and UHF transmitting circuit, the tire pressure display is provided with an LF transmitting and UHF receiving circuit, a carrier receiving circuit, and the tire pressure relay is provided with a carrier transmitting circuit, a UHF transmitting and UHF receiving circuit.
4. The tire pressure monitoring control method according to claim 1, wherein in sub-step 11, communication between the tire pressure display and the first tire pressure sensor is performed by radio frequency signals;
in sub-steps 12 and 13, radio frequency communication is performed between the first tire pressure sensor and the tire pressure relay by using radio frequency signals.
5. The tire pressure monitoring control method according to any one of claims 1 to 4, wherein the tire pressure monitoring device further comprises a second tire pressure sensor arranged on the vehicle head, the second tire pressure sensor is also provided with an independent LF receiving and UHF transmitting circuit, and the second tire pressure sensor and the tire pressure display are directly in communication connection through radio frequency signals.
6. The tire air pressure monitoring control method according to any one of claims 1 to 4, further comprising a pairing step of the tire air pressure relay and the tire air pressure display:
when the tire pressure display and the tire pressure repeater are connected through the power line, the tire pressure display can receive the power line carrier signal, the tire pressure display can display the prompt of receiving the power line carrier signal, and after the user confirms, the tire pressure display and the tire pressure repeater establish communication connection based on the power line carrier.
7. A tire pressure monitoring system for implementing the method of any of claims 1-6, the system comprising a tire pressure monitoring device and a tire pressure relay, the tire pressure monitoring device comprising a first tire pressure sensor and a tire pressure display;
the tire pressure relay includes:
the UHF transmitting and receiving circuit is used for receiving a radio frequency signal sent by a first tire pressure sensor in the tire pressure monitoring device, demodulating the radio frequency signal and sending the demodulated radio frequency signal to the main control module;
the main control module is electrically connected with the UHF transmitting and receiving circuit and is used for processing the signals demodulated by the UHF receiving and transmitting circuit and sending the processed signals to the power line carrier transmitting circuit;
the power line carrier transmitting circuit is electrically connected with the main control module and is used for transmitting the signals processed by the main control module to a tire pressure display in the tire pressure monitoring device;
and the power supply module is electrically connected with the UHF transmitting and receiving circuit, the main control module and the power line carrier transmitting circuit and is used for supplying power to the UHF transmitting and receiving circuit, the main control module and the power line carrier transmitting circuit.
8. The tire pressure monitoring system of claim 7, wherein the first tire pressure sensor is provided with LF receiving and UHF transmitting circuits, and the tire pressure display is provided with LF transmitting and UHF receiving circuits.
9. The tire pressure monitoring system of claim 8, wherein the tire pressure monitoring device further comprises a second tire pressure sensor disposed on a tire of a vehicle head; the first tire pressure sensor is arranged on a tire of the trailer;
the second tire pressure sensor is also independently provided with an LF receiving circuit and an UHF transmitting circuit; and the second tire pressure sensor is in communication connection with the tire pressure display through radio frequency signals.
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| JP7057326B2 (en) | 2019-07-26 | 2022-04-19 | 株式会社デンソー | Power supply system while driving |
| JP7172900B2 (en) * | 2019-07-26 | 2022-11-16 | 株式会社デンソー | Power supply system while driving |
| CN111016555A (en) * | 2019-12-31 | 2020-04-17 | 深圳成谷科技有限公司 | Method and device for monitoring tire pressure of tractor and trailer based on OBU |
| CN113103830B (en) * | 2020-01-10 | 2022-07-15 | 比亚迪股份有限公司 | Tire pressure monitoring data transmission method and device, repeater unit and vehicle |
| DE102020100939A1 (en) * | 2020-01-16 | 2021-07-22 | Turck Holding Gmbh | Proximity switch and method for detecting an object to be detected |
| CN112440633A (en) * | 2020-11-19 | 2021-03-05 | 苏州并作汽车电子有限公司 | Rechargeable repeater system applied to tire pressure monitoring and control method thereof |
| CN114043828B (en) * | 2021-12-06 | 2024-05-31 | 铁将军汽车电子股份有限公司 | Tire pressure sensing device pairing calibration method, device and equipment |
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