JPS6239520Y2 - - Google Patents
Info
- Publication number
- JPS6239520Y2 JPS6239520Y2 JP7381482U JP7381482U JPS6239520Y2 JP S6239520 Y2 JPS6239520 Y2 JP S6239520Y2 JP 7381482 U JP7381482 U JP 7381482U JP 7381482 U JP7381482 U JP 7381482U JP S6239520 Y2 JPS6239520 Y2 JP S6239520Y2
- Authority
- JP
- Japan
- Prior art keywords
- proximity sensor
- receiver
- vehicle
- reflected
- distance
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 238000001514 detection method Methods 0.000 description 11
- 230000005855 radiation Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000013459 approach Methods 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
Landscapes
- Radar Systems Or Details Thereof (AREA)
- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
Description
【考案の詳細な説明】
(1) 本考案の技術的分野
本考案は、自動車等の車両に取り付けて衝突防
止あるいは車間距離の検知等に使用される車両用
近接センサーに関するものである。更に詳言すれ
ば、例えば、自動車の後方に取り付け、後方の障
害物までの距離を検知すべく、超音波あるいは電
波等を発射し、障害物からの反射波の信号を受信
器により検知する近接センサーが、該近接センサ
ーの取り付け近傍の大地面及び左側路肩に設置さ
れた障害物等からの反射波を捉えないようにし、
且つ検知範囲をより広くすることが出来、また小
型化することも出来る車両用近接センサーの改良
に関するものである。[Detailed Description of the Invention] (1) Technical Field of the Invention The present invention relates to a vehicular proximity sensor that is attached to a vehicle such as an automobile and used for collision prevention or detection of inter-vehicle distance. More specifically, for example, a proximity sensor is installed at the rear of a car and emits ultrasonic waves or radio waves to detect the distance to an obstacle behind it, and a receiver detects the reflected wave signal from the obstacle. Preventing the sensor from capturing reflected waves from obstacles, etc. installed on the ground and on the left shoulder of the road near where the proximity sensor is installed,
The present invention also relates to an improvement in a vehicle proximity sensor that can have a wider detection range and can also be made smaller.
(2) 従来技術とその問題点
従来から、自動車に取り付けられ、超音波ある
いは電波を障害物に向けて発射し、該反射物から
の反射波を受信して障害物までの距離を検知する
車両用近接センサーは知られているが、一般に検
知しようとする障害物等の対象如何により、超音
波あるいは電波の放射ビームの広がり角度を限定
して小さくし、大地あるいは道路に沿つて存在す
る障害物等からの反射波を捉えないようにしてい
るが、例えば、第１図に示すように自動車１の後
方の安全を確認すべく後部に取り付けられ放射ビ
ーム角度θを有する近接センサー２は、該近接セ
ンサーの受信器２ａからの距離l1の地点Ｐまでの
距離範囲が障害物の検知範囲となる。即ち、地点
Ｐは、大地面Ｙからの反射波ａが近接センサー２
のホーン面２ｂで再反射され受信器２ａへ入射さ
れる最短の限界地点である。しかして地点Ｐより
離れた距離l2の障害物Ｘは自動車１が距離l1に接
近するまで検知出来ない。このように検知範囲を
なす超音波あるいは電波の放射ビーム角度θと検
知可能距離との関係で、比較的距離の離れた地点
の障害物を検知するには、放射ビームの広がり角
度θを極めて小さくしなければならず、そのため
に検知範囲の性能が低下する。あるいは、近接セ
ンサー２のホーン面２ｂの長さＬを大きくしなけ
ればならない等の問題が生じ、また検知範囲を大
きくせんとすれば、検知可能距離は、極めて小さ
くなつてしまう等の欠点を有していた。(2) Prior art and its problems Conventionally, vehicles have been attached to automobiles and emit ultrasonic waves or radio waves toward an obstacle, and detect the distance to the obstacle by receiving the reflected waves from the reflected object. Proximity sensors are known, but generally the spread angle of the ultrasonic or radio wave radiation beam is limited and made small depending on the object such as an obstacle to be detected. For example, as shown in FIG. The distance range from the receiver 2a of the sensor to the point P at a distance l1 becomes the obstacle detection range. That is, at point P, the reflected wave a from the ground plane Y is detected by the proximity sensor 2.
This is the shortest limit point where the signal is re-reflected on the horn surface 2b and is incident on the receiver 2a. Therefore, the obstacle X at a distance l 2 away from the point P cannot be detected until the car 1 approaches the distance l 1 . In this way, due to the relationship between the ultrasonic or radio wave radiation beam angle θ that forms the detection range and the detectable distance, in order to detect obstacles at relatively distant points, the spread angle θ of the radiation beam must be extremely small. This reduces the performance of the detection range. Alternatively, problems arise such as having to increase the length L of the horn surface 2b of the proximity sensor 2, and if the detection range is to be increased, the detectable distance becomes extremely small. Was.
(3) 本考案の目的
本考案は、叙上の欠点に鑑み案出されたもので
あり、即ち、自動車と最も近い大地面及び左側路
肩に設置された障害物から反射される反射波の受
信範囲を極力小さくし、他方検知を所望する障害
物からの反射波の受信範囲及び検知可能距離を極
力大きくし得るように受信器側のホーン部の上方
内壁側及び右方内壁側所定位置に山形の突起部を
設けることにより、検知範囲及び検知可能距離の
性能を低下せしめることなく、小型でコンパクト
な車両用近接センサーを提供することを目的とし
たものである。(3) Purpose of the present invention The present invention was devised in view of the above-mentioned drawbacks, namely, the reception of reflected waves reflected from the ground closest to the vehicle and obstacles installed on the left shoulder of the road. In order to minimize the range and maximize the receiving range and detectable distance of the reflected waves from the obstacle for which detection is desired, chevrons are installed at predetermined positions on the upper inner wall side and the right inner wall side of the horn part on the receiver side. The object of the present invention is to provide a small and compact vehicle proximity sensor without degrading the performance of the detection range and detectable distance by providing the protrusion.
(4) 本考案の構成
本考案に係る車両用近接センサーの好適な実施
例で第３図、第４図及び第５図に基づき詳細に説
明する。(4) Configuration of the Present Invention A preferred embodiment of the vehicle proximity sensor according to the present invention will be described in detail with reference to Figs. 3, 4 and 5.
３は障害物に向けて超音波あるいは電波を発射
する受信器である。４は受信器であり、前記発信
器３から発射された超音波あるいは電波が障害物
Ｘで反射された反射波を受信する受信器である。
しかして、これ等、発信器３及び受信器４の前面
外周部からは、所定の長さで伸びるホーン面５
ａ，５ｂが所定の拡がり角度で円錐状にテーパー
面を形成してなる指向性のホーン部５を具備して
おり、即ち、発信器３側のホーン面５ａは、超音
波あるいは電波の放射ビーム角度θを形成する機
能をなすものである。他方受信器４側のホーン面
５ｂは、前記発信器３から発射され障害物Ｘ等か
ら反射される反射波の受信範囲を限定する機能を
なすものである。しかして、該受信器４側のホー
ン面５ｂの上方内壁側及び右方内壁側には、山形
の突起部５ｃを形成して大地面Ｙ及び左側路肩の
障害物（図示せぜ）からの反射波を受信器４へ入
射させないように所定の大きさで、例えば、第３
図に示す如く形成している。６は電子回路部であ
り、超音波あるいは電波の発射から受信までの時
間おくれから障害物Ｘまでの距離を判断すべく機
能する電子回路で形成されている。 3 is a receiver that emits ultrasonic waves or radio waves toward obstacles. Reference numeral 4 denotes a receiver, which receives the reflected wave of the ultrasonic wave or radio wave emitted from the transmitter 3 and reflected by the obstacle X.
Therefore, from the front outer periphery of the transmitter 3 and receiver 4, there is a horn surface 5 extending a predetermined length.
a and 5b are provided with a directional horn portion 5 formed with a conically tapered surface with a predetermined divergence angle, that is, the horn surface 5a on the side of the transmitter 3 emits an ultrasonic or radio wave radiation beam. It functions to form the angle θ. On the other hand, the horn surface 5b on the side of the receiver 4 functions to limit the reception range of the reflected waves emitted from the transmitter 3 and reflected from the obstacles X and the like. Therefore, a chevron-shaped protrusion 5c is formed on the upper inner wall side and the right inner wall side of the horn surface 5b on the side of the receiver 4 to prevent reflections from the ground plane Y and obstacles on the left road shoulder (not shown). For example, the third
It is formed as shown in the figure. Reference numeral 6 denotes an electronic circuit section, which is formed of an electronic circuit that functions to determine the distance to the obstacle X based on the time delay between emission and reception of ultrasonic waves or radio waves.
尚、７は上記構成でなる当該車両用近接センサ
ーである。 In addition, 7 is the said vehicle proximity sensor which consists of the said structure.
(5) 本考案の作用
本考案に係る車両用近接センサーの好適な一実
施例である第３図に基づき、即ち、自動車（図示
せず）の後部に当該車両用近接センサー７を取り
付け、後方の障害物Ｘを検知せんとする目的とし
て使用した場合を説明する。(5) Effect of the present invention Based on FIG. 3, which is a preferred embodiment of the vehicle proximity sensor according to the present invention, the vehicle proximity sensor 7 is attached to the rear of an automobile (not shown), and A case will be explained in which the object is used for the purpose of detecting an obstacle X.
今、車両用近接センサー７は、例えば、ホーン
部５の長さＬで超音波Ｚを放射ビーム角度θで後
方の障害物に向けて発射している。しかして大地
面Ｙから反射されて受信器４へ入射される反射波
ｄの最短の限界地点は図示の如く、受信器４の最
端部と対角をなすホーン部５の先端Ｒとを結んで
至る地点、即ち、距離l2の地点Ｑとなる。また、
例えば、距離l1の地点Ｐの大地面Ｙから反射され
る反射波Ｃは、ホーン面５ｂの上部に形成された
山形の突起部５ｃの斜面で乱反射されて受信器４
へは入射されない。即ち、直接大地面Ｙと受信器
４とを結ぶ直線上の反射波のみ受信することにな
る。これを同一条件で示す第２図の従来例の車両
用近接センサー２と対比して見ると、従来例の第
２図では距離l1の地点Ｐまでが前記の如く検知可
能距離となり、本考案による第３図では距離l2の
Ｑ地点までが検知可能距離となる。従つて、図示
で明らかの如くl2＞l1であり、l2−l1だけ同一放射
ビーム角度θの検知範囲で検知可能距離が拡大さ
れたことになる。また、逆に言えばホーン部の長
さＬを相当分だけ短縮することも出来る機能をな
すことになる。また、左側路肩に設置された障害
物から反射される反射波に対しても受信器４のホ
ーン面５ｂの右面側に形成された突起部５ｃで、
前記大地面Ｙからの反射波Ｃの場合と同様にして
受信されない作用をなすものである。 For example, the vehicle proximity sensor 7 is emitting an ultrasonic wave Z with a length L of the horn portion 5 at a radiation beam angle θ toward an obstacle behind the vehicle. As shown in the figure, the shortest limit point of the reflected wave d reflected from the ground plane Y and incident on the receiver 4 connects the farthest end of the receiver 4 and the diagonal tip R of the horn section 5. This is the point reached at point Q, that is, the distance l 2 . Also,
For example, a reflected wave C reflected from the ground plane Y at a point P at a distance l1 is diffusely reflected by the slope of the chevron-shaped protrusion 5c formed on the upper part of the horn surface 5b, and is transmitted to the receiver 4.
is not incident on the That is, only reflected waves on a straight line directly connecting the ground plane Y and the receiver 4 are received. Comparing this with the conventional example vehicle proximity sensor 2 shown in FIG. 2 under the same conditions, in the conventional example shown in FIG . In Fig. 3, the detectable distance is the distance l 2 to point Q. Therefore, as is clear from the figure, l 2 > l 1 , and the detectable distance is expanded by l 2 - l 1 within the detection range of the same radiation beam angle θ. Conversely, it also functions to shorten the length L of the horn portion by a considerable amount. Also, the protrusion 5c formed on the right side of the horn surface 5b of the receiver 4 can prevent reflected waves from obstacles placed on the left side of the road.
Similar to the case of the reflected wave C from the ground plane Y, this effect is not received.
以上説明の如く、受信器４のホーン部５のホー
ン面５ｂの上方内壁側及び右方内壁側の所定位置
に山形の突起部５ｃを形成して、受信器４が不必
要な大地面Ｙ及び左側路肩の障害物からの反射波
を捉えないようにすることにより、発射する超音
波あるいは電波の放射ビーム角度θを極力小さく
することなく、即ち、検知範囲を小さくすること
なく、検知可能距離を大きくする機能をなすもの
である。尚、ホーン部５の山形の突起部５ｃは、
当該車両用近接センサー７の車両への取付位置に
応じて、所望方向へ所定の大きさで形成すること
が出来、更に前記以外の特定方向からの不必要な
反射波も捉えないようにすることも出来るもので
ある。 As described above, the chevron-shaped protrusions 5c are formed at predetermined positions on the upper inner wall side and the right inner wall side of the horn surface 5b of the horn portion 5 of the receiver 4, so that the receiver 4 can By not capturing reflected waves from obstacles on the left shoulder of the road, the detectable distance can be increased without reducing the radiation beam angle θ of the emitted ultrasonic waves or radio waves as much as possible, that is, without reducing the detection range. It has the function of increasing the size. Incidentally, the chevron-shaped protrusion 5c of the horn portion 5 is
To be able to form a predetermined size in a desired direction according to the mounting position of the vehicle proximity sensor 7 on the vehicle, and to avoid capturing unnecessary reflected waves from specific directions other than the above. It is also possible.
(6) 本考案の効果
(イ) 車両用近接センサーの使用目的に応じて受信
器側のホーン部に山形の突起部を形成して特定
方向から反射される不要な反射波を、極力捉え
ないようにすることが出来るため、検知範囲の
性能をより向上させることが出来る。(6) Effects of the present invention (a) Depending on the purpose of use of the vehicle proximity sensor, a chevron-shaped protrusion is formed on the horn section on the receiver side to minimize unnecessary reflected waves reflected from a specific direction. Therefore, the performance of the detection range can be further improved.
(ロ) 受信器側のホーン部に山形の突起部を形成す
ることにより、特定方向からの不要な反射波
を、捉えないようにすることが出来るため、ホ
ーン部の大きさをより小型することが出来、コ
ンパクトで安価な車両用近接センサーを提供す
ることが出来る。(b) By forming a chevron-shaped protrusion on the horn section on the receiver side, it is possible to prevent unnecessary reflected waves from a specific direction from being caught, so the size of the horn section can be made smaller. This makes it possible to provide a compact and inexpensive vehicle proximity sensor.
第１図は従来の車両用近接センサーの一実施例
を示す説明図である。第２図は第１図の要部を拡
大した説明図である。第３図は本考案に係る車両
用近接センサーの要部の断面を示す説明図であ
る。第４図は本考案に係る車両用近接センサーの
一実施例を示す正面図である。第５図は第４図の
矢視Ａ−Ａ線方向の断面図である。
３……発信器、４……受信器、５……ホーン
部、５ｃ……突起部。
FIG. 1 is an explanatory diagram showing one embodiment of a conventional vehicle proximity sensor. FIG. 2 is an enlarged explanatory diagram of the main part of FIG. 1. FIG. 3 is an explanatory diagram showing a cross section of the main part of the vehicle proximity sensor according to the present invention. FIG. 4 is a front view showing an embodiment of the vehicle proximity sensor according to the present invention. FIG. 5 is a sectional view taken along the line A--A in FIG. 4. 3... Transmitter, 4... Receiver, 5... Horn part, 5c... Projection part.
Claims (1)
することにより障害物Ｘまでの距離を検知し、か
つ車両の後部に取付けた車両用近接センサーにお
いて、発信器３及び受信器４を装着すると共に開
口部が該受信器４から車両の後方に向けて形成し
た円錐上のホーン面５ｂを備え、該ホーン面５ｂ
の上方内壁及び右方内壁に山形突起部５ｃを設け
たことを特徴とする車両用近接センサー。 In a vehicle proximity sensor that detects the distance to obstacle The section includes a conical horn surface 5b formed from the receiver 4 toward the rear of the vehicle, and the horn surface 5b
A proximity sensor for a vehicle, characterized in that a chevron-shaped protrusion 5c is provided on an upper inner wall and a right inner wall of the vehicle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7381482U JPS58179599U (en) | 1982-05-20 | 1982-05-20 | Vehicle proximity sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7381482U JPS58179599U (en) | 1982-05-20 | 1982-05-20 | Vehicle proximity sensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58179599U JPS58179599U (en) | 1983-12-01 |
| JPS6239520Y2 true JPS6239520Y2 (en) | 1987-10-08 |
Family
ID=30083301
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7381482U Granted JPS58179599U (en) | 1982-05-20 | 1982-05-20 | Vehicle proximity sensor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58179599U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013516606A (en) * | 2009-12-31 | 2013-05-13 | サバンジ・ウニヴェルシテシ | Indoor positioning system based on pseudo satellite with GPS signal and outdoor directional antenna |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0313832Y2 (en) * | 1986-03-18 | 1991-03-28 | ||
| JP2005273414A (en) * | 2004-03-26 | 2005-10-06 | Toto Ltd | Automatic flushing toilet bowl |
-
1982
- 1982-05-20 JP JP7381482U patent/JPS58179599U/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013516606A (en) * | 2009-12-31 | 2013-05-13 | サバンジ・ウニヴェルシテシ | Indoor positioning system based on pseudo satellite with GPS signal and outdoor directional antenna |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58179599U (en) | 1983-12-01 |
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