VP1-07 Investigation of transmitting coil with rotating magnetic field in real-time monitoring system for laboratory animals
Creators: Tatsuki Omori
Fumihiro Sato
Yoshiki Furuya and Syu Sasaki
Publisher: name: IEEE
Year: 2025

The purpose of animal experiments is to record changes in the biological information of experimental animals that occur during the course of the experiment, and this information is used to discuss the effects of drugs and technologies on the animals. There are a wide variety of types of biometric acquisition devices, but in recent years, the most commonly employed devices are those implanted in the body1,2. This is because they can accurately and continuously acquire biometric information such as body temperature, heart rate, activity level, and blood pressure. However, the means of supplying power to the device is a challenge. Currently, the mainstream method is to supply power from a battery embedded with the biometric data acquisition device1,3,4. Although this method can provide a stable power supply wirelessly, it does not have sufficient capacity for experiments. As a result, it is difficult to meet the greatest requirement in animal experiments, which is to monitor biological information in real time5. To solve this problem, we will construct a system in which power is constantly supplied to the biometric data acquisition device by electromagnetic induction between the power-receiving coil inside the experimental animal and the power-transmitting coil placed under the floor of the rearing cage. In addition, it is necessary to take into consideration that the coupling state of the coils changes as the position and posture of the animal changes during the construction process. Fig. 1 shows the appearance of the biometric data acquisition system to be constructed. Fig. 2 shows a graph of the magnetic flux density measured at the bottom of the power transmission coil. From this figure, it can be confirmed that the magnetic flux density in the planar direction is uniform.References: 1H. Mei, K. A. Thackston, R. A. Bercich, IEEE Trans. Biomed. Eng., vol. 64, no. 4, p. 775(2017) 2P. Cong, N. Chaimanonart, W. H. Ko, IEEE J. Solid-State Circuits , vol. 44, no. 12, p.3631(2009) 3S. T. Lee, P. A. Williams, C. E. Braine, IEEE Trans. Neural Syst. Rehabilitation Eng., vol. 23, no. 4, p.655(2015) 4T. A. Szuts, V. Fadeyev, S. Kachiguine, Nat. Neurosci., vol. 14, no. 2, p. 263(2011) 5B. D. Nelson, S. S. Karipott, Y. Wang, Sensors, vol. 20, p.4604(2020)
The purpose of animal experiments is to record changes in the biological information of experimental animals that occur during the course of the experiment, and this information is used to discuss the effects of drugs and technologies on the animals. There are a wide variety of types of biometric acquisition devices, but in recent years, the most commonly employed devices are those implanted in the body1,2. This is because they can accurately and continuously acquire biometric information such as body temperature, heart rate, activity level, and blood pressure. However, the means of supplying power to the device is a challenge. Currently, the mainstream method is to supply power from a battery embedded with the biometric data acquisition device1,3,4. Although this method can provide a stable power supply wirelessly, it does not have sufficient capacity for experiments. As a result, it is difficult to meet the greatest requirement in animal experiments, which is to monitor biological information in real time5. To solve this problem, we will construct a system in which power is constantly supplied to the biometric data acquisition device by electromagnetic induction between the power-receiving coil inside the experimental animal and the power-transmitting coil placed under the floor of the rearing cage. In addition, it is necessary to take into consideration that the coupling state of the coils changes as the position and posture of the animal changes during the construction process. Fig. 1 shows the appearance of the biometric data acquisition system to be constructed. Fig. 2 shows a graph of the magnetic flux density measured at the bottom of the power transmission coil. From this figure, it can be confirmed that the magnetic flux density in the planar direction is uniform.References: 1H. Mei, K. A. Thackston, R. A. Bercich, IEEE Trans. Biomed. Eng., vol. 64, no. 4, p. 775(2017) 2P. Cong, N. Chaimanonart, W. H. Ko, IEEE J. Solid-State Circuits , vol. 44, no. 12, p.3631(2009) 3S. T. Lee, P. A. Williams, C. E. Braine, IEEE Trans. Neural Syst. Rehabilitation Eng., vol. 23, no. 4, p.655(2015) 4T. A. Szuts, V. Fadeyev, S. Kachiguine, Nat. Neurosci., vol. 14, no. 2, p. 263(2011) 5B. D. Nelson, S. S. Karipott, Y. Wang, Sensors, vol. 20, p.4604(2020)