JPH0449757Y2 - - Google Patents

Description

[Detailed description of the invention] A. Field of industrial application This invention relates to a building patroller communication device that provides emergency communication instructions such as work instructions and business communications to building maintenance personnel patrolling inside high-rise buildings such as buildings. It is.

B. Conventional Overview This invention is a communication device that instructs maintenance personnel patrolling a building to make an emergency call, and connects a high-frequency signal modulated with a patroller call signal to the broadcasting equipment of the building's broadcasting equipment and a specific speaker. By installing a coupling capacitor between the line to which the specific speaker is connected and the line to which other speakers are connected, so that when the signal is supplied to the line, the signal flows to the line throughout the building. This system uses a portion of the building's public address equipment to transmit emergency communication instructions to maintenance personnel on patrol, and can be implemented without making major changes to existing equipment.

C. PRIOR ART Air conditioners and power supply devices are arranged in buildings such as buildings, and these devices and monitoring devices that monitor these devices are usually installed in basements. Since each of the equipment's accessories is located on each floor of the building, maintenance personnel for these equipment must travel not only to the basement but also to each floor of the building. If an abnormality occurs in the device during this patrol, it is necessary to immediately return to the monitoring device in the basement, but conventional methods have several problems as described below.

D. Problems that the invention aims to solve: While patrolling inside a building or other building, it was not possible to instruct building maintenance personnel to make an emergency call for the following reasons.

(1) Public address equipment within the building may not be used for communication by maintenance personnel.

(2) In a so-called building group management system that centrally manages a group of buildings, building maintenance personnel's main job is patrolling equipment, and monitoring duties are transmitted as alarm displays by the computer of the monitoring device. Therefore, when an alarm signal notifying an abnormality in the air conditioner or the like is generated, the alarm signal generation information cannot be transmitted to maintenance personnel on patrol.

(3) When an existing building is newly accommodated in a building group management system, the addition of an emergency communication device during patrols by building maintenance personnel poses an economic burden as well as technically difficult problems.

(4) In order to solve the problems mentioned in (1) to (3) above, in recent years, a high frequency signal containing an alarm signal is supplied to the line connecting the broadcasting equipment and the speaker of the broadcasting equipment to contact the patroller. Although something was developed,
Even in this case, there are the following problems.

In the case of broadcasting equipment in a building, for example, in addition to broadcasting on each floor of the building, there is also a function of simultaneously broadcasting on each floor. Among such broadcasting equipment, there are some in which the speaker line and the broadcasting equipment are always electrically separated via a switch. In such equipment, there is a problem in that even if a high frequency signal is supplied to a specific line, the signal cannot be transmitted to the lines on each floor because the lines are electrically separated.

E. Means for solving the problem This invention consists of a line connecting the output end of broadcasting equipment in a building and a plurality of speakers installed separately in the building, and a terminal inserted in the middle of this line. board and
A transmitter that transmits a high frequency signal modulated with a specific tone signal in response to an alarm signal generated in the monitoring unit of the building, and an electric line connecting the transmitter and a line connected to the specific speaker, A capacitor that guides the high frequency signal from the transmitter to the line,
a coupling capacitor disposed within the terminal board and connected between a line through which the high-frequency signal is guided and a line connected to a speaker other than a specific speaker, and allowing only the high-frequency signal to pass through; and a coupling capacitor that is radiated from the line. It consists of a receiver that receives a high frequency signal, demodulates it, detects the tone signal, and issues an alarm signal.

F. Effect In this invention configured as described above, a high frequency signal in which an alarm signal is modulated with a specific tone signal is placed on a line connected to a specific speaker and is sent to each floor in the building. However, if the lines for the speakers on each floor and the lines to which high-frequency signals are supplied are electrically separated from each other, it becomes impossible to send alarm signals to each floor. Normally, the lines that connect broadcast equipment and speakers in a building are concentrated at a terminal board. Therefore, by providing a coupling capacitor that allows only high-frequency signals to pass between each line in the terminal board, an alarm signal can be sent to the lines on each floor via the coupling capacitor.

G Embodiment FIG. 1A is a circuit configuration diagram showing an embodiment of this invention, in which 1 is a building broadcasting equipment, 2a, 2
b and 2c are speakers installed on the 1st, 2nd, and 3rd floors of the building. The output end of the broadcast equipment 1 is connected to a terminal board 4 via call switches 3a, 3b, 3c for each floor, and lines 5a, 5b, 5 are connected from this terminal board 4 to speakers 2a, 2b, 2c on each floor.
connected via c. Reference numerals 6a, 6b, and 6c are switches for calling each floor simultaneously connected in parallel to the switches 3a, 3b, and 3c for calling each floor. Since both switches 3a, 3b, 3c and 6a, 6b, 6c are normally in the off state, the lines 5a, 5b,
5c are electrically isolated from each other.

Reference numeral 7 denotes a transmitter that transmits a call signal for giving emergency contact instructions to people patrolling within the building (maintenance personnel), and the output signal of this transmitter 7 is connected to the speaker 2b on the 2nd floor via capacitors 8a and 8b. It is supplied to the line 5b. 9 is railroad track 5
This is a receiver that receives high frequency signals radiated from a, 5b, and 5c. 10 is a switch for operating the transmitter 7.

FIG. 1B is a configuration diagram showing the details inside the terminal board 4.
Inside this terminal board 4 are tracks 5 for each floor, 1F, 2F, and 3F.
Coupling capacitor 1 connected between a, 5b, 5c
1a, 11b to 14a, 14b are provided. These coupling capacitors 11a, 11b to 14a, 14
b has a function of allowing high frequency signals to pass through but not allowing low frequency signals for broadcasting to pass through.

Note that the coupling capacitors 11a, 11b to 14
If a failure occurs in which both a and 14b are short-circuited, the short-circuit detection function of the broadcasting equipment 1 can issue an alarm.

In the embodiment configured as described above, for example, a monitoring device (not shown) detects that an air conditioner or the like has failed and generates an alarm signal. If the switch 10 is set to be closed when this alarm signal is generated, the transmitter 7 will start operating when the switch 10 is closed. Further, an alarm signal is given to a tone encoder of an input circuit of the transmitter 7, which will be described later. The transmitter 7 receives an alarm signal.
A tone encoder generates a tone for the called receiver, modulates it into a high frequency signal, and supplies this signal to line 5b via capacitors 8a and 8b. The high frequency signal supplied to the line 5b is radiated into the room on the 2nd floor, and is also transmitted to the lines 5a and 5c on the other floors 1F and 3F via the coupling capacitors 11a, 11b to 14a, 14b in the terminal board 4,
It is radiated into the rooms on other floors, 1F and 3F. Therefore, even if maintenance personnel are patrolling inside the building, they can immediately recognize the alarm signal if they have the receiver 9 capable of receiving the high frequency signal.

FIG. 2 is a block diagram showing a specific configuration of the transmitter 7. Reference numeral 21 is a tone encoder, and an alarm signal, which is a calling signal, is supplied to the input of the tone encoder 21. This tone encoder 21 emits a specified tone and is intended to call only a receiver having a decoder for this frequency. The output of this tone encoder 21 is amplified by a low frequency (AF) amplifier 22 and converted into a crystal oscillation.
The signal is supplied to a circuit 23 that performs FM modulation. The crystal oscillation frequency connected to this circuit 23 is 6.13MHz. The output signal FM modulated by the circuit 23 is doubled by the multiplier amplifier 24 and input to the mixer 25. This mixer 25 is supplied with an output signal from a crystal oscillator 26 . If the oscillation frequency of the crystal oscillator is 12MHz here, the output of mixer 25 is
A 260KHz FM modulated signal is obtained. The output signal of this mixer 25 is input to an excitation amplifier 28 via a buffer amplifier 27. This excitation amplifier 28
After amplifying the signal to a predetermined value, the power amplifier 2
9 performs a predetermined power amplification. power amplifier 29
The output signal (inductive radio frequency) of capacitor 8
It is supplied to the line 5b via a and 8b.

FIG. 3 is a block diagram showing the specific configuration of the receiver 9, where 31 is an antenna, and the signal received by the antenna 31 is amplified by a radio frequency (RF) amplifier 32 and input to a first mixer 33. . The output signal of the first local oscillator 34 is input to the first mixer 33 . The oscillation frequency of the first local oscillator 34 is
10.440MHz, the output of the first mixer 33 is
A first intermediate frequency of 10.7MHz is obtained. The output signal of the first mixer 33 is input to the first intermediate frequency amplifier 36 via the crystal filter 35 . The signal amplified by this amplifier 36 is input to a second mixer 37. The second mixer 37 also has a second
The output signal of the local oscillator 38 is input. Here, the oscillation frequency of the second local oscillator 38 is set to 11.155M.
Hz, the second intermediate frequency of 455 KHz is obtained at the output of the second mixer 37. The obtained second intermediate frequency is amplified by a second intermediate frequency amplifier 40 with a limiter via a ceramic filter 39, and is supplied to a discriminator 41 which demodulates the FM signal. The demodulated signal is input to the squelch circuit 42, where the operating level range is set. The output signal of the squelch circuit 42 is input to a tone decoder 43 and only the specified receiver is outputted as a tone signal through the tone decoder. Thereafter, the tone signal is amplified by a low frequency amplifier 44 and input to a rectifier circuit 45. Then, the rectified output signal is DC amplified by a DC amplifier 46. The multivibrator 47 is operated with the DC amplified output signal, and the operation output signal is sent to the output circuit 4.
8 to an alarm transmitter 49. The alarm transmitter 49 is operated by the output signal of the force circuit 48 and causes the transmitter to vibrate intermittently using a multivibrator.

As an input circuit for operating the transmitter 7 described above, an output relay of an alarm circuit of a building management device, an output relay of an alarm circuit operated by a call signal from a higher management center, etc. can be used.

H. Effects of the invention As stated above, according to this invention, a calling signal is carried by inductive radio on a specific broadcasting line in a building, and a coupling capacitor installed in the terminal board is placed on other broadcasting lines. Since the calling signal is transmitted through the building, the calling signal is radiated to the entire building, and the building patroller can receive this radiated signal with a receiver, it is possible to reliably give emergency contact instructions to the patroller. Furthermore, with this invention, even in the case of equipment that is not normally used, such as emergency broadcasting equipment, a coupling capacitor is simply provided within the terminal board, making it possible to eliminate the need for extensive construction work.

[Brief explanation of the drawing]

Figures 1A and 1B show an embodiment of this invention. Figure 1A is a circuit diagram showing the overall configuration, and Figure 1B is a circuit diagram showing the overall configuration.
2 is a wiring diagram showing details of the inside of the terminal board, FIG. 2 is a block diagram of the transmitter, and FIG. 3 is a block diagram of the receiver. 1... Broadcast equipment, 2a, 2b, 2c... Speaker, 3a, 3b, 3c... Switch for calling each floor, 4... Terminal board, 5a, 5b, 5c... Track,
6a, 6b, 6c...Switch for simultaneous call on each floor,
7...Transmitter, 8a, 8b...Capacitor, 9...
...Receivers, 11a, 11b to 14a, 14b...
...coupling capacitor.

Claims (1)

[Scope of utility model registration request] A line that connects the output end of broadcasting equipment in a building and multiple speakers placed separately in the building, a terminal board inserted in the middle of this line, and an alarm generated in the monitoring section of the building. A transmitter that emits a high-frequency signal modulated with a specific tone signal is inserted into an electric line connecting the transmitter and a line connected to the specific speaker, and the high-frequency signal from the transmitter is connected to the line. a coupling capacitor disposed in the terminal board that allows only high-frequency signals to pass through, which is connected between a line on which the high-frequency signal is guided and a line connected to a speaker other than a specific speaker; receives a high frequency signal emitted from the device, demodulates it and detects the tone signal,
A building patrol communication device consisting of a receiver that transmits an alarm signal.