CN108973544A - A kind of equipment using current detecting tire pressure - Google Patents
A kind of equipment using current detecting tire pressure Download PDFInfo
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- CN108973544A CN108973544A CN201810936027.XA CN201810936027A CN108973544A CN 108973544 A CN108973544 A CN 108973544A CN 201810936027 A CN201810936027 A CN 201810936027A CN 108973544 A CN108973544 A CN 108973544A
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- controller
- tire
- tire pressure
- voice signal
- driving current
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Classifications
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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
- B60C23/0486—Signalling devices actuated by tyre pressure mounted on the wheel or tyre comprising additional sensors in the wheel or tyre mounted monitoring device, e.g. movement sensors, microphones or earth magnetic field sensors
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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
- B60C23/0479—Communicating with external units being not part of the vehicle, e.g. tools for diagnostic, mobile phones, electronic keys or service stations
-
- 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
- B60C23/0486—Signalling devices actuated by tyre pressure mounted on the wheel or tyre comprising additional sensors in the wheel or tyre mounted monitoring device, e.g. movement sensors, microphones or earth magnetic field sensors
- B60C23/0488—Movement sensor, e.g. for sensing angular speed, acceleration or centripetal force
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
The present invention discloses a kind of equipment using current detecting tire pressure, the detection device includes: current detection circuit, speed probe and controller, controller is used to send instruction of skidding to battery management system, so that battery management system output driving current tire on the drive wheels becomes slipping state from stationary state, speed probe is used to detect the revolving speed of electric car, and revolving speed is sent to controller, current detection circuit, for detecting the driving current of battery management system output, and the driving current that will test is sent to controller, the driving current at tyre slip moment is obtained according to revolving speed by controller, and the corresponding tire pressure of driving current at tyre slip moment is obtained by driving current-air pressure function, so as to replace traditional direct-type detection mode, realize the intelligent measurement using electric current to electric car tire pressure , while cost is reduced, Detection accuracy is improved, the air pressure of tire can be known in real time by being also convenient for driver.
Description
Technical field
The present invention relates to tire testing technique field more particularly to a kind of equipment using current detecting tire pressure.
Background technique
With scientific and technological progress and the fast development of new energy technology, electric car is more next in the application of traffic and transport field
It is more extensive.For electric car, particularly with the electronic of the less pollution in small range logistics transportation, mostly used
Vehicle, mileage travelled is larger, and the vehicle in transportational process is also more intensive, for transportation safety, it is necessary to carry out to electric car
Real-time monitoring, in order to which driver can understand the state of each components of vehicle in time.
In numerous components, tire pressure is equivalent to the blood pressure of electric car, and the height of tire pressure is to electric car
Performance and power have vital effect.There is data to suggest that the traffic accident caused by blowing out is in pernicious traffic accident
Shared ratio is very high, and all tire pressure deficiencies that will cause in the factor blown out are when for first cause.This is not to alarm people to listen
It hears, therefore, it is necessary to improve the attention to vehicle tyre, avoids people and Che that serious damage occurs.
It is in the prior art, most of that tire pressure is detected using direct-type for the detection of electric car tire pressure,
Direct-type device for monitoring tyre pressure is the air pressure that tire is directly measured using the pressure sensor for being mounted on each wheel tyre cavity, benefit
Sent pressure information in central receiver module from inside tires with wireless transmitter, then to each tire pressure information into
Row display.
Wherein, pressure sensor is built in tire, erroneous for installation, since wheel is rotation in vehicle traveling,
So will appear error by pressure sensor measurement, measurement inaccuracy is caused.And battery is needed when pressure sensor work
Power supply, can not directly take electricity, therefore, when pressure sensor is out of power, the process for replacing battery is very complicated from automobile.Separately
Outside, the price of pressure sensor is higher, while also often it is possible that the problems such as failure.
Therefore, traditional direct-type detection mode how is replaced using more advanced technical method, is realized to electric car
The intelligent measurement of tire pressure, it has also become urgent problem to be solved.
Summary of the invention
In order to solve the above technical problem existing in the prior art, the embodiment of the present invention, which provides, a kind of utilizes current detecting
The equipment of tire pressure can be realized the intelligent measurement to electric car tire pressure, in order to which driver can be known in real time
The air pressure of tire.
In a first aspect, being applied to the present invention provides a kind of equipment using current detecting tire pressure to electric car
Tire carry out air pressure detection, which includes: current detection circuit, speed probe and controller；
The controller, for sending instruction of skidding to battery management system, so that battery management system output is driven
Streaming current tire on the drive wheels becomes slipping state from stationary state；
Revolving speed is sent to the controller for detecting the revolving speed of the electric car by the speed probe；
The current detection circuit, for detecting the driving current of the battery management system output, and will test
Driving current is sent to the controller；
The controller is also used to obtain the driving current at tyre slip moment according to the revolving speed, by driving current-gas
Pressure function obtains the corresponding tire pressure of driving current at the tyre slip moment；The driving current-air pressure function is preparatory
It obtains；At the time of the tyre slip moment is that the revolving speed becomes non-zero corresponding from 0.
Optionally, the driving current-air pressure function is obtained ahead of time in the controller specifically:
The controller, for obtaining the driving current at least two air pressures corresponding tyre slip moment respectively, by institute
The curve matching that drives current through for stating at least two air pressures and corresponding tyre slip moment obtains the driving electricity
Stream-air pressure function.
Optionally, the equipment using current detecting tire pressure further include: electric quantity detecting circuit；
The electric quantity detecting circuit, for obtaining the electric car in the electricity consumption of per stroke, and by the electricity consumption
Amount is sent to the controller；
The controller, for obtaining the corresponding tire pressure of the electricity consumption by electricity consumption-air pressure function；The electricity consumption
Amount-air pressure function is obtained ahead of time；By the tire pressure obtained by the electricity consumption and the wheel nausea obtained by the driving current
Pressure is done comparison and is verified mutually.
Optionally, the electricity consumption-air pressure function is obtained ahead of time in the controller specifically:
The controller, for obtaining the electricity consumption of the corresponding per stroke of at least two air pressures respectively, by it is described at least
The electricity consumption of two air pressures and corresponding per stroke obtains the electricity consumption-air pressure function by curve matching.
Optionally, the equipment using current detecting tire pressure further include: microphone module；
The microphone module, for obtaining the voice signal of tire and pavement friction；
The controller, for carrying out the frequency that spectrum analysis obtains the voice signal to the voice signal, by frequency
Rate-air pressure function obtains the corresponding tire pressure of frequency of the voice signal；The frequency-air pressure function is obtained ahead of time；It will
The tire pressure that is obtained by the driving current and by the tire pressure that the frequency of the voice signal obtains do comparison carry out it is mutual
Mutually verify.
Optionally, the equipment using current detecting tire pressure further include: microphone module；
The microphone module, for obtaining the voice signal of tire and pavement friction；
The controller, for carrying out the frequency that spectrum analysis obtains the voice signal to the voice signal, by frequency
Rate-air pressure function obtains the corresponding tire pressure of frequency of the voice signal；The frequency-air pressure function is obtained ahead of time；It will
The tire pressure that is obtained by the electricity consumption, the tire pressure obtained by the driving current and by the frequency of the voice signal
Any two in the tire pressure of acquisition compare and are verified mutually.
Optionally, the microphone module, for obtaining the voice signal at tyre slip moment and pavement friction；
The controller is also used before carrying out spectrum analysis to the voice signal and obtaining the frequency of the voice signal
In,
Screening is located at the controller and skids the instruction moment to battery management system transmission from the voice signal
To the fragment of sound signal sent to the battery management system between the instruction moment that stops skidding.
Optionally, the microphone module is also used to be obtained ahead of time the background noise signal when tire does not skid；
The controller, be also used to the voice signal carry out spectrum analysis obtain the voice signal frequency it
Before, the background noise signal is subtracted from the voice signal.
Optionally, the background noise signal being obtained ahead of time when the tire does not skid, specifically:
The background noise signal when tire does not skid, the background noise signal that will repeatedly obtain repeatedly are obtained in advance
It is averaged as final background noise signal；
The controller subtracts the background noise signal from the voice signal, specifically:
The controller subtracts the final background noise signal from the voice signal.
Optionally, the controller is that unique ID is arranged in the battery management system；
The controller sends the skidding instruction to the battery management system by the ID of the battery management system.
Optionally, the controller is located at electric car or is located at remote server.
Optionally, the equipment using current detecting tire pressure further include: remote server；
The controller is also used to the driving current being sent to remote server；
The remote server, for carrying out the variation song that analysis obtains electric current to the driving current by neural network
Line, and obtain according to the change curve air pressure of the automobile tire.
Compared with prior art, the present invention has at least the following advantages:
Equipment provided by the embodiments of the present application using current detecting tire pressure, applied to the tire to electric car into
Promoting the circulation of qi pressure detection, wherein detection device includes current detection circuit, speed probe and controller, and controller is used for battery
Management system sends instruction of skidding, so that battery management system output driving current tire on the drive wheels becomes skidding shape from stationary state
State, speed probe are used to detect the revolving speed of electric car, and revolving speed is sent to controller, current detection circuit, for examining
Survey the driving current of battery management system output, and the driving current that will test is sent to controller, by controller according to turn
Speed obtains the driving current at tyre slip moment, and the driving current at tyre slip moment is obtained by driving current-air pressure function
Corresponding tire pressure is realized using electric current so as to replace traditional direct-type detection mode to electric car wheel nausea
The intelligent measurement of pressure improves Detection accuracy while cost is reduced, and tire can be known in real time by being also convenient for driver
Air pressure.
Detailed description of the invention
In order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The some embodiments recorded in application, for those of ordinary skill in the art, without creative efforts,
It can also be obtained according to these attached drawings other attached drawings.
Fig. 1 is the exemplary diagram of electric car tire provided by the embodiments of the present application and ground face contact；
Fig. 2 is a kind of equipment structure chart using current detecting tire pressure provided by the embodiments of the present application；
Fig. 3 is another equipment structure chart for utilizing current detecting tire pressure provided by the embodiments of the present application；
Fig. 4 is a kind of microphone module installation site structure top view provided by the embodiments of the present application.
Specific embodiment
In order to enable those skilled in the art to better understand the solution of the present invention, below in conjunction in the embodiment of the present invention
Attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is only this
Invention a part of the embodiment, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art exist
Every other embodiment obtained under the premise of creative work is not made, shall fall within the protection scope of the present invention.
The technical solution provided to facilitate the understanding of the present invention below first carries out the background technique of technical solution of the present invention
Simple declaration.
It is well known that the height of tire pressure has vital effect to the performance and power of electric car, with
Electric car in communications and transportation using more and more extensive, how to realize that the accurate detection of tire pressure has become automotive field
Research hotspot.Inventor has found under study for action, at present for the electronic of the less pollution that uses in small range logistics transportation
The detection of air pressure of automobile tire, most of air pressure using direct-type device for monitoring tyre pressure detection tire, direct-type tire pressure monitoring
Device is the air pressure that tire is directly measured using the pressure sensor for being mounted on each wheel tyre cavity.
Since pressure sensor is built in tire, installation process is comparatively laborious, and in measurement process, with vehicle
The problems such as rotation of wheel, pressure sensor often will appear measurement error and itself break down.In addition, pressure sensor
Cost is also higher, and the cost of single pressure sensor generally will be between 500 yuan -1500 yuan.So traditional utilization pressure passes
The mode that sensor detects tire pressure is not only cumbersome, at high cost, but also accuracy rate is low, and the experience to driver is also poor.
And the scene of technical scheme application is exactly the pollution that mostly uses in small-scale logistics transportation environment
Lesser electric vehicle, mileage travelled is larger, and each electric vehicle is also more intensive during transportation.As shown in Figure 1, it shows
The exemplary diagram of electric car tire and ground face contact, during electric automobile during traveling, with the difference of tire pressure, tire
It is also different from the ground frictional force generated, and then driving current needed for tire is also different, when tire pressure is larger, wheel
Friction is small for tire and ground generation, and then driving current needed for tire is smaller；It is corresponding, when tire pressure is smaller
When, tire and the frictional force that ground generates are larger, and then driving current needed for tire is also larger.
Also, inventor also found under study for action, and battery management system (Battery Management System, referred to as
BMS certain functional relation) is presented to the driving current and tire pressure of tire output, when tire pressure is larger, battery management system
System, which only needs to export lesser driving current, can be driven tire and becomes slipping state from stationary state, when tire pressure is smaller,
Battery management system, which needs to export biggish driving current ability tire on the drive wheels, becomes slipping state from stationary state, that is,
It says, the driving current of tire pressure and battery management system output corresponds, and the two inversely, therefore, can basis
Driving current obtains tire pressure.
Based on this, the embodiment of the present application provides a kind of equipment using current detecting tire pressure, and controller is to battery
Management system sends instruction of skidding, so that battery management system output driving current tire on the drive wheels becomes skidding shape from stationary state
State, speed probe detects the revolving speed of electric car, and revolving speed is sent to controller, and current detection circuit detects cell tube
The driving current of reason system output, and the driving current that will test is sent to controller, is taken turns by controller according to revolving speed
The driving current at tire skidding moment, and by driving current-air pressure function acquisition tyre slip moment corresponding wheel of driving current
Air pressure utilizes electric current to the intelligent measurement of air pressure of automobile tire, so that in small-scale logistics transportation ring so as to realize
In border, driver can know the air pressure of tire, and can be according to the gas of tire when electric vehicle drive transports cargo in real time
Pressure judges whether on time to send cargo to destination.
Embodiment one
Below in conjunction with attached drawing to the equipment using current detecting tire pressure shown in the application exemplary embodiment into
Row is discussed in detail.
Referring to fig. 2, it illustrates a kind of device structures using current detecting tire pressure provided by the embodiments of the present application
Figure.
Equipment application provided by the embodiments of the present application carries out air pressure detection in the tire 204 to electric car, wherein electronic
The tire 204 of automobile refers to the tire of the electric vehicle of the less pollution used in small range logistics transportation, mileage travelled compared with
Greatly, the vehicle in transportational process also compares comparatively dense.
As shown in Fig. 2, the equipment provided by the embodiments of the present application using current detecting tire pressure include controller 202,
Speed probe 203, current detection circuit 201 and battery management system BMS205.
Wherein, controller 202 is used to send instruction of skidding to battery management system BMS205 (or motor), so that cell tube
Reason system BMS205 (or motor) output driving current tire on the drive wheels becomes slipping state from stationary state.
Speed probe 203 is used to detect the revolving speed of electric car, and revolving speed is sent to controller 202.
Current detection circuit 201 is used to detect the driving current of battery management system BMS205 (or motor) output, and will
The driving current detected is sent to controller 202.
Battery management system BMS105 realizes that battery physical parameter is real for connecting vehicle mounted dynamic battery and electric car
When monitoring, battery status estimation and vehicle component component the functions such as inline diagnosis and early warning.
Also, controller 202 can be also used for the driving current that the tyre slip moment is obtained according to revolving speed, by driving electricity
Stream-air pressure function obtains the corresponding tire pressure of driving current at tyre slip moment；The driving current-air pressure function obtains in advance
?；At the time of the tyre slip moment is that revolving speed becomes non-zero corresponding from 0.Meanwhile controller 202 both can be the vehicle control of automobile
Device processed, or the controller set in addition independently of entire car controller, moreover, controller 102 can be located at automobile,
It can be for positioned at remote server.
In practical applications, the air pressure of tire is the letter for the driving current that tire is subject to from stationary state to slipping state
Number, which exported from battery management system to tire.When tire pressure is larger, battery management system only needs defeated
Tire, which can be driven, in lesser driving current out becomes slipping state from stationary state, when tire pressure is smaller, battery management
System, which needs to export biggish driving current ability tire on the drive wheels, becomes slipping state from stationary state, and tire pressure does not need simultaneously
The driving current for wanting battery management system to export to it is also different, that is to say, that the air pressure of tire and driving current are one by one
It is corresponding.
Also, during concrete implementation, driving current-air pressure function can obtain for the preparatory test of many times that passes through
, and save in the controller, when controller gets what battery management system was exported to tire, so that tire is from stationary state
When becoming the driving current of slipping state, the drive at present tire skidding moment can be obtained according to driving current-air pressure function
The voltage of the corresponding tire of streaming current.Wherein, driving current can be the revolving speed that controller is sent according to speed probe, obtain
Tire skid the moment driving current, which is to be detected by current detection circuit and be sent to controller
's.
In some possible implementations of the application, driving current-air pressure function that controller is obtained ahead of time specifically:
Controller is used to obtain the driving current at least two air pressures corresponding tyre slip moment respectively, by it is described at least
The curve matching that drives current through at two air pressures and corresponding tyre slip moment obtains driving current-air pressure letter
Number.
In practical applications, curve matching refers to selecting curve type appropriate to be fitted observation data, and with fitting
Curvilinear equation analyze two variables between relationship.It is namely approximatively portrayed with full curve or than discrete point group institute on quasi-plane
A kind of data processing method of functional relation between the coordinate of expression.
During specific implementation, in advance to the drive of the tire pressure of the electric car of factory and battery management system output
Driving wheel tire is repeatedly tested from the driving current that stationary state becomes slipping state, obtains multiple discrete test datas, and benefit
It is carried out curve fitting with multiple discrete test datas, to obtain the functional relation between driving current and tire pressure.For example,
It is (I that driving current I, which is obtained ahead of time, with the discrete test data of corresponding tire pressure P0, P0)、(I1, P1) etc., then it can choose
Curve type more appropriate is fitted the driving current I of acquisition with the discrete test data of corresponding tire pressure P, most
Afterwards, corresponding function can be selected as the function of driving current and tire pressure according to the curve type of fitting, such as three times
Hermite spline curve, i.e. driving current-air pressure function.
It is understood that the various components loaded on vehicle are more, therefore, controller may need to control vehicle simultaneously
Upper multiple components work, in order to which the skidding instruction for guaranteeing that controller is sent can accurately be received by battery management system, book
Apply for that embodiment is that ID is arranged in battery management system, refers to so that controller sends to skid according to specified ID to battery management system
It enables.
In some possible implementations of the application, the controller is that unique ID is arranged in battery management system；It is described
Controller sends the skidding instruction to the battery management system by the ID of the battery management system.
In practical applications, can in advance by the ID of battery management system save in the controller, when controller need to
When battery management system sends skidding instruction, the ID of battery management system is obtained, by the ID of the battery management system to battery
Management system sends instruction of skidding, thus the accuracy rate that the instruction that improves work efficiency and skid is sent.
In the equipment provided by the embodiments of the present application using current detecting tire pressure, controller is used for battery management
System sends instruction of skidding, so that battery management system output driving current tire on the drive wheels becomes slipping state from stationary state,
Speed probe is used to detect the revolving speed of electric car, and revolving speed is sent to controller, current detection circuit, for detecting electricity
The driving current of pond management system output, and the driving current that will test is sent to controller, is obtained by controller according to revolving speed
The driving current at tyre slip moment is obtained, and corresponding by the driving current that driving current-air pressure function obtains the tyre slip moment
Tire pressure while cost is reduced, improve to realize the intelligent measurement using electric current to electric car tire pressure
Detection accuracy, but also driver can be with the air pressure of timely learning tire.
Embodiment two
The equipment composition and function using current detecting tire pressure are described using above-described embodiment, below in conjunction with attached
Figure describes to the realization of above equipment concrete function in detail.
Referring to Fig. 3, it illustrates another equipment knots for utilizing current detecting tire pressure provided by the embodiments of the present application
Composition.
Equipment application provided by the embodiments of the present application carries out air pressure detection in the tire 204 to electric car, such as Fig. 3 institute
Show, the equipment provided by the embodiments of the present application using current detecting tire pressure includes controller 202, speed probe 203, electricity
Current detection circuit 201, microphone module 207 and electric quantity detecting circuit 206.
Wherein, the function of speed probe 203 and current detection circuit 201 is consistent with the description of above-described embodiment one kind,
Details are not described herein again.
Microphone module 207 is used to obtain the voice signal of tire and pavement friction, and the acoustic information is sent to control
Device 202 processed.
The electricity consumption is sent to by electric quantity detecting circuit 206 for obtaining electric car in the electricity consumption of per stroke
Controller 202；
Controller 202 can not only realize that it outside the function that embodiment one describes, is also used to by electricity consumption-air pressure function
Obtain electricity consumption corresponding tire pressure of the electric car in per stroke of the transmission of electric quantity detecting circuit 206；And electricity consumption-gas
Pressure function is obtained ahead of time；Electricity consumption obtain tire pressure and by the tire pressure that the driving current obtains compare into
Row verifying mutually.
In practical applications, the air pressure of the electricity consumption and automobile tire of electric car is inversely proportional, this is because working as vapour
When the air pressure of wheel tire is lower, then the frictional force on tire and ground can be larger, and then just needs to consume more electricity and could protect
Demonstrate,prove the normally travel of automobile on the ground；Conversely, when the air pressure of automobile tire is higher, then the frictional force on tire and ground can be compared with
It is small, and then can guarantee the normally travel of automobile on the ground only necessary to consume less electricity.
Further, tire can be obtained according to the electricity consumption of electricity consumption-air pressure function and the per stroke of electric car
Air pressure, then the tire pressure value is compared with the tire pressure value obtained using driving current, if the difference of the two is
In error range that is preset, allowing, then show that battery management system is normal, while could also indicate that and detect using electricity consumption
Tire pressure is accurate.
If the two difference in error range that is preset, allowing, does not choose biggish atmospheric pressure value conduct in the two
Tire pressure, when the tire pressure obtained according to electricity consumption-air pressure function and electricity consumption is greater than the wheel obtained using driving current
When air pressure, show that the tire pressure obtained using driving current is gone wrong, since driving current and tire voltage one are a pair of
It answers, then shows that driving current goes wrong, can from which further follow that the current detection circuit of determining driving current and/or revolving speed pass
There is failure in sensor.Correspondingly, utilizing driving when the tire pressure obtained according to electricity consumption-air pressure function and electricity consumption is less than
When the tire pressure that electric current obtains, show that the tire pressure obtained using electricity consumption is gone wrong, due to electricity consumption and tire electricity
Pressure corresponds, then shows that the electricity consumption of unit of account mileage goes wrong, can from which further follow that the electricity of determining electricity consumption
There is failure in detection circuit.
Wherein, in some possible implementations of the application, electricity consumption-air pressure function that controller is obtained ahead of time is specific
Are as follows:
Controller is used to obtain the electricity consumption of the corresponding per stroke of at least two air pressures respectively, by least two gas
The electricity consumption of pressure and corresponding per stroke obtains electricity consumption-air pressure function by curve matching.
During specific implementation, the per stroke of the tire pressure to the electric car of factory and electric car in advance
Electricity consumption is repeatedly tested, and obtains multiple discrete test datas, and carry out curve fitting using multiple discrete test datas, from
And obtain the functional relation between electricity consumption and tire pressure.For example, electricity consumption T is obtained ahead of time with corresponding tire pressure P's
Discrete test data is (T0, P0)、(T1, P1) etc., then can choose curve type more appropriate to the electricity consumption T of acquisition with
The discrete test data of corresponding tire pressure P is fitted, finally, can select corresponding letter according to the curve type of fitting
Function of the number as electricity consumption and tire pressure, i.e. electricity consumption-air pressure function.
In some possible implementations of the application, controller 202 can not only be realized outside above-mentioned function, be also used to pair
The voice signal of tire and pavement friction that microphone module 207 is sent carries out the frequency that spectrum analysis obtains the voice signal,
The corresponding tire pressure of frequency of the voice signal is obtained by frequency-air pressure function；And frequency-air pressure function is to be obtained ahead of time
's；By the tire pressure obtained by driving current and comparison is done by the tire pressure of the frequency acquisition of voice signal to be tested mutually
Card.
In practical applications, microphone module 207 can be set on automobile tire, when battery management system output driving
When electric current tire on the drive wheels becomes slipping state from stationary state, start the voice signal for obtaining tire and pavement friction, until wheel
Tire, which skids, to be stopped, and the voice signal of the tire obtained within the above-mentioned period and pavement friction is sent to controller.
Wherein, the quantity and installation site of microphone module 207 can be set according to actual needs, wheat shown in Fig. 4
Gram 207 installation site of wind module is not only as an example, be defined specific location.If only installing a microphone on automobile
Module 207 can be installed in central frame beam part, be communicated with controller 202；If installing four microphone moulds
Four microphone modules, then can be mounted on the position of four tops corner of vehicle frame by block, and be established respectively with controller 202
Communication connection, so that controller 202 obtains voice signal by four microphone modules 207.It is, of course, also possible to other quantity
Microphone module 207, and according to actual installation reasonable quantity dispose microphone module 207 position.
The installation site of microphone module 207 in order to better understand, referring to fig. 4, it illustrates the embodiment of the present application to mention
A kind of microphone module installation site structure top view supplied.In Fig. 4, including four microphone modules, it is separately mounted to vehicle
It on four corners of top of the trellis, and establishes communicate to connect with controller 202 respectively, controller 202 is mounted on the middle part of vehicle frame
Point, four microphone modules 207 can work at the same time, and the voice signal of acquisition is sent to controller 202, controller 202
The voice signal that four different microphone modules 207 are sent can be distinguished according to reception delay.
In practical applications, the air pressure of automobile tire is the function of the corresponding frequency of voice signal, the frequency-air pressure function
It is obtained to first pass through test of many times in advance.When the corresponding frequency of the voice signal that controller analyzes present tire, can pass through
Above-mentioned function obtains corresponding tire air pressure.
Further, tire pressure can be obtained according to the frequency of frequency-air pressure function and voice signal, then by the tire
Atmospheric pressure value is compared with the tire pressure value obtained using driving current, if the difference of the two is in preset, permission
In error range, then show that battery management system is normal, while could also indicate that the frequency detecting wheel nausea using voice signal
Pressure is accurate.
If the two difference in error range that is preset, allowing, does not choose biggish atmospheric pressure value conduct in the two
Tire pressure is obtained when the tire pressure obtained according to the frequency of frequency-air pressure function and voice signal is greater than using driving current
When the tire pressure obtained, show that the tire pressure obtained using driving current is gone wrong, due to driving current and tire voltage
Correspond, then show that driving current goes wrong, can from which further follow that determining driving current current detection circuit and/or
There is failure in speed probe.Correspondingly, when the tire pressure that the frequency of frequency-air pressure function and voice signal obtains is less than
When the tire pressure obtained using driving current, show that the tire pressure obtained using the frequency of voice signal is gone wrong, by
It is corresponded in the frequency and tire voltage of voice signal, then shows that the frequency for obtaining voice signal goes wrong, it can be into one
Step show that failure occurs in the microphone module for obtaining voice signal.
Wherein, in some possible implementations, frequency-air pressure function that controller is obtained ahead of time specifically:
The frequency of voice signal when controller is used to obtain the corresponding skidding of at least two air pressures respectively, by described at least two
The frequency of voice signal obtains frequency-air pressure function by curve matching when a air pressure and corresponding skidding.
During specific implementation, in advance to the tire pressure and skidding of the electric car of factory when voice signal frequency
It is repeatedly tested, multiple discrete test datas is obtained, and carry out curve fitting using multiple discrete test datas, to obtain
Functional relation between frequency and tire pressure.For example, discrete test number of the frequency f with corresponding tire pressure P is obtained ahead of time
According to for (f0, P0)、(f1, P1), etc., then it can choose curve type more appropriate to frequency f with corresponding tire pressure P's
Discrete test data is fitted, finally, corresponding function can be selected as frequency and tire according to the curve type of fitting
The function of air pressure uses frequency-air pressure function.
In the application in other possible implementations, controller 202 can not only be realized outside above-mentioned function, be also used to
The voice signal of the tire and pavement frictions that send to microphone module 207 carries out the frequency that spectrum analysis obtains the voice signal
Rate is obtained the corresponding tire pressure of frequency of the voice signal by frequency-air pressure function；The frequency-air pressure function is preparatory
It obtains；Believe by the tire pressure obtained by the electricity consumption, the tire pressure obtained by the driving current and by the sound
Number the tire pressure that obtains of frequency in any two compare and verified mutually.
In practical applications, it can both be obtained according to the electricity consumption of electricity consumption-air pressure function and the per stroke of electric car
Obtain tire pressure；Tire pressure can also be obtained according to the frequency of frequency-air pressure function and voice signal, it can also be according to driving
Electric current-air pressure function and driving current obtain tire pressure, and then can will be in the tire pressure that obtained by these three modes
The atmospheric pressure values of any two be compared, if the difference that any two value makes the difference in three be all it is preset, allow
In error range, then it may indicate that using electric current or electricity consumption or frequency detecting tire pressure be all accurate.
If discovery has the difference of some value and other the two not default by making the difference to any two value in three
, allow error range in, then show that the tire pressure value goes wrong, if the tire pressure be using driving current obtain
, then show that the tire pressure obtained using driving current is gone wrong, since driving current and tire voltage correspond, then
Show that driving current goes wrong, can from which further follow that the current detection circuit and/or speed probe of determining driving current
There is failure；Correspondingly, showing the wheel nausea obtained using electricity consumption if obtaining to tire pressure using electricity consumption
Pressure goes wrong, and since electricity consumption and tire voltage correspond, then shows that the electricity consumption of unit of account mileage goes wrong, can
To from which further follow that failure occurs in the electric quantity detecting circuit of determining electricity consumption；Correspondingly, if the tire pressure is to utilize skidding
When voice signal frequency obtain, then show using voice signal frequency obtain tire pressure go wrong, due to
The frequency and tire voltage of voice signal correspond, then show that the frequency for obtaining voice signal goes wrong, can be further
Show that failure occurs in the microphone module for obtaining voice signal.
In some other possible implementation of the application, the microphone module, for obtaining the tyre slip moment
With the voice signal of pavement friction；
The controller is also used before carrying out spectrum analysis to the voice signal and obtaining the frequency of the voice signal
In,
Screening is located at the controller and skids the instruction moment to battery management system transmission from the voice signal
To the sound clip signal sent to the battery management system between the instruction moment that stops skidding.
In practical applications, due to being to send instruction of skidding from controller to battery management system, controller can be with
It saves and sends at the time of skid instruction, and filter out from all received voice signals tyre slip moment and pavement friction
Voice signal, so that controller, which carries out spectrum analysis to sound clip signal, obtains the corresponding frequency of sound clip signal,
The corresponding tire pressure of frequency of the sound clip signal is obtained by frequency-air pressure function again.
It is understood that can be acquired unavoidably when using the voice signal of microphone module acquisition tire and pavement friction
Other components reasons for its use voice signals, in order to guarantee controller when carrying out voice signal judgement, the sound judged
Signal is the voice signal of tire and pavement friction, improves the accuracy of subsequent judgement, and the embodiment of the present application is carried out in controller
Before voice signal judgement, it can also carry out being filtered the voice signal that microphone module acquires except making an uproar.
In some possible implementations of the application, the microphone module is also used to be obtained ahead of time the tire and does not have
There is background noise signal when skidding；
The controller, be also used to the voice signal carry out spectrum analysis obtain the voice signal frequency it
Before, the background noise signal is subtracted from the voice signal.
Wherein, the voice signal that background noise signal can generate for other components of vehicle, naturally it is also possible to be and vehicle
The voice signal that other relevant objects generate.
In practical applications, the background noise signal when tire being obtained ahead of time can not skidded is stored in controller
In, controller to voice signal carry out spectrum analysis before, by microphone module send voice signal subtract prestore it is upper
Background noise signal is stated, the voice signal when voice signal for guaranteeing controller analysis is tyre slip avoids background sound message
Number to analysis result influence, thus improve detection tire pressure accuracy.
In order to guarantee to remove the interference of background noise signal as much as possible, in some possible implementations of the application
In, the background noise signal being obtained ahead of time when the tire does not skid, specifically:
Background noise signal when tire does not skid repeatedly is obtained in advance, and the background noise signal repeatedly obtained is made even
Mean value is as final background noise signal；
The controller subtracts the background noise signal from the voice signal, specifically:
Controller subtracts the final background noise signal from voice signal.
In practical applications, the final background noise signal being obtained ahead of time can be stored in the controller, in controller
Before carrying out spectrum analysis to voice signal, final background noise signal is subtracted from voice signal and obtains final voice signal,
So that controller carries out the frequency that spectrum analysis obtains final voice signal to final voice signal, and then according to frequency-air pressure
Function obtains tire pressure, by more accurately removing background noise signal, further improves the standard of detection tire pressure
True property.
It is understood that when obtaining the voice signal at tyre slip moment and pavement friction using microphone module,
In order to guarantee controller when carrying out voice signal judgement, the voice signal judged is tyre slip moment and pavement friction
Voice signal, improves the accuracy of subsequent judgement, and the embodiment of the present application, can also be with before controller carries out voice signal judgement
Be filtered the voice signal that microphone module acquires, the description of specific filter process and above-mentioned filter process except making an uproar
Similar, details are not described herein again.
But it should be recognized that specifically removal background noise signal method can according to the feature of background noise signal,
It is eliminated using different filtering methods.For example, low pass filtered can be used if background noise signal is rendered as high-frequency characteristic
Wave method filters background noise signal；If characteristics of low-frequency is presented in background noise signal, corresponding high-pass filtering can be used
Method filters background noise signal.It is, of course, also possible to according to other attributes of background noise signal, using it is corresponding other
Method is removed, and the present embodiment is to this without limiting.
In some possible implementations of the application, the present embodiment can also utilize the gas of neural network detection tire
Pressure, specifically, the controller, is also used to the driving current being sent to the remote server；The remote server,
For carrying out the change curve that analysis obtains voice signal to the driving current by neural network, and it is bent according to the variation
Line obtains the air pressure of the automobile tire.
When practical application, the driving current at automobile tire skidding moment can be repeatedly obtained, multiple driving currents is utilized to instruct
Practice neural network, the neural network after being trained is skidded the moment since the neural network after training has obtained automobile tire
The change curve feature of driving current, therefore, the neural network after training can be special according to the change curve of input driving current
Sign, obtains the air pressure of automobile tire.
The driving current is sent to when controller receives the driving current of current detection circuit transmission based on this
Remote server obtains the change curve of driving current by remote server by the neural network after driving current input training
Feature, the driving current after training obtain the air pressure of automobile tire according to change curve feature.
Scheme through the foregoing embodiment can more accurately detect the voltage of tire, realize using driving current to electricity
The intelligent measurement of automobile wheel air pressure to the intelligent measurement of electric car tire pressure and utilizes frequency pair using electricity consumption
The intelligent measurement of electric car tire pressure improves Detection accuracy while cost is reduced, but also driver can be with
Tire pressure is known in real time.
It should be appreciated that in this application, " at least one (item) " refers to one or more, and " multiple " refer to two or two
More than a."and/or" indicates may exist three kinds of relationships, for example, " A and/or B " for describing the incidence relation of affiliated partner
It can indicate: only exist A, only exist B and exist simultaneously tri- kinds of situations of A and B, wherein A, B can be odd number or plural number.Word
Symbol "/" typicallys represent the relationship that forward-backward correlation object is a kind of "or"." at least one of following (a) " or its similar expression, refers to
Any combination in these, any combination including individual event (a) or complex item (a).At least one of for example, in a, b or c
(a) can indicate: a, b, c, " a and b ", " a and c ", " b and c ", or " a and b and c ", and wherein a, b, c can be individually, can also
To be multiple.
The above described is only a preferred embodiment of the present invention, being not intended to limit the present invention in any form.Though
So the present invention has been disclosed as a preferred embodiment, and however, it is not intended to limit the invention.It is any to be familiar with those skilled in the art
Member, without departing from the scope of the technical proposal of the invention, all using the methods and technical content of the disclosure above to the present invention
Technical solution makes many possible changes and modifications or equivalent example modified to equivalent change.Therefore, it is all without departing from
The content of technical solution of the present invention, according to the technical essence of the invention any simple modification made to the above embodiment, equivalent
Variation and modification, all of which are still within the scope of protection of the technical scheme of the invention.
Claims (12)
1. a kind of equipment using current detecting tire pressure, which is characterized in that carry out gas applied to the tire to electric car
Pressure detection, which includes: current detection circuit, speed probe and controller；
The controller, for sending instruction of skidding to battery management system, so that the battery management system output driving is electric
Flowing tire on the drive wheels becomes slipping state from stationary state；
Revolving speed is sent to the controller for detecting the revolving speed of the electric car by the speed probe；
The current detection circuit, for detecting the driving current of the battery management system output, and the driving that will test
Electric current is sent to the controller；
The controller is also used to obtain the driving current at tyre slip moment according to the revolving speed, by driving current-air pressure letter
Number obtains the corresponding tire pressure of driving current at the tyre slip moment；The driving current-air pressure function is obtained ahead of time；
At the time of the tyre slip moment is that the revolving speed becomes non-zero corresponding from 0.
2. the equipment according to claim 1 using current detecting tire pressure, which is characterized in that the controller, in advance
First obtain the driving current-air pressure function specifically:
The controller, for obtaining the driving current at least two air pressures corresponding tyre slip moment respectively, by it is described extremely
The curve matching that drives current through at few two air pressures and corresponding tyre slip moment obtains the driving current-gas
Press function.
3. the equipment according to claim 1 using current detecting tire pressure, which is characterized in that further include: electricity inspection
Slowdown monitoring circuit；
The electric quantity detecting circuit is sent out for obtaining the electric car in the electricity consumption of per stroke, and by the electricity consumption
Give the controller；
The controller, for obtaining the corresponding tire pressure of the electricity consumption by electricity consumption-air pressure function；The electricity consumption-
Air pressure function is obtained ahead of time；It is done by the tire pressure obtained by the electricity consumption and by the tire pressure that the driving current obtains
Comparison is verified mutually.
4. the equipment according to claim 3 using current detecting tire pressure, which is characterized in that the controller, in advance
First obtain the electricity consumption-air pressure function specifically:
The controller, for obtaining the electricity consumption of the corresponding per stroke of at least two air pressures respectively, by described at least two
The electricity consumption of air pressure and corresponding per stroke obtains the electricity consumption-air pressure function by curve matching.
5. the equipment according to claim 1 using current detecting tire pressure, which is characterized in that further include: microphone
Module；
The microphone module, for obtaining the voice signal of tire and pavement friction；
The controller, for carrying out the frequency that spectrum analysis obtains the voice signal to the voice signal, by frequency-gas
Pressure function obtains the corresponding tire pressure of frequency of the voice signal；The frequency-air pressure function is obtained ahead of time；It will be by described
Driving current obtain tire pressure and by the voice signal frequency obtain tire pressure do comparison verified mutually.
6. the equipment according to claim 3 using current detecting tire pressure, which is characterized in that further include: microphone
Module；
The microphone module, for obtaining the voice signal of tire and pavement friction；
The controller, for carrying out the frequency that spectrum analysis obtains the voice signal to the voice signal, by frequency-gas
Pressure function obtains the corresponding tire pressure of frequency of the voice signal；The frequency-air pressure function is obtained ahead of time；It will be by described
It tire pressure that electricity consumption obtains, the tire pressure obtained by the driving current and is obtained by the frequency of the voice signal
Any two in tire pressure compare and are verified mutually.
7. the equipment according to claim 5 or 6 using current detecting tire pressure, which is characterized in that the microphone
Module, for obtaining the voice signal at tyre slip moment and pavement friction；
The controller is also used to before carrying out spectrum analysis to the voice signal and obtaining the frequency of the voice signal,
From the voice signal screening be located at the controller to the battery management system send skid instruction the moment to
The battery management system sends the fragment of sound signal between the instruction moment that stops skidding.
8. the equipment according to claim 5 or 6 using current detecting tire pressure, which is characterized in that the microphone
Module is also used to be obtained ahead of time the background noise signal when tire does not skid；
The controller, before being also used to carry out the frequency that spectrum analysis obtains the voice signal to the voice signal, from
The background noise signal is subtracted in the voice signal.
9. the equipment according to claim 8 using current detecting tire pressure, which is characterized in that described that institute is obtained ahead of time
Background noise signal when tire does not skid is stated, specifically:
The background noise signal when tire does not skid repeatedly is obtained in advance, and the background noise signal repeatedly obtained is made even
Mean value is as final background noise signal；
The controller subtracts the background noise signal from the voice signal, specifically:
The controller subtracts the final background noise signal from the voice signal.
10. the equipment according to claim 1 using current detecting tire pressure, which is characterized in that the controller is
Unique ID is arranged in the battery management system；
The controller sends the skidding instruction to the battery management system by the ID of the battery management system.
11. -10 described in any item equipment using current detecting tire pressure according to claim 1, which is characterized in that described
Controller is located at electric car or is located at remote server.
12. -10 described in any item equipment using current detecting tire pressure according to claim 1, which is characterized in that also wrap
Include remote server；
The controller is also used to the driving current being sent to remote server；
The remote server, for carrying out the change curve that analysis obtains electric current to the driving current by neural network,
And the air pressure of the automobile tire is obtained according to the change curve.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810936027.XA CN108973544B (en) | 2018-08-16 | 2018-08-16 | Device for detecting tire pressure by using current |
| PCT/CN2019/100313 WO2020034933A1 (en) | 2018-08-16 | 2019-08-13 | Device for detecting tire pressure by using current |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810936027.XA CN108973544B (en) | 2018-08-16 | 2018-08-16 | Device for detecting tire pressure by using current |
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| Publication Number | Publication Date |
|---|---|
| CN108973544A true CN108973544A (en) | 2018-12-11 |
| CN108973544B CN108973544B (en) | 2020-09-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810936027.XA Active CN108973544B (en) | 2018-08-16 | 2018-08-16 | Device for detecting tire pressure by using current |
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| Country | Link |
|---|---|
| CN (1) | CN108973544B (en) |
| WO (1) | WO2020034933A1 (en) |
Cited By (2)
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| CN109017166A (en) * | 2018-08-16 | 2018-12-18 | 杭州容大智造科技有限公司 | A kind of equipment using sound detection tire pressure |
| WO2020034933A1 (en) * | 2018-08-16 | 2020-02-20 | 杭州容大智造科技有限公司 | Device for detecting tire pressure by using current |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108973543B (en) * | 2018-08-16 | 2021-05-04 | 杭州容大智造科技有限公司 | Equipment for detecting tire pressure by using electricity consumption |
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Also Published As
| Publication number | Publication date |
|---|---|
| WO2020034933A1 (en) | 2020-02-20 |
| CN108973544B (en) | 2020-09-08 |
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