JPS57175269A - Detector for number of persons - Google Patents

Detector for number of persons

Info

Publication number
JPS57175269A
JPS57175269A JP56060809A JP6080981A JPS57175269A JP S57175269 A JPS57175269 A JP S57175269A JP 56060809 A JP56060809 A JP 56060809A JP 6080981 A JP6080981 A JP 6080981A JP S57175269 A JPS57175269 A JP S57175269A
Authority
JP
Japan
Prior art keywords
persons
detected
detecting range
entrance
case
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
JP56060809A
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 JP56060809A priority Critical patent/JPS57175269A/en
Publication of JPS57175269A publication Critical patent/JPS57175269A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
    • G07C3/00—Registering or indicating the condition or the working of machines or other apparatus, other than vehicles
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
    • G07C9/00—Individual registration on entry or exit

Abstract

PURPOSE:To increase the life of the titled device with reduction of power consumption, by looking at only the entrance/exit part of the detecting range in case no persons is detected and then looking at again the entire detecting range in case some persons are detected. CONSTITUTION:A detecting circuit 4 for change of wave transmission/reception state limits the transmitting/receiving direction of the energy wave at the entrance/exit part of a detecting range by a command given from a central arithmetic device 2c. In case the number of detected persons is 0, only the area of the entrance/exit part 5 is defined as a limited detecting range 6 by the circuit 4. After this, it is impossible to detect a normal number of persons. However, the operation of the circuit is released after some person is once detected at the part 5. Then the energy wave is transmitted and received again over the entire detecting range. As a result, the trnsmission/reception is avoided for the undesired energy wave to the area where no person is detected. Thus the life of a detector for the number of persons can be increased with a reduction of power consumption.
JP56060809A 1981-04-22 1981-04-22 Detector for number of persons Pending JPS57175269A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56060809A JPS57175269A (en) 1981-04-22 1981-04-22 Detector for number of persons

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56060809A JPS57175269A (en) 1981-04-22 1981-04-22 Detector for number of persons

Publications (1)

Publication Number Publication Date
JPS57175269A true JPS57175269A (en) 1982-10-28

Family

ID=13153037

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56060809A Pending JPS57175269A (en) 1981-04-22 1981-04-22 Detector for number of persons

Country Status (1)

Country Link
JP (1) JPS57175269A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6435292A (en) * 1987-02-17 1989-02-06 Kone Elevator Gmbh Selection of operation mode of means used for counting object

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6435292A (en) * 1987-02-17 1989-02-06 Kone Elevator Gmbh Selection of operation mode of means used for counting object

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