JPS5932830A - Temperature distribution displaying method - Google Patents

Abstract

PURPOSE:To display a local, relatively minute temperaure difference in a body in the field of view simply, by detecting infrared rays from a body at a first focal point in an optical system, detecting the infrared rays from the body at a second focal point in the optical system, and displaying the temperature distribution of the body, based on the difference signal between two kinds of the detected signals. CONSTITUTION:When one scan in the field of view is finished, a concave mirror 2 is slightly moved in either direction by a moving mechanism 13 based on the command from a control circuit 10. Thus the focal point is shifted. Then, the control circuit 10 changes a switch circuit 7 so that the detected signal from a detector 5 is supplied to a second memory means 9. Under this state, a reflecting mirror 1 is vibrated once in the horizontal and vertical directions again, and infrared rays are detected from a specified field of view. The detected signal is stored in the second memory means. At this time, the signal having the waveform shown in the Figure (a) is detected. At the time of the second scanning, the focal point of the optical system is shifted. The infrared rays from the relatively broad part of the surface of a body are inputted to the detector 5. The signal having the waveform shown in the Figure (b) is detected by, e.g., the scanning in the horizontal direction for said specified part.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of displaying a temperature distribution in which infrared rays emitted from an object are detected via a scanning optical system, and the temperature distribution of the object is displayed.

In the case of a digital camera that displays the temperature molecules fi of an object, the infrared rays generated from each point within the field of view are scanned and focused and introduced into an infrared detector, and the detected signal is combined with the above scanning. 11) Send it as a bright signal to the cathode ray tube that has been set up for 1 time, and get a bright image of the object within the field of view. Tokoro ゛, in this direction - 17 graph - r - g setting,
It is necessary to set the temperature range in advance (displaying the shade above the line), but if this temperature range is set wide, it will be difficult to distinguish the shape of the entire image. However, it is difficult to distinguish local temperature differences in the image, which are relatively small.On the other hand, in order to clearly distinguish temperature differences as small as IL1, it is necessary to display them on a cathode ray tube. temperature)
It is better to set the U range narrowly, but if the object in the field of view is wide as a whole (warm width / J') (in this case, find a temperature between 71 and 95 where there is a minute temperature difference, and set the cathode ray tube in that range) Setting the temperature range to be displayed is a very troublesome task.

The present invention has been developed in view of the above-mentioned problems (for example, it is possible to easily display a relatively small local temperature of an object within the field of view in °C). A11, 1 (
We aim to provide a method shown in Figure 1.

A method of displaying temperature based on the present invention (1) Infrared rays emitted from the surface of an object are guided to a detector via an optical system. The temperature of the object is displayed based on the above display method.
C1 Detect the infrared rays from the object at a first focal position J in the optical system, and detect the infrared rays from the object at a second focal position Jj,
The infrared rays from the object are detected at position j, and the warm melon portion of the object is displayed based on the difference signal between the two types of detection gates.

Detailed description of one embodiment of the invention based on the drawings 1
, FIG. 1 shows an example of a Luri-one Granoy device for carrying out the method according to the present invention, in which there are 1 mirror 1° and 2 mirrors concave.
．． Lens 3 is subject to 'a I'J + from the surface of object 4 +17
A scanning optical system 114 is configured to guide the scanning line to the infrared detector 5. However, the infrared rays emitted from the microscopic part of the object 4 are reflected by the reflecting mirror 1, and the infrared rays are reflected by the reflecting mirror 1. The light is focused by the lens 3 (a), but the mirror 1 is focused horizontally and in the single-tooth direction by the scanning mechanism 6! Q 1JJJ, this vibration 7
Accordingly, infrared rays emitted from different minute parts 1)+r of the object enter the detector 5j. The detector 5
The signal g1 detected as J is the switch circuit 7).
) C is supplied to the storage means of either the first storage means ε3 or the second storage means S], and 1;
Here C, the vibration of the reflecting mirror 1, that is, the horizontal 9 times of the object
! 1f3G'J to the running C1 in the lj) direction and the switch circuit 7.
(i) command +, m J from the control circuit 10
,】(1) I, 10th stage 8,0 of the first and second notes (Juru舊) - J's memory is that the water of the object is 11° heavy and straight P
i (according to the 1'/- position*, "'(ti is applied.
1 and number 1 stored in the second storage means are the control circuit 10.
According to a command from U13I, the signal is supplied to the circuit 11, and both (E: 3's X-signal 5mo) are obtained. The required signal is I, lj V, L Yin (~ray Shin'12 is supplied with Teru 1 Ryojin and ()C, and accordingly (1; the λ polar ray tube has an object 4
The temperature of 1j is displayed (1, above)! The concave mirror 2 is placed in the moving mechanism 13 in the direction of the arrow in the figure. 19] body 4
Infrared rays from a minute portion of the person 1. l”l
'tIruru, IJ 4 doors) The fire fish's a-) is returned to the state 3, this state ry = r anti-IJ mirror 'I is horizontal,! 1
"It is scanned once in the perpendicular direction, and the infrared rays from the PJi constant extinction of the object 4 are supplied to the first storage means 8 via the switch circuit and stored. One scan within the field of view is completed. Then, the concave mirror 2 is moved in either direction by the moving mechanism 13 in response to a command from the 1st valley 11 circuit 10, and the focus is shifted.

Historically, (11 circuits'10 uses switch circuit 7 as detector ξ
) detection G? "Jj is supplied to the second storage means 9. In this state, turn the mirror 1 horizontally again.
The infrared rays from a predetermined field of view are detected by one vibration pulse in the vertical 75 direction, and this detected Buddha gate is stored in the second storage means. Here, during one scan (1), the focus of the optical system is focused), so infrared rays from a minute part according to the scanning of the object enter the detector 5, and for example, when scanning a specific part in the horizontal direction. At this time, the waveform of the waveform 1 shown in FIG. 2 <a> is detected. This number 1 includes temperature changes in the overall screen size 4 and local minute temperature changes.Next, 2
During the first scan, the focus of the optical system is shifted and the infrared rays from a relatively wide part of the object's surface enter the detector 5. By scanning in the direction, the waveform H, 3 is detected in Figure 2 (tl), and this Iha H5 includes a significant temperature change over the entire screen.The focal point of the optical system Since it is hot (4 f), the resolution is poor and local minute temperature changes are erased.

1-i When the predetermined areas of the first and second time objects have been compressed, they are stored in the first storage means ε3 and the second storage means 9! , :The data for one car and 1rii of the 4i1i line mark are supplied to the line drawing circuit 11, and the I (ci and the difference between the two bow surfaces) is determined according to the scanning position h'. By finding the difference, we can find the common inclusion in both signals, 4.
The crowded temperature change component 41 is erased, and only the local minute temperature change component obtained during the 11th mouth scan is converted into a difference signal C1-1 as shown in FIG. 2(C). Become. The difference signal is applied to cathode ray tube '12, resulting in l!
The temperature distribution image of the object in the field of view on the top surface of the polar ray tube is displayed (a temperature distribution image showing small degree changes is displayed. (Ratio of the imaged object with C temperature change) It is possible to extract and display only the J part that shows a minute temperature change of 1t2. However, the present invention is not limited to the above-mentioned embodiments, and can be modified in many ways.
11 For example, although the concave mirror was configured to move the position to shift the focus of the optical system, it is also possible to insert an infrared transmitting part with a large refractive index into the optical path to shift the focus. 'b Good. Although the case of displaying a two-dimensional image has been described above, the present invention can also be applied to a case where an arbitrary part of an object is scanned linearly and a signal is displayed in a waveform based on the scan. Furthermore, although the focal point is shifted every time one screen is scanned and the difference between the two types of signals is obtained, it is also possible to shift the focus every one horizontal scan and obtain a difference signal of 15. Furthermore, the scanning optical system is not limited to that illustrated in FIG. 1, and the display means is not limited to the cathode ray tube either.

[Brief explanation of drawings]

FIG. 1 is a diagram showing an example of a surtography apparatus for carrying out the present invention, and FIG. 2 is a waveform diagram used to explain one embodiment of the present invention. 1: Reflector, 2: Concave mirror, 3: Lens, 4: Image object, 5: Detector, 5: Scanning mechanism, 7: Switch circuit, 8.
9: Storage means, 10: Control circuit, 11: Subtraction circuit, 12
: Cathode ray tube, 13: Movement mechanism. Patent applicant Hiki Electronics Co., Ltd. Representative: Mr. Ito

Claims (1)

[Claims] J5 is a display method in which infrared rays emitted from the surface of an object are guided to a -C detector via an optical system, and the temperature distribution of the object is displayed based on a signal from the detector. :The optical system detects the infrared rays from the object at the first focal position, and detects the infrared rays from the object at the second focal position of the optical system. Based on the difference signal - (temperature distribution display y for displaying the temperature distribution of the object) method.