DE2508449A1 - Sound signal transmission system - uses the already existing internal wiring as a transmission network - Google Patents

Abstract

The system comprises several pieces of radio telephone equipment, each with interference suppression provision and with an amplifier for h.f. sound signals. The circuit for attenuation of the received signal h.f. part includes a microphone loudspeaker, an oscillator and a modulator and an indicating circuit. The apparatus is supplied from the mains. It has further a ringing unit consisting of a series connected indicator, a self-holding relay circuit and a ringing generator, in parallel with a D.C. source and a coupling circuit for signal transmission. The D.C. source is also connected to the mains.

Description

Sound signal transmission system using an existing one Indoor pipe installation In the past, the requirements for acoustic signal transmitters, i.e. in-house telephones and alarm transmitters for crime prevention, significantly increased. However, most of the were designed for this purpose Devices do not prevail because they have a complicated structure, which the endeavor shows to introduce faults which mean malfunction or non-operation of the device and often take special precautions and settings require prior to use, and because there is a high cost of action to their Eliminate influence over the other consumer. Therefore, there is a need for an on-signal transmission system with a simple and adaptable structure, which using an already existing indoor pipe installation is operated and does not allow a special circuit for operation. However show tapped voices or interception signals, which are transmitted by means of a wireless intercom system can be transmitted via the normal supply installation for lamp consumers Aiming to be disturbed by background noise including one from the other consumer generated high-frequency components, such as those from fluorescent lamps, motors or the like is delivered. The output of such a wireless House intercom is modulated on high frequency and subjected to a carrier effect, However then subjected to the aforementioned disturbances, thereby reducing the signal-to-noise ratio deteriorated and the efficiency of the house intercom is reduced. There were various types of circuits have been proposed to reduce this interference. However, such circuits must have a complicated structure in order to To fulfill the intended purpose also require an adjustment on the part of the user for the purpose of correct operation and result in spite of all corresponding Preparations do not produce satisfactory results.

Regarding an alarm transmitter to indicate any unusual Events such as an unusual opening of a door or window midnight hour, there was usually a special circuit between the Transmitter and the recipient required. In this case, users will sometimes not informed of a coincidence, so the circuit is accidental or by design is switched off, which leads to the failure of the operation of the device. Furthermore are additional facilities for the tone sensing system required. The wiring requires a precise and complex system that must be so hidden that it is not of can be discovered outside, which affects the effectiveness of crime prevention would. In addition, a special operating circuit is required, with the choice places to receive these signals must be limited as a result. A special Receiver is also not required. At the moment, audio signal transmitters could be used not enforce because of the difficulties mentioned above, despite the fact that there is an essential need for the devices in many places.

The object of the invention is to create several wireless home intercom systems, which by using the present indoor pipe installation as an energy source and signal transmission circuit are operated and which by improving the Signal / interference ratio as a result of eliminating the effects of interference as a result other consumers who attend the line installation and supply power source are connected, have a noise-damping quality, which alone is good produces practical results without any adjustments on the part of the user.

The invention also provides an alarm transmitter for indicating abnormalities Conditions, which by using the already existing indoor pipe installation is operated as a power source and signal transmission circuit, being the same Signal transmission continues when the line installation connected to the device accidentally or deliberately separated as in normal operation.

The invention provides a compactly constructed sound sensor which by connecting it to a standard mains plug of an existing indoor pipe installation is connectable, with no special circuit is required for operation and wherein sound signals are indicated all around by the same line installation will.

The invention also provides a sound receiver, which by a usual mains plug of the line network can be connected is + and the above audio signals records.

The invention thus creates a sound signal transmission system Use of an already existing indoor pipe installation. The subject of the invention includes an alarm device, which is activated by the action of display means, which are provided at desired places, with an alarm signal through the present Line installation is transmitted, wel che as a signal transmission circuit and power source of the system is used. A sound sensor is actuated by Connection via a mains plug of the interior line installation and shows round appearing tones around. It is also a sound receiver for the above sound signals provided, which is connected to the indoor line installation via a different power plug connectable it. Finally, several house intercoms are provided, at which the disturbances occurring from other consumers in the line installation be reduced.

The invention is explained in more detail below with reference to the drawing. 1 shows an exemplary embodiment of an audio signal transmission system according to the invention in a block diagram, FIG. 2 shows an exemplary embodiment and a component of the inventive system forming sound sensor in perspective and broken away Depiction.

A low-voltage line installation 1 is for lamp consumers designed. In parallel with this network are an alarm device 2 with several display switches 3 in connection with this, a wireless home intercom 8 & 8 'with noise-dampening Quality for receiving the signals from the alarm transmitter 2, a compact sound sensor 4 together with a plug 6, which can be plugged into a conventional mains plug 5 is designed and a compact sound receiver 7 with a plug 6 'is provided, which is intended for insertion into a standard socket 5 'i: The Tenempfänger 7 can be replaced by the wireless intercom 8 & 8 '; by application Normal speech transmission is also possible for these two speech devices. Therefore users can normally communicate with each other using the wireless intercoms 8 & 8 'speak. In the meantime, actuated a desired number of display switches 3, which are connected in parallel to the alarm device 2 and in the form of door switches or Microswitches are installed on the rebates of doors and windows, the alarm device, when an intruder opens the door or window, which in turn gives alarm signals to the speech devices 8 & 8 'via the existing line installation 1 Therefore, the wireless intercoms 8 & 8 'can be used even when they are remote Squares are arranged to emit alarm signals, whereby some sort of special case is displayed in the place where the display switch is installed. When the wiring (W) between the display switches 3 and the alarm transmitter 2 accidentally or intentionally was interrupted, the alarm transmitter 2 continues to send out signals so that the Users can become aware of the incident by connecting through the intercoms 8 & 8 'occurs. If in the meantime the sound sensor 4 has a usual Plugs connected to the pipe installation can create tones around the facility 4 can be monitored by the sound receiver 7, which is connected to a different plug the line installation is connected. The sound receiver can in this case through the intercom 8 & 8 'must be replaced.

The following describes the wireless intercom which is a has interference-reducing quality. In a circuit 8, which is an embodiment of a wireless intercom according to the invention is a permanent magnetic Loudspeaker 81 is provided, which also serves as a microphone and has a preamplifier circuit 83 of the main amplifier via the transmission link of switch 82 is, the amplifier circuit 83 is connected via a circuit 86, which the high-frequency band via a transmission connection of a transmission / reception switch 84 amplified, the circuit 86 further connected to the transmit port of a transmit / receive switch 87 is connected. On the other hand, the reception port of the switch 84 is with a Circuit 85 connected to attenuate the high frequency band, its output terminal also connected to the receiving terminal of the switch 87. This switch 87 is connected to an output amplifier circuit 88, the output terminal of which at the receiving connection of the switch 82 and on the input side of a vibration and modulation circuit 89, the output connection of which is connected to the tfb transmission connection of the switch * 90 is located.

The receive port of switch 90 is in preamplifier 83 placed via a display circuit 91. Switches 82, 84, 87, 90 each switched to the end of transmission. After that will be Sounds given to the microphone / loudspeaker 81, its output after amplification reaches the circuit 86 to the desired extent on the part of the preamplifier 83, to emphasize the high frequency band to a favorable level. The output signal, whose high frequency band has been highlighted by circuit 86 is shown on the Output amplifier circuit 88 transferred to there to a desired amplitude to be reinforced. From the circuit 88, the signal also passes into the oscillation and modulation circuit 89 and from there, after nodulation into a wave of certain Frequencies, to the line installation 1 via the connection of the switch 90. Da whose high frequency band has been highlighted, the signal is transmitted to the receiver, while it is mixed with spurious signals transmitted by others to the line installation connected consumers are generated.

For receiving the signals transmitted by the wireless intercom the switches 82, 84, 87, 90 of the circuit are operated at the receiving end, when the transmitted signal in the display circuit 91 via the receiving terminal of the switch 90 arrives. The output of the circuit 91 also arrives in the circuit 85 to the high frequency band after amplification by the preamplifier circuit 83 to dampen.

During signal transmission in this circuit for the purpose of attenuation the high frequency band of the signal wave, which was previously emphasized, the high-frequency part of the interference has to be attenuated at the same time. However, since the high frequency band of the transmitted signal was previously raised, it becomes a desired one here Amplitude attenuated, while the high frequency part of the disturbance is attenuated to the same extent As a result, the signal-to-noise ratio increases so that the signal becomes clearer will.

The signal output variable obtained under these conditions is shown in of the output amplifier circuit 88 after amplifying the signal through the receiving terminal of the switch 87 run is. The amplified signal drives the Loudspeaker 81 via switch 82, allowing the transmitted Beep is heard clearly.

In general, there are disturbances that override clear speech communication prevent the support installation, mainly in the high frequency range before what results in a reduced signal / interference ratio and a clear understanding is difficult power.

According to the invention, the amplifier is provided with a circuit 86, to emphasize the high frequency band of the transmitted signal, and further with the Circuit 85 to attenuate it on reception, thereby reducing the line installation 1 transmitted signal is brought to a desired level in its high frequency band and wherein the receiver receives the above signal along with interference, which are generated by other consumers lying on the line installation 1; there is attenuation by the circuit 85 to a certain level, i.e. to a desired signal level since the high frequency band thereof is raised beforehand became. In the meantime, the interfering signal has a certain high frequency component attenuated to a lower level with the upper part decreased. as As a result, the signal-to-noise ratio can be improved, so that the signal is clearer can be maintained. This is one of the special advantages after the present donation Invention.

The alarm transmitter is explained below. According to the circuit diagram 2 and 3, in connection with a rectifier circuit 23, three are parallel to one another horizontal circuits provided; a circuit, with current of the GletchriGhterBchaltunz 23 is supplied from the input connection 21 via a main switch 22, the the output end of the circuit 23 consisting of a closed circuit from a b-contact 26b, which is always "closed?" and an alarm generator circuit 30; furthermore a closed circuit, with an a-contact 26a always "open" with an exam subject age of 25 is always "closed", an indicator switch 3 is normally "closed" and then open when incidents are indicated, further, the excitation coil 27 is in series with the rectifier circuit 23; and finally a circuit with a stop switch 24 which is normally "open" the switch is only for stopping the operation of the alarm generating circuit 30 is "closed", the excitation winding 27 to the circuits 30 and 23 is parallel.

On the other hand, the output side of the alarm generator 70 is at the input end 21 has a coupling capacitor and continues with the input end the indoor pipe installation 1 connected for signal transmission. To this Way, the same effect can be achieved if the rectifier circuit 23 is replaced by a normal DC power source, i.

by a battery or dry cell.

In operation, a user closes the main switch 22 and performs a certain voltage to the rectifier circuit 23 via the input end 21, which is connected to the lighting installation 1, whereby the alarm generator 30 via the contact 26b is actuated. Through the above-mentioned intercom, which the signals receives from the alarm generator 30, it is possible to check the alarm generator 30 itself. It is also possible to maintain the regularity of this circuit, by closing the stop switch 24 to energize the excitation coil 27 and to open the b-contact 26b, so that the alarm generator 30 from its power source can be switched off and stopped in terms of its function; simultaneously the a-contact 26a can be closed, whereby the current to the excitation coil 27 runs over the tester switch 25 and the display switch 3 and the coil 27 is energized to establish a self-holding circuit.

If now the display switch 3 after installation in the desired places If doors and windows are operated and opened, then the self-holding ability becomes the excitation coil 27 eliminated, whereby the b-contact 26b from the opened into the closed state and wherein the closed a-contact 26a returns to the open state, the same state of the Circuit is restored as if the aforementioned main switch 22 is turned on; here energy is also fed to the alarm generator 30, to operate it. There is a high-frequency signal that modulates the alarm tone was issued by the alarm generator 30 and to the line installation 1 via the input end 21 is guided, it is possible that the alarm signal at a remote Access to space by a normal receiver, for example a wireless one Intercom 8 & 8 '.

The wiring installation used as a signal transmission circuit 1 allows intercom 8 & 8 'with the same wiring to be connected to any Points can be applied.

The self-holding ability of the excitation coil 27 is then only immediate eliminated by an instantaneous power interruption, a number of the preceding explained operations can be achieved. So if the indicator switch 3 is currently switched on, the alarm generator 30 is actuated and transmits constantly signals. Instead of actuating the display switch 3, a random one is removed or beab.

Visual separation of the wire (W), which is connected to the display switch 3 connected, the self-holding state of the circuit and results in the preceding explained operations To stop the alarm transmission at any time after the If the display switch has been closed due to an display abnormality, this may be due to Closing the hold button 24 is done to allow the spool 27 to return reached the self-holding state.

Furthermore, this alarm device is checked daily for the purpose of confirmation its normal mode of operation of the test switch 25 opened, with a number of the operations mentioned above are performed so that the system can be easily checked can.

Other application examples for the subject matter of the invention result in connection with the following possibilities: A) Display physical Movements.

Example: intruder alarm, water level indicator and the like.

B) heat indicator.

Example: fire, abnormally high or low temperature, cold and cold Cold weather damage.

C) Gas gauge.

Example: harmful gases, smoke and explosion gas indicators.

D) Indication by infrared radiation.

Example: prevention of intrusion.

E) Level difference display.

Example: construction structures.

According to an application example according to the present invention one or more display switches 3 connected in parallel to each other at desired Places attached, the switches when displaying any special events take effect to cancel the latched state of the relay circuit, so that the alarm generator 30 can issue an alarm; the relay circuit is located normally in the self-holding state which is used to supply of power to the alarm generating circuit 30. The signals are received by the receiver, e.g. the wireless intercom 8 & 8 ', whereby this intercom is not in one piece but also in different places is installed, with connection through the existing line installation 1 In this case, the speech device 8 or 8 can also be used without any special adjustment be used. Further, when the display switch 3 once in the operating position goes smoothly, the alarm generator sets the transmission of the alarm until the stop button is pressed. The alarm generator can also be activated be used to transmit the signal when the wiring (W) in conjunction with the display switch 3 is accidentally or intentionally disconnected. The inventive The arrangement has a simple structure and accordingly low manufacturing costs.

The sound sensor is explained in more detail below.

Units 4 and 7 have a microphone 41 for sound display connected to an amplifier 42 which amplifies the output voltage of the microphone 41 The amplifier 42 is connected to an oscillation and modulation device 43 to a to generate and modulate desired high frequency voltage0 The output terminal of the oscillation and modulation device 43 rests on a plug 6 for plugging in into a normal socket 5 via a signal coupling circuit 49 for transmission of the high frequency voltage signal to the line installation 1.

With the plug 6 is also the input side of the rectifier circuit 45 connected, which supplies direct current to the oscillation and modulation device 43, to power this.

When a user connects the device 4 to a socket 5, so a tone displayed in front of the device 4 is fed into the amplifier 42 in the form of Output voltage of the microphone 41 out. Got there after reinforcement the signal in the next oscillation and modulation device 43, where a high frequency voltage, for example in the range of 100-200 KHz is generated and modulated, this Frequency is suitable for transmitting the signal through the line installation.

The modulated high frequency signal is fed into the signal coupling circuit 44 entered for transmission via the usual line installation. In this circuit 44 are the "L" and / or the "C" given so that there is sufficient reactance over the normal commercial power frequency, however a low reactance to the high frequency current.

The signals from the coupling circuit 44 become the usual wiring 1 via the plug 6 in connection with a normal socket.

The circuit 7 shows the recording circuit for recording and tapping of the above signals. If the user connects a plug 6 'of the receiver with a Socket 5 in connection with the line installation 1 connects via which Alarm signals for the purpose of listening to the sounds displayed by the microphone 41 are transmitted, signals come from the dcm connector 6 'via the signal coupling circuit 71 run into the display and amplifier circuit 72, with its output signal is transmitted to the speaker 43. This receiver can through the wireless Intercom devices 8 and 8 'can be replaced, whereby - if necessary - headphones instead of the Speaker 73 can be used.

Fig. 2 shows the sound display and transmission device, which in a housing 46 has a microphone 41, the surface of which is oriented so that Tones can be easily adjusted; a printed circuit board provided therein 47 takes an oscillation and modulation circuit, a rectifier circuit a for supplying the sliding current and a coupling circuit for carrying out one favorable high-frequency signal through the line installation. On the outside of the housing 46 is a plug 6 is provided, which with the input end of the above mentioned rectifier circuit 45 and with the output end of the coupling circuit 44 is connected, with the plug in a socket 5 of the line installation 1 can be inserted.

Claims (3)

Claims 1. A sound signal transmission system using an already existing one Indoor pipeline installation, characterized by multiple wireless intercoms (8) each of which has a noise suppression quality and with an amplifier is provided which has a circuit for amplifying a high frequency part of a transmitted Having audio signal, and each of which has a circuit for attenuating the high-frequency part a signal received therein by a microphone / speaker (81), which is indicated by the output variable of the amplifier, an oscillation and modulation circuit (89) and a display circuit, the system being controlled by the already existing indoor line installation as a signal transmission circuit Makes use and draws operating energy from it. 2. Sound signal transmission system using an already existing one Indoor line installation, characterized by an alarm transmitter for display, wherein a series circuit of a display element and a self-holding Relay circuit and an alarm generator circuit in parallel with a DC power source lie, and by a coupling circuit for transmitting the signal, the System from the already existing indoor line installation as a signal transmission circuit and power source makes use and the DC power source to the line installation (1) is connected. 3. Arrangement according to one of claims 1 or 2, characterized by a sound sensor; t4), with a plug (6) for a socket with the wiring of the sonic sensor and provided on the outer surface of the housing (46) is, which includes the sound switch, sXotei inside the housing a microphone (41) for displaying sound and a circuit are provided, which the amplifying Signal modulated into a high frequency signal, the system being different from the existing one Interior manager installation as a signal transmission circuit and power source makes use of and wherein the direct current source is connected to the line installation (1) is connected. 4, system according to one of claims 2, characterized by a Sound receiver in which a signal coupling circuit 1 is a display and amplifier circuit as well as a loudspeaker with a housing that contains the sound receiver, one adapted to a socket of the already existing line installation Connector is provided on the outer surface of the housing, the system of the existing indoor line installation as a signal transmission circuit and makes use of it as a source of energy.