Two-wire communication apparatus and method
a communication apparatus and two-wire technology, applied in the direction of instruments, electric controllers, ignition automatic control, etc., can solve the problems of inconvenient automatic configuration, limited transmission distance and data transmission integrity, and difficult to adapt to high-frequency encoding systems, etc., to facilitate expansion and facilitate automatic configuration
Inactive Publication Date: 2010-10-21
DEHART SCOTT ALAN +1
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- Application Information
AI Technical Summary
Benefits of technology
"This patent describes a way to send power and communication signals to remote devices using a single pair of wires. This is useful for controlling things like heating and air conditioning systems, sprinkler control systems, security and lighting controls, and industrial automation controls. The invention also introduces a new way to automatically discover and configure new devices in a two-wire system, making it easier to add new devices to the network. Overall, this invention simplifies the process of designing and installing control and data gathering systems."
Problems solved by technology
These systems generally tend to require more complex encoding and decoding hardware.
If the proper techniques are not used, transmission distances and data transmission integrity can be limited.
This type of lay out is not well suited to high frequency encoding systems where transmission line characteristics are important.
However, with this arrangement, the modulators and demodulators have been required, the system formation has been complicated and the cost reduction has not been able to be attained.” This technique is widely used in both AC and DC two-wire systems.
Systems with high frequency carriers require special care in impedance matching and layout and are limited in distance.
They also require a certain level of cost and complexity.
Demeyer does not teach the ability to use this capability to automatically configure the system.
Method used
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[0025]FIG. 1 is a block diagram showing a typical embodiment the preferred embodiment of the present invention. Referring to FIG. 1, a controlling computer 100 is connected to a base unit 200 by a private interface 103. The base unit 200 is capable of communicating with a variety of remote units over a two-wire bus 140. Illustrative remote units include the moisture sensor 105, valve coders 110, 110′, and 115, a pump actuator 120, a pressure sensor monitor 125, and a flow sensor monitor 130. The base units 200 and remote units are electrically connected with the two-wire bus 140. The two-wire bus 140 can be realized in a number of different ways, including a single pair of wires interconnecting each unit, or, alternatively, utilizing an existing wire with single ground and multiple power lines. In a typical deployment, remote units connected to the two-wire bus 140 function as controllers and have an additional, independent interface to a device they control. In FIG. 1, pump 145 is ...
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A method and apparatus for operating and actuating remote devices using a single pair of wires together with communication and networking protocols necessary for operational control of the remote devices and data gathering activities from the remote devices. The invention leverages the use of existing wiring and is particularly useful in heating and air conditioning systems, sprinkler control systems, security systems, lighting control systems, industrial automation control systems and similar environments.
Description
CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application claims priority of provision patent application No. 60,326,074 filed Sept. 28, 2001, and is a continuation of nonprovisional application Ser. No. 10 / 256,485 filed Sept. 26, 2002.BACKGROUND OF THE INVENTION[0002]Numerous systems exist where a signal of some type is superimposed on a power signal. In these systems, the communication information is separated from the power signal in the frequency spectrum such that through proper frequency separation techniques and with proper encoding and decoding techniques the information can be extracted from the power signal. These systems can perform very well and meet many design needs. Systems comprising a high frequency carrier, upon which is impressed the encoded information, requires a tightly specified and controlled transmission medium such that the high frequency carrier is not lost and signal integrity is maintained. These systems generally tend to require more complex encodin...
Claims
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IPC IPC(8): G05B11/01H04L29/06H04L29/08H04L29/12
CPCH04L29/06H04L29/12009H04L67/12H04L61/20H04L29/12207Y04S40/18H04L61/50H04L61/00H04L9/40
Inventor DEHART, SCOTT ALANHICKENLOOPER, FRANKLIN TIMOTHY
Owner DEHART SCOTT ALAN