Vehicle Data Readout Device Power Saving via Voltage Threshold
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Solution Overview
Problem
Existing vehicle data readout devices consume significant power when connected to a vehicle for extended periods, even when the vehicle is not activated, due to continuous power supply from the vehicle's power source.
Innovation Solution
A vehicle data readout device with a voltage monitoring circuit and changeover switch that initiates data readout only when the in-vehicle network signal transmission begins, reducing power consumption by maintaining a power-saving mode until signal transmission is initiated and canceling it when no response is received from electronic control units.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If the vehicle data readout device remains connected to the vehicle for extended periods to enable data readout, then data availability is improved, but power consumption increases significantly
Solution Approach 1:
The patent applies dynamics by making the device state changeable between active and power-saving modes. The device dynamically transitions from a fully operational state to a low-power state when no data readout operations are正在进行, and back to active state when communication signals are detected. This dynamic state adjustment resolves the contradiction by allowing the device to remain connected for extended periods while consuming minimal power during idle times.
Solution Approach 2:
The patent changes the operational parameters of the device based on detected conditions. When the port voltage exceeds the threshold value indicating signal transmission, the device changes from power-saving mode to active mode. This parameter-based state transition allows the device to maintain connectivity without continuous high power consumption, resolving the contradiction between availability duration and energy usage.
2Speed
If the device activates continuously to ensure immediate data readout capability, then response speed is improved, but power consumption increases
Solution Approach 1:
The patent implements periodic monitoring of the port voltage to detect signal transmission. Instead of continuous full operation, the device periodically checks for communication signals and activates only when needed. This periodic action maintains the ability to respond quickly to data readout requests while avoiding continuous power consumption, thus resolving the contradiction between response speed and energy usage.
3Measurement precision
If the device monitors communication lines continuously to detect signal transmission, then detection accuracy is improved, but power consumption increases
Solution Approach 1:
The patent uses the existing communication line signals to trigger device activation. The device monitors for voltage changes on the communication lines that indicate signal transmission, and uses these self-generated signals to activate the device. This self-service approach allows accurate detection of when data readout is needed without requiring continuous active monitoring, resolving the contradiction between detection accuracy and power consumption.
Data Source
AI summary
Provided are a vehicle data readout device and a vehicle data readout method with which it is possible to reduce power consumption in a state in which a vehicle has not been activated, even if the vehicle data readout device, which receives power from an in-vehicle power source, remains connected to the vehicle. Taking as a trigger a port voltage (Vp) of a readout communication line exceeding a voltage threshold (THv), a vehicle data readout device switches a change-over switch from off to on, to generate a pull-up state by means of a pull-up resistor, and initiates a read-out of operation parameter data (Dp) by a computer.