Comprehensive evaluation of vehicle systems using real signals

Summary

In recent years, as electric vehicles have become more electrically-driven and intelligent, their control systems have become more complex, and the overall evaluation of vehicle systems has become increasingly difficult.

Subsystems controlled by ECU, including electric motors, batteries, driving support functions such as ADAS/AD, steering and anti-lock brakes, and safety devices such as airbags and seatbelts, are networked by in-vehicle serial buses such as CAN FD. Another important evaluation item is the improvement of ride comfort with reduced noise and vibration.

The comprehensive evaluation of vehicle systems on test benches, test courses and public roads covers a wide range of items, and it is impossible to conduct repeated experiments. Therefore, it is important that in-vehicle serial bus data and analog signals can be recorded simultaneously, that raw data can be recorded for a long time and analyzed later, and that multiple items can be measured reliably even under noise.

The DL950 is a newly designed ScopeCorder that significantly enhances the functionality and performance of the DL850 series, which has been well received in the automotive industry.

Points

In waveform measurement of high voltage or large current, there is a possibility of short circuit, electric shock accident or damage of the measuring instrument caused by insulation failure, wrong wiring, over-input, etc. In order to prevent such accidents, it is important that the measuring instrument has an isolated input. The ScopeCorder series, including the DL950, offers a variety of isolated input modules, including up to 1000 V input modules.

Voltage and current of various motors and control systems, motor rotation speed, battery voltage fluctuation, vibration, noise, temperature, strain, etc. may be measured simultaneously. The DL950 has a maximum of 32 channels, and up to 160 channels with 5 units synchronization.

High-speed sampling is required to understand sudden voltage fluctuations in inverters and batteries. The DL950 is capable of sampling up to 200 MS/s. You can also set a different sample rate for each channel, reducing the amount of data combined with slower sample channels such as temperature.

CAN /CAN FD /LIN /SENT in-vehicle serial bus data can be displayed by trend. For example, vehicle speed data  on CAN FD can be measured simultaneously with sensor outputs such as voltage and current of motor drive, motor speed, temperature and vibration.

Using 8 G points memory and a 512 GB internal SSD, you can record your data for extended periods of time. Flash acquisition is also available for even higher sampling rate recording.

Coupled with IS8000 integrated software, the system can record real-time and long periods of time on PC storage via 10 Gbps Ethernet (/C60 option).

Features

Intuitive touch with the 12.1-inch XGA touch screen. It is also designed to operate normally in noisy environments near the inverter. If the touch screen malfunctions, turn off the touch screen and use the hard key and jog dial to operate all functions.

Using the power analysis function (/G05 Option), the power and conversion efficiency can be calculated and displayed in real time from the inverter input/output voltage and current as well as the motor rotation speed and torque. The effect of harmonics due to disturbance can also be analyzed.

The IS8000 integrated software synchronizes the DL950 with the accurate WT5000 for rigorous motor inverter evaluation.

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