Wireless Security Sensor Intermittent Signal Generation
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Solution Overview
Problem
Conventional security sensor systems with wireless transmitters fail to continuously transmit abnormality detection signals during mode switches, leading to inability to recognize persistent abnormal conditions in receivers.
Innovation Solution
Incorporating an intermitted signal generating section in the controller to intermittently transmit sensor signals, including abnormality detection signals, from the wireless transmitter to the receiver, ensuring persistent signal recognition even with general-purpose transmitters capable of one-pulse outputs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a general-purpose wireless transmitter capable of one-pulse output is used, then device complexity and cost are reduced, but the ability to recognize persistent abnormal conditions is lost
Solution Approach 1:
The controller generates an intermitted sensor signal before transmission to ensure that the signal format is suitable for one-pulse transmitters. By preparing the signal in advance with appropriate timing characteristics, the system maintains abnormality detection capability without requiring complex continuous transmission hardware.
Solution Approach 2:
The controller acts as an intermediary between the sensor and the wireless transmitter. It processes the sensor signal to create an intermitted output that bridges the gap between continuous abnormality conditions and the pulsed transmission capability of simple transmitters, enabling reliable detection with minimal complexity.
2Reliability
If continuous signal transmission is implemented during non-security mode, then persistent abnormal conditions can be recognized, but power consumption increases
Solution Approach 1:
The system uses periodic (intermitted) signal transmission instead of continuous transmission. The controller generates sensor signals at specific intervals, which reduces power consumption while still enabling the receiver to detect and recognize persistent abnormal conditions through the patterned signal presence.
Solution Approach 2:
The intermitted signal generation maintains the essential continuity of abnormality detection functionality. By strategically timing the intermittent signals, the system ensures that useful detection action continues effectively throughout operation without requiring constant energy expenditure.
3Use of energy by moving object
If one-pulse signal transmission is used during non-security mode, then power consumption is reduced, but the receiver cannot recognize persistent abnormal conditions during security mode
Solution Approach 1:
The controller prepares the signal in advance by generating it with intermitted characteristics that encode persistence information. This preliminary signal preparation ensures that when the receiver gets the signal, the information about persistent abnormal conditions is already embedded in the transmission pattern, eliminating information loss.
Solution Approach 2:
The system establishes a feedback loop where the controller monitors the sensor signal and adjusts the intermitted output accordingly. This feedback mechanism ensures that persistent abnormal conditions continue to generate signals appropriately, allowing the receiver to recognize their persistence without requiring continuous high-power transmission.
Data Source
AI summary
Since a sensor signal intermitted on the basis of a sensor signal including an abnormality detection signal, detected as a result of a persistence of an abnormal condition of a security sensor, is generated and an intermitted output signal in dependence on an intermitted sensor signal input is transmitted from a wireless transmitter 17 to a receiver 18, a condition in which the intermitted output signal can be transmitted from the wireless transmitter 17 to the receiver 18 can be retained even though the wireless transmitter 17 is of a type capable of transmitting an output signal in the form of, for example, one pulse on the basis of the signal input, and it is therefore possible for the side of the receiver 18 to recognize assuredly the persistence of the abnormal condition.