PicoDiagnostics NVH kits
Pico's Noise, Vibration and Harshness (NVH) products enables the identification and diagnosis of unwanted vibration and noise sources in in a vehicle.
The root of all NVH problems is a vibration. In some cases these are unwanted or unexpected vibrations, and in other cases they are always present (e.g. engine combustion), but should not be transmitted to the driver/passenger.
Sound is simply a vibration that is transmitted through the air (or other medium), and is heard when it reaches a person's ear. Although the perfect hearing range is 20 Hz to 20 kHz, most of us are more like 100 Hz to 15 kHz at best. Vibrations are usually felt at frequencies below 200 Hz, and in the overlapping frequency range vibrations can be both felt and heard.
In order to deal with this frequency range effectively, the PicoDiagnostics NVH kit contains both microphones (for sound), and accelerometers (for vibrations).
Traditionally, NVH problems have been viewed as difficult to solve. NVH complaints can be subjective as people have different levels of NVH acceptance or feeling. For a technician to tackle these issues effectively they need the right tools and procedures to diagnose complaints in an objective, repeatable and easy manner. The PicoDiagnostics NVH kit does that and also generates customer reports to show that an improvement has been made against their complaint.
Although the NVH kits are available in different configurations, they differ only in the number of sensors (microphone or accelerometer), supplied. In each case a BNC cable connects the interface box to an Automotive PicoScope (sold separately). A USB cable connects your PicoScope to PC or laptop on which you run the PicoDiagnostics software. A separate J2534 Scantool or VCI (not supplied) can be used to provide RPM data, or an electrical signal can be used for RPM.
Your PicoDiagnostics NVH kit contains the following items:
The Pico NVH system has a set of wizards to guide you through the simple connections required and the vehicle data that will generate information and results in a form that are easy to understand.
The system detects vibrations (and sounds) that change (wheel, engine, propshaft etc.) and also fixed frequency vibrations (e.g. electric cooling fan). Results are displayed in an easy-to-understand report and can be viewed in the way that suits you.
Comprehensive help files explain likely causes and solutions, and the functions provided by the software make it easy to diagnose the problems in a logical way to reveal the root cause. The same system will also allow you to measure the effectiveness of any repairs or modifications and demonstrate results to the customer.