KR200293159Y1 - An unmanned water-supply apparatus - Google Patents

Abstract

The present invention relates to an unmanned water supply device, and more particularly, to install a small hydro and wind power generators that generate power by the drop pressure of the water and the wind when supplied to a reservoir for collecting and storing the pumped water from the well. The electricity generated from the small generator is used to precisely measure the water level of the water flowing into the reservoir electronically, and to transmit the measured water level information wirelessly to the control unit of the inlet water supply device installed in Jangok, The present invention relates to an unmanned water supply device capable of preventing the freezing of pipes in winter by operating a heater when the air temperature drops below a predetermined temperature by measuring.

To this end, the present invention supplies the water drawn from the submersible pump 27 to the storage tank 30 through the pipe 25, and detects the water level of the ground water and the storage tank 30 by the groundwater detection sensor 26. Unmanned water supply control unit 10 for controlling the pump 27 is provided, the reservoir 30 is a small hydro generator 40 for generating power by the pressure of the falling water and the small wind power for generating power by the wind Generator 50 is installed, the unmanned water supply having a self-powered power supply unit 46 for generating a DC power to the power output from the generator 40, 50 to charge the battery, and outputs the charged power at a constant voltage In the apparatus, the water level sensor 60 and the water level sensor 60 is installed inside the reservoir 30 to change the capacitance according to the water level of the water level to detect the level of water by the change of the capacitance, and the water level sensor 60 Connected to the output of The time constant due to the capacitance varying according to the water level of the air storage tank 30 is changed, and the signal converter 70 converts the water level level information into a clock and outputs it, and is connected to an output terminal of the signal converter 70 and outputs as a clock. Of the storage tank 30 which is connected to one end of the unmanned water supply control unit 10 and the wireless transmitter 80 which transmits the water level level information to the ultra high frequency (UHF) wirelessly. And a wireless receiving unit 90 for receiving, demodulating and outputting the water level level information, wherein the unmanned water supply device controller 10 includes an underwater pump according to the water level level information of the storage tank 30 transmitted from the wireless receiving unit 90. 27), the water level sensor 60, the signal converter 70, the wireless transmitter 80 is characterized by being operated by the power supplied from the self-powered power source 46.

Description

Unmanned water-supply apparatus

The present invention relates to an unmanned water supply device, and more particularly, to install a small hydro and wind power generators that generate power by the drop pressure of the water and the wind when supplied to a reservoir for collecting and storing the pumped water from the well. The electricity generated from the small generator is used to precisely measure the water level of the water flowing into the reservoir electronically, and to transmit the measured water level information wirelessly to the control unit of the inlet water supply device installed in Jangok, The present invention relates to an unmanned water supply device capable of preventing the freezing of pipes in winter by operating a heater when the air temperature drops below a predetermined temperature by measuring.

In general, it is impossible to install water supply in an island or a mountain wall, and most of them depend on groundwater, and the pumped water is supplied through a water pipe to a reservoir installed at a predetermined position. The unmanned water supply system for controlling the series of processes of supplying and blocking the groundwater to the water tank by using the water supply device is widely used.

That is, FIG. 1 is a schematic diagram of a general unmanned water supply device, and an underwater pump 27 for elevating groundwater in a well is installed, and a discharge amount of groundwater is provided in a pipe 25 for transporting groundwater discharged from the underwater pump 27. A pressure sensor for sensing the pressure applied between the valve 21 to be adjusted, the water meter 22 to measure the discharge amount, the check valve 23 to prevent backflow, and the reservoir 30 and the pipe 25 ( 24) are connected to each other, the groundwater detection sensor 26 for detecting the presence or absence of groundwater through the well.

Inside the reservoir 30 for storing the groundwater pulled up from the well via the pipe 25, a buoy 31 that is raised or lowered by the water level is installed, and the pressure sensor 24 and the groundwater detection sensor 26 are provided. ), The pressure sensor 24 is connected to the unmanned water supply control unit 10 installed in the jangok 20.

In the unmanned water supply device configured as described above, the groundwater pumped by the driving of the submersible pump 27 flows into the reservoir 30 through the valve 21 and the pipe 25, and the water level in the reservoir 30 rises due to the continuous supply of water. When the buoy 31 is also raised to close the outlet of the pipe 25, the pressure of the pipe 25 is rapidly increased, the pressure of which is detected by the pressure sensor 24 and transmitted to the unmanned water supply control unit 10. Done.

In addition, the groundwater detection sensor 26 detects the presence or absence of groundwater and transmits the detected signal to the unmanned water supply control unit 10, the unmanned water supply control unit 10 analyzes the signal output from each sensor The operation of the submersible pump 27 is controlled.

That is, when the pressure of the pressure sensor 24 is detected to be above the set level, or when the groundwater is not detected by the groundwater detection sensor 26, the driving of the underwater pump 27 is stopped to supply water to the reservoir 30. Will stop.

The unmanned water supply device operated as described above is to supply the groundwater to the storage tank 30 unattended by controlling the underwater pump 27 by sensing the presence or absence of ground water and the pressure of the pipe 25.

However, in such an unmanned water supply device, the storage tank 30 for storing the water pumped from the well is installed in a place where electricity does not flow in, such as an island or a mountain wall. It is impossible to use, because of this can not detect the water level introduced into the reservoir 30 by an electronic method to detect the pressure applied to the pipe 25 to measure the water level.

When the water level introduced into the reservoir 30 is detected as the pressure applied to the pipe 25 as described above, the pressure to the buoy 31 and the pipe 25 for opening and closing the discharge port according to the rise and fall of the water level inside the reservoir 30. The installation of the detection sensor 24 is essential, and such a float 31 opens the discharge port to lower the pressure of the pipe 25 even when the water level in the reservoir 30 is slightly lowered, thereby reducing the pressure of the water pump 27 and the pressure sensor. The frequent driving of (24) not only causes frequent failures, but also makes it difficult to detect the water level in various stages, thereby degrading precision.

Therefore, the water level inside the reservoir 30 can be precisely measured using various electronic sensors, but it is basically required to supply electricity as a power source, but it is very difficult to supply electricity in the place where the actual reservoir 30 is installed. It is true.

The reason for this is that an unmanned water supply device is required on an island or mountain wall where water supply cannot be installed, and the storage tank 30 of the unmanned water supply device is scattered at a considerable distance from the jangok. This is because huge costs are required, and if a power source is inevitably needed, solar cells are used. However, this is also a situation where the effectiveness of power generation is insignificant due to weather conditions, etc. There is a problem that requires a lot of cost and management personnel to be replaced from time to time.

The present invention is to solve the above problems, a small wind turbine that generates power by using a small hydroelectric generator and wind to generate power by using the pressure drop of water in the reservoir to collect and store the water pumped from the groundwater wells By installing a generator, and charging and regenerating the electricity generated by this small generator into a battery to supply its own power source, this power source uses a condenser whose capacitance changes as the water level changes in the water tank as a water level sensor. The technical task is to enable accurate detection of the incoming water level.

In addition, the present invention to wirelessly transmit the water level information of the water tank detected by the electronic water level sensor using the power source obtained by itself to the control unit installed in the Jangok, the control unit according to the water level information of the water tank received wirelessly It is a technical problem to effectively control the underwater pump pumping groundwater to induce stable operation of the underwater pump to extend its life.

In addition, the present invention is installed by installing a temperature sensor around the jangok, and a heater on the part of the pipe exposed to the ground to operate the heater when the air temperature drops below the freezing point to prevent the freezing of the pipe in winter It is a technical problem that can raise.

1 is a block diagram of a general unmanned water supply device.

2 is a storage equipped with a self-generator in the unmanned water supply device applied to the present invention

Joe's schematic.

3 is a block diagram of an unmanned water supply device according to the present invention.

Figure 4 of the water level sensor and the signal converter in the unmanned water supply device according to the present invention

Diagram.

5 is a diagram illustrating a wireless transmission and reception unit of the unmanned water supply apparatus according to the present invention.

6 is a control flow diagram of the control unit of the unmanned water supply apparatus according to the present invention.

<Explanation of symbols for main parts of drawing>

10: unmanned water supply control unit 20: Jangok 21: valve

22: water meter 23: check valve 25: piping

26: groundwater detection sensor 27: submersible pump 30: storage tank

40: small hydro generator 41: aberration 41a: second shaft

42: first generator 43: regulator 44: battery

45: constant voltage circuit 46: self-generated power supply 47: heater

48: temperature sensor 49: insulation 50: small wind power generator

51 supporter 51a second shaft 52 propeller

53 second generator 60 level sensor 61 first electrode

62: second electrode 70: signal converter 71: water level clock generator

72 reference clock generator 73 mixer circuit 74 amplification circuit

80: radio transmitter 81: modulator 82: high frequency oscillator

83: power amplifier 90: wireless receiver 91: decoder

92: demodulator

Hereinafter, the configuration and operation of the present invention will be described in detail with reference to FIGS. 2 to 6.

FIG. 2 is a patent application published by the present applicant as a block diagram of a storage tank in an unmanned water supply device having a self-generator applied to the present invention (published patent No. 2002-435 38, published date 2002.06.10).

That is, the upper portion of the reservoir 30 is provided with a pipe 25 for introducing water pumped from the well into the reservoir 30, and the reservoir 30 is disposed at a predetermined distance from the discharge port of the pipe 25. The aberration 41 is rotated around the second shaft 41a by the pressure of the water falling, and the second shaft 41a is provided with a first generator for generating electricity by the rotation of the aberration 41. 42 is connected, and a small hydro generator 40 is stored in the battery 44 through a regulator 43 for stabilizing the power output from the first generator 42 to a constant level of DC power.

The upper side of the reservoir 30 is provided with a propeller 52 which is rotated by the wind at the end of the support 51, a second generator 53 for generating electricity by the rotation of the propeller 52 is installed In addition, a small wind power generator 50 for storing the power output from the second generator 53 in the battery 44 through the regulator 43 for stabilizing and providing a constant level DC power is provided.

Power is stabilized at the output end of the aberration 41 which rotates by the pressure of the water falling from the discharge port of the pipe 25 and the first generator 42 which generates electricity by the rotation of the propeller 52 which rotates by the wind power. The regulator 43 is connected to make a DC power of a constant level, the electricity output from the regulator 43 is stored in the battery 44, the battery 44 to drive the various systems with the charged power The constant voltage circuit 45 for outputting a stable power of different levels is connected and configured.

Referring to the working relationship of the unmanned water supply device with a self-generator applied to the present invention made as described above are as follows.

First, when water pumped from the well of the jaundice 20 flows into the storage tank 30 through the pipe 25, the aberration 41 disposed at a predetermined distance from the discharge port of the pipe 25 falls on the hydraulic pressure that drops. When the aberration 41 is rotated, the second shaft 41a is interlocked.

When the aberration 41 and the second shaft 41a are interlocked and rotated, the first generator 42 connected to the second shaft 41a generates and outputs electricity, and the generated electricity is a regulator 43. It is applied to the smooth and rectified to make a stable constant level of DC power source and stored in the battery 44.

As described above, the small hydro generator 40 generates electricity and stores electricity in the battery 44 during the time when water pumped from the well of the jangok 20 flows into the storage tank 30 through the pipe 25.

In addition, electricity is generated by the small wind power generator 50 installed above the storage tank 30 and stored in the battery 44. That is, when the propeller 52 is rotated by the wind, the second shaft 51a connected to the propeller 52 is interlocked with each other.

When the propeller 52 and the second shaft 51a are interlocked with each other, the second generator 53 connected to the second shaft 51a generates and outputs electricity, and the generator generates electricity to the regulator 43. It is applied and smoothed and rectified to produce a stable DC power of a certain level to be stored in the battery 44.

Therefore, electricity is generated during the time when water is supplied to the storage tank 30 by the small hydro generator 40 to generate electricity, and electricity generated by the small wind generator 50 using wind is charged in the battery 44. To maximize the dose.

On the other hand, the electricity charged in the battery 44 is smoothed and rectified in accordance with the constant voltage circuit 45 to output the constant voltage (Vcc1, Vcc2, Vcc3) having a plurality of constant levels, this multilevel electrostatic source This is to supply a variety of electrical and electronic devices and sensors as a driving power source.

Therefore, due to the installation of the small hydroelectric generator 40 and the small wind power generator 50, it is possible to detect the level of water level of the reservoir 30 installed on the island and the mountain wall where electricity is not introduced, as well as electronically, The detected water level information can be wirelessly transmitted to the unmanned water supply control unit 10 installed in the Jangok 20 using a wireless transmission and reception device.

3 is a configuration diagram of an unmanned water supply device according to the present invention, an underwater pump 27 for raising groundwater in a well is installed, and a pipe 25 for transporting groundwater discharged from the underwater pump 27 is used for groundwater. A valve 21 for adjusting the discharge amount, a water meter 22 for measuring the discharge amount, and a check valve 23 for preventing backflow are installed, and the groundwater detection sensor 26 for detecting the presence of groundwater through the well is provided. It is installed, the groundwater detection sensor 26 and the submersible pump 27 is connected to the unmanned water supply control unit 10 installed in the jangok 20.

In addition, an upper portion of the reservoir 30 is provided with a pipe 25 for introducing water pumped from the well into the reservoir 30, and an aberration 41 rotating inside the reservoir 30 by the pressure of the falling water. The small hydroelectric generator 40 is generated by the power generation, and the small wind power generator 50 is generated on the upper side of the reservoir 30 by the rotation of the propeller 52 rotated by the wind.

The output terminal of the small hydro generator 40 and the small wind power generator 50 is connected to a regulator 43 to stabilize the power supply to a DC power of a constant level, the electricity output from the regulator 43 is a battery 44 The battery 44 is connected to a constant voltage circuit 45 for outputting stable power at different levels for driving various systems with charged power.

Here, for convenience, the regulator 43 for stabilizing the power output from the small hydro generator 40 and the small wind generator 50 to a constant level DC power, and the battery 44 outputs the charged power as a stable electrostatic source. The constant voltage circuit 45 is collectively defined as a self-generated power supply 46.

In addition, the reservoir 30 is provided with a water level sensor 60, the capacitance is changed in accordance with the level of water level supplied by the driving power supplied by the self-powered power supply unit 46, the level of the sensor 60 The output terminal is connected to a signal converter 70 for changing the water level level information to a clock by varying the time constant due to the capacitance varying according to the water level level of the storage tank 30. The water level level is connected to the output terminal of the signal converter 70. A wireless transmitter 80 is provided for transmitting information wirelessly on a UHF.

And, on one side of the unmanned water supply control unit 10 installed in the Jangok 20 is a wireless receiving unit 90 for receiving, demodulating and outputting the water level information of the storage tank 30 loaded on the microwaves transmitted from the wireless transmitter 80 Connected, the unmanned water supply control unit 10 is to calculate the information transmitted from the wireless receiver 90 by the internal program to control the submersible pump 27 according to the water level information.

In addition, a heat insulating material 49 in which a heater 47 is installed is installed at a part of the outside of the pipe 25 exposed to the ground, and a temperature sensing sensor sensing the temperature of the air at the other side of the unmanned water supply control unit 10. 48) is connected and the heater 47 is operated to prevent freezing when the air temperature drops below the freezing point.

4 is a configuration diagram of the water level sensor 60 and the signal converter 70 in the unmanned water supply device according to the present invention, the water level sensor 60 is operated by receiving the driving power from the self-powered power supply 46 The two first and second electrode rods 61 and 62 are provided at regular intervals, and when water contacts the first and second electrode rods 61 and 62, the first and second electrode rods 61 and 62 are placed in contact with each other. The capacitance value between the second electrodes 61 and 62 is configured to change.

The signal converter 70 includes a reference clock generator 72 which generates a reference clock at a predetermined cycle when power is applied, and a level sensor 60 composed of the first and second electrode bars 61 and 62. The clock output from the water level information level level clock generator 71 and the reference clock generator 72 and the water level information level level clock generator 71 which generate a clock of a period proportional to the time constant according to the correction capacity And a mixer circuit (73) for mixing and synchronizing the signals, and an amplifier circuit (74) for amplifying and outputting a signal synchronously outputted from the mixer circuit (73). The driving power is supplied from

5 is a block diagram of a wireless transmitter / receiver of the unmanned water supply device according to the present invention, wherein the wireless transmitter 80 codes a clock signal corresponding to the water level level information of the storage tank 30 applied from the signal converter 70. And amplifying an output signal from the high frequency oscillator 82 and the high frequency oscillator 82 which outputs the coded signal output from the modulator 81 in synchronization with microwaves. It is composed of a power amplifier 83 that transmits to the space through the antenna ANT1, the wireless transmitter 80 is configured to receive the driving power from the self-powered power supply 46.

The radio receiver 90 receives the water level information of the storage tank 30 transmitted from the radio transmitter 80 to the second antenna ANT2 and extracts only the water level level information of the storage tank 30 which is code information synchronized with the microwaves. A demodulator 92 and a decoder 91 which decodes the information extracted by the demodulator 92 and transmits the information to the unmanned water supply control unit 10.

If described in detail the working relationship of the unmanned water supply device according to the present invention made as described above.

First, the electricity generated from the small hydro generator 40 and the small wind generator 50 installed in the reservoir 30 is smoothed and rectified through the regulator 43, which is a self-powered power supply unit 46, to a stable DC power of a constant level. It is made and stored in the battery 44, the electricity charged in the battery 44 outputs the constant voltage (Vcc1, Vcc2, Vcc3) having a predetermined number of levels as the constant voltage circuit 45 passes, this electrostatic source Is supplied to the driving power of the level sensor 60, the signal converter 70 and the wireless transmitter 80.

In this case, as shown in FIG. 4, the water level sensor 60 receiving the driving power from the self-powered power supply unit 46 is outputted with a change in capacitance in proportion to the level of water introduced into the reservoir 30. The reference clock generator 72 of the signal converter 70 that receives the driving power from the battery 44 outputs a pulse of a predetermined period.

That is, as shown in FIG. 4, the first and second electrode bars in the state in which power is applied to the two first and second electrode bars 61 and 62 which are the water level detection sensor 60 by the self-powered power supply unit 46. When water is contacted between the 61 and 62, the capacitance value between the first and second electrodes 61 and 62 is proportionally changed and output according to the area of contact. The clock of the period corresponding to the capacitance value between the first and second electrodes 61 and 62 is applied to the water level clock generator 71 of the signal converter 70 which is operated by being supplied with driving power. Will print

Here, the water level clock generator 71 is to change the clock period by the change of the time constant according to the capacitance value of the water level sensor 60.

A clock proportional to the water level of the reservoir 30 output from the water level clock generator 71 is applied to the mixer circuit 73 and synthesized in synchronism with a reference pulse of a predetermined period generated by the reference clock generator 72. The synchronized clock signal is amplified to a predetermined level through the amplifier circuit 74 and transmitted to the wireless transmitter 80.

Accordingly, when the driving power is supplied from the self-generated power supply unit 46 as shown in FIG. 5, the radio transmitter 80 oscillates and outputs the microwave frequency at the high frequency oscillator 82 and at the same time the signal converter in the modulator 81. The clock signal corresponding to the water level level information of the storage tank 30 applied from 70 is coded and transmitted to the high frequency oscillator 82.

The high frequency oscillator 82 outputs the coded water level information applied from the modulator 81 in synchronization with the frequency of the microwave, and this signal is amplified to a predetermined level through the power amplifier 83 to generate a first antenna ( Through ANT1).

In this way, the wireless transmitter 80 receives and decodes the water level information of the storage tank 30 to the unmanned water supply controller 10 by receiving and decoding the wireless receiver 90 connected to the unmanned water supply controller 10 installed in the Jangok 20. By transmitting, the low water level (%) is recognized and the submersible pump 27 is controlled in accordance with the result of the water level information.

That is, the water level information of the storage tank 30 transmitted from the wireless transmitter 80 is received by the second antenna ANT2 of the wireless receiver 90 connected to the unmanned water supply control unit 10 of the wireless receiver 90 and demodulated. As it is applied to the 92, only the water level level information of the storage tank 30, which is code information synchronized with the microwave, is extracted and applied to the decoder 91. The decoder 91 provides the water level level information of the encoded storage tank 30. The decoded and transmitted to the unmanned water supply control unit 10.

The unmanned water supply control unit 10 reads the water level level information of the storage tank 30 transmitted from the radio receiver 90 as shown in the flow chart of FIG. 6 by the built-in program (step 101), where the radio receiver ( If it is determined in step 90 that the water level information is received (step 102), the information received by the internal program is analyzed and calculated (step 103), and then the percentage of water stored in the reservoir 30 in the display device is reduced to a percentage ( %) And control the submersible pump 27 according to the low yield of water stored in the reservoir 30 at the same time (step 104).

That is, when the low yield of the water stored in the reservoir 30 is determined to be a% or more (step 105), the operation of the water pump 27 is stopped to stop the water supply (step 106), and the low yield of the water stored in the reservoir 30 If it is determined to be less than b% (step 107), the water pump 27 is driven to replenish the water supply (step 108) (where a% &gt; b%).

Therefore, in the present invention, by installing the small hydro generator 40 and the small wind power generator 50 in the storage tank 30 to secure driving power by itself, the first and second electrode rods 61 with the power obtained by the self-power generation. By using the electronic water level sensor that detects low yield due to the change in capacitance between 62, it is possible to analyze the level of water level as a percentage, thereby avoiding the technical idea of limiting the detection of only high or low water level in a limited way, thereby improving the precision of the unmanned water supply system. To make it possible.

In addition, according to the present invention, by installing the small hydro generator 40 and the small wind generator 50 in the storage tank 30 to secure driving power by itself, the water level information obtained through the electronic water level sensor with the power obtained by the self-power generation By wirelessly transmitting to the unmanned water supply control unit 10 installed in Jangok 20 by using a wireless transmitter to remove all the conventional complex parts (pressure sensor, the ball, etc.) to provide simplicity of structure and convenience in installation. Of course, it is possible to increase the precision by processing various information electronically.

On the other hand, the temperature sensor 48 installed in the Jangok 20 measures the temperature of the air and transmits the information to the unmanned water supply control unit 10, the unmanned water supply control unit 10 according to the temperature of the atmosphere The heater 47 is controlled.

That is, as shown in FIG. 6, the unmanned water supply control unit 10 reads the resistance value output from the temperature sensor 48 to determine the current temperature of the atmosphere, and the determined temperature of the atmosphere is the freezing point where the ice freezes ( 0 ° C.) or less (step 109), power is supplied to the heater 47 to generate heat (step 110) to a constant temperature, and when the temperature of the air is determined to be equal to or higher than the freezing point where ice does not freeze. The power is cut off (step 111) so as not to generate heat so that the pipe 25 exposed to the ground is not frozen.

As described above, the present invention installs a small wind power generator that generates power by using wind and a small hydroelectric generator that generates power by using the free fall pressure of water in a reservoir that collects and stores the water pumped from the groundwater well. It charges and regenerates the electricity generated from the iso-type generator into the battery to procure its own power source, and uses the condenser whose capacitance changes as the water level changes as the water level sensor as a water level sensor. There is an effect that can be detected accurately.

In addition, the present invention to wirelessly transmit the water level information of the water tank detected by the electronic water level sensor using the power source obtained by itself to the control unit installed in the Jangok, the control unit according to the water level information of the water tank received wirelessly By effectively controlling the submersible pump for pumping groundwater, it is effective to induce stable operation of the submersible pump to extend its life.

In addition, the present invention is installed by installing a temperature sensor around the jangok, and a heater on the part of the pipe exposed to the ground to operate the heater when the air temperature drops below the freezing point to prevent the freezing of the pipe in winter The effect is to increase.

Claims (4)

The water drawn from the submersible pump 27 is supplied to the reservoir 30 through the pipe 25, and the groundwater detection sensor 26 detects the level of the groundwater and the reservoir 30 to detect the water level. The unmanned water supply control unit 10 for controlling is provided, In the reservoir 30, a small hydro generator 40 generating power by the pressure of the falling water and a small wind generator 50 generating power by the wind are installed and output from the generators 40 and 50. In the unmanned water supply device having a self-powered power supply unit 46 for making a power supply to be a direct current power to charge the battery, and outputs the charged power at a constant voltage, A level sensor 60 installed in the reservoir 30 to change the capacitance according to the water level of the water to detect the level of the water level by changing the capacitance; A signal converter 70 connected to an output terminal of the water level sensor 60 to change a time constant due to capacitance varying according to the water level level of the storage tank 30 to change the water level level information to a clock, and A wireless transmitter 80 which is connected to an output terminal of the signal converter 70 and wirelessly transmits water level level information output as a clock on an ultra high frequency wave (UHF); And a wireless receiver 90 connected to one end of the unmanned water supply control unit 10 for receiving, demodulating and outputting water level information of the storage tank 30 transmitted from the wireless transmitter 80, The unmanned water supply control unit 10 controls the submersible pump 27 according to the water level level information of the storage tank 30 transmitted from the radio receiver 90, The water level sensor (60), the signal converter (70), the wireless transmitter 80 is operated by the power supplied from the self-powered power supply unit 46, characterized in that the unmanned water supply device. The water level sensor 60 is provided with two first and second electrode rods 61 and 62 at regular intervals, and when water contacts the first and second electrode rods 61 and 62. Unattended water supply device, characterized in that the capacitance value between the first and second electrode rods (61) (62) is changed according to the area of the contact. The method of claim 1 or 2, wherein the signal converter 70, A reference clock generator 72 generating a reference clock at a predetermined cycle when driving power is supplied from the self-powered power supply unit 46; A water level information level level clock generator 71 for generating a clock of a period in which a time constant is changed according to the correction capacitance of the water level sensor 60, and A mixer circuit 73 for mixing and synchronizing the clocks output from the reference clock generator 72 and the water level information level level clock generator 71; And an amplifying circuit (74) for amplifying and outputting a signal output in synchronization with the mixer circuit (73). The heat insulating material 49 in which the heater 47 was built in the outside of the piping 25 exposed to the ground is provided in Claim 3, The other side of the unmanned water supply control unit 10 is connected to a temperature sensor 48 for sensing the temperature of the atmosphere is configured to prevent the freezing by operating the heater 47 when the temperature of the atmosphere falls below the freezing point Unmanned water supply system.