JP4615146B2 - Operation indicator with explosion-proof construction - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an operation indicator having a flameproof structure, and more specifically, has a display surface of, for example, 12 inches or more, and there is a danger of an explosion filled with flammable gas. The present invention relates to a large display with a touch operation function that can be safely operated and used even in an atmosphere.
[0002]
[Prior art]
In places that handle flammable liquids and gases, such as petrochemicals and various chemical industries, on-site display devices can be used to set production conditions, manage production, and manage inventory, as well as to control processes using computers and operate various equipment. The movement to operate and manage with is becoming prominent. In addition, personal computers and the like have become quite popular due to remarkable progress in information technology in recent years, and the need for exchanging information in both directions by connecting personal computers in the panel room and on-site display devices has further increased. Yes. In order to cope with such a situation, the applicant has disclosed an explosion-proof touch panel that can be safely operated and used even in a ring-filled state in which a flammable gas is filled in Japanese Patent Laid-Open No. 6-295537. Disclosed and already put into practical use.
On the other hand, in order to meet the need to display a large screen with high resolution directly on a display or even more clearly display video image information even under conditions where flammable gas exists. In Japanese Patent Application No. 12-304863, the applicant has already proposed a large display device in which the display surface of the touch panel is 15 inches or more using ultrasonic surface acoustic waves.
[0003]
However, the explosion-proof operation indicator described in the above-mentioned Japanese Patent Application Laid-Open No. 6-295537 proposed by the present applicant has an input-type optical display means, a touch operation unit, and a safety holder, and the opening window has a pressure resistance. The display surface of the display device is about 10.4 inches because of its structure. However, there is still a problem to be solved in various information, for example, input / output amount of image information, or resolution thereof.
In order to solve these problems, a large-sized display with an internal pressure explosion-proof structure proposed by the present applicant in the above Japanese Patent Application No. 12-304863 includes a touch panel using ultrasonic surface acoustic waves, a display, A protective gas supply device for supplying a protective gas is provided in a case where the touch panel and the display are mounted, and packing is provided on the touch panel.
However, the large display employs an internal pressure system that pressurizes the display with a protective gas such as inert gas or air so that surrounding flammable gases do not enter the display. For example, there is an unsolved problem that it is extremely difficult to employ in the manufacturing site of pharmaceuticals, foods, or ICs that extremely dislike the inflow of gas such as air.
[0004]
[Problems to be solved by the invention]
Therefore, in order to solve the above-described problems, the present invention replaces the internal pressure system that pressurizes the inside of the display by supplying a gas such as air from the outside, and the explosion-proof structure that withstands the explosion pressure of the display case. In addition, it can be used safely even in an atmosphere with a risk of explosion filled with flammable gas, etc., and by connecting to an information terminal such as a personal computer, a large screen can input and output a large amount of information It is an object of the present invention to provide an operation indicator having a flameproof structure.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, a large-sized operation indicator with a flameproof structure according to the present invention is mounted on a container having a flameproof structure composed of a lid having an aluminum alloy opening and a rectangular parallelepiped body, and a back surface of the lid. a light-transmissive substrate made of reinforced glass pressure plate for sealing the opening that is, a display for displaying information are arranged so as to oppose the light transmitting substrate, the transparent substrate, a corner An ultrasonic transmitter, an ultrasonic receiver, and a reflective array that reflects the ultrasonic waves are disposed at corners and peripheral portions , and the ultrasonic transmitter, the ultrasonic receiver , and the reflective array are the lid. It housed in the back surface of the space parts, characterized in Rukoto.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of an operation indicator with a flameproof structure according to the present invention will be described below based on examples shown in the drawings.
FIG. 1 is a side view of a pressure-proof explosion-proof structure operation indicator, and FIG. 2 is an explanatory diagram showing the principle of a touch input device using ultrasonic acoustic waves.
The pressure vessel (10) includes a lid (20) having an opening (21) and a rectangular parallelepiped main body (30).
The pressure vessel (10) is manufactured to withstand explosion caused by excessive pressure in the vessel. In this embodiment, the pressure vessel (10) is processed with an aluminum alloy casting having a thickness of about 15 mm, and the lid (20) and the main body ( 30) is firmly tightened with a fastening member such as a bolt.
[0007]
A display (22) is fixedly mounted at a position facing the opening (21) of the pressure vessel (10), and the opening (21) is sealed at a position facing the outer surface of the display (22). A touch panel substrate (23) to be stopped is provided. A tempered pressure-resistant glass plate is employed for the substrate (23) so as to withstand excessive pressure in the container.
The corner of the substrate (23) is placed on the back surface of the lid (20) via the holding member (24), and the corner of the display (22) is the corner of the back surface of the substrate (23). In addition, they are firmly attached to satisfy the conditions of the explosion-proof gap defined in the explosion-proof standards, so they are designed to withstand even if there is a flammable explosion in a container. .
[0008]
The display surface of the substrate (23) responds quickly to various information transmitted from an information terminal such as a personal computer and output to the display (22), and touches the substrate (23) with a finger. The large screen uses ultrasonic acoustic waves so that various information of the response results can be quickly input to a personal computer.
Here, the outline of the principle of the touch input device using ultrasonic acoustic waves will be described with reference to FIG.
An X-axis ultrasonic transmitter (31) is located in the lower right corner of the substrate (23), an X-axis ultrasonic receiver (32) is located in the upper right corner, and similarly, a Y-axis ultrasonic wave is located in the upper left corner of the substrate (23). A transmitter (33) and a Y-axis ultrasonic receiver (34) are respectively disposed in the upper right corner.
In predetermined positions above and below the substrate (23), a plurality of X-axis reflective arrays (35) and (36) each having a predetermined shape protrude in parallel with each other, and similarly, on the left side of the substrate (23). A large number of Y-axis reflection arrays (37) and (38) each having a predetermined shape are provided in a predetermined position on the right so as to face each other in parallel.
[0009]
Now, when ultrasonic waves are transmitted from the X-axis ultrasonic transmitter (31), the ultrasonic waves are sequentially reflected on the X-axis reflective array (35) from the side closer to the X-axis ultrasonic transmitter (31), and the traveling direction thereof. It is transmitted in the direction orthogonal to. In the drawing, the ultrasonic wave is indicated by five arrows, but actually propagates over the entire surface of the substrate (23).
Then, the reflected ultrasonic waves are sequentially reflected again by the X-axis reflective array (36) facing the X-axis reflective array (35), and sequentially X-axis ultrasonic waves from the side closer to the X-axis ultrasonic receiver (32). It is received by the receiver (32).
Although not shown, the ultrasonic wave transmitted from the Y-axis ultrasonic transmitter (33) is reflected by the Y-axis reflective array (37) and is further opposed to the Y-axis reflective array ( 38) and is received by the Y-axis ultrasonic receiver (34).
Here, when the “certain location” on the substrate (23) is touched with a finger, the ultrasonic surface acoustic wave passing through the “certain location” is absorbed by the finger, and the X / Y-axis ultrasonic receiver (32). It is received in a state attenuated to (34). By detecting the return time of the attenuated signal, a “certain location” on the X and Y axes can be identified and recognized as position detection data.
[0010]
When this situation is seen in FIG. 1, the ultrasonic surface acoustic waves transmitted from the X-axis ultrasonic transmitter (31) and the Y-axis ultrasonic transmitter (33) are covered with a pressure-resistant container processed with an aluminum alloy casting. It goes straight through the joint surface between the part (20) and the substrate (23), and is reflected on the X-axis reflection arrays (35) and (36) and the Y-axis reflection arrays (37) and (38), respectively. The position on the touched substrate (23) is recognized by detecting the deviation of the reception time received by the child (32) and the Y-axis ultrasonic wave receiver (34).
[0011]
As described above, the operation indicator of the explosion-proof structure according to the present invention is not an internal pressure system in which the inside of the container is pressurized with the protective gas in order to prevent the external gas from entering the inside of the container (10), but the operation indicator of the container (10). Even if there is a flammable explosion inside, it has a flameproof construction that can withstand this. Therefore, it can be safely used even in a manufacturing site where flammable gas exists and where the inflow of external gas for pressurization is extremely hated.
In addition, since the substrate (23) employs a method using ultrasonic surface acoustic waves that does not have any worry about static electricity that occurs when a resin film is used, the display surface has a large size of, for example, 15 inches. It is possible to make a screen.
[0012]
The position detection data received by the X-axis ultrasonic receiver (32) and the Y-axis ultrasonic receiver (34) is appropriately converted into a signal suitable for input to the personal computer through the converter (11). The converter (11) and the display (22) are connected to the signal transmission device (12) by a cable. A screen of a personal computer arranged in a panel room or the like separated by a considerable distance is displayed on the display (22) by the signal transmission device (12), or a touch input signal on the substrate (23) is displayed in the panel room. It is possible to input to a personal computer.
[0013]
【The invention's effect】
The operation indicator of the explosion-proof structure of the present invention is provided with an ultrasonic transmitter, an ultrasonic receiver, and a reflective array for reflecting ultrasonic waves on a pressure-resistant translucent substrate that seals the opening of the container. Since a method using ultrasonic surface acoustic waves is adopted, there is no worry about static electricity that occurs when using a resin film. Therefore, the display surface of the substrate can be a large screen such as 15 inches, and a large high-resolution display can be used.
In addition, in order to prevent external gas from entering the container, instead of an internal pressure system that pressurizes the inside of the container with a protective gas, a container with a pressure-proof construction that can withstand even a flammable explosion in the container is adopted. Therefore, it can be used safely even at a manufacturing site where the inflow of external gas for pressurization is extremely hated. As a result, it is possible to display the computer screen of the central control room and the screen of the video monitor as they are even in the field where flammable gas exists, and it is also possible to directly input touch panel touch information to the computer. Therefore, even in a place where flammable gas exists, process control can be performed in exactly the same manner as in the production control room and the central control room.
[Brief description of the drawings]
FIG. 1 is a side view of a pressure-proof explosion-proof operation indicator. FIG. 2 is an explanatory diagram showing the principle of a touch input device using ultrasonic acoustic waves.
DESCRIPTION OF SYMBOLS 10 Pressure-resistant container 11 Converter 12 Signal transmission apparatus 20 Cover part 21 Opening part 22 Display 23 Substrate 24 Holding member 30 Main body 31 X-axis ultrasonic transmitter 32 X-axis ultrasonic receiver 33 Y-axis ultrasonic transmitter 34 Y-axis Ultrasonic receiver 35, 36 X-axis reflection array 37, 38 Y-axis reflection array

Claims (1)

A container having an explosion-proof structure composed of a lid having an aluminum alloy opening and a rectangular parallelepiped body; a translucent substrate comprising a tempered pressure-resistant glass plate that seals the opening mounted on the back surface of the lid ; A display that is arranged to face the translucent substrate and displays information;
The translucent substrate, the the corners and the peripheral portion and the ultrasonic wave emitting element and the ultrasonic receiver been provided with reflective arrays for reflecting ultrasonic waves, and the ultrasonic transmitter element, the ultrasonic receiver the operation display device of flameproof said the reflective array is characterized Rukoto housed in the back surface of the space of the lid.

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