CN208969046U - A kind of windshield water mist detection device based on ultrasound - Google Patents
A kind of windshield water mist detection device based on ultrasound Download PDFInfo
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- CN208969046U CN208969046U CN201821238621.3U CN201821238621U CN208969046U CN 208969046 U CN208969046 U CN 208969046U CN 201821238621 U CN201821238621 U CN 201821238621U CN 208969046 U CN208969046 U CN 208969046U
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- water mist
- transmitting transducer
- energy converter
- windshield
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Abstract
The utility model discloses a kind of windshield water mist detection devices based on ultrasound, including glass body, transmitting transducer and receive energy converter, the transmitting transducer be arranged in any a line of glass body inner surface or two sides of arbitrary neighborhood on for emitting surface ultrasonic wave, the receptions energy converter, which is correspondingly arranged on the side parallel with transmitting transducer, is used for receiving surface ultrasonic wave；The transmitting transducer and reception transducer-engagement are in interior surfaces of glass formation ultrasonic surface detection zone.The utility model can not only accurately detect the water mist on windshield inner surface, additionally it is possible to specific location of the water mist region on windshield inner surface be identified, in order to achieve the purpose that accurate demisting.
Description
Technical field
The utility model relates to Automobile Products technical fields, relate in particular to a kind of windshield water based on ultrasound
Mist detection device, the detection device are specifically used for the water mist of detection windshield inner surface.
Background technique
Condensation water mist, or humidity, temperature when car inside are tended under arctic weather, on windshield
When degree and larger external environment difference, condensation water mist is also easy on windshield.When condensation has water mist on windshield,
It will seriously affect the sight of driver, easily lead to that safety accident occurs, it is therefore desirable at the water mist on windshield
Reason.
Currently, and removal determining to the observation of water mist on windshield is usually all rule of thumb controlled by driver, that is, work as
When water mist regional diffusion on windshield is to certain procedures, driver removes water mist by wiping or opening air-conditioning manually.But
This mode needs to be manually operated, and has dispersed the attention of driver and the control force to steering wheel, has been easy to cause safety accident.
Also, in the actual operation process there is also manual operation cannot timely demisting the problem of.
In order to solve the above-mentioned technical problem, following technology is proposed in the prior art:
Chinese patent notification number disclosed for the prior art of " CN106427901A " on 2 22nd, 2017 a kind of vehicle-mounted
Formula ultrasonic wave demisting defroster, including the ultrasound transducer array being installed on console face, the ultrasonic transducer
Array includes at least one set of transversely arranged controller mould group, and the controller mould group passes through harness and multimedia display screen mould
Block, automatic monitoring sensor connection.Mist, the white automatic monitoring method being related on a kind of glass simultaneously.The patent is passed by light
Water mist on sensor and range sensor cooperation detection windshield, and ultrasonic wave demisting is automatically turned on when reaching setting state
Defroster carries out demisting defrosting.Since the patent realizes automatic detection and the automatic defrosting of water mist, it not will disperse and drive
The attention for the person of sailing is conducive to improve safety.But in actual use, since range sensor is mounted in the glass that keeps out the wind
One separate modular at glass rear, the disadvantage is that separate modular installation influences sight and safety, and dead angle easy to form, it can not
Windshield fogging position is positioned.And light sensor uses visible light or non-visible light, under solar radiation, simultaneously
There are the electromagnetic wave of various frequency spectrums, more than visible light, thus it is equally possible interfered strongly, so as to cause detection failure.
And since most of windshield are all curve forms, different location curvature is different, dead angle easy to form.Light sensor is also deposited
It is big and the disadvantages of installation and debugging are inconvenient in volume.
In addition, there are also the technical solutions of other automatic detection demistings in the prior art, mainly include the following two kinds:
The first is Temperature and Humidity method, belongs to indirect detection method.Its testing principle is to detect vapour simultaneously by sensor
The temperature and humidity in interior portion judges whether to reach fogging point, when being close to or up to fogging point, starts demister, continues
Temperature and humidity is detected, when the conditions are not met, stops demister.Or constant time lag stops for a period of time after starting.It should
Method realizes automatic detection and defrosting function to a certain extent, but there is also following disadvantages: temperature and humidity detector can only
The fogging condition of installation site subrange is represented, whether fogging is unable to judge accurately for normal driver observation area；It is interior empty
Gas difference air mobility status (switch of such as vehicle window and openings of sizes difference), temperature and humidity detection can bring deviation；Temperature
Be delayed there are longer response etc. with moisture detection sensor, these disadvantages eventually lead to demister generate it is following abnormal
Reaction: akinesia when such as needing to act, or movement cause driving dangerousness not in time, do not need generation when movement and act, interference
It drives, and waste of energy etc..On the whole, which can not accurately detect the degree of fogging and the position of fogging
It sets, can not directly know the true fogging situation of windshield.
Second is capacitance detection method, belongs to direct Detection Method, testing principle be by glass surface installation or
It arranges conducting wire, forms capacitor, when glass surface fogging, the dielectric properties between conducting wire change, so as to cause electricity
Appearance changes, then is identified by connected detection circuit to capacitance variation, to judge whether fogging.Condenser type
Detection method is to have directly detected fogging than the advantages of Temperature and Humidity scheme, just carries out demisting movement.But it is remained
Following defect: 1, it is not easy to the fogging situation of detection key area, even if using transparent conductive material (similar capacitance touch screen),
The transparency that equally will cause key area is obvious；And it is further desired that glass cover-plate protects conducting wire, technique is difficult to implement.
2, if only arranging conducting wire to part, it can not accurately determine the fogging situation of overall wind shielding glass；Conducting wire material
Heat transfer situation may be will affect, the unsafe conditions of windshield fogging and the non-fogging in capacitive sensing region occur, on the contrary
The case where capacitive sensing region fogging may also occur and windshield non-fogging, the energy at this moment can be consumed in vain.
Utility model content
Utility model aims to solve the above-mentioned problems in the prior art, provide a kind of based on ultrasound
Windshield water mist detection device, the utility model can not only accurately detect the water mist on windshield inner surface, moreover it is possible to
Identify specific location of the water mist region on windshield inner surface, enough in order to achieve the purpose that accurate demisting.
To achieve the above object, the technical solution adopted in the utility model is as follows:
A kind of windshield water mist detection device based on ultrasound, it is characterised in that: including glass body, transmitting transducing
Device and energy converter is received, the transmitting transducer is arranged in any a line of glass body inner surface or arbitrary neighborhood two
Emitting surface ultrasonic wave is used on side, the reception energy converter to be correspondingly arranged on the side parallel with transmitting transducer for connecing
Receive ultrasonic surface；The transmitting transducer and reception transducer-engagement are in interior surfaces of glass formation ultrasonic surface detection zone
Domain.
On two parallel sides of the glass body inner surface, the quantity of transmitting transducer is more than, less equal than connecing
Receive the quantity of energy converter.
The energy converter is wedge type transducer or grating transducer.
The transmitting transducer and reception energy converter pass through connection sheet and are bonded on the edge of glass body inner surface.
Using utility model has the advantages that
1, using the water mist of ultrasonic surface detection windshield inner surface, ultrasonic surface generates decays the utility model
(acoustic attenuation) includes attenuation by absorption and scatter attenuation, wherein attenuation by absorption is the viscosity due to medium, heat transfer and various relaxations
Caused by the phenomenon of Henan；Scatter attenuation is generation when encountering the interface that other mediums are formed in communication process due to ultrasonic surface
The reflection to different directions, decay so as to cause energy dropoff.And water mist has very high viscosity, it will be to ultrasonic surface
Very strong attenuation by absorption is generated, even seldom water mist can also generate obvious effect.In addition, droplet edge in water mist
Acoustic impedance discontinuity, scatter attenuation is equally existed, so that weaken by the ultrasonic surface of water mist, eventually by receiving
Signal contrast, so that it may recognize such variation.Therefore, when by ultrasonic surface be applied to detection windshield inner surface
Water mist when, sensitive reaction (i.e. attenuation by absorption and scatter attenuation) can be made to water mist.Specifically, when water mist moisture condensation arrives
When glass surface, the surface acoustic waves signal of corresponding position can decline, and receiving end can detecte this decline variation, thus really
Determine touch position coordinates.Compared with existing detection technique, the utility model is using transmitting transducer and receives transducer-engagement
The water on windshield can not only be accurately detected in the detection mode that interior surfaces of glass forms ultrasonic surface detection zone
Mist, additionally it is possible to the specific location of water mist region on the windshield is identified, to achieve the purpose that accurate demisting.
2, in the utility model on two parallel sides of glass body inner surface, the quantity of transmitting transducer is more than, is few
In or equal to receive the quantity of energy converter, the advantages of structure is can to reduce striped technique or striped module, nonpassage of signal mistake
Intensity is some higher when streak reflex, too fast windshield of decaying applied to ultrasonic surface, or can reduce circuit amplification
Multiple requirement.
3, transmitting transducer and reception energy converter can both be directly anchored to the side of glass body inner surface in the utility model
On edge, it can also be bonded in by connection sheet on the edge of glass body inner surface.Wherein, directly fixed mode has installation side
The advantages that formula is more firm, appearance is more beautiful.And the advantages of in such a way that connection sheet is fixed, is not needing to the glass that keeps out the wind
Glass full wafer is processed, it is only necessary to is bonded module in the automobile stage, the module is equally applicable due to compact volume and convenience
Market is filled after automobile.
4, the utility model uses ultrasonic surface technology (will not pass through air borne), and energy converter is mounted on windshield
Edge on, in existing vehicle structure also be easy hide, do not influence appearance and safety；According to the different installation sides of energy converter
Formula, can easily realize the fogging position positioning of different accuracy, and not have dead angle；Ultrasonic surface belongs to mechanical oscillating wave,
The electromagnetic wave of various frequencies does not have interference effect；Ultrasonic surface not only can be along plane efficient propagation, can also be along song
Face efficient propagation, will not because of windshield shape it is different and change.
5, existing surface acoustic wave touch technology is applied to the water mist of windshield body internal surface by the utility model
In detection technique, it had not only been equivalent to the new application invention of known product, but also has overcome technology prejudice, simultaneously because it has accurately
Testing result, thus have novelty.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of embodiment 1；
Fig. 2 is the structural schematic diagram of embodiment 2；
Fig. 3 is the structural schematic diagram of embodiment 3；
Fig. 4 is the structural schematic diagram of embodiment 4；
Fig. 5 is the structural schematic diagram of embodiment 5；
Figure label are as follows: 1, glass body inner surface, 2, transmitting transducer, 3, reception energy converter, 4, connection sheet.
Specific embodiment
Embodiment 1
A kind of windshield water mist detection device based on ultrasound, including glass body, transmitting transducer 2 and reception are changed
Energy device 3, the transmitting transducer 2 are arranged in any a line of glass body inner surface 1 for emitting surface ultrasonic wave, institute
It states reception energy converter 3 to be correspondingly arranged on the side parallel with transmitting transducer 2 for receiving surface ultrasonic wave, and emits transducing
The quantity of device 2 is equal to the quantity for receiving energy converter 3；The transmitting transducer 2 cooperates with energy converter 3 is received in interior surfaces of glass shape
At ultrasonic surface detection zone.
In actual use, the detection device further includes controller to the present embodiment, and controller is preferably mounted at vapour
On the console of vehicle or in console, for controlling transmitting transducer 2 and receiving the transmitting of energy converter 3 and receiving surface ultrasonic wave.
The energy converter is wedge type transducer or grating transducer.
The implementation principle of the present embodiment are as follows:
First by controller control transmitting transducer 2 in 1 emitting surface ultrasonic wave of glass body inner surface, ultrasonic surface warp
Reception energy converter 3 on parallel edges feeds back to controller after receiving, to be formed in glass body inner surface 1 vertical or horizontal
Ultrasonic surface detection zone.When glass body inner surface 1 has water mist, it is absorbed decaying by the ultrasonic surface of water mist,
Controller determines specific location of the water mist on glass body inner surface 1 according to the deamplification received, and is believed according to decaying
Number degree of strength determine water mist amount whether reach influence sight standard, therefore, it is determined that whether need to open demister progress
Demisting.Further, controller can also determine whether water mist amount reaches the mark for influencing sight according to the degree of strength of deamplification
Standard does not need to open demister if not up to influencing the standard of sight.
Embodiment 2
The present embodiment is substantially the same manner as Example 1, and the main distinction is:
The transmitting transducer 2 is arranged on two sides of arbitrary neighborhood of glass body inner surface 1 super for emitting surface
Sound wave, the reception energy converter 3 are correspondingly arranged on the two other side parallel with transmitting transducer 2 super for receiving surface
Sound wave.So when detecting, the transmitting transducer 2 and reception energy converter by being arranged on 1 four edges of glass body inner surface
3, it will be able to form the staggered ultrasonic surface detection zone of vertical and horizontal in glass body inner surface 1.
Embodiment 3
A kind of windshield water mist detection device based on ultrasound, including glass body, transmitting transducer 2 and reception are changed
Energy device 3, the transmitting transducer 2 are arranged in any a line of glass body inner surface 1 for emitting surface ultrasonic wave, institute
Reception energy converter 3 is stated to be correspondingly arranged on the side parallel with transmitting transducer 2 for receiving surface ultrasonic wave；The transmitting is changed
Energy device 2 and the cooperation of reception energy converter 3 are in interior surfaces of glass formation ultrasonic surface detection zone.
In the present embodiment, on two parallel sides of the glass body inner surface 1, the quantity of transmitting transducer 2 is more than
Or less than receiving the quantity of energy converter 3, i.e., transmitting transducer 2 and reception energy converter 3 are a multiple receipts or the relationship of multicast.
Further, the quantity of the present embodiment preferred emission energy converter 2 is more than the quantity for receiving energy converter 3.
The implementation principle of the present embodiment are as follows:
First emit fan-shaped ultrasonic surface in glass body inner surface 1 by controller control transmitting transducer 2, surface is super
Sound wave feeds back to controller after reception energy converter 3 corresponding on parallel edges reception, and (multiple transmitting transducers 2 emit a reception
Energy converter 3 receives), to form vertical or horizontal ultrasonic surface detection zone in glass body inner surface 1.When glass sheet
When there is water mist on internal surface 1, it is absorbed decaying by the ultrasonic surface of water mist, controller is true according to the deamplification received
Determine specific location of the water mist on glass body inner surface 1, and determines whether water mist amount reaches according to the degree of strength of deamplification
To the standard of sight is influenced, therefore, it is determined that whether needing to open demister carries out demisting.Further, controller can also basis
The degree of strength of deamplification determines whether water mist amount reaches the standard for influencing sight, if not up to influencing the standard of sight,
It does not need to open demister.
Embodiment 4
The present embodiment is substantially the same manner as Example 3, and the main distinction is:
The transmitting transducer 2 is arranged on two sides of arbitrary neighborhood of glass body inner surface 1 super for emitting surface
Sound wave, the reception energy converter 3 are correspondingly arranged on the two other side parallel with transmitting transducer 2 super for receiving surface
Sound wave.So when detecting, the transmitting transducer 2 and reception energy converter by being arranged on 1 four edges of glass body inner surface
3, it will be able to form the staggered ultrasonic surface detection zone of vertical and horizontal in glass body inner surface 1.
Embodiment 5
The present embodiment is essentially identical with embodiment 1-4, and the main distinction is: the transmitting transducer 2 and reception energy converter
3 are bonded on the edge of glass body inner surface 1 by connection sheet 4, and 4 material of connection sheet can be metal, plastics, pottery
Porcelain, glass etc., optional with a thickness of 0.2-6MM, transmitting transducer 2 and reception energy converter 3 are each attached in connection sheet 4, then are passed through
Connection sheet 4 cements on glass body inner surface 1.Specifically, the quantity of connection sheet 4 is 4 by taking Fig. 2 in embodiment 2 as an example
In addition piece receives energy converter 3 for being arranged in two panels connection sheet 4 wherein for transmitting transducer 2 to be arranged in two panels connection sheet 4.
First transmitting transducer 2 and reception energy converter 3 are separately positioned in 4 connection sheets 4 when installation, then 4 connection sheets 4 are directly viscous
Gu facilitating the later period to install additional on the edge of 1 surrounding of glass body inner surface.It is related to different structure in the remaining embodiments
The structure that transmitting transducer 2 and reception energy converter 3 are installed using connection sheet 4 is identical as the embodiment, and this is no longer going to repeat them.
Claims (4)
1. a kind of windshield water mist detection device based on ultrasound, it is characterised in that: including glass body, transmitting transducer
(2) and energy converter (3) are received, the transmitting transducer (2) is arranged in any a line of glass body inner surface (1) or appoints
Emitting surface ultrasonic wave is used in adjacent two edges of anticipating, the reception energy converter (3) to be correspondingly arranged at and transmitting transducer (2) phase
Receiving surface ultrasonic wave is used on parallel side；The transmitting transducer (2) and reception energy converter (3) cooperation are in interior surfaces of glass
Form ultrasonic surface detection zone.
2. a kind of windshield water mist detection device based on ultrasound as described in claim 1, it is characterised in that: the glass
On two parallel sides of glass body internal surface (1), the quantity of transmitting transducer (2) is more than, less equal than reception energy converter
(3) quantity.
3. a kind of windshield water mist detection device based on ultrasound as described in claim 1, it is characterised in that: described to change
Energy device is wedge type transducer or grating transducer.
4. a kind of windshield water mist detection device based on ultrasound as described in any one of claim 1-3, feature
Be: the transmitting transducer (2) and reception energy converter (3) are bonded in glass body inner surface (1) by connection sheet (4)
On edge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821238621.3U CN208969046U (en) | 2018-08-02 | 2018-08-02 | A kind of windshield water mist detection device based on ultrasound |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821238621.3U CN208969046U (en) | 2018-08-02 | 2018-08-02 | A kind of windshield water mist detection device based on ultrasound |
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| Publication Number | Publication Date |
|---|---|
| CN208969046U true CN208969046U (en) | 2019-06-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201821238621.3U Active CN208969046U (en) | 2018-08-02 | 2018-08-02 | A kind of windshield water mist detection device based on ultrasound |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113770143A (en) * | 2021-08-30 | 2021-12-10 | 蚌埠高华电子股份有限公司 | Device and method for cleaning grinding residues of liquid crystal glass substrate |
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2018
- 2018-08-02 CN CN201821238621.3U patent/CN208969046U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113770143A (en) * | 2021-08-30 | 2021-12-10 | 蚌埠高华电子股份有限公司 | Device and method for cleaning grinding residues of liquid crystal glass substrate |
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