| 1. |
- Andersson Ersman, Peter, et al.
(författare)
-
Integration of Screen Printed Piezoelectric Sensors for Force Impact Sensing in Smart Multifunctional Glass Applications
- 2022
-
Ingår i: Advanced Engineering Materials. - : John Wiley & Sons, Ltd. - 1438-1656 .- 1527-2648. ; 24:11
-
Tidskriftsartikel (refereegranskat)abstract
- Screen printed piezoelectric polyvinylidene fluoride?trifluoro ethylene (PVDF?TrFE)-based sensors laminated between glass panes in the temperature range 80?110?°C are presented. No degradation of the piezoelectric signals is observed for the sensors laminated at 110?°C, despite approaching the Curie temperature of the piezoelectric material. The piezoelectric sensors, here monitoring force impact in smart glass applications, are characterized by using a calibrated impact hammer system and standardized impact situations. Stand-alone piezoelectric sensors and piezoelectric sensors integrated on poly(methyl methacrylate) are also evaluated. The piezoelectric constants obtained from the measurements of the nonintegrated piezoelectric sensors are in good agreement with the literature. The piezoelectric sensor response is measured by using either physical electrical contacts between the piezoelectric sensors and the readout electronics, or wirelessly via both noncontact capacitive coupling and Bluetooth low-energy radio link. The developed sensor concept is finally demonstrated in smart window prototypes, in which integrated piezoelectric sensors are used to detect break-in attempts. Additionally, each prototype includes an electrochromic film to control the light transmittance of the window, a screen printed electrochromic display for status indications and wireless communication with an external server, and a holistic approach of hybrid printed electronic systems targeting smart multifunctional glass applications.
|
|
| 2. |
|
|
| 3. |
|
|
| 4. |
|
|
| 5. |
- Aparicio, Andres, et al.
(författare)
-
Status of test methods for autonomous emergency braking systems - Results from the active test project
- 2013
-
Ingår i: SAE Technical Papers. SAE 2013 World Congress and Exhibition. - 400 Commonwealth Drive, Warrendale, PA, United States : SAE International.
-
Konferensbidrag (refereegranskat)abstract
- Novel active safety functions are introduced in road vehicles and nowadays cars, trucks and buses start to be equipped with functions to avoid collisions. The performance of these active safety functions must be possible to test and assess. There are several initiatives addressing how to test active safety. These functions are under rapid development and there is presently, and in contrast to passive safety, no generally accepted assessment programme in place. Several initiatives have identified this need for standardized testing and assessment methods over the past years. This paper gives an overview and comparison of initiatives worldwide which lately have been or are currently dealing with the topic of active safety performance testing. Among others, performance in vehicle-to-vehicle or vehicle-to-pedestrian accident scenarios is being addressed by international initiatives: the eVALUE, ASSESS and AsPeCSS projects, the vFSS working group, the CAMP-CIB initiative and the AEB group. These initiatives propose test procedures for Forward Collision Warning, Autonomous Emergency Braking and Pedestrian Detection and Protection systems. As a result, the paper will describe the initiatives addressing AEB systems and their interaction and the status of the test procedures and test targets under development. This paper is given under the umbrella of the ActiveTest initiative. It is a neutral initiative with the objective of disseminating current research dedicated to the evaluation of performance of active safety systems.
|
|
| 6. |
|
|
| 7. |
- Aronsson, Martin, et al.
(författare)
-
The programming language GCLA: A definitional approach to logic programming
- 1989. - 1
-
Rapport (övrigt vetenskapligt/konstnärligt)abstract
- We present a logic programming language, GCLA (Generalized horn Clause LAnguage), that is based on a generalization of Prolog. This generalization is unusual in that it takes a quite different view of the meaning of a logic program--a "definitional" view rather than the traditional logical view. GCLA has a number of noteworthy properties, for instance hypothetical and non-monotonic reasoning. This makes implementation of reasoning in knowledge-based systems more direct in GCLA than in Prolog. GCLA is also general enough to incorporate functional programming as a special case. GCLA and its syntax and semantics are described. The use of various language constructs are illustrated with several examples.
|
|
| 8. |
|
|
| 9. |
- Eriksson, Adam, et al.
(författare)
-
Validation of Mapping and Localization for Autonomous Vehicles
- 2023
-
Rapport (övrigt vetenskapligt/konstnärligt)abstract
- The VAMLAV project is a Vinnova FFI-funded project with the following partners: AstaZero, Zenseact, RISE and AI Sweden. The project set out to create a dataset that includes the computer vision sensors that many Advanced Driver-Assistance System (ADAS) and Automated Driving Systems (ADS) vehicles use and complement them with a high-definition (HD)-map over a known geographic area. The VAMLAV dataset includes sensors such as camera, Light Detection and Ranging (LiDAR), Inertial Measurement Units (IMUs), and Global navigation satellite system (GNSS) sensors. This dataset, publicly available at AI Sweden, offers a corresponding HD-map in OpenDRIVE format covering the Rural Road at AstaZero. The dataset includes adverse weather, multiple maps and drives around the track with emulated traffic work scenarios that can occur. Beyond creating the dataset, the project aimed to validate HD-maps by comparing them to other measurement technologies. It delved deeper into localization for ADS vehicles by comparing various measurement campaigns and designing high-accuracy anchor points. This data was later used to validate and update the HD-map. By comparing different measurement systems and samples on the map, the project hopes to increase the trust in the HD-map over a longer time. This data also makes it possible to experiment more within the field of crowdsourced HD-maps from different systems while having an easier time measuring the accuracy of such maps. Another big part of the project was related to safety therefore some data was collected where the project emulates traffic work at AstaZero. This use case is otherwise difficult to test and evaluate due to the stochastic nature of traffic work in real life. Where the system detected the traffic work with the help of map and sensor data and then distributed the information to other cars in the area.
|
|
| 10. |
|
|
