JPH07111424B2 - Water quality remote monitoring controller - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to water quality measurement, in which the sample introduction flow rate of a water quality meter that can be automatically measured is introduced for a fixed time in accordance with the measurement time,
The present invention relates to an automatic water quality monitoring device that reduces sample consumption.

[Conventional technology]

Conventional equipment has various water quality (eg PH, residual chlorine, turbidity,
Dye, temperature, conductivity) each has its own independent water tank, and if necessary, manually sample the required amount of water and measure the water quality, or sample water with a sampling pump. It was common that

Therefore, water quality measurement is limited to major facilities such as water purification plants, and the measurement cycle is once / day or once / month. As a result, it was not possible to respond to social demands such as the delay in grasping abnormal conditions of water quality and the need for complicated equipment such as sampling pumps to measure water quality and the continuous and continuous monitoring of water quality at many locations.

[Problems to be Solved by the Invention] In the above-mentioned conventional technique, although the water quality sensor itself has been taken into consideration for reducing the consumption of sample water, the sample water is always passed through and drained.

Japanese Unexamined Patent Publication No. 57-118157 discloses a technique of using data measured at a certain time to set a time at which measurement should be performed after the certain time. However, in the above publication,
There was no description about the time required for the measurement output to stabilize, the time width for continuing water sampling, and reduction of the amount of water consumed for measurement.

The present invention, the measurement unit of the sample water is shared and synchronized with the water quality measurement time, and the measurement unit water flow of the sample water is suppressed to a fixed time only.
To reduce consumption.

[Means for solving problems]

The above-mentioned problem is that in the water quality remote monitoring and control device that centrally manages the water quality data measured at each controlled station of the distribution pipeline network to the central control station, the measured water intake branched from the distribution pipeline network. A water flow control valve and a plurality of water quality detectors are provided in the branching path for the converter, and a converter that converts the water quality level obtained by the plurality of water quality detectors into an electric signal and outputs the electric signal, and a converter that outputs the electric signal. And a water flow control device for controlling the opening of the water flow control valve over a time width obtained by adding a sampling time width capable of obtaining stable data to a time required for stabilizing each of the plurality of electric signals. .

[Action]

The measured water is made to flow into the measured water intake branch that has branched from the distribution pipeline network through a water flow control valve, and the water quality is detected by a plurality of water quality detectors provided in this branched path. The detected water quality is converted into an electric signal by a converter, sampled, transmitted to a central control station, and centrally managed. The inflow time of the measured water into the measured water intake branch is controlled by opening and closing the water flow control valve, but the opening control time width is stable for each of the multiple electrical signals output from the converter. This is the time width that is the sum of the time required to perform the operation and the sampling time width that allows stable data to be taken, and the minimum valve opening time is required to send reliable water quality data.
Therefore, the consumption of the measured water is reduced.

〔Example〕

An embodiment of the present invention will be described below with reference to FIG. The 1 control station is provided with 3 supervisory control panels, 4 remote supervisory control master station devices (hereinafter abbreviated as TM / TC master station devices), and 7 clock circuits, and 2 controlled stations 5 remote monitoring control slave station device (hereinafter abbreviated as TM / TC slave station device), 6 water quality automatic monitoring device and 8 one-shot timer circuit are provided, 3-1 controlled station call switch or 7 clock circuit On-time call signal from the water quality (eg PH, residual chlorine, turbidity,
Chromaticity, temperature, conductivity) are measured and the measured values are transmitted.

On the other hand, 6 is a control valve 6-1 and 6-
Various detectors 2 to 6-4 and converters 6-5 are incorporated. The control valve 6-1 controls water flow or water stoppage for guiding the sample water from 11 piping networks through 12 water conduits. The water quality of the sample water is detected by the detectors 6-2 to 6-4, and is drained through 13 drainage pipes. Where 6-
The 2,6-4 detector measures one water quality and the 6-3 detector detects four water qualities. The converter of 6-5 is 6-2 to 6
The water quality level detected by the -4 detector is converted into 10 electrical signals and output.

Figure 1 shows one controlled station,
In general, as shown in FIG. 2, there are many cases in which the equipment of the controlled station 2 is installed at each location of the distribution pipeline network 11 and the control station 1 centrally manages it.

Next, the operation will be described with reference to FIG.

The slave station call command 4-1 is transmitted from the TM / TC master station device 4 to the TM / TC slave station device 5 (the slave station call is a call switch 3-
There are two types of calling methods, that is, a manual calling by 1 and a timed automatic calling from the clock circuit 7). When the TM / TC slave station device 5 receives the calling command 4-1, it outputs the valve opening command 5-1 to the control valve 6-1 in synchronization with it to the one-shot circuit 8. The one-shot circuit 8 which has received the valve opening command 5-1 outputs the one-shot output 9 which is an opening command to the control valve 6-1 for a certain period of time. One-shot timer circuit 8
The output time of is the time required to stabilize the output signal 10 of the water quality automatic measurement device 6 plus the sampling time width of the TM / TC slave station device 5. By opening the control valve 6-1, sample water is passed through the detectors 6-2 to 6-4, and the water quality measuring operation is started by the detectors 6-2, 3 and 4. The measured value is converted into a predetermined electric signal 10 by the converter 6-5 and output to the TM / TC slave station device 5.

Water quality data output from the detector through the converter 6-5 10
Starts when water starts flowing (when the valve opens) and stabilizes after a certain period of time. TM / TC slave station device 5 has valve opening command 5
After outputting -1, at a predetermined sampling interval, the converter 6-5
The water quality data 10 input from is sampled, and the data of the measurement input 5-2 is rewritten to the latest sampling value every time sampling is performed.

When a predetermined time elapses after the one-shot timer circuit 8 activated by the valve opening command 5-1 starts to output the one-shot output 9, the one-shot output 9 is no longer output and the control valve 6-1 starts to close. Note that the predetermined time referred to here is, as described above, the time required for each of the plurality of output signals (water quality data) 10 to stabilize,
/ TC This is the time including the sampling time width with which the slave station device 5 can obtain stable data. The operation of the detector is stopped in synchronization with the beginning of closing the valve, and the value of the water quality data 10 also starts to stop. At the same time, the TM / TC slave station device 5 also stops sampling the measurement data, and then transmits the measurement data held in the measurement input 5-2 to the TM / TC master station device 4. The TM / TC master station device 4 receiving the measurement data outputs the measurement output 4-2.
Data is updated and displayed on the water quality data display 3-2.

Continuing, another embodiment of the present invention is shown in FIG. 4 and an operation explanation is shown in FIG. The present embodiment is a method in which a time switch 14 is provided on the controlled station 2 side, the entering time and the turning off time of the time switch 14 are set in advance, sample water is passed through at fixed time intervals, and water quality is measured. . The data transmission from the TM / TC slave station device 5 is performed by the water quality abnormality signal 15 only when there is an abnormality such as the upper limit and the lower limit of the measurement data, and only the memory data is updated during normal operation to reduce the transmission frequency. I'm drawing.

First, the time switch 14 is activated at a predetermined time, and the time switch output 9 which is a valve opening command to the control valve 6-1 is turned on. When the time switch output 9 is turned on, the control valve 6-1 begins to open, sample water is passed through the detectors 6-2, 3 and 4, and the water quality measurement operation of the detectors 6-2, 3 and 4 is started. To be done. The measured value is converted into a predetermined electric signal (water quality data) 10 by the converter and output to the TM / TC slave station device 5. The water quality data 10 output from the detector through the converter 6-5 starts to rise at the start of water flow (when the valve opens) and stabilizes after a certain time. The TM / TC slave station device 5 receives the water quality data 10 input from the converter 6-5 at a predetermined sampling interval after the time switch output 9 which is a valve opening command is turned on.
Is sampled, and measurement input 5-
Rewrite the data of 2 to the latest sampling value. On the other hand, in the automatic water quality monitoring device 6, the water quality data 10 is compared with preset upper and lower limits, and if the measured data deviates from the above limits, a water quality abnormality signal 15 is generated and the TM / TC slave station Sent to the device 5. If the measured data does not deviate from the above limit, the water quality abnormality signal 15 is not transmitted to the TM / TC slave station device 5. The TM / TC slave station device 5 receiving the water quality abnormality signal 15 transmits the data of the measurement input 5-2 to the TM / TC.
The TM / TC master station device 4 which has transmitted the data to the master station device 4 and received the data rewrites the data of the measurement output 4-2, and at the same time, displays the display output 3-3 on the water quality data display 3-2. To do.

When the set time elapses and the time switch 14 is turned off, the time switch output 9 which is a valve opening command is turned off, and the control valve 6-1 starts to close. At the same time, the operation of the detector is stopped in synchronization with the beginning of closing the valve, and the value of the water quality data 10 also begins to fall. The TM / TC slave station device 5 also stops sampling of measurement data at the same time. This state (control valve closed, detector operation stopped, TM / TC slave station device 5 sampling stopped) continues until the next turn-on time of the time switch 14.

As described above, in any of the examples, the sample water is passed through the automatic water quality monitoring device only during measurement, and is stopped during non-measurement. Therefore, there is an effect of significantly reducing the amount of ineffective water by measuring the water quality.

According to the present embodiment, when measuring 6 quantities of water quality (for example, pH / turbidity, residual salt, chromaticity, temperature, conductivity), water is continuously passed through each water tank and one type of water is used. If the sample consumption amount is about 1 / min, the consumption amount is 6 l / min if there are 6 kinds, and compared with the example for one month assuming that this is continuously consumed, the conventional value is 6 l / min × 60 × 24 × The amount of consumption is 30 ≈ 260 m ³ / month, and according to the present embodiment, if the measurement is performed once per hour (general measurement data is for regular observation), if one measurement is taken as 2 minutes, then 2 l / time × 24 × 30 ≒ 2m ³ / month, which means that the consumption can be saved extremely. Since water quality is measured at multiple points in one system from the multipoint chlorine injection orientation, the above consumption appears to double the effect of the measurement points, and an extremely large effect can be expected.

〔The invention's effect〕

According to the present invention, the water flow control valve adds a time width required for stabilizing each of the plurality of electric signals output from the converter from a predetermined time and a sampling time width capable of obtaining stable data. Since it is opened for the duration of time, the consumption of measured water can be reduced and the reliability of the detected water quality data can be secured.

[Brief description of drawings]

FIG. 1 is an apparatus configuration diagram of an embodiment of the present invention, FIG. 2 is a target system configuration diagram, FIG. 3 is an operation explanatory diagram of FIG. 1, and FIG. 4 is an apparatus configuration diagram of another embodiment of the present invention. , FIG. 5 is a diagram for explaining the operation of FIG. 6-1 ... Control valve, 6-2 to 6-4 ... Detector, 8 ...
One shot timer circuit.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hosaku Suzuki 5-2-1 Omika-cho, Hitachi City, Ibaraki Prefecture Hitachi Ltd. Omika Plant, Ltd. (72) Inventor Masaharu Takeda 3-chome, Saiwaicho, Hitachi City, Ibaraki Prefecture No. 2-1 within Hitachi Engineering Co., Ltd. (56) Reference JP-A-57-118157 (JP, A) JP-A-56-12546 (JP, A)

Claims (1)

[Claims] 1. A water quality remote monitoring and control device for centrally managing water quality data measured at each controlled station of a distribution pipeline network to a central control station, and measuring water intake branched from the distribution pipeline network. A water flow control valve and a plurality of water quality detectors are provided in the branching path for the converter, and a converter that converts the water quality level obtained by the plurality of water quality detectors into an electric signal and outputs the electric signal, and a converter that outputs the electric signal. A water flow control device for controlling the water flow control valve to open over a time width obtained by adding a sampling time width capable of obtaining stable data to a time required for stabilizing each of the plurality of electric signals. Water quality remote monitoring control device.