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JP-2026074689-A - Automatic inspection device

JP2026074689AJP 2026074689 AJP2026074689 AJP 2026074689AJP-2026074689-A

Abstract

[Problem] To provide an automated inspection device that can inspect an ECU by simulating abnormal conditions such as disconnections between the ECU and the vehicle load, as well as short circuits and power supply system failures. [Solution] An automatic inspection device comprising a simulated load that simulates a controlled object, an electronic load that consumes power supplied from the ECU and power supply system, a simulated circuit inserted between the ECU, the simulated load, the power supply system, and the electronic load, and an inspection unit that inspects the operation of the ECU in each simulated state set by the simulated circuit, wherein the simulated circuit simulates a break in the simulated load by interrupting the connection between the power supply system and the electronic load, the connection between the ECU and the electronic load, and the connection between the ECU and the simulated load, and enables the connection between the ECU and the electronic load, and simulates a short circuit in the simulated load, and enables the connection between the ECU and the simulated load and the connection between the power supply system and the electronic load, and interrupts the connection between the ECU and the electronic load, thereby simulating a failure in the power supply system. [Selection Diagram] Figure 1

Inventors

  • 津田 直樹

Assignees

  • トヨタ自動車株式会社

Dates

Publication Date
20260507
Application Date
20241021

Claims (3)

  1. An automated inspection device that automatically performs inspections of the power control ECU, A simulated load that simulates the controlled object, The power control ECU and an electronic load that consumes power supplied from a power system connected to the power control ECU in a manner that allows power to be supplied to the power control ECU, A simulated circuit is inserted between the power control ECU, the simulated load, the power supply system, and the electronic load. The system includes an inspection unit that inspects the operation of the power control ECU in each simulated state set by the simulated circuit, The aforementioned simulated circuit is By disconnecting the connection between the power supply system and the electronic load, the connection between the power control ECU and the electronic load, and the connection between the power control ECU and the simulated load, the disconnection state of the simulated load is simulated. By disconnecting the connection between the power supply system and the electronic load, and the connection between the power supply control ECU and the simulated load, and by restoring the connection between the power supply control ECU and the electronic load, a short-circuit state of the simulated load is simulated. The power supply control ECU and the simulated load are connected, and the power supply system and the electronic load are connected, and the power supply control ECU and the electronic load are disconnected, thereby simulating a failure state in the power supply system. Automatic inspection device.
  2. There are multiple simulated loads as described above. The simulation circuit individually switches the connection state between the power control ECU and each of the plurality of simulated loads based on a pattern corresponding to a desired test state. The automatic inspection apparatus according to claim 1.
  3. The simulated circuit simulates transient state changes leading to a short circuit in the simulated load and a failure in the power supply system by gradually increasing the amount of power consumed by the electronic load. The automatic inspection apparatus according to claim 1 or 2.

Description

This disclosure relates to an automated inspection device for automatically inspecting power control ECUs installed in vehicles. Patent Document 1 discloses an automated inspection device that can simulate a state in which the wiring connecting various electronic control units (ECUs) to loads mounted on a vehicle (engine, motor, battery, etc.) is broken, and automatically inspect the operation of the electronic control unit in that simulated broken state. Japanese Patent Publication No. 2008-261793 A schematic diagram of a system configuration including an automated inspection apparatus and its peripheral parts according to one embodiment of the present disclosure.This diagram shows the connection status of each switch in the simulated circuit in a simulated disconnection state.This diagram shows the connection status of each switch in the simulated circuit under a short-circuit simulation.This diagram shows the connection status of each switch in the simulated circuit in power system failure simulation state 1.This diagram shows the connection status of each switch in the simulated circuit in power system failure simulation state 2. The automated inspection device of this disclosure inspects the electronic control unit by suitably controlling a characteristic simulated circuit and an electronic load, thereby simulating abnormal conditions such as disconnections in the connection lines between the electronic control unit and the vehicle load, as well as short circuits in the connection lines and power supply system failures. The embodiments of this disclosure will be described in detail below with reference to the drawings. <Implementation> [composition] Figure 1 is a schematic diagram of a system configuration example including an automatic inspection device 200 and its surrounding parts according to one embodiment of the present disclosure. The system illustrated in Figure 1 comprises a high-voltage battery 110, a DC-DC converter 120, an auxiliary battery 130, a power control ECU 140, and an automatic inspection device 200. The high-voltage battery 110, DC-DC converter 120, auxiliary battery 130, and power control ECU 140 are mounted in a vehicle. The high-voltage battery 110 is a rechargeable secondary battery, such as a lithium-ion battery. This high-voltage battery 110 can supply its stored power to the power control ECU 140 via the DCDC converter 120. The DC-DC converter 120 is installed between the high-voltage battery 110 and the power control ECU 140. It is a voltage converter that converts the voltage from the high-voltage battery 110 into the required voltage and outputs it to the power control ECU 140. The auxiliary battery 130 is a rechargeable secondary battery, such as a lithium-ion battery. This auxiliary battery 130 can supply its stored power to the power control ECU 140. The power control ECU 140 is configured to supply and control power to multiple loads, such as numerous devices and equipment mounted on the vehicle, using the high-voltage battery 110 and the auxiliary battery 130 as power sources. This power control ECU 140 performs complex power supply and control according to various vehicle conditions and has control logic to maintain the vehicle's condition appropriately in the event of abnormalities such as disconnections or short circuits in the power supply path. The automated inspection device 200 is configured to simulate and reproduce abnormalities that may occur in multiple loads connected to the power control ECU 140 in an actual vehicle, as well as abnormalities that may occur in the high-voltage battery 110 and auxiliary battery 130, which are power sources, and to inspect whether the power control ECU 140 is operating correctly (as designed) in the event of an abnormality. This automated inspection device 200 comprises multiple simulated loads 211, 212, and 213, an electronic load 220, a simulated circuit 230, and an inspection unit 240. The multiple simulated loads 211, 212, and 213 are circuits that simulate actual loads such as equipment and devices mounted on a vehicle that are to be controlled. More specifically, these controlled actual loads are loads that receive power from the power control ECU 140. These simulated loads 211, 212, and 213 are constructed with resistance values equivalent to the steady-state resistance values of their respective actual loads. Furthermore, each of the simulated loads 211, 212, and 213 is capable of automatically measuring its own power consumption. Note that the number of simulated loads is not limited to the number shown in Figure 1, and can be arbitrarily set according to the state of the vehicle to be inspected (inspection state, inspection pattern). The electronic load 220 is configured to consume the input power. More specifically, the electronic load 220 consumes the power input (supplied) from the power control ECU 140, auxiliary battery 130, and DC-DC converter 120, which are connected via the simulated circuit 230 described