Metrological Support of Medical Drillings at the Lateral Skull Base

For minimally invasive drilling processes, the temperature development in the drilling ground is of crucial importance for patient safety. To monitor the temperature during drilling, a drill prototype was developed by BREDEMANN ET AL. which can record the drill temperature in parallel to the process and in real time. The measurement principle of the thermistor (temperature sensor) integrated in the drill could be validated. [1] The prototype must be refined for use in the operating room, as the drill does not yet meet all the medical requirements that need to be fulfilled. In further development, the recorded temperature data in particular must be processed and communicated to the surgeon in order to provide added value for the surgical procedure.

Recent Patents for Thermistor Temperature Sensor

Background: The collection of temperature is very important in life. Thermistor temperature sensors are an important part of the temperature acquisition system. Thermistor temperature sensors can convert the temperature signal into an electrical signal for output. Due to the different application fields and technical requirements, the shape, function and structure of thermistor temperature sensors are very different. Objective: The purpose of this study is to summarize and analyze the advantages and disadvantages of various devices from a large number of documents and patents. Methods: In this paper, the patents and the latest research of thermistor temperature sensors are reviewed. Results: By summarizing the characteristics of a large number of thermistor temperature sensors and analyzing the problems, the development of thermistor temperature sensors are prospected. Conclusion: Thermistor temperature sensors are widely used. Therefore, it is necessary to carry out special structural design and technical research for thermistor temperature sensors in different application fields. At the same time, with the development of technology, intelligent sensors and multi-functional sensors are an inevitable development trend.

Use of Thermistor Temperature Sensors for Cyber-Physical System Security

The last few decades have seen a large proliferation in the prevalence of cyber-physical systems. This has been especially highlighted by the explosive growth in the number of Internet of Things (IoT) devices. Unfortunately, the increasing prevalence of these devices has begun to draw the attention of malicious entities which exploit them for their own gain. What makes these devices especially attractive is the various resource constraints present in these devices that make it difficult to add standard security features. Therefore, one intriguing research direction is creating security solutions out of already present components such as sensors. Physically Unclonable Functions (PUFs) are one potential solution that use intrinsic variations of the device manufacturing process for provisioning security. In this work, we propose a novel weak PUF design using thermistor temperature sensors. Our design uses the differences in resistance variation between thermistors in response to temperature change. To generate a PUF that is reliable across a range of temperatures, we use a response-generation algorithm that helps mitigate the effects of temperature variation on the thermistors. We tested the performance of our proposed design across a range of environmental operating conditions. From this we were able to evaluate the reliability of the proposed PUF with respect to variations in temperature and humidity. We also evaluated the PUF’s uniqueness using Monte Carlo simulations.

A method of direct diagnostics of thermoresistive temperature sensors in vehicle

The article discusses thermistor temperature sensors used in automotive vehicles. The characteristic types R=f(T) of thermoresistors as well as their technical and operational parameters are presented. The applications of particular types of thermoresistors in temperature measurements in automotive vehicles are discussed. On the example of the coolant temperature sensors diagnostics is presented. The test results and conclusion regarding the tested sensor diagnostics is presented. The test result and conclusions regarding the tested sensors are presented.

Thermistor Temperature Measurement Network with a Small Number of Wires

The article proposes a new measuring circuit for temperature control at multiple points of the product using a sequence of thermistors and diodes with three connecting wires and two voltage sources. A mathematical model and a computational algorithm for calculating the resistance of thermistors are presented which consist in the formation and sequential solution of systems of linear algebraic equations for different ratios of voltages of two power sources. A model problem and the results of a computational experiment are considered

Design, Construction, and Calibration of a Temperature Monitoring System for Resistance Standards

We present the design, construction, calibration, and software development of a temperature monitoring system for resistance standards. The system supports 19 temperature probes. Over the range 295.15 K to 299.15 K (22 °C to 26 °C), we report an expanded uncertainty (k = 2) of 9 mK. With the addition of a calibrated standard reference thermometer and a programmable oil bath, the system was used to automatically calibrate the temperature probes over this 4 K range. In continuous operation, this system supplies a constant current to thermistor temperature probes and a reference resistor, and it measures the voltage across them. The ratio between each of the probe voltages and the reference voltage is multiplied by the reference resistance to determine the resistance of each probe. To reduce systematic errors, voltage measurements are taken with the current flowing in both directions. Finally, using the Steinhart-Hart model, the probe resistances are converted to their corresponding temperatures and recorded to a secure network drive. If a probe reads a temperature outside of the desired temperature range for its location, an email alert is sent to all the staff who work in the laboratory. An additional message will be sent to facility services if the probe is measuring the room temperature in the laboratory. The system was developed for the NIST resistance laboratory, but it could easily be duplicated for use in any laboratory environment where continuous temperature monitoring in multiple locations with expanded uncertainty (k = 2) of 9 mK is needed.

Efficient Calibration Tool for Thermistor Temperature Measurements

We propose a tool to calibrate the coefficient variables of the Steinhart–Hart equation, which are used in temperature measurement with a negative temperature coefficient thermistor. The previous method modifies the coefficient variables manually, but the proposed tool takes a measured temperature and automatically modifies the coefficient variable. The proposed calibration tool provides a graphical user interface program for the convenience of users. It is applied to the 4-point temperature measurement of polymerase chain reaction and has a degree of precision of ±0.1 °C in the temperature measurement evaluation