In this article, the authors present a model and a method of determining thermal parameters of a single point of the thermal touch screen for the blind and thermal parameters of selected parts of a human hand. Blind people, by using this device can “see” a pattern of dots by feeling hot spots. The thermal touch screen for the blind was used as a calorimeter and enables to calculate the amount of heat provided to a finger at a temperature ranging from 8°C to 52°C, that is the full range of temperature detected by humans. The authors designated thermal conductivity and heat capacity of both Peltier micromodule and parts of the user's hand. Results of the presented research allow optimizing the construction of the thermal touch screen for the blind and may be helpful for thermal modelling of the human body.

Purpose -The paper aims to present the prototype of a graphical touch screen of thermal signs for the blind. Design/methodology/approach -The surface of every Peltier pump is a touch point that demands the thermal stabilization. Miniature Peltier modules can work both as heat and cold generators. They are also able to measure the required dot temperature. Graphical screen of thermal signs displays a simple symbol or Brail text. Special computer program was made to control this innovative device. The software enables monitoring the temperature of each Peltier module. Findings -The experiments carried out with blind people show that they are able to recognize hot and cold dots. Infrared photos of the device have been made using the thermographic MK525 camera. Originality/value -The paper illustrates that it is possible to display simple graphics by using Peltier micropumps.

Purpose – This paper aims present a thermal touch screen for the blind – a thermal tablet. A blind person using the device can imagine simple graphics or characters by touching flat thermal screen, which consists of reversible heat points, either warm or cold in different time. For the purpose, a thermal touch screen has been designed, fabricated and tested with a help of the blind. Design/methodology/approach – The screen contains 294 Peltier modules working as reversible small heat sources that keep pre-set different temperature. The tablet can easily present thermal images and characters generated directly by an interfaced PC. Design methodology is based on own authors’ patent. Findings – This paper presents original design and construction stages, as well as tests and usefulness of the device. The tests were carried out with participation of blind students who suggested how to tune the final parameters of the device in such a way that presentation and recognition of thermal information is easy and quick. Originality/value – The thermal tablet consists of original hardware and software. Both of them collaborate each other and make the tablet useful for the blind. It has been proved by series of tests.

The paper describes methodology for modelling and simulative estimation of sensitivity and range of ISM band Remote Keyless Entry transmitter-receiver system for automotive applications. The method is based on electrical simulation including PCB extraction data and parameters statistical distribution to evaluate best-and worst case scenarios. Both transmitter and receiver circuits are considered, as well as link environmental conditions. Examples of results are given for presented methodology.