CN104057790A - Method and system for automatically recognizing positions of left wheel and right wheel - Google Patents
Method and system for automatically recognizing positions of left wheel and right wheel Download PDFInfo
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- CN104057790A CN104057790A CN201410314615.1A CN201410314615A CN104057790A CN 104057790 A CN104057790 A CN 104057790A CN 201410314615 A CN201410314615 A CN 201410314615A CN 104057790 A CN104057790 A CN 104057790A
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Abstract
The invention provides a method and system for automatically recognizing the positions of a left wheel and a right wheel. The method comprises the steps that two three-axis acceleration sensors are installed on the left wheel and the right wheel of a mobile device respectively, are in mirror symmetry and include the left three-axis acceleration sensor and the right three-axis acceleration sensor; in the forwards-traveling process of the mobile device, when the output quantity of a third coordinate axis reaches to the maximum, the output quantity of a second coordinate axis of the right three-axis acceleration sensor is right in the zero crossing point from negative to positive, and the output quantity of a second coordinate axis of the left three-axis acceleration sensor is right in the zero crossing point from positive to negative; the left wheel and the right wheel are recognized according to the y-axis output characteristic difference of the left three-axis acceleration sensor and the right three-axis acceleration sensor when the output quantity of the third coordinate axis reaches to the maximum. According to the method and system, the additional hardware cost is not added, the labor calibration cost can be reduced, and the installing efficiency of a tire pressure monitoring sensor is improved.
Description
Technical field
The invention belongs to electronic communication field, relate to a kind of automotive safety monitoring system, particularly relate to a kind of left and right wheels position automatic identifying method and system.
Background technology
In the system for monitoring automotive tire pressure, tire has been equipped with pressure sensor, and this pressure sensor sends the metrical information of tire pressure to the processing unit in automobile by wireless link.After the processed cell processing of such pressure information for show or send warning signal.In the time sending pressure measurement information, each sensor also needs transmission to make code or the identifier that self can be identified.For system can correctly be worked, processing unit must be able to be determined the corresponding wheel of received pressure information.
In order to address the above problem, the receptor that some systems are processing unit has been equipped with four receiving wires, and these four receiving wires lay respectively at position approaching with each wheel on car chassis, the corresponding wheel of each antenna.Antenna is connected to receptor by cable.Each antenna is associated with a wheel position (left front, right front, left back, right back).Then, the peak signal gathering by each antenna is located wheel, and described peak signal is corresponding to the signal of sensor emission of wheel by approaching most this antenna.Although solved like this wheel identification problem, also increase hardware cost simultaneously, because these systems need to arrange an antenna and this antenna is connected to receptor by coaxial cable each wheel, this means the increase that difficulty and system cost are installed.
In addition, also there are some systems to adopt each transmitter is carried out to identity configuration, to send the identification signal (will be called below ID signal) that represents its identity together with pressure signal.Simultaneously, whether receiver conforms to self predefined each in reference to No. ID one receiving the ID signal that first judges the transmitter receiving when pressure signal, and then be associated with the position of transmitter, determine the transmitter of this pressure signal from which wheel.This scheme need to be associated with the position of each wheel on vehicle transmitter No. ID, so, in the time carrying out the replacement of tire each time or rotate, just need to upgrade No. ID, a reference in receiver.But, in receiver, be wasting time and energy of a task with reference to the registration of ID signal, if thereby can automatically perform log-on operation meeting better.But, realize and automatically perform log-on operation, just need automatically to detect the namely position of associated tire of transmitter, in other words, the each transmitter automatically arranging on identification tire and the position of corresponding wheel.This undoubtedly again by problem wraparound initial point.
Known in sum, in prior art, do not have the scheme that effectively solves wheel position identification problem under the prerequisite that does not increase hardware cost and automotive servicing operation complexity.
Summary of the invention
The shortcoming of prior art in view of the above, the object of the present invention is to provide a kind of left and right wheels position automatic identifying method and system, cannot under the prerequisite that does not increase hardware cost and automotive servicing operation complexity, effectively solve the problem of wheel position identification for solving prior art.
For achieving the above object and other relevant objects, the invention provides a kind of left and right wheels position automatic identifying method, described left and right wheels position automatic identifying method comprises: two 3-axis acceleration sensors are installed on respectively on the left and right wheel of mobile device, described two 3-axis acceleration sensor mirror image symmetries, are called left 3-axis acceleration sensor and right 3-axis acceleration sensor; The first coordinate axle of described right 3-axis acceleration sensor and the long axis of body of described mobile device are the angle of 45 degree to 90 degree; The second coordinate axle of described right 3-axis acceleration sensor is parallel to right wheel tyre surface, perception acceleration due to gravity; The three axes of described right 3-axis acceleration sensor points to the axle center of right wheel, the centripetal acceleration that perception acceleration due to gravity and rotation of wheel cause; The first coordinate axle of described left 3-axis acceleration sensor and the long axis of body of described mobile device are the angle of 45 degree to 90 degree; The second coordinate axle of described left 3-axis acceleration sensor is parallel to left wheel surface of tyre, perception acceleration due to gravity; The three axes of described left 3-axis acceleration sensor points to the axle center of left wheel, the centripetal acceleration that perception acceleration due to gravity and rotation of wheel cause; In mobile device process to overtake, the second coordinate axle output of described right 3-axis acceleration sensor and left 3-axis acceleration sensor is all sinusoidal variations; In the time that the three axes output of described right 3-axis acceleration sensor reaches maximum, the second coordinate axle of described right 3-axis acceleration sensor is in zero crossing from negative to positive; In the time that the three axes output of described left 3-axis acceleration sensor reaches maximum, the second coordinate axle of described left 3-axis acceleration sensor is in zero crossing from positive to negative; Utilize the difference of described left 3-axis acceleration sensor and right 3-axis acceleration sensor second coordinate axle output characteristic in the time that three axes output reaches maximum to realize the identification to left and right wheel.Preferably, the first coordinate axle output of described right 3-axis acceleration sensor and left 3-axis acceleration sensor fluctuates near zero, and the output of the second coordinate axle is sinusoidal variations trend.
Preferably, in mobile device process to overtake, described right wheel is clockwise direction rotation, and described left wheel is anticlockwise direction rotation.
Preferably, the acceleration pick-up in the tire pressure monitoring system transmitter that described 3-axis acceleration sensor is described mobile device.
Preferably, described left and right wheels position automatic identifying method is realized by the tire pressure monitoring system transmitter of described mobile device.
The present invention also provides a kind of left and right wheels position automatic recognition system, and described left and right wheels position automatic recognition system comprises: left 3-axis acceleration sensor, is installed on the left wheel of mobile device; The first coordinate axle of described left 3-axis acceleration sensor and the long axis of body of described mobile device are the angle of 45 degree to 90 degree; The second coordinate axle of described left 3-axis acceleration sensor is parallel to left wheel surface of tyre, perception acceleration due to gravity; The three axes of described left 3-axis acceleration sensor points to the axle center of left wheel, the centripetal acceleration that perception acceleration due to gravity and rotation of wheel cause; Right 3-axis acceleration sensor, is installed on the right wheel of mobile device, with described left 3-axis acceleration sensor mirror image symmetry; The first coordinate axle of described right 3-axis acceleration sensor and the long axis of body of described mobile device are the angle of 45 degree to 90 degree; The second coordinate axle of described right 3-axis acceleration sensor is parallel to right wheel tyre surface, perception acceleration due to gravity; The three axes of described right 3-axis acceleration sensor points to the axle center of right wheel, the centripetal acceleration that perception acceleration due to gravity and rotation of wheel cause; Controller, is connected respectively with right 3-axis acceleration sensor with described left 3-axis acceleration sensor, detects the variation of each axle output of described right 3-axis acceleration sensor and left 3-axis acceleration sensor in mobile device process to overtake; In the time that the three axes output of the 3-axis acceleration sensor of receiving reaches maximum and the second coordinate axle output and is in zero crossing from negative to positive, be defined as right 3-axis acceleration sensor; In the time that the three axes output of the 3-axis acceleration sensor of receiving reaches maximum and the second coordinate axle output and is in zero crossing from positive to negative, be defined as left 3-axis acceleration sensor.
Preferably, the acceleration pick-up in the tire pressure monitoring system transmitter that described left 3-axis acceleration sensor and right 3-axis acceleration sensor are described mobile device; Described controller is the controller in the tire pressure monitoring system transmitter of described mobile device.
Preferably, described mobile device comprises that the three-wheel vehicle, the four-wheeled, five that are provided with left and right wheel take turns car, six wheeler or eight-wheeler.
As mentioned above, left and right wheels of the present invention position automatic identifying method and system, have following beneficial effect:
Acceleration pick-up has generally been used as the main sensors of waking and closing tire pressure monitoring sensor up, the present invention utilizes its positions, left and right at the left and right different identification of the characteristic wheel of exporting data while taking turns with vehicle wheel rotation, do not increase additional hardware cost, while is in the installation first of tyre pressure sensor, in replacing operation in periodic replacement and the use procedure of wheel, can reduce artificial calibration cost, improve the installation effectiveness of tire pressure monitoring sensor.
Brief description of the drawings
Fig. 1 is the schematic flow sheet of left and right wheels of the present invention position automatic identifying method.
Fig. 2 is the mounting structure schematic diagram of left and right 3-axis acceleration sensor.
Fig. 3 is the axial schematic diagram of right side wheels in rotary course.
Fig. 4 is the output schematic diagram of the accelerometer of right side wheels in rotary course.
Fig. 5 is the axial schematic diagram of left side wheel in rotary course.
Fig. 6 is the output schematic diagram of the accelerometer of left side wheel in rotary course.
Fig. 7 is a kind of specific implementation schematic flow sheet of left and right wheels of the present invention position automatic identifying method.
Fig. 8 is the structural representation of left and right wheels of the present invention position automatic recognition system.
Fig. 9 is that TPMS transmitter is realized the left and right wheels position scene schematic diagram of identification automatically.
Element numbers explanation
800 left and right wheels position automatic recognition systems
810 left 3-axis acceleration sensors
820 right 3-axis acceleration sensors
830 controllers
S11～S12, S71～S77 step
Detailed description of the invention
Below, by specific instantiation explanation embodiments of the present invention, those skilled in the art can understand other advantages of the present invention and effect easily by the disclosed content of this specification sheets.The present invention can also be implemented or be applied by other different detailed description of the invention, and the every details in this specification sheets also can be based on different viewpoints and application, carries out various modifications or change not deviating under spirit of the present invention.
Refer to accompanying drawing.It should be noted that, the diagram providing in the present embodiment only illustrates basic conception of the present invention in a schematic way, satisfy and only show with assembly relevant in the present invention in graphic but not component count, shape and size drafting while implementing according to reality, when its actual enforcement, kenel, quantity and the ratio of each assembly can be a kind of random change, and its assembly layout kenel also may be more complicated.
Below in conjunction with embodiment and accompanying drawing, the present invention is described in detail.
Embodiment
The invention provides a kind of left and right wheels position automatic identifying method, as shown in Figure 1, described left and right wheels position automatic identifying method comprises:
S11, is installed on two 3-axis acceleration sensors respectively on the left and right wheel of mobile device, and described two 3-axis acceleration sensor mirror image symmetries, are called left 3-axis acceleration sensor and right 3-axis acceleration sensor.The first coordinate axle of described right 3-axis acceleration sensor and the long axis of body of described mobile device are the angle of 45 degree to 90 degree, the first coordinate axle that is described right 3-axis acceleration sensor can be the long axis of body that forward points to mobile device, can be also the long axis of body that oppositely points to described mobile device.The second coordinate axle of described right 3-axis acceleration sensor is parallel to right wheel tyre surface, perception acceleration due to gravity.The three axes of described right 3-axis acceleration sensor points to the axle center of right wheel, the centripetal acceleration that perception acceleration due to gravity and rotation of wheel cause.The first coordinate axle of described left 3-axis acceleration sensor and the long axis of body of described mobile device are the angle of 45 degree to 90 degree, the first coordinate axle that is described left 3-axis acceleration sensor can be the long axis of body that oppositely points to mobile device, also can be the long axis of body that forward points to described mobile device, no matter forward points to or oppositely points to, all must be proximate mirror symmetry with right 3-axis acceleration sensor.The second coordinate axle of described left 3-axis acceleration sensor is parallel to left wheel surface of tyre, perception acceleration due to gravity.The three axes of described left 3-axis acceleration sensor points to the axle center of left wheel, the centripetal acceleration that perception acceleration due to gravity and rotation of wheel cause.Any one axle in the x, y, z that the first coordinate axle of the present invention can be 3-axis acceleration sensor, the first coordinate axle of described right 3-axis acceleration sensor can be any one axle in x, y, z.The first coordinate axle of described left 3-axis acceleration sensor can be any one axle in y, z, x.When actual enforcement, the x, y, z axle of left and right 3-axis acceleration sensor can become the first coordinate axle described in the present invention, the second coordinate axle, three axes by rotating arbitrarily bind lines.In mobile device process to overtake, described right wheel is clockwise direction rotation, and described left wheel is anticlockwise direction rotation.
Protection scope of the present invention is not limited to mounting means and the recognition methods of described left and right wheels, and every method of utilizing recognition principle identification left and right wheels of the present invention is all included in protection scope of the present invention.Utilize recognition principle of the present invention that the installation of left and right wheels described in the present invention and recognition methods are exchanged, can identify equally left and right wheels.
Taking automobile as example, the concrete mounting structure of left and right 3-axis acceleration sensor as shown in Figure 2, Fig. 2 is the birds-eye view of overlooking automobile, in the time that acceleration pick-up is positioned at wheel nave apical position, right y axle of taking turns accelerometer (being installed on the 3-axis acceleration sensor of right side wheels) points to headstock, z axle points to ground, and x axle meets right-hand rule.The y axle of revolver accelerometer (being installed on the 3-axis acceleration sensor of left side wheel) points to the tailstock, and z axle points to ground, and x axle meets right-hand rule.The near front wheel and left rear wheel axial and right front and right back axially identical, accelerometer is that mirror image is installed at left and right wheels.
S12, utilizes the difference of described left 3-axis acceleration sensor and right 3-axis acceleration sensor y axle output characteristic in the time that z axle output reaches maximum to realize the identification to left and right wheel.Wherein, in mobile device process to overtake, the second coordinate axle output of described right 3-axis acceleration sensor and left 3-axis acceleration sensor is all sinusoidal variations; In the time that the three axes output of described right 3-axis acceleration sensor reaches maximum, the second coordinate axle of described right 3-axis acceleration sensor is in zero crossing from negative to positive; In the time that the three axes output of described left 3-axis acceleration sensor reaches maximum, the second coordinate axle of described left 3-axis acceleration sensor is in zero crossing from positive to negative; Utilize the difference of described left 3-axis acceleration sensor and right 3-axis acceleration sensor second coordinate axle output characteristic in the time that three axes output reaches maximum to realize the identification to left and right wheel.
Taking automobile as example, the detection that utilizes acceleration pick-up to complete wheel position is that on the go is realized.Fig. 3 is in the time that automobile advances, the axial schematic diagram of right side wheels in rotary course, and wherein, right wheel is clockwise direction and rotates, and can experience respectively position 1 to position 4.Wherein, the accelerometer x axle in right wheel points to the vehicle body longitudinal axis all the time, and its output valve fluctuates near " zero "; Y axle is owing to being parallel to surface of tyre, so perception acceleration due to gravity only, its output valve is at-9.8m/s
2to 9.8m/s
2between be sinusoidal variations trend; Z axle is owing to pointing to the center (being axle center) of wheel, the centripetal acceleration that perception acceleration due to gravity and rotation of wheel cause simultaneously, and its output is also sineization.The exporting change amount of the accelerometer in right wheel as shown in Figure 4.As shown in Figure 4, it is minimum that the output of y axle reaches at 2 places, position, reaches maximum at 4 places, position, and at 3 places, position, through reached maximum by the output of z axle in bearing positive mistake " zero " point, the accelerometer output that meets this characteristic can be identified as right side wheels.
Fig. 5 is in the time that automobile advances, the axial schematic diagram of left side wheel in rotary course, and wherein, left wheel is anticlockwise direction and rotates, and can experience respectively position 1 to position 4.And the accelerometer x axle in left wheel points to the vehicle body longitudinal axis all the time, its output valve fluctuates near " zero "; Y axle is owing to being parallel to surface of tyre, so perception acceleration due to gravity only, its output valve is at-9.8m/s
2to 9.8m/s
2between be sinusoidal variations trend; Z axle is owing to pointing to the center (being axle center) of wheel, the centripetal acceleration that perception acceleration due to gravity and rotation of wheel cause simultaneously, and its output is also sineization.The exporting change amount of the accelerometer in left wheel as shown in Figure 6.As shown in Figure 6, it is minimum that the output of y axle reaches at 1 place, position, reaches maximum at 3 places, position, and at 4 places, position, through by just reaching maximum to the output of z axle in negative mistake " zero " point, the accelerometer that meets this characteristic is exported and can be identified as left side wheel.In mobile device process to overtake, the y axle output of described right 3-axis acceleration sensor and left 3-axis acceleration sensor is all sinusoidal variations; The x axle output of described right 3-axis acceleration sensor and left 3-axis acceleration sensor fluctuates near zero, and the output of y axle is sinusoidal variations trend.In the time that the z of described right 3-axis acceleration sensor axle output reaches maximum, the y axle of described right 3-axis acceleration sensor is in zero crossing from negative to positive.In the time that the z of described left 3-axis acceleration sensor axle output reaches maximum, the y axle of described left 3-axis acceleration sensor is in zero crossing from positive to negative, the difference of left and right 3-axis acceleration sensor y axle output characteristic in the time that z axle output reaches maximum that Here it is.
Fig. 7 provides the specific implementation of a kind of step S12; but the implementation procedure of step S12 of the present invention is not limited to this kind of mode that the present embodiment is enumerated, the identifying schemes of every left and right wheel of realizing according to principle of the present invention is all included in protection scope of the present invention.
The concrete execution flow process of Fig. 7 comprises:
S71, carries out Real-time Collection to the output of the 3-axis acceleration sensor in wheel.Wherein, the output of 3-axis acceleration sensor comprises x axis data, y axis data, z axis data.Gatherer process comprises the processing of the modes such as x axis data, y axis data, z axis data are sampled respectively, time window, moving average, and acquisition can compare x axis values, y axis values, the z axis values of judgement.
S72, first judges whether x axis values, y axis values, z axis values represent that mobile device remains static, if return to step S71, continues if not execution step S73.If automobile remains static, the output of the 3-axis acceleration sensor in wheel just can not change so, also with regard to None-identified left and right wheels.That is to say, recognition methods of the present invention only could realize in vehicle traveling process.
S73, judges that whether z axis values reaches peak value (maximum), if continue execution step S74, returns to step S71 if not again.
S74, continues to judge in the time that whether z axis values reaches peak value, whether y axis values is zero crossing from negative to positive, if the possibility increase that definite 3-axis acceleration sensor of this time exporting data is the acceleration pick-up in left side wheel once; Perform step if not S75.
S75, judges in the time that whether z axis values reaches peak value, and whether y axis values is zero crossing from positive to negative, if the possibility increase that definite 3-axis acceleration sensor of this time exporting data is the acceleration pick-up in right side wheels once; Return to if not step S71.
S76, in the time that the possibility of left or right side acceleration sensor reaches preset times, is identified as the acceleration pick-up data of left or right sidecar wheel.
S77, utilizes antenna transmitter that the acceleration pick-up data of determining left or right sidecar wheel are sent.
3-axis acceleration sensor of the present invention can be selected the acceleration pick-up in tire pressure monitoring system (Tire PressureMonitoring System, the be called for short TPMS) transmitter of described mobile device.That is to say, left and right wheels of the present invention position automatic identifying method can be realized by the tire pressure monitoring system transmitter of described mobile device, without increasing any hardware cost, do not need automatically to register No. ID yet, can not increase any extra work and difficulty to automotive servicing operation.
The present invention also provides a kind of left and right wheels position automatic recognition system, this system can realize left and right wheels of the present invention position automatic identifying method, but the implement device of left and right wheels of the present invention position automatic identifying method includes but not limited to left and right wheels of the present invention position automatic recognition system.
As shown in Figure 8, described left and right wheels position automatic recognition system 800 comprises: left 3-axis acceleration sensor 810, right 3-axis acceleration sensor 820, controller 830.
Described left 3-axis acceleration sensor 810 is installed on the left wheel of mobile device.The first coordinate axle of described left 3-axis acceleration sensor and the long axis of body of described mobile device are the angle of 45 degree to 90 degree; The first coordinate axle that is described left 3-axis acceleration sensor can be the long axis of body that oppositely points to mobile device, can be also the long axis of body that forward points to described mobile device.The second coordinate axle of described left 3-axis acceleration sensor is parallel to left wheel surface of tyre, perception acceleration due to gravity; The three axes of described left 3-axis acceleration sensor points to the axle center of left wheel, the centripetal acceleration that perception acceleration due to gravity and rotation of wheel cause.
Described right 3-axis acceleration sensor 820 is installed on the right wheel of mobile device, with described left 3-axis acceleration sensor 810 mirror image symmetries.The first coordinate axle of described right 3-axis acceleration sensor and the long axis of body of described mobile device are the angle of 45 degree to 90 degree; The first coordinate axle that is described right 3-axis acceleration sensor can be the long axis of body that forward points to mobile device, can be also the long axis of body that oppositely points to described mobile device.No matter forward points to or oppositely points to, right 3-axis acceleration sensor all must be proximate mirror symmetry with left 3-axis acceleration sensor.The second coordinate axle of described right 3-axis acceleration sensor is parallel to right wheel tyre surface, perception acceleration due to gravity; The three axes of described right 3-axis acceleration sensor points to the axle center of right wheel, the centripetal acceleration that perception acceleration due to gravity and rotation of wheel cause.Any one axle in the x, y, z that the first coordinate axle of the present invention can be 3-axis acceleration sensor, the first coordinate axle of described right 3-axis acceleration sensor can be any one axle in x, y, z.The first coordinate axle of described left 3-axis acceleration sensor can be any one axle in y, z, x.When actual enforcement, the x, y, z axle of left and right 3-axis acceleration sensor can become the first coordinate axle described in the present invention, the second coordinate axle, three axes by rotating arbitrarily bind lines.
Protection scope of the present invention is not limited to the mounting structure of described left and right wheels, and every mounting structure that utilizes recognition principle identification left and right wheels of the present invention is all included in protection scope of the present invention.Utilize recognition principle of the present invention that the mounting structure of left and right wheels described in the present invention is exchanged, can identify equally left and right wheels.
Described controller 830 is connected respectively with right 3-axis acceleration sensor 820 with described left 3-axis acceleration sensor 810, detects the variation of each axle output of described right 3-axis acceleration sensor and left 3-axis acceleration sensor in mobile device process to overtake; In the time that the three axes output of the 3-axis acceleration sensor of receiving reaches maximum and the second coordinate axle output and is in zero crossing from negative to positive, be defined as right 3-axis acceleration sensor; In the time that the three axes output of the 3-axis acceleration sensor of receiving reaches maximum and the second coordinate axle output and is in zero crossing from positive to negative, be defined as left 3-axis acceleration sensor.
Described left 3-axis acceleration sensor and right 3-axis acceleration sensor can be selected the acceleration pick-up in the tire pressure monitoring system transmitter of described mobile device; Described controller also can be selected the controller in the tire pressure monitoring system transmitter of described mobile device.Be that described left and right wheels position automatic recognition system 800 can be realized by existing tire pressure monitoring system (TPMS) transmitter.As shown in Figure 9, the acceleration pick-up detecting for tire location belongs to one of sensor of TPMS transmitter.TPMS transmitter sends through preliminary analysis and after processing the pressure collecting, temperature and acceleration pick-up data by controller by radio transmitters.Each TPMS transmitter is arranged on wheel by cranked tire valve.The acceleration pick-up that is generally used for tire pressure monitoring is used for making system wake-up and closes, thereby reduces the power consumption of system, increases the service life.Here further process by controller degree of the will speed up meter signal in TPMS transmitter, just can obtain left and right wheel location information.The testing result of tire location is received after via controller is processed and is shown to user with the form of man machine interface by the wireless receiver in TPMS receptor.Host module is generally arranged in operator's compartment, mainly completes the analysis to tire pressure data, processing and demonstration, sound and light alarm and set-up function.
Mobile device described in the present invention comprises that the three-wheel vehicle, the four-wheeled, five that are provided with left and right wheel take turns car, six wheeler, eight-wheeler etc.No matter be several cars of taking turns, as long as it possesses left and right wheels, just can adopt scheme of the present invention to identify.
The object of the invention is effectively to solve the problem of wheel position identification under the prerequisite that does not increase hardware cost and automotive servicing operation complexity, it utilizes a kind of acceleration pick-up cheaply automatically to identify the position of the left and right wheels at TPMS transmitter place, can reduce artificial nominal time and human cost to tire pressure monitoring system when tire pressure monitoring system is installed and wheel changes.
Acceleration pick-up has generally been used as the main sensors of waking and closing tire pressure monitoring sensor up, and the present invention utilizes its positions, left and right at the left and right different identification of the characteristic wheel of exporting data while taking turns with vehicle wheel rotation, does not increase additional hardware cost.In the installation first of tyre pressure sensor, in the replacing operation in periodic replacement and the use procedure of wheel, can reduce artificial calibration cost simultaneously, improve the installation effectiveness of tire pressure monitoring sensor.
In sum, the present invention has effectively overcome various shortcoming of the prior art and tool high industrial utilization.
Above-described embodiment is illustrative principle of the present invention and effect thereof only, but not for limiting the present invention.Any person skilled in the art scholar all can, under spirit of the present invention and category, modify or change above-described embodiment.Therefore, such as in affiliated technical field, have and conventionally know that the knowledgeable, not departing from all equivalence modifications that complete under disclosed spirit and technological thought or changing, must be contained by claim of the present invention.
Claims (8)
1. a left and right wheels position automatic identifying method, is characterized in that, described left and right wheels position automatic identifying method comprises:
Two 3-axis acceleration sensors are installed on respectively on the left and right wheel of mobile device, described two 3-axis acceleration sensor mirror image symmetries, are called left 3-axis acceleration sensor and right 3-axis acceleration sensor;
The first coordinate axle of described right 3-axis acceleration sensor and the long axis of body of described mobile device are the angle of 45 degree to 90 degree; The second coordinate axle of described right 3-axis acceleration sensor is parallel to right wheel tyre surface, perception acceleration due to gravity; The three axes of described right 3-axis acceleration sensor points to the axle center of right wheel, the centripetal acceleration that perception acceleration due to gravity and rotation of wheel cause;
The first coordinate axle of described left 3-axis acceleration sensor and the long axis of body of described mobile device are the angle of 45 degree to 90 degree; The second coordinate axle of described left 3-axis acceleration sensor is parallel to left wheel surface of tyre, perception acceleration due to gravity; The three axes of described left 3-axis acceleration sensor points to the axle center of left wheel, the centripetal acceleration that perception acceleration due to gravity and rotation of wheel cause;
In mobile device process to overtake, the second coordinate axle output of described right 3-axis acceleration sensor and left 3-axis acceleration sensor is all sinusoidal variations; In the time that the three axes output of described right 3-axis acceleration sensor reaches maximum, the second coordinate axle of described right 3-axis acceleration sensor is in zero crossing from negative to positive; In the time that the three axes output of described left 3-axis acceleration sensor reaches maximum, the second coordinate axle of described left 3-axis acceleration sensor is in zero crossing from positive to negative; Utilize the difference of described left 3-axis acceleration sensor and right 3-axis acceleration sensor second coordinate axle output characteristic in the time that three axes output reaches maximum to realize the identification to left and right wheel.
2. left and right wheels according to claim 1 position automatic identifying method, it is characterized in that: the first coordinate axle output of described right 3-axis acceleration sensor and left 3-axis acceleration sensor fluctuates near zero, and the output of the second coordinate axle is sinusoidal variations trend.
3. left and right wheels according to claim 1 position automatic identifying method, is characterized in that: in mobile device process to overtake, described right wheel is clockwise direction rotation, and described left wheel is anticlockwise direction rotation.
4. left and right wheels according to claim 1 position automatic identifying method, is characterized in that: the acceleration pick-up in the tire pressure monitoring system transmitter that described 3-axis acceleration sensor is described mobile device.
5. left and right wheels according to claim 1 position automatic identifying method, is characterized in that: described left and right wheels position automatic identifying method is realized by the tire pressure monitoring system transmitter of described mobile device.
6. a left and right wheels position automatic recognition system, is characterized in that, described left and right wheels position automatic recognition system comprises:
Left 3-axis acceleration sensor, is installed on the left wheel of mobile device; The first coordinate axle of described left 3-axis acceleration sensor and the long axis of body of described mobile device are the angle of 45 degree to 90 degree; The second coordinate axle of described left 3-axis acceleration sensor is parallel to left wheel surface of tyre, perception acceleration due to gravity; The three axes of described left 3-axis acceleration sensor points to the axle center of left wheel, the centripetal acceleration that perception acceleration due to gravity and rotation of wheel cause;
Right 3-axis acceleration sensor, is installed on the right wheel of mobile device, with described left 3-axis acceleration sensor mirror image symmetry; The first coordinate axle of described right 3-axis acceleration sensor and the long axis of body of described mobile device are the angle of 45 degree to 90 degree; The second coordinate axle of described right 3-axis acceleration sensor is parallel to right wheel tyre surface, perception acceleration due to gravity; The three axes of described right 3-axis acceleration sensor points to the axle center of right wheel, the centripetal acceleration that perception acceleration due to gravity and rotation of wheel cause;
Controller, is connected respectively with right 3-axis acceleration sensor with described left 3-axis acceleration sensor, detects the variation of each axle output of described right 3-axis acceleration sensor and left 3-axis acceleration sensor in mobile device process to overtake; In the time that the three axes output of the 3-axis acceleration sensor of receiving reaches maximum and the second coordinate axle output and is in zero crossing from negative to positive, be defined as right 3-axis acceleration sensor; In the time that the three axes output of the 3-axis acceleration sensor of receiving reaches maximum and the second coordinate axle output and is in zero crossing from positive to negative, be defined as left 3-axis acceleration sensor.
7. left and right wheels according to claim 6 position automatic recognition system, is characterized in that: the acceleration pick-up in the tire pressure monitoring system transmitter that described left 3-axis acceleration sensor and right 3-axis acceleration sensor are described mobile device; Described controller is the controller in the tire pressure monitoring system transmitter of described mobile device.
8. according to the left and right wheels position automatic recognition system described in claim 6 or 7, it is characterized in that: described mobile device comprises that the three-wheel vehicle, the four-wheeled, five that are provided with left and right wheel take turns car, six wheeler or eight-wheeler.
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| CN201410314615.1A CN104057790A (en) | 2014-07-03 | 2014-07-03 | Method and system for automatically recognizing positions of left wheel and right wheel |
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| CN201410314615.1A CN104057790A (en) | 2014-07-03 | 2014-07-03 | Method and system for automatically recognizing positions of left wheel and right wheel |
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| CN201410314615.1A Pending CN104057790A (en) | 2014-07-03 | 2014-07-03 | Method and system for automatically recognizing positions of left wheel and right wheel |
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Application publication date: 20140924 |