CA2072857A1 - Disaster preventing detection apparatus with thermal image detecting means - Google Patents
Disaster preventing detection apparatus with thermal image detecting meansInfo
- Publication number
- CA2072857A1 CA2072857A1 CA002072857A CA2072857A CA2072857A1 CA 2072857 A1 CA2072857 A1 CA 2072857A1 CA 002072857 A CA002072857 A CA 002072857A CA 2072857 A CA2072857 A CA 2072857A CA 2072857 A1 CA2072857 A1 CA 2072857A1
- Authority
- CA
- Canada
- Prior art keywords
- detecting means
- thermal image
- pyroelectric
- image detecting
- detection apparatus
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
- 238000001514 detection method Methods 0.000 title claims abstract description 50
- 230000002159 abnormal effect Effects 0.000 claims abstract description 19
- 239000010409 thin film Substances 0.000 claims description 6
- 238000010586 diagram Methods 0.000 description 6
- 239000000779 smoke Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 229910003781 PbTiO3 Inorganic materials 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000010408 film Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/30—Transforming light or analogous information into electric information
- H04N5/33—Transforming infrared radiation
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B17/00—Fire alarms; Alarms responsive to explosion
- G08B17/12—Actuation by presence of radiation or particles, e.g. of infrared radiation or of ions
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B17/00—Fire alarms; Alarms responsive to explosion
- G08B17/12—Actuation by presence of radiation or particles, e.g. of infrared radiation or of ions
- G08B17/125—Actuation by presence of radiation or particles, e.g. of infrared radiation or of ions by using a video camera to detect fire or smoke
Landscapes
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Fire-Detection Mechanisms (AREA)
- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
- Geophysics And Detection Of Objects (AREA)
- Emergency Alarm Devices (AREA)
- Radiation Pyrometers (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
An object of the present invention is to enable discovery of a fire at an early stage by detecting an abnormal heat source through a thermal image detecting means and to catch the abnormal heat source in the center of an image-processing frame by operating a video camera sequentially.
The thermal image detecting means 3 is fixed on a sustaining portion 2 and located to face a direc-tion of detection. A lens direction setting means 4 including a rotary mechanism is secured on the sustain-ing portion 2, and the video camera 1 is fixed on the lens direction setting means 4.
An object of the present invention is to enable discovery of a fire at an early stage by detecting an abnormal heat source through a thermal image detecting means and to catch the abnormal heat source in the center of an image-processing frame by operating a video camera sequentially.
The thermal image detecting means 3 is fixed on a sustaining portion 2 and located to face a direc-tion of detection. A lens direction setting means 4 including a rotary mechanism is secured on the sustain-ing portion 2, and the video camera 1 is fixed on the lens direction setting means 4.
Description
20728~7 Industrial Field of the Invention The present invention relates to a disaster preventing detection apparatus for use in a building.
Description of the Related Art Conventionally, disaster preventing detection apparatus for use in buildings are mainly of an infrared sensor type.
In a fire detection method, as shown in Fig.
l, in a darkened box formed with holes through which smoke ll enters, infrared rays emitted from a luminous element 8 and reflected on particles of the smoke 11 are detected by a light receiving portion 9. Thus, the existence of smoke is detected to thereby find out a fire.
As an intruder detection method, Fig. 2 shows - a method in which infrared rays emitted from a person's body are detected by a light receiving portion 9 so as to detect intrusion of the person, and Fig. 3 shows a method in which infrared rays are emitted from a luminous element 8, and if they are intercepted by a person's body or an object, intrusion of the person will be detected in accordance with a condition of the 20728~7 1 existence of infrared rays in a light receiving portion 9.
In the conventional example shown in Fig. 1, a fire is judged by detection of smoke so that it is difficult to discover a fire at an early stage.
In the conventional example shown in Fig. 2, the existence of a person's body can be detected but the position of the person's body can not. In the conventional example shown in Fig. 3, the position of the person's body can be detected only in a limited area, and this method is not suitable for detection in a wide range.
SUMMARY OF THE INVENTION
The present invention therefore provides an apparatus in which an abnormal state is detected by a thermal image detecting means comprising a group of pyroelectric-type thermal detection elements which produce the output only when the temperature of incident rays changes, and the detected state is compared with the previous state so as to obtain the position where the temperature change has taken place.
Also, in the present invention, a video camera connected to the outside and a sustaining portlon of the video camera are connected by a lens direction setting means including a rotary mechanism of two directions, and the thermal image detecting means is securely fixed on the sustaining portion and located to face a - . ' ' ' ' ' ` ' ', : i -, . . . - ,:
';' ' ": '' '. . . .
2072~7 1 direction of detection. The position of the detected abnormal state is judged by a heat source position detecting means, to thereby operate the above-mentioned lens direction setting means.
Further, in the present invention, a fire is judged and detected on the basis of a temperature of an abnormal-state area which is obtained through the thermal image detecting means.
Furthermore, in accordance with changes in a thermal image obtained through the thermal image detecting means, a person's body is detected, and the position of the detected person's body is determined.
Moreover, a signal is outputted in accordance with the existence of an abnormal state which is obtained through the thermal image detecting means.
Further, the pyroelectric-type thermal detection elements include a pyroelectric thin film.
Still more, the pyroelectric-type thermal detection elements are located in one dimension on a straight axis and include a rotational axis in parallel to or at a certain angle from the straight axis, so that the group of pyroelectric-type thermal detection elements will be rotated about the rotational axis to thereby obtain a two-dimensional image.
According to the invention, an abnormal state can be detected at an early stage by use of a thermal image, and its positional detection enables automatic operation of the video camera.
Description of the Related Art Conventionally, disaster preventing detection apparatus for use in buildings are mainly of an infrared sensor type.
In a fire detection method, as shown in Fig.
l, in a darkened box formed with holes through which smoke ll enters, infrared rays emitted from a luminous element 8 and reflected on particles of the smoke 11 are detected by a light receiving portion 9. Thus, the existence of smoke is detected to thereby find out a fire.
As an intruder detection method, Fig. 2 shows - a method in which infrared rays emitted from a person's body are detected by a light receiving portion 9 so as to detect intrusion of the person, and Fig. 3 shows a method in which infrared rays are emitted from a luminous element 8, and if they are intercepted by a person's body or an object, intrusion of the person will be detected in accordance with a condition of the 20728~7 1 existence of infrared rays in a light receiving portion 9.
In the conventional example shown in Fig. 1, a fire is judged by detection of smoke so that it is difficult to discover a fire at an early stage.
In the conventional example shown in Fig. 2, the existence of a person's body can be detected but the position of the person's body can not. In the conventional example shown in Fig. 3, the position of the person's body can be detected only in a limited area, and this method is not suitable for detection in a wide range.
SUMMARY OF THE INVENTION
The present invention therefore provides an apparatus in which an abnormal state is detected by a thermal image detecting means comprising a group of pyroelectric-type thermal detection elements which produce the output only when the temperature of incident rays changes, and the detected state is compared with the previous state so as to obtain the position where the temperature change has taken place.
Also, in the present invention, a video camera connected to the outside and a sustaining portlon of the video camera are connected by a lens direction setting means including a rotary mechanism of two directions, and the thermal image detecting means is securely fixed on the sustaining portion and located to face a - . ' ' ' ' ' ` ' ', : i -, . . . - ,:
';' ' ": '' '. . . .
2072~7 1 direction of detection. The position of the detected abnormal state is judged by a heat source position detecting means, to thereby operate the above-mentioned lens direction setting means.
Further, in the present invention, a fire is judged and detected on the basis of a temperature of an abnormal-state area which is obtained through the thermal image detecting means.
Furthermore, in accordance with changes in a thermal image obtained through the thermal image detecting means, a person's body is detected, and the position of the detected person's body is determined.
Moreover, a signal is outputted in accordance with the existence of an abnormal state which is obtained through the thermal image detecting means.
Further, the pyroelectric-type thermal detection elements include a pyroelectric thin film.
Still more, the pyroelectric-type thermal detection elements are located in one dimension on a straight axis and include a rotational axis in parallel to or at a certain angle from the straight axis, so that the group of pyroelectric-type thermal detection elements will be rotated about the rotational axis to thereby obtain a two-dimensional image.
According to the invention, an abnormal state can be detected at an early stage by use of a thermal image, and its positional detection enables automatic operation of the video camera.
2~72857 Fig. 1 is a schematic structural view of a conventional fire detection apparatus;
Fig. 2 is a schematic structural view of a 'i conventional intruder detection apparatus lof a light receiving type);
Fig. 3 is a schematic structural view of a conventional intruder detection apparatus (of a light intercepting type);
Fig. 4 is a structural view of a disaster preventing detection apparatus according to one embodiment of the present invention;
Fig. 5 is a block diagram of the disaster preventing detection apparatus in Fig. 4;
Figs. 6A and 6B are diagrams for explaining the function of the apparatus in Fig. 4;
Figs. 7A and 7B are structural views showing one embodiment of a thermal image detecting means in the apparatus of Fig. 4; and Figs. 8A and 8B are diagrams for explaining the mechanism to obtain a thermal image by use of a group of pyroelectric-type thermal detection elements.
DETAILED DESCRIPTION OF THE INVENTION
The preferred embodiments of the present invention will be hereinafter described with reference to Figs. 4 to 8.
2~72857 1 Fig 4 shows application of one embodiment of the invention.
In the figure, reference numeral 1 denotes a video camera; 2 denotes a sustaining portion; 3 denotes a thermal image detecting means; and 4 denotes a lens direction setting means including a rotary mechanism of two directions, i.e., horizontal and vertical directions.
The thermal image detecting means 3 is attached to the sustaining portion 2 and located to face a direction of detection in order to detect the existence and position of an abnormal heat source and to control the lens direction setting means 4 in a manner that the video camera 1 will be directed toward the abnormal heat source.
A plurality of pyroelectric-type thermal detection elements in a group are provided in the thermal image detecting means 3. In order to measure temperatures without contacting with an object, a 20 quantum-type infrared sensor, an infrared CCD or a thermal-type infrared sensor is employed. The quantum-type infrared sensor and the infrared CCD are highly sensitive and quick in response. However, they must be cooled (at about -100 to -200C) and are not suitable 25 for domestic use. On the other hand, the thermal-type infrared sensor is characterized in that it does not require cooling although it has a relatively low sensitivity and is slow in response. In the thermal _ 5 _ ~ . -' 2072~57 1 image detecting means 3, pyroelectric effects of thermal-type infrared sensors are utilized.
Fig. 5 is a block diagram of a disaster preventing detection apparatus according to the invention.
In addition to the thermal image detecting means 3, the sustaining portion 2 includes an abnormal heat source ud ing means, an abnormal heat source Je~e~j~6 /~cL~O~ ~ ~,e~f sO~ ce ~oO~,~Jir~ ~7e~o~
~ position ~dgi~g meansfland an alarm signal transmitting 10 means.
First, the thermal image detecting means 3 detects a thermal image of a person's body, a fire and so forth. Next, the abnormal heat source j~ ging means ~e~e and the abnormal heat source position ~idg~*g means lS judge an abnormal heat source (an intruder, a fire or the like) and its position~, And, the lens direction setting means is operated to control the direction of a lens in the video camera.
Figs. 6A and 6B are diagrams for explaining 2~ the function of the disaster preventing detection apparatus according to the embodiment of the invention.
Each of the diagrams shows a thermal image and a visible image and places one upon another.
As indicated by a thermal image in Figs. 6A
25 and 6B, when the existence of an abnormal heat source which has not existed in the previous stage is confirmed, a signal is outputted by the alarm signal ; transmitting means.
* ~ ~e~ ze ~ e~ O~ e~ ece ~0O,~ f JD~ ~y ~e ~e~ ~ ~o,~
2~728~7 1 Referring to Fig. 6B, the abnormal heat source judging means judges a heat source as a fire when the temperature of the heat source is sufficiently high.
Referring now to Fig. 6A, when the temperature of a heat source is not sufficiently high, the abnormal heat source position judging means determines the position of the heat source, and the lens direction setting means 4 controls the lens direction of the video camera.
Figs. 7A and 7B are structural views showing one embodiment of the thermal image detecting means 3 according to the invention. Reference numerals 6a to 6e denote pyroelectric-type thermal detection elements; 6 denotes a group of the pyroelectric-type thermal detection elements; and 7 denotes a rotational axis.
Fig. 7A illustrates a condition in which the rotational axis 7 extends in parallel to the pyroelectric-type thermal detection elements group 6, and Fig. 7B
illustrates a condition in which the rotational axis 7 inclines at an angle ~ from the pyroelectric-type thermal detection elements group 6. The angle ~ is determined in accordance with the structure of the sustaining portion 2 to which the thermal image detecting means 3 is attached and the preset angle of detecting field of view.
Next, referring to Figs. 8A and 8B, there will be described the mechanism to obtain a thermal image by use of the pyroelectric-type thermal detection elements group 6. Fig. 8A illustrates a three-dimensional , 2072~7 1 visibility angle of a thermal image to be detected, and Fig. 8B illustrates the detected thermal image. The pyroelectric-type thermal detection elements group 6 includes five elements which cover the respective sections of the visibility angle which is divided into five in the vertical direction.
The pyroelectric-type thermal detection elements group 6 is used in combination with an optical lens. The preset visibility angle is narrow in the horizontal direction so that the horizontal visibility angle is moved along with rotation of the rotating axis 7. Every time the horizontal visibility angle is moved, the pyroelectric-type thermal detection elements group 6 measures the temperature, thereby obtaining the two-dimensional thermal image shown in Fig. 8B.
A pyroelectric-type infrared sensor in general use is of a so-called bulk shape and includes a sintered material of a pyroelectric thick film. However, the bulk-shape sensor involves a problem that the thermal time constant cannot be decreased and thereby the bulk-shape sensor is slow in response. Therefore, a pyroelectric-type thermal detection element including a pyroelectric thin film of PbTiO3 or the like is employed so that the time for response can be made about 1/10 of 25 that of the bulk-shape sensor.
By using pyroelectric-type thermal detection elements including such a pyroelectric thin film in order to shorten the response time, movement or the like ..,~
2072~7 l of an intruder can be detected highly accurately. Also, with the pyroelectric thin film, the elements can be miniaturized.
According to the present invention, as clearly described heretofore, an abnormal state can be detected at an early stage through a thermal image which i5 obtained by the group of pyroelectric-type thermal detection elements, and also, the position of the abnormal state can be determined so that an intruder can be caught in the center of the image-processing frame.
Moreover, according to the invention, the group of pyroelectric-type thermal detection elements located in one dimension is rotated to thereby detect a thermal image with a relatively simple structure.
Furthermore, the group of pyroelectric-type thermal detection elements including the pyroelectric thin film is used so as to produce effects such as improving the thermal image response speed and miniaturizing the elements.
,, _ g _ .
,.~ ,-.. . .
:
.
Fig. 2 is a schematic structural view of a 'i conventional intruder detection apparatus lof a light receiving type);
Fig. 3 is a schematic structural view of a conventional intruder detection apparatus (of a light intercepting type);
Fig. 4 is a structural view of a disaster preventing detection apparatus according to one embodiment of the present invention;
Fig. 5 is a block diagram of the disaster preventing detection apparatus in Fig. 4;
Figs. 6A and 6B are diagrams for explaining the function of the apparatus in Fig. 4;
Figs. 7A and 7B are structural views showing one embodiment of a thermal image detecting means in the apparatus of Fig. 4; and Figs. 8A and 8B are diagrams for explaining the mechanism to obtain a thermal image by use of a group of pyroelectric-type thermal detection elements.
DETAILED DESCRIPTION OF THE INVENTION
The preferred embodiments of the present invention will be hereinafter described with reference to Figs. 4 to 8.
2~72857 1 Fig 4 shows application of one embodiment of the invention.
In the figure, reference numeral 1 denotes a video camera; 2 denotes a sustaining portion; 3 denotes a thermal image detecting means; and 4 denotes a lens direction setting means including a rotary mechanism of two directions, i.e., horizontal and vertical directions.
The thermal image detecting means 3 is attached to the sustaining portion 2 and located to face a direction of detection in order to detect the existence and position of an abnormal heat source and to control the lens direction setting means 4 in a manner that the video camera 1 will be directed toward the abnormal heat source.
A plurality of pyroelectric-type thermal detection elements in a group are provided in the thermal image detecting means 3. In order to measure temperatures without contacting with an object, a 20 quantum-type infrared sensor, an infrared CCD or a thermal-type infrared sensor is employed. The quantum-type infrared sensor and the infrared CCD are highly sensitive and quick in response. However, they must be cooled (at about -100 to -200C) and are not suitable 25 for domestic use. On the other hand, the thermal-type infrared sensor is characterized in that it does not require cooling although it has a relatively low sensitivity and is slow in response. In the thermal _ 5 _ ~ . -' 2072~57 1 image detecting means 3, pyroelectric effects of thermal-type infrared sensors are utilized.
Fig. 5 is a block diagram of a disaster preventing detection apparatus according to the invention.
In addition to the thermal image detecting means 3, the sustaining portion 2 includes an abnormal heat source ud ing means, an abnormal heat source Je~e~j~6 /~cL~O~ ~ ~,e~f sO~ ce ~oO~,~Jir~ ~7e~o~
~ position ~dgi~g meansfland an alarm signal transmitting 10 means.
First, the thermal image detecting means 3 detects a thermal image of a person's body, a fire and so forth. Next, the abnormal heat source j~ ging means ~e~e and the abnormal heat source position ~idg~*g means lS judge an abnormal heat source (an intruder, a fire or the like) and its position~, And, the lens direction setting means is operated to control the direction of a lens in the video camera.
Figs. 6A and 6B are diagrams for explaining 2~ the function of the disaster preventing detection apparatus according to the embodiment of the invention.
Each of the diagrams shows a thermal image and a visible image and places one upon another.
As indicated by a thermal image in Figs. 6A
25 and 6B, when the existence of an abnormal heat source which has not existed in the previous stage is confirmed, a signal is outputted by the alarm signal ; transmitting means.
* ~ ~e~ ze ~ e~ O~ e~ ece ~0O,~ f JD~ ~y ~e ~e~ ~ ~o,~
2~728~7 1 Referring to Fig. 6B, the abnormal heat source judging means judges a heat source as a fire when the temperature of the heat source is sufficiently high.
Referring now to Fig. 6A, when the temperature of a heat source is not sufficiently high, the abnormal heat source position judging means determines the position of the heat source, and the lens direction setting means 4 controls the lens direction of the video camera.
Figs. 7A and 7B are structural views showing one embodiment of the thermal image detecting means 3 according to the invention. Reference numerals 6a to 6e denote pyroelectric-type thermal detection elements; 6 denotes a group of the pyroelectric-type thermal detection elements; and 7 denotes a rotational axis.
Fig. 7A illustrates a condition in which the rotational axis 7 extends in parallel to the pyroelectric-type thermal detection elements group 6, and Fig. 7B
illustrates a condition in which the rotational axis 7 inclines at an angle ~ from the pyroelectric-type thermal detection elements group 6. The angle ~ is determined in accordance with the structure of the sustaining portion 2 to which the thermal image detecting means 3 is attached and the preset angle of detecting field of view.
Next, referring to Figs. 8A and 8B, there will be described the mechanism to obtain a thermal image by use of the pyroelectric-type thermal detection elements group 6. Fig. 8A illustrates a three-dimensional , 2072~7 1 visibility angle of a thermal image to be detected, and Fig. 8B illustrates the detected thermal image. The pyroelectric-type thermal detection elements group 6 includes five elements which cover the respective sections of the visibility angle which is divided into five in the vertical direction.
The pyroelectric-type thermal detection elements group 6 is used in combination with an optical lens. The preset visibility angle is narrow in the horizontal direction so that the horizontal visibility angle is moved along with rotation of the rotating axis 7. Every time the horizontal visibility angle is moved, the pyroelectric-type thermal detection elements group 6 measures the temperature, thereby obtaining the two-dimensional thermal image shown in Fig. 8B.
A pyroelectric-type infrared sensor in general use is of a so-called bulk shape and includes a sintered material of a pyroelectric thick film. However, the bulk-shape sensor involves a problem that the thermal time constant cannot be decreased and thereby the bulk-shape sensor is slow in response. Therefore, a pyroelectric-type thermal detection element including a pyroelectric thin film of PbTiO3 or the like is employed so that the time for response can be made about 1/10 of 25 that of the bulk-shape sensor.
By using pyroelectric-type thermal detection elements including such a pyroelectric thin film in order to shorten the response time, movement or the like ..,~
2072~7 l of an intruder can be detected highly accurately. Also, with the pyroelectric thin film, the elements can be miniaturized.
According to the present invention, as clearly described heretofore, an abnormal state can be detected at an early stage through a thermal image which i5 obtained by the group of pyroelectric-type thermal detection elements, and also, the position of the abnormal state can be determined so that an intruder can be caught in the center of the image-processing frame.
Moreover, according to the invention, the group of pyroelectric-type thermal detection elements located in one dimension is rotated to thereby detect a thermal image with a relatively simple structure.
Furthermore, the group of pyroelectric-type thermal detection elements including the pyroelectric thin film is used so as to produce effects such as improving the thermal image response speed and miniaturizing the elements.
,, _ g _ .
,.~ ,-.. . .
:
.
Claims (7)
1. A disaster preventing detection apparatus comprising a thermal image detecting means which has a plurality of pyroelectric-type thermal detection elements in a group.
2. A disaster preventing detection apparatus wherein a video camera and a sustaining portion are connected by a rotary mechanism of at most two directions, and a thermal image detecting means comprising a plurality of pyroelectric-type thermal detection elements in a group is securely fixed on said sustaining portion and located to face a direction of detection.
3. A disaster preventing detection apparatus according to Claim 1 or 2, wherein a fire is detected by said thermal image detecting means.
4. A disaster preventing detection apparatus according to any of Claims 1 to 3, wherein a person's body is detected by said thermal image detecting means, an abnormal heat source position detecting means, and a heat source position memory.
5. A disaster preventing detection apparatus according to any of Claims 1 to 4, which the apparatus further includes an alarm signal transmitting means.
6. A disaster preventing detection apparatus according to Claim 1 or 2, wherein the pyroelectric-type thermal detection elements of said thermal image detecting means include a pyroelectric thin film.
7. A disaster preventing detection apparatus according to Claim 1 or 2, wherein the pyroelectric-type thermal detection elements of said thermal image detecting means are located in one dimension on a straight axis and include a rotational axis in parallel to or at a certain angle from said straight axis, so that said pyroelectric-type thermal detection elements are rotated about said rotational axis to thereby obtain a two-dimensional image.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3165425A JPH0510825A (en) | 1991-07-05 | 1991-07-05 | Disaster detecting device with thermal image detecting means |
| JP03-165425 | 1991-07-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2072857A1 true CA2072857A1 (en) | 1993-01-06 |
Family
ID=15812183
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002072857A Abandoned CA2072857A1 (en) | 1991-07-05 | 1992-06-30 | Disaster preventing detection apparatus with thermal image detecting means |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JPH0510825A (en) |
| KR (1) | KR960015008B1 (en) |
| CA (1) | CA2072857A1 (en) |
| DE (1) | DE4221833C2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112435436A (en) * | 2020-11-03 | 2021-03-02 | 国网智能科技股份有限公司 | Multi-dimensional linkage rechecking method, device and system for monitoring fire of transformer substation |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4435336A1 (en) * | 1994-10-01 | 1996-04-11 | Friedrich Brueck | System for controlling outdoor video monitoring installation |
| DE19744635B4 (en) * | 1997-10-09 | 2006-02-09 | Klaus Dyballa | Infrared detectors |
| KR20170032657A (en) * | 2015-09-15 | 2017-03-23 | 엘지이노텍 주식회사 | Door bell |
| CN106225931A (en) * | 2016-08-02 | 2016-12-14 | 北京殷图网联科技股份有限公司 | The long-range method for inspecting of substation equipment based on infrared point thermometric The Cloud Terrace and device |
| CN109272701B (en) * | 2018-10-27 | 2024-04-16 | 上海国际机场股份有限公司 | Fire detector with control |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57124981A (en) * | 1981-01-27 | 1982-08-04 | Mitsubishi Electric Corp | Monitor for infrared ray |
| DE3205394A1 (en) * | 1982-02-16 | 1983-08-25 | Günter Dipl.-Phys. Dr. 7000 Stuttgart Haag | Optoelectronic area security device |
| JPS6115300A (en) * | 1984-06-29 | 1986-01-23 | ホーチキ株式会社 | Fire alarm |
| JPS61178621A (en) * | 1985-02-04 | 1986-08-11 | Hochiki Corp | Flame detector |
| JPS63163698A (en) * | 1986-12-26 | 1988-07-07 | ホーチキ株式会社 | Scattered light type smoke sensor |
| DE3710265A1 (en) * | 1987-03-28 | 1988-10-13 | Licentia Gmbh | System for the early detection of fires covering large areas |
| FR2643173A1 (en) * | 1988-11-04 | 1990-08-17 | Argamakoff Aleksy | Automatic detector of break-in or fire at great distance |
| US4910593A (en) * | 1989-04-14 | 1990-03-20 | Entech Engineering, Inc. | System for geological defect detection utilizing composite video-infrared thermography |
| CH681574A5 (en) * | 1991-03-01 | 1993-04-15 | Cerberus Ag |
-
1991
- 1991-07-05 JP JP3165425A patent/JPH0510825A/en active Pending
-
1992
- 1992-06-30 CA CA002072857A patent/CA2072857A1/en not_active Abandoned
- 1992-07-03 KR KR1019920011849A patent/KR960015008B1/en not_active IP Right Cessation
- 1992-07-03 DE DE4221833A patent/DE4221833C2/en not_active Revoked
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112435436A (en) * | 2020-11-03 | 2021-03-02 | 国网智能科技股份有限公司 | Multi-dimensional linkage rechecking method, device and system for monitoring fire of transformer substation |
Also Published As
| Publication number | Publication date |
|---|---|
| DE4221833A1 (en) | 1993-01-14 |
| KR930002989A (en) | 1993-02-23 |
| DE4221833C2 (en) | 1994-01-27 |
| KR960015008B1 (en) | 1996-10-23 |
| JPH0510825A (en) | 1993-01-19 |
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