JPS5870396A - Alarm transmitter - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an alarm transmitting device, and more particularly to an alarm transmitting device that makes it possible to level line traffic.

Conventionally, this type of alarm transmitter has reported the status to a reception center at regular intervals after the start of security. Therefore, since alarm transmitters start guarding at almost the same time, there is a possibility that the telephone line at the receiving center may be temporarily congested and the status signals of some alarm transmitters cannot be received. There were drawbacks.

The purpose of the present invention is to eliminate these drawbacks, and to report the status to the reception center via the telephone line at every absolute time set in the scheduled transmission check section even if security request signals are temporarily concentrated. To provide an alarm transmitting device which can eliminate line traffic at a receiving center.

The alarm transmitting device of the present invention is an alarm transmitting device that transmits alarm information at regular intervals, and the alarm transmitting device that reports the status to a receiving center via a telephone line at regular intervals.
The system is characterized in that a notification is sent to a reception center via a telephone line at every preset absolute time after the start of security.

Next, explanation will be given with reference to the drawings.

A conventional alarm transmitting device 100 shown in FIG.
, a signal processing section 102 , a scheduled call timer section 103 , and an automatic dialing section 104 . The detection unit 101 converts the signal 7 of the sensor loop 110 into a logic level and outputs it to the signal processing unit 102 via the output value 2-a=5. The signal processing unit 102 discriminates the signal of the detection unit 101 from the security start signal that starts the operation of this processing unit, activates the automatic dialing unit 104, and generates a security start signal to the scheduled call timer unit 103. Outputs signal d.

Further, the scheduled transmission timer ill 03 outputs a scheduled signal e to the signal processing section 102 every two hours, for example, by the timer started by the start signal d. When the signal processing section 102 receives the regular signal e, the signal processing section 102 detects the detection section 101.
The automatic dialing unit 104 is activated by comparing the status signal with the status signal.

In this way, the conventional alarm transmitting device 100 sends a status signal to the reception center 106 via the subscriber telephone line C1 exchange 105 at regular intervals after the start of security. For that reason,
When security start signals are concentrated, the telephone line at the receiving center is temporarily congested, resulting in a disadvantage that status signals from some alarm transmitting devices cannot be received.

The present invention solves these drawbacks.

The present invention will be explained below using FIG.

In FIG. 2, an alarm transmitting device 2 according to an embodiment of the present invention
00 is composed of a detection section 101, a signal processing section 102, an automatic dial section 104, a clock section 201, and a scheduled call checking section 202. The detection unit 101 is a sensor loop 11
It is converted to an open/short logic level of 0 and output to the signal processing section 102 via the output signal ai. The signal processing unit 102 determines the signal from the Ail record detection unit 101 based on the security start signal that starts the operation of this processing unit, activates the automatic dialing unit 104, and also activates the automatic dialing unit 104.
Then, a gate signal j generated by a guard start signal is output. The clock section 201 is, for example, a highly accurate clock using a crystal, and always outputs a time signal f(i7).The scheduled transmission check section 202 always receives the time signal f2. When the absolute time set for each hour and the time signal f match and the gate signal j is input, the automatic dialing section 104 outputs the regular time signal e. The output signal is activated via the section 102.

In this way, this alarm transmitting device 200 transmits a status signal to the reception center 106 via the subscriber telephone line C1 exchange 105 at every absolute time set by the scheduled transmission checking section 202, for example, every two hours.

Even if the security start signals are concentrated in this way, if the absolute time is set in each alarm transmitter with a slight shift, the status signal will be sent to the receiving center at each absolute time.
The telephone line at the receiving center will not be congested and the situation where the status signals of some alarm transmitting devices cannot be received will no longer occur.

In FIG. 3, the scheduled transmission check section 202 in the embodiment of the present invention includes a start time setting section 300, a scheduled transmission interval setting section 301, an addition circuit section 302, and an OR gate 30.
3, selection section 304, latch circuit section 305, and AND 306
, a match detection section 307 , an AND gate 308 , and a monomulti 309 . The start time setting unit 300 sets the start time to 00:01, for example, and the start time data 300b is input to the selection unit 304 via the OR gate 3o3 in response to the set signal 300a. That is, the start time setting unit 300 sets the start time for each alarm transmitting device, for example, at 100:02.

By changing them in order such as "03:00",
You can shift the dial activation time.

The scheduled transmission interval setting unit 301 sets the periodic transmission interval to, for example, one hour or two hours. In other words, an output of 12 hours, assuming 02 o'clock OO minutes, is manually input to the adding circuit section 302. The adder circuit section 302 adds the time output from the latch circuit section 307 (to be described later) and the output of the scheduled transmission interval setting section 301, and outputs the result to the selection section 304. The off-path low output signal 302c, which is the output of the main adder circuit section 302, indicates that the addition result is "24 o'clock OO
When the overflow signal 302C is greater than or equal to 10 minutes, the overflow signal 302C is input to the OR gate 303 and the overflow negative output is input to the AND gate 306. The selection section 304 receives the selection signal 303h from the OR gate 303 and the AND gate 306.
, 306g, one of the start time data 300b and addition data 6-302d is selected and output to the latch circuit section 305. At the same time, the selection signal 303h.

A strobe pulse 304f made from 306g is output to the latch circuit section 305. The latch circuit section 305 transfers the data from the selection section 304 to the strobe pulse 304.
It is latched at the timing f and output to the coincidence detection section 307 and the addition circuit @302.

A coincidence detection section 307 detects coincidence between the output of the latch circuit section 305 and the time signal f, and outputs it to the coincidence 308, and an AND gate 308 gates it with a gate signal j, and outputs it to the signal processing section 102 as a fixed time signal e. Output to. The selection circuit section 304 selects the next data again and transfers it to the latch circuit section 30.
Latch it to 5.

In this way, the scheduled estrus check unit 202 of this embodiment checks the adding circuit 3 every two hours, for example, after the scheduled signal e is output.
It has a function of sequentially adding up signals at 02:02, resetting to 00:01 using overflow output signal 302C at 24:00 at night, and outputting every two hours.

Further, the function of the scheduled transmission checking section 202 of this embodiment is that by inputting the data of the start time and scheduled transmission interval in advance using a microcomputer, it can match the data of the time signal f and output the scheduled signal e. It is possible.

Even if the security start signals are concentrated in this way, if the absolute time is set at a slightly different time on each alarm transmitter, the status signal will be sent to the receiving center at each absolute time, so the telephone line at the receiving center will be congested. This eliminates the problem of not being able to receive status signals from some alarm transmitting devices. Moreover, the center device can centrally monitor a larger number of alarm transmitting devices than in the conventional system.

As explained above, by sending the status signal to the receiving center at every preset absolute time after the start of security, the telephone line of the receiving center is not congested and the status signal of the alarm transmitting device is reliably received. In addition, the receiving center can receive messages in numerical order, which is very effective in monitoring the center.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing a conventional example, FIG. 2 is a block diagram showing an embodiment according to the present invention, and FIG. 3 is a block diagram showing the scheduled call check section of FIG. 2. 100... Alarm transmitting device, 101...
Detection unit, 102...Signal processing unit, 103...
... Scheduled transmission tie loop, a ... Input signal,
b: Output signal, C: Subscriber telephone line, d: Start signal, e: Scheduled signal, 200: Alarm transmission Device, 201...
...Clock department, 202...Scheduled transmission check department,
f...Time signal, J...Gate signal,
300...Start time setting section, 301...
... Regular transmission interval setting section, 302 ... Addition circuit section, 303 ... OR gate, 304 ...
...Select section, 305...Latch circuit section, 3
06...and gate, 307...match detection unit, 308...and gate, 309...
...Mono multi, 300a...Set signal, 300b...Start time data % 302C...Overflow output signal,
302d...Additional data% 309e...
...Single sheet force signal, 304f...Strobe pulse, 306g...Selection signal, 303h...
...Selection signal. 10-

Claims (1)

[Claims] Regarding an alarm transmitting device that transmits alarm information at regular intervals, in an alarm transmitting device that reports the status to a receiving center via a telephone line at regular intervals, the telephone line is sent to the receiving center at preset absolute times after the start of security. An alarm transmitting device characterized in that it sends a report via.