CN110481249A - A kind of tire pressure leak detection method and tire pressure detecting device at a slow speed - Google Patents
A kind of tire pressure leak detection method and tire pressure detecting device at a slow speed Download PDFInfo
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- CN110481249A CN110481249A CN201910762588.7A CN201910762588A CN110481249A CN 110481249 A CN110481249 A CN 110481249A CN 201910762588 A CN201910762588 A CN 201910762588A CN 110481249 A CN110481249 A CN 110481249A
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- tire pressure
- tire
- value
- pressure value
- gas leakage
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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
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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
-
- 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
- B60C23/20—Devices for measuring or signalling tyre temperature only
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
A kind of tire pressure leak detection method and tire pressure detecting device at a slow speed.A kind of tire pressure leak detection method at a slow speed, comprising: obtain tire state data in real time and simultaneously form tire pressure state table, the tire state data includes acquisition time, current tire pressure value and matched when front tyre temperature value with the current tire pressure value；Based on sampling tire pressure value, obtained and the compatible sampling tire temperature value of the sampling tire pressure value from tire pressure state table；Determine the current tire pressure value group being adapted in the tire pressure state table with the sampling tire temperature value, the difference that front tyre temperature and the sampling tire temperature value are worked as corresponding to the current tire pressure value in the current tire pressure value group meets preset temperature threshold；Slow gas leakage detection ratio=(the highest tire pressure-sampling tire pressure value in the current tire pressure value group)/highest tire pressure value, the slow gas leakage detection ratio are greater than default rate value, it is determined that the slow gas leakage of tire.This mode carries out tire pressure gas leakage at a slow speed, does not need the specialized detection for additionally increasing various environmental parameter detections, does not also need additionally to increase development cost, and more accurately gas leakage detection at a slow speed may be implemented.
Description
Technical field
The present invention relates to a kind of automobile-used detection field more particularly to tire pressure, leak detection method and tire pressure detection are filled at a slow speed
It sets.
Background technique
Since tire is the important component of automobile chassis, the all-mass of automobile is not only carry, also to be given
Automobile, which advances, provides propulsive force, and plays the role of mitigating ground shock.Tire pressure monitoring system can in real time carry out tire
Monitoring reminds driver to pay attention to the security risk being likely to occur, plays the role of preventing accident in advance.Currently, main on the market
There are the tire pressure monitoring system of Infineon SP37 series, Freescale FXTH871 series, TPIC82000 series of TI etc., Suo Youfang
Case can monitor the key parameters such as the pressure, temperature and acceleration of tire and be emitted by high frequency radio wave (RF).It is existing
Some passenger cars using low frequency matching tool be successively read corresponding position tire monitoring module mark (ID) and be stored in
ID write-in electronic control unit (ECU) or work is matched with the connection of the diagnostics port of passenger car with tool the inside, then by harness
Tool is sent to ECU by RF, so that each tire of passenger car is positioned and be managed.
Tire pressure monitoring system mainly consists of two parts, and a part of sensor is mounted in the inside of tire, can pass through valve
Mouth is fixed on wheel hub, temperature, pressure, the acceleration situation of real-time monitoring tire.Second part is receiver, is mounted on driving
Driver is easy the position (have direct shown by instrument) of observation in cabin, can show current tire pressure, temperature and
Fault condition allows driver to understand the situation of tire.It is that letter is carried out by the wireless signal of high frequency between sensor and receiver
Number transmission.Be mounted on the sensor inside tire can the pressure and temperature to tire constantly measured, can be with by analysis
Judge tire whether gas leakage；If it find that having a flat tire, receiver is sent by the wireless signal of high frequency by result, is received
Device reminds driver to pay attention to tire fault by way of sound-light alarm.But above scheme has the rapid air leakage of tire
Preferable judgment, but when tire is by gas leakage at a slow speed, harm is big and is easy the case where there are under-enumerations generation.
Lianchuang Auto Electronic Co., Ltd. discloses a kind of method for detecting and having a flat tire 201010572341.8, every
Interval time T of setting detects the pressure value and temperature value of a tire；Judge whether the tire pressure value of continuous n times detection is every
It is secondary all constantly to reduce, and in the n times detection, the accumulative pressure reduction values of the tire are greater than the threshold value of setting；By
Last time temperature and pressure value before the pressure value of one-time detection to tire is reduced is denoted as T0, P0 respectively, and n-th is detected
The temperature and pressure value of the tire be denoted as TN, PN respectively, judge whether TN- (T0 × PN/P0) is more than or equal to 5；If continuous N
The tire pressure value of secondary detection is constantly reducing every time, and in the n times detection, the accumulative pressure reduction values of the tire
Greater than the threshold value of setting, while TN- (T0 × PN/P0) >=5, then it is judged as and has a flat tire.The present invention can effectively solve the problem that tire
Pressure monitoring system is for the false alarm problem that has a flat tire, so that alarm is more accurate.But above scheme is not considered outside
Temperature possible variation in portion's causes tire pressure value to change, for example, vehicle is continuously driving or outdoor toward the low area of temperature
Temperature declines in duration, thus also easily causes the false alarm problem having a flat tire.
Chongqing Chang'an Automobile Co., Ltd discloses a kind of detection of slow gas leakage of tire 201710264200.1
Method comprising the step of setting is with reference to tire pressure, calculate the step of compensation tire pressure and according to slow gas leakage standard determination whether
The step of slow gas leakage.The detection method can judge that tire is under conditions of excluding the influence to tire pressure such as environment and operating condition
No there are slow gas leakage, while avoiding improving testing cost.Although the program is in view of various environment and operating condition etc. are to tire pressure
It influences, but the setting of its step is extremely complex, for example at least over the judgement of 15 steps, thus causes the slow gas leakage of tire
Detection scheme step is complicated, does not have exploitativeness.
Summary of the invention
The purpose of the present invention is to provide a kind of tire pressure leak detection method at a slow speed, with solve to realize it is complicated, do not account for
Temperature change causes the technical issues of false alarm problem.
A kind of tire pressure leak detection method at a slow speed, comprising:
Tire state data is obtained in real time and forms tire pressure state table, when the tire state data includes acquisition
Between, current tire pressure value and with the current tire pressure value it is matched work as front tyre temperature value；
Based on sampling tire pressure value, obtained and the compatible sampling of the sampling tire pressure value from the tire pressure state table
Tire temperature value；
Determine the current tire pressure value group being adapted in the tire pressure state table with the sampling tire temperature value, it is described to work as front tyre
When the difference of front tyre temperature and the sampling tire temperature value meets preset temperature threshold corresponding to current tire pressure value in pressure value group；
Slow gas leakage detection ratio=(the highest tire pressure-sampling tire pressure value in the current tire pressure value group)/described is most
High tire pressure value, the slow gas leakage detection ratio are greater than default rate value, it is determined that the slow gas leakage of tire.
A kind of tire pressure leak detection method at a slow speed, comprising:
Tire state data is obtained in real time and forms tire pressure state table, when the tire state data includes acquisition
Between, current tire pressure value and with the current tire pressure value it is matched work as front tyre temperature value；
Based on sampling tire pressure value, obtained and the compatible sampling of the sampling tire pressure value from the tire pressure state table
Tire temperature value；
Determine the current tire pressure value group being adapted in the tire pressure state table with the sampling tire temperature value, it is described to work as front tyre
When the difference of front tyre temperature and the sampling tire temperature value meets preset temperature threshold corresponding to current tire pressure value in pressure value group；
Slow gas leakage detection reference value=(sampling tire pressure value/reference tire pressure value) or (sampling tire pressure value-reference tire pressure value), if
There is the case where continuous decline in slow gas leakage detection reference value, it is determined that the slow gas leakage of tire.
Compared with prior art, the invention has the following advantages that
Firstly, the applicant has found in the tire pressure experiment that gas leakage detects at a slow speed by multiple authentication, there is identical tire temperature value
Or tire temperature value takes one section of sampling time in smaller range, those in those sampling times correspond to the basic phase of tire pressure value at moment
Together, or in the difference range of one section of very little.If gas leakage at a slow speed occurs, tire pressure can become a raw downward trend or the difference
Or ratio can be more than a preset range, this mode carries out tire pressure gas leakage at a slow speed, does not need additionally to increase various environmental parameter inspections
The specialized detection of survey does not need many steps of additional yet and (both to existing receiver does not need additionally to increase yet
Development cost), more accurately gas leakage detection at a slow speed may be implemented, improve the precision of detection.
Secondly, this method detection do not need to occupy existing tire pressure data acquisition time period, it is only necessary to vehicle stopped working or
Triggering when being restarted, for example, receiver first triggers tire pressure gas leakage detection process at a slow speed, if air tight when vehicle is ignited every time
Then stop, starting tire pressure gas leak treatment process (as audible alarm occurs or passes through related personnel) at a slow speed if gas leakage, in vehicle
The hidden danger detected at the first time before traveling, promote the safety of vehicle driving.Moreover, when vehicle is stopped working or is restarted
Itself need to do some items (such as the work such as pairing, initialization), gas leakage detection will not occupy existing acquisition to tire pressure at a slow speed
Data report cycle, the effect of reaching preferable resource distribution.
Again: when gas leakage detects the tire pressure of the special cars such as racing car at a slow speed, detecting step of the invention is few and speed is fast,
The detection of those just applicable special cars, and those data be all it is recordable and traceable, facilitate its subsequent big
The development of the work in every of data analysis.
Detailed description of the invention
Fig. 1 is the schematic illustration that vehicular remote of the invention monitors tire pressure system in real time；
Fig. 2 is the principle flow chart of the first tire pressure leak detection method at a slow speed；
Fig. 3 is the example flow chart of the first tire pressure leak detection method at a slow speed；
Fig. 4 is the principle flow chart of second of tire pressure leak detection method at a slow speed；
Fig. 5 is the example flow chart of second of tire pressure leak detection method at a slow speed.
Specific embodiment
Below in conjunction with attached drawing, the present invention is illustrated.
Embodiment
Referring to Fig. 1, it monitors tire pressure systematic schematic diagram in real time for a kind of vehicular remote.It includes at least one acquisition tire
The automobile-used monitoring device of real time data, at least vehicle end processing display module 13 and cloud monitoring center 14.Wherein:
Automobile-used monitoring device can be installed on a trolley, real-time including each tire setting at least tire to vehicle
Data collector 11 and at least a receiver 12.Existing vehicle is generally that four tires exist in the process of moving by taking 4 wheel driven as an example
Work.Therefore, tire real-time data acquisition device 11 can be four, and each tire is set as a tire real-time data acquisition device
11.Tire real-time data acquisition device 11 can use the external STSM of existing ZUS (Smart Tire Safety Monitor).
That is, tire real-time data acquisition device can be tyre pressure sensor, and the tyre pressure sensor is mounted on the tire of corresponding tire
Valve cock.
The above is only a kind of citing, each wheel of sensor one, have it is external with built-in two kinds, appearance it is although small and exquisite but
Pressure test device, wireless base station apparatus and long-life batteries list are generally embeddedMember.Outer sensor is mounted on tire valve
On mouth, very simple is operated, substantially user buys back oneself and can install.Built-in sensors are mounted on inside tires, need
Tire is unloaded, also needs to do dynamic balancing after installing, process is relatively cumbersome, but is also matured product.Built-in sensors base
Originally tire pressure and temperature change can accurately be incuded, common error can control 0.1Bar and 2 DEG C or so.Outer sensor
It is connected to by valve cock with tire internal air pressure temperature, and by external environment influence, precision generally can also reach built-in
90% or more of sensor.The above tyre pressure sensor only illustrates.
This exemplary application is in the remote real-time monitoring tire pressure system in racing car, it is contemplated that racing car is special in re-type
Property, usually sensor is arranged on external valve cock, it is convenient quickly to be arranged during racing car.In addition, racing car is expert at
Speed is relatively rapid during sailing, therefore its wheel tire is easy heating in the process of moving, similarly on sensor and valve cock
Associated components generally use material resistant to high temperature.
Receiver 12 is that our company independently researches and develops, for receiving the vehicle driving by RF short range radio frequency communications mode
In the transmission of each tire real-time data acquisition device initial data, by the original data processing of different kinds of tyre at as unit of vehicle
The current tyre datas of all traveling tire current states of expression (whether current tyre data includes and is not limited to tire pressure, tire temperature, leaks
Gas, battery information), and with several seconds or several compressed data packets for showing the current tyre data of vehicle for being divided into period upload.
Receiver 12 can be made very small, and the data transfer mode between each sensor can be the radio frequency side RF
Formula, can be with low-power consumption with host computer (communication terminal as where vehicle end handles display module 13 or vehicle end processing display module)
Bluetooth carries out data transmission, it can be designed to existing receiver shape, and the interface that lights a cigarette in the car is arranged, is also possible to institute
Stating receiver is receiver or the vehicle intelligent equipment for being integrated with receiver function.The receiver is pluggable to be arranged point in the car
Cigarette interface.
Receiver may include that a control chip, RF short-range radio frequency module, wireless communication unit including USB interface exist
Interior vehicle-carrying communication unit and storage unit.Wireless communication unit mainly (generally refers to the processing of vehicle end and shows mould with host computer
Terminal where block 13) interaction bluetooth module.USB interface be used for updates control chip in software or pass through USB interface into
Row external charging unit is powered.Terminal where vehicle end handles display module 13 may include user terminal, such as intelligent hand
Machine, the terminal devices such as tablet computer.Wireless communication unit can be realized based on wireless communication technique and terminal and be connected.For example, nothing
Line communication unit can be bluetooth unit, i.e. wireless communication unit is communicated based on Bluetooth technology with terminal realization；Alternatively, channel radio
Letter unit can be WiFi unit, i.e. wireless communication unit is communicated based on WiFi technology with terminal realization；Alternatively, wireless communication is single
Member can be Zigbee unit, i.e. wireless communication unit is communicated based on ZigBee technology with terminal realization；Certainly, wireless communication is single
Member can also be the structure for supporting other communication technologys or communication protocol, not limit herein.
Wherein, wireless communication unit can pass through specific integrated circuit (Applica ti on-specific
Integrated circuit, ASIC), field programmable gate array (Field-Programmable Gate Arral, FPGA)
Either the structures such as other programmable logic device, discrete gate or transistor logic, discrete hardware components are realized, herein not
Give restriction.Wireless communication unit can be also used for receiving other instructions that terminal is sent, and can be parsed according to communication protocol should
Instruction, and the instruction after parsing can be sent to control chip, the instruction to be further processed by control chip.
Illustratively, the identity information of tyre pressure sensor may include the mark of tyre pressure sensor, the peace of tyre pressure sensor
One of holding position information etc. is a variety of, not limits herein.Wherein, the mark of tyre pressure sensor can refer to characterize
The unique identification of one tyre pressure sensor, or refer to tyre pressure sensor write mark, not limit herein.For example, tire
The installation site information of pressure sensor can be used for characterizing tyre pressure sensor be installed in the left front tire of vehicle, right front fire,
Left rear tire, right rear fire etc..Wherein, control chip is updated the identity information of tyre pressure sensor can be and believe identity
One of breath or much information are updated, and are not limited herein.In a scenario, if desired the tire pressure on vehicle is sensed
Device is replaced, and terminal can receive the identity information of the tyre pressure sensor after the replacement of user's input, for example, tyre pressure sensor
Mark etc..It specifically, can be right according to this with the mapping table of the mark of pre-established tyre pressure sensor and installation site information
Relation table is answered to be updated the mark of tyre pressure sensor.
Control chip can be by processor, controller, central processing unit (CentralProcessing Unit,
CPU), specific integrated circuit, field programmable gate array or other programmable logic device, discrete gate or transistor logic
What the components such as device, discrete hardware were realized, it not limits herein.
Control chip will match after the mark of the tyre pressure sensor of each tire received, for example the mark not only may be used
Identify whether it is to belong to tyre pressure sensor belonging to this vehicle, and can also match out the tyre pressure sensor and be installed in vehicle
Left front tire, right front fire, left rear tire, one of right rear fire location information.In addition, parsing tyre pressure sensor
Real-time original data processing after stored, then those data are processed into the compressed data by preliminary setting data format
Packet, and with second or several seconds, point or number be divided into the compressed data packets for showing the current tyre data of vehicle of period upload.
Specifically, storage unit can store the identity information for the tyre pressure sensor that control chip is sent, and for tire
Pressure sensor is that several tables of data are arranged in unit, stores the real time data of the tire in each tables of data, for example, tire pressure, tire temperature,
Whether gas leakage, battery information.
In integrated circuits, the circuit with store function of a not no physical form is also storage unit, such as RAM
(Random Access Memory effumability random access memory), FIFO (First Input First Output, first
Into first going out) memory etc.；In systems, the storage equipment with physical form is also storage unit, such as memory bar, RAM card
Deng.
Receiver can also include vehicle-carrying communication unit.Vehicle-carrying communication unit with by field-bus interface, RS232 interface or
Serial line interface etc. is realized.Certainly, vehicle-carrying communication unit can also include other implementations, if vehicle-carrying communication unit is wireless
Interface etc., vehicle-carrying communication unit may be implemented to carry out wired connection or wireless connection with car-mounted display equipment, not limit herein.
The present invention provides the principle of the first tire pressure leak detection method at a slow speed comprising (shown in Fig. 2):
S11: obtaining tire state data in real time and forms tire pressure state table, and the tire state data includes acquisition
Time, current tire pressure value and with the current tire pressure value it is matched work as front tyre temperature value；
S12: it based on sampling tire pressure value, is obtained from the tire pressure state table compatible with the sampling tire pressure value
Sample tire temperature value；
S13: determining the current tire pressure value group being adapted in the tire pressure state table with the sampling tire temperature value, described to work as
When the difference of front tyre temperature and the sampling tire temperature value meets preset temperature threshold corresponding to current tire pressure value in preceding tire pressure value group
Value；
S14: slow gas leakage detection ratio=(the highest tire pressure-sampling tire pressure value in the current tire pressure value group)/institute
Highest tire pressure value is stated, the slow gas leakage detection ratio is greater than default rate value, it is determined that the slow gas leakage of tire.
In step S12, the last item tire pressure record for not being used as sampling tire pressure value is found from tire pressure state table,
This records corresponding tire pressure value as sampling tire pressure value, and it is that the sampling tire pressure value is compatible that this, which records corresponding tire temperature value,
Sample tire temperature value.
In step S13, the current tire pressure value group being adapted in the tire pressure state table with the sampling tire temperature value is determined,
The adaptation refers to corresponding to the current tire pressure value in current tire pressure value group when the difference of front tyre temperature and the sampling tire temperature value
Meet preset temperature threshold.
Step S11 and step S12-S14 can be two individually parallel treatment progress, step S11 can with point or the second
Tire state data is obtained in real time for the period.And step S12-S14 carries out the slow gas leakage detection process of tire in which can be trigger-type.
For example, igniting triggers the slow gas leakage detection process of a tire every time.It does not need additionally to increase the special of various environmental parameter detections
Detection device, do not need yet many steps of additional (both to existing receiver and also do not need additionally increase exploitation at
This), more accurately gas leakage detection at a slow speed may be implemented, improve the precision of detection.
In order to become apparent from explanation, the present invention is based in above-mentioned system, provide the first tire pressure gas leakage detection side at a slow speed
The example of method (shown in Fig. 3).It should be noted that following steps can be sent from different components, this example core is
The step of processing and process, the component for issuing instruction is only a kind of citing, not the limitation present invention.The example includes:
S110: receiver receives real-time tire pressure of at least sensor upload including tire pressure value and tire temperature value,
It saves it in tire pressure state table, the record in the table includes that acquisition time, current tire pressure value and tire temperature value exist
Interior corresponding data information.
S120: start gas leakage detection process at a slow speed to receiver periodicity or event-triggered:
S121: obtaining sampling tire pressure value from tire pressure state table, find record where sampling tire pressure value it is corresponding
Tire temperature value；
S122: or the temperature difference identical as the tire temperature value is found in tire pressure state table and meets the preset temperature threshold
All records or part record, and form the corresponding current tire pressure value group of the temperature value；
S123: finding highest tire pressure value from current tire pressure value group, and slow gas leakage detection ratio is greater than a certain threshold value, and assert should
There is the possibility of gas leakage at a slow speed in tire, slow gas leakage detects ratio=(highest tire pressure-sampling tire pressure value)/highest tire pressure.
Starting to receiver event-triggered gas leakage detection process at a slow speed further comprises: receiver is plugged on cigar lighter and connects
Mouthful, when detecting that vehicle is stopped working or is restarted, gas leakage detects the starting of receiver trigger-type at a slow speed.
Sampling tire pressure value is obtained from tire pressure state table further comprises: tire pressure state table, which is found, not to be used as
The last item tire pressure record of tire pressure value is sampled, this records corresponding tire pressure value as sampling tire pressure value.Sample tire pressure value
Can the tire pressure value of last time as sampling tire pressure value, when last tire pressure value has been sampling tire pressure value, then never by
As finding tire pressure value in real time primary the latest in the real-time tire pressure value of sampling tire pressure value as tire pressure value.Step S122 is further wrapped
It includes: finding or the temperature difference identical as the tire temperature value preset in number of days in tire pressure state table and meet the preset temperature
All records of threshold value (for example, the temperature difference is within the scope of 3 degree)；Those all records are formed into current tire pressure value group, each note
Record further comprises acquisition time, current tire pressure value and tire temperature value, and whether does the identification information of over-sampling tire pressure value.This
Sample, obtain sampling tire pressure value can be easier and conveniently.
When detecting that slow gas leakage detection ratio is greater than a certain threshold value, repeat S121-S123, when time repeated
When number is threshold value N, if slow gas leakage detection ratio is both greater than a certain threshold value every time, or slow gas leakage detection ratio is greater than a certain threshold value
Number is greater than when presetting M time, then assert the possibility of tire presence gas leakage at a slow speed.Threshold value is an empirical value, in this example
It is 15%.For example, ten slow gas leakage detection ratios in one week of sampling, slow gas leakage detection ratio is greater than time of a certain threshold value
Number is greater than 7 times, then the tire has the possibility of gas leakage at a slow speed.In general, M should be less than or equal to N value.
In step S123 further include: save slow gas leakage detection ratio each time；In step S121 further include: find
After recording corresponding tire temperature value where the sampling tire pressure value, the corresponding current tire pressure value group of the tire temperature value is obtained, judges last meter
The slow gas leakage detection ratio of K of calculation is with the presence or absence of continuous rising or whether tire pressure numerical value continuously declines under the same tire temperature,
If so, there is the possibility (for example, K value can be sampled point value number of the span in seven days) of gas leakage at a slow speed in tire.
Find that there is identical tire temperature value or tire temperature value to take one section of sampling time in smaller range by multiple authentication, it should
The tire pressure value at those correspondence moment in a little sampling times is essentially identical, or in the difference range of one section of very little.If occurring slow
Fast gas leakage, tire pressure can become a raw downward trend or the difference or ratio can be more than a preset range, and this mode carries out tire
Gas leakage at a slow speed is pressed, the specialized detection for additionally increasing various environmental parameter detections is not needed, it is many not to need additional yet
The step of, detection is quickly and precision is high.
A kind of tire pressure gas leak detection device at a slow speed, it is real-time for uploading tire including the above-mentioned receiver referred to and at least one
The sensor of status data, wherein the receiver further comprises that control chip and memory, the memory further wrap
It includes:
Tire pressure state table: for storing the real-time tire pressure including tire pressure value and tire temperature value of the tire,
Corresponding data information of the record including acquisition time, current tire pressure value and tire temperature value in the table
Current tire pressure value group: or the temperature difference identical as storing tire temperature value meets all records of the preset temperature threshold
Or part records, the record includes the tire pressure value in tire temperature value and the corresponding record；
The control chip further comprises:
Real time data processing unit: real-time including tire pressure value and tire temperature value for receiving and saving sensor upload
Tire pressure saves it in tire pressure state table；
Gas leakage detection unit at a slow speed: start gas leakage detection process at a slow speed for periodicity or event-triggered:: from tire
Sampling tire pressure value is obtained in tire pressure state table, is found sampling tire pressure value place and is recorded corresponding tire temperature value；In tire pressure shape
All records or part record that or the temperature difference identical as the tire temperature value meets the preset temperature threshold are found in state table, forming should
The corresponding current tire pressure value group of temperature value；Highest tire pressure value is found from current tire pressure value group, slow gas leakage detection ratio is greater than a certain
Threshold value assert that the tire has the possibility of gas leakage at a slow speed, and slow gas leakage detects the ratio=sampling tire pressure value/highest tire pressure.
Gas leakage detection unit further comprises at a slow speed:
Sampled point collects subelement: for obtaining sampling tire pressure value from tire pressure state table, finding the sampling tire pressure
Corresponding tire temperature value is recorded where value；
Current tire pressure value group forms subelement: for finding or the temperature difference identical as the tire temperature value in tire pressure state table
All records or part for meeting the preset temperature threshold record, and form the corresponding current tire pressure value group of the temperature value；
Slow gas leakage detection ratio computation subunit: for finding highest tire pressure value from current tire pressure value group, slow leakage is calculated
Gas detection ratio, the slow gas leakage detect ratio=(highest tire pressure-sampling tire pressure value)/highest tire pressure；
Contrast subunit: comparing for slow gas leakage detection ratio with threshold value, if slow gas leakage detection ratio is greater than a certain threshold value,
Assert that the tire has the possibility of gas leakage at a slow speed, otherwise just terminating this, gas leakage detects at a slow speed.
Gas leakage detection unit at a slow speed further include:
Downward trend judgment sub-unit: the K slow gas leakage detection ratios for judging finally to calculate are with the presence or absence of continuous
It rises or whether tire pressure numerical value continuously declines under the same tire temperature, if so, tire has the possibility of gas leakage at a slow speed, otherwise
Terminating this, gas leakage detects at a slow speed.
The present invention provides second of tire pressure leak detection method at a slow speed, and principle includes (shown in Fig. 4):
S21: obtaining tire state data in real time and forms tire pressure state table, and the tire state data includes acquisition
Time, current tire pressure value and with the current tire pressure value it is matched work as front tyre temperature value；
S22: it based on sampling tire pressure value, is obtained from the tire pressure state table compatible with the sampling tire pressure value
Sample tire temperature value；
S23: determining the current tire pressure value group being adapted in the tire pressure state table with the sampling tire temperature value, described to work as
When the difference of front tyre temperature and the sampling tire temperature value meets preset temperature threshold corresponding to current tire pressure value in preceding tire pressure value group
Value；
S24: slow gas leakage detection reference value=(sampling tire pressure value/reference tire pressure value) or (sampling tire pressure value-reference tire pressure
Value), if there is the case where continuous decline in slow gas leakage detection reference value, it is determined that the slow gas leakage of tire, the reference tire pressure value is pre-
Tire pressure mean value in first setting value or the tire pressure value group.
Reference tire pressure value can first pass through experimental data, obtain the reference tire pressure value of a certain specific the temperature difference range adaptation.Or
Person, reference tire pressure value are the tire pressure mean value in tire pressure value group, the tire pressure mean value after can also removing abnormal tire pressure value.
Based on disclosed system, the present invention provides the examples of second of tire pressure leak detection method at a slow speed.(Fig. 5 institute
Show), it includes:
S210: receiver receives real-time tire pressure of at least sensor upload including tire pressure value and tire temperature value,
It saves it in tire pressure state table, the record in the table includes that acquisition time, current tire pressure value and tire temperature value exist
Interior corresponding data information；
S220: start gas leakage detection process at a slow speed to receiver periodicity or event-triggered:
S221: obtaining sampling tire pressure value from tire pressure state table, find record where sampling tire pressure value it is corresponding
Tire temperature value；
S222: or the temperature difference identical as the tire temperature value is found in tire pressure state table and meets the preset temperature threshold
All records or part record, and form the corresponding current tire pressure value group of the temperature value；
S223: saving slow gas leakage detection reference value in current tire pressure value group, and slow gas leakage detection reference value is sampling tire pressure
Value/reference tire pressure value or sampling tire pressure value-reference tire pressure value；
S224: judge that X slow gas leakage detects reference value recently in current tire pressure value group, if there are the feelings continuously declined
Condition, if tire has the possibility of gas leakage at a slow speed.
X slow gas leakage detection reference value at least should include 7 days gas leakage detection process at a slow speed in step S224.If occurring
Gas leakage at a slow speed, tire pressure can become a raw downward trend, and this mode carries out tire pressure gas leakage at a slow speed, do not need additionally to increase various rings
The specialized detection of border parameter detecting does not need many steps of additional yet, and detection is quickly and precision is high.
Starting to receiver event-triggered gas leakage detection process at a slow speed further comprises: receiver is plugged on cigar lighter and connects
Mouthful, when detecting that vehicle is stopped working or is restarted, gas leakage detects the starting of receiver trigger-type at a slow speed.
Step S222 further comprises: found in tire pressure state table preset in number of days with the tire temperature value phase
The same or temperature difference meets all records of the preset temperature threshold；Those all records are formed into current tire pressure value group, each
Record further comprises acquisition time, current tire pressure value and tire temperature value, and whether does the identification information of over-sampling tire pressure value.
Sampling tire pressure value is obtained from tire pressure state table further comprises: tire pressure state table, which is found, is not used as sampling tire pressure
The last item tire pressure of value records, and item records corresponding tire pressure value as sampling tire pressure value.The above is only for example, sampling tire
Pressure value can also with the real-time tire pressure value of interval some time point sampling, such as from point on the basis of last time in real time tire pressure value, with
Interval several time points looks for forward sampling tire pressure value.
A kind of accordingly tire pressure gas leak detection device at a slow speed, including receiver and at least one is for uploading tire real-time status
The sensor of data, wherein the receiver further comprises control chip and memory, the memory further comprises:
Tire pressure state table: for storing the real-time tire pressure including tire pressure value and tire temperature value of the tire,
Corresponding data information of the record including acquisition time, current tire pressure value and tire temperature value in the table
Current tire pressure value group: or the temperature difference identical as storing tire temperature value meets all records of the preset temperature threshold
Or part records, the record includes the tire pressure value in tire temperature value and the corresponding record；
The control chip further comprises:
Real time data processing unit: real-time including tire pressure value and tire temperature value for receiving and saving sensor upload
Tire pressure saves it in tire pressure state table；
Gas leakage detection unit at a slow speed: start gas leakage detection process at a slow speed for periodicity or event-triggered:: from tire
Sampling tire pressure value is obtained in tire pressure state table, is found sampling tire pressure value place and is recorded corresponding tire temperature value；In tire pressure shape
All records or part record that or the temperature difference identical as the tire temperature value meets the preset temperature threshold are found in state table, forming should
The corresponding current tire pressure value group of temperature value；Slow gas leakage detection reference value is saved in current tire pressure value group, slow gas leakage detects reference value
For sampling tire pressure value/reference tire pressure value or sampling tire pressure value-reference tire pressure value；Judge in current tire pressure value group X times slow recently
Gas leakage detects reference value, if the case where there are continuous declines, if there is the possibility of gas leakage at a slow speed in tire.
Gas leakage detection unit further comprises at a slow speed:
Sampled point collects subelement: for obtaining sampling tire pressure value from tire pressure state table, finding the sampling tire pressure
Corresponding tire temperature value is recorded where value；
Current tire pressure value group forms subelement: for finding or the temperature difference identical as the tire temperature value in tire pressure state table
All records or part for meeting the preset temperature threshold record, and form the corresponding current tire pressure value group of the temperature value；
Slow gas leakage detects reference value computation subunit: for calculating slow gas leakage detection reference value, slow gas leakage detects reference value
For sampling tire pressure value/reference tire pressure value or sampling tire pressure value-reference tire pressure value；
Contrast subunit: for judging that X slow gas leakage detects reference value recently in current tire pressure value group, if there is company
The case where continuous decline, if tire has the possibility of gas leakage at a slow speed.
Those of ordinary skill in the art will appreciate that realizing all or part of the process in above-described embodiment method, being can be with
Relevant hardware is instructed to complete by computer program, the program can be stored in one or more non-volatile computers
In read/write memory medium, the program is when being executed, it may include such as the process of the embodiment of above-mentioned each method.Wherein, the application
To any reference of memory, storage, database or other media used in provided each embodiment, may each comprise non-
Volatibility and/or volatile memory.Nonvolatile memory may include read-only memory (ROM), programming ROM (PROM),
Electrically programmable ROM (EPROM), electrically erasable ROM (EEPROM) or flash memory.Volatile memory may include arbitrary access
Memory (RAM) or external cache.By way of illustration and not limitation, RAM is available in many forms, such as static
RAM (SRAM), dynamic ram (DRAM), synchronous dram (SDRAM), double data rate sdram (DDRSDRAM), enhanced SDRAM
(ESDRAM), synchronization link (Synchlink) DRAM (SLDRAM), memory bus (Rambus) directly RAM (RDRAM), straight
Connect memory bus dynamic ram (DRDRAM) and memory bus dynamic ram (RDRAM) etc..
It will be understood by those skilled in the art that being only part-structure relevant to application scheme, do not constitute to this
The restriction of equipment or component that application scheme is applied thereon, specific equipment may include more more or less than as shown in the figure
Component, perhaps combine certain components or with different component layouts.In one embodiment, vehicle provided by the present application
It can be implemented as a kind of form of computer program with remote real-time monitoring tire pressure, computer program can be in upper common apparatus or each
It is run in the automobile-used terminal of kind intelligence.The each program module for forming the device, each program mould can be stored in the memory of equipment
The computer program that block is constituted makes processor execute the long-range real-time prison of each embodiment of the application described in this specification
Control the step in tire pressure method.
In one embodiment, a kind of vehicle intelligent equipment is provided, including memory and processor, memory are stored with
Computer program, when computer program is executed by processor, so that the step of processor executes above-mentioned real time monitoring tire pressure method.
In one embodiment, a kind of computer readable storage medium is provided, computer program, computer journey are stored with
When sequence is executed by processor, so that the step of processor executes above-mentioned real time monitoring tire pressure method.Monitor tire pressure side in real time herein
The step of method, can be the step in the real time monitoring tire pressure method of above-mentioned each embodiment.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.Use above specific case is illustrated the present invention, only
It is used to help understand the present invention, be not intended to limit the invention.For those skilled in the art, according to this
The thought of invention can also make several simple deductions, deformation or replacement.
Claims (18)
1. a kind of tire pressure leak detection method at a slow speed characterized by comprising
Tire state data is obtained in real time and forms tire pressure state table, the tire state data includes acquisition time, when
Preceding tire pressure value and with the current tire pressure value it is matched work as front tyre temperature value；
Based on sampling tire pressure value, obtained and the compatible sampling tire temperature of the sampling tire pressure value from the tire pressure state table
Value；
Determine the current tire pressure value group being adapted in the tire pressure state table with the sampling tire temperature value, the current tire pressure value
When the difference of front tyre temperature and the sampling tire temperature value meets preset temperature threshold corresponding to current tire pressure value in group；
Slow gas leakage detection ratio=(the highest tire pressure-sampling tire pressure value in the current tire pressure value group)/highest tire
Pressure value, the slow gas leakage detection ratio are greater than default rate value, it is determined that the slow gas leakage of tire.
2. the method as described in claim 1, which is characterized in that further comprise based on sampling tire pressure value:
The last item tire pressure record for not being used as sampling tire pressure value is found from tire pressure state table, this records corresponding
Tire pressure value is as sampling tire pressure value.
3. the method as described in claim 1, which is characterized in that further include:
Receiver is plugged on cigar lighter socket, and when detecting that vehicle is stopped working or is restarted, the starting of receiver trigger-type is based on
Sample the slow gas leakage detection process of tire of tire pressure value.
4. method according to claim 1 or 2, which is characterized in that determine in the tire pressure state table with the sampling
The current tire pressure value group of tire temperature value adaptation further comprises:
Or the temperature difference identical as the tire temperature value preset in number of days is found in tire pressure state table meets the default temperature
Spend all records of threshold value；
Those all records are formed into current tire pressure value group, each record further comprises acquisition time, current tire pressure value
With tire temperature value, and the identification information of over-sampling tire pressure value whether is done.
5. the method as described in claim 1, which is characterized in that further include:
Save slow gas leakage detection ratio each time；
The slow gas leakage detection ratio of K that judgement finally calculates is with the presence or absence of continuous rising or the tire pressure numerical value under the same tire temperature
Whether continuously decline, if so, determining the slow gas leakage of tire, K is greater than 2.
6. the method as described in claim 1, which is characterized in that slow gas leakage detection ratio is 15%.
7. a kind of tire pressure leak detection method at a slow speed characterized by comprising
Tire state data is obtained in real time and forms tire pressure state table, the tire state data includes acquisition time, when
Preceding tire pressure value and with the current tire pressure value it is matched work as front tyre temperature value；
Based on sampling tire pressure value, obtained and the compatible sampling tire temperature of the sampling tire pressure value from the tire pressure state table
Value；
Determine the current tire pressure value group being adapted in the tire pressure state table with the sampling tire temperature value, the current tire pressure value
When the difference of front tyre temperature and the sampling tire temperature value meets preset temperature threshold corresponding to current tire pressure value in group；
Slow gas leakage detection reference value=(sampling tire pressure value/reference tire pressure value) or (sampling tire pressure value-reference tire pressure value), if slow leakage
Gas detects reference value and there is the case where continuous decline, it is determined that the slow gas leakage of tire, the reference tire pressure value be preset value or
Tire pressure mean value in the tire pressure value group.
8. the method for claim 7, which is characterized in that include at least slow gas leakage in seven days and detect reference value in the presence of continuous
Decline, it is determined that the slow gas leakage of tire.
9. the method for claim 7, which is characterized in that
Receiver is plugged on cigar lighter socket, and when detecting that vehicle is stopped working or is restarted, the starting of receiver trigger-type is based on
Sample the slow gas leakage detection of tire pressure value tire.
10. the method for claim 7, which is characterized in that obtain sampling tire pressure value from tire pressure state table into one
Step includes:
Tire pressure state table finds the last item tire pressure record for not being used as sampling tire pressure value, this records corresponding tire pressure
Value is as sampling tire pressure value.
11. the method as described in claim 7 or 9, which is characterized in that determine in the tire pressure state table with the sampling
The current tire pressure value group of tire temperature value adaptation further comprises:
Or the temperature difference identical as the tire temperature value preset in number of days is found in tire pressure state table meets the default temperature
Spend all records of threshold value；
Those all records are formed into current tire pressure value group, each record further comprises acquisition time, current tire pressure value
With tire temperature value, and the identification information of over-sampling tire pressure value whether is done.
12. a kind of tire pressure gas leak detection device at a slow speed, which is characterized in that including receiver and at least one is real-time for uploading tire
The sensor of status data, wherein the receiver further comprises that control chip and memory, the memory further wrap
It includes:
Tire pressure state table: described for storing the real-time tire pressure including tire pressure value and tire temperature value of the tire
Corresponding data information of the record including acquisition time, current tire pressure value and tire temperature value in table；
Current tire pressure value group: or the temperature difference identical as storing tire temperature value meets all records or the portion of the preset temperature threshold
Member record, the record include the tire pressure value in tire temperature value and the corresponding record；
The control chip further comprises:
Real time data processing unit: for receiving and saving real-time tire pressure of the sensor upload including tire pressure value and tire temperature value
Information saves it in tire pressure state table；
Gas leakage detection unit at a slow speed: start gas leakage detection process at a slow speed for periodicity or event-triggered:: from tire pressure
Sampling tire pressure value is obtained in state table, is found sampling tire pressure value place and is recorded corresponding tire temperature value；In tire pressure state table
In find or the temperature difference identical as the tire temperature value meet the preset temperature threshold all records or part record, form the temperature value
Corresponding current tire pressure value group；Highest tire pressure value is found from current tire pressure value group, slow gas leakage detection ratio is greater than a certain threshold value,
Assert that the tire has the possibility of gas leakage at a slow speed, slow gas leakage detects ratio=(highest tire pressure-sampling tire pressure value)/highest tire pressure.
13. device as claimed in claim 12, which is characterized in that gas leakage detection unit further comprises at a slow speed:
Sampled point collects subelement: for obtaining sampling tire pressure value from tire pressure state table, finding the sampling tire pressure value institute
Recording corresponding tire temperature value；
Current tire pressure value group forms subelement: meeting for finding or the temperature difference identical as the tire temperature value in tire pressure state table
All records of the preset temperature threshold or part record, and form the corresponding current tire pressure value group of the temperature value；
Slow gas leakage detection ratio computation subunit: for finding highest tire pressure value from current tire pressure value group, slow gas leakage inspection is calculated
Ratio is surveyed, the slow gas leakage detects ratio=(highest tire pressure-sampling tire pressure value)/highest tire pressure；
Contrast subunit: comparing for slow gas leakage detection ratio with threshold value, if slow gas leakage detection ratio is greater than a certain threshold value, determines
The slow gas leakage of tire.
14. device as claimed in claim 13, which is characterized in that gas leakage detection unit at a slow speed further include:
Downward trend judgment sub-unit: K for judging finally to calculate slow gas leakage detection ratios rise with the presence or absence of continuous or
Whether person's tire pressure numerical value under the same tire temperature continuously declines, if so, determining the slow gas leakage of tire.
15. a kind of tire pressure gas leak detection device at a slow speed, which is characterized in that including receiver and at least one is real-time for uploading tire
The sensor of status data, wherein the receiver further comprises that control chip and memory, the memory further wrap
It includes:
Tire pressure state table: described for storing the real-time tire pressure including tire pressure value and tire temperature value of the tire
Corresponding data information of the record including acquisition time, current tire pressure value and tire temperature value in table；
Current tire pressure value group: or the temperature difference identical as storing tire temperature value meets all records or the portion of the preset temperature threshold
Member record, the record include the tire pressure value in tire temperature value and the corresponding record；
The control chip further comprises:
Real time data processing unit: for receiving and saving real-time tire pressure of the sensor upload including tire pressure value and tire temperature value
Information saves it in tire pressure state table；
Gas leakage detection unit at a slow speed: start gas leakage detection process at a slow speed for periodicity or event-triggered:: from tire pressure
Sampling tire pressure value is obtained in state table, is found sampling tire pressure value place and is recorded corresponding tire temperature value；In tire pressure state table
In find or the temperature difference identical as the tire temperature value meet the preset temperature threshold all records or part record, form the temperature value
Corresponding current tire pressure value group；Slow gas leakage detection reference value is saved in current tire pressure value group, slow gas leakage detection reference value is (to adopt
Sample tire pressure value/reference tire pressure value) or (sampling tire pressure value-reference tire pressure value)；Judge X slow leakage recently in current tire pressure value group
Gas detects reference value, if it exists the case where continuous decline, it is determined that the slow gas leakage of tire, the reference tire pressure value are preset value
Or the tire pressure mean value in the tire pressure value group.
16. device as claimed in claim 15, which is characterized in that gas leakage detection unit further comprises at a slow speed:
Sampled point collects subelement: for obtaining sampling tire pressure value from tire pressure state table, finding the sampling tire pressure value institute
Recording corresponding tire temperature value；
Current tire pressure value group forms subelement: meeting for finding or the temperature difference identical as the tire temperature value in tire pressure state table
All records of the preset temperature threshold or part record, and form the corresponding current tire pressure value group of the temperature value；
Slow gas leakage detects reference value computation subunit: for calculating slow gas leakage detection reference value, slow gas leakage detection reference value is (to adopt
Sample tire pressure value/reference tire pressure value) or (sampling tire pressure value-reference tire pressure value)；
Contrast subunit: for judging that X slow gas leakage detects reference value recently in current tire pressure value group, if under existing continuously
The case where drop, if tire has the possibility of gas leakage at a slow speed.
17. a kind of readable storage medium storing program for executing is stored with program, when described program is executed by processor, any one of claim 1 to 10 institute
The step of stating method.
18. a kind of vehicle intelligent equipment, including memory and processor, the memory is stored with program, and described program is by institute
When stating processor execution, so that the processor is executed such as the step of any one of claims 1 to 11 the method.
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| CN201910762588.7A CN110481249B (en) | 2019-08-16 | 2019-08-16 | Tire pressure slow air leakage detection method and tire pressure detection device |
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| CN201910762588.7A CN110481249B (en) | 2019-08-16 | 2019-08-16 | Tire pressure slow air leakage detection method and tire pressure detection device |
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| CN112265417A (en) * | 2020-09-30 | 2021-01-26 | 赛轮集团股份有限公司 | Off-highway giant tire slow air-spreading automatic detection method |
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