KR100796261B1 - Low-power remote level control apparatus of water tank using wireless communication - Google Patents

Abstract

The present invention relates to a low-power remote water level control apparatus for a water tank by wireless communication, the water tank for storing a predetermined amount of water; A water supply pipe for transmitting water supplied from a pump to the water tank; A high level sensor for detecting that the water level in the water tank reaches a high level point; A low water level sensor that detects the amount of water in the water tank reaching a low water level point; A low speed microprocessor and a high speed microprocessor operated by a battery power source, the low speed microprocessor controls the sensing operation at the high level sensor or the low level sensor, and the high level microprocessor detects the detected level detection signal. Transmitter for transmitting to the receiver via a repeater; A repeater operated by a power source of the battery and amplifying the water level detection signal transmitted from the transmitter to a predetermined level and relayed to a receiver; A receiver for receiving a water level detection signal transmitted from the transmitter via the repeater; It includes a pump controller for controlling the operation of the pump in accordance with the water level detection signal received from the receiver to adjust the supply state of the water. Therefore, the present invention reduces the power consumption of the transmitter and repeater by adjusting the water level measurement and data transmission cycles, and reduces the standby state of reception, extends the life of the battery, and increases the service life of the device. Reduce costs

 Water Tank, Water Level Control, Pump Control, Wireless Communications, Transmitter, Repeater, Low Speed Microprocessor, High Speed Microprocessor, Wireless Module, Clock Speed, Power Consumption, Transmission Cycle

Description

Low-power remote level control apparatus of water tank using wireless communication

1 is a block diagram showing a water tank low-power remote water level control apparatus by wireless communication according to the present invention.

Figure 2 is a block diagram showing in detail the transmitter according to the present invention.

3 is a control flowchart showing an operating state of a transmitter according to the present invention;

Figure 4 is a block diagram showing in detail the repeater according to the present invention.

5 is a control flowchart showing an operating state of the repeater according to the present invention;

<Description of the symbols for the main parts of the drawings>

10 receiver 11 pump controller

12: pump 20: transmitter

21: battery (solar cell) 22: high water level sensor

23: low water level sensor 24: high water level

25: low water point 26: water tank

27: water pipe 30: repeater

31 battery (solar cell)

The present invention relates to a remote water level control device for a water tank, and more particularly, to a water tank low power remote water level control device by wireless communication that reduces power consumption of a transmitter and a repeater.

In general, the remote measurement system is to monitor the site situation far from the site, and refers to the measurement system that can be confirmed and controlled in real time using a communication network in the field situation that changes at a remote construction site.

As one of such remote measurement systems, a conventional remote water tank level control device includes a sensor (electrode) for measuring the water tank level on the transmitter side, a transmitter for measuring the sensor value and transmitting it as wireless data, and a receiver. It is composed of a repeater for extending the distance to the receiver, a receiver for receiving the retransmitted data from the repeater and a pump control unit for controlling the pump with the transmitted data.

In this case, in the case of the transmitter and the repeater, a battery or a solar cell is often used as a power supply means. At this time, the power consumption is reduced as much as possible to increase the use time of the battery or reduce the capacity of the solar cell, thereby reducing installation and maintenance costs. There is a number. In particular, it is possible to measure the specific phase water level of the water level control device of the water tank at a relatively long interval of about 1 minute to 5 minutes, and transmit it to the receiver to control the pump.

However, conventionally, since only one high-speed microprocessor is used, power consumption during standby is increased, and in the case of a repeater, the wireless module always receives data in a standby state, and transmits transmission cycle data to reduce reception standby power. There was a problem that the power consumption of the battery increases.

Accordingly, the present invention has been made to solve the above-mentioned conventional problems, and it is possible to reduce the power consumption of the transmitter and repeater and to extend the life of the battery by adjusting the water level measurement and data transmission period, and reducing the reception standby state. It is an object of the present invention to provide a water tank low power remote water level control device by wireless communication.

Water tank low-power remote water level control apparatus by wireless communication according to the present invention for achieving the above object, the water tank for storing a predetermined amount of water; A water supply pipe for transmitting water supplied from a pump to the water tank; A high level sensor for detecting that the water level in the water tank reaches a high level point; A low water level sensor that detects the amount of water in the water tank reaching a low water level point; A low speed microprocessor and a high speed microprocessor operated by a battery power source, the low speed microprocessor controls the sensing operation at the high level sensor or the low level sensor, and the high level microprocessor detects the detected level detection signal. Transmitter for transmitting to the receiver via a repeater; A repeater operated by a power source of the battery and amplifying the water level detection signal transmitted from the transmitter to a predetermined level and relayed to a receiver; A receiver for receiving a water level detection signal transmitted from the transmitter via the repeater; It characterized in that it comprises a pump controller for controlling the operation of the pump in accordance with the water level detection signal received from the receiver to adjust the supply state of the water.

The transmitter and the repeater may be configured to reduce the power consumption of each battery by operating the driving power on / off at predetermined intervals preset in the low speed microprocessor. The operation periods of the transmitter and the repeater are synchronized with each other according to a time interval preset in each low speed microprocessor, and are set to a time of about 1 minute or more and 5 minutes or less. The transmitter combines and transmits a synchronization signal to a level detection signal to be transmitted, and the repeater performs an on / off operation of power according to the synchronization signal. The battery for supplying power to the transmitter and repeater is preferably a solar cell. The repeater, after receiving the initial data re-transmits the data after turning off the power of the wireless communication module receiving unit to supply the power immediately before the data comes in.

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

1 is a block diagram showing a water tank low-power remote water level control apparatus by wireless communication according to the present invention.

As shown, the present invention is a battery and solar cell without the use of commercial power in general in the water tank level control device for wireless communication in order to implement the low power of the transmitter and repeater in the water tank level control device by wireless communication Since the transmitter and repeater using a low power is implemented, it increases the service life of the battery or reduces the capacity of the solar cell, thereby increasing the service life of the device and reducing installation and maintenance costs.

To this end, the present invention includes a receiver 10, a pump controller 11, a pump 12, a transmitter 20, a battery (solar cell) 21, a high water level sensor 22, a low water level sensor 23, a high water level ( 24, the low water point 25, the water tank 26, the water pipe 27, the repeater 30, the battery (solar cell) 31.

The water tank 26 stores a predetermined amount of water, and the water supply pipe 27 sends water supplied from the pump 12 to the water tank 26.

The high water level sensor 22 detects that the water level in the water tank 26 reaches the high water level point 24, and the low water level sensor 23 detects that the water level in the water tank 26 reaches the low water level point 25. do.

The transmitter 20 is operated by a power source of the battery 21 and is operated by being turned on / off at a predetermined period set in a predetermined timer, thereby reducing the power consumption of the battery 21 and a high speed microprocessor 212. A microprocessor 215 is provided, and the low speed microprocessor 212 is used to control the sensing operation at the high water level sensor 22 or the low water level sensor 23, and the high speed microprocessor 215 is used to sense the sensing. The water level detection signal is transmitted to the receiver 10 via the repeater 30.

The repeater 30 is operated by a power source of the battery 31 and is operated by being turned on / off at a predetermined cycle which is set in advance in a built-in timer, so that the low speed microprocessor 311 reduces power consumption of the battery 31 and A high speed microprocessor 314 is provided, and the water level detection signal transmitted from the transmitter 20 is amplified to a predetermined level and relayed to the receiver 10.

The receiver 10 receives the water level detection signal transmitted from the transmitter 20 via the repeater 30.

The pump controller 11 controls the operation of the pump 12 according to the water level detection signal received from the receiver 10 to adjust the water supply state.

The operation periods of the transmitter 20 and the repeater 30 are synchronized with each other according to a time interval preset in each of the low speed microprocessors 212 and 311, and the time is about 1 minute or more and 5 minutes or less. Is preferably set to.

The transmitter 20 combines and transmits a synchronization signal to a transmitted water level detection signal, and the repeater 30 performs on / off operation of power according to the synchronization signal.

Preferably, the batteries 21 and 31 for supplying power to the transmitter 20 and the repeater 30 are solar batteries.

2 is a block diagram illustrating in detail a transmitter according to the present invention, and FIG. 3 is a control flowchart illustrating an operation state of the transmitter according to the present invention.

As shown, the transmitter 20 of the present invention includes a low speed microprocessor 212, a power supply unit 213, a wireless communication module transmitter 214, a high speed microprocessor 215, and a water level sensor 216. And setting dip switch 217.

The transmitter 20 of the present invention configured as described above first determines whether the high speed microprocessor 215 and the wireless communication module transmitter 214 are in the off state (S01) by the low speed microprocessor 212. (S02). Accordingly, in the transmission period, the low speed microprocessor 212 is initialized and the power required for signal processing such as the high speed microprocessor 215 and the water level sensor 216 is turned on (S03 to S04). Thereafter, the sensing of the sensor and the corresponding transmission period are calculated, and the transmission period is signaled to the low speed microprocessor 212 (S05 to S06). Accordingly, the device and sensor identification number, the sensor data, and the transmission period are combined to generate wireless data, the wireless communication module transmitter 214 is turned on, and the wireless data stream is transmitted using the high speed microprocessor 215. (S07 to S09).

4 is a block diagram illustrating in detail the repeater according to the present invention, and FIG. 5 is a control flowchart illustrating an operation state of the repeater according to the present invention.

As shown, the repeater 30 of the present invention includes a low speed microprocessor 311, a power supply unit 312, a wireless communication module transmitter 313, a high speed microprocessor 314, and a wireless communication module receiver 315. ) And the setting dip switch 316.

The repeater 30 of the present invention configured as described above first initializes the low speed microprocessor 311 to the transmission cycle time (S10), and turns off the high speed microprocessor 314 and the wireless communication module transmitter 313 (S11). . Thereafter, the low speed microprocessor 311 determines whether the transmission period is applied, and in the case of the transmission period, the high speed microprocessor 314 and the wireless communication module receiver 315 are turned on (S12 to S13). Subsequently, when wireless data having the same device identification number as that of the repeater is received, the low speed microprocessor 311 is initialized with a reception preparation spare time (S14 to S15). Accordingly, after the transmission data is extracted, the transmission data is transmitted to the low speed microprocessor 311, the wireless communication module receiver 315 is turned off, and the wireless communication module transmitter 313 is turned on (S16 to S17). Thereafter, the wireless data stream is retransmitted using the high speed microprocessor 314 (S18).

Referring to the operation of the present invention configured in this way in more detail as follows.

As shown in the present invention, in the case of the transmitter 20 and the repeater 30, a solar cell is often used as the battery 21 and 31, in which case the power consumption of the battery 21 and 31 must be reduced as much as possible. Increased operating time or reduced solar cell capacity can reduce installation and maintenance costs.

Due to the characteristics of the water level control device of the water tank 26 in the present invention, it is possible to measure the water level at a relatively long interval of about 1 minute to 5 minutes and transmit it to the receiver 10 to control the pump 12. Since the low water level point 25 of the water tank 26 is installed at a height of at least 50 cm from the bottom of the water tank, it is transmitted 1 to 5 minutes after the actual low water level sensor 23 is operated to receive the receiver 10. 1 minute after the high water level sensor 22 is operated because the water does not drop even when the pump 12 on the side operates, and there is a distance of 50 cm or more from the high water level sensor 22 to the overflow, that is, the high water level point 24. 5 minutes later, the water does not overflow even when the pump 12 on the receiving side 10 is turned off.

On the other hand, the communication period of the water tank level regulator by wireless communication is usually 1 minute or more, but the transmission time is less than 0.1 second, and thus, reducing the power consumption during the non-transmission standby time is a great help in reducing the overall power. do. In this case, a microprocessor is usually used to measure time and transmit data to a wireless module. A low speed microprocessor operating at a slow clock speed is sufficient to measure the transmission period, but a high speed microprocessor operating at a high clock speed is required to transmit data to the wireless module.

Therefore, if a transmitter is configured using one microprocessor, there is no choice but to use a high speed microprocessor. Then, the power consumption is increased during the non-transmission time of the wireless data, that is, during the transmission standby time due to the electrical characteristics that increase as the clock speed increases.

Accordingly, in the present invention, the low speed microprocessor 212 for measuring the transmission period controls the power of the high speed microprocessor 215, the wireless communication module transmitter 214, and the water level sensor 216, and the wireless data is a high speed microprocessor. 215 causes processing to reduce transmission standby power.

That is, the transmitter 20 includes a low speed microprocessor 212 and a high speed microprocessor 215 operated by a power source of the battery 21, and the high water level sensor 22 using the low speed microprocessor 212. Alternatively, the low water level sensor 23 controls the sensing operation and transmits the detected water level detection signal to the receiver 10 through the repeater 30 using the high speed microprocessor 215.

In addition, in the case of the repeater 30, the reception should be retransmitted, and even if the wireless communication module transceiver 313, 315 of the repeater 30 is always waiting for reception, it consumes considerable power. To solve this problem, the receiver 30 waits for the first time after the installation of the repeater 30, and after receiving the received data, the power of the wireless communication module receiver 315 is turned off just before the next data comes after the power of the wireless communication module receiver 315 is turned off. Turn on.

To this end, it is necessary to know the transmission period of the transmitter 20 in advance, but it can be set to a fixed time, but for the first installation of the transmitter 20 for a test at least 10 minutes, the transmission transmission time as fast as 10 seconds, Since it is necessary to speed up from 1 minute to 5 minutes later, the transmitter 20 transmits data including the next transmission period when transmitting data.

Therefore, the transmitter 20 and the repeater 30 of the present invention operate by being turned on and off with driving power at predetermined periods preset in each of the built-in low speed microprocessors 212 and 311. A power consumption of 31 is reduced, and each operation period is synchronized with each other according to a time interval preset in each of the low speed microprocessors 212 and 311, and is approximately 1 minute or more and 5 minutes or less. It is preferable to set the time. In addition, the transmitter 20 combines and transmits a synchronization signal to a water level detection signal to be transmitted, and the repeater 30 performs on / off operation of power according to the synchronization signal.

In addition, the repeater 30 for extending the distance between the transmitter 20 and the receiver 10 receives the first data and then retransmits the data and then turns off the wireless communication module receiver 315 and immediately before the data is received. This provides stable data reception while reducing standby power.

The repeater 30 also uses the low speed microprocessor 311 for time measurement and the high speed microprocessor 314 for processing wireless data in the same manner as the transmitter 20, so that the power consumed during the standby period by the clock speed is reduced. Reduce

As such, when the high speed microprocessor consumes one of the high speed microprocessors 212 and 311 and the high speed microprocessors 215 and 314 together, the speed of the microprocessor is clocked. Assuming that the speed ratio of the high speed microprocessor is T%, and the clock speed of the low speed microprocessor is X% of the high speed microprocessor clock speed, the power consumption D% is lower than that of the conventional system. ].

Then, if the operating time ratio of the high speed microprocessor is 1% and the low speed microprocessor clock speed is 1% of the high speed microprocessor clock speed, it is only 2.01%. In addition, the power consumption is reduced by the time to turn off the wireless module receiver 315 for reception in the repeater 30, and because the transmitter 20 notifies the repeater of the transmission cycle in advance, while the repeater 30 implements low power. It has been shown that the transmitter 20 can actively convert the transmission period according to the state and time of the sensor.

The current consumption of the real system using a high-speed microprocessor and the repeater always waits after receiving the data and compares the conventional system and the system constructed using the present invention are shown in Table 1 below. The system specifications are as follows.

Transmission cycle: 2 minutes

Transmission time: 0.1 seconds

High Speed Microprocessor (4Mhz) Current Consumption: 3.2mA

Low speed microprocessor (31.25kH operation) current consumption: 0.025mA

Wireless module transmitter: 30 mA

Wireless module receiver: 5.6 mA

-Receive ready time for receiving this patent repeater: 1 second

transmitter Repeater Old way Method according to this patent Old way Method according to this patent 3.23 mA 0.05 mA 8.83 mA 0.097 mA

Therefore, according to the present invention, it is possible to significantly reduce the power consumption of the transmitter and the repeater of the water tank level control apparatus by wireless communication.

Although the preferred embodiments of the present invention have been illustrated and described above, the present invention is not limited to the above-described embodiments, and the present invention is not limited to the above-described embodiments without departing from the spirit of the present invention as claimed in the claims. Various modifications can be made by those skilled in the art, and such modifications are intended to fall within the scope of the appended claims.

As described above, according to the water tank low-power remote water level control apparatus according to the present invention, the water level measurement and data transmission period are adjusted, and the standby standby state is reduced to reduce power consumption of the transmitter and the repeater, and the battery It extends the service life of the device, increases the service life of the device and reduces the installation and maintenance costs.

Claims (6)

A water tank for storing a predetermined amount of water; A water supply pipe for transmitting water supplied from a pump to the water tank; A high level sensor for detecting that the water level in the water tank reaches a high level point; A low water level sensor that detects the amount of water in the water tank reaching a low water level point; A low speed microprocessor and a high speed microprocessor operated by a battery power source, the low speed microprocessor controls the sensing operation at the high level sensor or the low level sensor, and the high level microprocessor detects the detected level detection signal. Transmitter for transmitting to the receiver via a repeater; A repeater operated by a power source of the battery and amplifying the water level detection signal transmitted from the transmitter to a predetermined level and relayed to a receiver; A receiver for receiving a water level detection signal transmitted from the transmitter via the repeater; And a pump controller for controlling the operation of the pump according to the water level detection signal received from the receiver to adjust the supply state of the water. The method of claim 1, The transmitter and repeater The water tank low-power remote water level by wireless communication, characterized by reducing the power consumption of each battery by operating the driving power is turned on / off in a predetermined period set in each of the low-speed microprocessor provided in the transmitter and the repeater, respectively Regulator. The method of claim 2, The operation period of the transmitter and repeater, A water tank low power remote water level control device by wireless communication, wherein the low speed microprocessor is synchronized with each other according to a predetermined time interval and is set to a time of 1 minute or more and 5 minutes or less. The method of claim 2, The transmitter combines and transmits a synchronization signal to a water level detection signal to be transmitted, and the repeater is a water tank low power remote water level control device for wireless communication, characterized in that for performing the on / off operation of the power supply in accordance with the synchronization signal. The method of claim 1, The battery for supplying power to the transmitter and the repeater is a water tank low-power remote water level control device, characterized in that the solar cell. The method of claim 1, The repeater is a water tank low power remote water level control device for wireless communication, characterized in that after receiving the first data after the data retransmission to turn off the power of the wireless communication module receiving unit to supply the power immediately before the data enters.

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