JPH0434608A - Telemeter device - Google Patents

Abstract

PURPOSE:To make it possible to simply and accurately set up the aperture of a flow rate control valve by an operator existing in a remote place by integrating a function for controlling the valve driving time and driving direction of the flow rate control valve in the telemeter device. CONSTITUTION:The operator existing in the remote place sets up an objective value for a flow rate by an operation switch 30 for selecting a correction value from a current flow rate and executes input operation through a master switch 31, a signal is transmitted from a telemeter device master station 10 to a telemeter device slave station 11 through a telephone line 50. The slave station 11 compares the current flow rate value with the objective value, judges an opening or closing direction and an operation time and outputs an opening command or a closing command only for a required time to control the flow rate up to an objective flow rate (objective aperture) and automatically set up a required water feeding flow rate value. Consequently, the water feeding flow rate of the value 4 can be easily and accurately set up from a remote place.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Field of Application) The present invention relates to a telemeter device that remotely controls the opening degree of a flow rate@noise via a telephone line.

(Prior art) Conventionally, when setting the valve opening of a remote flow control valve via a telephone line, an operator manually operates the on/off valve.
The valve opening/closing motor is operated only for the duration of the off signal.

However, it takes a considerable amount of response time for the operation switch signal to operate a distant motor via the telephone line, reach the target opening, and then send the opening signal back to the operator via the telephone line. It is difficult to set accurate target values through manual operations by an operator.

(Problems to be Solved by the Invention) The present invention incorporates a function for controlling the valve operating time and operating direction of a flow rate control valve into a telemeter device; The object of the present invention is to provide a rational telemeter device that can easily and accurately set the opening degree of a flow control valve through a telephone line.

[Structure of the invention]

(Means and Effects for Solving the Problems) The present invention provides for determining in advance the water supply flow rate change characteristics at each point when changing the opening degree of the flow rate control valve from fully closed to fully open and storing it in a telemeter device. .

The remote operator sets the flow rate target value using the operation switch that selects the corrected value from the current flow rate, and by turning on the master switch, the signal is input to the telemeter device, and the telemeter device changes the current flow value and Compare the target value to determine whether to operate in the open or close direction and the operation time, output the open command or close command for the required time, and control until the target flow rate (target close degree) is reached. and automatically set the desired water flow rate value.

(Example) An embodiment of the present invention is shown in FIG.

In Fig. 1, there is a discharge valve 2 on the discharge side of the pump 1, which is connected to a flow rate control valve 4 through a discharge pipe 3, and the discharge side of the flow/amount control valve 4 is used to detect the water flow rate. It is connected to a water supply pipe 6 via a container 5. Further, an opening degree detector 7 is attached to the flow rate control valve 4 to detect its opening degree. Further, 10 is a telemeter device master station, 11 is a telemeter device slave station, 20 is an opening command needle, 21 is a water supply flow rate indicator, 30 is an operation switch, 31 is a master switch, and 50 is a telephone line.

Fig. 2 is a characteristic curve showing the change in water flow rate when the flow rate control valve 4 is changed from fully closed to fully open while the pump 1 is in operation and the discharge valve 2 is fully open. The amount of change in the opening degree S~S of the flow rate adjustment valve 4 can be determined to obtain uniform water supply flow rate changes F1~F at each point from fully opening to fully open, and the flow rate adjustment can also be performed. From the valve operating characteristics of the valve 4, the valve operating time for obtaining the opening degree changes S1 to S8 at each point can be determined.

As a result, the opening degree of the flow rate regulating valve 4 can be controlled by controlling the time from when an open command or a close command is started to when a stop command is given to stop the operation.

The operator checks the current instructions using the opening indicator 20 and the water flow rate indicator 21 in FIG.
When the master switch 31 is turned on, a signal is transmitted from the telemeter device master station 10 through the telephone line 50 to the telemeter device slave station 11, and the telemeter device slave station 11 performs control according to the flowchart shown in FIG. 4, an open command 41, a close command 42, or a stop command 45 is output.

When the control is started, the opening degree and flow rate change occur, and the relationship detector 7 and the water supply flow rate detector 5 detect this state change, and the telemeter device outputs the flow rate control valve opening degree signal 44 and the water supply flow rate signal 43, respectively. The signal is input to the slave station 10, transmitted back to the telemeter device master station 10 through the telephone line 50, and instructed by the opening indicator 20 and the water supply flow rate indicator 21.

As shown in the flowchart of Fig. 3, it is determined whether there is a request to change the water flow rate while the pump 1 is in operation and the discharge valve 2 is fully open, and if there is a request, the changed amount of flow rate is determined. to ~F, from flow control valve 4 according to the characteristic curve.
Opening degree change amount S1 to S.

is calculated, the previous opening degree is compared with the current opening degree, and if there is no change, the control is terminated.

If the current opening is larger than the previous opening, find the difference,
Open during control is determined from the operating time characteristics of the valve and a close command 42 is output, and when the control time is reached, a stop command 45 is output to stop the flow control valve 4 and end the control.

In addition, if the current opening is smaller than the previous opening, the difference is calculated, the control time is calculated from the valve operation time characteristics, and an open command 41 is output, and when the control time is reached, a stop command 45 is output, The flow control valve 4 is stopped and the control is ended.

〔Effect of the invention〕

As explained above, according to the present invention, when performing remote control using a telemeter device using a telephone line, the operator can select the target water flow rate value and simply turn on the master switch to adjust the opening of the flow rate control valve. Since the telemeter device determines the operating direction and operating time of the valve from the water supply flow rate characteristic curve and performs control, it becomes possible to easily and accurately set the water supply flow rate of the flow rate control valve from a distance. The present invention can also be widely applied to flow rate control and pressure control by setting the rotation speed of a pump.

[Brief explanation of the drawing]

Fig. 1 is a system diagram showing an embodiment of the present invention, Fig. 2 is a diagram showing the relationship between the opening degree of the flow rate control valve and the water flow rate, and Fig. 3 is a flowchart showing an example of the control operation of the flow rate control valve. It is a diagram. 1...Pump 2...Discharge valve 3...
・Spinning piping 4...Flow rate control valve 5...
Water supply flow rate detector 6...Water supply piping 7...Flow rate control valve opening detector S□~S,...Opening degree change amount F□~
F8...Flow rate change amount 10 Telemeter device master station 11... Telemeter device slave station 20... Opening degree indicator 21... Water supply flow rate indicator 30... Operation switch 31... Master switch 50... Telephone line 41... Open command 42... Close command 43... Water supply flow rate signal 44... Flow rate control valve opening signal 45... Stop command

Claims (1)

[Claims] In a telemeter device that remotely controls the opening of a flow rate control valve via a telephone line, it instructs the opening of the flow rate control valve and water flow rate sent from the telemeter slave station, and also sends a flow rate command to the telemeter slave station. Telemeter master station,
Memorize the characteristic curve between the opening degree of the flow rate control valve and the water supply flow rate, and input the degree of opening and current value of the flow rate control valve.
It is equipped with a telemeter slave station that calculates the control direction and control time of the flow rate control valve from the above-mentioned characteristic curve and the current value in response to the flow rate command from the telemeter master station, and outputs an opening/closing command to the flow rate control valve for the required time. A telemeter device characterized by: