DE1907585C3 - Arrangement for remote display of changes in any physical quantity - Google Patents

Description

^{th 4d} order according to claim 3, characterized in that g. indicates that the first Trans.stor (ßl and ₃ T speaking display device (16) in al ^ ansp _q ^ ^ j _ur

^ g of _the transmission line (12) is used.

one

_Frfindune concerns an arrangement for long-distance The Erfadui «De ^ any phy _S1 ka-

^ eh? size in eS central station, acting through their panties ^Gr ° ^ß ^ ⁿ ^ _{n electrical} rule switch ^Α ^^ ^{_α Ά} "^ multivibrator in a elektrinut a J ^ ™™ ™ _{a A} i _poor inrichtung to see circuit undjmt _influencing

Draw! «Of an alarm _alternately conducting

^ £ ¹ 'having _e S _tr Onsche switch.

electron _{especially as}

g _{Vewendu in}

_{with protected Ge} .

Operable facilities, ^^^ signal that a

Raid ^stat ™ ° «· _e i _ektrisc her Schutzeinrichtun-Der ⁱⁿ Jer Techmk e'e ^. ^ ^. ^

some type of cen- & ^ JJ ^ _n As used herein the spectral Sign ^alem £ f ^s ™ to a somewhat broader term "Central Station." - ^ i ^ _ther away meaning tzen _be md ^e r a οU

Places include where bigna ^ ρ ^ ^

can and at 4 ™haben ™ ^r and the police station

can be ^^ B wax ¹ ^ _n _

nen. The expression ^ DfH * _büberfa “ _{and a}

Except for the situation on which the attack is shaded by a υ _Jm

extraordinarily ^r f ^ch _em ^ _e ^{r W} _{wöh nlichen} burglary, difference ^ B ^ mem to ge _{through {u} h-

which 8 ^ ° ~ _ο ^^ i dnem slump also tion ^erf ° ^r * - ^rt "^ * ^ ™ is derfich, so this is a rapid Reag ^ J ™ J" _{fi at a raid.}

usually ^{n 'cht} _{(^ e} ° ^"n Ä ^ _edo ch general The ^A _v ffruck" raid "soUjeag ₆

_{] ene} novations include, ^ we

neat rastejjg ^^ ^ra . _facilities

Commercial »^. ^^ Sridhtungen provided, «" ^ Usually mtSchutemnnchug

which beun Emtnt t ^ s Emdnngiig j

_{dare to signal} J ^ ^T J ^; _e n, emtntts to an ^ en ^ n ^ turn to which a servant _w " _h

2hick, Wjg
hours

Buildings

, there

t ^ rl-ng after e, n _em de, claims to 4, characterized ^ indicates that in the Ze ,, - 3 ^

, ion, bound, and even if none SchuKemnchlung, n Betneb Bt m «t

^ Τ ^ the O _£ rv ",

3 4

Hand-operated switches are provided, which transmit, this control line also licher way are hidden. This switching can be monitored by quiescent current (DT-AS ter can be actuated to the entry of a 1125 321). Relays are attacked by signals to signal so that a rapid rea- controls are sent from a remote central station yaws by the police or other suitable 5 authorities to control lamps len can be done. Because of the turn on in a hold-up traffic light signals. The control situation existing extraordinarily urgent- takes place via the central station, which among other things It was common practice to deliver this to the central station via a synchronous motor, one driven by this carried hold-up alarm signal distinctive, has shift drum and control contacts, wherein d. H. from the usual interruption and earth- io the latter through the switching signal to change the To make signals easily distinguishable. Signal polarity are actuated. Because of their far-

There are numerous forms of hold-up alarms; however electromechanical construction is also possible

devices as part of electrical protection - this arrangement is very vulnerable.

systems known. In one that has been around for a long time, there is also an arrangement for transmission Time known ÜberfaU-A'armeinrichtung is one of 15 audio-frequency signals known, in which by means of a Manually operated switch with rest and work astable multivibrators alternating with two sub-contacts and a relay with a weighted different frequencies over a single line Armature and in series with the relay coil and can be transmitted (DT-PS 1 183 970). One Switch make contacts switched break contacts use of the multivibrator to trigger a intended. The monitoring current flows through the 20 alarms, but is not described in this publication. until he imagines by pressing the.

Switch is interrupted. The ensuing further is an arrangement for remote indication of the interruption of the monitoring current allows the change of any physical quantities of the waste facility in the central station in the activity mentioned at the beginning a transistor is energized the relay, and it again determines the switching state of the multivibrator and monitoring current flows, but through the relay coil also a signal lamp through the multivibrator and not through the break contacts. Is fed by. With this arrangement, however, the excitation of the relay, its normally closed contacts can easily trigger a false alarm,
opened, whereby the relay is de-energized and the 30 The invention is based on the object of a monitoring current is interrupted again. The arrangement of the type specified at the beginning of the relay is then continuously energized one after the other, through which increased security and, however, ^r <; gt, namely with a repetition frequency, is achieved against the triggering of false alarms,
which depends on the mechanical constants of the component. The relay typically performs three working 35 one of the multivibrator switches the conductive closing cycles per second. A special relay or stand of a transistor having electrical special contacts at the waste device in the see switch determines that the alarm signal only central station respond to the interrupted with successive conductive and non-current flow in order to signal a raid-signaling-conductive state of the transistor a follow-up reset determined by the direction in the central station in action to 40 the astable multivibrator. sequence can be triggered and that of the electrodes of the

Robbery alarm systems of the type described - transistor two with the one with the central station - have proven to be useful in principle. It tied up a transmission line and lacks reliability and interferes with the multivibrator,
smooth operation. 45 With this arrangement, a false alarm can

Furthermore, a detector and a receiving unit are to be avoided, as an alarm is triggered by a Direction known, the Leitendeiner occurring over certain pulses of predetermined repetition frequency Control disk due to interruption of the quiescent current and a non-conductive of the transistor Identify the individual detectors in a loop - triggered under control by the multivibrator new (section »Fire alarm systems« from Hut IV B 50 becomes.

Telecommunication technology 1962, pp. 772, 773). The advantages achieved with the invention are mainly

Spring drive driven control disks are special in that due to the use

however, very vulnerable, so that largely electronic electronic circuits instead of electromechanical ones

working facilities are preferred. Devices switching errors to a minimum

It is also known to be set by means of a pulse 55; furthermore, a false generator current amplification impulses from a central alarm are largely avoided, since the alarm is given as a function of the signal to a branch office; The conductive and non-conductive state of a transient is monitored via a resistor through quiescent current _s tor with a predetermined repetition frequency (DT-AS 1132 033). The control is effected by the _un ter control of a transistor of the beiZentralstation of which is carried a receiving relay 60 in the transistors having astable MuHivibraeiner remote from the central station controller tors. Even if there is a break in the controls. Because of its electromechanical structure, should this occur, it would not have any drawbacks associated with this system. Generate false alarm. The same is true in the case of one

It is also known to short-circuit by direct current. Furthermore, the electronic

different polarity and direct current of various 65 switches and the two transistors of the multivi

Strength or also direct and alternating current interrupters only by a positive manual

different polarity, more than two signaling or i _un g _m operation can be set, namely by loading

iWMWii via a single control line to because of the two switches from their idle to their

prevents the monitoring current from flowing over a stream. ^ _{dcs off} .

nfi2 shown The transferable hold-up switches H 1 or 7/2, em Le, ter22

Diodes D 6, Ol and D 8. In the return current path

%; S ™ ^et0 ^ Tfiter on. Instead of the tone generator 20 (if provided), the SÄn also has a single burglar alarm circuit 18 and which can also be used for this purpose, such as a ladder 19 leading to the central station.

Conductor with erdrucktunrung used. Conductor 19 is to the fixed connections

In the line terminal 10 are a Einrich- "von Arb, itskontakten Wl-M and M-Hl of the above-J'n _TO r detection and display of a managerial latch switch H 1 and H 2 tunLbruches connected a device 14 for determining the Overfail alarm switches H 1 and f / 2 are ζ. Β

and AnS e "es earth fault of the line and concealed Sehalter with a mrt rine Bauerie 15 provided for the central station, a first fixed contact connected wobefdee devices in series between the * 5 movable contact, which together Ruhckon- 7 Ί mtf high potential and When the switch is operated, the movable contact of the first will be fixed in accordance with the transmission line pSvem potential property below contact closed, which called together briefly> 7 pms-Leker, "and called the other conductor, 30 nachfofgend _kur to the movable contact the Arbeitskontaktc for snus Head," is making overall. the fixed contact each Aibertskon- S As will be explained further below, the clock can also be connected to the conductor 19 Hn? Mk ihTem positive pole earthed source when a the hold-up alarm switch is activated

standing changes of the Schahung is used, then the current on the transmission ^{w P} earth I ^ RVine mh ⁸ the devices 13 and 14 35 line by means of a circuit with a Trans.-Lr central station can lead to a further down disturbance β 1 and a cancel Multivibrator 23 with the described purpose to be made on audio-frequency signals transistors Q 2 and Q 3 with a certain W, e-5 £ fc KnrichSniie. The repetition frequency, for example 3 Hz, increases and the circuit 13 responds to Wn AMdI of the line, whereby the device 13, η of the central current below a predetermined value and gives 4 <> station is put into operation, to there a Lherdann emits a signal by which to indicate a line fall.

interruption is displayed. The device 14 The transistor Q \ is with its emitter to the

“Star Zunatane of the conduction current over points and with its collector over a rod

eSen indicates another predetermined value and then indicates 24 at a connection of a Zenerd.ode D >> 9 un I.

a signal. which a ground fault of the line «5 connected the plus connection of a capacitor CS

• ° 'closed. The other connection of the diode Dy una

^ Bd the protected building is the positive conductor the other connection of the capacitor C 5 are on

the transmission line 12 via a current-limiting conductor 22. Em resistance Ki

zuLswiderstandl7 and one with ABCOE coupled base and emitter of the transistor; ßl. Em

7 branch to a terminal of a conventional resistor R 2, a capacitor C 4 and em \ Vider-

Common local protective circuit, such as an input R 3, which are in series, couple base and

break alarm circuit 18 connected. Another collector of transistor β 1.

Burglar alarm circuit terminal 1 »is across The emitters of transistors Q 2 and Q 3 are ar

a conductor 19 is connected to the minus conductor of the transmit conductor 22. The collector de;

eunesleitune connected. As shown in the drawing 55 transistor Q 2 is at the junction _u e.

a tone generator 20 can be seen in series between resistor R 2 and capacitor C 4 angc

see the circuit point E and the circuit 18 closed and via a diode D1 and a resistor

The purpose of the tone generator 20 is connected to the conductor24 stand /? 4. The excrement

described below. The tone generator can lektor of the transistor β 2 is via a condenser

can also be omitted, and the point E can also be coupled to its emitter, tu

can be connected directly to circuit 18. Capacitor Cl with a polarity, as from de

The intrusion alarm circuit can be seen from any drawing that couples the connecting part

be of a type which is connected in series between the two diode D 1 and the resistor R 4 with the ver

the conductor of a transmission line is connected to the resistor R 6 and de

can. The circuit 18 includes e.g. B. Door and 65 diode D 3. Between Ldter 24 and 22 there are 11

Window contacts, light barriers, on sound and in series a resistor R 6, a diode D 3 and en

Changes in the capacitance responsive Einrich- resistor R 9 switched

hmoni Between the conductors 24 and 22 there are also ei

Resistor R 5, a diode D 2 and a resistor Fl8 connected in series. The base of the transistor Q 2 is connected to the junction of the diode D 2 and the resistor R 8 and also connected to the point E via the diodes D 4 and D 5 connected in series.

The collector of the transistor Q 3 is now connected to the Lciter24 via a resistor R 7 and coupled to the junction of the resistor Λ 5 and the diode D 2 via a capacitor. The base of the transistor Q 3 is connected to the junction of the diode D 3 and the resistor R 9.

A ZcnerdiodeD 10 is connected between the points A and E to the voltage occurring across the electronic components z. B. to bcgrenzen to 82 full and thus protect the components from overvoltage.

When the switches adopt the switching positions shown in the drawing, the branch ABCD creates a shunt branch between points A and D. Since there is no operating potential for the transistors, they all remain non-conductive. All capacitors are discharged in the same way.

In the event of an attack to be signaled, the branch / 4 -BCD is interrupted by actuating switch H 1 or switch H 2 (or both) and by opening the rest contact H \ -B or H 2-ß accordingly.

When the shunt branch ABCD is interrupted. a current flows from point A to point £ through the parallel connection of the base-emitter path of the transistor Q 1 and the resistor R 1 and the following three circuit circuits:

a) Resistor R 2nd capacitor C 3rd conductor 22 and diodes D 6. D 7 and D 8:

K) Resistor R 2nd capacitor Γ 4th resistor R 3rd resistor R 5th diode D 1 and diodes D4 and DS:

c) Resistor R 2. Capacitor C 4. Resistor R 3. Capacitor C 5 and Diodes D 6. D 7 and

The voltage appearing across diodes D 6 and D 7 and D 8 biases the base of transistor Q 2 negatively through diodes D 4 and 0 5. thereby preventing it from becoming conductive. This prevents the multivibrator Q 2. Q 3 from starting up and generating a false hold-up alarm signal if a random interruption occurs in the line ABCD , which connects the various hold-up switches. An accidental grounding of the line A -BCD cannot cause a false attack signal, since the electronic circuit would be shunted by the line ABCD. The hold-up alarm signal can only be initiated by an interruption, which is then followed by grounding the line A -BCD , as will be described below.

The initial current flowing through the three designated branches is small and leads to only a slight charge of the capacitors C 3 and C 4 and a very slight one. Charging of the capacitor C 5. * ~ "

When the moving contact of the actuated panic switch is closed with the mating contact.

ie if the contacts H \ -M or H 1-M are closed, earth potential is applied to point D. A larger current now flows through the three branches shown above, the capacitors C 3, C 4 being charged. By increasing the base current through the transistor Q 2, which causes the emitter-collector circuit of this transistor to become partially conductive, and by increasing the base current and consequently the collector current of Q 1 , the capacitor CS begins to charge rapidly. At the same time, by applying earth potential to point D, diodes D 6, V "> and /) 8 are shunted, whereby the negative bias voltage at the emitter of transistor Q 2

¹ S disappears. Since the shunt created by the diodes D 4 and D 5 and the intrusion alarm circuit IS, which is parallel to the base-emitter path of the transistor Q 2, are not sufficient to prevent conduction of the transistor Q 2, the multivibrator is ready for operation, when the capacitor C 5 is sufficiently charged.

The multivibrator has, as can be seen from the drawing. Transistors Q 2, Q 3 and their associated capacitors and resistors. How general

^{1S me} ' ⁿ with astable multivibrators. each transistor can become conductive first, which depends on factors such as transient processes, structural tolerances, etc. It should therefore be assumed that the transistor Q 2 first becomes conductive when the capacitor C 5 is sufficiently charged to supply a base current to the transistor Q 2 via the resistor R 5 and the diode D2 and a current via the branch with the resistor R 7, the capacitor C2 and the diode D 2 to flow, and

³ S when the capacitors C1 and C2 are charged with the polarities shown in the drawing.

_If ~ _dcT transistor (? 2 is conductive, ^ can through

_its collector-emitter circuit a current to the limittcr-base-Kuris of the transistor Q 1 flow, where-

<° becomes fully conductive through this. The capacitor C 5 is fully charged due to the increased current through the F.mittcr-collector circuit of the transistor Q 1. The discharge capacitor also flows through the pair with the resistance R 6

45Cl. the diode D 1 and the collector-emitter path of the transistor (J 2 a current to the ground point D. The voltage across the capacitor Cl biases the base of the transistor Q 3 negatively, whereby this capacitor is kept in the non-conductive state, until the capacitor C 1 is discharged so far that the transistor Q 3 is no longer biased negatively, the transistor Q 3 then becomes conductive and draws a base current through the resistor R 6 and the diode D 3 and a current flows through the Resistor R 5, the discharge capacitor C2 and the collector-emitter path of the transistor Q 3 to the ground point D. The voltage drop across the capacitor C 2 biases the transistor Q 2 negatively and makes it non-conductive for this moment.

When the transistor Q 2 becomes non-conductive, the base current branch for the transistor Q 1 drops out (the capacitors C 3 and C 4 are open by then.

load), and the transistor Ql becomes non-conductive. The transmission line to the central station is open, the transistor Q 1 being non-conducting and the line A -BCD to the actuated con-

609 643/395

ίο

clock H ί-Β or H 2-B is open. This operating state, being only shifted by half a period, represents the beginning of an interruption. The system continues to work with a repetition frequency period of the intermittent attack alarm signal, as indicated by the time constants of the Multidar. vibrators is determined until the actuated attack

The transistor Q 2 remains negatively biased, 5 switch is reset and thereby the secondary until the capacitor C2 is sufficiently discharged, circuit / 1-BCD is restored. The Konum overcomes the bias, after which the capacitors discharge then through their associated transistor Q 2 conducts again. Since the transistor Q 1 has resistances, and the system returns to its now non-conductive, a base current for normal state is returned.

The transistor Q2 from the capacitor C 5 to-io The Zener diode D 10 eliminates approximately on the transfer (whose function is to supply a current for the transmission line occurring high voltage spikes.
Multivibrator to be delivered if the transistor Q 1 If the system with a positively grounded Bat is non-conductive), whereby the current is to be operated via the resistor in the central station, R 7, the capacitor C2 and the diode D 2 must be pnp transistors and npn transistors flows. When the transistor Q 2 is conductive, the 15 is switched on again by npn transistors or pnp transistors erTransistor Qi , and it flows a sets. Likewise, the polarities of the current from point A to the capacitor CS such as diodes and capacitors must be swapped,
to charge and as a result of the breakthrough to monitor the system with regard to

Zener diode D 9 to be connected to earth. Due to the breaks and earth faults of the transmission Zener diode D9 a constant voltage for 20 line and the shunt branch A -BCD is created a multivibrator and the charging of the tone generator 20 is provided, whose output coil 25 capacitor DS is limited. in series between point E and a burglary

Turning on the transistor Q \ marks the alarm circuit 18 is switched. The tone generator end of the interruption period and the beginning superimposed an AC voltage signal with z. B. the EH period in the signal sequence. The transistor Q 3 25 1000 Hz the normal direct current. In one becomes conductive again when the charge of the condensate interruption or a ground fault of the ÜbersatorsCl the reverse bias voltage over the transmission line or the branch ABCD can overcome the resistance R 6, and the multivibrator audio frequency signal does not experience the central station continues, the transistors Q 2 and Q 3 up and down. Disable the presence or absence. Whenever the transistor Q 2 becomes conductive through an audio frequency signal on it, the transistor Q1 is conductive and the responsive device 16 on the central Sta transmission line 12 is applied to ground potential. tion detected, and an absence of the audio frequency-If the transistor Q 2 is non-conductive, the signal indicates an error condition. If only transistor Q 1 is non-conductive and the transmission line is to be monitored on the transmission line, line 12 can cause an interruption. 35 the tone generator 20 between the positive conductors of the

If the transistor Q 3 at the beginning of the transmission line and the resistor 17 or drive of the multivibrator had first become conductive between the resistor 17 and the point A , the sequence would be the same and would be switched.

1 sheet of drawings

Claims (3)

Patent claims: 1. Arrangement for remote display of the other genes of any physical size m a central station, which acts through its changes on an electrical switch, with an astable multivibrator in an electrical circuit and with an alarm device for triggering an alarm under the influence of the multivibrator, which two. has alternating conductive and non-conductive electronic switches, characterized in that one of the multivibrator switches (Ql) determines the conductive state of the electrical switch having a transistor (Q 1), that the alarm signal is only given when the transistor is consecutively conductive and non-conductive (ÖD with a through the astabi len multivibrator specific repetition frequency can be triggered and that of the electrodes of the transistor (Q 1) two with the line connected to the central station (10) of a transmission line (12) and one with the multivibrator are connected. 2. Arrangement to claim 1, characterized in that the central station (10) has current-sensitive interruption and earth fault indicators (13bzw.l4) which after excitation by the successive becoming conductive and non-conductive of the transistor (Q 1) trigger the alarm signal a. 3. Arrangement according to claim 2, characterized in that the emitter electrode of the Trans: stors (ßl) is connected to the high potential lying conductor of the transmission line, that the collector electrode des.Tractors (Ql) via a further switch (Hl, H 2 ) is connected to the low potential of the transmission line (12) lying conductor and that the base electrode of the transistor (Q 1) is coupled to the multivibrator, the latter having second and third transistors (Q2 and Q31, respectively, which are electrically connected between the second electrode of the first transistor (Q 1) and the further switch are connected and a Zener diode (09) which is connected to the first transistor (Ql) and is conductive when the transistor is conductive between its emitter electrode and its collector electrode, and that a capacitor ( CS) parallel to the Zenerd.ode (D9) and to the multivibrator to create an operating potential for the latter is done when the first door ansistor (Ql) mchüei-