JPS581297A - Optical type measurement control system - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a control system using optical fibers.

Conventionally, many of these types of systems have been electrically operated, combining a normal contact switch and an electrical measuring device to meet the detonator rating. Therefore, in addition to making each device's container explosion-proof, it is necessary to take essential financial measures such as reducing the ignition energy to below the ignition energy, resulting in high equipment costs. For this reason, if this type of system is configured using less dangerous light such as a light source, each operating device and measuring device will be connected to a separate KII.
This has the disadvantage that the number of optical fibers becomes enormous, making it extremely expensive.

The object of the present invention is to eliminate the above-mentioned drawbacks and provide an optical steel control system that is cheaper and has no risk of explosion.

The purpose of the above is this departure! According to the method, a metering means for emitting light according to a measured amount from a controlled object and a code plate with a unique code are provided, and a control eccentric Kl. A plurality of operating means for emitting target price information or rotation and stop information of a controlled object are transmitted within one optical transmission line formed by optically combining an electric-to-optical converter and an electric-to-optical converter. from K to transmit the light 414# from the total four means and the plurality of operating means to the control device via the optical-electric converter, and control the controlled object based on this information. achieved.

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

The first WJ is a block diagram showing an embodiment of this invention.
This shows an oil tank level control system using AIPA. The 2nd WA is the 11th Il setting switch,
A schematic diagram explaining the operating principle of the start switch and the stop switch, No. 311 is a schematic diagram explaining the operating principle of the 1st level needle, and No. 4 is a schematic diagram explaining the operating principle of the 11Q earth chuck. be.

In Figure 311, 1 is the oil tank, 2 is the oil supply valve, S is the oil discharge pulp, 44 level needle, S is the hand control panel, 6 is the setting switch, 7 is the start switch, 8 is the straps/C ivy, and 9 is the 10 is an earth chuck, 11 is an optical fiber, 12 is a float, and 13 is a tape.

Oil tank l has oil supply valve 2 and oil release pulp 3
The oil level in the tank 1 is read by a level meter 4.

The operator stands in front of the hand control I15 at the site and sets the upper lj value and lower limit of the oil level using the setting switch 6, starts lubricating using the start switch 7, and when an emergency stop is required, presses the stop switch port. You can stop the entire system on the safe side by pressing . Another 1t operation! S
K is provided with one or more lamps 9 to inform the operator of the operating status. In addition, the oil tank IK is equipped with an earth chuck 16 to check whether it is grounded.

glmlllcM of the power setting switch 6, start switch γ, and stop switch 8 J[l! This will be explained with reference to the second @.

In the j1211, 11 is a 7-eyeper as shown in FIG. 1, 21 is an optical chain plate, and 22 is a rod lens for efficiently condensing the light from the 7-eyeper 11.

When the operator operates the switch at and -, the force of a spring (not shown) causes the optical section 1 [21 to change to fi! Move at a constant speed. As shown in FIG.
is carved into the exchange IK, and this series of patterns generates a code note that indicates that there is a code on the switch.

Therefore, the optical fiber 11 shown in FIG.
111Kim Tsudo Lens ahead! This optical striped Enoki has taken over the party and made it a parallel party! If you use an optical device that receives the light with a 5-digit rod lens 28 at a position opposite to it, it will be possible to receive light like this optical section 1 [21 no. It is possible to obtain a pulse; - code. By transmitting the pulses of the optical section 1 [21 to the computer room through the optical fiber 11 and decoding this code using the computer, it is possible to know which operation switch has been pressed at the site.

Next, the principle of operation of the level meter 4 will be explained with reference to FIG.

In the same 11, l is oil tank, 11 is Hikari 7 Aipa,
1 is a), 13 is a tape, and 22 is a rod lens.

As is clear from the cabinet, depending on the level of oil consumption,
tl-) 12 moves, and the electrodynamics of flow) 12 moves the tape 13. If slits 8 are bored in advance at predetermined intervals on this tape IIIK, the optical section 1[! As in the case of 1, optical fiber 11 and - Tsudoshinzu! By using an optical device that combines the above two, it is possible to obtain light pulses that correspond to the oil level. In this case, since the slits 1 are cut at a constant interval, the level of the casing is determined by counting the number of light pulses from the reference source. Regarding the operating principle of 1. No. 411
Part II & beak.

In addition, the same figure (1) is a front view of the earth chuck by this departure W14, and the same figure (b) is a survey drawing.

In the same 11, 11 is an optical fiber, 22 is a loft lens, 23 is a light shielding plate, 24 is a tank wall, 25 is a chuck plate, and 26 is an electrode rod.

A chuck plate 25 is installed on the tank wall 24, and a light shielding plate 23 is provided on one side of the chuck I [25], and is installed between the rod lenses 22 that extend relative to each other. When the electrode rod 26, which is grounded on one side, is inserted into the chuck plate 25 in the non-operating state shown in FIG. 1 (1), Chatter@2!
S is moved from the dotted line state in 11(b) to the condensed line state, and the rod light shield 1 [23 is also pushed up from the dotted line to the solid line state, thereby causing the rod lens! 2. 5 to which optical fiber llK light is supplied. Therefore, the light is blocked to the ungrounded edge, and from this K the computer can know that the grounding is not established.

*SSa is a system configuration indicating the previous generation measurement control system using a computer.

In 111, the CPU is a computer, ]! 10 is electricity-
The light-coal exchanger, 0β is the light-to-electricity converter, and l/A is the electricity-to-air converter, and the numbers are the same as those explained above. The case of lubricating will be explained.

The light constantly emitted from the B10 device is Hikari 7 Eye/
If the earth chuck 10 is complete and the stop switch 8 is not pressed, the light 7 will pass through the start switch γ, the setting switch 6 and the level meter 4, and then turn on the light 7 again. Light receiving element 0711cj located in a computer room with a stormy environment past Aipa 11.
[ru.

When the operator selects the setting value for the level of oil to be added and selects and presses one of the setting switches 6, the next code note is to connect the optical fiber 11 to the light receiving element of the meter. The evacuation test was conducted on 0/4, and it was decoded by the computer CPυ and the message was 4v.
be done. And the note that the information has been received is visible light B.
Next, when the operator presses the start switch 7, the setting switch 6
As in the case of , the computer CPU receives the signal, converts it into a pneumatic signal through the electro-pneumatic converter 18/A, and opens the refueling pulp 2 to start refueling. As the oil level rises, the level meter 4 sends out a light pulse signal, which is sent to the computer C.
PU counts one after another.

When the oil level reaches the value preset by the setting switch 6, the computer CPU activates the electro-pneumatic converter Fi/
A [The signal is lost and the oil supply pulp 2 is stopped. If the on-site operator needs to stop the refueling in an emergency (11), if he presses the stop switch 8, no light will pass through the optical fiber IIK, and the refueling pulp 2 will suddenly close. A system is set up. Further, when the earth chuck 10 comes off or the optical fiber 11 is broken and light no longer returns to the computer room, the oil pulp 2 in the bay is similarly suddenly closed.

As described in 5 above, all on-site signals can be sent to the computer room by using only one loop of the optical fiber 11.

FIG. 6 is a schematic diagram showing another application example, in which a tank truck is refueled with TAK oil. In this case, the fifth
The concept of the system is the same except that a flow needle PL is attached in place of the level meter 4 for the oil tank 1 shown in the figure. The hand control panel 5 is constructed as shown in the figure and is installed near the oil tank.

FIG. 7 is a schematic diagram showing the operating principle of the flowmeter FL explained in the 6th WM. A positive displacement flow rate needle of the type that rotates depending on the flow rate is used, and the rotation is transmitted from this rotor to the slot F circle, 1 [81] by a gear mechanism, and the rod lens is connected as in the example of the level needle in Fig. 3. 22 and the use of the optical fiber 11, it is possible to obtain a light pulse corresponding to the rotation of the slit circle 1 [8L].

As described above, according to this invention, each switch in the field can be killed using a cage-like optical snap switch.
Since the optical pulse is designed to increase the number of optical pulses, the system configuration is such that signals can be transmitted between the field and the computer room using only one loop of optical fiber, reducing the number of optical components and optical fiber construction costs. The contribution it makes to this is extremely large.

This invention is not limited to the petrochemical industry, but can be used as is in fuel metering systems at city gas stations.
Furthermore, it can be widely applied in combination with a microprocessor to control panels of vending machines selling cigarettes, coffee, etc.

[Brief explanation of the drawing]

Fig. 1 is a block diagram showing an embodiment of this function, and Fig. 2 shows the operation of the setting switch, start switch, and stop switch. ! i! Schematic diagram for explaining the 3rd
The figure is a schematic diagram for explaining the operating principle of the level needle, #I
Figure 4 is a schematic diagram to explain the operating principle of the earth chuck, Figure 5 is a system configuration diagram showing the previous measurement control system using a computer, Figure 6 is a schematic diagram showing an example of application of this invention, Figure 7 The figure is a schematic diagram illustrating the operating principle of the flow rate needle of the sixth cabinet. Code explanation 1...Oil tank, G...Refueling pulp, 3...Oil discharge pulp, 4...Level needle, G...Hand control panel, 6
...Setting switch, γ...Start switch, 8.
...Stop switch, 9...Lamp, 10...Earth chuck, 11...Optical 7-eyeper, 12...Float, 13...Tape, 21...Optical chain plate, 22...
...Rod lens, 23...Light shielding plate, 24...Tank wall, 2T...Chuck plate, 26...Electrode rod, 7 people...Tank, FL...Flow rate needle, 8L... ...Slit disc agent Patent attorney Akio Namiki Patent attorney Kiyoshi Matsuzaki

Claims (1)

[Claims] By measuring the control amount of the controlled object and transmitting the measured amount to the control device via a single optical transmission path formed by optically connecting an electric-to-optical converter and an optical-to-electrical converter, It is a 5Kt light measurement and control system for controlling the controlled object, and includes a total of means for cutting light from the electro-optical converter according to the measured amount, and a unique code. The front control device is equipped with a code board, and a second number of operation means are provided for transmitting light in accordance with the code to obtain target value information of the front control device, control target ms, and stop information over the optical transmission line. Series El! 411111, wherein the measurement IPR and the party messages from the plurality of operating means are transmitted to the control device via the optical-to-electrical converter. Optical meter-control system.