JPS62236565A - Apparatus for setting microcomputer applied gas meter - 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 Field of Industrial Application The present invention relates to a setting device that is used for gas cutoff valves and the like and writes set values of a microcomputer-applied gas meter (hereinafter referred to as a microcomputer meter) into the microcomputer meter.

Conventional Technology For the safety of gas consumers, microcomputer meters have been developed that act as gas cutoff valves.The setting value is input by switching a switch on a printed circuit board built into the microcomputer meter. ing.

FIG. 4 is a configuration diagram of setting value input of such a microcomputer meter, and FIG. 5 is a flowchart of the microcomputer.

In FIG. 4, 1 is a printed circuit board with a built-in microcomputer meter, 2 is a microcomputer (hereinafter referred to as a microcomputer) that controls the entire system, 3 is a battery, 4 is an interface, and 6 is an input/output unit attached to the microcomputer meter. 6 is a setting switch, and 7 is an issuing element.

The operation of the microcomputer meter configured as described above will be explained below.

Before inserting the battery 3 into the printed circuit board 1 with a built-in microcomputer meter, the setting switch 6 is set to a desired value and the battery 3 is inserted. After executing the initial program, the microcomputer 2 executes the setting switch 60 program and reads the setting switch 6.

Then, the main program is executed according to the manually entered setting values, and the setting switch input program is executed again at regular intervals, and the setting switch 6 is input.

Problems to be Solved by the Invention However, in the above-mentioned device, a setting switch must be attached to each microcomputer meter, which is one of the causes of increased costs. Also, when you want to read the set value (for example, change the amount of gas flowing in a given time and change the operating time of the gas cutoff valve), set value (when responding to a change in gas type)
When it is desired to change the microcomputer meter, the printed circuit board with the built-in microcomputer meter must be removed from the case containing the microcomputer meter, which poses problems in terms of construction.

In view of the above-mentioned problems, the present invention provides a device for setting and confirming the set value of a microcomputer meter from outside the microcomputer meter.

Means for Solving the Problems The means of the present invention for solving the above problems includes a switch for selecting a setting value of a microcomputer meter, a display section for displaying the setting value, and a light receiving means for receiving light emitted from the microcomputer meter. A setting device is constituted by a driving means for turning on and off a switch means installed in the microcomputer meter, and a control section having functions of transmitting, comparing, and reading set values to the microcomputer meter using the light receiving means and the driving means. It is to be.

According to the present invention, with the above-described configuration, the set value of the microcomputer meter can be sent to the microcomputer meter from outside the microcomputer meter without using a wire, thereby significantly improving maintainability.

EXAMPLE An example of the present invention will be described below. FIG. 1 is a configuration diagram of a microcomputer meter 9 and a setting device 8 that changes its set value.

In order to change the setting value of the gas meter 9, the setting device 8 includes a selection switch 1o1 which selects the setting change value, two interfaces 11 and 12, a control unit 13 such as a microcomputer that receives the setting change value and issues a control signal, and a setting change value. a display unit 14 that receives a signal to change the setting value from the control unit 13 and generates a magnetic field, and a driving unit 15 such as a coil that generates a magnetic field; and a light receiving unit 1 that receives a signal to change the setting value from the gas meter 9.
Consists of 6. The gas meter 9 also includes a gas cutoff valve 1, a measuring cell 18, a flow sensor 19 that outputs one pulse when a certain flow of gas flows into this cell, and a flow rate sensor 19 that outputs one pulse when an excessive flow rate of gas is detected by this flow sensor. A control unit 20 such as a microcomputer that makes a judgment and issues a signal to close the gas cutoff valve 17, a battery 21. A switch/edge means 22 such as a reed switch/edge that receives a signal of a setting change value of the setting device 8, and a light emitting means 23 that receives the signal received by this means via the control unit 2o and emits light. It consists of an interface 24. In FIG. 1, a case will be considered in which a setting change value is transmitted from the setting device 8 of the microcomputer meter 9 to the microcomputer meter 9. The set value of the microcomputer meter 9 is set in advance using the selection switch 10 of the setting device 8, and the set value is displayed on the display unit 14 via the control unit 13. Then, when the start switch (not shown) is pressed, transmission from the setting device 8 to the microcomputer meter 9 is started. That is, a magnetic field is applied to the switch means 22 from the drive means 16 which receives the set value of the selection switch 1Q via the control section 13. Then, a signal of the set value is emitted as light from the light emitting means 23 via the control section 2o, and the light receiving means 16 receives this. That is, when transmission starts, the control section 13 constantly monitors the light emitting means 23 of the microcomputer meter 9 using the light receiving means 16 and continues waiting for a synchronization signal from the microcomputer meter 9. If the synchronization signal is detected, the control unit 10
The drive means 16 is turned on/off according to the set value via the interface 12, and the switch means 22 in the microcomputer meter 9 is turned on/off. The microcomputer meter 9 monitors the on/off state of the switch means 14 at the timing from the synchronization signal and obtains the set value.

FIG. 2 is a diagram showing the timing of transmission.

The setting device 8 of the microcomputer meter 9 monitors the light emitting means 23 of the microcomputer meter 9 when transmission starts. When the synchronization signal 23 is detected, the setting device 8 of the microcomputer meter 9 turns on the drive means 16, turns on the switch means 14 in the microcomputer meter 9, and returns the return signal 24. Microcomputer meter 9
When it receives the return signal 24, it sends a receivable signal 26, and thereafter, the microcomputer meter 9 inputs the signal from the setting device 8 of the microcomputer meter 9 every 2T period.

(Timings A, B, C, D...) On the other hand, after receiving the receivable signal 25, the setting device 8 of the microcomputer meter 9 waits for a time T, and thereafter transmits the set value at a cycle of 2T. (timing a, b, c, d...).

In this way, the microcomputer meter 9 receives and receives the midpoint of the transmitted signal, and stable transmission can be performed even if the oscillation frequencies of the microcomputer meter 9 and the microcomputer meter setter 8 are different. Furthermore, if the signal received by the microcomputer meter 9 is directly sent back to the setting device 8 of the microcomputer meter 9 using the light emitting means 23, the setting device 8 of the microcomputer meter 9 can compare it with the transmitted signal, and the transmission is reliable. Improves sex (timing ■, @).

FIG. 3 is a flowchart of the above-mentioned operation.

As described above, according to the microcomputer meter setting device of this embodiment, the setting value selection switch, the setting value display section,
With a configuration including a light receiving means for receiving light from the microcomputer meter, a driving means for turning on and off the switch means in the microcomputer meter, and a control section for transmitting the set value,
It becomes possible to set the setting value of the microcomputer meter externally.

Effects of the Invention As described above, according to the present invention, a set value selection switch, a set value display section, a light receiving means for receiving a light emitting signal of a microcomputer meter, and a driving means for turning on and off the switch means in the microcomputer meter are provided. , and a control unit that transmits the set values, the set values of the microcomputer meter can be set from outside the microcomputer meter, and maintainability can be improved.

[Brief explanation of drawings]

Fig. 1 is an overall configuration diagram of a microcomputer meter setting device showing an embodiment of the present invention, Fig. 2 is a timing chart of the same device, Fig. 3 is a flowchart of the same device, and Fig. 4 is a conventional example. The block diagram and FIG. 6 are flowcharts of a conventional example. 8...Setting device, 9...Gas meter, 1
o... Selection switch, 13... Control section, 14... Display section, 16... Drive means, 16... Light receiving means, 22... Switch means, 23... Light emitting means. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 3
Figure 5

Claims (2)

[Claims] (1) a gas meter, a switch means that turns on and off each time a constant flow rate of gas flows through the gas meter, a gas cutoff valve, and a control section that detects the gas flow rate using the switch means and operates the gas cutoff valve in the event of an abnormality; a light emitting means for notifying the abnormality, a selection switch for selecting a set value of the gas meter, a display section for displaying the set value, a light receiving means for receiving light emitted from the gas meter according to the set value, and a light receiving means for receiving light emitted from the gas meter according to the set value; A microcomputer application comprising a drive means for remotely turning on and off the switch means of a gas meter, and a control section having a function of transmitting a set value to the gas meter without using a transmission line and comparing the set value with the gas meter using the light receiving means and the drive means. Gas meter setting device. (2) The microcomputer-applied gas meter setting device according to claim 1, wherein the display section has a function of detecting and displaying abnormalities such as transmission errors and voltage drops.