CN105717510A - Automobile ultrasonic detecting method and sensor - Google Patents
Automobile ultrasonic detecting method and sensor Download PDFInfo
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- CN105717510A CN105717510A CN201610122774.0A CN201610122774A CN105717510A CN 105717510 A CN105717510 A CN 105717510A CN 201610122774 A CN201610122774 A CN 201610122774A CN 105717510 A CN105717510 A CN 105717510A
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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
- G01S15/00—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
- G01S15/88—Sonar systems specially adapted for specific applications
- G01S15/93—Sonar systems specially adapted for specific applications for anti-collision purposes
- G01S15/931—Sonar systems specially adapted for specific applications for anti-collision purposes of land vehicles
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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
- G01S15/00—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
- G01S15/88—Sonar systems specially adapted for specific applications
- G01S15/93—Sonar systems specially adapted for specific applications for anti-collision purposes
- G01S15/931—Sonar systems specially adapted for specific applications for anti-collision purposes of land vehicles
- G01S2015/932—Sonar systems specially adapted for specific applications for anti-collision purposes of land vehicles for parking operations
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- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Computer Networks & Wireless Communication (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
Abstract
The invention discloses an automobile ultrasonic detecting method and a sensor.The automobile ultrasonic detecting method specifically comprises the steps that a plurality of microphones in the sensor are controlled to work in cooperation, wherein part of microphones are only used for receiving echo signals which are used for system recognition and judgment.The ultrasonic sensor has excellent close-range detecting performance, is extremely small in blind area and greatly improves the safety of parking when serving as a backing sensor.The automobile ultrasonic detecting method and the sensor have extremely-broad prospects when applied to automobiles; by promoting and accelerating the application and popularization of the high-performance senor and the detecting method, great economic benefits can be obtained, the driving safety of automobiles can be further improved at the same time, and positive significance is achieved.
Description
Technical field
The present invention relates to a kind of automobile ultrasonic method for detecting and sensor.
Background technology
Ultrasonic sensor utilization on automobile is increasingly to popularize, the radar for backing car being such as commonly called as onboard, namely parking assisting system before and after, by after being arranged in car and the ultrasonic sensor of Herba Plantaginis surrounding enviroment before and after automobile are detected, differentiate object, cleaning blind area, employing is ultrasonic detection technology, and sensor used is ultrasonic sensor.
At present, automobile newly increasing semiautomatic parking system or the automated parking system (being hereafter referred to collectively as automated parking system) of utilization, it is also by ultrasonic sensor, surrounding is detected, and finds with automatic parking sensor, identifies parking stall.Automobile blind spot monitoring system (or claiming automobile blind spot aid system) used on current partial automobile, what be also adopted by is ultrasonic detection technology, its by blind-spot sensors to vehicle right and left track exterior mirror not it is observed that region, blind area detect, to assist driver's lane change, driving.
As it is shown in figure 1, be provided with park sensor 16,13(be also commonly called as reversing radar sensor), be respectively arranged diverse location after Herba Plantaginis, car, before number of probes be generally 4 or 2, after number of probes be generally 4 or 3, or 2.The usual car of blind-spot sensors 11,12 is left back and car right after each arrange 1.On the left of the usual Herba Plantaginis of automatic parking sensor 14,15,17,18, on the right side of Herba Plantaginis, after car, after left side, car, right side is each arranges 1；Automatic parking sensor 14,15 also serves as the aiding sensors of ultrasound wave blind monitoring system simultaneously, and part automated parking system only has two automatic parking sensors 14,15, it does not have arrange automatic parking sensor 17,18.
The sensor used on current automobile, such as sensor 16,13 of parking, blind-spot sensors 11,12, automatic parking sensor 14,15,17,18, is all traditional ultrasonic sensor.Because sensor language function is different, it is therefore different to the detection performance required by various sensors.Require in detecting response speed, reversing radar sensor (sensor 16,13 of parking), because being all vehicle starting, park, use of stopping, therefore that the response speed requirement of sensor is relatively low.Blind-spot sensors 11,12, because using (comprising at a high speed) in vehicle traveling process, therefore requires relatively high to the response speed of sensor.Automatic parking sensor 14,15,17,18,14,15 also serves as blind monitoring system supplymentary sensor, and therefore it all needs effect in middle low speed, high speed, therefore require of a relatively high to its response speed.
The detecting ability of sensor, generally with sensor, the PVC water pipe of diameter 75MM is (following, the PVC water pipe of diameter 75MM is referred to as par) carry out detecting (iso standard), farthest detecting distance is then the maximum detecting ability of sensor, the detecting ability of sensor is more strong, the farthest detecting distance of par is more big, and the detecting ability of sensor is more weak, and the farthest detecting distance of par is then more little.
In the detecting ability of sensor, sensor 16,13 of parking is as closely detecting utilization, and therefore the detecting Capability Requirement of sensor is relatively low, generally, the range distance of sensor is set to about 2.5M, to par about 2M can measure then can, the requirement of system can be met.
Blind-spot sensors 11,12 is as the vehicle of blind area, track, automobile outer rear-view mirror left and right carries out detecting needs, therefore the remote detecting Capability Requirement of sensor is of a relatively high, the range distance of usual sensor is set to 4-6 rice, and par is measured at 4-5M required distance.
Automatic parking sensor 14,15,17,18 is detected as parking stall ambient condition, is identified use, and therefore the remote detecting Capability Requirement of sensor is of a relatively high, and the range distance of usual sensor is set to 4-6 rice, and par is measured at 4-5M required distance.
Remote detecting ability and detecting response speed are of paramount importance two performance indications of ultrasonic sensor.
Blind-spot sensors 11,12, automatic parking sensor 14,15,17,18 is because the remote detection performance of traditional sensors itself is limited, although the range distance of sensor is set to 5 meters, but sensor is difficult to the par detecting distance at 4-5M place, it is typically only capable to detect at about 3M, just being difficult to more than 3.5M, the remote detecting ability of this that is traditional sensors is strong not.Detecting ability is inadequate, has just been difficult to, has realized blind monitoring function and the automatic parking function of automobile, even if achieving in other words, but the performance of blind monitoring system, automated parking system can be relatively low.
One important performance indications of ultrasonic sensor are the blind areas of sensor self.Sensor blind area is more little, its more can measure from sensor closer to par (object), representing it, closely to detect ability more good.
Illustrating as follows: Fig. 2, par has certain distance (LG1) from sensor, and now, it can be seen that echo-signal SA-10a has regular hour distance with launching remained shock signal TA-10a from clock signal Figure 15, both do not have overlap, are absent from mixing interference.
If the distance of sensor and par progressively reduces, so echo-signal SA-10a can be progressively close with transmitting remained shock signal TA-10a, when the distance of sensor Yu par is contracted to blind area distance value (being set to LB), detecting schematic diagram such as Fig. 9, that now echo-signal SC-10a with launch remained shock signal TC-10a(TC-10a and TA-10a actually same) have started to overlapping, mixing interference occurs, clock signal figure such as Figure 10, now, sensor can not be differentiated, criterion of identification bar, and distance LB now is we term it the blind area of sensor.At present, traditional ultrasonic sensor, blind area value LB is generally 15-25CM.Namely from sensor distance object within the value scope of blind area, sensor can not effectively detect and identify distance.
Self there is blind area in ultrasonic sensor, cause that parking radar system is when stopping, if there is small objects or the weak object of reflectance in blind area, such as electric pole, roadblock ball pier, child etc., because parking radar system can not effectively detect and carry out alarm, it is possible to cause the security incident that collides.Sensor 16,13 as it is shown in figure 1, park, blind-spot sensors 11,12 and automatic parking sensor 14,15,17,18 vehicle starting, stop as park sensor effect time, then their blind area value is more little, the blind area of system is more little, and systems scan performance is more good, and safety is more high.
For sensor self blind zone problem, ameliorative way conventional at present is: one, microphone (also referred to as visiting core) adopts different gauge material to reduce the transmitting remained shock time, reduce blind area, two, reduce the sensor electronics driving power to microphone, reduce driving time, or the own power of reduction microphone, reduce and launch remained shock time value, to reduce blind area；Or other similar means.But these means, method, be all difficult to be greatly decreased so that the blind area value of sensor, within such as making the blind area value of sensor be reduced to 10CM.Simultaneously; the farthest detecting ability of current ultrasonic sensor is usually restriction mutually with detecting ability (blind area value) the two performance indications recently; we are when obtaining less blind area value; the remote detecting ability of sensor would generally be sacrificed, therefore also lead to ultrasonic sensor and be subject to bigger utilization restriction when blind area value performance indications are improved.
Summary of the invention
For prior art Problems existing, it is an object of the invention to provide a kind of structure through improving, reaching the automobile ultrasonic method for detecting that self blind area value is sufficiently small, it is a further object of the present invention to provide a kind of automobile ultrasonic sensor implementing said method.
For achieving the above object, one automobile ultrasonic method for detecting of the present invention, particularly as follows: several microphone collaborative works controlled in sensor, wherein, part microphone is served only for receiving echo-signal, and the echo-signal of its reception is used for the identification of system, judgement.
Further, the work process of several described microphones is:
1) several described microphones are divided into for launching microphone, receiving microphone；
2) launching microphone, the t0 moment launches ultrasound wave；
3) receiving microphone, the t0 moment starts to receive ultrasound wave, does not launch ultrasound wave；
4) receive microphone and receive echo-signal produced by transmitting microphone, complete single detecting in the t0+T moment；
Receive microphone channel and do not launch remained shock signal, do not produce mixing interference, significantly reduce the detecting blind area of ultrasonic sensor with this.
A kind of automobile ultrasonic sensor implementing said method of the present invention, including several microphones and electronic circuit cell, this electronic circuit cell controls part microphone and is served only for receiving echo-signal, and the echo-signal of its reception is used for the identification of system, judgement.
Further, being provided with two microphones in described sensor: microphone A, microphone B, wherein, microphone A is used for launching ultrasound wave, and microphone B does not launch ultrasound wave and is served only for receiving echo-signal.
Further, described microphone A, microphone B are combined into one structure.
Further, described sensor also includes casing assembly unit and the gum cover unit being mounted within, and casing assembly unit is provided with connector unit.
Further, described microphone is fixedly installed in described casing assembly unit by gum cover unit, and described connector unit is the external hardware interface of described sensor, and described sensor externally transmits signal by described connector unit.
Further, described microphone is driven and echo-signal is amplified, filters by described electronic circuit cell, calculation process, to draw detecting distance.
Further, integrally disposed in described electronic circuit cell have some groups of ultrasonic emitting modules and ultrasound wave receiver module, and one group of ultrasonic emitting module, ultrasound wave receiver module control its work corresponding to a described microphone.
Further, integrally disposed in described electronic circuit cell have single-chip microcomputer.
Further, integrally disposed in described electronic circuit cell have power module and communication module, and described sensor externally carries out signal transmission by described communication module.
Further, described covers disposed on sensor is equipped with 3 pins for external connection: pin PIN1, pin PIN2 and pin PIN4, or is provided with 4 pins: pin PIN1, pin PIN2, pin PIN3 and pin PIN4；Wherein, at described sensor internal, pin PIN1 is connected with described power module, and pin PIN4 is earth terminal, and pin PIN2 is connected with described communication module, or pin PIN2, pin PIN3 are connected with described communication module respectively.
Further, when described sensor monitors the utilization of system blind spot detection sensor as automobile blind spot, described sensor and automobile reflector are set to one.
When ultrasonic sensor of the present invention uses as car backing sensor, it has fabulous closely detection performance, and blind area is minimum, substantially increases the safety parked.Utilization on automobile, has extremely wide prospect, promotes, accelerates popularization and the utilization of high-performance sensors of the present invention and method for detecting, will obtain bigger economic benefit, also will further improve the driving safety of automobile simultaneously, have positive meaning.
Accompanying drawing explanation
Fig. 1 is that automobile ultrasonic sensor arranges schematic diagram；
Fig. 2 be traditional sensors adjust the distance LG1 par detecting schematic diagram；
Fig. 3 is the sensor construction axonometric chart arranging two microphones；
Fig. 4 is the end view of the sensor arranging two microphones；
Fig. 5 is the sensor construction schematic diagram arranging two microphones；
Fig. 6 is the sensor construction schematic diagram arranging three microphones；
Fig. 7 is the sensor construction schematic diagram arranging four microphones；
Fig. 8 is the sensor construction schematic diagram arranging six microphones；
Fig. 9 be traditional sensors adjust the distance LB par detecting schematic diagram；
Figure 10 is that traditional sensors is adjusted the distance LB par work of detection and examination clock signal schematic diagram；
Figure 11 be inventive sensor adjust the distance LB par detecting schematic diagram
Figure 12 is that inventive sensor is adjusted the distance LB par work of detection and examination clock signal schematic diagram；
Figure 13 is the internal theory diagram of inventive sensor；
Figure 14 is that blind-spot sensors arranges schematic diagram with reflector assembly；
Figure 15 is that traditional sensors is adjusted the distance LG1 par work of detection and examination clock signal schematic diagram；
Figure 16 is that a kind of automobile ultrasonic sensor arranges schematic diagram one；
Figure 17 is that a kind of automobile ultrasonic sensor arranges schematic diagram two；
Figure 18 is that a kind of automobile ultrasonic sensor arranges schematic diagram three.
Detailed description of the invention
Below, with reference to accompanying drawing, the present invention is more fully illustrated, shown in the drawings of the exemplary embodiment of the present invention.But, the present invention can be presented as multiple multi-form, is not construed as the exemplary embodiment being confined to describe here.And it is to provide these embodiments, so that the present invention is fully and completely, and will fully convey the scope of the invention to those of ordinary skill in the art.
For ease of illustrating, here can use such as " on ", the space relative terms such as D score " left side " " right side ", be used for shown in figure a element or the feature relation relative to another element or feature is described.It should be understood that except the orientation shown in figure, spatial terminology is intended to include device different azimuth in use or operation.Such as, if the device in figure is squeezed, be stated as the element being positioned at other elements or feature D score will be located into other elements or feature " on ".Therefore, exemplary term D score can comprise upper and lower both orientation.Device can otherwise position (90-degree rotation or be positioned at other orientation), relatively illustrates used herein of space correspondingly to explain.
One automobile ultrasonic method for detecting of the present invention, particularly as follows: several microphone collaborative works controlled in sensor, wherein, part microphone is served only for receiving echo-signal, and the echo-signal of its reception is used for the identification of system, judgement.
One automobile ultrasonic method for detecting of the present invention, is directed to multiple microphone, its method step particularly as follows:
1) several described microphones are divided into for launching microphone, receiving microphone；
2) launching microphone, the t0 moment launches ultrasound wave；
3) receiving microphone, the t0 moment starts to receive ultrasound wave, does not launch ultrasound wave；
4) receive microphone and receive echo-signal produced by transmitting microphone, complete single detecting in the t0+T moment；
Receive microphone channel and do not launch remained shock signal, do not produce mixing interference, significantly reduce the detecting blind area of ultrasonic sensor with this.
As shown in Figures 3 to 8, a kind of automobile ultrasonic sensor implementing said method of the present invention, including several microphones, casing assembly unit, gum cover unit, electronic circuit cell, connector unit.Integrally disposed in electronic circuit cell have single-chip microcomputer, power module, communication module and some groups of ultrasonic emitting modules, ultrasound wave receiver modules.
Microphone is fixedly installed in casing assembly unit by gum cover unit, and microphone is driven and echo-signal is amplified, filtering by electronic circuit cell, calculation process, to draw detecting distance；External signal is transmitted by sensor by connector unit.
Being provided with some groups of ultrasonic emitting modules, ultrasound wave receiver module in electronic circuit cell, one group of ultrasonic emitting module, ultrasound wave receiver module control its work corresponding to a microphone.Further, several microphones and other assemblies are all combined into one structure, to form complete, an independent ultrasonic sensor.
As shown in figure 13, automobile ultrasonic sensor of the present invention is provided with 3 pins for external connection or 4 pins, 3 pins: pin PIN1, pin PIN2 and pin PIN4；4 pins: pin PIN1, pin PIN2, pin PIN3 and pin PIN4.PIN2, PIN3 are connected with communication module, but when practice, sensor is likely to and is only communication foot (not needing 2).Therefore, at sensor internal, pin PIN1 is connected with described power module, and pin PIN4 is earth terminal, and pin PIN2 is connected with communication module, or pin PIN2, pin PIN3 are connected with described communication module respectively.
Fig. 3, Fig. 4, Fig. 5 are the automobile ultrasonic sensor being provided with two microphones, Fig. 6 is the automobile ultrasonic sensor being provided with three microphones, Fig. 7 is the automobile ultrasonic sensor being provided with four microphones, and Fig. 8 is the automobile ultrasonic sensor being provided with six microphones.
To be provided with two microphones shown in Fig. 3, Fig. 4, it is described as follows:
Automobile ultrasonic sensor of the present invention, including microphone 20a1, microphone 20a2, silica gel sheath unit 20b1, silica gel sheath unit 20b2, electronic circuit cell 20d, connector unit 20e, casing assembly unit 20c(containing possible filling glue).Wherein, silica gel sheath unit 20b1, silica gel sheath unit 20b2 can be designed to integrative-structure according to architectural feature.
Silica gel sheath unit 20b1, silica gel sheath unit 20b2 provide protection and cushioning effect for microphone.Connector unit 20e realizes the hardware linkage function such as probe power supply, data transmission, and provides integral installation support and protection together with casing assembly unit 20c for sensor.Each unit assemble become one, formed sensor, usual sensor adopt fill glue carry out embedding, with realize water-proof function (operative sensor then directly utilize casing assembly carry out structural formula seal reach water-proof function, do not adopt filling glue carry out embedding).
Being provided with two microphones in Fig. 3: microphone 20a1, microphone 20a2, the internal circuit of sensor is also provided with two sets corresponding to microphone 20a1 and microphone 20a2 accordingly and drives, receives, amplifies the interlock circuit modules such as filtering, computing.Microphone 20a1, microphone 20a2 adopt same size.
Electronic circuit cell 20d does not simultaneously drive two microphones and launches ultrasound wave, but drives a microphone to launch, and does not drive another but receives echo-signal with another microphone.Such as Figure 11, closely par is detected by two microphone sensors, sensor electronics unit 20d drives microphone 20a1 to launch ultrasound wave, microphone 20a2 is not driven to launch ultrasound wave, keep microphone 20a2 only to receive reflection echo, and the echo-signal that microphone 20a2 receives is for the identification of system, judgement.Therefore microphone 20a1 passage has transmitting remained shock signal, and 20a2 microphone channel does not launch remained shock signal, and clock signal is Figure 12 such as.Now, when the par being detected enters traditional sensors blind area scope, par still can be identified, detect by microphone 20a2 passage, draws distance.Therefore, the present invention adopts innovative design mode, two microphones or many microphones sensor can detection distance closer to object, it is possible to the blind area of sensor is greatly decreased, within blind area value is contracted to 5CM, sensor blind area can be made in theory to level off to zero.
The present invention adopts a microphone to launch, the mode that another microphone receives, it is possible to making blind area value minimizing level off to zero to several centimetres, therefore blind area significantly reduces.So, when the small objects that sensor of adjusting the distance is close carries out detecting identification, there is effect clearly, this be traditional sensors detected less than, inventive sensor applies to tradition reverse radar system, then the blind area of reverse radar system will significantly reduce, and substantially increase the safety of system.
In addition, ultrasound wave automobile blind spot monitoring system traditional at present, see Fig. 1, the wherein blind-spot sensors 11 of conventional ultrasonic wave, 12, inherent character because of ultrasonic sensor, when remote detecting ability strengthens, the blind area of sensor will strain greatly mutually, therefore more ultrasound wave blind monitoring system, when vehicle backing, because blind area is excessive, blind-spot sensors causes that it can not double as radar for backing car (parking radar) sensor and use, but adopt the blind-spot sensors of innovative design mode of the present invention, when reversing, sensor blind area can be made minimum, thus can use as two jiaos, left and right after car position reversing (parking) sensor, such design, the utilization quantity of reversing radar sensor after car can be reduced.
Such as Figure 16, former car car backing sensor 13 quantity reduces to three, and during reversing, 11,12 and three car backing sensors 13 of blind-spot sensors work together as car backing sensor；Such as just like Figure 17, former car car backing sensor 13 quantity reduces to two, during reversing, blind-spot sensors 11,12 works for car backing sensor together with two car backing sensors 13, decrease one or two car backing sensor, reduce system cost, but also ensure that simultaneously and even improve the performance of radar for backing car after car.Simultaneously, part vehicle, backup camera is installed after car, vehicle only respectively arranges a traditional car backing sensor the tailstock two jiaos and when reversing, photographic head both sides blind sector is detected, this situation, if vehicle is equipped with the blind monitoring system adopting the present invention program sensor, blind-spot sensors 11 during that reversing, 12 can use as two jiaos of car backing sensors of the tailstock, so, not only save two traditional reversing radar sensors 13, it is important that, when the present invention program blind-spot sensors uses as car backing sensor, it has fabulous closely detection performance, blind area is minimum, substantially increase the safety of reversing；Now, transducer arrangements can be such as Figure 18.
As shown in figure 14, inventive sensor as automobile blind spot monitor system blind spot detection sensor use time, sensor and automobile reflector 10(reflecting piece) be set to one.That is: left two microphones or many microphones blind-spot sensors are set to one with left reflector, make left set of part (little total member), right two microphones or many microphones blind-spot sensors are set to one with right reflector, make right assembly, then left and right assembly is mounted on automobile rear bumper again.
This arranges form and has the advantage that one, and blind-spot sensors and reflector are equipped with and are integrated, it appears each microphone is more hidden, so that overall appearance is attractive in appearance after car.If two microphones or the direct mounting arrangements of many microphones blind-spot sensors are in bumper, because must the microphone quantity that exposes of outer surface many, sensor is relatively big, and two microphones or many microphones sensor can be made to seem to seem excessively prominent on bumper, less graceful.Two, by the adjustment of assembly own form, structure, assembly is the adjustment of position, angle on bumper so that sensor is easily selected onboard, obtained layout orientation more preferably and angle, thus obtaining detection performance more preferably.Blind-spot sensors is directly mounted on the mode on bumper, then lack such adjustment degree of freedom, it is achieved get up relatively difficult.Three, bumper color has a variety of, and blind-spot sensors and reflector are equipped with and are integrated, it is possible to greatly reduces the color category of spray paint needed for sensor appearance, only needs one or two kind and mate good color with reflector.If but the direct mounting arrangements of sensor is on bumper, for making sensor outer surface keep the color the same with vehicle body, then need a variety of coloured paint, so that processing trouble, cost increase.
Simultaneously, automobile ultrasonic method for detecting of the present invention and sensor, except being used on usually said automobile, on the vehicle can also be used in all kinds of kinds such as tricycle, motorcycle, tricycle for the disabled, electric bicycle, varying in size, as adopted automobile ultrasonic method for detecting of the present invention and sensor, broadly fall into the scope that the present invention contains.
Claims (13)
1. an automobile ultrasonic method for detecting, it is characterised in that the method is particularly as follows: several microphone collaborative works of controlling in sensor, and wherein, part microphone is served only for receiving echo-signal, and the echo-signal of its reception is used for the identification of system, judgement.
2. automobile ultrasonic method for detecting as claimed in claim 1, it is characterised in that the work process of several described microphones is:
1) several described microphones are divided into for launching microphone, receiving microphone；
2) launching microphone, the t0 moment launches ultrasound wave；
3) receiving microphone, the t0 moment starts to receive ultrasound wave, does not launch ultrasound wave；
4) receive microphone and receive echo-signal produced by transmitting microphone, complete single detecting in the t0+T moment；
Receive microphone channel and do not launch remained shock signal, do not produce mixing interference, significantly reduce the detecting blind area of ultrasonic sensor with this.
3. an automobile ultrasonic sensor, it is characterised in that include several microphones and electronic circuit cell, this electronic circuit cell controls part microphone and is served only for receiving echo-signal, and the echo-signal of its reception is used for the identification of system, judgement.
4. automobile ultrasonic sensor as claimed in claim 3, it is characterized in that, described sensor is provided with two microphones: microphone A, microphone B, wherein, microphone A is used for launching ultrasound wave, and microphone B does not launch ultrasound wave and is served only for receiving echo-signal.
5. automobile ultrasonic sensor as claimed in claim 4, it is characterised in that described microphone A, microphone B are combined into one structure.
6. automobile ultrasonic sensor as claimed in claim 4, it is characterised in that described sensor also includes casing assembly unit and the gum cover unit being mounted within, and casing assembly unit is provided with connector unit.
7. automobile ultrasonic sensor as claimed in claim 6, it is characterized in that, described microphone is fixedly installed in described casing assembly unit by gum cover unit, and described connector unit is the external hardware interface of described sensor, and described sensor externally transmits signal by described connector unit.
8. automobile ultrasonic sensor as claimed in claim 3, it is characterised in that described microphone is driven and echo-signal is amplified, filters by described electronic circuit cell, calculation process, to draw detecting distance.
9. automobile ultrasonic sensor as claimed in claim 3, it is characterized in that, integrally disposed in described electronic circuit cell have some groups of ultrasonic emitting modules and ultrasound wave receiver module, and one group of ultrasonic emitting module, ultrasound wave receiver module control its work corresponding to a described microphone.
10. automobile ultrasonic sensor as claimed in claim 3, it is characterised in that integrally disposed in described electronic circuit cell have single-chip microcomputer.
11. automobile ultrasonic sensor as claimed in claim 3, it is characterised in that integrally disposed in described electronic circuit cell have power module and communication module, and described sensor externally carries out signal transmission by described communication module.
12. automobile ultrasonic sensor as claimed in claim 11, it is characterized in that, described covers disposed on sensor is equipped with 3 pins for external connection: pin PIN1, pin PIN2 and pin PIN4, or is provided with 4 pins: pin PIN1, pin PIN2, pin PIN3 and pin PIN4；Wherein, at described sensor internal, pin PIN1 is connected with described power module, and pin PIN4 is earth terminal, and pin PIN2 is connected with described communication module, or pin PIN2, pin PIN3 are connected with described communication module respectively.
13. automobile ultrasonic sensor as claimed in claim 3, it is characterised in that when described sensor monitors the utilization of system blind spot detection sensor as automobile blind spot, described sensor and automobile reflector are set to one.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106314327A (en) * | 2016-08-30 | 2017-01-11 | 陈武强 | Detection device and detection method of car ultrasonic blind area for preventing ground measuring error and misinformation |
| CN106405560A (en) * | 2016-08-30 | 2017-02-15 | 陈武强 | Ground error detection and report prevention long distance automobile ultrasonic wave detection method and detection device |
| CN110749888A (en) * | 2019-12-20 | 2020-02-04 | 广州赛特智能科技有限公司 | Distance measurement method based on ultrasonic distance measurement system |
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