CN102934360A - Capacitive sensor system - Google Patents
Capacitive sensor system Download PDFInfo
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- CN102934360A CN102934360A CN2011800281033A CN201180028103A CN102934360A CN 102934360 A CN102934360 A CN 102934360A CN 2011800281033 A CN2011800281033 A CN 2011800281033A CN 201180028103 A CN201180028103 A CN 201180028103A CN 102934360 A CN102934360 A CN 102934360A
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- signal
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R25/00—Fittings or systems for preventing or indicating unauthorised use or theft of vehicles
- B60R25/10—Fittings or systems for preventing or indicating unauthorised use or theft of vehicles actuating a signalling device
- B60R25/1004—Alarm systems characterised by the type of sensor, e.g. current sensing means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R25/00—Fittings or systems for preventing or indicating unauthorised use or theft of vehicles
- B60R25/10—Fittings or systems for preventing or indicating unauthorised use or theft of vehicles actuating a signalling device
- B60R25/102—Fittings or systems for preventing or indicating unauthorised use or theft of vehicles actuating a signalling device a signal being sent to a remote location, e.g. a radio signal being transmitted to a police station, a security company or the owner
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R25/00—Fittings or systems for preventing or indicating unauthorised use or theft of vehicles
- B60R25/10—Fittings or systems for preventing or indicating unauthorised use or theft of vehicles actuating a signalling device
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B13/00—Burglar, theft or intruder alarms
- G08B13/22—Electrical actuation
- G08B13/26—Electrical actuation by proximity of an intruder causing variation in capacitance or inductance of a circuit
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/94—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated
- H03K17/945—Proximity switches
- H03K17/955—Proximity switches using a capacitive detector
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Geophysics And Detection Of Objects (AREA)
- Emergency Alarm Devices (AREA)
- Measurement Of Resistance Or Impedance (AREA)
- Radar Systems Or Details Thereof (AREA)
Abstract
Capacitive sensor system for a vehicle, comprising a chassis earth, a signal generator, a signal detector and a processing unit, the signal generator being adapted to generating a sensor signal with a frequency and an amplitude applied between the chassis earth and a virtual external earth. The system comprises an earth antenna adapted to serving as the virtual external earth, electrically connected to the signal generator and so disposed on the vehicle that it is electrically insulated from the chassis earth, has a predetermined size and is situated a predetermined distance from the ground surface. The signal detector is adapted to detecting and determining a measure of the voltage potential between the chassis earth and the external virtual earth, and to generating and conveying to the processing unit a measurement signal based thereon, and the processing unit is adapted to processing the measurement signal and to conveying the processed measurement signal to an alarm system which is adapted to generating one or more alarm signals on the basis of the processed measurement signal.
Description
Technical field
The present invention relates to the capacitive sensor system according to the independent claims preamble.
Background technology
Because the relatively not protected mode of current valuable cargo by road transport, swarm into now and steal truck, trailer and semitrailer and become subject matter thereby cause.This theft and swarm into the prime cost that has caused hauler and insurance company.They also cause the driver to feel dangerous when sleeping in truck.Locking system and warning system are widely used in the protection vehicle and exempt from and swarm into and steal, but the system of today has the limitation that is difficult to realize gratifying protection.
Current outer cover for truck protects solution normally based on door and hatch by warning system monitoring driving chamber.Under specific circumstances, cargo door is also covered by this monitoring institute, and this outer cover protect solution can driver's cabin or any one of hatch detect intrusion when being opened.This is by Scania (Scania) and the current general solution that provides of other truckmakers.
Be that in many shortcomings that can be used for the outer cover protection Notable of truck these protections usually are unsuitable for monitoring trailer or semitrailer, or need expensive modification so that they can monitor trailer or semitrailer.And these systems usually are unsuitable for using on bus.In order to monitor trailer and semitrailer, current not good solution is because traction unit usually changes trailer and semitrailer.This problem is that all trailers and semitrailer need to assemble the transducer for monitoring, and they must become one with the supervisory control system of traction unit.With reference to WO-2008/1210141, this WO-2008/1210141 relates to for vehicle, in particular for monitoring and the communication system of long vehicle for the known solution of this problem.For the lamp unit such as emergency warning lamp and position lamp on the vehicle arranges monitoring sensor and communication unit, the output signal of autobiography sensor wirelessly is sent to central location with future.Each transducer has defined the monitored space for detection of the object in the monitored space or motion.This transducer for example can be sonac, doppler sensor or radar sensor.WO-2008/121041 has proposed to solve the problem of how to communicate by letter each other for the transducer of monitoring vehicle, especially in the situation that long vehicle, and this solution relates to the use wireless network, and this wireless network can be replenished by the other lamp unit that for example is positioned on the semitrailer.Shortcoming according to the solution of WO-2008/121041 is: because assembly and Technology Need are suitable for the supervisory control system of traction unit, so it is relatively costly.
US-2006/0250230 proposes a kind of monitoring of the vehicle of parking for operation and the method for warning device.This equipment comprise for determine in vehicle and the behaviour area near the sensor unit of the distance between the object and the consersion unit that is connected to control unit and is activated during near vehicle at object.The behaviour area is divided into outside the first subarea and inner the second subarea at least.Than the activation of consersion unit with respect to the quantity in the second subarea, type, density and/or order, this consersion unit with respect to the quantity in the first subarea, type, density and/or order by gradual activation.
US-2007/0205775 proposes a kind of for being distributed in lip-deep capacitive detector capacitive character and determining object's position and be intended to determine that object is with respect to the equipment of the position on surface by a plurality of.According to this equipment, each detector is connected to voltage source via coupling capacitance, and can adopt the supply voltage power supply, and valuator device is provided and this valuator device is connected to detector, detector signal is converted to the output signal as the measurement of object's position.
The capacitive character proximity sensor is within being called the transducer category of proximity sensor, and this proximity sensor can be in the situation that need not to contact their detected objects.The example of other proximity sensor is photoelectricity and inductive proximity sensor.This capacitive character proximity sensor is based on its dielectric property detected object, and has many applications of utilizing this characteristic.
The primary clustering of capacitive character proximity sensor is capacitor plate, that is, and and half of capacitor.
In brief, capacitor comprises two conductive plates that separated by dielectric material.The voltage difference that is applied to these pole plates produces electric field at the two ends of dielectric material.This electric field stored charge, and if energy source cut off, electric field is weak, and discharges its energy with the form of voltage, and this voltage progressively descends towards zero from its original levels.
The ability of capacitor stores electric charge is called electric capacity and measures with farad, and its quantity depends on area of section, the distance between this capacitor plate and the dielectric constant of dielectric material of capacitor plate.Glassware for drinking water has about 80 very high dielectric constant, and air has about 1 subnormal period.The constant of most of material is between these values.
Therefore capacitor sensor is half of capacitor, i.e. capacitor plate.Through the object of pole plate front as the second capacitor plate and dielectric material the two, and capacitive sensor is measured the electric capacity that produces in this situation.At least can detect the object that any this dielectric constant is different from the constant of air in short distance.The variation of measuring equipment with measurement electric capacity can be provided subsequently, and can for example set predetermined threshold based on the distance between object and the pole plate.
It is in the food industry whether expectation detection food containers fills up that the typical case of capacitive sensor uses.
The capacitive character proximity sensor can come detected object based on the ability that object begins to charge.Even because non-conducting material also can charge, therefore can adopt the transducer of the type to detect all objects.
Fig. 1 schematically shows the example of capacitive sensor equipment, and this capacitive sensor equipment comprises the oscillator that has applied dc voltage and the AC electric current has been transported to capacitor plate via current sensor.Because when pole plate during by positive charge, negative electrical charge attracted to the second pole plate, still can be so that more positive charges be fed to the first pole plate, so capacitor plate can keep electric charge.Supposing provides two pole plates and closer to each other, is very difficult to make one in them to carry a large amount of electric charges.
Therefore capacitive sensor only comprises one of pole plate, and if nearby exist and have another pole plate of opposite charges, then the AC electric current can be fed to electric current this pole plate, or carries electric current and leave this pole plate.Object to be detected is as the second pole plate.If enough proximity transducer pole plates of object, and be subject to the charge affects of sensor plate, then it will obtain opposite charges, and electric current can be supplied to sensor plate, and carry from sensor plate and to leave, and can be measured by current sensor.
When capacitive sensor during for detection of the object of vehicle periphery, some shortcomings of these transducers are not too important, and for example they are insensitive facts in direction.Real system will have many transducers that distribute along the outside vehicle regular intervals.This means near the transducer that will always have object, consequently relatively limited scope will be enough, and object can be always located by transducer with for detection of the position of the transducer of object.The shortage of direction sensitivity is actual expectation, makes it possible to detect be between the transducer and very near the object of vehicle.
Because the shortage of direction sensitivity, capacitive sensor exist the object that also therefore has nothing to do to measure specific electric capacity from environment always.When installation of sensors was on vehicle, it detected vehicle self and external ground (external earth).When increasing, this background capacitance detects unknown object.Yet one meter distance, the variation of electric capacity is less than 10 repeatedly power of background capacitance, thereby much smaller than this background capacitance.Must determine this background capacitance, so that can from measure, it be deducted.
Because the electric capacity of the relative object of background capacitance is main, and also is offset, therefore compare the absolute being that detects unknown object or do not exist, come the variation of testing environment then simply too much with transducer.The amplitude of variation of background capacitance depends on the degree of ambient stable.
In the use pattern of change detected, the detector that transducer should not be regarded as existing, and should be considered as existing the detector of variation.
The shortcoming of the warning system in the current use is: their relative complex, and for be suitable for will coupling the vehicle of various different semitrailers be expensive.And, because changed a large amount of doors, storage hatch etc., and cause expensive installation, so current system usually is difficult to be installed on the bus.
The objective of the invention is to propose a kind of sensing system, this sensing system can be simply and is installed at an easy rate on truck and the bus, and does not especially need extra modification when semitrailer is coupled to truck.
Summary of the invention
Employing realizes above-mentioned purpose by the present invention that independent claims limit.
Dependent claims defines preferred embodiment.
The present invention relates to the equipment be used to the outer cover protection of the vehicle that has or do not have trailer/semitrailer.The present invention uses the capacitive sensor system, and it makes it possible to detect the intrusion in the district that the vehicle periphery transducer is set up.This sensing system is connected to vehicle monitoring system, and this vehicle monitoring system for example provides warning by light or sound or via telematic.This technical protection together with the whole vehicle of trailer or semitrailer arbitrarily.
The present invention has realized the outer cover protection of raising for the traction unit with any trailer or semitrailer.Semitrailer is coupled to traction unit has increased electric capacity, but because by semitrailer also being connected to the chassis earth of traction unit, and sensing system self can automatic calibration, if therefore be coupled semitrailer, self will adapt to this sensing system automatically.
The capacitive sensor system can provide the warning signal that is suitable for the degree of invading.Also can upgrade the system with existing supervisory control system.This system also can be applicable on other vehicle, for example, and bus, and be applied in for example dislocation generation factory, and owing to can reduce the quantity of transducer, so this system is more simple and cheaper than the systems of many today.
In brief, the mode of this system works is any increase that will cause electric capacity relatively near the people of truck or semitrailer.The result is that voltage separates the increase variation of (voltagesplit) and measuring-signal along with the variation that occurs between chassis earth and virtual ground.
Description of drawings
Fig. 1 schematically shows the example of capacitive sensor equipment;
Fig. 2 implements the schematic diagram with truck of semitrailer of the present invention thereon;
Fig. 3 is the block diagram according to capacitive sensor of the present invention system;
Fig. 4 is the view that illustrates according to measuring-signal of the present invention.
Embodiment
Fig. 2 implements the schematic diagram with truck of semitrailer of the present invention thereon.The capacitive sensor system comprises signal generator, signal detector and the processing unit that jointly is expressed as Reference numeral 1, this capacitive sensor system is connected to the chassis earth 2 into any earth point on the vehicle chassis, and is connected to virtual external ground 3 via grounded antenna 4.
Grounded antenna 4 is for example for being positioned at closely pole plate or the cable of (external ground).
According to embodiment,, will be fastened on below the fuel tank with the grounded antenna 4 of pole plate form such as by the mode with the fuel tank electrical insulation such as valve rubber with grounded antenna 4.Antenna size with this form must be at least about 1m
2, with the sensitivity of realization system expectation, especially when being implemented in the truck with semitrailer.If fuel tank and the isolation of chassis electric current and its size also can use fuel tank self as antenna with enough apart from the distance on ground.The fastening point that also can have other is for example on other position that is fit to of some below muffler or below vehicle.
Output signal from processing unit is the reference value that produces by the potential difference Δ V that measures between chassis earth 2 and the external ground 3.The current potential of chassis earth at object 5(for example, the people) change when approaching any part be connected to chassis earth.By detecting potential difference and how to change, thus can detected object whether be in vehicle near.Object is more approaching, and it is larger that potential difference will become, and makes it possible to detect the degree of intrusion, that is, object is near the degree of vehicle.
When the trailer of coupling or semitrailer when being electrically connected to vehicle chassis, chassis earth also will cater to trailer/semitrailer.Potential difference also therefore will be near the object influences of trailer/semitrailer.
Sensing system will be invaded for example electricity or the vehicle monitoring system 6 of wirelessly communicating by letter subsequently, and this vehicle monitoring system 6 triggers the warning of the situation that is suitable for detecting.
With reference to Fig. 3, this Fig. 3 is the block diagram that schematically shows according to the capacitive sensor system for vehicle of the present invention, and this sensing system comprises chassis earth, signal generator, signal detector and processing unit.
Signal generator is suitable for producing and has the frequency that is applied between chassis earth 2 and the virtual external ground 3 and the sensor signal of amplitude.Sensor signal is preferably in the 2-20kHz scope frequency of (for example, approximately 10kHz), and in the 2-20V scope amplitude of (for example, approximately 10V).In order to make the measurement of signal to noise ratio as well as possible, according to preferred embodiment, relate to so-called frequency frequency hopping, that is, frequency changes according to AD HOC.
System also comprises the grounded antenna 4 that is suitable for use as virtual external ground 3 and is electrically connected to signal generator.With grounded antenna 4 with the chassis earth electric insulation be arranged on the vehicle.Antenna has preliminary dimension, and is positioned at apart from the predetermined distance of ground surface.
Chassis earth has the electric capacity for the magnitude of several nF of truck, and also identical for semitrailer, and antenna pad (grounded antenna 4) will have the magnitude of 2 powers of direct-to-ground capacitance little 10, that is, and and 10pF(0.01nF).Grounded antenna 4 should be preferably has large as far as possible over the ground electric capacity.
According to preferred embodiment, grounded antenna is suitable for being installed on the downside of vehicle, and for example comprising the metal polar plate with smooth surface, this flatly is installed in for this metal polar plate, and (for example, on the downside of this vehicle fuel tank) is necessary on the downside of vehicle.Other position on vehicle lower side also is feasible certainly.Grounded antenna also can comprise a plurality of pole plates that are electrically connected.According to another embodiment, grounded antenna can be taked the form of at least part of or whole vehicle fuel tank.Certainly need part or the whole and chassis earth insulation of this case.
As mentioned above, grounded antenna has at least 1m
2The surface, and be preferably approximately 1.5m
2
The shape of grounded antenna is not too important, but the distance on its surface that represents and distance ground thereof is important.Pole plate is larger, and its place that is positioned at is nearer over the ground, and electric capacity (grounding connection) is then larger.Be desirably in grounded antenna 4 and with reference to having large as far as possible electric capacity between the ground connection (external ground).
The size of antenna depends on minimum capacitance difference of allowing between chassis earth and " antenna ground " (virtual external ground).The size of the result's that can provide for the truck with semitrailer pole plate is approximately 0.8 * 1.6m.
According to another embodiment, grounded antenna is taked the form of electric insulation cable, is arranged so that active surface produces the electric capacity corresponding with the electric capacity of metal polar plate.
Grounded antenna is suitable for being positioned at apart from the preset distance of ground surface in the 0.3-0.8m scope, and also provides electric insulation layer in the side towards vehicle chassis when antenna is installed on the vehicle, for example, and valve rubber.Distance between pole plate (grounded antenna 4) and the fuel tank is preferably the magnitude of about 10mm, and for example by valve rubber or rubber gasket antenna is insulated.Here importantly pole plate and this tank current isolation, and measure the creep currents take to prevent between case and the pole plate.Electric insulation layer can but and nonessential protection pole plate both sides.
The size of antenna and to the distance of ground surface will so that the electric capacity (C1 among Fig. 3) that produces with respect to ground surface (external ground) usually less than about 10 2 powers of the electric capacity that produces between vehicle chassis and the ground surface (C2 among Fig. 3).Work as object, for example, the people is during near vehicle, and capacitor C 2 will reduce.
Signal detector be suitable for detecting and definite chassis earth and outside virtual ground between the measuring amount of voltage potential, and be suitable for producing measuring-signal and measuring-signal being sent to processing unit based on this.
Processing unit is suitable for processing measuring-signal, and handled measuring-signal is transferred to warning system, and this warning system is suitable for handled measuring-signal is compared with one or more threshold levels, and relatively produces one or more alarm signals based on these.This alarm signal can be modulating signal (for example, the headlight of unlatching or interior lighting), acoustic signal (for example, the loudspeaker of siren or vehicle), or for example sends signals to the external alert center via the mobile network.
According to an embodiment, processing unit is processed measuring-signal by the derivative of determining measuring-signal, and according to another embodiment, processing unit is processed measuring-signal by the absolute value that produces measuring-signal.According to another embodiment, processing unit is processed measuring-signal by measurement by magnification signal and the absolute value that produces measuring-signal.According to an embodiment, processing unit is processed measuring-signal by determining the derivative that changes in the measuring-signal.Also can carry out the more processing of complex form to measuring-signal, for example, can determine the level difference between two different sliding averages (sliding mean value) of measuring-signal, namely, be suitable for the slow sliding average of external environment condition, and be the fast sliding average of measuring-signal self.Process these by various signal processing algorithms, to obtain available signal.
The example that in Fig. 4, has presented the measuring-signal with slow sliding average and fast sliding average.For the signal with slow sliding average (continuous lines), usually adopt one or the value that detects during many seconds make measurement.In the situation that fast sliding average (dotted line), one or nearly make measurement during many milliseconds of 50ms.In view, by double-head arrow difference in the amplitude (A) and the derivative of each signal are shown.With the amplitude difference of same time point and/or derivative difference and suitable threshold, produce fast and reliably and detect.
Ordinary circumstance is for using capacitance variations relative between chassis earth and the antenna ground (virtual external ground).
The present invention does not limit to and above preferred embodiment.Can use replacement miscellaneous, modification and equivalents.Therefore above-described embodiment should not be regarded as the restriction to the protection range of the present invention that is defined by the following claims.
Claims (15)
1. capacitive sensor system that is used for vehicle, comprise chassis earth (2), signal generator (1), signal detector (1) and processing unit (1), described signal generator (1) is suitable for producing and has the frequency that is applied between described chassis earth (2) and the virtual external ground (3) and the sensor signal of amplitude; It is characterized in that:
Described system comprises grounded antenna (4), described grounded antenna (4) is suitable for use as described virtual external ground (3), be electrically connected to described signal generator (1), and described grounded antenna (4) described vehicle be set to with described chassis earth (2) electric insulation, have preliminary dimension and be positioned at apart from the predetermined distance of ground surface;
Described signal detector (1) is suitable for detecting and determining the measuring amount of the described voltage between described chassis earth (2) and the described virtual external ground (3), and produce measuring-signal and this measuring-signal is sent to described processing unit (1) based on this, and
Described processing unit (1) is suitable for processing described measuring-signal, and handled measuring-signal is sent to warning system (6), and described warning system (6) is suitable for producing one or more alarm signals based on handled measuring-signal.
2. equipment according to claim 1, wherein, described processing unit (1) is processed described measuring-signal by the derivative of determining described measuring-signal.
3. equipment according to claim 1, wherein, described processing unit (1) is processed described measuring-signal by the absolute value that produces described measuring-signal.
4. according to each described equipment in the aforementioned claim, wherein, described warning system (6) is suitable for handled measuring-signal is compared with one or more threshold levels, and relatively produces one or more alarm signals based on this.
5. according to each described equipment in the aforementioned claim, wherein, described grounded antenna (4) comprises the metal polar plate with smooth surface, and described metal polar plate flatly is installed on the downside of described vehicle.
6. according to each described equipment in the aforementioned claim, wherein, described grounded antenna (4) is suitable for being installed on the downside of described vehicle.
7. according to each described equipment in the aforementioned claim, wherein, described grounded antenna (4) is suitable for being installed on the downside of fuel tank of described vehicle.
8. each described equipment according to claim 1-5, wherein, described grounded antenna (4) is taked the form of at least a portion of the fuel tank of described vehicle.
9. according to each described equipment in the aforementioned claim, wherein, described grounded antenna (4) is suitable for being positioned at apart from the preset distance place of described ground surface in the scope of 0.3-0.8m.
10. according to each described equipment in the aforementioned claim, wherein, described grounded antenna (4) has at least 1m
2The surface.
11. according to each described equipment in the aforementioned claim, wherein, described grounded antenna (4) is provided with electric insulation layer, described grounded antenna (4) on a side of described vehicle chassis when described electric insulation layer is located at described grounded antenna (4) and is installed on the described vehicle.
12. equipment according to claim 1, wherein, described grounded antenna has surface size so that produce with respect to the electric capacity of described ground surface usually less than approximately 2 powers of 10 of the electric capacity that produces between described vehicle chassis and the described ground surface.
13. equipment according to claim 1, wherein, described grounded antenna is taked the form of electric insulation cable.
14. according to each described equipment in the aforementioned claim, wherein, described signal generator (1) is suitable for producing frequency in the 2-20kHz scope and the sensor signal of amplitude in the 2-20V scope.
15. equipment according to claim 14, wherein, it is that 10kHz and amplitude are the sensor signal of 10V that described signal generator is suitable for producing frequency.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE1050582A SE538227C2 (en) | 2010-06-07 | 2010-06-07 | Capacitive sensor system |
| SE1050582-4 | 2010-06-07 | ||
| PCT/SE2011/050695 WO2011155891A1 (en) | 2010-06-07 | 2011-06-07 | Capacitive sensor system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102934360A true CN102934360A (en) | 2013-02-13 |
Family
ID=45098304
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011800281033A Pending CN102934360A (en) | 2010-06-07 | 2011-06-07 | Capacitive sensor system |
Country Status (7)
| Country | Link |
|---|---|
| EP (1) | EP2577867A4 (en) |
| KR (1) | KR101496431B1 (en) |
| CN (1) | CN102934360A (en) |
| BR (1) | BR112012030054A2 (en) |
| RU (1) | RU2012157241A (en) |
| SE (1) | SE538227C2 (en) |
| WO (1) | WO2011155891A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111815882A (en) * | 2020-07-21 | 2020-10-23 | 国网河南淅川县供电公司 | Alarm for outdoor power supply operation |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT13314U1 (en) * | 2012-08-22 | 2013-10-15 | Heinz Martin | alarm device |
| FR3033148B1 (en) * | 2015-02-26 | 2017-03-31 | Univ De Reims Champagne-Ardenne | DEVICE FOR DETECTING AND ANALYZING THE NATURE OF OBSTACLES |
| WO2017214657A1 (en) * | 2016-06-14 | 2017-12-21 | Lumen International Holdings Pty Ltd | Electrical systems and components and methods therefor |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6469524B1 (en) * | 2000-08-25 | 2002-10-22 | Delphi Technologies, Inc. | System and method for interrogating a capacitive sensor |
| CN1839326A (en) * | 2003-07-28 | 2006-09-27 | Ab汽车电子有限公司 | Capacitive proximity sensor |
| US20100079269A1 (en) * | 2008-09-30 | 2010-04-01 | Dirk Hammerschmidt | Capacitive detection systems and methods |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5394292A (en) * | 1991-04-30 | 1995-02-28 | Tsuden Kabushiki Kaisha | Electronic car bumper |
| GB2376075A (en) * | 2001-06-01 | 2002-12-04 | Ab Automotive Electronics Ltd | Bumper proximity detector using capacitive sensor |
| DE102004018630A1 (en) * | 2004-04-16 | 2005-11-10 | Pepperl + Fuchs Gmbh | Device, sensor arrangement and method for the capacitive position detection of a target object |
| GB2423822A (en) * | 2005-03-02 | 2006-09-06 | Automotive Electronics Ltd Ab | Capacitive proximity sensor with reduced sensitivity to water trickles |
-
2010
- 2010-06-07 SE SE1050582A patent/SE538227C2/en unknown
-
2011
- 2011-06-07 CN CN2011800281033A patent/CN102934360A/en active Pending
- 2011-06-07 BR BR112012030054A patent/BR112012030054A2/en not_active IP Right Cessation
- 2011-06-07 RU RU2012157241/08A patent/RU2012157241A/en not_active Application Discontinuation
- 2011-06-07 KR KR1020127033734A patent/KR101496431B1/en not_active IP Right Cessation
- 2011-06-07 EP EP11792744.2A patent/EP2577867A4/en not_active Withdrawn
- 2011-06-07 WO PCT/SE2011/050695 patent/WO2011155891A1/en active Application Filing
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6469524B1 (en) * | 2000-08-25 | 2002-10-22 | Delphi Technologies, Inc. | System and method for interrogating a capacitive sensor |
| CN1839326A (en) * | 2003-07-28 | 2006-09-27 | Ab汽车电子有限公司 | Capacitive proximity sensor |
| US20100079269A1 (en) * | 2008-09-30 | 2010-04-01 | Dirk Hammerschmidt | Capacitive detection systems and methods |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111815882A (en) * | 2020-07-21 | 2020-10-23 | 国网河南淅川县供电公司 | Alarm for outdoor power supply operation |
| CN111815882B (en) * | 2020-07-21 | 2021-08-20 | 国网河南淅川县供电公司 | Alarm for outdoor power supply operation |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20130032325A (en) | 2013-04-01 |
| BR112012030054A2 (en) | 2016-08-09 |
| RU2012157241A (en) | 2014-07-20 |
| SE1050582A1 (en) | 2011-12-08 |
| KR101496431B1 (en) | 2015-02-26 |
| EP2577867A4 (en) | 2013-12-04 |
| WO2011155891A1 (en) | 2011-12-15 |
| EP2577867A1 (en) | 2013-04-10 |
| SE538227C2 (en) | 2016-04-12 |
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Application publication date: 20130213 |