CN107179539A - A kind of automobile ultrasonic sensor - Google Patents
A kind of automobile ultrasonic sensor Download PDFInfo
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- CN107179539A CN107179539A CN201710543471.0A CN201710543471A CN107179539A CN 107179539 A CN107179539 A CN 107179539A CN 201710543471 A CN201710543471 A CN 201710543471A CN 107179539 A CN107179539 A CN 107179539A
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- ultrasonic sensor
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- sensor
- microphone
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- 238000003199 nucleic acid amplification method Methods 0.000 claims description 6
- 238000001514 detection method Methods 0.000 claims description 5
- 238000004891 communication Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- 230000008569 process Effects 0.000 claims description 3
- 238000013519 translation Methods 0.000 claims description 2
- 230000000087 stabilizing effect Effects 0.000 claims 1
- 238000013461 design Methods 0.000 description 6
- 239000003990 capacitor Substances 0.000 description 5
- 230000005669 field effect Effects 0.000 description 5
- 239000000523 sample Substances 0.000 description 5
- 238000012545 processing Methods 0.000 description 4
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- 238000012544 monitoring process Methods 0.000 description 2
- 239000000565 sealant Substances 0.000 description 2
- 238000002604 ultrasonography Methods 0.000 description 2
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- 230000005540 biological transmission Effects 0.000 description 1
- 210000005069 ears Anatomy 0.000 description 1
- 230000007340 echolocation Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
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Classifications
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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
-
- 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
- G01S15/02—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems using reflection of acoustic waves
- G01S15/06—Systems determining the position data of a target
- G01S15/08—Systems for measuring distance only
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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 a kind of automobile ultrasonic sensor, including shell, and microphone, built-in circuit in it, wherein, the circuit unit for converting analog signals into digital pulse signal is provided with built-in circuit, ultrasonic wave is outwards launched in microphone work, and the ultrasonic wave reflected by barrier is received and converted to small analog signal through microphone, and the analog signal is converted directly into digital pulse signal through circuit unit and exported.Ultrasonic sensor of the present invention, profile, simple and compact for structure, easy for installation, outward appearance is beautiful, and reliability is high；And its good in anti-interference performance, cost is low, and combination property is splendid.
Description
Technical field
The present invention relates to a kind of automobile ultrasonic sensor.More particularly, to it is a kind of coordinate radar for backing car in the car, it is preceding
Enter radar, automatic parking, the ultrasonic sensor of blind area monitoring system effect.
Background technology
At this stage, most reversing radar of vehicle or advance radar, automated parking system, partial automobile blind area monitoring system
System, is all operated using ultrasonic wave, and the echolocation function of the animal such as bat, dolphin in its general principle and nature is former
Reason is the same.Sound is a kind of ripple, and our human ears can hear that the frequency range of sound is general in 20Hz-20KHz, more than 20KHz
, people is unheard, referred to as ultrasonic wave.The aerial spread speed of ultrasonic wave is also equal to velocity of sound（340 meter per seconds）；It is super
Sound wave is run into after barrier, can echogenicity, then by calculating the time difference between launching and receiving, with regard to can calculate county of emission with
The distance of barrier.So that radar for backing car works as an example, reverse radar system passes through main frame（Controller）It is multiple super according to SECO
Sonic sensor is worked, and the signal that ultrasound microphones detection is returned is transmitted further to after being handled through ultrasonic sensor built-in circuit
Main frame, main frame finds out the distance of sensor and barrier by high-speed computation, then main frame by internal or external sound or
Display alarm, so that effectively auxiliary driver is moved backward.
At present, the ultrasonic sensor of in the market substantially has two classes.The first kind is internal without electricity such as signal enhanced processings
The faint analog signal detected is transferred directly to main frame by the ultrasonic sensor on road, sensor by shielding line.It is this, pass
Sensor size is smaller, poor anti jamming capability, therefore mainly applies to install market additional after sale.
Equations of The Second Kind is the internal ultrasonic sensor provided with circuits such as signal enhanced processings, that is, has the ultrasonic wave of built-in circuit
Sensor, sensors with auxiliary electrode is divided into two kinds again according to signal transacting and transmission means, and the first is the active of output analog signal
Sensor, also referred to as active probe；Second is output digit signals（Digital pulse signal）It is digital（Digitlization）Sensor,
Also referred to as digital probe；This two kinds of sensors（Probe）Mainly apply to automobile main frame maker.Digital transducer confronting active is passed
Sensor, anti-interference energy is strong, and versatility preferably, but carries CPU because of the usual indoor design of digital transducer（Microprocessor）,
Therefore cost is of a relatively high.Meanwhile, more active and digital transducer complex structural designs, poor reliability installs inconvenient,
Outward appearance is not beautiful enough after installation.
The content of the invention
The problem of existing for prior art, it is outer after assembling it is an object of the invention to provide one kind is simple and reliable for structure
See beautiful, circuit versatility, strong antijamming capability, and the advantageous digital type ultrasound wave sensor of cost.
To achieve the above object, a kind of automobile ultrasonic sensor of the invention, including shell, and it is transaudient in it
Device, built-in circuit, wherein, the circuit unit for converting analog signals into digital pulse signal is provided with built-in circuit,
Ultrasonic wave is outwards launched in microphone work, and the ultrasonic wave reflected by barrier is received and converted to small mould through microphone
Intend signal, the analog signal is converted directly into digital pulse signal through circuit unit and exported.
Further, the built-in circuit includes power supply filter circuit of pressure-stabilizing unit, launch driving circuit unit, echo amplification
Circuit unit, echo frequency selection circuit unit, echo threshold circuit unit, echo shaping integrating circuit unit；Wherein, transmitting driving
Circuit unit connects power supply filter circuit of pressure-stabilizing unit, echo amplifier circuit unit connection echo frequency selection circuit unit, echo choosing
Frequency circuit unit connects echo threshold circuit unit, echo threshold circuit unit connection echo shaping integrating circuit unit, echo
Shaping integrating circuit unit connects launch driving circuit unit.
Further, system host or other sensors input digital pulse signal to the ultrasonic sensor, drive institute
The launch driving circuit cell operation of ultrasonic sensor is stated, the launch driving circuit unit produces high-voltage pulse signal
Drive the microphone work outwards transmitting ultrasonic wave.
Further, the analog signal is carried out via the echo amplifier circuit unit and the echo frequency selection circuit unit
Amplification and filtering process, the analog signal after amplification is via the echo threshold circuit unit and the echo shaping integrating circuit
Cell translation is digital pulse signal.
Further, the ultrasonic sensor also includes being provided with connector sheath on connector terminals, the shell, connects
Connector terminals are connected with built-in circuit, and are fixedly connected on connector sheath, and connector terminals constitute the ultrasonic wave with sheath
The connector of sensor, the connector connects system host or other sensors by wire harness, realize system object detection and
Data communication facility.
Further, the head of the shell is provided with the installation cavity of the microphone, the microphone partly by interior
Rubber sleeve is installed in installation cavity, and the top of the microphone is by setting disc lid to be fixed in installation cavity.
Further, it is provided with the outer circumference surface of the case head in annular slot, the disc lid and is provided with annular
Card column, annular card column is connected and fixed with annular slot, and the microphone is fixed in installation cavity.
Further, part is covered and the perforate cooperation installation on bumper by outer rubber on the microphone.
Further, the sponge for absorbing unnecessary ultrasonic wave is provided between the microphone bottom and the built-in circuit
Block.
Further, the ultrasonic sensor is provided with card column equipped with mounting frame for sensor on the shell, sensing
Neck is provided with device mounting bracket, is connected and fixed by card column with neck, makes the ultrasonic sensor that fixation to be firmly installed
In mounting frame for sensor, mounting frame for sensor is fixed on bumper, so that the ultrasonic sensor is pacified
Dress is fixed on bumper.
Further, the connector is provided with ground wire, power line and connection.
Further, the power supply filter circuit of pressure-stabilizing unit includes diode D1, electrochemical capacitor E1 and electric capacity C1；System
Main frame or other sensors are powered to the ultrasonic sensor, and power supply is filtered out low by diode D1 rectifications, electrochemical capacitor E1
Frequency power noise, electric capacity C1 filters out high frequency electric source noise, for the power supply of other circuit with stable.
Further, the launch driving circuit unit includes resistance R18, resistance R19, resistance R20, resistance R01, resistance
R02, comparator U2B, P-channel field-effect transistor (PEFT) pipe Q1, N-channel FET Q2, electric capacity C2 and middle all transformer T；The transmitting
Drive circuit unit 72 presses and discharged repeatedly to the microphone 60, outside to make it produce the ultrasonic wave of corresponding pulses frequency
Transmitting.
Further, the echo amplifier circuit unit includes resistance R03, resistance R04, resistance R05A, resistance R05, resistance
R06, resistance R07, resistance R08, electric capacity C2A, electric capacity C3, electric capacity C4, electric capacity C5, electric capacity C7, diode D2B, diode D2A,
Triode Q3, operational amplifier U1A and adjustable resistance VR.
Further, the echo frequency selection circuit unit includes resistance R09, resistance R10, resistance R11, resistance R12, resistance
R13, electric capacity C8, electric capacity C9, electric capacity C10, electric capacity C11, electric capacity C12, operational amplifier U1B.
Further, the echo threshold circuit unit includes resistance R14, resistance R15, electric capacity C13, comparator U2A.
Further, the echo shaping integrating circuit unit includes resistance R16, resistance R17, electric capacity C14, electric capacity C15, three
Pole pipe Q4.
Ultrasonic sensor of the present invention, profile, simple and compact for structure, easy for installation, outward appearance is beautiful, and reliability is high；And
Its good in anti-interference performance, cost is low, and combination property is splendid.
Brief description of the drawings
Fig. 1 is ultrasonic sensor perspective exploded view of the present invention；
Fig. 2 is ultrasonic sensor schematic perspective view of the present invention；
Fig. 3 is ultrasonic sensor head portion section decomposing schematic representation of the present invention；
Fig. 4 is ultrasonic sensor head portion diagrammatic cross-section of the present invention；
Fig. 5 is ultrasonic sensor mounting bracket schematic perspective view of the present invention；
Fig. 6 is ultrasonic sensor of the present invention and mounting bracket assembling schematic diagram；
Fig. 7 is ultrasonic sensor internal electric schematic diagram of the present invention.
Embodiment
Below, refer to the attached drawing, is more fully illustrated to the present invention, shown in the drawings of the exemplary implementation of the present invention
Example.However, the present invention can be presented as a variety of multi-forms, the exemplary implementation for being confined to describe here is not construed as
Example.And these embodiments are to provide, so that the present invention is fully and completely, and it will fully convey the scope of the invention to this
The those of ordinary skill in field.
For ease of explanation, space relative terms such as " on ", " under " " left side " " right sides " can be used herein, for saying
The element or feature shown in bright figure is relative to another element or the relation of feature.It should be understood that except in figure
Outside the orientation shown, spatial terminology is intended to include the different azimuth of device in use or operation.If for example, in figure
Device is squeezed, be stated as being located at other elements or feature " under " element will be located into other elements or feature " on ".Cause
This, exemplary term " under " both upper and lower orientation can be included.Device can be positioned otherwise（It is rotated by 90 ° or is located at
Other orientation）, can correspondingly be explained used herein of the relative explanation in space.
As shown in Figures 1 to 6, a kind of automobile ultrasonic sensor of the invention, including shell 10, disc lid 20, interior rubber
Set 30, outer rubber set 40, sponge block 50, microphone 60, built-in circuit 70, connector terminals 80, fluid sealant 90.
Signal is connected and is mounted in shell 10 between microphone 60 and built-in circuit 70, and the signal of connector terminals 80 connects
Connect built-in circuit 70, connector terminals 80 are fixedly connected on the connector sheath 10H1 parts of shell 10, connector terminals 80 with
The sheath 10H1 of shell 10 constitutes the connector H1 of ultrasonic sensor, and connector H1 connects system host or other by wire harness
Ultrasonic sensor, realizes the object detection and data communication facility of system.
As shown in Figure 3, Figure 4, the head of shell 10 is provided with the installation cavity 11 of microphone 60, the excircle on the head of shell 10
Annular slot 10K2 is provided with face.60 times parts of microphone are installed in installation cavity 11 by interior rubber sleeve 30, pass through disc
Lid 20 and the interior close-fitting of rubber sleeve 30, and pass through the annular card column 20K1 and the annular slot 10K2 cards of case head in disc lid 20
Fixation is connect, microphone 60 is fixed in installation cavity 11.Part passes through outer rubber set 40 and bumper on microphone 60
Perforate 300Q1 set by 300, which coordinates, to be installed.Disc lid 20, shell 10 are exerted oneself by the annular fastening of internal rubber sleeve 30, interior rubber
Active force puts on microphone 60 to set 30 again, so that the fixation of microphone 60.
The pad of sponge block 50 is located between the bottom of microphone 60 and built-in circuit 70, and it absorbs microphone 60 from rear end（Bottom）
Unnecessary ultrasonic wave is sent, to prevent it from disturbing the normal object detection signal of sensor, Fig. 4 is seen.
Ultrasonic sensor of the present invention, the lower part of microphone 60, interior rubber sleeve 30, sponge block 50, built-in circuit 70 are put
In behind the inside of shell 10, in enclosure cavity redundant space part filled using fluid sealant 90, embedding.
Above structure design, it is ensured that the reliability of sensor mechanism, cause that sensor global design is compact again, volume compared with
Small, convenient install is used.
As shown in Fig. 2, Fig. 5, Fig. 6, ultrasonic sensor 100 is equipped with mounting frame for sensor 200, by shell 10
The mounting surface 10P1 of the microphone side and mounting surface 200P2 of mounting frame for sensor 200 supports cooperation, by symmetrical on shell 10
The two card column 10K1 and neck 200K2 on mounting frame for sensor 200 connect and fix, make ultrasonic sensor 100 firm
It is mounted on mounting frame for sensor 200.Mounting frame for sensor 200 is one of mounting bracket conventional at present, this installation
Support is fixed on bumper by thermal welding, so that ultrasonic sensor 100 is mounted on bumper
On, after installation, from the point of view of car outward appearance, it can only see the circular surfaces of the upper part of microphone 60 of sensor, Yi Jiyi
The outer rubber set 40 of small ring-shaped, therefore, after assembling, sensor outward appearance is beautiful.It is of course also possible to design different sensor peaces
Fill support so that sensor is fixed on bumper, and meets its function and appearance requirement.
Fig. 7 is ultrasonic sensor internal electric schematic diagram of the present invention, specifically introduces the in-built electrical of ultrasonic sensor 100
The design on road 70.Ultrasonic sensor 100 is three by the connector H1 wires being connected with the external world：One ground wire, for end
Mouth 2；One is that integrated system is the power line of the offer power supply of ultrasonic sensor 100, is port 1；One be system main frame
Or other sensor drivings or control inventive sensor work and inventive sensor is believed to main frame or the passback of other sensors
Number connection, be port 3.
Built-in circuit 70 includes power supply filter circuit of pressure-stabilizing unit 71, launch driving circuit unit 72, echo amplifying circuit
Unit 73, echo frequency selection circuit unit 74, echo threshold circuit unit 75, echo shaping integrating circuit unit 76.Transmitting driving
The connection power supply filter circuit of pressure-stabilizing of circuit unit 72 unit 71, the connection echo frequency selection circuit unit of echo amplifier circuit unit 73
74, the connection echo threshold circuit of echo frequency selection circuit unit 74 unit 75, the connection echo shaping product of echo threshold circuit unit 75
Parallel circuit unit 76, the connection launch driving circuit of echo shaping integrating circuit unit 76 unit 72.
Wherein, power supply filter circuit of pressure-stabilizing unit 71 is provided with diode D1, electrochemical capacitor E1 and electric capacity C1.System host
Or other sensors are powered to ultrasonic sensor of the present invention, power supply filters out low frequency by diode D1 rectifications, electrochemical capacitor E1
Power supply noise, electric capacity C1 filters out high frequency electric source noise, for the power supply of other circuit with stable.
Wherein, launch driving circuit unit 72 is provided with resistance R18, resistance R19, resistance R20, resistance R01, resistance R02, ratio
Compared with device U2B, P-channel field-effect transistor (PEFT) pipe Q1, N-channel FET Q2, electric capacity C2 and middle all transformer T.System host is other
Sensor inputs digital pulse signal by connector H1 port 3 to ultrasonic sensor 100, drives ultrasonic sensor
100 launch driving circuit unit 72 works, and there is provided comparator U2B reference by VCC power supplys partial pressure by resistance R19 and resistance R20
Voltage, when the level of port 3 is high, comparator U2B is output as low, N-channel FET Q2 conductings, P-channel field-effect transistor (PEFT) pipe Q1
Cut-off, VCC power supplys are supplied to electric capacity C2 by resistance R02 current limlitings;When the level of port 3 is low, comparator U2B is output as height,
N-channel FET Q2 ends, P-channel field-effect transistor (PEFT) pipe Q1 conductings, and P-channel field-effect transistor (PEFT) pipe Q1 is the voltage pull-down on electric capacity C2；
The high-frequency impulse of low and high level all transformer T, middle all transformer T in being driven by electric capacity C2 secondary generation high voltage pulse letter
Number driving microphone 60（SEN1）.Microphone 60 is pressed and discharged repeatedly, outside come the ultrasonic wave that produces corresponding pulses frequency
Transmitting.
Wherein, echo amplifier circuit unit 73 provided with resistance R03, resistance R04, resistance R05A, resistance R05, resistance R06,
Resistance R07, resistance R08, electric capacity C2A, electric capacity C3, electric capacity C4, electric capacity C5, electric capacity C7, diode D2B, diode D2A, three poles
Pipe Q3, operational amplifier U1A and adjustable resistance VR.Resistance R03 and electric capacity C2A are the build-out resistor and resonance of ultrasonic sensor
Electric capacity, resistance R04, electric capacity C3, resistance R05A, resistance R05, triode Q3 constitute first order amplifying circuit, and resistance R05A is the
The negative feedback resistor of one-level amplifying circuit, electric capacity C3 signal input filters；Diode D2B, diode D2A input for clamper
Signal, protects amplifying circuit.Electric capacity C4, adjustable resistance VR, resistance R06, electric capacity C5, operational amplifier U1A, resistance R07, resistance
R08, electric capacity C7 constitute second level amplifying circuit, and resistance R07, resistance R08, electric capacity C7 provide the base of stable operational amplification circuit
Quasi- voltage.Resistance R06 is feedback resistance, and electric capacity C4 is signal input filter, and electric capacity C5 is signal feedback filtering electric capacity, adjustable electric
Resistance VR is used for adjusting the gain of amplifying circuit.
Wherein, echo frequency selection circuit unit 74 is provided with resistance R09, resistance R10, resistance R11, resistance R12, resistance R13, electricity
Hold C8, electric capacity C9, electric capacity C10, electric capacity C11, electric capacity C12, operational amplifier U1B.Electric capacity C8, electric capacity C9 are that signal inputs filter
Ripple, resistance R09 is signal input resistance, and resistance R10, resistance R11 is feedback resistance, and electric capacity C10 is feedback filtering electric capacity, electric capacity
C11 is power filtering capacitor, and resistance R12 and resistance R13 are by VCC partial pressures, and electric capacity C12 is divider filter electric capacity, is operation amplifier
Device U1B provides stable reference voltage, and resistance R12A is bias resistance.
Wherein, echo threshold circuit unit 75 is made up of resistance R14, resistance R15, electric capacity C13, comparator U2A, resistance
Voltage signal after partial pressure is filtered signal partial pressure, electric capacity C13 and gives comparator U2A there is provided reference voltage by R14 and resistance R15
The 3rd pin, when comparator U2A the 2nd pin voltage be less than the 3rd pin voltage when, the pin of comparator the 1st is output as high level, when than
When voltage compared with the 2nd pin of device is more than the 3rd pin voltage, the pin of comparator the 1st is output as low level.
Wherein, echo shaping integrating circuit unit 76 is by resistance R16, resistance R17, electric capacity C14, electric capacity C15, triode Q4
Composition, when the pin of comparator U2A the 1st are output as high level, triode Q4 conductings, when the pin of comparator U2A the 1st are output as low level
When, triode Q4 cut-offs, resistance R16 is pull-up resistor, and electric capacity C14, electric capacity C15 are integral filtering electric capacity, and resistance R17 is output
Resistance.
To sum up, system host or other sensors input digital pulse signal, driving to ultrasonic sensor 100 of the present invention
The launch driving circuit unit 72 of ultrasonic sensor 100 works, and launch driving circuit unit 72 produces high-voltage pulse signal and driven
Dynamic microphone 60（SEN1）Ultrasonic wave is outwards launched in work, and the ultrasonic wave reflected by barrier is received and turned through microphone 60
Small analog signal is changed to, this small analog signal is via echo amplifier circuit unit 73 and echo frequency selection circuit unit 74
It is amplified and filtering process, the analog signal after amplification is via echo threshold circuit unit 75 and echo shaping integrating circuit list
Member 76 is converted to digital pulse signal, and the CPU module that this digital pulse signal can directly input system host carries out data processing,
It is not required to carry out it again other any digitized processings, you can draw range measurement knot of the sensor to obstructing objects by CPU
Really.
It can thus be appreciated that, although inventive sensor does not use CPU（Microprocessor）, but built-in circuit of the present invention 70 has
There are digital capabilities, ultrasonic sensor of the present invention is digital（Digitlization）Probe, it has good antijamming capability, together
When, opposite band CPU digital probe has splendid cost advantage again.
It is described above, only present pre-ferred embodiments, therefore the scope that the present invention is implemented can not be limited according to this, i.e., according to
The equivalent changes and modifications that the scope of the claims of the present invention and description are made, all should still belong in the range of the present invention covers.
Claims (10)
1. a kind of automobile ultrasonic sensor, it is characterised in that the ultrasonic sensor includes shell, and the biography in it
Sound device, built-in circuit, wherein, the circuit list for converting analog signals into digital pulse signal is provided with built-in circuit
Ultrasonic wave is outwards launched in member, microphone work, and the ultrasonic wave reflected by barrier is received and converted to small through microphone
Analog signal, the analog signal through circuit unit be converted directly into digital pulse signal export.
2. automobile ultrasonic sensor as claimed in claim 1, it is characterised in that the built-in circuit is filtered including power supply voltage stabilizing
Wave circuit unit, launch driving circuit unit, echo amplifier circuit unit, echo frequency selection circuit unit, echo threshold circuit list
Member, echo shaping integrating circuit unit；Wherein, launch driving circuit unit connection power supply filter circuit of pressure-stabilizing unit, echo is put
Big circuit unit connection echo frequency selection circuit unit, echo frequency selection circuit unit connection echo threshold circuit unit, echo threshold
Circuit unit connects echo shaping integrating circuit unit, echo shaping integrating circuit unit connection launch driving circuit unit.
3. automobile ultrasonic sensor as claimed in claim 2, it is characterised in that system host or other sensors are to described
Ultrasonic sensor inputs digital pulse signal, drives the launch driving circuit cell operation of the ultrasonic sensor,
The launch driving circuit unit produces high-voltage pulse signal and drives the microphone work outwards transmitting ultrasonic wave.
4. automobile ultrasonic sensor as claimed in claim 2, it is characterised in that the analog signal is put via the echo
Big circuit unit and the echo frequency selection circuit unit are amplified and filtering process, and the analog signal after amplification is via described time
Ripple threshold circuit unit and the echo shaping integrating circuit cell translation are digital pulse signal.
5. automobile ultrasonic sensor as claimed in claim 1, it is characterised in that the ultrasonic sensor also includes patching
Connector sheath is provided with part terminal, the shell, connector terminals are connected with built-in circuit, and are fixedly connected on connector
Sheath, connector terminals constitute the connector of the ultrasonic sensor with sheath, and the connector connects system master by wire harness
Machine or other sensors, realize the object detection and data communication facility of system.
6. automobile ultrasonic sensor as claimed in claim 1, it is characterised in that the head of the shell is provided with the biography
Part is installed in installation cavity by interior rubber sleeve under the installation cavity of sound device, the microphone, and the top of the microphone passes through
Disc lid is set to be fixed in installation cavity.
7. automobile ultrasonic sensor as claimed in claim 6, it is characterised in that set on the outer circumference surface of the case head
It is equipped with annular slot, the disc lid and is provided with annular card column, annular card column is connected and fixed with annular slot, is passed described
Sound device is fixed in the installation cavity.
8. automobile ultrasonic sensor as claimed in claim 1, it is characterised in that part passes through outer rubber on the microphone
Set coordinates with the perforate on bumper to be installed.
9. automobile ultrasonic sensor as claimed in claim 1, it is characterised in that the microphone bottom and the in-built electrical
The sponge block for absorbing unnecessary ultrasonic wave is provided between road.
10. automobile ultrasonic sensor as claimed in claim 1, it is characterised in that the ultrasonic sensor is equipped with biography
It is provided with sensor mounting bracket, the shell on card column, mounting frame for sensor and is provided with neck, passes through card column and neck card
Fixation is connect, the ultrasonic sensor is firmly mounted on mounting frame for sensor, mounting frame for sensor is fixed on vapour
On car bumper, so that the ultrasonic sensor is mounted on bumper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710543471.0A CN107179539A (en) | 2017-07-05 | 2017-07-05 | A kind of automobile ultrasonic sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710543471.0A CN107179539A (en) | 2017-07-05 | 2017-07-05 | A kind of automobile ultrasonic sensor |
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| Publication Number | Publication Date |
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| CN107179539A true CN107179539A (en) | 2017-09-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710543471.0A Pending CN107179539A (en) | 2017-07-05 | 2017-07-05 | A kind of automobile ultrasonic sensor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109814114A (en) * | 2019-01-15 | 2019-05-28 | 北京百度网讯科技有限公司 | A kind of ultrasonic radar array, obstacle detection method and system |
| CN112556613A (en) * | 2020-11-30 | 2021-03-26 | 中国科学院武汉岩土力学研究所 | Tunnel structure convergence deformation monitoring system and method based on ultrasonic radar |
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| JP2004253912A (en) * | 2003-02-18 | 2004-09-09 | Matsushita Electric Works Ltd | Ultrasonic sensor |
| CN101034159A (en) * | 2007-02-13 | 2007-09-12 | 余晓鹏 | Automobile ultrasonic sensor |
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| CN112556613A (en) * | 2020-11-30 | 2021-03-26 | 中国科学院武汉岩土力学研究所 | Tunnel structure convergence deformation monitoring system and method based on ultrasonic radar |
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