Mobile X-ray Imaging Device Sleep Mode Power Management
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Solution Overview
Problem
Conventional mobile X-ray imaging devices lose control circuit power in sleep mode, requiring operator intervention for restart and making it difficult to determine the device's status, which reduces battery power efficiency and operator confusion.
Innovation Solution
A mobile X-ray imaging device with a startup switch, switchgear, startup circuit, control circuit, mode transition relay, and startup circuit connection relay that allows detection of operation switch inputs during sleep mode to restore to normal startup mode and display the sleep mode status with low power consumption using a timer IC.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the control circuit loses power in sleep mode to reduce battery consumption, then battery power efficiency is improved, but the device cannot detect operation switch inputs and requires operator intervention for restart
Solution Approach 1:
The power supply system is segmented into two independent paths: one for the control circuit and another for the startup circuit. The startup circuit remains powered during sleep mode to detect operation switch inputs, while the control circuit is powered down to reduce battery consumption. This segmentation allows each component to operate independently according to its power requirements.
Solution Approach 2:
The startup circuit acts as an intermediary between the powered-down control circuit and the operation switches. It detects inputs from operation switches during sleep mode and generates wake-up signals to restore power to the control circuit, enabling automatic restart without operator intervention.
2Use of energy by moving object
If the control circuit loses power in sleep mode to reduce battery consumption, then battery power efficiency is improved, but the operator cannot determine the device's status
Solution Approach 1:
The startup circuit performs self-service by maintaining its own power supply during sleep mode to monitor operation switch inputs and generate wake-up signals. This autonomous function allows the device to automatically transition from sleep mode without requiring operator intervention or knowledge of the device's power state.
3Ease of operation
If the startup circuit remains powered during sleep mode to detect operation inputs, then ease of operation is improved, but power consumption increases
Solution Approach 1:
Instead of powering the entire control circuit during sleep mode, the system applies partial action by only powering the startup circuit with minimal power sufficient for detecting operation inputs. This selective power application achieves the wake-up function while minimizing overall power consumption.
Data Source
AI summary
Provided inside a trolley are: a battery (1); a switchgear (2) arranged in a main path connecting a load (100) to the battery (1); a control circuit (7) controlling the load (100) and connected to the main path; a startup switch (4) opened and closed by operation of a key (29); and a startup circuit (5) that is connected to the battery (1) and activates the switchgear (2). Electric power supplied from the battery (1) to the startup circuit (5) and the control circuit (7) are respectively converted by a startup DC-DC converter (3) and a control DC-DC converter (6) to a voltage that activates the startup circuit (5) and the control circuit (7). When the device is in a sleep mode, electric power supply is received from the startup DC-DC converter (3) and a startup circuit connection relay (55) detects input from an operation switch (30) and operates.