Terminal Device Battery Shutdown Detection and Telemetry

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Solution Overview

Problem

Existing telemetry systems cannot accurately determine the shutdown state of a terminal device's battery, specifically distinguishing between power switch operation and battery detachment.

Innovation Solution

A terminal device equipped with a shutdown detection unit that transmits battery state information, including power switch operation and battery detachment status, to a biological information display device, which uses this information to display the shutdown cause and determine the battery's remaining charge amount, combining it with radio wave state detection to accurately identify battery shutdown states.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the transmitter stops transmission when battery shuts down, then power consumption is reduced, but the receiving device cannot determine whether the shutdown is due to power switch operation or battery detachment

Engineering Contradiction:

Improvedetermination accuracy of battery shutdown stateVSAvoidinformation about shutdown cause

Core Design Contradiction:

ReliabilityVSLoss of information

Solution Approach 1:

The transmitter sends battery state information including shutdown cause (power switch operation or battery detachment) before actually stopping transmission. This preliminary action allows the receiving device to know the shutdown cause in advance, enabling accurate determination of the battery shutdown state without losing information about why the transmission stopped.

Inventive Principle:

Principle #10Preliminary action

2Measurement precision

If the transmitter continuously transmits battery state information, then the receiving device can always monitor battery status, but power consumption increases

Engineering Contradiction:

Improvemonitoring accuracy of battery stateVSAvoidpower consumption of transmitter

Core Design Contradiction:

Measurement precisionVSUse of energy by moving object

Solution Approach 1:

The transmitter transmits battery state information periodically or at specific events (battery attachment/detachment, power switch operation) rather than continuously. This periodic transmission maintains monitoring accuracy by providing updates at key moments while significantly reducing power consumption compared to continuous transmission.

Inventive Principle:

Principle #19Periodic action

3Loss of information

If the system transmits detailed battery state information, then the receiving device can accurately identify shutdown causes, but communication bandwidth is consumed

Engineering Contradiction:

Improveinformation completeness about battery stateVSAvoidcommunication data volume

Core Design Contradiction:

Loss of informationVSQuantity of substance

Solution Approach 1:

The system extracts only the essential battery state information (shutdown cause: power switch operation or battery detachment) and transmits it separately from other biological information. This extraction of key information ensures complete knowledge of battery status while minimizing communication data volume by sending only the most critical data.

Inventive Principle:

Principle #2Taking out (Extraction)

Data Source

PatentEP2921101B1Terminal device and telemetry system

Publication Date: 2019.07.31 NIHON KOHDEN CORP

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AI summary

A terminal device in which a transmitter transmits biological information and battery state information to a biological information display device, includes a shutdown detection unit that detects a shutdown state of a battery, and a transmission control unit that, when the shutdown detection unit detects the battery shutdown state, causes the transmitter to transmit the battery state information indicative of shutdown.