JPH02149497U - - Google Patents
Info
- Publication number
- JPH02149497U JPH02149497U JP5981689U JP5981689U JPH02149497U JP H02149497 U JPH02149497 U JP H02149497U JP 5981689 U JP5981689 U JP 5981689U JP 5981689 U JP5981689 U JP 5981689U JP H02149497 U JPH02149497 U JP H02149497U
- Authority
- JP
- Japan
- Prior art keywords
- comparison circuit
- receiver
- signal level
- radio wave
- received radio
- 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
- 238000010586 diagram Methods 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
Landscapes
- Emergency Alarm Devices (AREA)
- Burglar Alarm Systems (AREA)
Description
第１図は無線送信機のブロツク図、第２図は無
線受信機のブロツク図である。
１……発振回路、３，６……増幅回路、４，５
……アンテナ、９……比較回路、１０……リレー
回路、１２……ブザー。
FIG. 1 is a block diagram of a radio transmitter, and FIG. 2 is a block diagram of a radio receiver. 1...Oscillation circuit, 3, 6...Amplification circuit, 4, 5
...Antenna, 9...Comparison circuit, 10...Relay circuit, 12...Buzzer.
Claims (1)
上記受信機に受信電波の信号レベルと所定の基準
レベルとの比較回路を設け、受信電波の信号レベ
ルの方が小さくなつた場合に比較回路の出力によ
り発音体を鳴動させるスイツチング手段を設けて
成る警報装置。 Consists of a combination of a radio transmitter and a radio receiver,
The receiver is provided with a comparison circuit for comparing the signal level of the received radio wave with a predetermined reference level, and is provided with switching means for causing a sounding body to ring by the output of the comparison circuit when the signal level of the received radio wave becomes smaller. Alarm device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5981689U JPH02149497U (en) | 1989-05-24 | 1989-05-24 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5981689U JPH02149497U (en) | 1989-05-24 | 1989-05-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02149497U true JPH02149497U (en) | 1990-12-20 |
Family
ID=31586645
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5981689U Pending JPH02149497U (en) | 1989-05-24 | 1989-05-24 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02149497U (en) |
-
1989
- 1989-05-24 JP JP5981689U patent/JPH02149497U/ja active Pending