GB2076610A - A Radar Unit Mounting Structure - Google Patents
A Radar Unit Mounting Structure Download PDFInfo
- Publication number
- GB2076610A GB2076610A GB8115761A GB8115761A GB2076610A GB 2076610 A GB2076610 A GB 2076610A GB 8115761 A GB8115761 A GB 8115761A GB 8115761 A GB8115761 A GB 8115761A GB 2076610 A GB2076610 A GB 2076610A
- Authority
- GB
- United Kingdom
- Prior art keywords
- radar unit
- floor panel
- horn antenna
- automobile
- window
- 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.)
- Withdrawn
Links
Classifications
-
- 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
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
- G01S13/50—Systems of measurement based on relative movement of target
- G01S13/58—Velocity or trajectory determination systems; Sense-of-movement determination systems
- G01S13/60—Velocity or trajectory determination systems; Sense-of-movement determination systems wherein the transmitter and receiver are mounted on the moving object, e.g. for determining ground speed, drift angle, ground track
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
- B60T8/17—Using electrical or electronic regulation means to control braking
- B60T8/171—Detecting parameters used in the regulation; Measuring values used in the regulation
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/27—Adaptation for use in or on movable bodies
- H01Q1/32—Adaptation for use in or on road or rail vehicles
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/27—Adaptation for use in or on movable bodies
- H01Q1/32—Adaptation for use in or on road or rail vehicles
- H01Q1/3208—Adaptation for use in or on road or rail vehicles characterised by the application wherein the antenna is used
- H01Q1/3233—Adaptation for use in or on road or rail vehicles characterised by the application wherein the antenna is used particular used as part of a sensor or in a security system, e.g. for automotive radar, navigation systems
Landscapes
- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Computer Security & Cryptography (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Radar Systems Or Details Thereof (AREA)
- Details Of Aerials (AREA)
- Support Of Aerials (AREA)
Abstract
Provided is a mounting structure for mounting on the floor panel 6 of an automobile a Doppler radar unit (7) for detecting the ground speed of the automobile. The Doppler radar unit (7) has an integral construction having a horn antenna 10 and a casing 70 which encases a transmitting/ receiving module 12, a processing circuit 14 and a power supply 15. Only the window 10a provided at a diverging end of the horn antenna 10 is exposed to the ground through an opening formed in the floor panel 6 of the automobile. In consequence, the major part of the Doppler radar unit (7) is concealed to avoid any contact with the ground surface and contamination by dusts and mud. In addition, the electric wires 30 can be laid at the upper surface of the floor panel 6, so that the works for mounting and demounting the radar unit 7 are very much facilitated. Also, maintenance and adjustment are facilitated thanks to enhanced accessibility. <IMAGE>
Description
SPECIFICATION
A Radar Unit Mounting Structure
The present invention relates to a mounting structure for mounting a radar unit and, more particularly, to a mounting structure for mounting a radar unit on the floor panel of chassis of an automobile.
Doppler radar units have been used as a device for detecting the ground speed of an automobile.
It is absolutely important to directly and correctly detect the ground speed of an automobile, in order to obtain an accurate and correct operation of an anti-skid device of the automobile. For detecting the ground speed of the automobile correctly by a Doppler radar unit, the electric wave emitted from the Doppler radar unit has to be directed obliquely toward the road surface. It is also necessary to receive the electric wave reflected by the ground. To this end, the horn antenna of the Doppler radar unit is attached to the chassis of the automobile not vertically to the ground surface but at an inclination to a plane perpendicular to the ground surface.The angle of inclination is preferably about 450. Since the electric wave is directed obliquely toward the ground surface, most parts of the electric wave reflected by the ground surface are not received by the radar antenna. In other words, only weak electric wave irregularly reflected by the ground surface is received by the radar antenna. In order that this weak electric wave is safely caught by the radar antenna, it is necessary to mount the radar antenna as close as possible to the ground surface.
Generally, the Doppler radar unit has an integral construction having a horn antenna and a casing which encases a transmitting-receiving module, a processing circuit and so forth. It is, therefore, difficult to extremely reduce the size of the Doppler radar unit. Particularly, it is extremely difficult to product a thinned Doppler radar unit without being accompanied by deterioration of directivity of the antenna. Therefore, when the
Doppler radar unit is suspended from the lower face of the floor panel, there is a danger that the
Doppler radar unit accidentally contact the ground surface during running of the automobile.
It is also necessary that the Doppler radar unit be mounted in such a manner as to avoid the influence of the noise. From this point of view, it is not recommended to mount the Doppler radar unit in the engine compartment in which the level of ignition noise is specifically high.
Under these circumstances, it has been proposed to mount the Doppler radar unit on the bumper of the automobile. This solution, however, poses other problem. Namely, the electric wave directed forwardly or rearwardly may adversely affect the Doppler radar units of other automobiles or cause other electric wave interference.
Japanese Patent Laid-open No. 44973/80 discloses a mounting structure in which the
Doppler radar unit is mounted in an existing recess formed in the lower face of the floor panel of the chassis. According to this mounting method, however, it is difficult to locate the
Doppler radar unit at the optimum or preferred position. The preferred or optimum mounting position for the Doppler radar unit differs depending on the type of the automobile and, accordingly, cannot be determined decisively.
Thus, this solution also is not satisfactory, completely. Furthermore, the Doppler radar unit as a whole, which is suspended from the floor panel and exposed toward the ground surface, is liable to be contaminated by mud or other contaminants. In addition, it is necessary to lay the electric wiring under the floor panel, and the
Doppler radar unit is accessible only from the lower side of the automobile. This imposes a problem of difficulty in the maintenance.
Accordingly, an object of the invention is to provide a mounting structure for mounting a
Doppler radar unit onto the floor panel of an automobile, capable of overcoming the abovedescribed problems of the prior art.
The mounting structure proposed by the present invention affords a large flexibility of selection of the mounting position for mounting the Doppler radar unit, and eliminates the necessity for laying the electric wiring under the floor panel, thereby to ensure an easier maintenance and better mounting condition.
A preferred embodiment of the invention will be described hereinunder with reference to the accompanying drawing.
Fig. 1 is a Doppler radar unit of the invention in the state attached to the chassis of an automobile;
Fig. 2 is an illustration of an embodiment of the invention;
Fig. 3 is an illustration of a modification of the embodiment shown in Fig. 2;
Fig. 4 is a bottom plan view of the embodiment shown in Fig. 3;
Fig. 5 is a block diagram of a Doppler radar unit; and
Fig. 6 is a schematic illustration of a Doppler radar unit combined with an anti-skid device.
Referring first to Fig. 1 which is a bottom plan view of an ordinary automobile, an engine 1, front wheels 2, a rear wheel axle 3, rear wheels 4 and a propeller shaft 5 are arranged in a manner known per se. A rather flat floor panel 6 is extended.
between the front sheels 2 and the rear wheels 4.
A radar unit 7 is mounted in the floor panel 6 by means of a mounting structure in accordance with the invention.
Fig. 2 shows the detail of the mounting structure in accordance with an embodiment of the present invention.
In this embodiment, an opening 6a for mounting the radar unit is formed in a predetermined portion of the floor panel 6. The radar unit is mounted in this opening with the horn antenna projected outwardly. A moisture proof and dust prevention packing 8 made of a special rubber is disposed between the floor panel 6 and the radar unit 7, and is fixed by means of fixing screws 9. The packing 8 has a collar or flange 8a for surrounding the horn antenna 10 in the opening 6a.
A transmitting-receiving module 12 having an airtight window 11 is connected to the power supply side of the horn antenna 10, while an window 1 Oa formed in the other end of the horn antenna is closed with a plate 13 made of a dielectric material which produces small highfrequency loss to prevent dusts and other foreign objects from coming into the horn antenna.
Tetrafluoroethylene flurocarbon polymers are preferably used as the material of the plate covering the window 1 0a of the horn antenna.
These polymers produce small high-frequency loss and are less liable to be contaminated and, accordingly, can suitably be used as the material for closing the window 1 0a of the horn antenna.
The transmitting-receiving module 12 has a microwave IC construction including a gun diode used as the transmission element and a mixer diode used as a receiving element.
Within the casing 70 of the radar unit, disposed are a processing circuit 14 and a power source 1 5. The upper opening of the casing 70 is closed by a radar unit lid 1 6 having a packing and fixed by means of lid fixing screws 1 7.
The transmission wave from the radar unit is reflected by the ground surface to become a
reflected wave 20 which returns to the horn antenna 10.
A reference numeral 30 denotes a wiring cord which extends through the side wall of the casing
70. The wiring cord 30 is adapted for power feed from the electric power source of the automobile, as well as for the transmission of electric signals to an anti-skid system which will be described
later. In the lead-in portion of the side wall of the
casing 70, a sealing packing 31 is provided to surround the wiring cord 30.
Figs. 3 and 4 show a modification of the
embodiment shown in Fig. 2. In this embodiment, the horn antenna 10 does not project downwardly
from the opening 6a but the window 1 0a of the
horn antenna is flush with the surface of the floor
panel 6 of the chassis. Namely, in this case, the
horn antenna 10 is disposed in the casing 70 of
the radar unit, with the window of the antenna
constituting a part of the wall of the casing 70. As
in the case of the first embodiment shown in Fig.
2, a packing 8 of a special rubbery material is
clamped between the sides of the opening in the
floor panel 6 and the corresponding sides of the
casing 70 for preventing moisture and dust
coming through the gap between the floor panel
6 and the casing 70.
Fig. 5 shows a block diagram of the electric
circuit in the radar unit. The wave transmitted
from the gun transmitter 21 is radiated outwardly
through a directional coupler 22 and the horn
antenna 10. This wave is delivered as a local
transmission signal also to a mixer diode 23.
The reflected wave from the ground surface is
inputted through the directional coupler 22 to the mixer diode 23. The mixer diode 23 delivers, as an output, a Doppler signal which corresponds to the difference of frequency between the local transmission signal and the reflected wave. The
Doppler signal thus produced is then delivered to a comparator 26 through a filter 24 and an amplifier 25. The comparator 26 then provides a pulse signal S corresponding to the automobile ground speed. A power supply 27 is used for supplying electric power of the circuits other than the mixing diode 23.
Fig. 6 schematically shows an anti-skid system for automobiles, incorporating a Doppler radar unit. The radar unit 40, which operates with electric power supplied from batteries 41 mounted on the automobile, is adapted to produce an electric signal corresponding to the ground speed and to deliver the same to a controller 42 which receives also an electric signal coming from a wheel speed sensor 43.
Thus, the controller 42 detects any slip of the wheel, through the comparison between the ground speed derived from the radar unit 40 and the wheel speed coming from the wheel speed sensor 43. The controller 42 delivers a control signal to a modulator 44 which in turn adjusts the operating pressure of the brake system to prevent the slip of the wheel.
As has been described, according to the invention, it is not necessary to reduce the thickness of the Doppler radar unit at a cost of directivity of the antenna, for mounting the
Doppler radar unit under the floor panel where the mounting space is extremely limited. Namely, it is possible to mount a Doppler radar unit equivalent or superior to the conventional one without substantial restriction in the mounting space. The.
mounting can be made in an efficient manner and the Doppler radar unit thus mounted is kept under favourable environment. Namely, the Doppler radar unit is almost free from the contamination or wetting, because the most part of the Doppler radar unit is situated above the level of the floor panel.
In addition, the electric wiring can be laid at the upper side of the floor panel to ensure a good accessibility and, hence, an easier maintenance operation.
Furthermore, the mounting position on the automobile thanks to a wide choice of the position of the opening 6a.
Although the invention has been described through specific terms, it is to be noted here that the described embodiments are only for illustrating purpose, and various changes and modifications are possible within the spirit or scope which is limited soely by the appended
Claims (9)
1. In a structure for mounting a radar unit onto a floor panel of an automobile, said radar unit arranged to detect vehicle ground speed and comprising: a housing encasing a transmittingreceiving module, a processing circuit and a power source therein; and a horn antenna integrally incorporated with said housing and having at its diverged end a window closed with a plate made of electro-wave conductive material, the improvement wherein an opening is defined in said floor panel, through said opening, said window of the horn antenna being exposed underneath said floor panel.
2. A structure as set forth in claim 1, wherein said window of the horn antenna is projected downwardly from said floor panel.
3. A structure as set forth in claim 1, wherein said window the horn antenna is flush with said opening.
4. A structure as set forth in claim 2 or 3, wherein a packing is disposed between said radar and said floor panel.
5. A structure as set forth in claim 4, wherein said packing includes a collar flange portion surrounding said horn antenna.
6. A structure as set forth in claim 1 , wherein said plate closing said window of the horn antenna is made ot tetrafluoroethylene fluorocarbon polymers.
7. A structure as set forth in claim 1, wherein said radar unit is arranged to be used in a antiskid system for an automobile.
8. A mounting structure substantially as hereinbefore described with reference to, and as illustrated in, Fig. 1; or Fig. 2; or Fig. 2 as modified by Figs. 3 and 4; or Fig. 5; or Fig. 6 of the accompanying drawings.
9. A radar unit substantially as hereinbefore described with reference to, and as illustrated in,
Fig. 1; or Fig. 2; or Fig. 2 as modified by Figs. 3 and 4; or Fig. 5; or Fig. 6 of the accompanying drawings.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6772180A JPS56164970A (en) | 1980-05-23 | 1980-05-23 | Mounting structure for radar device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB2076610A true GB2076610A (en) | 1981-12-02 |
Family
ID=13353099
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8115761A Withdrawn GB2076610A (en) | 1980-05-23 | 1981-05-22 | A Radar Unit Mounting Structure |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JPS56164970A (en) |
| DE (1) | DE3120467A1 (en) |
| GB (1) | GB2076610A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0402345A2 (en) * | 1989-05-29 | 1990-12-12 | Johann Dipl.-Ing. Dr. Theurl | Speed and direction monitor for motor vehicles |
| EP0957371A2 (en) * | 1998-05-11 | 1999-11-17 | Mannesmann VDO Aktiengesellschaft | Radar sensor |
| US6072424A (en) * | 1995-12-05 | 2000-06-06 | Siemens Automotive S.A. | Method for measuring the ground speed of a vehicle by means of radar using reflection of electromagnetic waves from the driving surface |
| US6239738B1 (en) * | 1996-01-03 | 2001-05-29 | Daimler-Benz Aktiengesellschaft | Signal processing method in a motor vehicle radar system and radar system therefor |
| EP3078987A1 (en) * | 2015-04-09 | 2016-10-12 | Toyota Jidosha Kabushiki Kaisha | Arrangement structure for vicinity information detection sensor |
| CN106855617A (en) * | 2016-12-29 | 2017-06-16 | 山东大学 | A kind of tunnel detection detects radar portable carrier and method |
| US10073178B2 (en) | 2015-03-24 | 2018-09-11 | Toyota Jidosha Kabushiki Kaisha | Placement structure for peripheral information detecting sensor, and self-driving vehicle |
| CN111213067A (en) * | 2017-09-01 | 2020-05-29 | 麻省理工学院 | Surface penetrating radar and battery system |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3821215C2 (en) * | 1988-06-23 | 1993-11-18 | Deutsche Aerospace | Speed distance sensor for motor vehicle arrangements |
| DE102004042661A1 (en) * | 2004-04-13 | 2005-11-03 | Mso Messtechnik Und Ortung Gmbh | Motor vehicle with device for contactlessly detecting a motor vehicle' self-movement has radar unit with planar antenna |
| DE102006042344A1 (en) * | 2006-09-08 | 2008-04-03 | Conti Temic Microelectronic Gmbh | Radio arrangement for e.g. remote keyless entry system in passenger car, has antenna electrically connected with radio station by cable, arranged in undersurface of outer side of vehicle and including antenna units |
| DE102007031863A1 (en) * | 2007-07-04 | 2009-01-08 | Siemens Ag | radar device |
| US9828036B2 (en) | 2015-11-24 | 2017-11-28 | Srg Global Inc. | Active grille shutter system with integrated radar |
| DE102015224924A1 (en) * | 2015-12-10 | 2017-06-14 | Bayerische Motoren Werke Aktiengesellschaft | Sensor device, outer wall with sensor device and motor vehicle |
-
1980
- 1980-05-23 JP JP6772180A patent/JPS56164970A/en active Pending
-
1981
- 1981-05-22 DE DE19813120467 patent/DE3120467A1/en not_active Withdrawn
- 1981-05-22 GB GB8115761A patent/GB2076610A/en not_active Withdrawn
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0402345A2 (en) * | 1989-05-29 | 1990-12-12 | Johann Dipl.-Ing. Dr. Theurl | Speed and direction monitor for motor vehicles |
| EP0402345A3 (en) * | 1989-05-29 | 1992-10-28 | Johann Dipl.-Ing. Dr. Theurl | Speed and direction monitor for motor vehicles |
| US6072424A (en) * | 1995-12-05 | 2000-06-06 | Siemens Automotive S.A. | Method for measuring the ground speed of a vehicle by means of radar using reflection of electromagnetic waves from the driving surface |
| US6239738B1 (en) * | 1996-01-03 | 2001-05-29 | Daimler-Benz Aktiengesellschaft | Signal processing method in a motor vehicle radar system and radar system therefor |
| EP0957371A2 (en) * | 1998-05-11 | 1999-11-17 | Mannesmann VDO Aktiengesellschaft | Radar sensor |
| EP0957371A3 (en) * | 1998-05-11 | 2001-05-30 | Mannesmann VDO Aktiengesellschaft | Radar sensor |
| US10073178B2 (en) | 2015-03-24 | 2018-09-11 | Toyota Jidosha Kabushiki Kaisha | Placement structure for peripheral information detecting sensor, and self-driving vehicle |
| EP3078987A1 (en) * | 2015-04-09 | 2016-10-12 | Toyota Jidosha Kabushiki Kaisha | Arrangement structure for vicinity information detection sensor |
| US10144424B2 (en) | 2015-04-09 | 2018-12-04 | Toyota Jidosha Kabushiki Kaisha | Arrangement structure for vicinity information detection sensor |
| CN106855617A (en) * | 2016-12-29 | 2017-06-16 | 山东大学 | A kind of tunnel detection detects radar portable carrier and method |
| CN111213067A (en) * | 2017-09-01 | 2020-05-29 | 麻省理工学院 | Surface penetrating radar and battery system |
| CN111213067B (en) * | 2017-09-01 | 2024-04-12 | 麻省理工学院 | Surface penetrating radar and battery system |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS56164970A (en) | 1981-12-18 |
| DE3120467A1 (en) | 1982-06-09 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |