TI's Resonant Sensing Technology is changing the landscape of the white goods market and home appliances by providing sleek new interfaces, enhanced system awareness, and improved system efficiency metrics. This training session covers the Resonant Sensing fundamentals, application deep dives, and finally tricks and tips for designing with the technology.
More and more end equipment start to use proximity sensors to detecting the presence of nearby objects without physical contact by using electromagnetic fields, light or sound, e.g. major appliances, cell phones, robot and so on. There are many types, each suited to specific applications and environments. The object being sensed is often referred to as the proximity sensor's target. Different proximity sensor targets demand different sensors. By analyzing the basic principle of different types of sensor, comparison result with advantages and disadvantages can be achieved.
This section covers what is meter tampering, why is this a problem for utility providers, and some common ways a meter is tampered.
The first line of defense against tampering by bypassing current, reversing connections, and disconnecting leads is the meter case. Due to this, it is common for utilities to require some form of intrusion detection system to detect when someone opens a case. In this section, we will cover how to detect someone trying to open the case of a meter.
For anti-tampering, it is common to try to detect the presence of a strong magnet. In this section, we will cover the use of hall sensors for low-power detection of strong magnetic fields in three dimensions. Details on our magnetic tamper detection reference design, TIDA-00839, will be provided as well as some of the design considerations that were kept in mind when creating this reference design.
In this section, we will cover how to harden a meter against these magnetic tamper attacks by using shunts for current sensors. For poly-phase implementations, I will go over how to use isolated delta sigma modulators to add the necessary isolation to use shunt current sensors and create magnetically immune poly-phase energy measurement systems. The TIDA-00601 and TIDA-01094 reference designs, which show how to implement a poly-phase isolated shunt measurement system, will be discussed as well as the associated AMC1304 high-side power supplies used in these designs.
In this section, a summary of the entire “Securing Smart Meters from Attack with TI Analog” training module would be covered. This summary would cover the “Detecting case tamper attacks using inductive switches “, “Detecting magnetic tampering using hall-effect sensors “, and “Hardening a meter against magnetic tamper attacks “ sections of the training series. Links will be provided for the reference designs and design tools that were discussed during this training series.
Learn the opportunities of motor drives in appliances and understand why there is clear transformation happening from high voltage to low voltage motor drives
Learn the different power stage architectures and topologies for low voltage brushed DC and stepper motor drives and understand typical system design challenges and differentiated solutions from Texas Instruments.