CN101726736A - Method and system for presence detection - Google Patents

Method and system for presence detection Download PDF

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Publication number
CN101726736A
CN101726736A CN200910009574A CN200910009574A CN101726736A CN 101726736 A CN101726736 A CN 101726736A CN 200910009574 A CN200910009574 A CN 200910009574A CN 200910009574 A CN200910009574 A CN 200910009574A CN 101726736 A CN101726736 A CN 101726736A
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CN
China
Prior art keywords
pulse
microwave
detection volume
control
spherical detection
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Granted
Application number
CN200910009574A
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Chinese (zh)
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CN101726736B (en
Inventor
戈兰·斯韦多夫
安德斯·安东松
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Volvo Car Corp
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Ford Global Technologies LLC
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Priority claimed from EP08166777.6A external-priority patent/EP2051099B1/en
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Publication of CN101726736A publication Critical patent/CN101726736A/en
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Publication of CN101726736B publication Critical patent/CN101726736B/en
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
    • G01S13/50—Systems of measurement based on relative movement of target
    • G01S13/52—Discriminating between fixed and moving objects or between objects moving at different speeds
    • G01S13/56—Discriminating between fixed and moving objects or between objects moving at different speeds for presence detection
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
    • G01S13/06—Systems determining position data of a target
    • G01S13/08—Systems for measuring distance only
    • G01S13/10—Systems for measuring distance only using transmission of interrupted, pulse modulated waves
    • G01S13/14—Systems for measuring distance only using transmission of interrupted, pulse modulated waves wherein a voltage or current pulse is initiated and terminated in accordance respectively with the pulse transmission and echo reception
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
    • G01S13/06—Systems determining position data of a target
    • G01S13/08—Systems for measuring distance only
    • G01S13/10—Systems for measuring distance only using transmission of interrupted, pulse modulated waves
    • G01S13/18—Systems for measuring distance only using transmission of interrupted, pulse modulated waves wherein range gates are used
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
    • G01S7/28—Details of pulse systems
    • G01S7/282—Transmitters
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
    • G01S7/28—Details of pulse systems
    • G01S7/285—Receivers
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
    • G01S7/28—Details of pulse systems
    • G01S7/285—Receivers
    • G01S7/292—Extracting wanted echo-signals
    • G01S7/2921—Extracting wanted echo-signals based on data belonging to one radar period

Abstract

The present invention relates to a method and system for presence detection within a spherical detection volume (4), delimited by an inner radius and an outer radius from a centre of the spherical detection volume (4), using an arrangement (2) for transmitting and receiving microwave radiation. The outer radius of the spherical detection volume (4) is controlled through selecting the width of a first pulse (19) for controlling a microwave transmitter (6) to transmit microwaves and through selecting the width of a further pulse (21) for controlling a microwave receiver (15) to detect microwave radiation reflected towards the centre of the spherical detection volume (4). The inner radius of the spherical detection volume (4) is controlled through selecting the width of a pulse (20) for defining a predetermined time period (LT2) pause between the first pulse (19) and the further pulse (21).

Description

There is the method and system that detects
Technical field
The present invention relates to a kind ofly be used to use the device that is used to transmit and receive microwave radiation in the method that is detected by the existence in the internal diameter of the center of this sphere detection volume and spherical detection volume that external diameter defines, this method comprises: by the described center launched microwave of microwave emitter from described spherical detection volume; Detect the microwave radiation of quilt by microwave receiver towards the described foveal reflex of described spherical detection volume; And determine in detection volume, whether there is mobile object based on the characteristic of the microwave radiation that receives by microwave receiver according to the preamble of claim 1.
In addition, the invention still further relates to a kind of being used in system by the existence control in the internal diameter of the center of this sphere detection volume and spherical detection volume that external diameter defines, this system comprises: is used for detecting by the unit that transmits and receives from the described center launched microwave of described spherical detection volume and by microwave receiver based on microwave towards the microwave radiation of the described foveal reflex of described spherical detection volume by microwave emitter, and the equipment that is used for determining in described spherical detection volume, whether to exist based on the characteristic of the microwave radiation that receives by the microwave receiver according to the preamble of claim 7 mobile object.
Background technology
Be used for detecting the system whether humans and animals exist and be well-known and be widely used in setting regions or space, for example, as intruding detection system.For example, for vehicle, use the intrusion detection device now usually to provide alarm under the situation about existing that in the passenger compartment of automobile, detects the human or animal.Like this, can expect and to reduce the stolen risk of vehicle.
The system that is used for the existence detection in the vehicle can comprise: radio-integrated transmitter and receiver based on microwave technology this means that transmitting set is arranged to microwave radiation is transmitted in the designated space corresponding with the passenger compartment of vehicle.In addition, receiver is arranged to and detects owing to any microwave radiation that exists the human or animal to reflect in this space.In order to realize this purpose, the previously known detecting unit that is to use so-called Doppler (Doppler) motion sensor type based on microwave.These unit detect the motion of humans and animals in the space based on the Doppler shift phenomenon.
About prior art, can notice that the patent documentation US 6426716 that integrates with this paper has as a reference instructed the motion sensor based on microwave transceiver equipment.This equipment comprises the length that is arranged to gating pulse, thereby part is controlled the transponder pulse maker of the scope of transceiver.
In the intrusion detection field, especially in vehicle intrusion detection device, there is following problem: only can be in the space that accurately limits, for example corresponding to detecting invasion in the distance detector accurate distance.This means that employed assembly especially for microwave receiver and transmitter, must very accurately and have high-quality, could limit sensing range with accurate way in vehicle like this.Otherwise, if just the human or animal is a risk of sending false alarm by the outside of sensing range with for example existing.Certainly, such false alarm is not expected.
Therefore, according to prior art, be difficult to provide a kind of intruding detection system of the border for sensing range with accurate qualification.This means the false alarm that may occur not expecting, this is disadvantageous.For this reason, need a kind of improved system that is arranged to accurate adjusting intrusion detection device detection boundaries on every side--to this means and to minimize or preferably eliminate false alarm--solution of still using the assembly and the circuit of relatively low cost simultaneously.
Summary of the invention
An object of the present invention is to provide a kind of improved method that detects that is used in spherical detection volume, existing, wherein can overcome above-mentioned defective, especially can realize the accurately border of qualification to sensing range, like this can be in assembly that can use relatively low cost and circuit solution, can eliminate or reduce false alarm at least.
According to a first aspect of the present invention, realize this purpose according to the characteristic of claim 1, it specifies this method further to comprise: by selecting to be used to control described microwave emitter with the width of first pulse of launching described microwave and by selecting to be used to control described microwave receiver to detect described external radius from described spherical detection volume to the width of the next pulse of the described microwave radiation of the described foveal reflex of described spherical detection volume that control; Describedly be used to control first pulse that described microwave emitter launches described microwave and be used to control the described inside radius that width that described microwave receiver detects the pulse of the preset time cycle time-out between the width of the next pulse of the microwave radiation of the described foveal reflex of described spherical detection volume is controlled described spherical detection volume by selecting to be used to be defined in described.
Another object of the present invention provides a kind of improved system that detects that is used for existing in spherical detection volume, wherein can overcome above-mentioned defective, especially can obtain the accurately border of qualification to sensing range, like this can be when using the assembly and circuit solution of relatively low cost, can eliminate or reduce false alarm at least.
According to a second aspect of the present invention, realize this purpose according to the characteristic of claim 7, it specifies this system to comprise: be used for by selecting to be used to control described microwave emitter with the width of first pulse of launching described microwave and by selecting to be used to control described microwave receiver is controlled the described external radius of described spherical detection volume to the width of the next pulse of the described microwave radiation at the described center of described spherical detection volume with detection of reflected device; Be used for describedly being used to control first pulse that described microwave emitter launches described microwave and being used to control the device that width that described microwave receiver detects the pulse of the preset time cycle time-out between the width of the next pulse of the microwave radiation of the described foveal reflex of described spherical detection volume is controlled the described inside radius of described spherical detection volume with described by selecting to be used to be defined in.
In appended claims, listed further embodiment.
By the present invention, obtain some advantage.At first, can notice, the invention provides the intrusion detection device on the border of clear qualification with detection volume.By accurately regulating the detection boundaries of sensing range in the above described manner, avoided detection fully to the circumference outside of sensing range.This has thoroughly reduced the motion of the detection boundaries outside of reporting to the police of can leading to errors usually or the influence of not motion object.
Should be understood that feature of the present invention can be any combination in conjunction with and do not depart from the scope of the present invention that defines by claim.
Description of drawings
Only, embodiments of the invention are described below with reference to the accompanying drawings as example, in the accompanying drawing:
Fig. 1 is the synoptic diagram that is equipped with according to the vehicle of device of the present invention;
Fig. 2 is the schematic block diagram that has shown according to the Design of device of the embodiment of the invention; And
Fig. 3 is the synoptic diagram that has shown the sequence that comprises a plurality of sprocket pulses, and described sequence has illustrated principle of the present invention.
From the detailed description below in conjunction with accompanying drawing, other purpose of the present invention and feature will become apparent.Yet should be appreciated that accompanying drawing only is designed for illustration purpose and is not as limitation of the invention, scope of the present invention limits should be with reference to claims.Should further understand accompanying drawing does not need to draw in proportion, unless and indication to some extent, otherwise it only means structure described herein and step conceptually is described.Identical Reference numeral will be used for illustrating the individual features of different accompanying drawings.
Embodiment
With reference to figure 1, shown the rough schematic of a part that is equipped with the vehicle 1 that has detection system in accordance with the principles of the present invention.More accurately, Fig. 1 has shown the midsection of traditional passenger vehicle 1.Shown in illustration, vehicle 1 is provided with transmitter and the acceptor unit 2 that is used to exist detection, and it preferably is set at the middle part of the passenger compartment 3 of vehicle 1.More accurately, transmitter and acceptor unit 2 are fit to for example, be arranged in the control desk on the floor that is installed to vehicle 1 between two front stall (not shown)s of vehicle.
As described in more detail below, transmitter and acceptor unit 2 comprise being arranged to microwave radiation are transmitted into microwave emitter in the passenger compartment 3.As with shown in the illustration among Fig. 1, microwave radiation is transmitted into predetermined existing in the detection volume 4, for example, have a certain size and be configured to spherical generally " bubble (bubble) " corresponding to the predetermined portions of the passenger compartment of vehicle 1, in this predetermined portions with the people's (or animal) of detected activity existence.In Fig. 1, are people showing with simplified way as reference number 5 indications.
The inside radius R that predetermined spherical detection volume 4 is begun by the center from transmitter and acceptor unit 2 residing predetermined spherical detection volume 4 IWith external radius R 0Define.
In order to realize such detection, disposing transmitter and acceptor unit 2 with reference to figure 2 and 3 modes of describing in detail.
Fig. 2 comprises microwave emitter 6 and the transmitter of relevant emitter antenna 7 and the synoptic diagram of acceptor unit 2.Microwave emitter 6 is arranged to emitter antenna 7 and presents, to send the roughly radiation in microwave range.It is known being used for having the microwave emitter of detection and the operation of receiver in given area or scope, Given this, this is not described in detail herein.The previous detecting unit based on microwave that uses is called as the Doppler motion sensor type.
Transmitter and acceptor unit 2 comprise first impulse generator 8 that is configured to a succession of pulse of generation, and each pulse all has predetermined target pulse length L T1First impulse generator 8 is connected to transmitter 6, this means that pulse is used to come according to these pulses the operation of controlled microwave transmitter 6.More accurately, microwave emitter 6 is configured to send the microwave radiation pulsegroup when each pulse is in its effective status.Equally, the first pulse length detecting device 9 is provided for for example measuring in output place of first maker 8 duration or the actual pulse length L of each pulse in these pulses A1, and be used for producing described duration of expression or actual pulse length L A1Measured value.This measured value is provided for first comparer 10.
First comparer 10 is arranged to the actual pulse length L from first impulse generator 8 A1With predetermined target pulse length L T1Compare, and be used to produce from the output of first comparer 10 and provide to the control signal of first impulse generator 8.This means, by the expression target pulse length L of first impulse generator, 8 generations T1Signal be provided for an input end of first comparer 10, and the expression actual pulse length L of measuring by the first pulse length detecting device 9 A1Signal be provided for another input end of first comparer 10.This first comparer 10 produces and the target pulse length L T1With the actual pulse length L A1Between the proportional error signal of difference, thereby and this error signal be used to produce and be sent to the suitable control signal that first impulse generator 8 is used for regulating the actual output that produces.This is intended to produce has as far as possible near predetermined target value L T1Length and the pulse of degree of accuracy with high level with the control procedure of control transmitter 6 launched microwave during time cycle with a segment length.
Predetermined target value L T1Selection depend on that predetermined sphere exists the accurate adjusting on the external detection border of detection volume 4, i.e. its external radius R 0By selecting predetermined target value L T1For example make the emission cycle will transmit external radius R at the microwave of emission corresponding to predetermined spherical detection volume 4 0Time of distance finish, can receive from radius R outside 0Interior any microwave radiation apart from reflected back.
Therefore, as shown in Figure 2, in first impulse generator 8, generated a succession of pulse, and this a succession of pulse is used to start the emission of the microwave radiation of being undertaken by transmitter 6 and associated antenna 7.Yet each also is used to trigger second impulse generator 11 by pulse that first impulse generator 8 generates, and it is corresponding will to generate a succession of second target pulse length L that has T2Second pulse.Preferably, the trailing edge of first pulse triggers each second pulse.The output of second impulse generator 11 is connected to the second pulse length detecting device 12, and its configuration is used to measure duration or the actual second pulse length L A2, and be used to produce the measured value that offers second comparer 13.
In the mode corresponding to first comparer 10, second comparer 13 is arranged to the reality second pulse length L from second impulse generator 11 A2With the second predetermined target pulse length L T2Compare, and be used for producing and the target pulse length L T2With the actual pulse length L A2Between the proportional error signal of difference, thereby and this error signal be used to produce and be sent to the suitable control signal that second impulse generator 11 is regulated the actual output that produces.At last, the desired value L that is used for second pulse length (generating) by second impulse generator 11 T2Be provided for an input end of second comparer 13, and measurement result (from the second pulse length detecting device 12) is provided for another input end of second comparer 13.
The purpose of second pulse is to form the weak point " time slot " that is right after after the microwave radiation pulsegroup of launching by transmitter 6.Predetermined target value L T2Selection depend on that predetermined sphere exists the accurate adjusting on the external detection border of detection volume 4, i.e. its inside radius R IBy selecting predetermined target value L T2For example make its corresponding to any from less than or corresponding to the inside radius R of predetermined spherical detection volume 4 IThe microwave of distance reflection return the used time of transmitter and acceptor unit 2, can reject comfortable inside radius R IInterior any microwave radiation apart from reflected back.Need so do so that eliminate by the metal object of nearly this transmitter of next-door neighbour and acceptor unit 2 and for example because contiguous transmitter and acceptor unit 2 can have the risk of the error-detecting that next-door neighbour's running that the panel of the insect of out-of-proportion high influence or vibration causes causes.
As shown in Figure 2, second pulse that generates by second impulse generator 11 also is used to trigger the 3rd other impulse generator 14.Preferably, the 3rd pulse is triggered by the trailing edge of second pulse.This means that the 3rd impulse generator 14 is arranged to and generates a series of the 3rd pulses, each the 3rd pulse all has the 3rd target pulse length L T3This 3rd pulse is used to control the microwave receiver 15 that further is associated with receiver antenna 16.
In other words, after first pulse, promptly when transmitter 6 starts, and after second pulse, the 3rd pulse is used to start receiver 15 to detect the microwave radiation of any reflection that occurs at receiver antenna 16 places after this time slot of process.
In the mode corresponding to first comparer 10 and second comparer 13, the 3rd comparer 18 is arranged to the 3rd pulse length L from the reality of the 3rd pulse generator 14 A3With the 3rd predetermined target pulse length L T3Compare, and be used for producing and the target pulse length L T3With the actual pulse length L A3Between the proportional error signal of difference, thereby and this error signal be used to produce and be sent to the suitable control signal that the 3rd impulse generator 14 is regulated the actual output that produces.For this reason, the desired value L that is used for the 3rd pulse length T3Be provided for an input end of the 3rd comparer 18, and be provided for another input end of the 3rd comparer 18 from the measurement result of the 3rd pulse length detecting device 17 (being connected to the output terminal of the 3rd impulse generator 14).
Predetermined target value L T3Selection depend on that further predetermined sphere exists the accurate adjusting on the external detection border of detection volume 4, i.e. its external radius R 0By selecting predetermined target value L T3For example make receiving cycle will receive at transmitter and acceptor unit 2 places from emission cycle last time from external radius R corresponding to predetermined spherical detection volume 4 0The time place of any microwave of distance reflection finish, can reject from radius R outside 0Outside any microwave radiation apart from reflected back.
Therefore, when adopting the microwave radiation (occurring in the 3rd impulse duration) of receiver 15 detection of reflected, microwave radiation is received by described receiver 15.Receiver 15 is connected to be arranged to and determines whether and will detect the testing circuit (not shown) of existence.As mentioned above, such detection was known in the past equally, and can be based on by the detection that is used for determining whether to have in sensing range 4 based on the characteristic of the microwave radiation that is received the Doppler effect (Doppler effect) that the moving object of any existence produces.Depend on Doppler effect and detect, can filter out any reflection that produces from stationary object.
According to select three different target pulse length L in the size that has the sensing range 4 between the detection period demand relevant with required degree of accuracy T1, L T2, L T3This means, can dispose these desired values according to the type of vehicle that system was suitable for.But this has just considered the intrusion detection device that can be used for the common configuration of dissimilar vehicles easily.
Further set forth principle of the present invention referring now to Fig. 3, Fig. 3 has shown the sequential that comprises aforesaid first pulse 19, second pulse 20 and the 3rd pulse 21.As mentioned above, first pulse 19 has the first predetermined target length L T1, this length is transmitted into duration of spherical detection volume 4 corresponding to microwave radiation, that is and, the microwave of emission has transmitted the external radius R corresponding to spherical detection volume 4 0Distance.
When first pulse 19 stops, as mentioned above, will start second pulse 20 by aforesaid second impulse generator 11.This second pulse 20 constitutes corresponding to stopping up to any for example by the inside radius R of spherical detection volume 4 since first pulse 19 IWith external radius R 0Between sensing range in the microwave radiation of people 5 reflection can expect to be reflected and arrive the pulse of the specified time interval of receiver antenna 15.When second pulse 20 stops, start the 3rd pulse 21, it is corresponding to the startup of microwave receiver 15.In this stage, the inside radius R that can detect in spherical detection volume 4 IWith external radius R 0Between sensing range in any existence of generation.
As mentioned above, by pulse length detecting device 9,12,17 and three pulses 19,20,21 of comparer 10,13,18 controls.These control circuits are guaranteed the target pulse length L with pinpoint accuracy T1, L T2, L T3Be maintained its desirable value.
Duration of transmission interval (i.e. the duration of first pulse 19) and reception termination (i.e. the termination of the 3rd pulse 21) have at interval been determined from detecting device R 0How far can detect.The duration (i.e. the duration of second pulse 20) that emission/reception is ended, and i.e. the 3rd pulse 21 in reception at interval the position relevant with the transmission interval of first pulse 19 is determined near assay intervals R I
Have the possibility that accurate setting transmits and receives at interval and make it possible to very accurately control outside R 0With near R IDetection boundaries, i.e. the inside radius R of detection volume 4 IWith external radius R 0
The present invention has than high tolerance by using in impulse generator separately based on the comparer of regulating loop, is subjected to temperature, aging and its dependent variable to influence littler assembly, this means use assembly more cheaply.Can still can realize between detection period realizing above-mentioned advantage in the pinpoint accuracy very much existing according to the present invention.Do not have the present invention, realize that better degree of accuracy just needs higher cost ground to select low tolerance assembly, perhaps the variation of supplier's standard technology and assembly will have very big influence to this system.
The present invention is not limited to the foregoing description, but can make amendment under the situation of the scope that does not break away from following claim.For example, the present invention can be used for various types of vehicles, for example, and the vehicle and the ship of carrying truck, motorbus, steamer or other types.
The present invention can be used for the intrusion detection for vehicle (such as automobile and truck or the restriceted envelope or the zone of any kind usually, that is, sensing range).Equally, the present invention can be used for that indoor and outdoors is reported to the police, industrial robot control, home automation control, the detection that is used for when the someone enters the room, turning on light, door opener and needs are reliable and other application of detection human or animal's the existence in sensing range of saving cost automatically.
Ultimate principle of the present invention is, transmitter by on-off pulsedly to be created in the short pulse group in the microwave range with certain pulses repetition frequency (PRF) with radio energy.Receiver is also intermittently beated receiving the microwave radiation from an interested target reflection, but only during certain time interval of determining relatively with the effective status of transmitter.
In addition, also envisioned a kind of system that is used for the existence control in spherical detection volume 4 according to the present invention, this sphere detection volume is by the radius R from the center of spherical detection volume 4 IWith external radius R 0Define.This system comprises being used for detecting from the center launched microwave of spherical detection volume 4 and by microwave receiver 15 by microwave emitter 6` and transmits and receives unit 2 to the microwave radiation of the foveal reflex of spherical detection volume 4 based on microwave.This system further comprises the device that is used for determining based on the characteristic of the microwave radiation that is received by microwave receiver 15 existence of the moving object in the spherical detection volume 4.In addition, device is provided for the width of first pulse 19 by selecting to be used for controlled microwave transmitter 6 launched microwaves and detects external radius from spherical detection volume 4 to the width of the next pulse 21 of the microwave radiation of the foveal reflex of spherical detection volume 4 that controlled by selecting to be used for controlled microwave receiver 15.Device also is provided for by selecting to be used to be defined in first pulse 19 that is used for controlled microwave transmitter 6 launched microwaves and be used for controlled microwave receiver 6 to detect the preset time period L of quilt between next pulse 21 of the microwave radiation of the foveal reflex of spherical detection volume 4 T2The width of the pulse 20 that suspends is controlled the inside radius of spherical detection volume 4.
Therefore, can envision a kind of system that has device that is used to carry out aforesaid all method steps that provides.
According to the present invention, also can envision a kind of motor vehicles that comprise the system that is used for aforesaid existence control.
Not breaking away under the scope of the present invention that is defined by the following claims aforesaid multiple modification of the present invention is possible.
Be used for describing and advocate that expression of the present invention for example " comprises ", " comprising ", " mergings ", " by ... composition ", " having " and "Yes" should explain in non-exclusive mode, promptly considers project, parts or the element that also can occur not clearly stating.The odd number that relates to also can be interpreted as relevant for a plurality of, and vice versa.
Numeral in the bracket in accessory claim is used for the understanding of auxiliary claim and should explain the theme of being advocated by these claims with restriction by any way.
Therefore, although show, describe and point out to be applied to the main novel features of the preferred embodiments of the present invention here, will be appreciated that those skilled in the art can make multiple in form with the details of device of explanation on multiple omission and displacement.For example, should know clearly that carrying out these elements and/or the described of method step that essentially identical function reaches essentially identical effect with essentially identical method is combined within the scope of the invention.And, should be familiar be the structure that shows together with any open form of the present invention or embodiment and/or describe and/or element and/method step can any other form disclosed or that describe or suggestion or embodiment merge General Result as design alternative.Therefore, only mean that the scope by additional claim limits here.

Claims (9)

1. there is the method for detection in the use device (2) that is used to transmit and receive microwave radiation in predetermined spherical detection volume (4), described spherical detection volume is defined by the inside radius and the external radius at the center of the described spherical detection volume of distance (4), and described method comprises:
By the described center launched microwave of microwave emitter (6) from described spherical detection volume (4);
Come the microwave radiation of detection of reflected by microwave receiver (15) to the described center of described spherical detection volume (4); And
Characteristic based on the described microwave radiation that is received by described microwave receiver (15) determines whether there is mobiles in described spherical detection volume (4);
It is characterized in that described method also comprises:
By selecting to be used to control described microwave emitter (6) with the width of first pulse (19) of launching described microwave and by selecting to be used to control described microwave receiver (15) to detect described external diameter from described spherical detection volume (4) to the width of the next pulse (21) of the described microwave radiation of the described foveal reflex of described spherical detection volume (4) that control;
Detect the preset time period L of quilt between next pulse (21) of the described microwave radiation of the described foveal reflex of described spherical detection volume 4 by selecting to be used to be defined in be used to control first pulse (19) of the described microwave of described microwave emitter (6) emission and be used to control described microwave receiver (15) T2The width of the pulse (20) that suspends is controlled the described internal diameter of described spherical detection volume (4).
2. method according to claim 1 is characterized in that it comprises:
Control described microwave emitter (6) by a sequence first pulse (19) and launch described microwave, each pulse in a described sequence first pulse (19) all has the first predetermined pulse length L T1And generate by first impulse generator (8);
Control the microwave radiation that described microwave receiver (15) detects described reflection by a sequence next pulse (21), each pulse in the described sequence next pulse (21) all has predetermined pulse length L T3Generate by the 3rd impulse generator (14);
At each described first pulse (19) predetermined period of time L afterwards T2, control described the 3rd pulse producer (14) and produce each described next pulse (21).
3. method according to claim 1 and 2 is characterized in that it comprises: handle to determine whether there is moving object in described spherical detection volume (4) by the Doppler motion sensor.
4. method according to claim 3 is characterized in that it comprises:
Control the length of described first pulse (19) by the first pulse length detecting device (9); And
Control the length of described next pulse (21) by next pulse length detection device (17).
5. method according to claim 4 is characterized in that it comprises:
The measurement result that obtains by the described first pulse length detecting device (9) is provided, and described measurement result is provided for the first target pulse length L T1First comparer (10) of control; And
The measurement result that obtains by the described first next pulse length detection device (17) is provided, and described measurement result is provided for other target pulse length L T3The other comparer (18) of control.
6. according to each described method in the aforementioned claim, it is characterized in that it comprises:
Limit described predetermined period of time L by connecting with the extra-pulse length maker (11) that triggers described next pulse maker (14) to be triggered by described first impulse generator (8) and further to connect T2
7. system that is used in spherical detection volume (4), existing control, described spherical detection volume is defined by the inside radius and the external radius at the center of the described spherical detection volume of distance (4), and described system also comprises:
Be used for detecting from the described center launched microwave of described spherical detection volume (4) and by microwave receiver (15) and transmit and receive unit (2) based on microwave to the microwave radiation of the described foveal reflex of described spherical detection volume (4) by microwave emitter (6); And
Be used for determining in described spherical detection volume (4), whether to exist the device of mobiles based on the characteristic of the microwave radiation that receives by described microwave receiver (15);
It is characterized in that described system comprises:
Be used for the width of first pulse (19) by selecting to be used to control the described microwave of described microwave emitter (6) emission and by selecting to be used to control described microwave receiver (15) detection of reflected is controlled device from the described external radius of described spherical detection volume (4) to the width of the next pulse (21) of the described microwave radiation at the described center of described spherical detection volume (4); And
Detect the preset time period L of quilt between the described next pulse (21) of the described microwave radiation of the described foveal reflex of described spherical detection volume (4) by selecting to be used to be defined in be used to control described first pulse (19) of the described microwave of described microwave emitter (6) emission and be used to control described microwave receiver (15) T2The width of the pulse (20) that suspends is controlled the device of the described internal diameter of described spherical detection volume (4).
8. the system that is used to exist control according to claim 7 is characterized in that, also comprises:
Be used for controlling described microwave emitter (6) to launch the device of described microwave by a sequence first pulse (19), each pulse in a described sequence first pulse (19) all has the first predetermined pulse length L T1And generate by first impulse generator (8);
Be used for controlling the device of described microwave receiver (15) with the microwave radiation that detects described reflection by a sequence next pulse (21), each pulse in the described sequence next pulse (21) all has predetermined pulse length L T3And generate by the 3rd impulse generator (14);
Be used at each described first pulse (19) predetermined period of time L afterwards T2Control described the 3rd pulse producer (14) to produce the device of each described next pulse (21).
9. motor vehicles is characterized in that, comprise a kind of according to claim 7 and 8 each described systems that are used to exist control.
CN200910009574.4A 2008-10-16 2009-02-23 Method and system for presence detection Active CN101726736B (en)

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EP08166777.6 2008-10-16

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