JPS557641A - Automatic alarm unit of light ray type - Google Patents
Automatic alarm unit of light ray typeInfo
- Publication number
- JPS557641A JPS557641A JP8039878A JP8039878A JPS557641A JP S557641 A JPS557641 A JP S557641A JP 8039878 A JP8039878 A JP 8039878A JP 8039878 A JP8039878 A JP 8039878A JP S557641 A JPS557641 A JP S557641A
- Authority
- JP
- Japan
- Prior art keywords
- output
- circuit
- bits
- converter
- detection
- 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
Links
Landscapes
- Geophysics And Detection Of Objects (AREA)
- Optical Radar Systems And Details Thereof (AREA)
Abstract
PURPOSE: To increase the accuracy of the detection level and to enable to change the detection level, by detecting the modulated light reflected at the mobile object and by performing A/D conversion for it.
CONSTITUTION: The light modulated with the output of the oscillation circuit 1 is projected on the object 3 from the projection section 2 and it is reflected. This is received at the photo detection section 4, and it is amplified 5 and detected 6. This output is inputted to the A/D converter 8 constituted with a plurality of bits via the level adjusting section 7 to convert the signal into binary signal. The circuit 9 is so constituted that output 12 is made when any part of the circuit 9 has output via the OR circuit 10 by inputting the output of all the bits of the said converter 8 from the upper rank bit respectively. Thus, by using the converter 8 having more number of bits, the accuracy of detection can be increased and also, the detection level can be changed with the number of bits connected to the circuit 9.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8039878A JPS557641A (en) | 1978-06-30 | 1978-06-30 | Automatic alarm unit of light ray type |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8039878A JPS557641A (en) | 1978-06-30 | 1978-06-30 | Automatic alarm unit of light ray type |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS557641A true JPS557641A (en) | 1980-01-19 |
Family
ID=13717172
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP8039878A Pending JPS557641A (en) | 1978-06-30 | 1978-06-30 | Automatic alarm unit of light ray type |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS557641A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4598353A (en) * | 1984-11-07 | 1986-07-01 | Hughes Tool Company | Thyristor firing circuit for determining phase angle |
JPS61219883A (en) * | 1985-03-27 | 1986-09-30 | Nec Corp | Reflective type photoelectric sensor having plural detection levels |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4937319A (en) * | 1972-08-12 | 1974-04-06 |
-
1978
- 1978-06-30 JP JP8039878A patent/JPS557641A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4937319A (en) * | 1972-08-12 | 1974-04-06 |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4598353A (en) * | 1984-11-07 | 1986-07-01 | Hughes Tool Company | Thyristor firing circuit for determining phase angle |
JPS61219883A (en) * | 1985-03-27 | 1986-09-30 | Nec Corp | Reflective type photoelectric sensor having plural detection levels |
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