JPH0314001A - Fluid controller - Google Patents

Abstract

PURPOSE:To use an external power source to miniaturize a battery and to extend the life of the battery by providing a fluid controller having a power supply part with a switching circuit for switching to the external power source. CONSTITUTION:At the time of driving a breaker 4 and a display device 5 by the command from the outside of a main device, they are driven by the external power source. That is, when a breaking signal comes to a communication circuit 6 from the outside of the device, the communication circuit 6 decodes a text and outputs a signal for switching to the external power source to a switching circuit 8 based on this command, and switching to the external power source is performed. When a prescribed time elapses after the output of the switching signal to the switching circuit 8, a judging circuit 3 drives the breaker 4 and the display device 5 to not only stop a fluid but also display this state. The same operation is performed when the judging circuit 3 detects the abnormal state. Thus, the battery is miniaturized and the life of the battery is extended.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention belongs to the field of fluid control technology, and relates to power supply control in a fluid control device.

BACKGROUND OF THE INVENTION The signal system (thin line) and power supply system (thick line) of a conventional fluid control device are shown in FIG. It is composed of functional blocks of WI 6 and power supply section 7. In the signal system, (2) detects the flow rate of fluid, transmits a signal, and inputs the signal to the metering circuit 2.

A measuring circuit 2 counts the signals and calculates a metric 6
The judgment circuit 3 compares and judges the measured value with a pre-stored safety standard value, and issues an abnormal signal when the measured value deviates from the safety standard value and when the voltage of the power supply section 7 is below a predetermined value. Then, the shutoff device 4 and the display 5 are operated to shut off the fluid and display the reason for the shutoff. After removing the cause of the deviation from the safety standards, the shutoff device 4 is returned to open and the fluid is allowed to pass.

In addition, 3 receives a signal from the communication circuit 6, and a blocking bag W4
The communication circuit 6 has the function of operating the display device 5 and transmitting a signal indicating the reason for the interruption due to the abnormality to the outside through the communication circuit 6. Elements include a remote control for remotely operating the fluid control B device, and a centralized online monitoring center via a telephone line interface. In the power supply system, small capacity batteries
Power is supplied to the flow rate detector 1, the metering circuit 2, the judgment circuit 3, and the communication circuit 6, as well as to the actuators of the cutoff device 4 and the indicator 5.

Problems to be Solved by the Invention However, in the above configuration, there are cases where the shutoff device 4 and the display 5 are activated many times by a signal from outside the fluid control device, for example, a shutoff signal from a remote control or a central monitoring center. be. Most people use the remote control to close the shutoff valve every time they go out. In addition, a shutoff valve return signal may be sent from a remote control or a central monitoring center to return and open the shutoff device 4. Normally, the shutoff valve is a self-holding type, so a considerable amount of electric power is required for the return operation. Since the IT power supply unit is a small capacity battery, if it is used in the manner described above, the life of the power supply will be shortened, which poses a problem.

The present invention is intended to solve such conventional problems, and an object of the present invention is to use an external power source to drive the shutoff device and the display in response to commands from outside the device.

Means for Solving the Problems In order to solve the above problems, the fluid control device of the present invention includes: a communication circuit that decodes a cutoff command message; a judgment circuit that outputs a power supply switching signal and a cutoff signal according to the cutoff command; It is comprised of a switching circuit that operates in response to a source switching signal, a cutoff device that is driven in response to the cutoff signal, and a display.

Effect of the present invention In the above configuration, when a cutoff signal arrives at the communication circuit from outside the device, the communication circuit decodes the message. Based on this command, when the external power source is available, a switching signal to the external power source is output to the switching circuit, and the switching circuit switches tfl to the external power source. No output when there is no external tS. The judgment circuit outputs a switching signal to the switching circuit, and after a predetermined period of time L1 has elapsed, it sends a shutoff signal to the shutoff device and the display, and drives the shutoff device and the display to close the fluid and display the information. Also, when the judgment circuit detects an abnormal condition, it outputs a power switch signal to the switching circuit to switch from the battery to the external power source.After a predetermined time t has elapsed from the time when the judgment circuit detects an abnormality, a cutoff device is displayed. A shutoff signal is sent to the device, and the shutoff device and indicator 5 are driven to close the fluid and provide an indication.

Next, when the interrupting device is manually reset, the device outputs a reset signal, and after a predetermined time t2 has elapsed since the determination circuit receives the reset signal, it sends a power switch signal to the switching circuit, and the switching circuit connects the external power source to the power source. Switch to.

When the valve is reset by remote control, when the communication circuit receives a reset signal from outside the device, the communication circuit decodes the message and the 0 judgment circuit sends a reset signal to the shutoff device in response to this command. The shutoff device has a remote return mechanism (for example, a motorized return mechanism) and is activated. Since the time is set in consideration of the time from start to completion of recovery, the judgment circuit sends a recovery signal to the interrupter, and after a predetermined time t2, sends a switching signal to the switching circuit, and the switching circuit disconnects from the external power supply. Switching to battery power completes recovery.

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

FIG. 1 is a functional block diagram of the present device, and FIG. 2 shows an embodiment of the switching circuit.

The device flow rate detector 1 is composed of a flow rate detector 1, a metering circuit 2, a judgment circuit 3, a cutoff circuit 4, an indicator 5, a communication circuit 6, a power supply section 7, and a switching circuit 8. The switch is activated by interaction with a magnet attached to the rotating part of the gage mechanism and outputs a pulse signal, so that the flow rate can be detected as a pulse.

The measuring circuit 2 is a circuit that measures and integrates the pulse signal of the flow rate detector 1. The judgment circuit 3 stores the normal flow rate value, and has the function of outputting an abnormal signal to the cutoff circuit 4 and the display 5 if the measured value of the metering circuit 2 deviates from the normal value, and the function of outputting an abnormal signal to the cutoff circuit 4 and the display 5.
When the voltage value of falls below a predetermined value, an abnormal signal is output to the cut-off circuit 4 and the display 5, and an abnormal signal is output to the cut-off circuit 4 by input from an external sensor (seismic sensor, gas pressure sensor, gas alarm, etc.). and a function of detecting a signal from the communication circuit 6 or a return signal of the cutoff circuit 4 and driving a delay timer respectively to activate the cutoff circuit 4 or the switching circuit 8 after a predetermined time. It has a function of sending various abnormal signals to the communication circuit 6.

The communication circuit 6 has the function of receiving a control signal from outside the fluid control device, decoding it, and sending it to the judgment circuit 3, and composes the measured value from the measuring circuit 2 and the abnormality information from the judgment circuit 3 into a telegram and sends it from the fluid control device to the home. It has the function of sending information to a central monitoring center via an information panel, telephone line network control device, etc.

The power supply unit 7 uses a lithium battery that has a long life and good voltage characteristics. The switching circuit 8 has a function of switching between internal and external power sources in order to supply power from the outside in order to suppress battery consumption when driving the cutoff circuit and the display 5. Second example
As shown in the figure.

A circuit power source 12 is supplied by switching between an external power source 11 from an in-home information board or the like and a power source section 7 using a self-holding relay 10.

The transistors 13 and 14 are activated by the switching set signal 15 and the switching reset signal 16 and have the function of driving the IO. 17 is a capacitor to prevent the power supply circuit from being disconnected during switching.

Figure 3 shows external control signals, judgment circuit output, cutoff device output,
The operating state of the switching circuit is shown in a timing chart.

According to the above configuration, the switching circuit 8 is switched to external t'g by an external control signal (cutoff) or an abnormal signal, and after a predetermined time, the cutoff signal activates the cutoff circuit 4 and the indicator 5 to cut off the fluid. After a predetermined time due to manual return or an external control signal (return), the switching circuit 8 is activated by the return signal, and the power supply unit 7 is activated.
Switch to. That is, in this fluid control device, when the cutoff circuit 4 and the display device 5, which consume a large amount of current, operate, the built-in battery capacity can be minimized by switching to an external power source and operating them. Since the use of batteries is essential as a countermeasure against power outages, the idea is to use an external power source except during power outages.

Effects of the Invention As described above, the fluid control device having the power supply switching circuit of the present invention provides the following effects. That is, since an external power source can be used, the battery can be made smaller and the battery life can be extended.

[Brief explanation of drawings]

FIG. 1 is a functional block diagram of a fluid control device in one embodiment of the present invention, showing the interrelationships of the entire system. Second
The figure is a circuit diagram showing an example of the switching circuit, and FIG. 3 is a time chart showing the signal relationship until driving the switching circuit.
FIG. 4 is a conventional functional block diagram. l...Flow rate detector, 2...Measuring circuit,
3... Judgment circuit, 4... Breaking device, 5
...Display unit, 6...Communication circuit, 7...
...Power supply circuit, 8...Switching circuit, 10...
...Self-holding relay, 11...External power supply,
12...Circuit power supply, 13.14...Transistor, 15...External switching cent signal (judgment circuit output 2), 16...External switching reset signal (Judgment circuit output 1), 17...Capacitor.

Claims (4)

[Claims] (1) A flow rate detector that detects the flow rate of fluid, a metering circuit that measures the flow rate, and a metering circuit that determines whether the measured value of the flow rate circuit is normal or abnormal, and determines a signal from outside the fluid control device. A circuit for determining an abnormality signal or a control signal, a shutoff device operated by the abnormality signal or a control signal from outside the fluid control device, an indicator for displaying the reason for shutoff, a communication circuit for communicating with the outside of the fluid control device, and a power supply unit. A fluid control device having a switching circuit for switching to an external power source. (2) A patent that has a judgment circuit with a built-in delay timer that outputs a power switching signal to the switching circuit at the same time as an abnormal signal or a control signal from outside the fluid control device is input, and outputs a shutdown signal to the shutdown device and display after a predetermined period of time. Claim No. 1
) The fluid control device described in section 2. (3) The fluid according to claim (1), further comprising a determination circuit with a built-in delay timer that outputs a power switching signal to the switching circuit after a predetermined time after inputting a return signal of a fluid control device or a shutoff device. Control device. (4) The fluid control device according to claim (1), which has a judgment circuit with a built-in external power supply voltage detection function.