Reference design for a distance and weight measurements system utilizing inductive sensing to include weight and distance measurements into mechanical techniques.
Distance and weight measurements are essential in varied industrial and end-equipment techniques, the place exact and correct measurements are required for optimum efficiency. Texas Devices (TI) has launched a reference design for distance and weight measurements utilizing inductive sensing to cut back system prices. The reference design is a sub-system design that converts distance measurements into weight measurements utilizing springs with well-known traits. The system is designed for constructing automation and weight scale purposes. This design gives an economical answer for incorporating weight and distance measurements into mechanical techniques with out costly magnets or different sensing supplies. The design fits varied purposes akin to constructing automation, elevator techniques, weight sensors, and cargo sensors.
The reference design is predicated on the ultra-low-power microcontroller unit (MCU) MSP430F5232, chosen based mostly on reminiscence, processor energy and peripheral module necessities. The design consists of the LDC1041, an Inductance-to-Digital Converter that may concurrently measure each the impedance and resonant frequency of an LC (inductor-capacitor) resonator. It achieves this by sustaining the oscillation amplitude at a continuing degree via a closed-loop configuration whereas monitoring the power dissipated by the resonator. Within the reference design, attaining the specified distance measurement efficiency relies upon critically on the design of the sensor coil used with the LDC1041. To generate the suitable sensor coil, based mostly on the sub-system mechanical traits, the WEBENCH Inductive Sensing Designer was used. For temperature calibration and energy administration within the design, the TMP103 digital temperature sensor and the TPS7A4101 low-dropout (LDO) regulator gadgets are used. To safeguard the JTAG programming interface, the design incorporates the TPD1E10B06 Single-Channel Electrostatic Discharge (ESD) Safety Machine.
The space and weight measurement system can measure distance and weight with out utilizing costly rare-earth magnets or supplies. The reference design options calibrated sensor output from the microcontroller and low energy consumption of 37.8mW. The design operates at an influence provide vary of 7Vdc to 40Vdc. The system’s working temperature ranges from –40°C to 125°C. The inductance-to-digital converter included within the design gives system designers with an economical option to obtain excessive efficiency and reliability by utilizing a coil or spring as a sensor. The reference design employs a compact mechanical association to rework linear distance into weight, and the specified data is the burden utilized to the mechanical setup.
This reference design has been examined by TI. It comes with BOM, schematics, Gerber file, Printed circuit board (PCB) format, computer-aided design/ computer-aided engineering (CAD/CAE) symbols, Meeting drawing, Schematic, and many others. You will discover extra information in regards to the reference design on the corporate’s web site. To learn extra about this reference design, click on right here.
