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Using Laser Metal Printing to Cool Computer Chips

  • Magazine Article
  • TBMG-34595
Published 2019-06-01 by Tech Briefs Media Group in United States

Traditionally, electronics are cooled using a heat sink that transfers the heat generated by the electronic system into the air or a liquid coolant. For the heat sink to work, it has to be attached to the CPU or the graphics processor via a thermal interface material such as thermal paste. It helps facilitate the transfer of heat by bridging microscopic gaps between the heat sink and the chip.

 

Self-Powered Wearable Tech

  • Magazine Article
  • TBMG-34560
Published 2019-06-01 by Tech Briefs Media Group in United States

Researchers have created highly stretchable supercapacitors for powering wearable electronics. The newly developed supercapacitor has demonstrated solid performance and stability, even when it is stretched to 800 percent of its original size for thousands of stretching/relaxing cycles.

 

General Motors UART Serial Data Communications

Vehicle E E System Diagnostic Standards Committee
  • Ground Vehicle Standard
  • J2740_201905
  • Current
Published 2019-05-20 by SAE International in United States
This Technical Information Report defines the General Motors UART Serial Data Communications Bus, commonly referred to as GM UART. This document should be used in conjunction with SAE J2534-2 in order to enhance an SAE J2534 interface to also provide the capability to program ECUs with GM UART. SAE J2534-1 includes requirements for an interface that can be used to program certain emission-related Electronic Control Units (ECUs) as required by U.S. regulations, and SAE J2534-2 defines enhanced functionality required to program additional ECUs not mandated by current U.S. regulations. The purpose of this document is to specify the requirements necessary to implement GM UART in an enhanced SAE J2534 interface intended for use by independent automotive service facilities to program GM UART ECUs in General Motors vehicles.
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Interface Standard, Airborne EO/IR Systems, Maintenance and Test

AS-1C Avionic Subsystems Committee
  • Aerospace Standard
  • AS6165A
  • Current
Published 2019-05-14 by SAE International in United States
This standard defines the use of data interfaces between a host platform and an electro-optic/infrared (EO/IR) system for maintenance and test (M&T) purposes. In particular, this standard defines the use of the data interfaces in order to facilitate the: a confirmation of system performance and function; b external initiation of built-in-test (BIT) functions; c performance of other diagnostic tests of system health; d downloading M&T data; e uploading software changes. This standard does not cover mechanical or electrical interfaces, nor does it define the basic platform-to-sensor communication protocols and formats. Furthermore, this standard does not address software changes that are made by the manufacturer and not accessible at the sensor interfaces. Data protocols and formats are covered by AS6135. Electrical interfaces are covered by AS6129. This standard covers the use of the interfaces defined by AS6129 and AS6135 for the purposes described herein.
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Medium-Frequency Transformer Transitions from AC to DC

  • Magazine Article
  • TBMG-34410
Published 2019-05-01 by Tech Briefs Media Group in United States

Traditionally, electronics are cooled using a heat sink that transfers the heat generated by the electronic system into the air or a liquid coolant. For the heat sink to work, it has to be attached to the CPU or the graphics processor via a thermal interface material such as thermal paste. It helps facilitate the transfer of heat by bridging microscopic gaps between the heat sink and the chip.

 

An Assessment of a Sensor Network Using Bayesian Analysis Demonstrated on an Inlet Manifold

Caterpillar-Leo Shead
Loughborough University-Rhys Comissiong, Thomas Steffen
Published 2019-04-02 by SAE International in United States
Modern control strategies for internal combustion engines use increasingly complex networks of sensors and actuators to measure different physical parameters. Often indirect measurements and estimation of variables, based off sensor data, are used in the closed loop control of the engine and its subsystems. Thus, sensor fusion techniques and virtual instrumentation have become more significant to the control strategy. With the large volumes of data produced by the increasing number of sensors, the analysis of sensor networks has become more important. Understanding the value of the information they contain and how well it is extracted through uncertainty quantification will also become essential to the development of control architecture. This paper proposes a methodology to quantify how valuable a sensor is relative to the architecture. By modelling the sensor network as a Bayesian network, Bayesian analysis and control metrics were used to assess the value of the sensor. This was demonstrated on charge mass flow estimation in the inlet manifold. Four control architectures modelled using a Bayesian network were compared: balanced sensors, redundant sensors, synergistic sensors…
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Validation Method of Interface Specification for Cooperative Control of Individual Systems

DENSO Corporation-Hiroshi Yamaguchi, Naoya Tsuchiya
Published 2019-04-02 by SAE International in United States
As automotive electronic systems aiming for a safe and secure automobile society continue to develop, the control specifications of the ECU are becoming increasingly complex. When attempting to validate control specifications that cooperatively control different control specifications, control specification developers must consider various validation viewpoints. They narrow down the validation viewpoints based on rules from past experience, describe timing charts, and validate the specifications. However, due to complicated specifications, empirical rules do not pass, and specification mismatches are often found after actual systems completion. On the other hand, a block diagram simulator is a tool to verify control specifications. Since these tools are aimed at modeling and verifying the system design, it is efficient to describe how to implement the system. However, first it is necessary to verify the consistency between the model and the specifications. It is inefficient to verify the specification itself. In order to respond to complicated control specifications, we are working to build the simulation environment necessary to efficiently validate specifications in the specification design phase. In this paper, we describe…
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SAE ARP6338: Process for Assessment and Mitigation of Aging and Potential Early Wearout of Life-Limited Microcircuits (LLM)

DfR Solutions-Lloyd Condra, Ashok Alagappan, Craig Hillman
Published 2019-04-02 by SAE International in United States
This paper describes a Reliability Physics Analysis process to assess aging and the potential for early wearout of microcircuits, as documented in SAE ARP6338. As microcircuit feature sizes (gate length, line width, etc.) continue to shrink to near atomic levels, they become increasingly susceptible to aging mechanisms such as Electromigration, Time-Dependent Dielectric Breakdown, Hot Carrier Injection and Bias Temperature Instability effects. These mechanisms are driven by voltage, current and thermal operating stresses resulting in shorter times for aging to progress to the point where wearout can occur. If the times to wearout are shorter than the required lifetimes of the microcircuits in their applications, the microcircuits are called Life-Limited Microcircuits. A brief overview of these aging mechanisms and their impact on the long-life electronics systems used in Aerospace, Automotive, Defense, and other High Performance industries is provided. A summary of the SAE ARP6338 approach and implementation recommendations is also provided along with its importance to automotive Advanced Driver-Assistance Systems and autonomous electronic systems.
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Fast, Flexible Ionic Transistors for Bioelectronic Devices

  • Magazine Article
  • TBMG-34266
Published 2019-04-01 by Tech Briefs Media Group in United States

Many major advances in medicine, especially in neurology, have been sparked by recent advances in electronic systems that can acquire, process, and interact with biological substrates. These bioelectronic systems, which are increasingly used to understand dynamic living organisms and to treat human disease, require devices that can record body signals, process them, detect patterns, and deliver electrical or chemical stimulation to address problems.

 

Video Encoders

  • Magazine Article
  • TBMG-34131
Published 2019-04-01 by Tech Briefs Media Group in United States

Delta Digital Video Horsham, PA 215-657-5270