KR970022256A - Temperature measuring device using thermopile sensor - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a temperature measuring device using a thermopile sensor. Conventionally, food is extracted from a thermal image of a temperature distribution when a turntable rotates while continuously reciprocating a sensor using a detection position driving means such as a step motor. And the use of step motors to measure the temperature of food, which makes the sensing structure complicated by the mounting of the step motor and increases the price of the sensing device, making it difficult to apply a thermopile type infrared sensor to a microwave oven. The structure of moving the sensor itself when reciprocating the sensor by a driving means such as a step motor and a step motor is not only a difficult problem in reality, but also a noise caused by the movement of the sensor and a sensing error. Therefore, the present invention uses a planar reflector that can move a thermopile infrared sensor having a narrow viewing angle and can be moved to change the sensing area, and the driving means of the planar reflector uses a solenoid, which makes the sensing structure simple and easy to manufacture. Make it easy.

Description

Temperature measuring device using thermopile sensor

As this is a public information case, the full text was not included.

3 is a block diagram of a temperature measuring device using a thermopile sensor of the present invention;

4 is a change in the temperature measurement area according to the position of the planar reflector,

5 is a structural diagram of a reflector driving means in FIG.

6 is a change of the center of the sensor sensing region according to the rotation angle (α) of the plane reflector,

8 is a control circuit diagram of the reflector driving means in FIG.

9 is another structural diagram of the reflector driving means in FIG.

10 is a control circuit diagram of the reflector driving means in FIG.

FIG. 11 is a variation of temperature measurement area according to the position of the planar reflector in FIG.

12 is another structural diagram of the reflector driving means in FIG.

Claims (6)

A turntable positioned at the center of the heating chamber so that the load can be placed thereon; a collecting means comprising a convex lens or a concave reflector for collecting and outputting infrared rays emitted from the load in the heating chamber; and detecting infrared rays transmitted from the collecting means. Proper cooking is possible using sensing means for converting and outputting a voltage, analog / digital converting means for converting an analog signal transmitted from the sensing means into digital data, and data transmitted through the analog / digital converting means. A microcomputer for controlling each unit so as to control each unit, a planar reflector for changing a path through which infrared rays emitted from the load are incident on the light collecting means, a reflector driving means for driving the planar reflector, and rotation of a turntable transmitted through the microcomputer Temperature of each sensing area according to Drive control means for controlling the source supply to adjust the denture of the planar reflector according to the output of the load position recognizing means for determining whether the load is on the side or the center of the turntable from the data, and the sensing transmitted through the microcomputer. Noise determination means for judging whether or not the electrical noise is generated from the electrical noise value from the value, and in the case of a small load, it is impossible to sense the load temperature so that the temperature of the load can be estimated to control the proper temperature of the load. Load temperature estimating means and a temperature measuring device using a thermopile sensor, characterized in that the heating control means for controlling the operation of the heating means for generating an electromagnetic wave to heat the load. 2. A reflector driving means according to claim 1, wherein the reflector driving means comprises: a planar reflector and a three-dimensional drive iron piece so that a sensor can measure the temperature of a desired portion of the turntable, a leaf spring for holding the drive iron piece, and a solenoid for moving the drive iron piece. Temperature measuring device using a thermopile sensor, characterized in that configured. 2. The reflector driving means according to claim 1, further comprising: a driving iron piece integrated with a planar reflector, a leaf spring for holding the driving iron piece, and a first solenoid for moving the driving iron piece if the iron core is movable from side to side; Temperature measuring apparatus using a thermopile sensor, characterized in that consisting of a second solenoid for controlling the movement of the iron core of the first solenoid. The temperature measuring device using a thermopile sensor according to claim 3, wherein the first solenoid and the second solenoid are designed to face each other with the same polarity. The temperature measuring device using a thermopile sensor according to claim 2, wherein a permanent magnet is used instead of a leaf spring integrated with the driving iron piece and the flat reflector. The temperature measuring device using a thermopile sensor according to claim 5, wherein the polarity of the permanent magnet and the polarity of the solenoid are designed to face each other with the same polarity. ※ Note: The disclosure is based on the initial application.