CN203178487U - Structure of ultrasonic wave detection device capable of eliminating blind area - Google Patents
Structure of ultrasonic wave detection device capable of eliminating blind area Download PDFInfo
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- CN203178487U CN203178487U CN 201320071137 CN201320071137U CN203178487U CN 203178487 U CN203178487 U CN 203178487U CN 201320071137 CN201320071137 CN 201320071137 CN 201320071137 U CN201320071137 U CN 201320071137U CN 203178487 U CN203178487 U CN 203178487U
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Abstract
The utility model discloses a structure of an ultrasonic wave detection device capable of eliminating a blind area. The ultrasonic wave detection device comprises a fixing base, wherein the fixing base is respectively provided with an ultrasonic wave transmitting end and an ultrasonic wave receiving end, the ultrasonic wave transmitting end and the ultrasonic wave receiving end are connected on the fixing base in the way of maintaining a predetermined spacing, a sound barrier separator plate is provided between the ultrasonic wave transmitting end and the ultrasonic wave receiving end, shock insulation rubber pads are respectively arranged between ultrasonic wave transmitting sensors arranged at the position of the ultrasonic wave transmitting end and the fixing base as well as between ultrasonic wave receiving sensors at the position of the ultrasonic wave receiving end and the fixing base, so as to block the shortest path of ultrasonic wave propagation, thereby realizing elimination of the blind area. The elimination of the blind area not only can realize continuous transmission and reception of wave beams, but also can avoid retreat of an installing position of the detection device caused by the blind area.
Description
Technical field
The utility model relates to the technical field of ultrasonic detection device, especially a kind of structure that needs to eliminate the ultrasonic detection device that detects the blind area
Background technology
We know that traditional ultrasonic detection device has the blind area of detection to exist, and detecting device can't detect the object in the blind area, as Fig. 1.The existence of detection blind area has bigger influence to the performance of ultrasonic detector.At first, be the omission of avoiding causing because of the blind area, detecting device must be greater than the blind area to the distance of testee, and this has strengthened the detection requisite space virtually, because of the limitation of conditions, can't increase this part space sometimes, will cause using this detection means.Secondly, existence because of the blind area, influenced the emission density of ultrasound examination pulse, after launching a detection pulse, must wait and be predetermined maximum detection apart from after the echo time, could launch the next pulse that detects, namely usual said receive previous echo after, send out the next ripple that detects again, otherwise echo just might be fallen the blind area and can't be detected, obviously, this performance to ultrasonic detector has very large influence, is difficult to the detection of the competent moving object far away of adjusting the distance especially.
Hyperacoustic velocity of propagation is 340 meter per seconds, suppose to detect apart from 12 meters of detecting device, be 4.5 meters minibus by the vehicle commander who detects section with the speed of 108 kilometers/hour (30 meter per seconds), the minibus that ultrasound wave arrives 12 meters is reflected again, need: 12 * 2/340=0.071 second, namely 71 milliseconds.Minibus takes by detecting section: 4.5/30=0.15 second, namely 150 milliseconds.As dead zone-eliminating not, detecting device can only be according to receiving that previous echo launches the next time interval emission that detects ripple again and detect pulse, and this minibus can only have 2 echoes at most like this.In actual applications, echo can not very correctly be detected, and the probability that car is lost 1～2 echo is very high, and because beam density is not enough, the omission situation can be very serious.Just strengthen emission density as dead zone-eliminating not, namely do not wait and be predetermined maximum and detect apart from after the echo time, just emission is next detects pulse, and effectively echo can drop in the scope of blind area and can't be correctly validated out with regard to very big probability is arranged.
The utility model content
The purpose of this utility model is to provide a kind of structure of ultrasonic detection device that can dead zone-eliminating.
So-called blind area is exactly the wave beam that emission sensor is sent, without tested reflected by objects, pass to receiving sensor with the shortest path, path as shown in Figure 2 2. with the path 3., during this period of time, the very strong wave beam of being come by " short circuit " that receiving sensor is received, and can't normally receive the echo of object, be referred to as the blind area during this period of time.
The utility model is eliminated the technical scheme that ultrasonic detector detects the blind area: a kind of structure of ultrasonic detection device that can dead zone-eliminating, ultrasonic detection device comprises holder, be respectively equipped with ultrasound wave transmitting terminal and ultrasound wave receiving end on the holder, ultrasound wave transmitting terminal and ultrasound wave receiving end maintain predetermined spacing and are connected on the described holder, between ultrasound wave transmitting terminal and ultrasound wave receiving end, be provided with the sound barrier dividing plate, the ultrasound wave receiving sensor that is arranged on the ultrasound wave emission sensor at ultrasound wave transmitting terminal place and ultrasound wave receiving end place respectively and the shock insulation rubber cushion is set between the holder, the short circuit paths that the blocking-up ultrasound wave is propagated realizes the elimination of blind area.
The principle schematic of dead zone-eliminating such as Fig. 3 " this device blocking-up wave beam short circuit paths synoptic diagram ", practical application structural drawing such as Fig. 4 " this device dead zone-eliminating structural drawing ".
Further, the ultrasound wave emission sensor is at least 2, and the ultrasound wave receiving sensor is at least 2.
Front end at each ultrasound wave emission sensor, ultrasound wave receiving sensor connects the loudspeaker with predetermined curved surface respectively.
The utility model compared with prior art has following advantage: dead zone-eliminating not only can be realized transmitting and receiving continuously of wave beam, and can avoid shrinking back of the pick-up unit installation site that causes because of the blind area.
Description of drawings
Fig. 1 is sound awl, blind area synoptic diagram;
Fig. 2 is conventional ultrasonic wave pipeline synoptic diagram;
Fig. 3 is the utility model device blocking-up wave beam short circuit paths synoptic diagram;
Fig. 4 is the utility model device dead zone-eliminating structural representation.
Embodiment
Below in conjunction with the drawings and specific embodiments content of the present utility model is described in further details.
Embodiment:
So-called blind area is exactly the wave beam that emission sensor is sent, without tested reflected by objects, be delivered to receiving sensor with the shortest path, path as shown in Figure 2 2. with the path 3., during this period of time, the very strong wave beam of being come by " short circuit " that receiving sensor is received, and can't normally receive the echo of object, be referred to as the blind area during this period of time.The blind area of ultrasonic detector is generally after emission finishes within several pulsewidths, and specifically " short circuit " path of the hangover characteristic of the pulse width of duration and emission, ballistic device, sound wave is relevant.
Dead zone-eliminating is topmost to be exactly " short circuit " path of blocking wave beam.Must block " short circuit " path of wave beams from three aspects: the propagation of air, carrying transmits and receives the direct propagation of the solid matter of sensor, and the induction between circuit is propagated.Present embodiment adopts following technological means to come dead zone-eliminating:
Please in conjunction with shown in Figure 3, a kind of structure of ultrasonic detection device that can dead zone-eliminating, ultrasonic detection device comprises holder 11, is respectively equipped with ultrasound wave transmitting terminal 12 and ultrasound wave receiving end 13 on the holder 11; At first see to cause when how to intercept the emission of ultrasound wave emission sensor that the air vibrations are directly delivered to the short circuit paths of ultrasound wave receiving sensor, present embodiment adopts and widens the distance that transmits and receives sensor, making ultrasound wave transmitting terminal 12 and ultrasound wave receiving end 13 maintain predetermined spacing is connected on the holder 11, simultaneously between ultrasound wave transmitting terminal 12 and ultrasound wave receiving end 13, be provided with sound barrier dividing plate 14, ultrasound wave emission sensor and the separated mode of ultrasound wave receiving sensor are intercepted short circuit paths between air, the air vibrations that cause when weakening the ultrasound wave emission effectively are directly delivered to receiving sensor, thereby blocking-up " short circuit " path 2.; Further, the short circuit paths that the ultrasound wave of obstruct ultrasound wave emission sensor emission is directly propagated in the support of bearing ultrasonic emission sensor and ultrasound wave receiving sensor, present embodiment specifically is by the ultrasound wave emission sensor 121 that is arranged on ultrasound wave transmitting terminal 12 places and the ultrasound wave receiving sensor 131 that is arranged on ultrasound wave receiving end 13 places respectively and shock insulation rubber cushion 15 is set between the holder 11, be directly delivered to the energy of receiving end from transmitting terminal by support thereby reduce ultrasound wave effectively, and then reach blocking-up wave beam " short circuit " path purpose 3..Induction is propagated mainly by conventional measures such as reasonable line arrangement and shieldings between blocking circuit, repeats no more here.
Minimum distance between present embodiment ultrasound wave transmitting terminal 12 and the ultrasound wave receiving end 13 is greater than 25cm, and the height of sound barrier dividing plate 14 is greater than 8cm.
Be not enough to influence reception and the judgement of normal echo as long as the measure that intercepts can make the wave beam of " short circuit " decay to, just can realize the elimination of blind area.
The structural drawing of present embodiment dead zone-eliminating as shown in Figure 4.
Above-listed detailed description is at the specifying of the utility model possible embodiments, and this embodiment is not in order to limiting claim of the present utility model, does not allly break away from the equivalence that the utility model does and implements or change, all should be contained in the claim of this case.
Claims (3)
- One kind can dead zone-eliminating the structure of ultrasonic detection device, ultrasonic detection device comprises holder (11), is respectively equipped with ultrasound wave transmitting terminal (12) and ultrasound wave receiving end (13) on the holder (11);It is characterized in that: ultrasound wave transmitting terminal (12) and ultrasound wave receiving end (13) maintain predetermined spacing and are connected on the described holder (11), between ultrasound wave transmitting terminal (12) and ultrasound wave receiving end (13), be provided with sound barrier dividing plate (14), be arranged on ultrasound wave receiving sensor (131) that ultrasound wave emission sensor (121) that ultrasound wave transmitting terminal (12) locates and ultrasound wave receiving end (13) locate respectively and shock insulation rubber cushion (15) is set between the holder (11).
- 2. the structure of a kind of ultrasonic detection device that can dead zone-eliminating as claimed in claim 1, it is characterized in that: described ultrasound wave emission sensor (121) is at least 2, ultrasound wave receiving sensor (131) is at least 2.
- 3. the structure of a kind of ultrasonic detection device that can dead zone-eliminating as claimed in claim 1, it is characterized in that: the front end at each ultrasound wave emission sensor (121), ultrasound wave receiving sensor (131) connects the loudspeaker (16) with predetermined curved surface respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320071137 CN203178487U (en) | 2013-02-06 | 2013-02-06 | Structure of ultrasonic wave detection device capable of eliminating blind area |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320071137 CN203178487U (en) | 2013-02-06 | 2013-02-06 | Structure of ultrasonic wave detection device capable of eliminating blind area |
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| CN203178487U true CN203178487U (en) | 2013-09-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201320071137 Expired - Fee Related CN203178487U (en) | 2013-02-06 | 2013-02-06 | Structure of ultrasonic wave detection device capable of eliminating blind area |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109270540A (en) * | 2018-11-05 | 2019-01-25 | 浙江大学 | Continuous ultrasound Wave ranging device and method based on micro electronmechanical piezoelectric ultrasonic transducer array |
| CN112697233A (en) * | 2020-12-15 | 2021-04-23 | 大连汇林测控技术有限公司 | Low-blind-area ultrasonic material level sensor |
-
2013
- 2013-02-06 CN CN 201320071137 patent/CN203178487U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109270540A (en) * | 2018-11-05 | 2019-01-25 | 浙江大学 | Continuous ultrasound Wave ranging device and method based on micro electronmechanical piezoelectric ultrasonic transducer array |
| CN109270540B (en) * | 2018-11-05 | 2023-11-28 | 浙江大学 | Continuous ultrasonic ranging device and method based on micro-electromechanical voltage ultrasonic transducer array |
| CN112697233A (en) * | 2020-12-15 | 2021-04-23 | 大连汇林测控技术有限公司 | Low-blind-area ultrasonic material level sensor |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130904 Termination date: 20220206 |
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| CF01 | Termination of patent right due to non-payment of annual fee |