JPH0366560B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an inner pipe leakage testing device that automatically tests for leaks in fluid piping (so-called inner pipes).

Configuration of conventional example and its problems As this type of internal pipe leakage inspection device, for example,
The configuration shown in the figure has been proposed. That is, a flow rate sensor consisting of a fluid meter 2 and a signal generating section 3 that responds to the measuring portion of the fluid meter 2 and outputs a flow rate signal is provided in the fluid supply line 1, and this flow rate signal is used as input to meet predetermined conditions. This configuration includes a controller 4 that displays when the condition is satisfied. The controller 4 is constructed as shown in FIG. The flow rate signal is input to the determination section 5. When the flow rate signal meets a predetermined condition, for example, a state in which no flow rate signal is input for 60 minutes continues for n consecutive days, the determining unit 5 determines that there is a leak in the inner pipe and outputs a leak signal. This leakage signal is input to the first blinking signal generator 6. The first blinking signal generating section 6 outputs a blinking signal based on this leakage signal, and uses this blinking signal as a first display element.
LED7 flashes to indicate that there is an internal pipe leak to the outside. Reference numeral 8 denotes a battery as a power source for the device, and a voltage tester 9 tests the voltage of the battery 8, and outputs a drop signal when the voltage is below a predetermined value. The second point reduction signal generator 10 receives this drop signal and outputs a blinking signal. The LED 11 serving as the second display element blinks in response to this blinking signal to notify the outside that the battery voltage has dropped. In this configuration,
Since two display elements are required, the cost is high, and the case part of the controller needs to expose the lighting of the two display elements to the outside, making it relatively complex.

OBJECTS OF THE INVENTION The present invention solves the above-mentioned conventional drawbacks, and aims to use a display element that displays inner tube leakage and a display element that displays battery voltage drop in common.

Composition of the Invention In order to achieve the above object, the inner pipe leakage inspection device of the present invention prioritizes display and when displaying both inner pipe leakage and battery voltage drop at the same time,
A configuration in which a priority control section is provided for displaying the one with higher priority, and a blinking signal generating section is provided for outputting a blinking signal in which the blinking style in the case of an inner tube leakage display is different from the blinking style in the case of a battery voltage drop display. With one display element, it is possible to display both inner tube leakage and battery voltage drop so that they can be distinguished, and when displaying both at the same time, only the one with higher priority is displayed, so there is no confusion. There is no. Furthermore, since only one display element is required, the structure of the controller case can be simpler than that of the conventional one.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of the present invention will be described based on the drawings.

In FIG. 3, the same numbers as in FIG. 2 indicate the same items. 12 is a controller, which is configured as follows.
The leakage signal from the determination section 5 is input to the first blinking signal generation section 6 and the priority control section 13. On the other hand, the drop signal from the voltage inspection section 9 is sent to the second blinking signal generation section 14.
is input. The blinking signal generated by the first blinking signal generating section 6 has the waveform shown in FIG. 4a, and that of the second blinking signal generating section 14 has the waveform shown in FIG. 4b. The first blinking signal from the first blinking signal generating section 6 and the second blinking signal from the second blinking signal generating section 14 are input to the priority control section 13. The output of the priority control unit 13 is input to the LED 7 as a display element.

The operation of the above configuration will be explained below.

First, the case where there is only inner pipe leakage will be explained. The determining unit 5 determines that there is an inner pipe leak and outputs a leak signal. This leakage signal causes the first flashing signal generator 6
generates a signal with the waveform shown in FIG. 4a. This signal is output via the OR gate of the priority control section 13. On the other hand, the battery voltage inspection section 9 does not output a drop signal, and as a result, the output of the second blinking signal generation section 14 remains in the "Hi" state, and the priority control section 13
The NOR gate output remains “Lo”. Therefore, the LED 7 blinks according to the waveform shown in FIG. 4a.

Next, a case where there is only a battery voltage drop will be explained. Since the determination unit 5 does not output a leakage signal, the first blinking signal generating unit 6 does not generate a blinking signal. On the other hand, since the battery voltage tester 9 outputs a drop signal, the second blinking signal generator 14 generates a signal having the waveform shown in FIG. 4b. Since the input from the determination unit 5 of the NOR gate of the priority control unit 13 is “Lo” and the blinking signal from the second blinking signal generating unit 14 has the waveform shown in FIG. 4b, its output is “Lo”.
The waveform is an inversion of the one shown in Figure b. The input from the first blinking signal generator 6 of the OR gate is "Lo", the input from the NOR gate is the inverted waveform of Figure 4b, and the output is the inverted waveform of Figure 4b. waveform, and the LED 7 blinks in accordance with the inverted waveform shown in FIG. 4b.

As shown in FIG. 4, the blinking patterns are clearly different, so by looking at the blinking patterns of the LEDs, it is easy to know which one the current display is showing.

Next, a case where both inner tube leakage and battery voltage drop occur simultaneously will be described. Since the leakage signal is output from the determination unit 5, the NOR of the priority control unit 13
Since the input at the front of the gate becomes "Hi", its output is forced to become "Lo" regardless of the signal from the second blinking signal generator 14. Therefore, the signal from the first blinking signal generator 6 is outputted via the OR gate, and as a result, the LED 7 blinks in accordance with the waveform shown in FIG. 4a, indicating only the inner tube leakage.

After the inner pipe is repaired due to the inner pipe leakage display, it is necessary to turn off the inner pipe leakage display again. This is generally done by initializing the controller in some way. This initialization can be performed, for example, by removing the battery and reinserting it once to remove the controller power. With this method, when the controller is initialized, the indication of inner tube leakage disappears. This is because according to the above-mentioned conditions, at least n days are required before the inner tube leakage can be indicated again. If the battery voltage has dropped at this time, a battery voltage drop display will appear. Therefore, if both inner tube leakage and battery voltage drop occur at the same time, even if only the inner tube leakage is displayed, battery voltage drop can be displayed by following the above-mentioned procedure. There are no practical problems.

As described above, according to this embodiment, one display element is used to blink in different blinking patterns so that both inner tube leakage and battery voltage drop can be distinguished, so that they can be easily distinguished. In addition, when displayed at the same time, only the inner pipe leakage with a high priority is displayed, so there is no misidentification. 1 display element
Since only one controller is required, the controller case can be simplified. The controller detailed above can be realized using a microcomputer, and the determination section, the first and second blinking signal generation sections, and the priority control section can be realized as software.
In this case, since the function of the priority control section is realized by a program inside the microcomputer, no cost map is generated due to the addition of the priority control section.

In addition, in the above explanation, an example was explained in which priority is given to the indication of inner tube leakage, but when priority is given to battery voltage drop, the logic of the priority control section is changed, for example, as shown in FIG. This can be easily achieved by partially changing . Further, as shown in FIG. 6, the priority control section may be configured to mask the drop signal from the voltage inspection section with the leakage signal from the determination section.

Effects of the Invention As described above, according to the present invention, the following effects can be obtained.

(1) The number of display elements for inner tube leakage and battery voltage drop can be reduced to one.

(2) When only one display element is used, the blinking patterns of the two are different, so they can be easily distinguished.

(3) If it becomes necessary to display both at the same time,
Only the one with the highest priority is displayed, so there is no chance of misidentification.

(4) Since there is only one display element, the controller case can be simplified.

[Brief explanation of drawings]

FIG. 1 is a schematic configuration diagram of a conventional internal pipe leakage testing device, FIG. 2 is a block diagram thereof, FIG. 3 is a block diagram showing a schematic configuration of an internal pipe leakage testing device according to an embodiment of the present invention, and FIG. Figures a and b are blinking signal waveform diagrams for explaining the same operation, Figure 5 is a block diagram showing a schematic configuration of an inner pipe leakage inspection device according to another embodiment of the present invention, and Figure 6 is a diagram showing a schematic configuration of an inner pipe leakage inspection device according to another embodiment of the present invention. FIG. 2 is a block diagram of an embodiment. 1...Gas supply line, 2...Gas meter, 3
... Signal generation section, 5 ... Determination section, 6 ... First blinking signal generation section, 7 ... Display element, 8 ... Battery, 9
... Voltage inspection section, 14... Second flashing signal generation section, 13, 15, 16... Priority control section.

Claims (1)

[Claims] 1. A flow rate sensor installed in a fluid supply line and outputting a flow rate signal according to the fluid flow rate, and a determination unit that determines whether or not there is an inner pipe leak based on the flow rate signal from the flow rate sensor, and outputs a leakage signal when it is determined that there is a leak. a first blinking signal generator that receives the leakage signal and outputs a first blinking signal; a battery as a device power source; and a voltage of the battery is compared with a predetermined voltage, and when the former is lower than the latter; a voltage testing section that outputs a drop signal; a second blinking signal generating section that receives the drop signal and outputs a second blinking signal having a different blinking pattern from the first blinking signal; a priority control unit that receives the blinking signal and the second blinking signal and outputs the blinking signal with a predetermined higher priority as a display blinking signal; and a display element that receives the display blinking signal and displays a blinking display externally. An inner pipe leakage inspection device consisting of.