JP3176350U - Video recorder for hydrogen station - Google Patents

Abstract

[PROBLEMS] To provide a recording device for a hydrogen station for continuous recording, which records the situation of the site before hydrogen leaks and has durability enough to prevent loss of stored video data against impact and heat caused by hydrogen explosion. provide.
A hydrogen station recording apparatus (2) comprising a video recording unit main body (3) and a hydrogen leak detection unit (19) in which an imaging mechanism is stored in an explosion-proof case is provided. According to the present invention, the video data is always stored in the hydrogen station, and when the hydrogen leak occurs, the video data storage is stopped, so that the video data immediately before and immediately after the disaster is left behind. It can be used for elucidation.
[Selection] Figure 4

Description

  The present invention relates to a recording device for a hydrogen station that records a video of the field at the hydrogen station.

  In recent years, hydrogen energy has attracted attention as the next generation of clean energy, and storage facilities for hydrogen gas, a fuel cell manufacturing facility, or equipment used in these facilities (hereinafter referred to as facilities or equipment). )) Is being developed. However, when hydrogen is mixed with oxygen, it tends to ignite and explode, and if it explodes, there is a risk of a major accident, so a device for detecting leakage of hydrogen has been developed.

JP2009-133782A

  However, although the prior art can detect the hydrogen leak itself, it has not been possible to record the situation at the site prior to the hydrogen leak.

Therefore, as a means for solving the above problems, a recording apparatus for a hydrogen station according to the utility model of the present application is for continuous recording with durability that does not lose the stored video data even under the impact of hydrogen explosion or heat. A recording device for a hydrogen station,
A camera unit that captures a video to be shot, an operation command to the camera unit, a video data conversion process of the video captured by the camera unit, and a command to save or retrieve video data, and a command from the microcomputer unit A memory interface unit that performs transmission processing and extraction processing of video data, a memory unit that stores video data transmitted from the memory interface, the camera unit, the microcomputer unit, the memory interface unit, and the memory unit Is stored in an explosion-proof case, and a video recording unit main body having a structure in which a transparent plate is provided on a video capture window formed on a wall surface facing the lens of the camera unit of the explosion-proof case, and the video recording A hydrogen sensor unit that detects hydrogen leaking from the hydrogen station or an irradiation laser -A Raman scattered light detection unit that detects leaked hydrogen by detecting Raman scattered light obtained from hydrogen irradiated with light, and when the hydrogen sensor unit or the Raman scattered light detection unit detects leakage of hydrogen, A hydrogen leak detection unit that transmits an operation stop signal to the microcomputer unit, and the microcomputer unit receives an operation stop signal from the hydrogen leak detection unit, and overwrites an image data operation command to the recording unit and an image data overwriting to the recording unit. The prohibition command is transmitted.

  The camera unit has a function capable of taking a video of a person such as a worker taken in from a lens and a facility or equipment existing around the person as a moving image.

  The microcomputer unit determines the conditions of the imaging operation of the camera unit and instructs the camera unit to operate based on the conditions, and also performs video data processing of the video captured by the camera unit, Command to save in memory part. On the other hand, a command for taking out the video data stored in the memory unit is also issued.

  Video data ordered to be stored or retrieved by a command from the microcomputer unit is transmitted to the memory unit via the memory interface unit, and is read out from the memory unit. It is preferable that the memory unit is detachably attached from the memory interface unit. Since the memory unit is detachable from the memory interface unit, it is possible to carry data by taking out only the memory unit for taking out the video data, and it is not necessary to move the entire recording device for the hydrogen station or the video recording unit main body. . Further, by replacing the memory unit with another memory unit, it is possible to continue storing video data even after the memory unit is taken out.

  Note that the video captured by the camera unit includes a video that is configured by continuously recording still images taken at regular time intervals, and the hydrogen station recording apparatus according to the utility model of the present application includes: It is also preferable that image data of a photographed still image can be output by a command from the microcomputer unit.

  In addition, the camera unit, the microcomputer unit, the memory interface unit, and the memory unit are stored in an explosion-proof case, and are stored against an impact or heat caused by an explosion accident occurring in a hydrogen station. Can avoid data loss. In addition, the explosion-proof case is provided with a transparent plate at the facing portion of the lens of the camera unit, and the camera unit can take an image of the external state through the transparent plate.

  In addition, a hydrogen leak detection unit equipped with a hydrogen sensor unit or a Raman scattered light detection unit for detecting leaked hydrogen by detecting Raman scattered light obtained from hydrogen irradiated with irradiation laser light outside the explosion-proof case When the hydrogen sensor unit or the Raman scattered light detection unit detects hydrogen leaked from facilities or equipment provided in the hydrogen station, an operation stop signal is transmitted to the microcomputer unit. The microcomputer unit receives an operation stop signal from the hydrogen leak detection unit and instructs the camera unit to stop the imaging operation, and stops overwriting and saving of video data by imaging after the operation stop signal is received. Here, the operation stop signal is transmitted so that after the hydrogen leak detection unit detects hydrogen leaked, the camera unit captures the video after the hydrogen leak so that the video at the time of hydrogen leak is not overwritten. It is sent with a delay. By transmitting the operation stop signal in this way, it is possible to record the movement of a person at the hydrogen station and the state of facilities or equipment at the time of a disaster such as an explosion or fire due to hydrogen leakage and immediately after the disaster occurs. The transmission / reception means for the operation stop signal is preferable because the transmission / reception means can be surely transmitted / received by a wired cable with an explosion-proof measure. However, the transmission / reception means may be performed wirelessly. If the transmission / reception means for the operation stop signal is performed wirelessly, the area of the facility through which the current flows in the hydrogen station can be reduced, so that it is easy to take an explosion-proof measure and the installation cost of the device according to the present invention can be reduced. Because.

  Here, the hydrogen sensor unit is a sensor including a thin film type thin film sensor, and is formed on a sensing layer made of a magnesium alloy formed on a substrate transparent to detection light, and formed on the sensing layer. And a catalyst layer made of a palladium layer or a platinum layer. The thin film sensor has a high reflectivity with respect to light, particularly visible light, in an atmosphere in which hydrogen is not present, but has a characteristic that the reflectivity with respect to light is lowered when the sensing layer reacts with hydrogen. In addition, a light-emitting element is provided inside the hydrogen sensor unit, and the light received through the thin-film sensor of the detection light emitted from the light-emitting element is received by the light-receiving element that is also provided inside the hydrogen sensor unit, and the intensity change of the light It is desirable that hydrogen can be detected by determining the above. The hydrogen sensor unit having such a configuration can provide an advantage that hydrogen can be detected without direct contact between the current and hydrogen.

  The hydrogen sensor unit will be described in more detail. The hydrogen sensor unit includes a light emitting element that emits detection light, a light receiving element that receives detection light from the light emitting element, a thin film sensor, and a light receiving element that receives the detection light. A signal amplifying unit for amplifying the electrical signal from the signal, a discriminating unit for discriminating a change in the intensity of the electric signal obtained from the signal amplifying unit, and an alarm unit for issuing an alarm by receiving an alarm signal from the discriminating unit. The light emitting element and the light receiving element are arranged opposite to each other and spaced apart from each other, and the thin film sensor is disposed on a line segment connecting the light emitting element and the light receiving element and spaced from each element, and the thin film sensor The sensor includes a sensing layer made of a magnesium alloy formed on a substrate transparent to detection light, and a catalyst layer made of a palladium layer or a platinum layer formed on the sensing layer. It is preferably characterized in that one was. The light emitting element is disposed away from the thin film sensor in a predetermined angle direction from the vertical line of the thin film sensor, and the light receiving element is disposed away from the thin film sensor in a direction in which detection light incident on the thin film sensor is reflected. May be.

  The magnesium alloy is more preferably a magnesium-nickel alloy, or a magnesium-niobium alloy or a magnesium-titanium alloy is also preferable.

  In addition, the Raman scattered light detection unit senses Raman scattered light scattered from hydrogen molecules leaked by the laser oscillation unit capable of emitting laser light and the laser light emitted from the laser oscillation unit. A sensing unit, and a computing unit for subtracting atmospheric data of Raman scattered light obtained from normal atmosphere from signal data detected by the Raman sensing unit, and hydrogen gas leakage from the computed data. It is preferable to include a recognition unit that recognizes the occurrence and a warning unit that performs a warning when receiving a warning signal from the recognition unit. In addition, the signal with the same function may be sufficient as the said alerting signal and the said alarm issuing signal, and the said alerting part and the said alarm part may each have the same function.

  As a laser used in the laser oscillation unit, a semiconductor laser, an argon ion laser, a helium neon laser, a helium cadmium laser, a sapphire laser, or a YAG laser can be used. The laser light emitted from the laser oscillator to the hydrogen gas leakage monitoring region is approximately 406 nm, approximately 635 nm, approximately 670 nm, or approximately 785 nm when using a semiconductor laser, and approximately 488 nm or approximately when using an argon ion laser. 514 nm, approximately 633 nm when using a helium neon laser, approximately 442 nm or approximately 325 nm when using a helium cadmium laser, approximately 800 nm when using a sapphire laser, approximately 266 nm when using a YAG laser, approximately 355 nm, Alternatively, it is preferable to use laser light having a wavelength of approximately 532 nm.

  By using the Raman scattered light detection unit, hydrogen leakage can be determined immediately when hydrogen gas leaks without allowing hydrogen gas to reach the hydrogen sensor unit directly. It can be detected sooner.

  According to the present invention, it is possible to record the movement of a person at the hydrogen station and the state of facilities or equipment at the time of a disaster such as an explosion or fire due to hydrogen leakage and immediately after the disaster occurs, and investigate the cause of the disaster. Can keep important information until after the disaster converges.

2 is a view showing a longitudinal section of a video recording unit main body 3 and an information transmission cable 18. FIG. FIG. 2 is a schematic view of a hydrogen leak detection unit 19 installed in the hydrogen station 1, a part of a transmission pipe 25, and a longitudinal section of an information transmission cable 18. FIG. 2 is a diagram showing an outline of the structure of a hydrogen sensor unit 22 FIG. 2 is a diagram showing an example of a state in which the hydrogen station recording apparatus 2 according to the present invention is installed in the hydrogen station 1 as viewed from obliquely above the hydrogen station 1.

  Hereinafter, embodiments according to the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a longitudinal sectional view of the video recording unit main body 3 of the hydrogen station recording apparatus 2 provided in the hydrogen station 1, and is for explaining the outline of the internal structure of the video recording unit main body 3. is there.

  As shown in FIG. 1, the video recording unit body 3 has an explosion-proof case 4 at the outer shell, and the video recording unit is protected from the impact and heat caused by an explosion or fire caused by hydrogen leakage generated at the hydrogen station 1. The main body 3 plays a role of protecting the accumulated video data.

  The interior of the explosion-proof case 4 is hollow, and an imaging mechanism 6 for storing video data is stored by using the hollow as the storage space 5. The imaging mechanism 6 includes a substrate 8 on a substrate fixing unit 7 fixed to the inner floor surface of the storage space 5, a microcomputer unit 9, a camera unit 10, a memory interface unit 11, and a memory unit formed on the substrate 8. 12 is provided. Here, the microcomputer unit 9, the camera unit 10, the memory interface unit 11, and the memory unit 12 are electrically connected by an electric conduction unit formed on the substrate 8, and can transmit / receive electronic information to / from each other.

  The camera unit 10 is provided with a lens 13 for capturing an external video of the video recording unit main body 3. On the wall surface of the explosion-proof case 4 facing the lens 13, an image capturing window 14 is formed through the outside of the explosion-proof case 4 and the storage space 5. A transparent plate 15 is attached to the inner edge of the video capture window 14. Thereby, the light outside the video recording unit main body 3 can be taken into the lens 13, and the camera unit 10 can capture a video around the outside of the video recording unit main body 3.

  A support column 16 is attached to the lower part of the explosion-proof case 4 and is installed on the floor surface 17 of the hydrogen station. An information transmission cable 18 extends from the support 16 and is connected to a hydrogen leak detection unit 19. The information transmission cable 18 is preferably drawn directly from the explosion-proof case 4.

  The information transmission cable 18 is covered with an information transmission line 21 by an explosion-proof cable cover 20, and the information transmission line 21 is not exposed to the atmosphere of the hydrogen leak detection unit hydrogen station 1 and the microcomputer unit 9 and the hydrogen leak detection unit 19. Is electrically connected to the hydrogen sensor unit 22.

  FIG. 2 shows a hydrogen leak detection provided with a hydrogen storage tank 23 and a hydrogen sensor unit 22 installed in the vicinity of the hydrogen storage tank 23 as an example of a facility or equipment for handling hydrogen provided in the hydrogen station 1. Part 19 is shown.

  A transmission tube 25 is connected to a base 24 provided at the lower part of the hydrogen leak detection unit 19, and an information transmission cable 18 extending from the video recording unit main body 3 and coupled to the transmission tube 25 is connected to the transmission tube 25. Yes. The information transmission line 21 is electrically connected from the information transmission cable 18 to the hydrogen sensor unit 22 installed in the hydrogen leakage detection unit 19 through the transmission pipe 25 and the base 24. The base 24 does not need to be made of metal, and is preferably made of resin. This is because the risk of electric leakage from the hydrogen leak detector 19 to the space in the hydrogen station 1 can be avoided.

  The hydrogen sensor unit 22 includes a thin film type thin film sensor 26 as shown in FIG. 3, and includes a sensing layer 28 made of a magnesium alloy formed on a substrate 27 transparent to the detection light L, A catalyst layer 29 made of a palladium layer or a platinum layer formed on the sensing layer 28 is provided. The thin film sensor 26 has a high reflectance with respect to the detection light L in an atmosphere without hydrogen, and the reflectance of the light changes due to the sensing layer 28 reacting with hydrogen, and the reflectance with respect to the detection light L decreases. To do. In the present embodiment, a light emitting element 30 that emits the detection light L and a light receiving element 31 that receives the detection light L through the thin film sensor are provided at positions spaced from the front surface of the thin film sensor 26. A reflector 32 provided in close contact with the surface opposite to the layer 28 is provided in close contact. The detection light L emitted from the light emitting element 30 is reflected by the sensing layer 28 in an atmosphere without hydrogen. On the other hand, when the sensing layer 28 and hydrogen react due to hydrogen leakage, the detection light L passes through the sensing layer 28. The light is reflected by the reflecting plate 32 and enters the light receiving element 31. Therefore, the reflection surface of the detection light L changes depending on the presence or absence of hydrogen, and the optical path changes, so that the intensity of the detection light L incident on the light receiving element 31 changes. In this embodiment, the light emitting element 30 uses a light emitting diode that emits detection light L having a wavelength of 670 nm, and the sensing layer 28 uses a magnesium-nickel alloy.

  The detection light L sensed by the light receiving element 31 is converted into an electric signal, amplified by the signal amplifying unit 33, the change in the intensity of the detection light L is discriminated by the discrimination unit 34, and hydrogen is detected by the hydrogen sensor unit 22. Is determined. When the determination unit 34 determines that hydrogen is present, an alarm 36 is issued from the alarm unit 35. The alarm unit 35 may be a speaker that notifies the alarm 36 by sound, or may be constituted by a light emitter that notifies by light.

  A plurality of clasps 37 are received on the back surface of the hydrogen leak detection unit 19 so as to protrude in the side surface direction, and the hydrogen leak detection unit 19 is attached to a wall or the like through a screw 38 in a fixing hole formed in the clasp 37. Even if it is configured to be able to be fixed to, it is preferable.

  A lid 39 for tank cleaning work is attached to the upper part of the hydrogen storage tank 23, and the end of a pipe 40 used for transporting hydrogen is joined to the side wall of the hydrogen storage tank 23. A valve 41 for adjusting the hydrogen flow rate is attached to the pipe 40.

  The leakage of hydrogen is caused by a lid joint 42 where the hydrogen storage tank 23 and the lid 39 are joined, a pipe joint 43 where the hydrogen storage tank 23 and the pipe 40 are joined, a valve 41, and a bent part of the pipe 40. 44 and so on. When hydrogen leakage occurs from these places, the hydrogen sensor 22 of the hydrogen leakage detector 19 senses hydrogen, so that an operation stop signal is issued from the hydrogen leak detector 19 to the microcomputer unit 9, The microcomputer unit 9 that has received the stop signal issues a command to the camera unit 10 to stop the imaging operation.

  FIG. 4 shows an example of a state in which the recording apparatus 2 for the hydrogen station according to the present invention is installed in the hydrogen station 1 provided with the hydrogen storage tank 23 as viewed from above the hydrogen station 1 obliquely. In the hydrogen station 1, workers A and B of the hydrogen storage tank 23 are working.

  In the present embodiment, the video recording unit main bodies 3a and 3b are installed at diagonal positions on the lower right and upper left sides of the hydrogen storage tank 23, respectively. In addition, hydrogen leakage detectors 19a and 19b are installed on the right and left sides of the hydrogen storage tank 23, respectively. The video recording unit main bodies 3a and 3b and the hydrogen leak detection units 19a and 19b are connected to each other by an information transmission cable 18, and the video recording unit main bodies 3a and 3b are operated from either of the hydrogen leak detection units 19a and 19b. The network is formed so that it can be received. The hydrogen leakage detection units 19a and 19b may both be hydrogen sensor units or Raman scattered light detection units, and either one may be a hydrogen sensor unit and the other may be a Raman scattered light. It may be a detection unit.

  In the present embodiment, the video recording unit main bodies 3a and 3b always record the operation state of the hydrogen storage tank 23 and the workers A and B as video data as a moving image, respectively. The new video data is overwritten and recording is continued.

  At this time, when hydrogen leakage occurs from the lid joint portion 42, the pipe joint portion 43, the valve 41, the bent portion 44 of the pipe 40, etc., the hydrogen leak detector 19a or the hydrogen leak detector 19b detects hydrogen, An operation stop signal is issued.

  At this time, even if the hydrogen leak detection unit 19a or the hydrogen leak detection unit 19b has detected hydrogen, an operation stop signal is displayed along the arrow shown along the information transmission cable 18 in the video recording unit main body 3a, And 3b are transmitted to the microcomputer unit 9 and the imaging operation by the camera unit 10 is stopped. Thereby, overwriting of the video data is avoided, and the state in the hydrogen storage tank 23, the workers A and B, and the hydrogen station 1 before the occurrence of hydrogen leakage is stored as a video.

  Furthermore, even if a disaster such as an explosion or fire occurs in the hydrogen station 1, the explosion-proof case 4 protects the image pickup mechanism 6 stored in the storage space 5 from impact or heat. You can keep it until the end of the disaster. Thereby, the state in the hydrogen station 1 immediately before the occurrence of hydrogen leakage can be commended later by the video data, which can be used for elucidating the cause of the hydrogen leakage occurrence.

  In the present embodiment, the camera unit 10 includes a visible light receiver that can capture a moving image of a person such as a worker and facilities or devices existing around the person.

DESCRIPTION OF SYMBOLS 1 Hydrogen station 2 Recording device 3 for hydrogen stations Video recording part main body 4 Explosion-proof case 5 Storage space 9 Microcomputer part 10 Camera part 11 Memory interface part 12 Memory part 13 Lens 14 Image taking-in window 15 Transparent board 18 Information transmission cable 19 Hydrogen leak Detection unit 22 Hydrogen sensor unit 23 Hydrogen storage tank

Claims (1)

A recording device for a hydrogen station for continuous recording with durability to the extent that the stored video data is not lost against the impact or heat of a hydrogen explosion,
A camera unit that captures an image to be captured;
A microcomputer unit that performs an operation command to the camera unit, a video data conversion process of video captured by the camera unit, and a command to store or retrieve video data;
A memory interface unit that receives instructions from the microcomputer unit and performs transmission processing and extraction processing of video data;
A memory unit for storing video data transmitted from the memory interface;
The camera unit, the microcomputer unit, the memory interface unit, and the memory unit are stored in an explosion-proof case, and a transparent plate is provided on a video capture window formed on a wall surface facing the lens of the camera unit of the explosion-proof case. A video recording unit body having a structure provided; and
Installed in a location separated from the video recording unit body, detects hydrogen leaked from a hydrogen station, or detects hydrogen leaked by detecting Raman scattered light obtained from hydrogen irradiated with irradiation laser light. A hydrogen leakage detection unit that transmits an operation stop signal to the microcomputer unit when the hydrogen sensor unit or the Raman scattering light detection unit detects leakage of hydrogen,
When the microcomputer unit receives an operation stop signal from the hydrogen leak detection unit, the microcomputer unit transmits an imaging operation stop command to the camera unit and a video data overwrite prohibition command to the recording unit. apparatus.

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