JPS57175270A - Controlling system for number of persons detector - Google Patents

Controlling system for number of persons detector

Info

Publication number
JPS57175270A
JPS57175270A JP56060810A JP6081081A JPS57175270A JP S57175270 A JPS57175270 A JP S57175270A JP 56060810 A JP56060810 A JP 56060810A JP 6081081 A JP6081081 A JP 6081081A JP S57175270 A JPS57175270 A JP S57175270A
Authority
JP
Japan
Prior art keywords
persons
receiver
detection
detectors
transmitter
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.)
Pending
Application number
JP56060810A
Other languages
Japanese (ja)
Inventor
Susumu Maeda
Kazuo Tokui
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP56060810A priority Critical patent/JPS57175270A/en
Publication of JPS57175270A publication Critical patent/JPS57175270A/en
Pending 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
    • 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
    • G01S13/87—Combinations of radar systems, e.g. primary radar and secondary radar

Landscapes

  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
  • Radar Systems Or Details Thereof (AREA)

Abstract

PURPOSE:To previously prevent the misdetection, by switching the working detectors among plural detectors for number of persons. CONSTITUTION:A wave transmitter/receiver 4 and an arithmetic device 5 for detection of number of persons correspond to a wave transmitter/receiver 1 and an arithmetic device 2 for detection of number of persons respectively. An operation switching device 6 is set between the device 2 and the device 5. The device 6 consists of an astable vibrator 6a which oscillates with a proper cycle and an inverter 6b. The devices 2 and 5 work alternately by the signal supplied from th device 6. Thus no process of detection and calculation is carried out for the signal which is received at one of the transmitters/receivers 1 and 4 in the period during which the energy wave is transmitted from the other transmitter/ receiver. Accordingly the energy waves transmitted from the detectors for number of persons distributed close the each other are received mutually. As a result, a mistake by which the presence of person is detected although no person exists within the detecting range can be previously prevented.
JP56060810A 1981-04-22 1981-04-22 Controlling system for number of persons detector Pending JPS57175270A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56060810A JPS57175270A (en) 1981-04-22 1981-04-22 Controlling system for number of persons detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56060810A JPS57175270A (en) 1981-04-22 1981-04-22 Controlling system for number of persons detector

Publications (1)

Publication Number Publication Date
JPS57175270A true JPS57175270A (en) 1982-10-28

Family

ID=13153069

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56060810A Pending JPS57175270A (en) 1981-04-22 1981-04-22 Controlling system for number of persons detector

Country Status (1)

Country Link
JP (1) JPS57175270A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51113680A (en) * 1975-03-28 1976-10-06 Hitachi Ltd Number detecting apparatus

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51113680A (en) * 1975-03-28 1976-10-06 Hitachi Ltd Number detecting apparatus

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