Driver assistance systems require a control unit to switch on vital assistance or to ensure availability. Vishay's intelligent battery shunt resistor and Infineon's automotive PSoC 4 HVPA monitor residual energy and distribute loads appropriately to enhance reiliability and availability.
Battery monitoring plays an essential role in ensuring a reliable power supply for high-availability control units in automotive driver assistance systems, as does sensor technology. The combination of the two components is critical in designing an intelligent battery sensor.
Parameters such as battery current and voltage are measured to monitor the battery in the vehicle. The electronics use these parameters to calculate the residual energy stored in the battery, among other variables. Based on this, a control unit can decide which loads may be switched on or must be switched off to ensure that vital assistance functions remain available.
To measure the current, an important component in any battery sensor is the sensing element, such as shunt resistors, which are the focus of this article.
The advantage of shunt resistors is that they provide a simple linear relationship between the measurand and the output signal. According to Ohm's law, the voltage drop across the shunt is proportional to its constant resistance and the current flowing through it. This makes shunts suitable for DC and AC currents as well as for both current directions. The sensitivity to interference with respect to temperature is known from the data sheet and can be calculated if the actual temperature value is known.
هذه القصة مأخوذة من طبعة October 2024 من Circuit Cellar.
ابدأ النسخة التجريبية المجانية من Magzter GOLD لمدة 7 أيام للوصول إلى آلاف القصص المتميزة المنسقة وأكثر من 9,000 مجلة وصحيفة.
بالفعل مشترك ? تسجيل الدخول
هذه القصة مأخوذة من طبعة October 2024 من Circuit Cellar.
ابدأ النسخة التجريبية المجانية من Magzter GOLD لمدة 7 أيام للوصول إلى آلاف القصص المتميزة المنسقة وأكثر من 9,000 مجلة وصحيفة.
بالفعل مشترك? تسجيل الدخول
Build an Interactive Kinetic Wall
Using a Raspberry Pi 4 and Kinect V1 Camera
Learn to Program MCUs with uLISP
Part 1: Crash Course Offers Insight Into Pioneering Language
Intelligent Automotive Battery Sensor
Shunt Resistors and Evaluation Electronics Offer Two Key Components
Understanding Mesh Circuits How to Use and Calculate Them
Microcontrollers and other digital systems concern mostly ones and zeros but when connections to the real word are needed it can get messy. Stuart writes about mesh analysis and how mesh circuits can be calculated and applied in practical scenarios.
Datasheet: Very Cool Micro Machines
Smartphone Cooling Rounds Out Parade of Advanced MEMS
Improving Patient Outcomes
Device Technology Advances Medical Practices
Bringing Cost-Effective, On-Device AI to Home Appliances - Sparse Weights and Interactions Negate GPUs and Cloud Computing
GPU silicon and cloud computing infrastructure are too costly for mass markets devices like refrigerators and washers. By deploying compute resources only to the necessary parts of AI inference, Sparse AI allows product designers to practically incorporate new AI features like natural voice interfaces into their consumer offerings without breaking the bank or electric bill surprises.
Thin Film Transistor LED Displays - Visual I/O
To add a resistive touchscreen on top of a TFT display, Jeff explores the technology offerings and libraries needed to accomplish his task. Calibrating the touchscreen's computed coordinates with the actual pixel coordinates of the display proved difficult with a modular framework but separating functions allows easy expansion.
Mobile APP Development with React Native
This month, Bob continues his series on mobile app development from an embedded designer's perspective. He programs a React Native app and he offers guidelines for picking a tutorial for React Native. He further explores how it handles concurrency and asynchronous programming. Bob expected a few nuances during the process but to say there were more than a few would be an understatement.
Power Analysis Over JTAG Ports: Hidden Debug Dangers - Block Side-Channel Analysis Attacks
Small changes in the phase of clock signals can encode power leakages. An attacker can use standard interfaces such as the JTAG port to drive clocks across targets, using them as measurement techniques for sidechannel analysis attacks despite limited physical access. This article demonstrates how you can test devices for vulnerability and how to modify devices to prevent attacks.
