EP0235372B1 - Infraroter Strahldetektor - Google Patents
Infraroter Strahldetektor Download PDFInfo
- Publication number
- EP0235372B1 EP0235372B1 EP19860116444 EP86116444A EP0235372B1 EP 0235372 B1 EP0235372 B1 EP 0235372B1 EP 19860116444 EP19860116444 EP 19860116444 EP 86116444 A EP86116444 A EP 86116444A EP 0235372 B1 EP0235372 B1 EP 0235372B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- infrared ray
- detecting elements
- detector according
- mirror means
- mirror
- 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
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Images
Classifications
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B13/00—Burglar, theft or intruder alarms
- G08B13/18—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength
- G08B13/189—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems
- G08B13/19—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems using infrared-radiation detection systems
Definitions
- the present invention relates to an infrared ray detector of dual structure employing infrared ray detecting elements for detecting an intruder or the like.
- EP-A-0 080 114 describes an infrared ray detector of dual structure having two electrically connected pyroelectric infrared ray detecting elements which are mounted adjacent each other with a shield disposed between them.
- the shield projects forward from the two elements at an angle which may be 90°. It may be mounted within or external to a housing and be formed of a material which may either partially or fully absorb or reflect infrared energy.
- a set of lenses is arranged in an arcuate pattern in front of the sensing elements producing a plurality of fields of view.
- the just mentioned lenses help to provide distinct signals of high amplitude from certain directions.
- the lenses need space and they have to be fixed to a holder.
- the infrared ray detector of the present invention comprises:
- the detector of the present invention also uses a shield means, as the detector of the prior art, however, it does not use a lense.
- the shield means is a mirror means arranged in a predetermined relation against the detecting elements. Due to this construction, distinct signals of high amplitude can be received from different directions without using lenses.
- an infrared ray sensor 20 is in the so-called dual structure formed by a pyroelectric member 20c which is provided thereon with two infrared ray detecting elements 20a and 20b.
- At least one mirror member 21 is upwardly provided in the light receiving area of the infrared ray sensor 20. Namely, the mirror member 21 is arranged in a plane extending between the infrared ray detecting elements 20a and 20b to separate the same on both sides thereof.
- the mirror member 21 has reflective surfaces on both sides to reflect heat rays (far-infrared rays) radiated from a detected object, which heat rays are in turn incident upon the infrared ray detecting element 20a or 20b.
- the infrared ray detecting elements 20a and 20b directly receive heat rays 23 radiated from an object 22 Positioned in a point (A) separated from the infrared ray sensor 20.
- the infrared ray detecting element 20a receives the heat rays in an amount 24a of direct incidence as well as an amount 24b reflected by the mirror member 21 while incidence of the heat rays is restricted or intercepted with respect to the other infrared ray detecting element 20b.
- both of the infrared ray detecting elements 20a and 20b directly receive the heat rays emitted from the object 22.
- Fig. 3 conceptually shows output signals from the infrared ray detecting elements 20a and 20b in this case.
- Symbol a denotes output levels upon direct incidence of the heat rays and symbol b denotes an output level upon incidence of the amount 24b of heat rays reflected by the mirror member 21 on the infrared detecting element 20a.
- differential output from the infrared ray sensor 20, i.c., added output of the infrared ray detecting elements 20a and 20b connected in an opposite-polarity manner is as shown in Fig.
- the output signal b with superpose of the amount 24b reflected by the mirror member 21 is approximately doubled in output level in comparison with the output signal a with only the amount of direct incidence and is at a high frequency level.
- the peak value of the output signal b depends on the reflection coefficient of the mirror member 21.
- the pulse width of the output signal b depends on the height h of the mirror member 21, i.e., the distance from the light receiving surface, the width w of the mirror member 21 and the space s between the infrared ray detecting elements 20a and 20b as shown in Fig. 1.
- the space s is generally constant, and hence the height h and the width w of the mirror member 21 are appropriately determined in design.
- the width w of the mirror member 21 is so determined as to temporarily restrict, or preferably prevent incidence of the heat rays upon the infrared ray detecting elements 20a and 20b, and hence the mirror member 21 may be reduced in size.
- Dot lines a1 and b1 in Fig. 10 denote output levels in such case where difference phase is caused in the heat rays entering the infrared ray detecting elements 20a and 20b by the space s , and differential output levels in this case are shown by dot lines a and d in Fig. 4.
- a two-dot chain line 25 denotes the plane separating the infrared ray detecting elements 20a and 20b.
- the infrared ray detecting element 20b receives an amount 26a of direct incidence in superpose with a reflected amount 26b. It is obviously understood from Figs. 3 and 4 that the output levels are symmetrical with respect to a point (B) as the result.
- an infrared ray sensor 20 of dual structure is formed by a pyroelectric member 20c provided thereon with two infrared ray detecting elements 20a and 20b.
- the back surface of the pyroelectric member 20c is fixed to a ceramic substrate (not shown) through an electrode, and the infrared ray sensor 20 is contained in a case 27 having an entrance window as shown in Figs. 5 and 6.
- a U-shaped mirror member 29 is provided in a plane separating the two infrared ray detecting elements 20a and 20b across a light receiving surface 28 of the infrared ray detector 20.
- the mirror member 29 has optical reflective surfaces on both sides thereof, and is about 0.5 mm in thickness and about 6 to 7 mm in length (width) in a direction perpendicular to the light receiving surface 28.
- the case 27 is made of plastic, and contains an FET, a filter circuit and the like.
- Numeral 30 denotes terminals.
- the infrared ray detecting elements 20a and 20b receive the heat rays 23 emitted from the intruder 22, thereby to develop smoothly increased output voltages a1 and b1 as shown in Fig. 7.
- the mirror member 21 starts serving as a shield means for the infrared ray detecting member 20b with the intruder 22 along the arrow, whereby the infrared ray detecting element 20b is completely shielded against the heat rays and the output voltage thereof becomes zero as shown by b2 in Fig. 7.
- the infrared ray detecting element 20a receives the heat rays in the amount 24b reflected by the mirror member 21 in addition to the amount 24a directly received from the intruder 22, and the total amount of heat rays entering the infrared ray detecting element 20a is substantially twice that of direct incidence.
- the output voltage developed in the infrared ray detecting element 20a is abruptly increased as shown by a2 in Fig. 7.
- the mirror member 21 terminates reflection of the heat rays with respect to the infrared ray detecting element 20a.
- a two-dot chain line 31 in Fig. 7 indicates such case where the human body 22 is in a position right in front of the mirror member 21, in which the heat rays directly apply the infrared ray detecting element 22b.
- the infrared ray detecting element 20a With further movement of the intruder 22, the infrared ray detecting element 20a is in turn shielded against the heat rays by the mirror member 21, whereby its output voltage is abruptly lowered as shown by a3 in Fig. 7. Thereafter the infrared ray detecting element 20a is released from the influence by the mirror member 21 to again receive the heat rays directly from the intruder 22.
- the infrared ray detecting element 20b additionally receives the amount 26b of heat rays reflected by the mirror member 21 with the movement of the intruder 22, whereby its output voltage is temporarily increased as shown by b3 in Fig. 7.
- output obtained from the infrared ray sensor 20 appears as differential output of the output signals from the infrared ray detecting elements 20a and 20b, and hence pulse-like output signals a and b having high peak values are obtained as shown in Fig. 8. Since the mirror member 21 exerts influence on the velocity of the intruder 22 for a short time, the output signals a and b are higher in amplitude than output signals V a and V b with direct incidence of the heat rays.
- Fig. 9 illustrates an example of an amplifier employed in the present invention and contained in the case 27.
- the infrared detecting elements (detectors) 20a and 20b are connected in series with each other in an opposite-polarity manner, and output signals thereof are supplied to an amplifier AMP through an impedance conversion circuit formed by a field-effect transistor (FET).
- An electrical active filter circuit formed by a capacitor C and a resistor R is connected to the input part of the amplifier AMP, whose negative feedback circuit is formed by a capacitor C1 and a resistor R1.
- the amplifier AMP is so formed as to be in such bandwidth corresponding to the band of the signals obtained from the infrared ray sensor 20 as shown in Fig. 10.
- the lower cut-off frequency f1 of the bandwidth is determined by the capacitor C and the resistor R, while the higher cut-off frequency f2 is determined by the capacitor C1 and the resistor R1.
- the output frequency of the infrared ray sensor according to this embodiment can be increased to about 10 Hz in comparison with the conventional case of about 1 Hz, and hence, e.g., the capacitor C for determining the lower cut-off frequency f1 can be minimized to about 1/13 in volume ratio, whereby the intruder infrared ray detector can be remarkably reduced in size.
- Figs. 11 and 12 respectively illustrate directivity of a sensing region of the inventive infrared ray detector provided with the mirror member 29.
- a sensing region in the plane of the X and Y axes is wider along the plan of the mirror member 29, i.e., along the X axis and narrower in the direction perpendicular to the plane of the mirror member 29, i.e., along the Y axis, as obvious from Fig. 11.
- a sensing region in the plane of the Y and Z axes protrudes in a direction perpendicular to the light receiving surface 28, i.e., along the Z axis as shown in Fig. 12.
- the sensing region has directivity by provision of the mirror member 29.
- the infrared ray detector according to the present invention may be mounted on, e.g., the ceiling of a passageway to provide a watching space across the detecting zone.
- a light transmission restricting panel 32 as shown in Fig. 13 may be provided in the light receiving area.
- difference phase is caused by the gap between infrared ray detecting elements 20a and 20b upon incidence of heat rays.
- the infrared ray detecting element 20b develops an output signal with a phase delay when compared to that of the infrared ray detecting element 20a, and differential output from the infrared ray sensor 20 includes signals c and d having low peak values and low frequency levels and signals a and b having high peak values and high frequency levels as shown in Fig. 14.
- the low-frequency signals c and d are removed by a band-pass filter as shown in Fig. 9, so that the high-frequency signals a and b are outputted from the infrared ray sensor 20.
- the fourth embodiment is a modification of the embodiment as shown in Figs. 1 and 4, and is provided with a plurality of mirror members as shield members.
- Fig. 17 is a sectional view showing the third embodiment.
- An infrared ray sensor 50 of dual structure is formed by a pyroelectric member provided thereon with two parallel-connected infrared ray detecting elements and fixed to one surface of a ceramic substrate 56, to be contained in a metal case 58 having an entrance window 57 sealed by window material.
- An impedance conversion circuit 59 is arranged on the other surface of the ceramic substrate 56, to provide an independent sensor portion 60 as a whole.
- the sensor portion 60 is mounted in a central space 62 of a frame member 61 made of plastic, with the entrance window 57 directed to the exterior.
- Six mirror members 63 are upwardly provided at regular intervals along the central space 62, to be covered by a plastic cover 64.
- the frame member 61 is formed in the side provided with the mirror member 63, i.e., in the front surface thereof with a ring-shaped groove 65 concentric with the space 62, while through-holes 66 are provided in two portions of the bottom of the groove 65 oppositely through the space 62.
- the mirror members 63 are partially integrally connected to a ring-shaped base portion 67 at the bottom sides thereof, to be directed to the center of the ring-shaped base portion 67.
- the ring-shaped base portion 67 is inserted in the ring-shaped groove 65 of the frame member 61 so that bottom edges 68 of the mirror members 63 are placed in intervals 70 between respective protrusions 69 to fix the spaces therebetween.
- the size of each mirror member 63 in the central direction is selected to be in such length that its forward end portion protrudes in the central space 62 of the frame member 61 not to reach the center thereof, e.g., 6 to 10 mm.
- each mirror member 63 has an arcuate outer edge 71, whose height is about 5 to 12 mm.
- This mirror member 63 is prepared by pressing or bending metal such as iron, nickel and phosphor bronze, and both surfaces thereof are specularly worked by plating, evaporating or sputtering of chromium, aluminum or the like to provide optical reflective surfaces reflecting the light having the wavelength of 5-10 ⁇ m, which are about 0.1 to 0.5 mm in thickness.
- the plastic cover 64 is prepared by infrared transparent material such as polyethylene resin which transmits infrared rays of 5 to 10 ⁇ m in wavelength emitted from an intruder, and its thickness is about 0.5 mm.
- the frame member 61 can be divided into two parts along a mating face 72, and is provided therein with a circuit 73 for processing signals detected by the infrared ray sensor 50.
- This circuit 73 is formed by an electrical active filter circuit and an amplifier similarly to the circuit as shown in Fig. 9, and may contain a DC power supply circuit, AC power rectifying circuit, a DC amplifier, a comparator, a converter and the like at need.
- Fig. 17 shows actual output V from the infrared ray detecting elements 50a and 50b in this embodiment.
- the heat rays emitted from the intruder straightly and simultaneously apply the infrared ray detecting elements 50a and 50b from a point separated from the infrared ray sensor 50. Therefore, output voltages a1 and a2 of the infrared ray detecting elements 50a and 50b are smoothly increased with approach of the intruder to reach saturation points.
- the mirror member serves as a thermal shield to one of the infrared ray detecting elements 50a and 50b to completely shield the same against the heat rays emitted from the intruder, whereby the output level of the infrared ray detecting element becomes zero as shown by b2.
- the other infrared ray detecting element receives the heat rays reflected by the mirror member in addition to those directly emitted from the intruder, and the amount of the heat rays as received is substantially twice that of direct incidence.
- the output voltage a2 of the other infrared ray detecting element is abruptly increased.
- both of the infrared ray detecting elements receive only heat rays directly emitted from the intruder.
- the two-dot chain line 55 denotes such case where the intruder moves to a point directly in front of the mirror member.
- the other infrared detecting ray element is in turn shielded by the mirror member to form a trough a3 and a peak b3.
- the output from the infrared ray sensor 50 appears as the differential output of the infrared ray detecting elements 50a and 50b, to provide pulse-like output voltages b and c higher in peak value than output voltages a and d with only direct incidence of heat rays, similarly to the case shown in Fig. 4. Further, the output voltages b and c are at high frequency levels since the mirror members exert influence on the velocity of movement of the intruder for a short time.
- this embodiment employs six mirror members 63a to 63f each having the aforementioned function.
- the sensing region in this case is remarkably enlarged in comparison with a sensing region 74 with no mirror member provided, on a plane formed by an X axis in the horizontal direction of Fig. 15 and a Y axis perpendicular thereto in the plane direction of the mirror members 63a to 63f as shown in Fig. 18, with the so-called directivity.
- the reflecting functions of the mirror members are particularly remarkable in the direction of the plane separating the two infrared ray detecting elements 50a and 50b, i.e., on the X axis.
- the number of the mirror members and the relation therebetween are not restricted to the same.
- the mirror members 63e and 63f in Fig. 18 may be removed so that sensitivity is lowered in the upper portion in the drawing.
- the mirror members 63b and 63e may be removed to retain sensitivity in a biased direction.
- the angle between each adjacent pair of the mirror members 63a to 63f is 60° in Fig. 16
- the angle between, e.g., the mirror members 63b and 63c may be 120°.
- the number of and the angle between the mirror members in this embodiment can be freely determined in design.
- the sensing region is remarkably extended along the X axis while the same is not much extended in other directions as obvious from Fig. 18. This is because the amount of reflected light is decreased by the angles of arrangement of the mirror members 63b, 63c, 63e and 63f.
- circular three-terminal infrared ray detecting elements 75 and 76 as shown in Fig. 19, each comprising two series-connected infrared ray detecting elements in a concentric manner while electrodes 75a, 75b, 76a and 76b on both ends are displaced by 90° in position.
- the infrared ray detecting elements 75 and 76 are substantially identical in area so as to generate identical output signals upon incidence of the same amount of heat rays. Further, the infrared ray detecting elements 75 and 76 are polarized in the directions of the electrodes 75c and 76c in both side portions thereof as shown by arrows, while these infrared ray detecting elements 75 and 76 are connected in a parallel manner to, e.g., an impedance conversion circuit.
- the sensing region can be prevented from extension in a specific direction (along X axis) as shown in Fig. 18, so that the sensing region can be made substantially even along the plane direction of crosswisely arranged mirror members 77a to 77d as shown in Fig. 20.
- Such an infrared ray sensor is effectively mounted on, e.g., the ceiling of a diverging point of a detecting zone.
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
- Geophysics And Detection Of Objects (AREA)
Claims (13)
- Infrarotdetektor in Dualanordnung (20, 50) zweier elektrisch verbundener pyroelektrischer Infrarot-Detektorelemente, mit- einem Paar pyroelektrischer Infrarot-Detektorelemente (20a, 20b; 50a, 50b) 75, 76) mit im wesentlichen identisch ausgerichteteten Lichtempfangsflächen jedoch entgegengesetzten Polaritäten, die elektrisch miteinander verbunden sind und ein der Differenz zwischen ihren Potentialen entsprechendes Ausgangssignal liefern, und- einer Spiegeleinrichtung (21; 29; 63a - 63f), die in vorgegebener Entfernungvorden Lichtempfangsoberflächen angeordnet ist und eine bestimmte Breite aufweist, derart, daß eineinfallender Infrarotstrahl auf eines der Detektorelemente des Paars begrenzt wird, während das einfallende Infrarotlicht direkt aufdie Lichtempfangsfläche des anderen Detektorelementes auftrifft, das ebenfalls reflektiertes Infrarotlicht von der Spiegeleinrichtung empfängt.
- Detektor nach Anspruch 1, bei dem die Spiegeleinrichtung (21, 29, 63a - 63f) mit reflektierenden Flächen auf beiden Seiten versehen ist.
- Detektor nach einem der Ansprüche 1 oder 2, bei dem mehrere Spiegel (63a - 63f) in einer Anordnung vorhanden sind, bei der einer der Spiegel In einer Ebene ausgerichtet ist, die sich zwischen den Infrarot-Detektorelementen (50a, 50b) erstreckt, wodurch erdie beiden so trennt, daß sie zu beiden Seiten des Spiegels liegen.
- Detektor nach einem der vorangehenden Ansprüche, bei dem jeder Spiegel der Spiegeleinrichtung ein sektorförmiges Trägerteil (29) mit einer Aussparung in seinem mittleren Bereich ist.
- Detektor nach einem der vorangehenden Ansprüche mit- einem Rahmenteil (61) mit einer Signal-Verarbeitungsschaltung (73), einem ringförmigen Graben (65) in einer Oberfläche und einem mittleren Raum (63) in der Mitte;- einem Sensorbereich (60) im mittleren Raum;- einem Basisbereich (67) der Spiegeleinrichtung, der in den ringförmigen Graben eingesetzt ist, wobei die Spiegeleinrichtung aus mehreren Spiegeln (63a - 63f) besteht, die integral mit dem Graben verbunden und in Ebenen angeordnet sind, die eine Mittellinie enthalten, wobei sich die Spiegel nicht berühren; und mit- einer durchsichtigen Abdeckung (64) für die Spiegeleinrichtung.
- Detektor nach Anspruch 5, bei dem die Verarbeitungsschaltung ein Bypassfilter, einen Verstärker und ein Tiefpaßfilter mit einem Kondensator (C₁) und einem Widerstand (R₁) als Rückkopplung aufweist, und als Bandpaßfilter für die Ausgangssignale der Infrarot-Detektorelemente (20a, 20b, 50a, 50b) ausgebildet ist.
- Detektor nach einem der vorangehenden Ansprüche, der ein Keramiksubstrat (56) mit einer vorderen und einer hinteren Fläche aufweist, wobei das Detektorelementpaar (20a, 20b; 50a, 50b) mit der vorderen Fläche des Keramiksubstrats verbunden und eine Impedanzschaltung auf der hinteren Seite des Keramiksubstrats angeordnet ist.
- Detektor nach einem der Ansprüche 5 bis 7, bei dem das Rahmenteil einander gegenüberliegende Durchgangslöcher (66) an zwei Positionen am Boden des ringförmigen Grabens (65) aufweist.
- Detektor nach einem der vorangehenden Ansprüche, bei dem die Spiegeleinrichtung sechs Spiegel (63a - 63f) aufweist.
- Detektor nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß die Spiegeleinrichtung Spiegel mit einem gegenseitigen Winkelabstand von 60° aufweist.
- Detektor nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, daß die Spiegeleinrichtung Spiegel mit einem gegenseitigen Winkelabstand von 120° aufweist.
- Detektornach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, daß die Spiegeleinrichtung vier Spiegel aufweist, die kreuzweise unter einem Winkel von 90° angeordnet sind.
- Detektor nach einem der vorangehenden Ansprüche, bei dem die Detektorelemente des Paars ringförmige Infrarot-Detektorelemente (75, 76) mit drei Anschlüssen sind, wobei jedes Detektorelement zwei konzentrisch angeordnete und in Reihe geschaltete Infrarot-Detektorelemente und Elektroden (75a, 75b, 76a, 76b) an den beiden um 90° gegeneinander versetzten Enden aufweist,welche Detektorelemente in Richtung der Elektroden an ihren beiden Endbereichen polarisiert und parallel geschaltet sind.
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP29827/86 | 1986-02-12 | ||
JP61029827A JPS62187277A (ja) | 1986-02-12 | 1986-02-12 | 焦電型赤外線検出装置 |
JP54398/86 | 1986-03-11 | ||
JP61054398A JPS62209325A (ja) | 1986-03-11 | 1986-03-11 | 焦電形赤外線検出装置 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0235372A2 EP0235372A2 (de) | 1987-09-09 |
EP0235372A3 EP0235372A3 (en) | 1988-09-21 |
EP0235372B1 true EP0235372B1 (de) | 1992-02-05 |
Family
ID=26368074
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19860116444 Expired EP0235372B1 (de) | 1986-02-12 | 1986-11-26 | Infraroter Strahldetektor |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0235372B1 (de) |
DE (1) | DE3683843D1 (de) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6485081B1 (en) | 1999-03-24 | 2002-11-26 | Donnelly Corporation | Safety system for a closed compartment of a vehicle |
US6692056B2 (en) | 1999-03-24 | 2004-02-17 | Donnelly Corporation | Safety release for a trunk of a vehicle |
US6768420B2 (en) | 2000-11-16 | 2004-07-27 | Donnelly Corporation | Vehicle compartment occupancy detection system |
US6783167B2 (en) | 1999-03-24 | 2004-08-31 | Donnelly Corporation | Safety system for a closed compartment of a vehicle |
US8258932B2 (en) | 2004-11-22 | 2012-09-04 | Donnelly Corporation | Occupant detection system for vehicle |
US9403501B2 (en) | 2013-11-13 | 2016-08-02 | Magna Electronics Solutions Gmbh | Carrier system and method thereof |
US9405120B2 (en) | 2014-11-19 | 2016-08-02 | Magna Electronics Solutions Gmbh | Head-up display and vehicle using the same |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0296766B1 (de) * | 1987-06-19 | 1994-12-14 | Sanyo Electric Co., Ltd. | Einbruchdetektorsystem |
US6166625A (en) * | 1996-09-26 | 2000-12-26 | Donnelly Corporation | Pyroelectric intrusion detection in motor vehicles |
US6597287B1 (en) | 1998-04-15 | 2003-07-22 | Steinel Gmbh & Co. Kg | Sensor device and method for operating a sensor device |
US6086131A (en) | 1999-03-24 | 2000-07-11 | Donnelly Corporation | Safety handle for trunk of vehicle |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2734157A1 (de) * | 1958-02-22 | 1979-02-01 | Heimann Gmbh | Passiver infrarot-alarmgeber |
BE793058A (fr) * | 1971-12-20 | 1973-06-20 | Barnes Eng Co | Detecteur d'intrusion |
US4258255A (en) * | 1979-04-23 | 1981-03-24 | American District Telegraph Company | Infrared intrusion detection system |
CH657928A5 (de) * | 1981-11-25 | 1986-09-30 | Eltec Instr Ag | Anordnung fuer einen strahlungsdetektor mit mehreren sensorelementen und deren verwendung. |
-
1986
- 1986-11-26 DE DE8686116444T patent/DE3683843D1/de not_active Expired - Lifetime
- 1986-11-26 EP EP19860116444 patent/EP0235372B1/de not_active Expired
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6485081B1 (en) | 1999-03-24 | 2002-11-26 | Donnelly Corporation | Safety system for a closed compartment of a vehicle |
US6692056B2 (en) | 1999-03-24 | 2004-02-17 | Donnelly Corporation | Safety release for a trunk of a vehicle |
US6783167B2 (en) | 1999-03-24 | 2004-08-31 | Donnelly Corporation | Safety system for a closed compartment of a vehicle |
US6768420B2 (en) | 2000-11-16 | 2004-07-27 | Donnelly Corporation | Vehicle compartment occupancy detection system |
US8258932B2 (en) | 2004-11-22 | 2012-09-04 | Donnelly Corporation | Occupant detection system for vehicle |
US9403501B2 (en) | 2013-11-13 | 2016-08-02 | Magna Electronics Solutions Gmbh | Carrier system and method thereof |
US9405120B2 (en) | 2014-11-19 | 2016-08-02 | Magna Electronics Solutions Gmbh | Head-up display and vehicle using the same |
Also Published As
Publication number | Publication date |
---|---|
EP0235372A3 (en) | 1988-09-21 |
DE3683843D1 (de) | 1992-03-19 |
EP0235372A2 (de) | 1987-09-09 |
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