CN102180070A - Latch-evaluation circuit for electromechanical transducer of a tire - Google Patents
Latch-evaluation circuit for electromechanical transducer of a tire Download PDFInfo
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- CN102180070A CN102180070A CN2010106250248A CN201010625024A CN102180070A CN 102180070 A CN102180070 A CN 102180070A CN 2010106250248 A CN2010106250248 A CN 2010106250248A CN 201010625024 A CN201010625024 A CN 201010625024A CN 102180070 A CN102180070 A CN 102180070A
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- tire
- sensor signal
- signal
- electromechanical transducer
- trace
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M17/00—Testing of vehicles
- G01M17/007—Wheeled or endless-tracked vehicles
- G01M17/02—Tyres
-
- 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
- B60C23/06—Signalling devices actuated by deformation of the tyre, e.g. tyre mounted deformation sensors or indirect determination of tyre deformation based on wheel speed, wheel-centre to ground distance or inclination of wheel axle
- B60C23/064—Signalling devices actuated by deformation of the tyre, e.g. tyre mounted deformation sensors or indirect determination of tyre deformation based on wheel speed, wheel-centre to ground distance or inclination of wheel axle comprising tyre mounted deformation sensors, e.g. to determine road contact area
Abstract
The circuit (100) has a sensitivity adjusting mechanism (108) adjusting input sensitivity of the circuit based on strength of a time-dependent electrical sensor signal of an electromechanical converter (102) such that the full sensor signal is evaluated with adjusted input sensitivity. An evaluation device (110) generates an evaluation signal with the adjusted input sensitivity based on the provided sensor signal, where the evaluation signal indicates tread shuffle process of a tire (104). Independent claims are also included for the following: (1) a device for determining tread shuffle of a tire comprising an evaluation circuit (2) a method for evaluating a sensor signal of an electromechanical converter of the tire (3) a computer-readable storage medium comprising a set of instructions to perform a method for evaluating the sensor signal of the electromechanical converter (4) a program element for evaluating the sensor signal of the electromechanical converter.
Description
Technical field
The present invention relates to the analysis circuit of a kind of sensor signal of the electromechanical transducer that is used to analyze tire in the hope of the trace (Latsch) of tire.
In addition, the invention still further relates to a kind of device that is used to try to achieve the trace of tire.
The invention still further relates to a kind of vehicle.
The invention still further relates to the method for a kind of sensor signal of the electromechanical transducer that is used to analyze tire in the hope of the trace of tire.
In addition, the invention still further relates to a kind of program element.
In addition, the invention still further relates to a kind of computer-readable storage medium.
Background technology
Modern self-propelled vehicle has formed complicated hardware and software system.In order to regulate the automotive system electrical integrated, used the great controller of a large amount of difference with controlling machine.The tire system of intelligence also is incorporated into the in service of self-propelled vehicle with the trace of tire.
The trace of tire is represented the tire areal of support, the parameter of the tire of expression indication in other words areal of support.Such parameter is the length of trace particularly, and just along the travel direction length measured, tire is placed on the road along this length.In motion, the tire areal of support of car usually approximately has only size as the palm.Then also little for motor bike.If tire air pressure is too high, the tire areal of support just becomes smaller so.Like this, tire only weares and teares in the centre, and can only transmit less power to the road surface.If air pressure is too low, tire only rolls with exterior tire shoulder so, and only wearing and tearing outside equally also can only be transmitted less power, and in addition, this also will cause the tire heating, and blasts under extreme case or decompose.
Therefore, on conventional truck, can cause damaged tyres because of defective tire print.
Summary of the invention
Task of the present invention is, a kind of system that can accurately try to achieve tire print is provided.
This task is solved by the theme of independent claims.Favourable embodiment of the present invention is described in the dependent claims.
According to a first aspect of the present invention, a kind of analysis circuit is proposed, the sensor signal that is used to analyze the electromechanical transducer (for example piezoelectric element) of tire is tried to achieve the tire areal of support on the bearing in other words in the hope of the trace (the particularly parameter of trace length or other indication trace) of tire, wherein, described analysis circuit has the sensor signal input end, sensor signal (such as voltage) described electromechanical transducer and electricity time correlation can be provided on this sensor signal input end, described sensor signal can owing to described electromechanical transducer (this electromechanical transducer can be placed on the tire or in the tire) the trace of tire by process (just sometime at interval in, in this time gap, the section that is mounted with described electromechanical transducer of the tire of rolling with the basis contact) in bending and produce.In addition, described analysis circuit also comprises switch-operated response control, this switch-operated response control is used for intensity (for example amplitude amplitude peak) in other words based on described sensor signal and regulates the input sensitivity of described analysis circuit (for example input voltage range that can be handled error-free by analysis circuit), thereby can analyze complete sensors signal (just in its whole strength range) such as in whole signal level range with the input sensitivity of being regulated.Described analysis circuit also has analytical equipment, and this analytical equipment is used for producing based on the sensor signal that provides the analytic signal of indication tire print under the input sensitivity of being regulated.
According to an alternative embodiment of the invention, a kind of device that is used to try to achieve tire print is proposed, wherein, this device has electromechanical transducer (for example piezoelectric element), and this electromechanical transducer can be arranged on the tire and be used at the trace of tire by process because the bending of described electromechanical transducer produces the sensor signal with the electricity of time correlation.In addition, this device also comprises the analysis circuit with aforementioned feature, and described analysis circuit is used to analyze the sensor signal of electromechanical transducer of described tire in the hope of the trace of tire.
According to an alternative embodiment of the invention, provide a kind of vehicle that has analysis circuit or have the device of aforementioned feature (as self-propelled vehicle, particularly car or lorry or motor bike) with aforementioned feature.
● according to an alternative embodiment of the invention, provide the method for a kind of sensor signal of the electromechanical transducer that is used to analyze tire in the hope of the trace of tire.In the method, receive sensor signal described electromechanical transducer and electricity time correlation, described sensor signal produces by the bending in the process at the trace of tire owing to described electromechanical transducer.In addition, based on the described input sensitivity that is used for the analysis circuit of analyte sensors signal of the intensity adjustments of described sensor signal, the feasible input sensitivity of being regulated of using can be in the described sensor signal of whole strength range inner analysis of described sensor signal.In addition, under the input sensitivity of being regulated, produce analytic signal, make this analytic signal indicate the trace of described tire based on the sensor signal that is received.
According to embodiments of the invention, in computer-readable storage medium, preserve the program of the sensor signal of the electromechanical transducer be used to analyze tire in the hope of the trace of tire, when treater moved this program, the method with aforementioned feature is carried out or controlled to this program.
According to embodiments of the invention, the sensor signal that is used to analyze the electromechanical transducer of tire has aforesaid method step (controlling or carry out these method steps in other words) in the hope of the program element (computer program element) of the trace of tire, if carry out described program element.
Embodiments of the invention not only can be by means of computer program software realization just, also can by means of the circuit of the electricity of one or more special uses just hardware realize that perhaps the forms of mixing arbitrarily with both just realize by means of component software and nextport hardware component NextPort.
According to exemplary embodiment of the present invention, consider that the sensor signal of electromechanical transducer may experience than this fact of great fluctuation process.For this purpose, the analysis of sensor signal being carried out inerrancy and not having a pseudo-shadow (artifaktfrei) by analysis circuit can be guaranteed in the following way, be that analysis circuit can be based on the intensity of sensor signal or amplitude such as feedback ground its input sensitivity of automatic compensation, thereby the analytical equipment that guarantees to be connected the back can both realize that in whole signal amplitude scope analysis to signal is to be used for determining the length of tire print.
Further the exemplary embodiment of analysis circuit is described below.These embodiment also are applicable to above-mentioned device, vehicle, method, program element and computer-readable storage medium.
According to embodiments of the invention, described switch-operated response control has variable amplifier, and sensor signal can be transfused in the described amplifier.The coefficient of amplification of the amplifier that this is variable can change by means of control signal, and described control signal can be based on the output signal of described variable amplifier.In other words, can realize backfeed loop, this backfeed loop is dynamically adjusted described variable amplifier or rheostatic corresponding coefficient of amplification, thereby the present signal strength of described sensor signal is taken into account.
Still with reference to previous embodiment, described analytic unit also can have microcontroller or other treater, and the output signal of described variable amplifier can be imported in described microcontroller or the other treater.Based on this output signal, described microcontroller can produce analytic signal.Based on this output signal, described microcontroller can produce control signal and import described variable amplifier.Therefore, described microcontroller not only can be used for producing the control signal that variable amplifier is adjusted again, and can carry out preoperative treatment to the sensor signal that is in the accessible amplitude range, to determine to characterize the value of current tire print.
In addition, described microcontroller also can produce analytic signal based on described output signal, and making that described analytic signal is no more than can predefined lower threshold value, and be no more than can predefined upper threshold value.Described lower threshold value can so be selected, and analyzes thereby avoid making signal analyzedly maybe can only not have high signal to noise ratio ground because of signal is too weak.Signal remained on guaranteed below the upper threshold value and needn't handle the signal outside the accessible scope that is in amplitude.
Described switch-operated response control can have sampling holding element (" sample and hold " Glied).This sampling holding element can be used for preserving sensor signal intensity and can be based on this electric capacity in parallel variable in described electromechanical transducer, but so that import the intensity respective change of the sensor signal of described analytical equipment.In other words, described sampling holding element can be preserved the maximum amplitude of sensor signal and can increase aspect capacitance thus or the electric capacity of scale-down adjustable.By giving described electromechanical transducer in parallel variable electric capacity, can realize the damping adjustment of time constant in other words, thereby, can be described analytical equipment the signal that can be handled by described analytical equipment is provided.
Described analytical equipment can have comparator, and the function block of mouth just the comparative result of two signals that provide on two input ends can be provided.Connect distance between the zero crossing that this comparator can accompany based on two priorities of the sensor signal of the electricity of described and time correlation and try to achieve the length of the trace of described tire.For piezoelectric element as the preferred examples of described electromechanical transducer, can be at trace by surveying signal, especially electric charge or the voltage signal with time correlation, two yardsticks that zero crossing is a trace length of this signal in the process.For this reason, can consider the current speed of tire in order to carry out described analysis.Because the characteristic of piezoelectric element advantageously, is input to signal in the comparator, obtain having a kind of signal of pulse type of pulse length with this, and this pulse length yardstick of trace length just.
Described analysis circuit also can have time constant and change the unit, and this time constant changes the unit can be in parallel with described electromechanical transducer for the time constant that changes described electromechanical transducer.This time constant changes the circuit that the unit can be made up of electric capacity and ohmage, thus because this parallel line can prolong or shorten the distinctive time constant of the sensor signal of piezoelectric element.Especially may not require to prolong this time constant for signal being offered with having pseudo-shadow comparator.
Further described Design of device scheme is described below.These design plans are applicable to described analysis circuit, vehicle, method, program element and computer-readable storage medium too.
According to a kind of embodiment, this device can be designed to tire module.In other words, the two can be arranged to the assembly of described analysis circuit and described electromechanical transducer on the tire or in the tire, exports tire print length as output signal or at the following output of the situation of known trace width areal of indentation with this unit as the compact module class.
Scheme as an alternative also can be such as only installing described electromechanical transducer in described tire, and the part that the remaining component of described analysis circuit then can be used as the vehicle electric module realizes.Then, for control or other similar purpose, vehicle electronics also can use described trace length, and this is all significant to the safe operation of self-propelled vehicle and consumption of fuel minimizes and power from the driving engine to the road is transmitted maximization.
Further the additional design of vehicle is described below.These design plans are equally applicable to described analysis circuit, device, method, program element and computer-readable storage medium.
Vehicle is such as being a kind of automobile (for example self-propelled vehicle, especially car or lorry).But also can be applied in train, bicycle or the similar vehicles by control system of the present invention.
It may be noted that embodiments of the present invention are to illustrate with reference to different subject matters.Especially, some embodiments of the present invention are described with the device claim, and other embodiment of the present invention is then described with claim to a method.Yet, for a person skilled in the art, when reading the application, can understand immediately, short ofly offer some clarification in addition, except the combination of features that belongs to a kind of subject matter, also can combination in any belong to the feature of different types of subject matter.
Description of drawings
Other advantage of the present invention and feature can be from following to drawing the present exemplary description preferred embodiment.Each accompanying drawing in the application's drawing all only should be regarded schematically and not proportionally chi as.
Fig. 1 shows the device of trace that is used to try to achieve tire according to one exemplary embodiment of the present invention.
Fig. 2 illustrates as the piezoelectric element of electromechanical transducer at tire print by the bending in the process.
Fig. 3 shows the chart of relation of the corner of expression bending of piezoelectric element and tire.
Fig. 4 illustrates the piezoelectric element as the embodiment of electromechanical transducer.
Fig. 5 shows the chart of relation of the corner of expression electric charge that piezoelectric element produced and tire.
Fig. 6 is expression comparator output and the incoming signal chart as the sensor signal of electromechanical transducer.
Fig. 7 shows the device of trace that is used to try to achieve tire according to one exemplary embodiment of the present invention.
Fig. 8 shows the device of trace that is used to try to achieve tire according to another one exemplary embodiment of the present invention.
Fig. 9 shows chart, and this chart illustrates the influence of regulating according to the sensitivity of the analysis circuit of one exemplary embodiment, and described analysis circuit is used to analyze the sensor signal of electromechanical transducer of tire in the hope of the trace of tire.
Same or analogous assembly has identical Reference numeral in different accompanying drawings.
The specific embodiment
Fig. 1 shows the device 150 according to one exemplary embodiment of the present invention, and this device is used to try to achieve the parameter of the sign trace of tire 104, is used to try to achieve trace length 1 or rather.
Described device 150 comprises electromechanical transducer 102, this electromechanical transducer is positioned on the tire 104, and be used for trace at tire 104 by process (seeing arrow 120, perhaps the interval between the position 2 and 4 among Fig. 2) in according to the sensor signal of the electricity of the bending generation of described electromechanical transducer 102 and time correlation.In addition, described device 150 also comprises the analysis circuit 100 of the sensor signal of the electromechanical transducer 102 that is used to analyze tire 104 in the hope of the trace of tire 104.
When described tire 104 when direction shown in 120 is rotated, as long as electromechanical transducer 102 and road 122 adjacency as tire 104 bases, so described electromechanical transducer 102 for example piezoelectric element just bends in this rotation process.The bending of described electromechanical transducer 102 can cause producing the sensor signal of electricity, and this electric sensor signal offers analysis circuit 100 on sensor signal input end 106.With this, the sensor signal with electricity time correlation described electromechanical transducer 102 is offered sensor signal input end 106, described sensor signal produces by the bending in the process at the trace of tire 104 owing to described electromechanical transducer 102.The sensor signal of the electricity of this and time correlation is input in the switch-operated response control 108 of analysis circuit 100.Described switch-operated response control 108 be used for such as based on feedback signal 180 and based on the intensity of sensor signal for example amplitude so regulate the input sensitivity of described analysis circuit 100, thereby use the input sensitivity of being regulated can be fully in the whole intensity or the described sensor signal of signal level inner analysis of described sensor signal.Therefore, although sensor signal aspect the maximum amplitude because the just external action during measurement and acute variation can take place at the trace that uses tire 104, but described switch-operated response control 108 can be regulated the sensitivity of analysis circuit 100 neatly, thereby, the analysis of the sensor signal that can in the whole amplitude range of described sensor signal, be provided for analytical equipment 110 realizations that are connected the back.Described analytical equipment 110 can carry out faultless analysis to sensor signal in the processing of setting at interval.Thus, by means of being connected fwd switch-operated response control 108, even can guarantee when the intensity acute variation of sensor signal, also so to adapt to described sensor signal, make described analytical equipment 110 can correctly analyze described signal by means of described switch-operated response control 108.Therefore, analytical equipment 110 is used for producing analytic signal based on the sensor signal that is provided under the input sensitivity of being regulated, and this analytic signal characterizes or indicate the trace of tire 104.
Connected output unit 112 in described analytical equipment 110 back, the result that these output unit 112 outputs are analyzed, the just length 1 of trace.Described output for example can pass to unshowned vehicle electronics in Fig. 1, and this vehicle electronics can be adjusted the control of vehicle based on measured trace.Also the trace value such as non-optimum can be informed the user, the user can take corresponding precautionary measures based on this, thereby trace is adjusted to desired value.
Preferable configuration is that the electromechanical transducer 102 of piezoelectric element can be disposed in the tire module, and is used to measure trace length in this case.Here, piezoelectric element will bend by the shape of tire 104.The bending of tire 104 can pass to piezoelectric element in from 0% to 100% ground (by machine design) at this.
Fig. 2 shows the electromechanical transducer 102 of piezoelectric element form once more, and this piezoelectric element is integrated in the tire 104.By in the process, at first 1 transformation that begins to experience by 1 to 2 from the position of described piezoelectric element is experienced then by 2 to 3 transformation at trace, experience then by 3 to 4 transformation, and last experience is by 4 to 1 transformation.In state 1, piezoelectric element has constant bending, thereby corresponding charge or voltage signal do not rise.When changing by 1 to 2, carry out the transition to aggressive bend by slight bending, this causes the positive rising of sensor signal.When changing by 2 to 3, carry out the transition to by aggressive bend and to unload destressing, this is corresponding to the negative rising of sensor signal.When changing by 3 to 4, by shedding transition of stress to aggressive bend, this causes the positive rising of sensor signal.When changing by 4 to 1, carry out the transition to slight bending by aggressive bend, this causes the negative rising of sensor signal.
Fig. 3 shows chart 300, and it has abscissa 302, has drawn the corner α of tire 104 along described abscissa 302, along ordinate 304 bending that is produced of piezoelectric element as can be seen.Fig. 3 also shows the point 1,2,3,4 by Fig. 2.
Fig. 4 shows how piezoelectric element is used for electromechanical transducer 102 as embodiment.On carrier material 400, can deposit a layer of piezo-electric material 402, wherein, in Fig. 4, also can find out the neutral phase (neutrale Phase) 404 of electromechanical transducer 102.In case neutrality phase 404 is asymmetric in piezoelectric element, just will cause the length variations of described element by the bending of piezoelectric element.Carrier material 400 can directly apply piezoelectric 402 such as being metal (as brass) or suitable wiring board on them.If the length of piezoelectric 402 changes (variation by bending causes), then separation of charge will take place.
The result who draws thus is shown in Figure 5, can see chart 500 in Fig. 5, and this chart has abscissa 502, shows the corner α of tire 104 along described abscissa.Draw the electric charge in the piezoelectric along the ordinate 504 of chart 500, drawn the electric charge in the defined state 1,2,3,4 in Fig. 2 or rather.
By the electric capacity (electric capacity of parallel connection outside in other words) of piezoelectric, can try to achieve voltage from electric charge according to relational expression U=Q/C.
When piezoelectric element bends, trace length 1 between two trace enter or the zero crossing of trace when withdrawing from (referring to Fig. 3 and Fig. 5) between.
By means of alternative route, can realize actual trace measurement of length.In this case, piezoelectric element and the parts (as cond or resistance) that are attached thereto even the size of time constant piezoelectric voltage also can significantly not reduced when trace is low by the process medium velocity, and can not distort measurement signal thus.For this reason, be the preferred condenser in parallel of piezoelectric element and (such as high ohm) ohmage.
Fig. 6 shows chart 600, and this chart has abscissa 602, has drawn the time along this abscissa.Can find out signal amplitude along 604 on ordinate.The signal that is labeled as " input " in Fig. 6 is corresponding to the incoming signal on the comparator, and the signal that is labeled as " output " on the contrary in Fig. 6 is then corresponding to the signal on the comparator output terminal.Fig. 6 shows the deviation of the output signal and the incoming signal of the simple alternative route that has piezoelectric element.According to outside actual conditions (tyre type, temperature, with being connected of tire or the like), big ups and downs may take place in the amplitude of piezoelectric element, and therefore, the input voltage range of comparator can not all guarantee flawless function in all cases.For addressing this problem, advantageously provide a kind of can be automatically and the circuit that is complementary of actual conditions (the particularly amplitude of piezoelectric element).
Can advantageously use a kind of like this circuit, its amplitude with its input sensitivity and piezoelectric signal is complementary.Thus, can find out that the design of embodiments of the invention is, automatically coupling (" auto range (automatic range) ") piezoelectric signal is to realize wide as far as possible envelop of function.
Fig. 7 shows the analysis circuit 700 according to embodiments of the invention.
According to Fig. 7, described electromechanical transducer 102 at first provides sensor signal for variable amplifier 702, wherein, the coefficient of amplification of described amplifier 702 can change by means of control signal, and described control signal is based on the output signal of described variable amplifier 702.Described variable amplifier 702 offers microcontroller 704 with described output signal, and this microcontroller 704 produces analytic signal based on this output signal and produces control signal and import described amplifier 702 by means of backfeed loop 706 based on this output signal.That provide and signal that be transferred to microcontroller 704 is an analog signal at the mouth of comparator 702.By backfeed loop 706 the control signal coefficient of amplification is transferred to amplifier 702.
The sensor signal that is configured to the electromechanical transducer 102 of piezoelectric element is so adjusted by variable amplifier 702 (rheostat) thus, that is, make it to be handled by microcontroller 704.Microcontroller 704 is regulated the coefficient of amplification of sensor signal, so that amplitude is both not too big also not too little.
Fig. 8 shows the analysis circuit 800 according to another one exemplary embodiment of the present invention.
According to Fig. 8, be provided with sampling holding element 802, this sampling holding element is used to preserve the maximum amplitude of sensor signal and gives electromechanical transducer 102 parallel connections variable electric capacity 804 based on this.This so carries out, and the feasible input analytical equipment intensity of the sensor signal of comparator 806 in other words can correspondingly change.Therefore, Fig. 8 has provided another kind of possibility, that is, make by the amplitude as the piezoelectric signal that piezoelectric element produced of electromechanical transducer 102 and can mate automatically.The amplitude peak of sensor signal can be stored in the sampling holding element 802 (" sample and hold " Glied).Just can (be that is to say, more or less) be parallel on the piezoelectric element 102 changeably with the described electric capacity 804 of this voltage.
Fig. 9 shows chart 900, and this chart illustrates the advantageous effects of the embodiment of the invention.Described chart 900 comprises abscissa 902, has drawn time signal along described abscissa.Along ordinate 904 amplitude of signal as can be seen.Chart 900 shows incoming signal and the output signal that level is adjusted circuit.
Described incoming signal is bigger at first in the short period of time.Output signal is incredible, and comparator does not then controllably switch.Subsequently, incoming signal obtains buffering.Approximately from the 4th time by, work the output signal zero defect.
The embodiment that it may be noted that here to be set forth only is the limited selection of the possible embodiment of the present invention.Therefore, can be with the feature of each embodiment with the suitable manner combination with one another so that the embodiment that those skilled in the art can be by detailed description here will a large amount of different embodiments to be considered as be clear and definite disclosed embodiment.
Claims (13)
1. the sensor signal of electromechanical transducer (102) that is used to analyze tire (104) is in the hope of the analysis circuit (100) of the trace of described tire (104), and wherein, described analysis circuit (100) has:
● sensor signal input end (106), the sensor signal of described electromechanical transducer (102) with the electricity of time correlation can be provided on described sensor signal input end, and described sensor signal can produce by the bending in the process owing to the trace of described electromechanical transducer (102) at described tire (104);
● switch-operated response control (108), this switch-operated response control is used for regulating based on the intensity of described sensor signal the input sensitivity of described analysis circuit (100), thus the input sensitivity that can enoughly regulate is analyzed the complete sensors signal;
● analytical equipment (110), this analytical equipment are used for producing based on the sensor signal that is provided the analytic signal of the trace of the described tire of indication (104) under the input sensitivity of being regulated.
2. according to the analysis circuit (700) of claim 1, wherein, described switch-operated response control (108) has variable amplifier (702), can import described sensor signal to described amplifier (702), and the coefficient of amplification of described amplifier (702) can change by control signal, and described control signal is based on the output signal of described variable amplifier (702).
3. according to the analysis circuit (700) of claim 2, wherein, described analytical equipment (110) has microcontroller (704), the output signal of described variable amplifier (702) can be imported described microcontroller (704), and described microcontroller (704) produces analytic signal based on described output signal and produces described control signal and import described amplifier (702) based on described output signal.
4. according to the analysis circuit (700) of claim 3, wherein, described microcontroller (704) produces described analytic signal based on described output signal, thereby be not less than can predefined lower threshold value and be no more than can predefined upper threshold value for described analytic signal.
5. according to the analysis circuit (800) of claim 1, wherein, described switch-operated response control (108) has sampling holding element (802), described sampling holding element is used to preserve the intensity of described sensor signal and gives described electromechanical transducer (102) in parallel variable electric capacity (804) based on this, makes the intensity that is input to the sensor signal in the described analytical equipment (110) correspondingly to change.
6. according to each analysis circuit (800) in the claim 1 to 5, wherein, described analytical equipment (110) has comparator (806), connect described comparator be used for based on and two zero crossings that successively accompany each other of the sensor signal of the electricity of time correlation between distance try to achieve the length of the trace of described tire (104).
7. according to each analysis circuit (800) in the claim 1 to 6, have time constant and change unit (804), this time constant changes unit can be with described electromechanical transducer (102) thereby the time constant that changes described electromechanical transducer (102) in parallel.
8. be used to try to achieve the device (150) of the trace of tire (104), wherein, described device (150) has:
● electromechanical transducer (102), this electromechanical transducer can be installed in described tire (104) and go up and be used at the trace of described tire (104) by process owing to the bending of described electromechanical transducer (102) produces sensor signal with the electricity of time correlation;
● according to each analysis circuit (100) in the claim 1 to 7, the sensor signal of electromechanical transducer (102) that is used to analyze described tire (104) is in the hope of the trace of described tire (104).
9. according to the device (150) of claim 8, this device is designed to tire module or vehicle electric module.
10. vehicle, have according in the claim 1 to 7 each analysis circuit (100) or according to each device (150) in claim 8 or 9.
11. the sensor signal of electromechanical transducer (102) that is used to analyze tire (104) is in the hope of the method for the trace of described tire (104), wherein, described method has following steps:
● receive the described electromechanical transducer sensor signals with electricity time correlation (102), described sensor signal since described electromechanical transducer (102) produce by the bending in the process at the trace of described tire (104);
● be used to analyze the input sensitivity of the analysis circuit (100) of described sensor signal based on the intensity adjustments of described sensor signal, thereby can analyze the complete sensors signal with the input sensitivity of being regulated;
● under the input sensitivity of being regulated, produce analytic signal, make described analytic signal indicate the trace of described tire (104) based on the sensor signal that is received.
12. computer-readable storage medium, preserve the program of the sensor signal of the electromechanical transducer (102) that is used to analyze tire (104) in the hope of the trace of described tire (104) in this storage medium, this program is used to carry out or control the method according to claim 11.
13. the sensor signal of electromechanical transducer (102) that is used to analyze tire (104) is in the hope of the program element of the trace of described tire (104), when described program element was carried out by treater, described program element was used to carry out or control the method according to claim 11.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102009057580.4A DE102009057580B4 (en) | 2009-12-09 | 2009-12-09 | Contact patch evaluation circuit for an electromechanical converter of a tire |
| DE102009057580.4 | 2009-12-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102180070A true CN102180070A (en) | 2011-09-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010106250248A Pending CN102180070A (en) | 2009-12-09 | 2010-12-09 | Latch-evaluation circuit for electromechanical transducer of a tire |
Country Status (3)
| Country | Link |
|---|---|
| KR (1) | KR20110065414A (en) |
| CN (1) | CN102180070A (en) |
| DE (1) | DE102009057580B4 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110346151A (en) * | 2018-04-03 | 2019-10-18 | 通用汽车环球科技运作有限责任公司 | Quantify tread rib marginal position |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102014226783B4 (en) | 2014-12-22 | 2020-01-02 | Continental Automotive Gmbh | System and method for determining at least one tire tire parameter characterizing a dimension of a tire patch on a tire of a wheel of a vehicle |
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| US20070213953A1 (en) * | 2004-11-19 | 2007-09-13 | The Yokohama Rubber Co., Ltd. | Tire Deformation Calculating Method And Tire Deformation Calculating Apparatus |
| US20080012718A1 (en) * | 2006-06-29 | 2008-01-17 | Fujitsu Limited | Amplifier and control method thereof |
| WO2009027423A1 (en) * | 2007-08-31 | 2009-03-05 | Continental Teves Ag & Co. Ohg | Tire module having piezosensitive sensor |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5749984A (en) | 1995-12-29 | 1998-05-12 | Michelin Recherche Et Technique S.A. | Tire monitoring system and method |
| DE19818124C2 (en) | 1998-04-23 | 2001-09-13 | Daimler Chrysler Ag | Device for detecting the speed of turbochargers |
| US20030058118A1 (en) | 2001-05-15 | 2003-03-27 | Wilson Kitchener C. | Vehicle and vehicle tire monitoring system, apparatus and method |
| DE10325422A1 (en) | 2003-06-05 | 2004-12-23 | Continental Aktiengesellschaft | Periodic electrical signal amplitude determination procedure for car tire side wall deformation sensors uses integration between null crossings found by trigger |
| JP4472363B2 (en) | 2004-01-20 | 2010-06-02 | 株式会社ブリヂストン | Tire condition estimation method |
| JP4680532B2 (en) | 2004-06-02 | 2011-05-11 | 株式会社ブリヂストン | Method and apparatus for estimating dynamic state of tire |
-
2009
- 2009-12-09 DE DE102009057580.4A patent/DE102009057580B4/en active Active
-
2010
- 2010-12-09 KR KR1020100125668A patent/KR20110065414A/en not_active Application Discontinuation
- 2010-12-09 CN CN2010106250248A patent/CN102180070A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070213953A1 (en) * | 2004-11-19 | 2007-09-13 | The Yokohama Rubber Co., Ltd. | Tire Deformation Calculating Method And Tire Deformation Calculating Apparatus |
| US20080012718A1 (en) * | 2006-06-29 | 2008-01-17 | Fujitsu Limited | Amplifier and control method thereof |
| WO2009027423A1 (en) * | 2007-08-31 | 2009-03-05 | Continental Teves Ag & Co. Ohg | Tire module having piezosensitive sensor |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110346151A (en) * | 2018-04-03 | 2019-10-18 | 通用汽车环球科技运作有限责任公司 | Quantify tread rib marginal position |
| US10997708B2 (en) | 2018-04-03 | 2021-05-04 | GM Global Technology Operations LLC | Quantifying tread rib edge locations |
| CN110346151B (en) * | 2018-04-03 | 2022-01-11 | 通用汽车环球科技运作有限责任公司 | Apparatus and computer-implemented method for determining the mass of a tire |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20110065414A (en) | 2011-06-15 |
| DE102009057580B4 (en) | 2023-06-15 |
| DE102009057580A1 (en) | 2011-06-16 |
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