GB2553153A

GB2553153A - Improved door entry intercom

Info

Publication number: GB2553153A
Application number: GB1615577.2A
Authority: GB
Inventors: Michael Matthew
Original assignee: Individual
Current assignee: Individual
Priority date: 2016-08-18
Filing date: 2016-09-13
Publication date: 2018-02-28
Anticipated expiration: 2036-09-13
Also published as: GB2553153B; GB201614307D0; GB201615577D0

Abstract

A door entry system, preferably for small buildings with less than ten transceivers, that sends transmissions along power lines preferably using encrypted digital processing. The locks may be classed as transceivers, opening only on secure signals, one at a time. Preferably more than two transceivers can be activated during multi-way conversations, all conversations may remain private without being overheard. The system may be resistant to accidental entry button activation, and door entry activation is preferably only achieved when the corresponding bell is pressed. The system may be resistant against voice tapping and recording, preferably sending digitally converted voice signals.

Description

(56) Documents Cited:

US 5734682 A US 20160381321 A1

H04N7/18 (2006.01)

US 4506252 A US 20150009283 A1 (71) Applicant(s):

Matthew Michael

Gresham Gardens, LONDON, NW11 8PA, United Kingdom (58) Field of Search:

Other: EPODOC, WPI, Patent Fulltext (72) Inventor(s):

Matthew Michael (74) Agent and/or Address for Service:

Matthew Michael

Gresham Gardens, LONDON, NW11 8PA, United Kingdom (54) Title of the Invention: Improved door entry intercom Abstract Title: Door entry system (57) A door entry system, preferably for small buildings with less than ten transceivers, that sends transmissions along power lines preferably using encrypted digital processing. The locks may be classed as transceivers, opening only on secure signals, one at a time. Preferably more than two transceivers can be activated during multi-way conversations, all conversations may remain private without being overheard. The system may be resistant to accidental entry button activation, and door entry activation is preferably only achieved when the corresponding bell is pressed. The system may be resistant against voice tapping and recording, preferably sending digitally converted voice signals.

Improved Door Entry Intercom

Traditional door entry systems provide an efficient way of security screening visitors to a building or location to identify them and determine the nature of their visit. On the face of it to the end user or layman this seems very useful and fulfils the need to make it easier to screen callers however there are quite a few problems and pitfalls to the original system.

Analogue voice signals are usually amplified and sent over an open network of wires to more than one location. For example if there is a block of flats there will be one transceiver at the entrance and each flat will have its own transceiver to reciprocate and open any relevant doors if needed. If two people are talking over the door entry system and another transceiver is activated, the third party can listen in to the call breaching privacy and security.

Further to the above the voice network can be tapped and recorded by unauthorised persons

Traditional systems have a key button on the transceivers, not constituted as main transceiver/s, that when pressed will open the building entry door. This button also uses an open network and is independent of any caller notification buttons being pressed. Therefore if pressed by accident it could allow unwanted access to the building; a major security breach.

The wires for the entry button keys usually run through and junction behind the main entry panel at the front of the building. Many panels have one screw securing them and others have more. Knowledgeable and clever vagabonds and devious callers can remove the panel and short wires together gaining them access through the entry door. This can be done in under a minute in some cases and can be detrimental to the security of the building and constitutes another major security breach.

There is also the remote possibility of caller notification bell/buzzers of being activated within a building by deleterious neighbours by shorting wires together. This would be very annoying especially if there was no caller at the front door.

Furthermore this could constitute a security breach.

Traditional systems normally have many connections requiring multi strand cable or other multi wires making it complicated and cumbersome to install and wire up. Some systems even use around four to six strands per communicator (all except the main communicator).

Another problem with these systems is the analogue voice signals which can be prone to interference and distortion or cutting out over long distances.

My invention revolutionises door entry systems. Digitised voice signals and commands are sent to the transceivers over the power lines using my new invented modulation; this allows very easy installation and a very secure system. Therefore the installer only has to hook up the power lines (two wire strands) and this does away with any complicated wiring diagrams. The signals or commands can be encrypted or one time encrypted for example using a time stamp for greater security.

Powered locks will contain on board processing and only open on the right command so they will not open on any type of power line wire connection direct or indirect making them much more secure against vagabond tampering.

Transceivers will not send open commands for door entry unless the relevant caller notification button has been pressed.

Caller notification bells/buzzers will only activate when the correct command is sent therefore securing against tampering and deleterious shorting of wires to active the bells/buzzers.

Only the relevant transceiver to the call notification button will activate.

Only the relevant transceiver to the call notification button will activate and relay the voice signals so conversations will remain secure and private. Multi-Way conversations will also be possible but other parties will have to be allowed access and thus extra transceiver activation will ensue. This could also be indicated to ensure users are aware that a multi-way conversation is under way. Digital encoded/encrypted signal will also prevent signal tapping or recording.

Digital encoded signals ensure clean undistorted signals will be received that can be sent over long distances

Installers will be able to install this entry system very quickly accurately and easily and with only two wire strands joining each device it will be relatively full proof to install with no circuit diagrams to understand and no complications.

In an other iteration my invention will incorporate a separate communication line making it only three wire strands to hook up.

In an other iteration my invention will incorporate a separate communication line for commands and a separate communication line for voice signals making it only four wire strands to hook up.

In an other iteration my invention will incorporate a separate communication line for commands and two communication lines for voice signals making it only five wire strands to hook up. (Also it could use two for commands and one for voice signals or even two for each)

A detailed description follows:

This invention provides a superior door entry system, where the units/systems communicate securely and it is much easier to install saving the installer time and ultimately money.

The entry system comprises of several systems which make up the whole entry unit.

There is a power unit which created as such to allow information to be sent along the power lines.

There is the main transceiver/s of which there needs to be a minimum of one. This incorporates the bell unit consisting of one or several bell button/s or a bell selection unit. This system also includes the main voice and command transmission/receiver unit that can send and receive information over power lines.

The system also comprises of one or many communication transceivers not constituted as main that users use to communicate with the main transceiver (eg like the internal communicator telephones that traditional entry sets have that can be installed in individual flats, but upgraded.). These will be referred to as communication transceivers in this document. They include a bell or buzzer to alert of a specific bell selection/button being pressed and relevant door open button/s to open any entry doors as needed. These transceivers also consist of voice and command transmission/receiver units that can send and receive information over power lines. Hence also the buzzer/bell will only activate when the correct command has been received from a main transceiver.

Multi way communication is achieved when communication transceivers are set to allow multi way communication and further specific bell selection/button is pressed. An indicator light can display when multi way communication is under way.

There is also door lock transceivers that consist of command transmission sender receiver units that can send and receive information over the power lines and will only open the door/s when specified to by the communication transceivers (obviously the main transceiver/s could be excluded from issuing such a commands).

Communication transceivers can only issue any specified command when activated by it's specific call option and an optional further timeframe. The open commands can be encrypted and when accepted by this unit, it can further allow for a specific time frame for the door to be opened giving the people entering a specific time frame in which to open the door after which it will be locked again.

Lock transceivers can also be code secured to a particular entry set and this reflects in the command and data received.

The entry unit workings are further specified here as one iteration of several that can be achieved:

The power unit consists of a traditional low voltage dc supply either switch mode or transformer rectified which is further modified where the positive output is fed through an inductor. A damper diode is set in parallel to the inductor to stop spurious ac signals.

The positive output from the modified power unit can constitute the positive dc power line and also communication line for voice and command signals. The negative or ground line from the traditional supply will remain such.

Transceivers create their own stable supply from the power communication line by rectify and smoothing the positive input from the dc power line. Another output level is set using a regulator as normal to produce voltage necessary to run any specific processing.

Transmission is sent through my new modulation technique called Binary Wink Modulation. Here negative output pulses indicate state information. No period pulses indicate waiting or null transmission. A first bit pulse and no output pulse in the second bit pulse location indicates a null. A first and second bit pulse indicates a one. Successive period bits indicate further binary communication which in total constitutes the data packet. Periods are aligned by the processors on receipt of a first bit pulses following a null transmission. Periods are the defined time in which a packet of signals are sent.

Transmission is sent along the +ve dc power line by a switching fet set across the power lines. The gate to the fet is activated by a processor.

Signal detection is achieved using a simple pnp switching transistor where the stable transceiver supply is set against the power communication line as the base input. Output from such is fed to a processor input.

Voice transmission is free flowing Analogue to Digital Converted microphone amplified pick up, stored and sent in packets with checksums. Transmission packets follow null periods to wait for reciprocal packets and depending on the number of reciprocal transceivers involved in conversation each transceiver will wait for the correct amount of packets. Voice transmissions are preceded by a null to indicate such.

If checksums and packets do not corroborate then handshake commands will be sent to tell the sender to resend the packet.

Voice output is produced by removing the preceding nulls and checksums from received voice data, then Digital to Analogue converting the data. The resulting analogue voice signal is then and amplified and outputted to a voice outputting transducer.

Command transmissions are preceded by a one. Command transmissions and/or accompanying data are sent after null periods as per the transceiver turn system described above. Commands are usually handshaked. Checksums can be used for command transmissions also.

All transmission data can be encrypted or one time encrypted before transmission.

Processors handle all communication, command and voice structures and deal with the intricacies of the transceivers eg: limiting the number of responsive transceivers during a two or multi way conversation and eg: not allowing door opening unless the transceiver corresponding to the call notification button is active.

Entry locks are also classed as transceivers with my system and will only open (ie activate the required solenoids) when the correct command is received. On board processors ensure correct working of the entry lock transceivers.

,7

In other iterations transmission could be sent along separate lines either a separate communication line or 1,2 or more lines for command communication and/or 1,2 or more lines for voice communication. In such situations transmission could be sent straight from processor output/s or through power line/s and Binary Wink Modulation. Such iterations produce three, four, five, and more wire hook up systems.

Claims

1. A Door Entry System that can send the transmissions along power lines.

2. A Door Entry System that can be connected up using two wires, three wires, four wires or five wires eg: a two stranded cable, a three stranded cable, a four stranded cable and a five stranded cable .

3. A Door Entry System that uses Digital Processing

4. A Door Entry System for small building with less than ten transceivers that uses Digital Processing

5. A Door Entry System that uses Binary Wink Modulation

6. A Door Entry System that sends and receives encrypted signals.

7. A Door Entry System that sends and receives one time encrypted signals.

8. A Door Entry System that uses commands to activate different actions.

9. A Door Entry System where the commands that it actuates use command handshaking.

10. A Door Entry System resistant to tampering

11. A Door Entry System where the entry locks can be classed as transceivers.

12. A Door Entry System where the entry locks will only open on a secure signal.

13. A Door Entry System where the entry locks will only open on a secure command.

14. A Door Entry System where the entry locks will only open on an encrypted signal.

15. A Door Entry System where the entry locks will only open on a one time encrypted signal.

16. A Door Entry System where the entry locks will not open on voltage highs or lows.

17. A Door Entry System where shorted hook up wiring will not open the entry locks.

18. A Door Entry System where hook up wiring or terminals shorted to a power line will not open the entry locks.

19. A Door Entry System where the entry locks will only work with a specific entry set ie they are command secured.

20. A Door Entry System where the caller notification bells/buzzers will only sound on a secure signal.

21. A Door Entry System where the caller notification bells/buzzers will only sound on a secure command.

22. A Door Entry System where the caller notification bells/buzzers will only sound on an encrypted or one time encrypted signal.

23. A Door Entry System where shorted, or power line shorted, hook up wiring will not sound the caller notification bells/buzzers.

24. A Door Entry System where conversations remain private.

25. A Door Entry System where conversations can not be overheard.

26. A Door Entry System which allows multi way conversations.

27. A Door Entry System which has an indicator (eg an led light on the transceivers) to alert the user a multi way conversation is under way.

28. A Door Entry System which allows multi way conversations when other parties have to be allowed access to the conversation.

29. A Door Entry System in which more than two transceivers can be activated especially during multi way conversations when other parties have to be allowed access to the conversation.

30. A Door Entry System where activated transceivers will wait their turn to communicate.

31. A Door Entry System where two way conversations will only be specific to the receiving party corresponding to which bell is pressed

32. A Door Entry System where two way conversations can only be achieved when the corresponding transceiver/receiver is activated.

33. A Door Entry System that is easy to install without complicated circuit diagrams.

34. A Door Entry System resistant to accidental entry button activation.

35. A Door Entry System where door entry activation can only be achieved when the corresponding bell is pressed

36. A Door Entry System where door entry activation can only be achieved when the corresponding transceiver/receiver is activated.

37. A Door Entry System resistant against voice tapping

38. A Door Entry System resistant against voice tapping and recording

39. A Door Entry System that uses checksums

40. A Door Entry System that sends Digitally Converted Voice Signals

41. A Door Entry System for small building with less than ten transceivers that sends Digitally Converted Voice Signals

42. A Door Entry System that sends Digital Signals such that the signals will be received in clarity over long distances

43. A Door Entry System that sends Digital Signals such that the signals are less prone to distortion and interference

44. A Door Entry System where the receiving transceivers will only activate when the relevant bell that relates to it has been pressed

I

Intellectual

Property

Office

Application No: GB1615577.2 Examiner: Mr Ralph Plowman