JPH01288085A - Infrared ray monitor - Google Patents

Abstract

PURPOSE:To confirm temperature fault data easily visually by blinking only a picture of a faulty part in excess of a threshold setting range. CONSTITUTION:A preset threshold setting data and a digital data outputted from an infrared ray camera 2 for each picture element are compared by a comparator 8 to separate a normal data and a faulty data of temperature surely in the unit of picture elements. Then the fault data is inputted to a polarity blink device 9 to add repetitively a positive sign and a negative sign at a required time interval and they are stored in the buffer memory 10 in the original data order and then stored in the frame memory 3. When the data is read out of the frame memory 3 and converted into a video signal by a D/A converter 4, the signal becomes a signal of a brightness level required for picture display on a TV monitor 5 and the part of fault data with positive and negative signs added repetitively is displayed so as to be blinked on the screen while its brightness level is fluctuated largely. Thus, visual confirmation is facilitated.

Description

[Detailed Description of the Invention] [Summary] The present invention relates to an infrared imaging device, in particular an infrared monitoring device that visually determines an abnormality in an image, and provides an infrared monitoring device that can easily visually identify temperature abnormalities by TJ'fi. With the aim of
In an infrared monitoring device that converts and displays an infrared image, there is a reference memory that stores threshold setting data that is a reference for determining whether the temperature change is normal or abnormal, and a reference memory that stores threshold setting data and the threshold setting data for each pixel. a comparator for comparing digital data, and a polarity flasher for repeatedly adding a positive sign and a negative sign at a required time interval to the digital data for which the comparison result of the comparator is determined to be outside the reference temperature range; a buffer memory that stores the digital data whose comparison result of the comparator is determined to be within the threshold and the output of the polarity blinker in the order of the original data; and the output of the buffer memory is stored in the frame memory. It consists of an address control unit.

[Industrial application field]

The present invention relates to an infrared imaging device, and more particularly to an infrared monitoring device that visually checks an image to determine an abnormality.

[Conventional technology]

FIG. 3 shows a block diagram of a conventional infrared imaging device. In the figure, 1 is a target scene to be monitored, 2 is an infrared camera, which scans the target scene with an optical system (not shown), detects infrared rays contained in the target scene with a multi-element detector (not shown), Outputs temperature information for each pixel as digital data.

Reference numeral 3 denotes a frame memory for updating and storing the digital data for each scan. 4 is a D/A converter which reads the information stored in the frame memory 3 and converts it into a video signal. 5
is a TV monitor that displays the input image signal on the screen. 6 is an address controller which receives a synchronization signal necessary for scanning of the infrared camera and writes data into the frame memory 3;
Performs read address control.

FIG. 4 is an explanatory diagram of a conventional display screen, and FIG. 1 will be explained below with reference to FIG. 4. When performing visual monitoring (confirming abnormal temperature areas) using an infrared imaging device, for example, if the abnormal area is a cat 5a having a body temperature on the screen shown in FIG. 4, this abnormal area has a different color from the background color 5b. Discrimination was done by using the color displayed. In other words, by predetermining a display color corresponding to temperature and displaying a temperature pattern using infrared rays in color, temperature identification was performed by looking at the color.

[Problem to be solved by the invention]

If the temperature of the abnormal area is close to the background temperature, there will be little change in color and it will be difficult to distinguish. Furthermore, when the range of temperature change is narrow, it is difficult to visually identify each pixel.

The present invention has been made in view of the above-mentioned conventional drawbacks, and an object of the present invention is to provide an infrared monitoring device that allows for easy visual confirmation of temperature abnormalities.

[Means to solve the problem]

FIG. 1 is a block diagram showing the configuration of the present invention. A frame memory 3 that stores digital data for each pixel output by an infrared camera 2 that monitors temperature changes in the target scene 1.
The data read from the frame memory 3 is
In an infrared monitoring device that performs A conversion and displays an infrared image, there is provided a reference memory 7 storing threshold setting data serving as a reference for determining whether the temperature change is normal or abnormal, and the threshold setting data and the pixel. A comparator 8 that compares digital data of each time, and a polarity that repeatedly adds a positive sign and a negative sign at required time intervals to the digital data whose comparison result of the comparator 8 is determined to be outside the range of the reference temperature. a blinker 9; a buffer memory 10 for storing digital data for which the comparison result of the comparator 8 is determined to be within the threshold and the output of the polarity blinker 9 in the original data order; and the buffer memory 10.
and an address controller 11 for storing the output of the frame memory 3 in the frame memory 3.

[For production]

By comparing the preset threshold setting data with the digital data for each pixel output by the infrared camera 2 using the comparator 8, normal temperature data and abnormal temperature data can be reliably separated for each pixel. This abnormal data is inputted to the polarity blinker 9 to have positive and negative signs repeatedly added to it at required time intervals, stored in the buffer memory 10 in the order of the normal data and the original data, and then stored in the frame memory 3. be done. Read from frame memory 3, D/
When converted into a video signal by the A converter 4, this signal is T
This is a signal with a brightness level necessary to display an image on the V monitor 5, and the part of the abnormal data where the positive and negative signs are repeatedly added has a brightness level that fluctuates greatly and is displayed as blinking on the screen. Visual confirmation becomes easier.

〔Example〕

Embodiments of the present invention will be described in detail below with reference to the drawings.

In order to make the description of the configuration and operation easier to understand, the same parts will be designated by the same reference numerals throughout the design and their repeated description will be omitted.

FIG. 1 is a block diagram showing the configuration of the present invention.

In the figure, 7 is a reference memory that stores threshold setting data that serves as a reference for determining normality/abnormality of temperature information for each pixel output by the infrared camera 2, and the upper limit value is Si + the lower limit value is 32 The digital value of the temperature information for each pixel output by the infrared camera 2 is set as Dn+
shall be.

8 is a comparator that compares the upper limit value SI+lower limit value S2 of the data of the reference temperature range with the digital data Dm for each pixel; 9
Reference numeral 10 indicates a polarity flasher that repeatedly adds a plus sign and a minus sign to input digital data at required time intervals, and 10 indicates a buffer memory.

When the comparator 8 compares the data and the result is within the threshold setting range of S, >Dm>, Sz, the digital data is directly stored in the buffer memo January 0.

If the comparison result is S, <Dm or S, >Dm, the digital data is input to the polarity flasher 9, and a positive sign and a negative sign are input at the required time interval (e.g., 0°5 second interval where the flashing can be visually confirmed). are added repeatedly and then stored in the buffer memory in the original data order. buffer memo 1
The data stored in month 0 is transferred to the frame memory 3.

Reference numeral 11 denotes an address control section whose functions, in addition to those of the address control section 6 explained in the prior art section of FIG. It has a continuous output function. Furthermore, the D/A converter 4 is provided with a configuration for detecting the blinking code, and a configuration for inverting the black and white level of analog-converted data in the case of data with a negative sign and outputting the resultant data.

The symbols a to g in the figure correspond to the time chart in FIG.

Figure 2 shows the time chart for the first country name section, and the following is the time chart for the second country section.
FIG. 1 will be explained with reference to the drawings.

(a) is digital data in pixel units output by the infrared camera 2, and its values are output in the order of output D++Dz+...D
Let m, Dn-H, and Dn. (bl indicates the comparison function of the comparator 8 that compares the upper limit value S++ and lower limit value S2 of the data of the reference temperature range stored in the reference memory 7 and the digital data Dm for each pixel.

fcl indicates the output of normal data when the comparison result is Sl>Dm>Sz, and (d) indicates the output of abnormal data when the comparison result is S, <Dm or S2>Dm. (01
is the output of the polarity blinker, and a positive sign and a negative sign are repeatedly added to the abnormal data at a required time interval. (f) shows the output of the buffer memory 10 in which data C and e are stored in the order of the original data a. (g) is an output waveform of the D/A converter 4, which is converted into a video signal for displaying an image on a TV monitor, and the peak value indicates the brightness level (voltage). In the abnormal data portion, data with a positive polarity sign is converted as is into an analog signal, and data with a negative polarity sign is converted into an analog signal with the black and white levels inverted.

As a result, the waveform at the abnormal part is inverted in black and white at a required time interval as shown by the broken line, and as a result, only the abnormal data part becomes brighter or weaker on the display screen and blinks, making visual confirmation easier.

〔Effect of the invention〕

As is clear from the above description, according to the present invention, only the image of the abnormal portion exceeding the threshold setting range flashes, so that visual confirmation is facilitated, which is a significant industrial effect.

[Brief explanation of the drawing]

Figure 1 is a block diagram showing the configuration of the present invention, and Figure 2 is a block diagram showing the configuration of the present invention.
FIG. 3 shows a block diagram of a conventional infrared imaging device, and FIG. 4 shows an explanatory diagram of a conventional display screen. In Figure 1, 1 is a target scene, 2 is an infrared camera,
3 is a frame memory, 7 is a reference memory, 8 is a comparator, 9
10 represents a polarity flasher, 10 represents a buffer memory, and 11 represents an address control unit. Conventional display of external edges 6 Diagram (Figure 3)

Claims (1)

[Claims] An infrared camera (
2) includes a frame memory (3) that stores digital data for each pixel output by the infrared monitoring device that displays an infrared image by D/A converting the data read from the frame memory (3), Standard memory (standard memory) that stores threshold setting data that serves as a standard for determining whether temperature changes are normal or abnormal.
7), a comparator (8) that compares the threshold setting data and the digital data for each pixel, and the comparator (8)
a polarity blinker (9) that repeatedly adds a plus sign and a minus sign at required time intervals to digital data whose comparison result is determined to be outside the reference temperature range; and a comparison result between the comparator (8). a buffer memory (10) for storing digital data determined to be within the threshold and the output of the polarity blinker (9) in the order of the original data; and a buffer memory (10) for storing the output of the buffer memory (10) in the frame memory. (3) An infrared monitoring device comprising an address controller (11) stored in an address controller (11).