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WO1992019467A2 - Systeme de feux de detresse utilisant les feux stop en cas d'arret d'urgence - Google Patents

Systeme de feux de detresse utilisant les feux stop en cas d'arret d'urgence Download PDF

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Publication number
WO1992019467A2
WO1992019467A2 PCT/US1992/003457 US9203457W WO9219467A2 WO 1992019467 A2 WO1992019467 A2 WO 1992019467A2 US 9203457 W US9203457 W US 9203457W WO 9219467 A2 WO9219467 A2 WO 9219467A2
Authority
WO
WIPO (PCT)
Prior art keywords
brake
circuit
switch
relay
light
Prior art date
Application number
PCT/US1992/003457
Other languages
English (en)
Other versions
WO1992019467A3 (fr
Inventor
Dong Hwi Lee
Myung Ho Lee
Hea Soon Lee
Original Assignee
Dong Hwi Lee
Myung Ho Lee
Hea Soon Lee
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Dong Hwi Lee, Myung Ho Lee, Hea Soon Lee filed Critical Dong Hwi Lee
Priority to US08/107,855 priority Critical patent/US5404130A/en
Publication of WO1992019467A2 publication Critical patent/WO1992019467A2/fr
Publication of WO1992019467A3 publication Critical patent/WO1992019467A3/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q1/00—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor
    • B60Q1/26—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic
    • B60Q1/44—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic for indicating braking action or preparation for braking, e.g. by detection of the foot approaching the brake pedal
    • B60Q1/445—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic for indicating braking action or preparation for braking, e.g. by detection of the foot approaching the brake pedal controlled by inertial devices
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/22—Arrangements for supervision, monitoring or testing

Definitions

  • the invention pertains to the general field of brake lights as used on vehicles such as automobiles and trucks and more particularly to such brake lights that flash intermittently during a sudden or panic stop.
  • the conventional brake light circuit which operates a pair of lights located at the rear of a vehicle has in many instances failed to produce adequate warning. This problem is especially prevalent on newer vehicles that have a large assemblage of lights on the rear panel of the vehicle.
  • turn signals which are normally located in the same light assembly with the tail lights and stoplight often add to the confusion as to whether brakes are being applied or a turn is to be made.
  • U.S. patent 5,059,947 issued to Ohen discloses a vehicle brake warning device for use in a vehicle with a brake pedal.
  • the device includes a detector for producing different electrical signals in response to the magnitude of the inertia force experienced during braking. Whenever a pressing force is exerted on the brake pedal, the detector experiences an inertia force whose magnitude depends upon the speed of the vehicle. The detector sends an appropriate signal dependent upon the magnitude of the inertia force to a control circuit which then activates a warning device which activates the brake lights.
  • U.S. patent 4,663,609 issued to Rosario discloses a brake light warning system for a motor vehicle which causes the brake lights to flash in a manner to attract the attention of a driver to the rear of the vehicle.
  • the system provides a warning of a slow down or stopping of the vehicle upon the application of the brakes.
  • the brake lights are first caused to flash rapidly for 2 or 3 times for a first interval of time followed by prolonged "on” periods interrupted periodically by a short "off” period followed by a short “on” period followed by a short “off” period for a second interval of time as long as pressure is applied to the brake pedal of the vehicle.
  • U.S. patent 3,593,278 issued to Bower discloses a vehicle brake light system wherein a flashing signal of variable frequency indicates the rate of deceleration of a vehicle.
  • the system includes a series of inertia switches and resistors forming a decelerometer, a multivibrator and a transistorized gate circuit which flashes the brake lights at a frequency proportional to the detected rate of deceleration.
  • U.-S. patent 3,528,056 issued to Voevodsky discloses a device for measuring the deceleration of a leading vehicle.
  • the device uses an accelerometer formed by mercury switches tilted at different angles with respect to a horizontal. They are progressively closed as the deceleration increases.
  • deceleration is measured by brake pressure and in still another form a tachometer device is coupled to a rotating part of the automobile.
  • the warning light, mounted on the leading car, is flashed at a rate which varies exponentially with a component of deceleration.
  • the sudden-stop brake-light warning system provides a driver in a vehicle following another vehicle with a positive warning signal that the front vehicle is about to make a sudden stop.
  • the warning is provided by the brake lights that have been modified by the system to intermittently flash when such a "panic" stop is about to be made.
  • the system employs a flashing brake light circuit that does not interfere with the existing vehicle brake-light circuit.
  • the inventive circuit becomes operational only if the driver suddenly depresses the brake pedal to make a sudden or panic stop. In this occurrence, the brake lights begin to flash intermittently to provide a positive and explicit warning.
  • the flashing brake-light circuit consists of four major elements: a multivibrator that sets the pulse rate of the blinking lights; a silicon controlled rectifier (SCR) circuit that maintains the multivibrator in a disabled condition during normal breaking and that enables the multivibrator when a panic stop occurs.
  • the SCR has its gate connected to an inertia operative switching circuit that employs a mercury switch.
  • the other conductive side of the mercury switch is connected to the vehicle battery via the brake pedal activated brake switch.
  • the mercury switch is located in a sloping attitude so that both inertia and gravity can be utilized to control the sensitivity of the switch.
  • the output of the multivibrator is applied to a relay drive transistor located in a relay drive/relay circuit, that drives a single-pole double-throw relay.
  • the brake switch When the multivibrator is disabled and the brake switch is normally depressed, the power from the vehicle battery is applied through the normally closed contact of the relay onto at least one of the brake lights.
  • the relay driver transistor pulses the coil of the relay causing the normally closed contacts pulsate in accordance with the time constant of the enabled multivibrator.
  • the brake lights are caused to flash ON and OFF to provide the panic stop warning.
  • o utilizes the existing brake light circuit of a vehicle and that can add additional lights, connected in parallel, to the front or side of the vehicle,
  • o is relatively simple in design and is substantially easy to install in any type of vehicle including automobiles, trucks, buses and motorcycles,
  • FIGURE 1 is a block diagram of the sudden-stop brake-light warning system attached to the existing vehicle brake-light circuit.
  • FIGURE 2 is a schematic diagram of the sudden-stop brake-light warning system attached to the existing vehicle brake-light circuit.
  • FIGURE 3 is a side elevational view of a mercury switch that is set to the required slope angle by means of its electrical leads.
  • FIGURE 4 is a side elevational view of a housing into which is inserted a mercury switch and which has a tab that allows the housing to be fastened to a structure of the required slope angle.
  • the best mode for carrying out the sudden-stop brake-light warning system 10 is presented in terms of a preferred embodiment that is designed to provide a trailing driver with a visual warning that the vehicle in front is in the process of making a sudden stop.
  • FIGURES 1 through 4 The preferred embodiment as shown in FIGURES 1 through 4 is comprised of the following major elements: a flashing brake-light circuit 12 that further consists of a multivibrator circuit 14, an inertia operative switching circuit 16, a silicon controlled rectifier circuit 18 and a relay drive/relay circuit 20.
  • the circuit 12 operates in combination with an existing vehicle brake-light circuit 50 consisting of a power source typically a vehicle battery 52, a brake pedal operated brake switch 54 connected between the power source and at least one brake light 56.
  • the system 10 is design to function in two operational modes: a normal brake-light mode and a flashing brake-light mode,
  • the normal mode uses the existing brake-light circuit 50 that bypasses the flashing brake-light circuit 12.
  • the current path as shown in FIGURE 2 is from the vehicle battery 52 through the brake pedal operated brake switch 54 through the pole 20B and normally closed contact 20C of a relay K1 that is located in the relay drive/relay circuit 20. From the relay contact 20C, the current is applied directly to constantly illuminate at least one brake light 56.
  • the flashing brake-light mode becomes operational only when the brake pedal is suddenly depressed such as in a "panic" stop.
  • the flashing brake light circuit 12 is automatically connected into the circuit path of the brake lights 54 as shown in block form in FIGURE 1 and schematically in FIGURE 2. Each element of the circuit- 12 is next described with reference to FIGURES 1 and 2.
  • the multivibrator circuit 14 is configured as a flip-flop type consisting of a pair of cross connected
  • NPN transistors Q1 and Q2 preferably of the 2N2222 type, when the circuit is enabled by a silicon controlled rectifier CR1 located in the silicon controlled rectifier circuit 18 described infra, the transistors continuously switch alternatively from a conducting state to a nonconducting state to generate a pulse output that is applied through output resistor R5 to the relay drive/relay circuit 20 also described infra.
  • the collectors of transistors Q1 and Q2 as shown in FIGURE 2, are connected to resistor-capacitor networks 14A and 14B.
  • the time constants of these networks are identical and are determined by capacitor 01 and resistor R3, and capacitor C2 and resistor R4 respectively.
  • the two resistor-capacitor networks 14A,14B alternatively charge and discharge at a frequency determined by the time constant of the networks. This frequency can be selectively set to range between two Hertz and 3 Hertz.
  • the enabling and disabling of the multivibrator circuit 14 is provided by the silicon controlled rectifier circuit 18.
  • the circuit 18 includes a 2N5061 silicon controlled rectifier (SCR) CR1 which requires very little current to be turned on.
  • the SCR has its gate 18A connected through resistor R6 to the second contact B of an inertia activated switch S1 located in the inertia operative switching circuit 16, and its anode connected to the emitter of transistor Q1 and G2 in the multivibrator circuit 14.
  • the gate 18A of CR1 is OFF and the ground/bypass circuit connected to the cathode of CR1 keeps the multivibrator disabled by maintaining the emitters of Q1 and Q2 grounded.
  • the switch S1 which in the preferred embodiment consists of a mercury switch as shown in FIGURES 2 and 3, has a first contact A and a second contact B.
  • the first contact A is connected to the positive terminal of the vehicle battery 52 through the brake switch 54.
  • the mercury switch S1 With the mercury switch S1 closed, the positive voltage from the battery 52 is applied through resistor R6 to the gate 18A of the SCR CR1. upon the application of this positive voltage, the gate opens, the SCR is turned ON and the multivibrator circuit is enabled.
  • the output of the enabled multivibrator circuit is applied through resistor R5 to the base of a relay driver 2N2222 NPN transistor Q3 located in the relay drive/relay circuit 20.
  • the emitter of transistor Q3 is in a common connection with the emitters of transistors Q1, Q2 in the multivibrator and the Q3 collector is connected, directly to one side of the coil 20A of relay K1.
  • the other side of the relay coil is connected to the relay's pole 20B which is also in line with the normal brake-light circuit 50.
  • the relay is caused to oscillate in synchronization with the time constant provided by the multivibrator allowing the lights 56 to rapidly flash ON and OFF during the time period that the multivibrator is enabled.
  • the sensitivity of the flashing brake-light circuit 12 is primarily dependent on the energizing speed of the mercury switch 51.
  • this switch S1 is attached to the inertia-operative switching circuit 16 with a means for allowing the switch to be placed in a selective slope ⁇ with respect to the vehicle's horizontal plane. Through testing, it was determined that the slope best suited for this application is between 25 and 30 degrees with the switch's conductive base end 16A located higher than its front end 16B. With this configuration, the relationship between inertia and gravity is utilized to close the electrical leads in the conductive end at an optimum time.
  • TWO mercury switch attachment schemes can be utilized to set the required switch slope ⁇ .
  • the preferred method is to bend the electrical leads 160 as shown in FIGURE 3 and then move the switch to the selected slope.
  • a housing 16D may be employed into which is inserted the switch 51 with its electrical leads extending from the back of the housing.
  • an outwardly extending side tab 16E is attached, by means of a fastener 16F, to a structural member on the vehicle near the system 10.
  • the system primarily is designed to operate with the conventional rear brake lights of a vehicle. However, the system may also be operated with a second set of at least one brake light 58 connected in parallel with at least one brake light 56 as shown in FIGURE 1.
  • This second set of lights may be add-ons attached to the front of the vehicle or they may be comprised of the vehicle's front and left turning lights, in either case, the additional set of blinking light adds another degree of safety to the vehicle.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Signal Processing (AREA)
  • Stored Programmes (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)

Abstract

Système de feux de détresse (10) dans lequel les feux stop (56) d'un véhicule se mettent automatiquement à clignoter de manière intermittente lorsque la pédale de frein et enfoncée soudainement comme dans le cas d'un arrêt brusque et imprévu. Le clignotement des feux (56) est produit par un circuit de clignotement (12) des feux de stop qui n'est mis en ÷uvre que lorsqu'il se produit un arrêt brusque. Ledit circuit (12) comprend un interrupteur à mercure (51) qui est siuté dans un circuit de commutation inertiel (16), et qui ne se ferme que lorsque l'interrupteur de frein (54) est enfoncé brusquement. Lorsque l'interrupteur (54) se ferme, l'alimentation provenant de la batterie du véhicule (52) s'applique sur la porte d'un redresseur commandé au silicium (CR1) situé dans le circuit (18) du redresseur commandé au silicium. L'excitation du CR1 commande un circuit (14) de multivibrateur connecté par l'intermédiaire d'un transistor commandé par relais (Q3) à une bobine (20A) d'un relais (K1) situé dans un circuit (20) de relais/commande par relais. Le relais émet des impulsions en fonction de la constante de temps du multivibrateur et tant que la bobine (20A) émet des impulsions les feux stop (56) clignotent.
PCT/US1992/003457 1991-04-12 1992-04-27 Systeme de feux de detresse utilisant les feux stop en cas d'arret d'urgence WO1992019467A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US08/107,855 US5404130A (en) 1991-04-12 1992-04-27 Sudden-stop brake-light warning system

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1019910005885A KR940000453B1 (ko) 1991-04-12 1991-04-12 전전자 교환기의 하위레벨 프로세서 로딩방법
KR5885 1991-04-27

Publications (2)

Publication Number Publication Date
WO1992019467A2 true WO1992019467A2 (fr) 1992-11-12
WO1992019467A3 WO1992019467A3 (fr) 1993-01-07

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1992/003457 WO1992019467A2 (fr) 1991-04-12 1992-04-27 Systeme de feux de detresse utilisant les feux stop en cas d'arret d'urgence

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KR (1) KR940000453B1 (fr)
WO (1) WO1992019467A2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1753002A2 (fr) * 2005-08-10 2007-02-14 Fredi Alexander Pommer Interrupteur électrique

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100228297B1 (ko) * 1996-05-10 1999-11-01 윤종용 디지탈 셀룰라시스템의 기지국에서 로딩에러 검출방법

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3593278A (en) * 1968-05-29 1971-07-13 Frank D Bower Vehicle brake light system
US3760353A (en) * 1971-10-18 1973-09-18 Dv Displays Corp Emergency vehicular warning system
US3846749A (en) * 1973-02-01 1974-11-05 Massachusetts Inst Technology Vehicle brake light control system
US4663609A (en) * 1985-10-21 1987-05-05 Rosario George M Brake alert device
US4843368A (en) * 1987-04-10 1989-06-27 Poulos Vincent M Enhanced deceleration condition disclosing device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1753002A2 (fr) * 2005-08-10 2007-02-14 Fredi Alexander Pommer Interrupteur électrique

Also Published As

Publication number Publication date
WO1992019467A3 (fr) 1993-01-07
KR920020901A (ko) 1992-11-21
KR940000453B1 (ko) 1994-01-21

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