GB1418106A - Door opening systems - Google Patents

Door opening systems

Info

Publication number
GB1418106A
GB1418106A GB1604673A GB1604673A GB1418106A GB 1418106 A GB1418106 A GB 1418106A GB 1604673 A GB1604673 A GB 1604673A GB 1604673 A GB1604673 A GB 1604673A GB 1418106 A GB1418106 A GB 1418106A
Authority
GB
United Kingdom
Prior art keywords
ultrasonic
transducer
control signal
circuit
neoprene
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
Application number
GB1604673A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Republic Industries Inc
Original Assignee
Republic Industries Inc
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 Republic Industries Inc filed Critical Republic Industries Inc
Priority to GB1604673A priority Critical patent/GB1418106A/en
Publication of GB1418106A publication Critical patent/GB1418106A/en
Expired legal-status Critical Current

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
    • G01S15/00—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
    • G01S15/02—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems using reflection of acoustic waves
    • G01S15/04—Systems determining presence of a target
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
    • B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
    • B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
    • B06B1/02—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy
    • B06B1/06—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction
    • B06B1/0644—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction using a single piezoelectric element
    • B06B1/0651—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction using a single piezoelectric element of circular shape
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
    • E05F15/00—Power-operated mechanisms for wings
    • E05F15/70—Power-operated mechanisms for wings with automatic actuation
    • E05F15/73—Power-operated mechanisms for wings with automatic actuation responsive to movement or presence of persons or objects
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
    • E05F15/00—Power-operated mechanisms for wings
    • E05F15/70—Power-operated mechanisms for wings with automatic actuation
    • E05F15/73—Power-operated mechanisms for wings with automatic actuation responsive to movement or presence of persons or objects
    • E05F2015/763—Power-operated mechanisms for wings with automatic actuation responsive to movement or presence of persons or objects using acoustical sensors

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Acoustics & Sound (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • General Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Power-Operated Mechanisms For Wings (AREA)
  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)

Abstract

1418106 Ultrasonic pulse-echo systems; piezoelectric transducers; acoustic horns REPUBLIC INDUSTRIES Inc 4 April 1973 16046/73 Headings H4D H4J and H4X [Also in Division G4] A system for automatically operating one or more doors comprises an ultrasonic transducer for transmitting and receiving ultrasonic waves and a source of low frequency pulses of ultrasonic energy coupled to the transducer, ultrasonic energy reflected by surfaces, for example persons, being detected by a circuit which comprises an amplifier, an automatic gain circuit controlled by an integrator, and means for discriminating against false returns; the detection circuit produces a control signal which opens or closes the door. The means for discriminating against unwanted signals may comprise a range gate circuit and a logic circuit arranged so that the control signal is produced only if the output signal exceeds a threshold signal on two out of three successive pulse cycles. Means may also be provided for producing a control signal only when the energy received by the detector exceeds a threshold noise level. The system may discriminate against false returns from the transducer casing, the floor, or rain drops. As shown in Fig. 3, a transducer assembly 32 is provided to act as transmitter and receiver. Ultrasonic radiation occurs at right angles to the faces 40a, 40b of a cylindrical lead zirconate ceramic element 40 which is wrapped with an inner layer of neoprene and an outer layer of cork and neoprene and is supported by a nylon clamp. Transducer assembly 32 is mounted in a reflector housing 22 which includes beam-directing inserts 30<SP>1</SP>, 31<SP>1</SP> adjustable at 33, 34.
GB1604673A 1973-04-04 1973-04-04 Door opening systems Expired GB1418106A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1604673A GB1418106A (en) 1973-04-04 1973-04-04 Door opening systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1604673A GB1418106A (en) 1973-04-04 1973-04-04 Door opening systems

Publications (1)

Publication Number Publication Date
GB1418106A true GB1418106A (en) 1975-12-17

Family

ID=10070160

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1604673A Expired GB1418106A (en) 1973-04-04 1973-04-04 Door opening systems

Country Status (1)

Country Link
GB (1) GB1418106A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4442515A (en) * 1981-12-17 1984-04-10 Ford Motor Company Multiplex transmission medium for application in multiplex vehicle control systems
GB2129988A (en) * 1982-10-02 1984-05-23 Smith & Nephew Ass Patient support means
GB2137749A (en) * 1983-04-07 1984-10-10 Healey Meters Limited Intruder Detection System
CN107132794A (en) * 2017-05-22 2017-09-05 张丽 Safety protecting method

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4442515A (en) * 1981-12-17 1984-04-10 Ford Motor Company Multiplex transmission medium for application in multiplex vehicle control systems
GB2129988A (en) * 1982-10-02 1984-05-23 Smith & Nephew Ass Patient support means
GB2137749A (en) * 1983-04-07 1984-10-10 Healey Meters Limited Intruder Detection System
CN107132794A (en) * 2017-05-22 2017-09-05 张丽 Safety protecting method
CN107132794B (en) * 2017-05-22 2019-08-20 诺亘(上海)工业自动化有限公司 Safety protecting method

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Legal Events

Date Code Title Description
CSNS Application of which complete specification have been accepted and published, but patent is not sealed