Daisy Chain Device Addressing via Signal Frequency Division
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Solution Overview
Problem
Configuring addresses for heterogeneous devices in a daisy chain communication configuration is complex, especially when devices need to be replaced or upgraded, as existing methods lack efficiency in determining and sharing addresses across the network.
Innovation Solution
A method involving a master device that generates a signal with a pre-determined base frequency, which is propagated through the daisy chain, allowing each device to determine its address based on the input frequency, and a processing unit that uses an address lookup table to configure communication interfaces, enabling efficient address determination and data exchange.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual address configuration is used for each device in the daisy chain, then address assignment can be done, but the configuration process becomes complicated and time-consuming
Solution Approach 1:
Each device in the daisy chain automatically determines its own address by detecting the input signal frequency from the preceding device. The processing unit measures the input frequency and configures the address without external intervention, allowing the system to self-configure when devices are added or replaced.
Solution Approach 2:
The address of each device is determined by changing the frequency parameter of the signal passed through the daisy chain. Each device detects the input frequency and uses it to set its address, creating a direct relationship between signal frequency and device address that simplifies configuration.
2Adaptability or versatility
If addresses are manually configured for heterogeneous devices, then device identification is possible, but the process lacks efficiency when devices need to be replaced or upgraded
Solution Approach 1:
When a device is replaced or added to the daisy chain, it automatically detects the signal frequency from the preceding device and configures its own address. This eliminates the need for manual reconfiguration and maintains high productivity during device replacement operations.
Solution Approach 2:
The address configuration system is made dynamic by allowing automatic address determination based on real-time signal frequency detection. This enables the system to adapt to device replacements and reconfigurations without requiring static manual configuration procedures.
3Reliability
If a daisy chain configuration is used for communication, then device connectivity is established, but address determination and sharing becomes complicated
Solution Approach 1:
The address determination complexity is reduced by using signal frequency as the basis for address assignment. Each device simply measures the input frequency and configures its address accordingly, transforming a complex addressing problem into a simple frequency measurement task.
Solution Approach 2:
The system uses feedback from the signal frequency to automatically determine addresses. The frequency of the signal passing through the daisy chain provides continuous feedback that each device uses to configure its address, eliminating the need for complex external address management.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Simplifies the address configuration process, allowing for automatic detection of device changes and efficient data exchange within the daisy chain communication configuration, enhancing the scalability and reliability of environment control systems.
Implementation Method 1
The device comprises a frequency divider for generating an output signal having an output frequency half of the input frequency of the received signal
Data Source
AI summary
A master device, daisy-chained devices, and a method for configuring the daisy-chained devices are provided. The master device generates a signal having a pre-determined base frequency, and outputs the signal generated to a first device in the daisy chain communication configuration. Each daisy-chained device receives an input signal, having an input frequency, from a previous daisy-chained device. Each daisy-chained device generates an output signal having an output frequency different to and based on the input frequency of the received signal, and outputs the output signal to a following daisy-chained device. Each daisy-chained device further determines an address of a communication interface, for exchanging data with the master device, based on the input frequency of the received signal. For example, the output frequency of the output signal is half the input frequency of the received signal.