Highly accurate and extremely energy efficient, the TDC-GP30 from ams provides a complete System-on-Chip (SoC) implementation of ultrasonic, fully static flow and/or volume measurements.
Its integrated 32-bit microprocessor performs mathematically complex and computationally intensive flow calculations with all the necessary corrections, relieving the application’s host processor or controller of this task. This means that the design of new ultrasonic flow meters may be greatly simplified and shortened, allowing manufacturers to develop cheaper, more compact and energy-efficient ultrasonic meters.
While the TDC-GP30 offers users full freedom to programme the firmware, ams also supplies the TDC-GP30-F01, which comes with pre-programmed firmware providing all the software routines needed to implement a cold-water meter.
The TDC-GP30 functions as a complete front-end flow-measurement solution, providing a digital volume output through standard serial interfaces and through a pulse interface which emulates the output of legacy mechanical flow meters.
The sensor measures water flow by capturing precise time differences between ultrasonic pulses in the direction of the flow as well as against the flow. When used in cold-water meters, the measured transit times of the ultrasonic impulses are also used for the necessary measurement of the water temperature when using the TDC-GP30-F01.
At a typical sampling rate of 8Hz, the TDCGP30 draws only 9.5μA for all operations, including calculating and correcting flow measurements. This extremely low power consumption enables the use of low-cost 2/3 AA or AA lithium thionyl chloride batteries. This means that, at a sampling frequency of 6-8Hz, a water meter can operate for more than 20 years before the battery needs to be replaced.
- Ultrasonic water meters
- Ultrasonic heat meters
- Ultrasonic gas meters
- Industrial flow indicators
- 4kbytes of non-volatile RAM for user firmware programme code
- 4kbytes of ROM
- Transducers can be connected directly with no external components required
- SPI, UART and pulse interfaces