J. Shida

A new temperature telemeter with temperature-sensitive magnetic cores

A new telemeter has been made by using temperature -sensitive magnetic cores. The system needs only units such as a temperature-frequency converter using the temperature-sensitive magnetic cores and a power amplifier since it converts core temperature directly into high frequency. It seems to be useful in the field of temperature management because it can be used to measure temperature in water and in the sea.

Use of a temperature-sensitive ferrite for temperature/humidity measurements

A temperature-sensitive ferrite (TSF) is a multi-ability sensor, which adds the functions of a thermistor and a switching diode to the temperature-sensitive magnetic core. The TSF has a humidity dependence which causes the resistance to decrease with a rise in humidity. Magnetic reluctance is temperature-dependent and is independent of humidity. Techniques for converting temperature and humidity into frequencies are discussed. >

New magnetic scaler used as universal arithmetic module for pulse-train signal processing

This paper describes a new magnetic decimal scaler as a universal arithmetic module (UAM) realized by expanding the function of the multi-level magnetic scaler. In order to implement pulse-train signal processing systems, three arithmetic operations (addition, multiplication and delay) are required. The proposed UAM has adder, multiplier and delay functions, all in one. So the pulse-train signal processing systems can be implemented by using only UAMs as a basic building block. This results in high reliability and simplicity with respect to the operation and construction of the systems, as compared with the case using commercially available binary-circuits.

Photo-magnetic semiconductor using pyromagnetic effect

A photomagnetic semiconductor (PMS), composed of a thick film magnetic semiconductor and a radiant flux absorbent, is described. The PMS with a thickness of 55 mu m is made of a ferrite powder and a ruthenium compound and its surface is painted with a radiant flux absorbent. The PMS is a pyromagnetic film utilizing the temperature dependence of the magnetic reluctance. When visible rays are radiated to the PMS, the radiant flux absorbent captures the light energy and transfers thermal energy to the magnetic semiconductor, which causes the reluctance change of the PMS. Therefore, the PMS acts as a nonwinding photomagnetic transducer. The PMS is suitable for use as a photosensor, a photorelay, a photochopper, or an exposure meter. >

Investigation of multi-ability temperature-sensitive magnetic semiconductor with non linear negative resistance

The temperature-sensitive magnetic semiconductor is one kind of ferrite which is called a temperature-sensitive magnetic core whose magnetic and electrical properties both exhibit a marked temperature dependence. The temperature-sensitive magnetic semiconductor can be regarded as a multi-ability magnetic semiconductor device, having the effect of adding a thermistor and a bidirectional diode to the temperature-sensitive magnetic core.

Indicating thermometers using a temperature-sensitive magnetic core

New indicating thermometers have been made by us with a temperature-sensitive magnetic core. Our instruments need no converter such as other electric thermometers use since they make use of the temperature-sensitive magnetic cores reluctance. The instruments can be utilized as panel, portable, and monitoring thermometers.

A new environmental monitor sensor utilizing thick-film magnetic semiconductor

The preparation of a thick-film magnetic semiconductor (TMS) using ferrite powder and a ruthenium compound is described, and the application of its properties to a multipurpose sensor is considered. The TMS was sintered at a relatively low temperature and showed ferromagnetic and semiconducting properties which were dependent on the temperature, humidity, and gas concentration. The TMS is a versatile device: a temperature-sensitive magnetic core, a thermistor, and a varistor can be added to ordinary resistance and capacity elements. Considering these characteristics, the TMS can be used as a temperature/humidity/gas sensor for a modulated environmental monitor. A novel temperature-signal readout method due to the magnetic head is also introduced for the TMS pattern sensor. >

Temperature-speed characteristics of new motors utilizing temperature-sensitive magnetic cores

The possibility of using temperature-sensitive magnetic cores in the field of rotating electric machinery has been proposed by us, and new motors with such cores as a part of the magnetic path have been made. These simplified motors of which the speed is automatically controlled by the temperature change have a larger temperature dependence than ordinary motors.

Multi-Ability Sensor Module Using a Temperature-Sensitve Magnetic Semiconducter with Humidity Dependence

The temperature-sensitive magnetic semiconductor (TMS) is a multifunctional sensor with thermistor and thyratron-type bidirectional diode functions in a temperature-sensitive magnetic core. In the TMS, capacity and resistance are humidity dependent and they decrease with rising humidity. The temperature dependence of the magnetic reluctance is independent of humidity. The current-voltage characteristics show a bidirectional non-linear conduction phenomena which covers three states; a cut off state, a negative resistance state and an on state. The application of the TMS for utilization as a versatile temperature/humidity measurement module is shown.

Development of Photo Sensor Using Magnetic Semiconductor

This paper describes the preparation and response to light stimulation of a magnetic semiconductor photosensor (MSP). The MSP is composed of ferrite powder, binder, solvent and a radiant flux absorbent. After the mixed magnetic semiconductor fluid is printed using a spray gun, it is sintered at 800C and its surface is covered with radiant flux absorbent. When light in the visible wavelength range is incident on the MSP, the radiant flux absorbent absorbs the radiant energy and the element temperature rises. As a result the MSP reluctance increases, so that an optical stimulus is manifested as a change in magnetic behavior, that is read out by a Hall element. MSPs can be used in photo relays, illuminance meters and photocouplers.