The Reference Dynos Data AcQuisition (DAQ) Module which is responsible for the real-time interface between the computer running the dynometer application and the roller bed / vehicle undergoing test, comes in two variants, namely the versions 1.04 and 1.08:
Reference Dynos ver. 1.04 consists of:
4 x 0-5 Volt analogue inputs in 12 bit resolution. Input refresh rate is 1000Hz.
1 x dedicated timer input for the Main roller bed speed sensor 1. The input measures the time between pulses with a precision of 0.25uS, with an upper limit of 1000 Hz.
1 x dedicated timer input for the Slave roller bed speed sensor 2. The input measures the time between pulses with a precision of 0.25uS, with an upper limit of 1000 Hz.
1 x dedicated counter input for high frequency measurements. This counter measures input frequencies up to 100 KHz. The value of the counter is read each millisecond.
Explanation of what the 1000 Hz refresh rate and the high resolution timer input will mean for you:
With a roller bed sensor giving a signal for each 10 cm of roller circumference (~10 cm “driven” on the road) the vehicle effect, torque, inputs, etc. can be measured and logged for each 10 cm driven on the road up to 360 Km/h.
However, due to the superior resolution of the Reference Dynos measurements, please bear in mind that the above 10 cm of roller circumference is from a controls point of view split into 4000 measurements at maximum speed, which means that a imprecision of just 0.1mm in the trigger plate on the Dynometer will be measureable in a factor 4 (at 360 Km/h!). That is why some averaging is required, not because of the Reference Dynos controls, but simply be-cause of the normally expected intolerances in the installation.
Upon request it will be possible to change the analogue inputs to 0-10 Volt. Note however that >99% of the sensors on the market, used in the automotive industry is within the 0-5 Volt output range.
Reference Dynos ver. 1.08 consists of:
8 x 0-5 Volt analogue inputs in 16 bit resolution. Input refresh rate is 900Hz.
1 x dedicated timer input for the Main roller bed speed sensor 1. The input measures the time between pulses with a precision of 0.25uS, with an upper limit of 900 Hz.
1 x dedicated timer input for the Slave roller bed speed sensor 2. The input measures the time between pulses with a precision of 0.25uS, with an upper limit of 900 Hz.
1 x dedicated timer input for the Main roller bed speed sensor 3. The input measures the time between pulses with a precision of 0.25uS, with an upper limit of 900 Hz.
1 x dedicated timer input for the Slave roller bed speed sensor 4. The input measures the time between pulses with a precision of 0.25uS, with an upper limit of 900 Hz.
2 x dedicated counter inputs for high frequency measurements. These counters measures input frequencies up to 100 KHz. The value of the counter is read ~each millisecond.
Explanation of what the 900 Hz refresh rate and the high resolution timer input will mean for you:
With a roller bed sensor giving a signal for each 10 cm of roller circumference (~10 cm “driven” on the road) the vehicle effect, torque, inputs, etc. can be measured and logged for each 10 cm driven on the road up to 324 Km/h.
However, due to the superior resolution of the Reference Dynos measurements, please bear in mind that the above 10 cm of roller circumference is from a controls point of view split into 4000 measurements at maximum speed, which means that a imprecision of just 0.1mm in the trigger plate on the Dynometer will be measureable in a factor 4 (at 324 Km/h!). That is why some averaging is required, not because of the Reference Dynos controls, but simply be-cause of the normally expected intolerances in the installation.
Upon request it will be possible to change the analogue inputs to 0-10 Volt. Note however that >99% of the sensors on the market, used in the automotive industry is within the 0-5 Volt output range.
The Reference Dynos application requires the following computer hardware:
Windows © Operating system (32 or 64 bit) not announced EOL: Win 8.n and Win 10.
Minimum screen resolution: 900 x 1600 pixels.
The computer needs to have minimum two CPU cores.
One available USB 2.0 port for the Data AcQuisition (DAQ) module.
One available USB 2.0 port for the (optional) vehicle OBD interface.
List of options:
Fully integrated OBD vehicle interface package, so it is possible to log information obtained via the OBD interface during a dyno-run.
12V 4,5A SMPS power supply to feed a wide-band lambda sensor (consumption ~3A during pre-heat) and other external 12 V automotive sensors, like MAP, temperature, etc.
Sensors and much more…….what do you seek?