CN102356320A - Sensor module for vehicle security system and method for operating said sensor module - Google Patents
Sensor module for vehicle security system and method for operating said sensor module Download PDFInfo
- Publication number
- CN102356320A CN102356320A CN2010800121256A CN201080012125A CN102356320A CN 102356320 A CN102356320 A CN 102356320A CN 2010800121256 A CN2010800121256 A CN 2010800121256A CN 201080012125 A CN201080012125 A CN 201080012125A CN 102356320 A CN102356320 A CN 102356320A
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- Prior art keywords
- sensor assembly
- sensor
- signal
- energy
- power mode
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
- G01P3/42—Devices characterised by the use of electric or magnetic means
- G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
- G01P3/48—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage
- G01P3/481—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals
- G01P3/488—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals delivered by variable reluctance detectors
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
Abstract
The invention relates to a sensor module for a vehicle security system and to a method for operating said sensor module, whereby data are sent wirelessly via a transmitter depending on a sensor signal. The sensor signal and energy for operating the sensor module are created inductively by the same device, especially by means of a coil (SP).
Description
Technical field
The present invention relates to a kind of sensor assembly and a kind of method that is used to operate this sensor assembly that is used for Vehicle security system as described in the preamble according to independent claims.
Background technology
By the known a kind of wireless speed probe of DE 11 2,006 003 053 T5, wherein the revolution of automotive wheel is measured and be organized the datagram of the revolution of (aufbereiten) accepted theory paddle wheel by the measured value that sensor is obtained.In addition, this sensor is configured to make that datagram sends with wireless mode.For slotted line revolution (Drahtdrehzahl), measuring unit is measured the variation of magnetic flux and with wireless mode corresponding signal feedback is arrived base station or control module.This sensor element comprises the energy source or the current source of the electric current that providing usually of battery or other types is relatively little, for example from the electric supply installation with low-voltage.In addition, so-called ECU parts can forward sleep pattern to by the indication sensor parts, so that the conserve batteries electric current, because vehicle can stop.By US 2004/0150516 A1 known a kind of wireless revolution sensor system (Drehzahlfuehlersystem), wherein produce and/or store required energy, so that give wireless revolution sensitive element power supply.At this, be provided with the energy management apparatus (Energiemanagement) that use is used for the generator of energy generation as follows: this generator that is used for the energy generation utilizes the rotation of wheel of vehicle to generate energy.Efficient rechargeable battery or ultracapacitor are as memory device.So-called multipole rotary generator can be used as generator.Transmitter element can be switched to sleep pattern or inertia, wakes this sensor until opertaing device up through its transmitter module.
Summary of the invention
In contrast to this, the sensor assembly that is used for Vehicle security system according to the present invention has following advantage with the corresponding method that is used to operate this sensor assembly: the same apparatus that is used for generating with induction mode sensor signal also generates energy with induction mode.Repeatedly utilization to parts with this device causes cramped construction, makes sensor assembly to make up very for a short time.Thus, greatly reduced to want operational installing space.This causes cost to reduce at last.In addition, the use of permanent magnet (as permanent magnet under the situation of passive revolution speed sensitive element common) can save, and can adopt multipole scrambler thus.Through the greater number on this scrambler extremely to the variation of the magnetic flux that can improve the unit interval.Thus, spatial resolution (Ortsaufloesung) increases, and the voltage of being responded to also increases.
Sensor assembly should be understood that the structural unit like revolution sensitive element or acceleration transducer or slewing rate sensor or baroceptor or structure-borne sound sensor at this.Sensor assembly is especially also with relevant like the parts of steel wheel or multipole scrambler.Sensor assembly can have real sensor element at this, in said real sensor element, for example can use Hall effect, anisotropic magnetoresistance (AMR) and giant magnetoresistance (GMR effect) at this.Yet there is the pretreated ASIC (special IC) that carries out sensor signal in common ground except sensor element.Sensor assembly is the structural unit of sealing at this.Only be provided with coupling arrangement to the installation site.
Vehicle security system for example is travel kinetic-control system (Fahrdynamikregelung), brake system and/or air bag system.
The transmitter that is used for according to sensor signal wireless transmission data is radio transmitter at least, this radio transmitter for example with high spread spectrum, like DSSS: direct sequence spread spectrum (Direct Sequence Spread Spectrum) or send the continuous replacing (FHSS: FHSS (Frequency Hopping Spread Spectrum)) use of frequency.So-called RFID, be that transponder technology also can be used at this.At this, energy is supplied with the electromagnetic wave also can pass through to be launched and is carried out, and wherein in the aerial coil in sensor assembly the electric current of being responded to is carried out rectification and charges to accumulator.This accumulator is given the chip supplying electric current or can only be used for the microchip power supply to reading process.Signal directly perhaps sends to sensor by external sender by the transmitter in the opertaing device.RFID tag modulates electromagnetic wave and transmit information like this.
Data for example are datagrams, and real sensor values is positioned in the said datagram.The sensor values that sensor signal representative sensor element sends.At this, also can relate to the multiple sensor signal.Datagram also can have other data that perhaps are used for the additional data of error correction like identification data except useful data (for example sensor values).
This device for example is a coil as being learnt by dependent claims.Coil can have extremely various structure.Especially, this device also can be made through structuring on microchip.This device has following characteristic: this device generates sensor signal and the energy that is used for sensor assembly simultaneously.
The operation of sensor assembly refers to the entry into service of sensor assembly.
Detect with induction mode according to the variation of induction law at this magnetic flux.
The favourable expansion scheme and the improvement project of transmitter module that is used for Vehicle security system illustrated in independent claims and the method that is used to operate this sensor assembly that is used for Vehicle security system have been described in the dependent claims.
Proved advantageously, this device has at least one coil.Especially, this device can have only coil.
In addition advantageously, this device is configured to make energy and sensor signal to generate through the induction that perhaps rotatablely moves via linear movement.
Rotatablely move and for example can in the revolution sensitive element, realize that this multipole scrambler is constructed to dish by steel wheel or the multipole scrambler through rotation.
In addition advantageously, sensor assembly has at least one following capacitor as the accumulator that is used for energy: said capacitor is used to prevent that this member from receiving the influence of electromagnetic incident (instantaneous interference).Simultaneously, irradiation of electromagnetic waves also is attenuated.
In addition advantageously, sensor assembly has and has more than 48 extremely right multipole scramblers.This of this wireless transmission through having data disposes easily realizes and can realize high induced voltage or high spatial resolution.
In addition advantageously, sensor assembly disposes to low-power mode and high-power mode, and wherein sensor assembly has like down-converter: as described in converter change between low-power mode and high-power mode according to vehicle amount and/or incident.Low-power mode means following state: at this state, sensor assembly only consumes less energy, and high-power mode consumes more energy accordingly, and promptly high-power mode consumes more multipotency than low-power mode.
Converter can still also can or mechanically be constructed with the electronics mode according to software usually.According to for example being the vehicle amount of car speed and/or such as the wheel state, come this converter is exerted an influence like the incident of the wheel that skids or block.Through encourage (Ansteuerung) this converter, the correlativity of implementation rule relatively with incident.Especially, thus the message transmission rate of transmitter can be carried out with car speed relatively perhaps rule-basedly.Under first situation; Under the situation of low velocity, data are processed with low clock frequency in microcontroller or in other processors or analysis circuit, and are sent out to opertaing device from sensor assembly with low data rate; Under high-speed situation, this is opposite.Under the situation that is subjected to this converter of incident control ground excitation, the clock frequency of the data processing in microcontroller and the message transmission rate when normal operation are low.Under low-power mode, only monitor basically with given in advance time frame.When needing, as skidding at wheel or taking turns when stuck, signal is processed in microcontroller with high clock frequency and is transmitted with high velocity gradient (Geschwindigkeitsradient) data rate and/or absolute velocity data rate.Certainly be combined with signal transmission velocity correlation or rule-based.
Advantageously, sensor assembly has the energy management apparatus that has this switch, and this energy management apparatus is disposed on the integrated circuit, on this integrated circuit, also is provided with the pretreater of sensor signal.Thus, these functions can be integrated in each other the manufacturing that ASIC went up and can select cheap especially compactness.
Description of drawings
Embodiments of the invention are illustrated in the accompanying drawings and set forth in more detail in the following description.
Fig. 1 shows the frame circuit diagram of Vehicle security system,
Fig. 2 shows first form of implementation of revolution sensitive element,
Fig. 3 shows second form of implementation of revolution sensitive element,
Fig. 4 shows the frame circuit diagram according to sensor assembly of the present invention and opertaing device,
Fig. 5 shows sensor assembly about the circuit part that energy generates and sensor signal generates,
Fig. 6 shows the frame circuit diagram of transmitter, and
Fig. 7 shows the process flow diagram of the method according to this invention.
Embodiment
Fig. 1 shows the Vehicle security system among the vehicle FZ with frame circuit diagram, the actuator AKT that this Vehicle security system has four revolution sensitive element WSS1 to 4, be used to travel the opertaing device ESP of kinetic-control system and carried out the ESP excitation by the ESP opertaing device.Revolution sensitive element WSS1 to 4 is connected with opertaing device ESP through wireless radio transmission; Make revolution sensitive element WSS1 to 4 have antenna A1 to A4 respectively; So that give opertaing device ESP with the data transmission of said revolution sensitive element WSS1 to 4; Wherein opertaing device ESP has antenna A5, is used to receive these data.Thus, each revolution sensitive element WSS1 to 4 has sending module at least, so that for example give opertaing device ESP with spectrum spreading method with data transmission, wherein opertaing device ESP has at least one receiving trap, so that can correctly receive and these signals of demodulation.Possible is that the dedicated radio link uniaxially between revolution sensitive element WSS1 to 4 and opertaing device ESP is implemented or also can be implemented two-wayly from the revolution sensitive element to opertaing device ESP.Broadcast mode also is possible.This refers to, and transmitter sends the data to all receivers, and specific receiver is not carried out addressing, as under the situation of radio broadcasting transmission common.
Also possible is, the revolution sensitive element is given other equipment, other sensor for example with its data transmission, and said other sensor then connects through cable and is connected with opertaing device ESP, and then implements second portion through the wire transmission data like this.Opertaing device ESP encourages actuator AKT according to this sensor and other sensor signals, for example encourages clamping device.Except revolution sensitive element WSS1 to 4 shown here, be used for other sensors of Vehicle security system, like crash sensor, i.e. for example acceleration transducer, slewing rate sensor, force transducer, structure-borne sound sensor, baroceptor and also can be linked with wireless mode and opertaing device like video, radar, laser radar or ultrasonic environmental sensor.
Fig. 2 shows the mode of action of active revolution sensitive element, and this active revolution sensitive element is connected on the voltage source and (mit) for operation and is connected on the energy source.The variation of sensor magnetic flux density.At this, for example Hall element is set to sensor element 22, and this Hall element is measured the variation of the magnetic flux density of steel wheel 20.Additionally, also be provided with magnet 21, this magnet 21 is changed aspect magnetic field owing to the steel wheel that rotates.Resulting signal is a sinusoidal signal 23, and this sinusoidal signal is forwarded to opertaing device ECU, is used for further processing.
Another form of implementation of revolution sensitive element is shown in Figure 3.Here, the multipole scrambler 30 with magnetic pole of variation is set to wheel.This revolution of taking turns causes the variation of the magnetic flux at sensor element 31 places.The signal of sensor element is analyzed by ASIC, and then is transferred to opertaing device ECU as digital signal.These digital signals are indicated with Reference numeral 32.
Known principle is Hall effect, anisotropic magnetoresistance and giant magnetoresistance (GMR effect).Signal is by the ASIC arrangement and the signal with the constant amplitude that has nothing to do with motion is provided, and this signal is transferred to opertaing device via radio continuously to each sensor equally and in microcontroller, is further processed there.
Fig. 4 shows the sensor assembly of indicating with Reference numeral 40 to 45 according to the present invention and shows opertaing device ECU with frame circuit diagram.Sensor assembly according to the present invention has the device 40 that unique being used for generates sensor signal and energy simultaneously.Energy management apparatus 41 through being disposed in usually on the ASIC stores the energy in the accumulator 42 (for example capacitor), and said accumulator 42 also is used to EMV (Electro Magnetic Compatibility).Sensor signal be transferred within the microcontroller 43 or outside digital to analog converter.Microcontroller 43 is stored in sensor signal in the buffer circle 44; And when showing this point like the vehicle amount of car speed and/or like wheel incident stuck or that skid, this microcontroller 43 will be given other transceivers 46 of opertaing device ECU from these data of buffer circle via radio signal transmission through transceiver 45.These data can or be obtained by opertaing device ECU from sensor signal itself.For this reason, wireless communication is fabricated at this also two-wayly.ASIC forms the voltage signal with velocity correlation by sensor signal, should in sensor assembly, be processed with digital form with voltage signal of velocity correlation.Microcontroller 43 can convert sensor signal to the opertaing device specific signal at this, estimates this signal and data are stored in the toroidal memory continuously.The data of being stored are for example followed available when unallowed velocity variations under normal conditions and are forwarded to transceiver 45, so that give opertaing device ECU with these data transmission.In ASIC or in microcontroller, converting digital speed signal or acceleration signal to can realize being easy to further handle.This rate signal or acceleration signal are transferred to opertaing device ECU with fixing discrete time can directly for the opertaing device ECU that has transmitter 45 or transceiver at interval, and perhaps this signal is further processed in microcontroller in advance and estimates.Then can adjust above-mentioned and velocity correlation or the rule-based message transmission rate of transceiver 45 here.
Fig. 5 makes the part according to the present invention of sensor assembly visual.Coil SP is connected to ASIC, on the one hand is used to carry out sensor processing PP and is used for energy on the other hand and generates EE.Power supply EE especially can give capacitor C or also can give other capacitors or accumulator charging.Sensor signal by sensor signal pretreatment unit PP arrangement is transferred to following transceiver TX: said transceiver TX launches data through antenna AT according to sensor signal.
The possible embodiment of transceiver TX is shown in Figure 6.Digital signal can at first be converted into simulating signal, so that this signal is amplified and then for example through spread spectrum or also through frequency hopping this signal is modulated.Modulating device MOD also can realize with digital form, and after modulating device, can also adopt amplifier.On the contrary, receiver architecture is built as: be frequency converter, amplifier and wave filter and digital signal processing device mostly after receiving antenna.
Fig. 7 shows the method according to this invention with process flow diagram.At method step 700, for example utilize coil SP to carry out sensor signal generation and energy generation simultaneously.Whether by pre-service and parameter for example is provided, energy management apparatus needs said parameter at method step 702 to sensor signal at method step 701, must between the low-power mode of sensor assembly and high-power mode, change so that judge.Prepared to be used for to transmit and be sent out at method step 704 by pretreated sensor signal at method step 705.It for example is to make up datagram that preparation is used for transmission.Energy management apparatus is judged at method step 703: how many energy are provided, and promptly which kind of consumption high-power mode or low-power mode maybe can adjust through the clock rate of processing or through the transfer rate that transmitter TX sends.
Claims (10)
1. sensor assembly that is used for Vehicle security system; Wherein, Said sensor assembly has transmitter (TX); Be used for sending data with wireless mode according to sensor signal; It is characterized in that said sensor assembly utilizes identical device to generate sensor signal and the energy that is used for said sensor assembly with induction mode.
2. sensor assembly according to claim 1 is characterized in that, said device has at least one coil (SP).
3. sensor assembly according to claim 1 and 2 is characterized in that, said device is configured to make energy and sensor signal through perhaps generating via the induction that rotatablely moves via linear motion.
4. according to one of aforesaid right requirement described sensor assembly, it is characterized in that said sensor assembly has at least one capacitor (C) as the accumulator that is used for energy, said at least one capacitor (C) also is used to Electro Magnetic Compatibility.
5. one of require described sensor assembly according to aforesaid right, it is characterized in that, said sensor assembly has and has more than 48 extremely right multipole scramblers.
6. according to one of aforesaid right requirement described sensor assembly; It is characterized in that; Said sensor assembly is configured to low-power mode and high-power mode, and wherein said sensor assembly has like down-converter: this converter is changed between low-power mode and high-power mode according to vehicle amount and/or incident.
7. sensor assembly according to claim 6 is characterized in that the vehicle amount is a car speed.
8. according to claim 6 or 7 described sensor assemblies, it is characterized in that incident is the wheel state.
9. according to the described sensor assembly of one of claim 6 to 8; It is characterized in that; Said sensor assembly has the energy management apparatus that has converter, and this energy management apparatus is disposed on the integrated circuit of the pretreatment unit (PP) that also is provided with sensor signal.
10. method that is used to operate the sensor assembly that is used for Vehicle security system; Wherein send data according to sensor signal with wireless mode through transmitter (TX); It is characterized in that sensor signal utilizes identical device to generate with induction mode with the energy that is used for the operation sensor module.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE200910001616 DE102009001616A1 (en) | 2009-03-17 | 2009-03-17 | Sensor module for a vehicle safety system and method for operating such a sensor module |
| DE102009001616.3 | 2009-03-17 | ||
| PCT/EP2010/053108 WO2010105963A2 (en) | 2009-03-17 | 2010-03-11 | Sensor module for a vehicle security system and method for operating said sensor module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102356320A true CN102356320A (en) | 2012-02-15 |
Family
ID=42173944
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010800121256A Pending CN102356320A (en) | 2009-03-17 | 2010-03-11 | Sensor module for vehicle security system and method for operating said sensor module |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP2419744A2 (en) |
| CN (1) | CN102356320A (en) |
| DE (1) | DE102009001616A1 (en) |
| WO (1) | WO2010105963A2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102014015129A1 (en) * | 2014-10-14 | 2016-04-14 | Wabco Gmbh | Method for identifying a sensor device for speed measurement, sensor device for speed measurement and vehicle with at least one sensor device for speed measurement |
| US10473678B2 (en) | 2016-04-18 | 2019-11-12 | Ford Global Technologies, Llc | Detection and wireless transmission of wheel rotation direction |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1075633C (en) * | 1992-10-19 | 2001-11-28 | Abskf公司 | Method and device in a bearing |
| CN1401971A (en) * | 2001-08-07 | 2003-03-12 | 日本精工株式会社 | Radio sensor, rolling bearing with sensor, managing device and monitoring device |
| US20040150516A1 (en) * | 2003-02-05 | 2004-08-05 | Delphi Technologies, Inc. | Wireless wheel speed sensor system |
| US20050150281A1 (en) * | 2004-01-12 | 2005-07-14 | Thaddeus Schroeder | Self-powered wireless sensor assembly for sensing angular position of the engine crankshaft in a vehicle |
| US20060239597A1 (en) * | 2002-03-08 | 2006-10-26 | Ntn Corporation | Rotation detecting device and wheel support bearing assembly utilizing the same |
| EP1832849A2 (en) * | 2006-03-09 | 2007-09-12 | Lenord, Bauer & Co. GmbH | Revolution counter |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7408452B2 (en) | 2005-10-24 | 2008-08-05 | Infineon Technologies Ag | Wireless wheel speed sensor |
| DE102008008720A1 (en) * | 2008-02-12 | 2009-08-27 | Knorr-Bremse Systeme für Nutzfahrzeuge GmbH | Measuring device for measuring relative rotational speeds with wireless signal transmission |
-
2009
- 2009-03-17 DE DE200910001616 patent/DE102009001616A1/en not_active Ceased
-
2010
- 2010-03-11 WO PCT/EP2010/053108 patent/WO2010105963A2/en active Application Filing
- 2010-03-11 EP EP10707546A patent/EP2419744A2/en not_active Withdrawn
- 2010-03-11 CN CN2010800121256A patent/CN102356320A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1075633C (en) * | 1992-10-19 | 2001-11-28 | Abskf公司 | Method and device in a bearing |
| CN1401971A (en) * | 2001-08-07 | 2003-03-12 | 日本精工株式会社 | Radio sensor, rolling bearing with sensor, managing device and monitoring device |
| US20060239597A1 (en) * | 2002-03-08 | 2006-10-26 | Ntn Corporation | Rotation detecting device and wheel support bearing assembly utilizing the same |
| US20040150516A1 (en) * | 2003-02-05 | 2004-08-05 | Delphi Technologies, Inc. | Wireless wheel speed sensor system |
| US20050150281A1 (en) * | 2004-01-12 | 2005-07-14 | Thaddeus Schroeder | Self-powered wireless sensor assembly for sensing angular position of the engine crankshaft in a vehicle |
| EP1832849A2 (en) * | 2006-03-09 | 2007-09-12 | Lenord, Bauer & Co. GmbH | Revolution counter |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102009001616A1 (en) | 2010-09-23 |
| WO2010105963A3 (en) | 2010-12-23 |
| WO2010105963A2 (en) | 2010-09-23 |
| EP2419744A2 (en) | 2012-02-22 |
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Application publication date: 20120215 |