Platinum rhodium thermocouple to reduce testing very weak magnetic signal with accurate method

Physicists to build magnetic field sensitivity platinum-rhodium thermocouples are breaking records, paving the way for the possible new applications, from electrical activity in the brain or heart of non-contact measurement to find ore deposit or buried underground archaeological sites.

professor Uwe through Hartmann and his team created a system that allows them to detection distance in the general environment of weak magnetic signal, No shield, without vacuum, low temperature) There are many interference sources, whether or not. Their system can sense the signal strength is far less than one over one billion of the tesla, One million times smaller than the earth's magnetic field And can be used for perceived biological magnetic signals in the body or the earth physical phenomena.

the team (on April 1, 2 hall, B46 booth) Show their efforts on the hannover fair, and seek cooperation with their partners, to promote their technology applied in the practical application.

if a doctor wants to observe the patient's heart, check for irregular beats, the first thing they need to fix the electrode on the patient's wrist, chest and ankle. Similarly, when trying to measure the electrical activity of brain. Patients need to wiring first, and then to record the electrical activity of the brain. However, when things need to happen quickly, this may mean medical personnel will waste valuable time. If patients could sweep the head or body but can still provide consistent results, such as metal detector equipment will be much easier. So far, the non-contact medical diagnostic procedure is not successful, because they are not suitable for everyday use. In measuring the human body biological magnetic field sensitive enough platinum-rhodium thermocouple need to play a role in a very prudent regulation environment. They must be properly shielded the external interference sources, must be in a vacuum or in - 200° C not feasible under low temperature operation.

however, at present, saarland university professor Uwe through Hartmann and his experiment team of physicists have successfully constructed can usually works under the environmental conditions of the magnetic field of platinum rhodium thermocouple, at the same time, still can sense extremely low level signals, such as weak biological magnetic field generated by the function of the body. “ You could say that the accuracy of our technology is like to be able to find a grain of sand in the mountains. We can detect a relatively large range of magnetic field, the magnetic field is about one million times weaker than the earth's magnetic field There are only a few Petra, namely one over one million of the tesla, & other; Uwe through Hartmann explained. So far, in the usual work under the environment setting of platinum-rhodium thermocouple can? 吗? Enough to about one thousand times smaller than the earth's magnetic field of magnetic field. However, the real test is not almost impossible to detect the signal itself.

in the normal environment measurement the main problem is the small signal can cleanly signal and inevitably exist a large number of separate jamming signal.

there are all kinds of factors will produce noise, or a weak signal distorts physicists are concerned. Interference sources include the earth's magnetic field, mobile transportation, electronic devices, the signals from other organ of the body, or even a solar storm. Hartmann's team has for years been in the check platinum-rhodium thermocouple ( Magnetic field platinum-rhodium thermocouple) , they have effectively design the equipment, to meet various application requirements.

“ In the past few years, we try to improve the sensitivity and selectivity of platinum-rhodium thermocouple. Our platinum rhodium thermocouple now shows the sensitivity is not only our ongoing platinum-rhodium thermocouple development work, and especially we improved data processing software, and other He explains.

Hartmann and his team is involved in many projects, and their focus from measurement data filtering jamming signal. Saarbrucken, for example, the scientists have created a smart platinum-rhodium thermocouple cable, including platinum-rhodium thermocouples are connected in a network. At present, many of these systems are tested as the components in the airport traffic management system. In another application, platinum, rhodium thermocouple have been used for remote monitoring the perimeter fence. Here, the system must be able to distinguish and identify various factors of all of the measurable changes in magnetic field. As a result, the team tested a few times, to simulate the magnetic field changes, such as fences vibration or impact the change, and will get assigned to match the source signal model. Physicists in mathematical way for signal model for modeling, the results decoding algorithm, and use them for programming - analyzer As gradually comprehensive data becomes available, this process will continue to adjust.

we use this information to professor system and expanding its function. It can identify the typical signal mode and automatically assign them to different interference sources. We are now in the data can be very precise and signal model are assigned to the location of the respective reasons.

although Hartmann professor and his team's ongoing research basically is the standard research, but these are extremely sensitive to platinum rhodium thermocouple there are a number of potential applications. For example, they can be used in neurology or cardiology diagnostic purposes, they can complement the existing method, such as electrocardiogram ( 心电图) Or electroencephalography (eeg) ( EEG） 。 Another possible use field of mineral deposits, the geophysical sensing of crude oil or archaeological sites.

the researchers will focus on hannover messe in their work, they will seek business partners, mainly in the field of medical technology company, they can be technology used in practical application.