JPS576325A - Measuring device for intensity of illumination - Google Patents

Measuring device for intensity of illumination

Info

Publication number
JPS576325A
JPS576325A JP7977680A JP7977680A JPS576325A JP S576325 A JPS576325 A JP S576325A JP 7977680 A JP7977680 A JP 7977680A JP 7977680 A JP7977680 A JP 7977680A JP S576325 A JPS576325 A JP S576325A
Authority
JP
Japan
Prior art keywords
illumination
intensity
detection circuit
maximum value
photodetector
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.)
Granted
Application number
JP7977680A
Other languages
Japanese (ja)
Other versions
JPS6112209B2 (en
Inventor
Masayoshi Sakamoto
Yoshinori Tanabe
Junichi Hatayama
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP7977680A priority Critical patent/JPS576325A/en
Publication of JPS576325A publication Critical patent/JPS576325A/en
Publication of JPS6112209B2 publication Critical patent/JPS6112209B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J1/00—Photometry, e.g. photographic exposure meter
    • G01J1/42—Photometry, e.g. photographic exposure meter using electric radiation detectors

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)

Abstract

PURPOSE:To measure an intensity of illumination on a road within a measuring error with a device mounted on a car, by calculating the maximum value/minimum value of a vertical intensity of illumination for the measuring error of the horizontal intensity of illumination. CONSTITUTION:A horizontal intensity of illuminating is converted into an electric signal at a photodetector 10 and transmitted to an analog switch 12 via e.g., an amplifier 11. Further, a vertical intensity of illumination is converted into an electric signal at a photodetector 13 and this signal is transmitted to a maximum value detection circuit 15 and a minimum value detection circuit via e.g. an amplifier 14 to detect the maximum and minimum values, and these are divided at a division circuit 17 to obtain the ratio of maximum value/minimum value. Further, when this output is more than a given value, a comparator 18 is made at high level to turn the analog switch 12 to output the signal of a horizontal intensity of illumination. Further, the maximum value detection circuit 15 and the minimum value detection circuit 16 are cleared with pulses produced when the photodetector 10 passes beneath a lighting device with a detection circuit 19 of the location beneath lighting and a wave shape circuit 20.
JP7977680A 1980-06-12 1980-06-12 Measuring device for intensity of illumination Granted JPS576325A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7977680A JPS576325A (en) 1980-06-12 1980-06-12 Measuring device for intensity of illumination

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7977680A JPS576325A (en) 1980-06-12 1980-06-12 Measuring device for intensity of illumination

Publications (2)

Publication Number Publication Date
JPS576325A true JPS576325A (en) 1982-01-13
JPS6112209B2 JPS6112209B2 (en) 1986-04-07

Family

ID=13699599

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7977680A Granted JPS576325A (en) 1980-06-12 1980-06-12 Measuring device for intensity of illumination

Country Status (1)

Country Link
JP (1) JPS576325A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104390698A (en) * 2014-11-20 2015-03-04 厦门元谷信息科技有限公司 Preposed measuring device for dynamically testing road illumination on-site
JP2017026411A (en) * 2015-07-21 2017-02-02 株式会社トプコン Illuminance measurement system
JP2017219505A (en) * 2016-06-10 2017-12-14 東芝ライテック株式会社 Photometric system
JP2018084508A (en) * 2016-11-24 2018-05-31 東芝ライテック株式会社 Lighting environment measurement system and lighting system

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104390698A (en) * 2014-11-20 2015-03-04 厦门元谷信息科技有限公司 Preposed measuring device for dynamically testing road illumination on-site
JP2017026411A (en) * 2015-07-21 2017-02-02 株式会社トプコン Illuminance measurement system
JP2017219505A (en) * 2016-06-10 2017-12-14 東芝ライテック株式会社 Photometric system
JP2018084508A (en) * 2016-11-24 2018-05-31 東芝ライテック株式会社 Lighting environment measurement system and lighting system

Also Published As

Publication number Publication date
JPS6112209B2 (en) 1986-04-07

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