KR950011544B1 - The quality of water automatic measuring control system - Google Patents

Abstract

The device improves the environment development efficiency, and easily analyzes the previous measurement value about accuracy level, density, temperature. The device includes ; the driver(100) having the D/A converter(10) and the relay driver(104), the V/I converter(102), calibrator(103), the relay(105); the sensing converter(400) having thesencor(410), the A/D converter(401), the clock generator(403), the clock divider(404), the RAM microprocessor(402), the ROM(406) ; the controller(600) having the input unit(612), the display unit(610), the transmitters(601,603,604), the microprocessor(602), the ROM(611), the RAM(607); the displaying unit(800) having the transmiter device(801), the serial/parallel converter(815), the microprocessor(813), the ROM(802), the printer(811).

Description

Water quality automatic measurement control device

1 is an overall block diagram of the present invention.

2 is an overall flow chart of the present invention.

3 is a block diagram of a sensor converter (SCS).

4 is a block diagram of an ACS.

5 is a block diagram of an display device AMS.

6 is a block diagram of the drive ADS.

* Explanation of symbols for main parts of the drawings

100: driving device 101: D / A conversion element

102: V / I conversion element 103: control circuit

104: relay driving element 105: relay

106, 605, 807: Keypad 107: Relay ON / OFF LED

400: sensor inverter 401: A / D conversion element

402, 602, 813: microprocessor 403: clock generator

404: clock divider 405, 601, 603, 604, 801: transmission element

406, 611, 802: ROM 410: Detector

600: controller 606, 808: input element

607, 804 RAM 608 Display

609: drive element 610: set value display unit

612, 809: input unit 614: display drive element

800: display device 815: serial / parallel conversion element

803: measured value display 805: print drive element

806: print 810: measured value display unit

811: printing apparatus 814: display device driving element

900: external computer

The present invention relates to a pollution measurement and control device, and more particularly to an automatic water quality measurement and control device.

Conventional electro-electronic measuring devices for measuring concentrations of various water quality are mainstream instruments that indicate and display only the instantaneous measurement value as each individual measuring device according to the type of water quality, so users are continuously changing the measurement value. In order to obtain the recording data, it was necessary to connect a separate recording device (eg, recorder, etc.) to the measuring device to maintain continuous recording of the measured value, and it was inconvenient to measure by moving the measuring device to the measuring place.

In addition, when measuring comprehensive water quality (e.g. COD-chemical coral demand, DO-dissolved oxygen content, PH-hydrogen ion concentration, flow rate, water temperature, etc.) at the same time, all the independent measuring instruments should be installed. It is not only cumbersome to measure the operation of each device, but also takes a lot of time, so it takes a lot of time and manpower when recording, preserving, and comparing comprehensive measuring devices and controlling external devices according to the measured values. And many unreasonable points that require facility.

In order to solve this problem, the present invention inputs the signal detected by the detector on the amount of wastewater discharge and the water quality to a comprehensive microprocessor, and continuously displays each measured value by a program, and displays the measured value. The signal output from each detector is directly input to the detector signal converter (SCS) in the field for the purpose of comprehensively measuring, managing and controlling the values detected from the multiple detectors in the processor. The signal value (4-20 kHz) is converted into a digital signal and transmitted so that the distance to the detector signal is not limited.

The sensor value converted into a digital transmission signal is input to the control unit (ACS) and sequentially transmitted to the display unit (AMS). At the same time, the display unit (AMS) substitutes the value detected from the detector into the actual measurement calculation formula and calculates and calculates the calculated value. The concentration and flow rate values are displayed on its own measured value display unit, and are output to the printer for comprehensive comparison and analysis of each sensor, and are transmitted to an external host computer through a control device, and a signal is transmitted to an ADS. It transmits to control external devices, and all functions are executed by software (flow diagram) which is processed by hardware (block diagram) and microprocessor.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

The sensor converting device 400 converts the detected analog signal into a digital signal and transmits the signal to the display device 800 by receiving an output of the sensor converting device 400 and outputting the control value to the display device 800. The control unit 600 and the control unit 600 are stored in the RAM embedded in the 402 to be displayed on the set value display unit, and when the set values are matched, a signal is sent to the driving device to output the relay contact to the outside by the input signal. ) And a display device 800 for outputting data according to a user's needs to a screen or a printer.

The sensor converter 400 includes an A / D conversion element 401 for converting an input sensing signal into a data value of a predetermined bit, a clock generator for transmitting a clock to the clock divider 404 and the microprocessor 402. 403, a RAM embedded microprocessor 402 which receives a signal output from a clock divider 404 and an A / D conversion element 401 for dividing an input clock, and proceeds with programming of an embedded RAM. ROM (406) and a transmission element (405) for transmitting a signal transmitted from the microprocessor (402) to the control device (600) in series.

The control device 600 includes a microprocessor 602 for processing execution of input signals, a read-only ROM 611 for storing control programs, a RAM 607 for storing signals input from a keyboard, and data input. Keyboard (MDI) 612, a set value display unit 610 for displaying time and various numerical values by data input from the input unit 612, and a drive element for driving the drive device 100 as necessary. 609 and transmission elements 601, 603, 604 for controlling the transmission and reception of data.

The display device 800 includes a microprocessor 813 for performing numerical measurement reading and writing by means of signals and measurement programs sent from the control device 600, a read-only memory ROM 802 for storing measurement programs; And a RAM 804 for storing arithmetic processed signals, and a printer device 811 composed of a print drive element 805 and a printer 806.

The operation and effects of the present invention configured as described above are as follows.

Among the power sources in which the AC power is converted into constant voltages of DC5V and DC12V in the power supply device (PRS), DC24V is used for power of each detector, and DC5V is supplied to the power terminal of each element used in the detector converter 400.

The current value of 4-20 [kW] output from each detector of 8 channels is input to the detector converter 400 and is connected to a resistance of 250 [Ohm] in series and converted into a voltage of IV-5V.

The voltage converted into IV-5V is input to the A / D conversion element 401 which divides into 256 steps and converts the data into 8-bit data values as shown in Table 1, and inputs them to the microprocessor 402 as 8-bit data values. do.

TABLE 1

In the microprocessor 402, the internal RAM is built-in, so that 8 channels of detectors are sequentially selected, and each sensed value is input to the microprocessor 402 in 8 bits, and the control device is connected in series through the transmission element 405. The sensed value is transmitted to 600, and this operation is performed by the programmed sequence of the external ROM 406, which is programmed by the cycle of 11.0592 MHz output from the clock generator 403.

The A / D conversion element 401 also needs a clock of 300 Hz to 500 Hz, but the clock output from the clock generator 403 is halved from the clock divider 404 to synchronize with the microprocessor 402. 5 is divided so that a clock of 345.6 kHz is input to the A / D conversion element 401.

The detection signal value transmitted in series from the detector converter 400 is input to the microprocessor 602 through the transmission device 601 from the control device 600 and transmitted to the display device 800 through the transmission device 603. And also to the external computer 900 via the transmission element 604.

When the user inputs the control setting value of each channel on the keypad 605 of the control device 600, the signal value is input to the microprocessor 602 through the data input element 606 and stored in the RAM 607. The display drive element 614 displays the numerical value of the set value to the user as a digital value.

In each channel, the measured value measured by the detector is continuously compared with the value set by the user, and when the set value and the measured value coincide, the corresponding data signal is transmitted to the driving device 100 through the driving element 609.

Such a function is made possible by a program which runs hardware (block diagram of FIG. 4).

The main content programmed in the ROM 611 is a program for transmitting a value input to the detector converter 400 to the display device 800, a program for storing and displaying control set values in the RAM 607, The keyboard 612 includes an input program, a program for transmitting the corresponding data to the driving device 100 when the set value and the measured value match.

Input the 8 channel detection signal value outputted from the control device 600, and the input 8 channel serial data is transmitted to the microprocessor 813 by the serial / parallel conversion element 815 to be programmed in the ROM 802. The measured value calculated by the associative formula thus obtained is transmitted to the control device 600 in the reverse order. In addition, the measured value is displayed to the outside through the display driving element 814 of the display device 800, and the measured value is stored in the RAM 804, the printer through the printer driving element 805 if necessary At 806, the values computed by each detector are output.

The basic formula for each operation is a program for converting the serial value of the sensor into 8-bit in the ROM 802, a program for storing the value input from the keypad 807 in the RAM 804, and a measurement value of 8 channels externally. It is composed of a display program that can be used, a calculation program that can calculate a measured value by substituting a sensor value into each calculation formula, and a printer driving program that stores each data in RAM 804 so that each information can be read out. The variable, date, time, etc. for each function are stored in the RAM 804 via the microprocessor 813 through the input element 800 when the user directly inputs the data on the keypad 807.

In order to convert the digital value of the data transmitted from the control device 600 into an analog value, the value shown in Table 1 is inversely output to the D / A conversion element 101 to output an analog value of 0-5 [V]. Output to

In addition, if a voltage of 0-5 [V] is applied to the V / I (voltage / current) conversion element 102 to output a voltage of 0-5 [V] to 4-20 mA, a current of 4-20 mA is generated. It is output to the outside. The V / I conversion element 102 is immersed in the zero adjustment at 4 Hz and the span adjustment circuit 103 at 20 Hz.

As described above, the analog signal for the detected and detected value is outputted as an analog signal of voltage and current by a calculation formula.

When the user sets four points in the maximum and minimum intermediate ranges for each channel in the control device 400, the corresponding data is input from the control device 400 to the drive device 100 so that the relay drive element Through 104, signals from four relay 105 contacts are output to the outside.

In addition, in case of disregarding the driving of the relay 105 for the set value and manually driving the relay according to the situation, if the relay forced ON and OFF are input through the keypad 106, the signal is directly transmitted to the control device 400. This allows the relay to be driven manually.

The light emitting diode 107 is connected to the relay driving element 104 in parallel with the relay driving element 104 in order to identify the display and the operation state of the relay 105 when the driving of the relay 105 is manually and automatically.

EXAMPLE

end. Measurement of runoff

If the output of all detectors is 4-20 어느, any one can be selected considering the field conditions. The flow rate flowing through a standardized passage (fashallpollum) is calculated by the following internationally recognized empirical formula.

Where A is the capacity of the tank, Ha is the level of the flow rate, and K is the constant. The flow measurement formula (experimental formula) according to this is defined as follows.

TABLE 2

Ha: Water level in the upstream [Cm]

Q: [M3 / Hr]

Since the formula for calculating the flow rate for each parshall plume is programmed in the ROM in the display device (AMS), it is possible to realize the flow rate measurement at many places such as inflow and outflow. In addition, the setpoint can be used to sound an alarm buzzer for dangerous water level and to automatically and manually operate the pump for low water level.

The continuous change of the measured value can be printed manually and automatically through the printer. The output data of the measured value is as follows.

1. Operation Information

2. Basic Information

3. Information about time

Average information over time

As such, in order to briefly grasp the change in the flow rate in addition to the numerical result, the method of displaying the graph is useful, so that the present invention can be output after the graphic calculation process, and the results are as follows.

4. Graph output

I. Measurement of chemical oxygen demand by ultraviolet absorbance method

When measuring the oxygen demand of the water quality, there are many differences from the value obtained by the chemical measurement method according to the type of water quality, so that the scatter diagrams of the measured value obtained by the chemical measurement method and the measured value obtained by the absorbance method are prepared. The trouble of having to calculate the COD value month by substituting the obtained measured value into the scatter diagram was a problem, but in the present invention, the scatter diagram was stored in the internal RAM 804 element of the display device 800, and the chemical oxygen demand was measured by the absorbance method. In this case, light such as mercury lamp is transmitted through the sample water, and the wavelength band of 254nm in the ultraviolet region and 546nm in the visible region is detected using the lens of the bandpass filter and the amount of light is converted into an electrical signal (4). -20 kHz) to convert the analog signal input from the detector to a data signal and the scattered value stored in the RAM 804 element After allowing dynamic contrast to hayeoteumeuro that the measurement is output to which the above problems can be solved.

The use of the control device for the measured values and the contents of the printer data were carried out in the same or similar manner to the method for measuring the flow rate.

All. Hydrogen ion concentration measurement

When measuring the concentration of hydrogen ions, a calcium chloride (KCL) solution is embedded in the electrode, which causes an electrical reaction when combined with hydrogen ions (PH) leaked out of the wastewater in a small amount. Measurement and control were carried out through a microprocessor programmed as described above using a known PH detection dedicated sensor to output.

As described above, the temperature and dissolved oxygen amount of the water are also connected to the sensor converter 400 of the present invention using a dedicated sensor, thereby providing comprehensive automatic water quality control.

In this way, the present invention can be used to measure accurate flow rate, concentration of water quality, temperature of water quality, etc., regardless of time, in any environment by using a control device and a display device with a built-in programmed microprocessor. By inputting a value, a warning is issued when the concentration of wastewater exceeds the standard value, and immediate action is taken to prevent the spread of pollution and to preserve the measured value semi-permanently in the device. Since the comparative analysis is easy, there is an effect to increase the utilization in environmental improvement.

Claims (1)

In the water quality display device for measuring the concentration of various water quality, comprising a drive device 100, a sensor converter 400 including a plurality of sensors 410, the control device 600 and the display device 800 As the automatic water quality measurement and control device, the driving device 100 includes a D / A conversion device 101 and a relay driving device 104 and a D / A conversion device that take an output signal of the control device 600 as an input. Is driven by the V / I conversion element 102 for converting the output voltage of the 101 into a current, the adjustment circuit 103 for adjusting the deviation of the V / I conversion element 102, and the relay driving element 104. The control unit comprises a relay 105, a relay ON / OFF display LED 107 indicating an ON / OFF state of the relay 105, and a keypad 106 which is an input unit for controlling the operation of the relay 105. Receives the control signal of the device 600 and outputs the control signal according to the external, and the detector conversion field 400, a plurality of detectors 410 for detecting an external signal, an A / D converter 401 for converting an output signal of the detector 410 into a digital value, a clock generator 403 for generating a clock, A clock divider 404 for dividing the output of the clock generator 403, a RAM embedded microprocessor 402 managing an external signal sensing function, and a program to be executed by the microprocessor 402. A ROM (406) and a transmission element (405) for transmitting the output signal of the sensor converter (400) to convert an external signal into a digital signal and to transmit it to the control device (600); The control device 600 includes an input unit 612 for inputting a key, a setting value display unit 610 for displaying a set value, and a transmission element (601, 603, 604) for transmitting data to or receiving data from the outside. A drive element 609 for driving the drive device 100, a microprocessor 602 for managing the functions of the control device 600, a ROM (611) with a built-in program, and a RAM as a storage element. (RAM) 607 and transmit the data input from the sensor converter 400 to the display device 800 and the external computer 900, and if the set value and the measured value match, the drive device 100 ); The display device 800 includes an input unit 809 for inputting a key, a measurement value display unit 810 for displaying measurement values, a transmission element 801 for receiving data from the outside, and the transmission element 801 A serial / parallel conversion element 815 for converting serial data, which is the output of the data into parallel data, a microprocessor 813 for managing the functions of the display device 800, a ROM (802) with a built-in program, RAM 804, which is a memory device, and a printer device 811, which is an output device, are configured to display the measurement signal transmitted from the control device 600 according to a user's key input. Automatic water quality control device characterized in that the output to the printing device (811).