JPS5971599A - Method and apparatus for automatically detecting measured values and/or tag of alarm - 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 a method and a device for automatically detecting alarm measurements and/or alarm markings in a notification device, for example a danger notification device. In this case, the danger notification device has a notification center and at least one notification line, to which a plurality of alarms are connected in a chain.

In each annunciator, during periodic detection, a timing element, which is controlled by the measurement value of the annunciator via a measurement value converter, starts operating at the time characterizing the annunciator address. In this case, during the running time of the associated timing element, a control command for a given alarm is generated on the signaling line and is supplied by the alarm in question.

Danger notification devices are often equipped with various alarms. For example, a smoke alarm, a heat alarm, a flame alarm, a pushbutton alarm, etc. are connected to the fire alarm device.

The physical characteristics measured in the event of a fire are evaluated in the alarm system according to a suitable algorithm. Normally, only standardized digital signals are transmitted to reporting centers.

In this case, different characteristic quantities may be evaluated in the annunciator according to different algorithms. Other reporting devices are also known. In this device, the fire characteristics are not evaluated in the alarm, but are sent in analog form to the notification center using a suitable transmission method. In the notification center, an evaluation device (preferably a microcomputer) processes the measured values of all the notification devices. This type of reporting device is also used for intrusion prevention.

Such a notification device is described, for example, in German Patent No. 2,533,330. With this device, when all the alarms connected to one line are detected after their specific delay time, the alarms must have a current ξlux proportional to the measured value. Detected by duration. At this time, the evaluation device of the notification center detects the 712 response of each alarm by measuring the delay time, and detects the analog measurement value of the alarm by measuring the ξ pulse width.

Federal Republic of Italy Patent No. 2533382 specifies:
A method for this type of reporting device is described. According to this method, at the beginning of each detection cycle, all annunciators are electrically isolated from the reporting line. The separated annunciators are then connected in a predetermined sequence such that each annunciator additionally connects the following annunciator to the line voltage after a delay time corresponding to its measured value has elapsed. At this time, the evaluation device in the notification center previously detects each alarm address from the number of times the line current has increased, and detects the measured value from the length of the corresponding time delay. In order to identify and retrieve fault or warning information, the analogue alarm measurement signals are combined and processed.

However, it is not always possible or meaningful to evaluate and process the measurements of various alarm devices in a uniform manner. For example, in automatic smoke alarms, integral characteristics are more suitable for blocking short-term disturbances. in this case,
A warning is issued only when the signal lasts for a predetermined amount of time. On the other hand, with a manual alarm, it is necessary to issue a notification immediately after the press-button alarm is operated.

Further, when the alarm is activated for the purpose of inspection, for example, there is no need to issue an alarm. The alarm only needs to send a response to the reporting center. In this case, it is necessary to be able to identify the types or different operating states of the various alarms and communicate the results to the notification center.

In the above-mentioned notification devices, a notification indicator, that is, a signal indicating the type and status of the notification device, is generally manually input into the notification center for the notification device in question. For each alarm in the reporting device, their unique indicators (type of alarm, alarm being tested, alarms not connected, etc.) are stored in the center. The input of such alarm indicators is generally carried out manually and correspondingly stored via switches or keyboards. In this case, the input data must correspond exactly to the actual state of the device. However, Since the notification device cannot reliably detect errors that occur during input or errors that occur when replacing the alarm, serious consequences may occur when issuing an alarm.

BACKGROUND OF THE INVENTION A device for transmitting control commands in a fire protection device is known from German Patent No. 2,533,354. In the device described in this specification, each annunciator has a timing element. Timing elements are used to transmit control commands on the notification line to the individual annunciators. In that case, the alarm can be received only during the delay time of the timer. In addition, by the control device installed in the alarm,
Only one timing element can be connected to the reporting line during a control cycle. At this time, the starting point of each timer element ℃ is
It is evaluated as the address of the control element belonging to the timed element in the notification center.

OBJECTS OF THE INVENTION It is an object of the invention to provide a method and a device for automatically detecting alarm indicators and/or alarm measurements, in order to avoid manual entry of alarm indicators into a reporting center. In this case, known control command transmission methods must be used to automatically detect the alarm-specific indicators and, if necessary, to be able to evaluate the alarm measurements in the notification center.

Structure and Effects of the Invention According to the present invention, this problem is solved by a structure having the features set forth in claim 1. In this case, the switching devices in the individual alarms are controlled by control commands transmitted from the alarm center to the alarms. The switching device switches the transmission of the alarm measurement value to the transmission of the alarm indicator, or changes the alarm measurement value by a predetermined value. A device is provided in each alarm device by means of which an indicator of the alarm, which indicates, for example, the type and status of the alarm within the alarm device, is set and adjusted. The timing elements in the annunciator can be set and adjusted to a characteristic value for each annunciator, or to a variable value, depending on the indicator on the annunciator. Each annunciator indicator is transmitted to a notification center during subsequent detection cycles where it is stored and processed.

According to the method of the invention, control commands are evaluated in the annunciator as switching commands. The connection of the timing element is thereby switched from the measuring transducer to the indicator transmitter. The beacon transmitter sets and adjusts the timing element to a characteristic time. This time is
For example, it corresponds to a sign indicating the type and status of the alarm.

Depending on the type of alarm, the corresponding alarm indicator is set. In the next detection cycle, the running time of the timing element is
For the alarm in question, an indicator is evaluated, for example the type of alarm.

According to the method of the invention, it is also possible to transmit control commands from the annunciator center to the individual annunciators. This annunciator control is used to cause the annunciator to transmit its indicator. Therefore, the alarm that should detect the sign is controlled first.

Within each annunciator, a switching command may cause a predetermined change to be made to the annunciator measurements instead of switching to the annunciator indicator. Based on the criteria for this change (e.g., decreasing the original alarm reading by an amount on the order of Measured values can be calculated.

Therefore, with this method, the measured values of the alarm will not be lost. Another advantage is that the reporting center measurement device does not need to be perfectly accurate, but only needs to be relatively accurate.

Advantageously, the period for switching over to the indicator of the alarm or for making a predetermined change in the alarm measurement value is determined by another time element in the alarm, depending on the indicator of the alarm. be. This second timing element is then controlled by a switching command. The switching period or measured value change period is set by means of this second timing element to the period of one or more detection cycles. Therefore, even when detection is performed many times in succession to ensure transmission,
It is possible to detect the alarm sign and transmit it to the notification center.

Furthermore, the device to be solved by the present invention is described in claim 4.
The problem is solved by a configuration having the features described in Items 1 and 6. In known annunciators which receive control commands according to the method mentioned at the outset, a switching device, a further timing element and a beacon transmitter are additionally arranged for the method according to the invention.

In the device according to claim 4, an analog measured value is sent from the measuring transducer via a switching device to the first timing element. In this case, the switching device is formed by a changeover switch. The second timing element is connected to the first timing element and the threshold switch via a coincidence element.

The changeover switch is switched into the second switching position by means of this second timing element. At this time, an indicator indicator is applied to the second input of the changeover switch from an adjustable indicator transmitter. The changeover switch is therefore arranged between the indicator transmitter, the measuring transducer and the first timing element and is switched by the second timing element. When a signal is applied to the second input of the coincidence element which is upstream of the second timing element, the control command or switching command that is present via the threshold switch is transmitted to the second input via the coincidence element. Added to the timed element.

In the device according to claim 6, in order to change the measured value of the alarm in a predetermined manner, a switching device belonging to the beacon transmitter is provided in each alarm. Each annunciator has a threshold switch connected to a coincidence element for receiving control commands. A signal is applied to the coincidence element at its second input only during the running time of the first timing element. The coincidence element therefore transmits the switching command appearing on the reporting line to the downstream second timing element for this period of time. The second timing element controls the switching device belonging to the beacon transmitter for a period defined by the cut. The indicator transmitter is connected in parallel with the 111il constant value converter, so that the alarm measurement value is fed via the indicator transmitter to the input of the first timing element. If the switching device is not controlled, the unchanged alarm reading will be the first
reaches the timing element. When a switching command is provided to a given annunciator, the annunciator reading changes by a predetermined value that can be set and adjusted on the beacon transmitter.

Embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a basic block diagram of an alarm according to the present invention. In this case, the alarm has a beacon transmitter for switching to the annunciator beacon. The alarm M is connected to a notification center (not shown) via a notification line ML.

The reporting line ML iI'i consists of conductors 1, 2, between which a voltage U is applied. The annunciator M has a timing element T1 which operates when a voltage U is applied, the delay time of the zero timing element T1 being controlled by a measuring transducer MW. At the beginning of the detection cycle, the line voltage U is interrupted briefly for synchronization. Since the timing element T1 is activated only when the voltage U is applied, the capacitor c
1 is provided. Capacitor C1 supplies measuring transducer MW during the short time when voltage U is interrupted. In this case, diode D1 prevents reverse current feeding. A threshold switch SW is also provided in the annunciator M, which compares the voltage applied to the notification line ML via the voltage divider R1/R2 with a predetermined threshold value sw.

If, during the operating time of the timing element T1, the voltage of the reporting line ML changes to such an extent that the threshold switch SW responds, the simultaneous occurrence of these two signals is evaluated as a control or switching command via the coincidence element KO (5). The output signal of the coincidence element KO causes the second timing element T2 to operate for a predetermined time, which time is adjustable or at least as long as the next detection cycle. The timing element T2 of 2 controls the changeover switch US.This changeover switch US id measuring transducer M
"JJ" and the first timing element T1. A measuring transducer MW is connected to the first input E1 of the changeover switch US in order to detect the measured value of the alarm. .

The output A of the changeover switch US is connected to the input E of the first timing element T1. A beacon transmitter consisting of resistors R3 and R4 is connected to the second input E of the changeover switch US.
In all embodiments of the invention connected with 2,
The indicator transmitter (R3/R4) is formed from a voltage divider R'3/R4. In the embodiment of FIGS. 1 to 3, this voltage divider is connected to the lines 1, 2. Voltage divider R3/R4
The middle tap is the second input side E2 of the changeover switch US.
is connected to. The voltage division ratio of voltage divider R3/R4 is adjusted to a predetermined value depending on the type of alarm. Therefore, the voltage on the input side E2 of the changeover switch US is
It will represent the alarm indicator (for example, the type of alarm). This indicator is transmitted to the notification center instead of the measured value during the next detection cycle.

Control is also carried out by the notification center, so that the received signals are regularly read out and processed as notification indicators. In the notification center, the type of alarm in question is stored as an indicator in a memory provided for this purpose, so that it can be read out for evaluation of the alarm. After the adjustment time of the second time limit T2 has elapsed, the changeover switch US returns to its initial state. The analog measuring signal of the tumbler and annunciator is again applied to the first timing element TI. Therefore,
In the alarm M shown in FIG. 2, which can also transmit the measured value to the notification center at the time of the next detection, the changeover switch US is connected to the changeover contact E1. E2. Relay REL with A
It is formed from. The timing element T2 also consists of a monostable multivibrator MF and a Re element RT, (ET) following it. The output of the monostable multivibrator MF controls the relay REL, so that the switching position of the relay is set to El. to R2. Therefore, in the next detection cycle, the voltage of the voltage divider R3/R4 is applied to the input E of the first timer T1.

FIG. 3 shows another embodiment of the alarm M. Here, the changeover switch US is formed by an analog changeover switch AS. Timing element T2L! It consists of an i capacitor c2 and a resistor R5. Capacitor c2 is slowly charged to the line voltage via resistor R5. When the coincidence element KO receives a switching command, its output signal controls the transistor TR2. This transistor thereby conducts, discharging capacitor C2. Capacitor 021F? The applied voltage controls the analog changeover switch AS via the control input St. In other words, if a small voltage is applied to the control input side of the analog selector switch AS, the alarm indicator signal will be output to the input side E.
2 to the output side A. Conversely, if a high voltage is applied to the control input St, the annunciator measurement signal flows from El to A. In this case, the switching period consists of resistor R5 and capacitor c
Settings can be adjusted using 2.

FIG. 4 shows notification 5 according to the present invention. It is a block circuit diagram of M. Here, the alarm MVi is connected to the notification center via the notification line ML. The reporting line ML consists of conductors 1 and 2, between which a voltage U is applied. The annunciator is provided with a timing element T1, which is activated when a voltage is applied. In this case, the running time of the timing element T1 is controlled by the measured value transducer MW. At the beginning of the detection cycle, the line voltage U must be interrupted briefly in order to achieve synchronization. Therefore capacitor c
1 is provided for supplying voltage to the measurement value transducer during the cut-off time. In this case, diode D1 prevents reverse feeding of the voltage.

The threshold switch SW changes the voltage applied to the reporting line ML via the voltage divider R1/R2 to a predetermined threshold value sw,! l
Compare. If, during the operating time of the timing element T1, the line voltage changes such that the threshold switch SW responds, the simultaneous occurrence of these two signals is evaluated as a control command via the coincidence element KO. This control command is used as a switching command to change the measured value of the alarm in a predetermined manner. In this case, the control command is transmitted via the 20th timing element. The time for changing the measured value can be set and adjusted by this timer T2. The second timing element T2 is formed from a monostable multi-bibreak MF.

The monostable multivibrators M, F are triggered by the output signal of the coincidence element KO and the control command is stored therein at least during the detection period. This storage time is determined by Re elements RT' and OT. The output side of the monostable multipipe lake MF controls the switching device SE.

The switching device SE has a first transistor TR44. Transistor TR4 has high resistance, and resistors R6 and R
7 to block the second transistor TR3.

Therefore, a voltage divider for setting and adjusting the indicator of the alarm, consisting of resistors R3°R4, comes into play, and its voltage dividing ratio R3/
The indicator of the annunciator, which reduces the output signal of the measuring transducer MW corresponding to R4, is determined by the voltage divider R3/R4. RT
After a period of time determined by and OT, the monostable multipipe brake MF returns to a stable state. Therefore, transistors TR3 and TR4 have low resistance, and resistor R3 is short-circuited. The knob voltage divider R3/R4 becomes inactive.

The entire output signal of the measuring transducer MW is therefore again applied to the input side of the timing element T1.

FIG. 5 shows a modified embodiment of the device of FIG. Here, analog switches A and S are provided in place of transistors TR3 and TR4. Also, monostable multi-
The ζibrator MF has been replaced by capacitor C2 and resistor R5. Capacitor C2 is connected via resistor R5,
It is charged to the voltage applied to capacitor C1.

Upon receiving a switching command, the output of coincidence element KO controls transistor TR2.

As a result, the transistor TR2 becomes conductive and the capacitor C2 is discharged. The discharge voltage of capacitor C2 controls analog switch AS via a control input. If the current applied to the control input St is small, the input E and the output A are connected with a high resistance in the analog switch AS. In this case, the reduced alarm measurements including the beacon are transmitted to the notification center. When input F and output A of analog switch AS are connected with a low resistance, ie when transistor TR2 is blocked and capacitor C2 is charged, a net measured value is transmitted to the reporting center.

The time constant of the timing element T2, that is, the element MF fX, IR
The storage time of 5 and 02 is determined as follows. That is, in order to reliably detect transmission errors, the alarm indicator may be transmitted to the reporting center only once, or
This time is determined so that several detections are transmitted when they are performed in succession.

[Brief explanation of drawings]

FIG. 1 is a block circuit diagram of an embodiment showing the principle structure of an annunciator of a device according to the invention for selectively recalling and detecting an annunciator indicator and an annunciator measurement value, FIGS. is a block circuit diagram of a modified embodiment of the alarm shown in FIG.
Fig. 4 is a block circuit diagram of an embodiment showing the principle structure of an alarm for changing the measured value of the alarm as determined, and Fig. 5 is a block diagram of a modified embodiment of the alarm of Fig. 4. It is a circuit diagram. M...Alarm, ML...Notification line, MW...Measurement value converter, US...Selector switch, Tl, T2...
- Timing element, SW...threshold switch, KO...coincidence element, REL...relay, MF...monostable multivibrator, AS...analog switch, SE...switching device.

Claims (1)

[Scope of Claims] 1. It has a notification center and at least one notification line, and a plurality of alarms are connected to the notification line in a chain, and each of the alarms periodically performs detection. , the timing element, which is controlled by the measurement value of the annunciator via the measurement value converter, starts operating at the moment characterizing the annunciator address and also during the running time of the associated timer element for a given annunciator. A method for automatically detecting alarm readings and/or alarm markings on a reporting device, in which a control command is generated on the reporting line and supplied to the alarm in question, (M) evaluates the control command that arrives during the running time of the timing element (T1) belonging to the annunciator as a switching command, so that the measured value converter (MW ) to the beacon transmitter (R3/R4) provided in each alarm (US), and switch the timer (Tl) from the beacon transmitter (, R3
/ R4) or set or adjust the characteristic time during the switching period to the beacon transmitter (R3/R4).
) to change the alarm measurement value by four predetermined values (S
E), further switched within the reporting center (US
) Measured values of the alarms and/or alarms, characterized in that the indicator of each alarm (IV) is detected from the running time of the timing element (T1) or from the amount of change in the original measured value of the alarm. How to automatically detect signs. 2. Control a second timing element (T2) according to the switching command detected by the corresponding alarm, and the second control element determines the switching period of the changeover switch (US), or the measured value of the alarm. The measurement value of the alarm and/or the indicator of the alarm according to claim 1 is automatically changed by controlling the period during which the switching device (SE) is turned on and connected in order to change the alarm by a predetermined value. How to detect. 3 The period during which the beacon transmitter (R3/R4) is activated via the changeover switch (US) or switching device (SF)
A method for automatically detecting alarm measurements and/or alarm indicators as claimed in claim 1 or 2, wherein the duration of the detection cycle is longer than the duration of the detection cycle. 4. It has a notification center and at least one notification line, and a plurality of alarms are connected to the notification line in a chain, and each alarm uses a measurement value converter during periodic detection. The timing element, which is controlled by the measured value of the annunciator via, starts operating at the moment characterizing the annunciator address, and during the running time of the associated timer element, the control command for the given annunciator is transmitted to the notification line. generated and supplied to the relevant annunciator, and each annunciation Tfr (M) has a threshold switch (SW) and a coincidence element (KO) connected downstream thereof, in order to evaluate the switching command;
The second input side of the coincidence element is connected to the output side of the first timing element (T1), in which the measuring value of the alarm device and/or the indicator of the alarm device is automatically set to 1 in the reporting device.
In order to set and adjust the switching period, the second timing element (T2) is connected to the coincidence element (KO
) and each annunciator (M) has a second timing element (T1) in order to switch the first timing element (T1) from the measured value transducer (MW) to the indicator transmitter (R3/R4). Element (T
2) Has a changeover switch (US) that can be controlled by
The first input terminal (El) of the changeover switch is connected to the measuring transducer (
MW) and the second input side (R2) is a beacon transmitter (R3/
indicator R4) and further characterized in that the output side (A) is connected to the input side (E) of the first timing element (T1). f: The automatic detection device 5, the beacon transmitter, is connected to the voltage divider (R3/R4) in parallel with the reporting line (, ML-,).
), the middle tap of which is connected to the input side (R2) of T2 of the changeover switch (Us), automatically detects the measured value of the alarm and/or the indicator of the alarm according to claim 4. device to detect. 6. The second time element (T2) is an RO element CRT, CT
) followed by a monostable multi/ζ isolator (MF), and the output side (mutual) of the monostable multi/ζ isolator
5. A device for automatically detecting a measured value of an alarm and/or an indicator of an alarm as claimed in claim 4, wherein the changeover switch (US) is controlled by a changeover switch (US). 7. The second time element (T2) is a capacitor (02),
Device for automatically detecting alarm measurements and/or alarm markings according to claim 4, comprising a resistor (R5) and a transistor (TR2). 8. The changeover switch (US) is configured to automatically change the measured value of the alarm and/or the indicator of the alarm according to claim 4, wherein the changeover switch (US) consists of a relay (REL) having changeover contacts (El, R2 and A). A device that detects 9. Switching switch f-(us) is on the control input side (st)
5. Device for automatically detecting alarm measurements and/or alarm indicators as claimed in claim 4, comprising an analog changeover switch (AS) having an analog changeover switch (AS). 10. It has a notification center and at least one notification line, and a plurality of alarms are connected to the notification line in a chain, and each alarm has a measurement value converter when performing periodic detection. The timing element, which is controlled by the measured value of the annunciator via the alarm, begins to operate at the moment characterizing the annunciator pulse and, during the running time of the associated timer, controls the control for a given annunciator. A command is generated on the notification line and is supplied to the relevant alarm, and the threshold switch (SW) and the coincidence element ( KO),
A device for automatically detecting an annunciator reading and/or an annunciator indicator in an annunciating device, wherein the second input side of the coincidence element is connected to the output side of the first timing element (Tl), In order to set and adjust the switching period for changing the measured value, a second timing element (T2) is connected downstream to the coincidence element (KO), and each annunciator changes the measured value of the annunciator to a predetermined period 9. In order to do this, a switching device (SE) controllable by a second timing element (T2) is provided.
, the switching device belongs to the beacon transmitter (R3/R4), and the output side of the measuring transducer (MW) is connected to the beacon transmitter (R3/R4), and the beacon transmitter is connected to the first beacon transmitter (R3/R4). A device for automatically detecting measured values of an alarm and/or indicator of an alarm), characterized in that it is connected to the input side (E) of a timing element (T1) of a device. 11. The indicator transmitter consists of a voltage divider (R3, /R4) connected in parallel with a measured value converter (MW), the intermediate tap of which is connected to the input side (E) of the first timing element (T1). measurement value and/or notification of the alarm according to claim 10, in which one resistor (R) of the voltage divider (R3/R4) is connected in parallel with the switching device (SE). A device 12 for automatically detecting a label on a container; a second timing element (
T2) consists of a monostable multivibrator (MP) followed by an RO element (RT, CT), and the output side (TE) of the monostable multivibrator is connected to a switching device (SE). A device for automatically detecting the measured value of the alarm and /-1, the indicator of the alarm in the reporting device according to item 10. 13. The switching device (sg) is connected to the first transistor (TR
4) and a second transistor (TR3) connected downstream to the transistor via a resistor (R6, R7). or a device that automatically detects alarm signs. 14. The switching device (SE) is formed by an analogue switch (AS) having a control input (st), and/or automatically changes the measured values of the alarm and/or the indicator of the alarm according to claim 1o. A device that detects