Integration of a MEMS Sensor and Antenna Matching for Radio Remote Control

Project description

A leading supplier to the automotive industry develops and produces intelligent radio remote controls for use in keyless entry systems of various OEMs. To improve comfort, all variants of an existing radio key are to be equipped with a MEMS sensor to collect additional environmental data.

Helbling’s task is to integrate the MEMS sensor into the limited space of the radio remote control PCB.

Key data and technical details

  • Different PCBs with small installation space
  • A total of 9 different key variants
  • Firmware on microcontroller with limited resources
  • Implementation in Assembler and C
  • Functional test using a test box to generate and evaluate the radio signals
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Services

  • Complete revision of technology, circuit diagram and layout of the PCBs
  • Determination of required antenna adjustments for homologation
  • Optimizing the transmission power, minimizing the power loss
  • EMC measurement and corresponding adjustment of the layout
  • Manufacturing, testing and optimization of prototypes
  • Firmware development according to ASPICE Level 2 (confirmed by customer audit)
  • Configuration and operation of the MEMS sensor via SPI bus connection
  • Update and completion of the technical documentation
  • System verification test and support of vehicle tests at the end customer
  • Project management in an international development network
  • Training in older and therefore partly insufficiently commented firmware

Result / success

The integration is successfully completed and verified in several prototype generations. The required functionality is fully implemented. Through better utilization of sleep modes of the microcontrollers and improved antenna matching, the battery lifetime is extended despite the additional sensor. The extended radio remote controls are transferred to series production by several major car manufacturers.

Give us a call.

We will advise you personally.

Helbling Technik GmbH, Munich
Leonrodstrasse 52
DE-80636 Munich
Telephone:+49 89 459 29 250
info-htkm@helbling.de
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