JPS6246818B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a digital memory type infrared imaging device;
In particular, an infrared video signal detected by an infrared camera from an object to be measured is converted into a digital signal and stored in a memory section, and the digital signal read out from the memory section at a predetermined period is converted into a television video signal and sent to a monitor. The present invention relates to a digital memory type infrared imaging device that transmits images and displays images showing multi-point temperature distribution of the object to be measured.

FIG. 1 is a diagram showing an example of the configuration of a conventional digital memory type infrared imaging device. In FIG. 1, an infrared video signal output when an infrared camera 1 scans an object to be measured (not shown) is transmitted to an analog-to-digital conversion section 201 of a control section 2, and is converted into a digital signal in units of pixels. and is transmitted to the calculation unit 202. The calculation unit 202 is controlled by the display control unit 203 to set the observed temperature range, accumulate digital signals corresponding to the upper limit temperature HT and lower limit temperature LT in the upper limit temperature register 213 and the lower limit temperature register 214, and Digital signals falling within the observed temperature range are extracted, converted into relative digital signals that divide the observed temperature range into predetermined steps, and stored in the memory unit 204. The memory unit 204 has a storage capacity of relative digital signals corresponding to picture elements for one video (for example, 448 horizontally and 220 vertically), and has horizontal coordinates H ₁ to H ₄₄₈ and vertical coordinates of the corresponding picture element. V ₁ to V ₂₂₀
A relative digital signal is stored as an address. The address is designated by the input timing generator 207 that receives a periodic signal generated by scanning of the infrared camera 1. The relative digital signal stored in the memory section 204 is used by the output timing generating section 210, the horizontal address generating section 211, and the vertical address generating section 212 to generate addresses in synchronization with the scanning of the television image.
The digital-to-analog converter 205 converts the signal into an analog signal, the television video signal converter 206 converts the signal into a television video signal, and transmits the signal to the monitor television 3. Display an image showing the distribution. Further, the digital signals accumulated in the upper limit temperature register 213 and the lower limit temperature register 214 are transmitted to the character generating section 215, and the upper limit temperature HT and lower limit temperature corresponding to each digital signal are
A character signal indicating LT is generated and displayed numerically on the monitor television 3 via the television video signal converter 206. FIG. 2 is a diagram showing an example of the screen layout of the monitor television 3. As shown in FIG. In FIG. 2, an image showing the temperature distribution of the object to be measured is displayed in the image area PA. The temperature of each part of the video area PA is the upper limit temperature HT.
(e.g. 35.3℃) and lower limit temperature LT (e.g. 25.3℃)
The luminance is estimated by comparing the luminance with a gray scale GS that indicates the luminance obtained by dividing the range (°C) into predetermined gradations (for example, 50 gradations). Furthermore, the temperature ST of an arbitrary point (spot P ₀ ) in the image area PA is determined by moving the horizontal cursor HL and vertical cursor VL to the spot P ₀ .
By adjusting the temperature, the temperature will be displayed at a predetermined position on the monitor TV screen (for example, 33.1°C). The positions of the horizontal cursor HL and vertical cursor VL are controlled by the operation of the joystick 4 shown in FIG. The address of spot P ₀ is stored in position register 208 as a digital signal obtained by converting the analog signal output from joystick 4 by analog-to-digital converter 201 . When the address generated to read the relative digital signal from the memory section 204 matches the address of spot _P0 , the relative digital signal read from the memory section 204 is read out from the spot register 2.
17 is accumulated. The relative digital signal is transmitted to the adder 216 at a predetermined time, and is added to the digital signal corresponding to the lower limit temperature LT stored in the lower limit temperature register 214, thereby obtaining the digital signal corresponding to the temperature ST of the spot _P0 . The signal is converted into a signal, transmitted to the character generating section 215, and displayed as a numerical value at a predetermined position on the monitor television 3.

As is clear from the above explanation, in the conventional digital memory type infrared imaging device, only the temperature of spot P ₀ can be numerically displayed in the image on the monitor television 3, and it is not necessary to display the temperatures of multiple locations simultaneously. It was unsuitable for some uses.

An object of the present invention is to eliminate the drawbacks of the conventional digital memory type infrared imaging device as described above, and to realize a multi-point temperature display capable of simultaneously displaying numerical values of temperatures at a plurality of locations in an image.

In such a case, the problem is how to display the distinction between the multiple locations. If it is a conventional one-point display, for example, P ₀ in Figure 2
If you specify the position of , and the temperature is displayed as ST33.1℃ as shown in the figure, it becomes clear that it is the temperature of P ₀ . However, in the case of multiple points, it is necessary to represent the points with numbers, etc., and to take measures such as arranging the specified points in numerical order so that it is easy to see that the points correspond to the points on the temperature display. Become. The present invention thus enables simultaneous display of the positions and temperature values of a plurality of designated points.

According to the present invention, an infrared video signal detected by an infrared camera from an object to be measured is converted into a digital signal and stored in a memory section, and the digital signal read from the memory section at a predetermined period is converted into a television video signal. means for converting the signal into a signal and transmitting it to a monitor television to set specified points at arbitrary plural positions in the image when displaying an image showing the temperature distribution of the object to be measured; and the image of the specified point. means for storing positional information in the monitor; means for storing character display information for distinguishing and displaying each designated point at a predetermined position on the monitor television screen; and extracting the digital signal at the designated point from the memory section. This is achieved by providing means for creating temperature information and transmitting it to a character generating section, and simultaneously displaying characters indicating the positions of the plurality of specified points and temperature values in the video.

An embodiment of the present invention will be described below with reference to FIGS. 3 to 6. FIG. 3 is a diagram showing a digital memory type infrared imaging device according to an embodiment of the present invention, FIG. 4 is a diagram showing a designated point position storage section in FIG. 3, and FIG. 5 is a diagram showing a designated point position storage section in FIG. FIG. 6 is a diagram showing a designated point character storage section, and FIG. 6 is a diagram showing an example of the screen layout of the monitor television in FIG. 3. Note that the same reference numerals indicate the same objects throughout the figures. The difference between FIG. 3 and FIG. 1 is that a multi-point temperature display section 5 is added to the control section 2. That is, the multi-point temperature display section 5 can display characters for distinguishing between a plurality of designated points, and also clearly indicate the correspondence in the temperature display corresponding to the designated points. In FIG. 3, based on the infrared video signal output from the infrared camera 1, the monitor television 3
The process of displaying an image showing the temperature distribution of the object to be measured is the same as in FIG. now monitor tv 3
When setting a designated point _P1 within the video area PA on the screen, move the horizontal cursor HL and vertical cursor VL to the designated point _P1 by operating the joystick 4. As described above, the analog signal output from the joystick 4 is converted by the analog-to-digital converter 201 into a digital signal indicating the address (V _n and H _o ) of the specified point P ₁ and stored in the position register 208 . . Next, when the switch 501 for latching the P ₁ point is operated so as to distinguish the designated point P ₁ from other designated points, the designated point control section 52 controls the television video signal notified from the output timing generation section 210. During the horizontal blanking period, the addresses (V _n and H _o ) stored in the position register 208 are transmitted to the specified point position storage section 54 and specified point character storage section 55 . Designated point position storage unit 54 and designated point character storage unit 55
are all at the same address H ₁ as in the memory section 204
Each of H ₄₄₈ and V ₁ to V ₂₂₀ has a storage capacity of 1 bit. Upon receiving the address (V _n and H _o ), the specified point position storage unit 54 stores a logical value ₁ in the address (V _n and H _o ) as shown in FIG. In order to display "1"), _the memory location in this specified point position storage unit ₅₄ is set as (V _{n +1} to
m+8) and (H _o +1 to n+8) are prepared, and in particular, addresses within this range (V
_n and H _o +1 to H _o +4), (V _n +2 and H
_o +1 to H _o +4) to (V _n +8 and H _o +1
The code 0001 indicating a character display is stored in each of the 4 bits from H _o +4 to represent the position "1" of the specified point _P1 . If position "2" is indicated, it is set as 0010.

Further, in the designated point character storage section 55, in order to generate an image display of the character " ₁ " for identifying the designated point P1 as shown in FIG. 5, the addresses (V _n and H _o ), (V _n and H _o +11) , (V _n +8 and H _o ) and (V _n +
8 and H _o +11) is secured,
A logical value of 1 is stored at the address (V _n and H _o ). With the above steps, the setting of the specified point _P1 is completed. During the setting, the busy display 53 lights up. Similarly, switch 5
02 to 510, specified points P ₂ to P ₁₀ are set in the specified point position storage section 54 and specified point character storage section 55. On the other hand, in the scanning process of the television video signal, an output timing generator 210,
Addresses generated by the horizontal address generation section 211 and the vertical address generation section 212 are applied to the specified point position storage section 54 and the specified point character storage section 55. When the address specifies (V _n and H _o ), a logical value of 1 is simultaneously read from the specified point position storage section 54 and the specified point character storage section 55 and transmitted to the specified point control section 52 . The designated point control unit 52 determines that the address (V _n and H _o ) indicates the designated point by simultaneously outputting the logical value 1 from the designated point position storage unit 54 and the designated point character storage unit 55,
At the same time, the address of the memory section 204 (V _n and H
_o ), and then the address is scanned from (V _n and H _o +1) to (V _n and H _o +4), so that the relative digital signal is read out from the specified point position storage section 54. specified point
The relative digital signal held in the specified point digital signal storage section 56 is stored using code 0001 indicating P ₁ as an address. Further, when the address reaches (V _n +2 and H _o ), the specified point character storage unit 55 outputs a logical value of 1, so that the specified point control unit 52 identifies the specified point P ₁ on the monitor TV screen. Starts the operation of generating the character “1” to be
_n +2 and H _o +1) to (V _n +2 and H _o +
4) The code 0001 read out from the specified point position storage unit 54 and the characters read out from the specified point character storage unit 55 at addresses (V _n +2 and H _o +1) to (V _n +2 and H _o +3) The address 001 is transmitted to the character generation unit 215, and the character signal of the first line of the character "1" corresponding to the code 0001 is transmitted to the address (V _n +2
and H _o +4) to (V _n +2 and H _o +10)
Output to . address (V _n +2 and H _o +
11), the logical value 1 is obtained from the specified point character storage unit 55.
By reading out the specified point control section 52, the specified point control unit 52 ends the output operation of the first line of the character "1". Similarly, the addresses range from (V _n +3 and H _o ) to (V _n +3 and H _o +11) to (V _n +8 and H o
_o ) to (V _n +8 and H _o +11),
The designated point control unit 52 similarly executes the output operation for the second to seventh lines of the character "1", and displays the character "1" identifying the designated point P ₁ on the screen of the monitor television 3. let For the designated points P ₂ to P ₁₀ , each designated point P ₂ is read out from the memory unit 204 in the same process.
The relative digital signals corresponding to _P10 are stored at addresses 0010 to P10 in the specified point digital signal storage section 56.
1100, and characters " ₂ " to "A" identifying designated points P2 to _P10 are displayed on the monitor television screen. The relative digital signals corresponding to the designated points P ₁ to P ₁₀ stored in the designated point digital signal storage section 56 are generated by applying a predetermined address from the output timing generating section 210 , the horizontal address generating section 211 , and the vertical address generating section 212 . The signals are sequentially read out at the same time and added to the digital signal corresponding to the lower limit temperature LT by the adder 216, so that
The temperatures T ₁ to T ₁₀ at each specified point P ₁ to P ₁₀ are converted into digital signals, which are transmitted to the character generator 215 and displayed in numerical values at a predetermined position on the screen of the monitor television 3 as shown in FIG. be done. In Figure 6, a designated point is placed on the video area PA of the monitor TV screen.
The positions of P ₁ to P ₁₀ and identification characters "1" to "A" are displayed, and the temperature of each specified point P ₁ to P ₁₀ is displayed.
T ₁ (for example, 22.3°C) to T ₁₀ (for example, 31.2°C) are displayed numerically in order. Note that the specified point position storage section 5
4. Since the stored contents of the designated point character storage section 55 and the designated point digital signal storage section 56 are erased by operating the switch 51, the settings of the designated points _P1 to _P10 are canceled.

As is clear from the above description, according to this embodiment, the temperatures at any ten arbitrary locations within the video area PA of the television monitor 3 can be numerically displayed at predetermined positions within the monitor television screen.

Note that FIGS. 3 to 6 are only one embodiment of the present invention, and for example, the designated points P ₁ that can be set at the same time.
The number of P ₁₀ to P 10 is not limited to 10, and the effect of the present invention does not change even if the number is any plurality. In addition, the identification of designated points P ₁ to P ₁₀ is not limited to the letters "1" to "A", and the designated point temperature is determined in order from the designated point at the top of the video area PA.
Arranging T ₁ to T ₁₀ may also be considered, but the effects of the present invention will not change in such a case. In such cases, or when the total number of specified points is small,
It becomes unnecessary to display characters to identify designated points.

As described above, according to the present invention, in the digital memory type infrared imaging device, it is possible to numerically display the temperature at any plurality of arbitrary points in the image showing the temperature distribution of the object to be measured simultaneously on the monitor TV screen, and Temperature observation becomes even more effective.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing an example of the configuration of a conventional digital memory type infrared imaging device, FIG. 2 is a diagram showing an example of the screen layout of the monitor television in FIG. 1, and FIG.
4 is a diagram showing a digital memory type infrared imaging device according to an embodiment of the present invention, FIG. 4 is a diagram showing a designated point position storage section in FIG. 3, and FIG. 5 is a diagram showing a designated point character storage section in FIG. 3. The figure shown in Figure 6 is the third
It is a figure which shows an example of screen arrangement of the monitor television in a figure. In the figure, 1 is an infrared camera, 2 is a control unit,
3 is a monitor television, 4 is a joystick, 5 is a multi-point temperature display section, 201 is an analog-to-digital converter section, 202 is a calculation section, 203 is a display control section, 2
04 is a memory section, 205 is a digital-to-analog converter, 206 is a television video signal converter, 2
07 is an input timing conversion section, 208 is a position register, 209 is a memory control section, 210 is an output timing generation section, 211 is a horizontal address generation section, 212 is a vertical address generation section, 213 is an upper limit register, 214 is a lower limit register, 215 is a character generation section, 216 is an addition section, 217 is a spot register, 501 to 510 and 51 are switches,
52 is a specified point control unit, 53 is a busy display, 54 is a specified point position storage unit, 55 is a specified point character storage unit, 56
are specified point digital signal storage units, V ₁ , V _n to
V ₂₂₀ , H ₁ , H _o to H ₄₄₈ are addresses, PA is the image area, HL is the horizontal cursor, VL is the vertical cursor, P ₀ is the spot, P ₁ to P ₁₀ are the designated points, HT is the upper temperature limit, and LT is the Lower limit temperature, GS is gray scale,
ST is the spot temperature, T ₁ to T ₁₀ are the specified point temperatures,
shows.

Claims (1)

[Claims] 1. Converting an infrared video signal detected by an infrared camera from an object to be measured into a digital signal and storing it in a memory section, and converting the digital signal read from the memory section at a predetermined period into a television video signal and transmitting it to a monitor television. and when displaying an image showing the temperature distribution of the object to be measured, means for setting specified points at arbitrary plural positions in the image, and means for storing positional information of the specified points in the image. a means for storing character display information for distinguishing and displaying each designated point at a predetermined position on the monitor television screen; and extracting the digital signal at the designated point from the memory section to create temperature information;
What is claimed is: 1. A digital memory type infrared imaging device, further comprising means for transmitting information to a character generation unit, and simultaneously displays characters indicating the positions of the plurality of designated points and temperature values in the video image.