RU7533U1 - SECURITY AND FIRE ALARM DEVICE - Google Patents

Abstract

A fire and security alarm device, consisting of a rectifier bridge connected to the telephone line, a central processor with program memory and a clock generator, a key that interrupts the signal from the telephone line to the telephone terminal equipment under the action of a central processor signal, a key connected to the bridge and performing pulse dialing of a telephone number under the action of a signal from a central processor, a shaper of a tone signal connected to a rectifier bridge and operating under the control of a central processor, a comparator connected to a rectifier bridge and a central processor, a sensor interface circuit connected to a sensor system and a central processor, a trigger also receiving a signal from a sensor interface circuit connected to a central processor, and power supply from a telephone line connected to the rectifier bridge and receiving control signals from both the trigger and the central processor, based on Even messages in the mode of frequency dialing by telephone line with preliminary pulse dialing of the message recipient, characterized in that in the initial state it receives power from part of the leakage current of the telephone line, and in the process of transmitting the message receives power from the central battery of the telephone exchange, it turns off the time of transmission of the message is the terminal telephone equipment, and also transmits messages not only about the operation of sensors in the alarm loops, but also about the facts of its switching on and off

Description

 Fire alarm and security devices Author: Yury Savin Class: G) 8B25 / IO

Utility Model Description

 Security and articulating device

Author: Savin Yuri Ivanovich Class: G08B25 / 10

The utility model relates to security and fire alarm devices and can be used for the protection of various objects equipped with telephone lines both urban and corporate. Such objects may include, for example, apartments, shops, offices, etc. of all forms of ownership.

A large number of models of security and fire alarms are known, in which information about an event that occurred at the security facility is encoded and transmitted to the recipient of this information (for example, the fire department) using a telephone line. Unfortunately, such models have a number of significant drawbacks, the main of which include:

-the need for constant occupation of the telephone line for signal transmission, which does not allow organizing an arbitrary number of objects of protection due to the fact that the design load of the PBX equipment is violated and an obstacle is created for the normal operation of the automatic subscriber equipment of the telephone network (caller ID, faxes, answering machines).

-the presence of a network power source, which automatically entails the organization of guaranteed power systems and creates an additional source of increased fire hazard.

-weak protection against damage and destruction due to large dimensions and characteristic signs of functioning.

The closest in technical essence to the proposed model is a security and fire alarm device type DC - 510 manufactured by BETATRON (Canada). The device consists of a power source, a solver and a communicator. The sensors of the security and fire alarm loops are connected to the cutting device.

When a sensor of any of the loops is triggered, the solver determines the type and number of the triggered sensor and instructs the communicator to dial the security unit number, after which it transmits information about the event at the security object with special tone signals. The disadvantages of this device are the presence of a mains power supply, poor mass

- overall indicators and high cost. In addition, during operation, this device creates pulsed interference with parallel connected telephone sets, due to which telephone sets with calling devices emit sounds that unmask the operation of the security and fire alarm device,

The development of the proposed utility model is aimed at implementing a device that is free from the above disadvantages and has a low cost, a high degree of protection against damage and destruction, complete fire and electrical safety during operation.

 Usgroysgao fire and security alarm system Author: Yury Savin Treasure: GQ8B25 / 10

by dialing the number of the recipient of the message, characterized in that it does not have a network power supply, disconnects the terminal telephone equipment during the transmission of the message, and also transmits messages not only about the sensors being triggered in the alarm loops, but also about the facts of its switching on and off. A device, characterized in that it analyzes the state of the telephone line and repeats the message transmission cycle until it is received by the addressee.

The device consists (see Fig. 1) of a rectifier bridge (M), a power supply from a telephone line (IP), electronic keys (K1, K2), a tone shaper (Ф), a clock generator (G), a central processor ( CPU), comparator (ILC), program memory (PP), trigger (TR), interface circuit with sensors (SS).

The device is connected to a telephone line (terminals L1 and L2), terminal telephone equipment - a telephone, fax, etc. (terminals TF1 and TF2), the sensor system (terminals D1 ... YES) and the switch (terminal OFF).

In the initial state (no alarm event - D1 ... DM sensor loops are closed, the switch is OFF in the OFF position), the K1 key is closed, the K2 key is open, power is supplied to the generator (G), central processing unit (CPU), comparator (CMP), former tone signal (Ф) and program memory (PP) is not supplied. The central processor is in the STOP state. The interface circuit (SS) and the trigger (TP) are supplied from the power supply (IP) by part of the telephone line leakage current through the bridge (M), which brings the polarity of the central exchange of the telephone exchange to a single value, regardless of the connection of terminals L1 and L2. The terminal telephone equipment functions normally through the K1 private key. The trigger is in RESET state.

Since the switch is in the OFF position, the operation of any of the sensors or several of them at the same time does not translate the trigger from the RESET state to the INSTALLED state due to the operation of the interface circuit logic (CC). The reaction to the sensors is only possible in the ON position of the switch.

When the switch is set to the ON position, the interface circuit will reset the trigger to the INSTALLED state. In this state, the trigger gives a command to a power source (IP) for connecting to the telephone line circuits that supply power to the central processor (CPU) with a generator (G) and program memory (PP), a tone shaper (F), a comparator (CMP), and a capacitor large capacity in the power supply (IP).

The central processor starts executing commands from the program memory, as a result of which the K1 key is opened to disconnect the terminal telephone equipment from the telephone line connected to the TF1 and TF2 terminals, the state of the interface circuit (SS) is read to determine the type of event, the trigger TR is set to RESET and control of the power source passes entirely to the central processor. Protection against false triggering of sensors (D1 ... DC) and a switch (OFF) or skipping of the operation signals is implemented by software.

 Security and fire alarm device Author: Yuri Savin Savin Class: GO $ B25 / 10

The next step is to check the status of the telephone line using the comparator. If the line is in the BUSY state, the central processor breaks the power supply circuit from the telephone line through the IP power supply and closes it again after a while, sufficient to reset the line status by the PBX equipment. When the telephone line is opened, the device receives power from a capacitor with a large capacity power source. If the telephone line is in the FREE state, using the K2 key and the IP power supply, the recipient dials the information in a pulsed mode.

Then, the line status is analyzed again and if the subscriber is busy, a new pulse dialing cycle is performed.

In case of successful dialing of the subscriber’s number, a message in the frequency dialing mode, also known as Dialing in the DTMF standard, is transmitted to the recipient of the information via the telephone line using the tone shaper Ф. The message may contain information about the unique number of the security and fire alarm device and the type of event - the operation of any of the sensors or the change in the state of the switch.

The cycle of transmitting a message to the recipient of information can be repeated several times to guarantee receipt of the message and its correct interpretation,

Having finished the message transmission cycle, the central processor opens the power supply circuit from the telephone line in the power supply unit of the IP, disconnecting the security and fire alarm device from the telephone line and generating a hang-up signal for the telephone exchange. Next, the central processor closes the key K1 for connecting to the telephone line of the terminal telephone equipment and turns off the power of the comparator, generator, program memory and its own nodes, putting itself in STOP mode. The fire alarm device is again in the standby mode of the event (initial mode). Under the supply voltage, the telephone line leakage current contains the TR trigger and the SS interface circuit.

The operation of the fire alarm system is demonstrated by the example of a change in the state of a circuit breaker. Similar processes occur when any of the loop sensors is triggered.

Protection against repeated transmission of a message about one event is carried out programmatically by the algorithms contained in the program memory.

Modern element base allows most of the nodes and parts of the device depicted in Fig. 1 to be implemented as a single-crystal micro-computer with low energy consumption.

Compared with the known and fire alarm devices, the described security and fire alarm device has largely eliminated the drawbacks described above - namely:

-the device does not have a mains power supply, which ensures complete fire safety,

- the device during the transmission of the message disables the terminal telephone equipment, thereby masking its work,

 Security and fire alarm device Author: Savin Yuri Ivanovich Class: G08B25 / 10

- the device does not interfere with the operation of the terminal telephone equipment and can be implemented in accordance with applicable standards for telephone network equipment,

- the device does not consume current (except for the leakage current of the telephone line) in the initial mode from the central battery of the telephone exchange and does not lead to its overload. Thus, an arbitrary number of security objects in terms of one automatic telephone exchange can be organized.

-the device has great flexibility in the context of organizing security measures - a message can be transmitted both according to the scheme of one information recipient - several devices, and according to the scheme - one device - several message recipients.

Due to the development of the modern element base, the fire alarm system can be easily implemented in practice and, if necessary, put into serial production.

Author: s / / Savin Yuri Ivanovich

Claims (3)

A fire and security alarm device, consisting of a rectifier bridge connected to the telephone line, a central processor with program memory and a clock generator, a key that interrupts the signal from the telephone line to the telephone terminal equipment under the action of a central processor signal, a key connected to the bridge and performing pulse dialing of a telephone number under the action of a signal from a central processor, a shaper of a tone signal connected to a rectifier bridge and operating under the control of a central processor, a comparator connected to a rectifier bridge and a central processor, a sensor interface circuit connected to a sensor system and a central processor, a trigger also receiving a signal from a sensor interface circuit connected to a central processor, and power supply from a telephone line connected to the rectifier bridge and receiving control signals from both the trigger and the central processor, based on Even messages in the mode of frequency dialing by telephone line with preliminary pulse dialing of the message recipient, characterized in that in the initial state it receives power from part of the leakage current of the telephone line, and in the process of transmitting the message receives power from the central battery of the telephone exchange, it turns off the time of transmission of the message is the terminal telephone equipment, and also transmits messages not only about the operation of sensors in the alarm loops, but also about the facts of its switching on and off tions.  2. The device according to claim 1, characterized in that in the initial state, power is supplied only to a part of the nodes of the device responsible for servicing the sensors. 3. The device according to claim 1, characterized in that it analyzes the state of the telephone line and repeats the message transmission cycle until it is received by the addressee.