KR100656213B1 - Current measuring system using bluetooth and cdma wireless communication - Google Patents

Abstract

An apparatus of measuring flow rate of river using bluetooth and CDMA wireless communication is provided to increase measurement accuracy by reducing the difference among measured values which are different depending upon measuring persons. A bluetooth unit(10) is installed on a float, and consists of a micro data transceiver module and a power module. A field measuring control unit(20) detects a signal of the float and stores the signal in a memory to transmit the signal to a server computer(31) through CDMA wireless communication. At least one field measuring control unit is located at start and end points of an interval, respectively. A central control unit(30) receives an identification of the bluetooth unit and information on a signal detecting time to calculate a flow rate on the basis of the information.

Description

River flow rate measurement device using Bluetooth and CDA wireless communication {CURRENT MEASURING SYSTEM USING BLUETOOTH AND CDMA WIRELESS COMMUNICATION}

1 is a block diagram showing the entire stream flow rate measuring apparatus according to the present invention.

Figure 2 is a schematic illustration showing a Bluetooth device which is an essential part of the present invention.

Figure 3 is a schematic explanatory diagram showing a field measurement control unit which is an essential part of the present invention.

Figure 4 is a state of use of the river flow rate measuring apparatus according to the present invention.

5 is an exemplary view of river flow rate information provided via the Internet by the present invention.

* Description of the symbols for the main parts of the drawings *

10: Bluetooth device 11: control module

12: Bluetooth chip 20: Field measurement control unit

21: Controller 22: CDMA wireless communication module

24: Bluetooth transceiver module 30: Central control unit

31: server computer 32: CDMA wireless communication module

The present invention relates to a river flowmeter for measuring the flow rate of the river, and applies the short-range wireless connection method by Bluetooth to the rod, and the measured flow rate is the server computer from the field measurement control unit through the CDMA wireless communication module The present invention relates to a measuring device that can monitor the flow rate of a river wherever it is possible to use the computer and the Internet as well as to quickly and conveniently measure the flow rate.

There is a systematic water resource management to make efficient use of water resources for more useful purposes. Although not all water resources can be managed artificially, at least the current status and information of the water resources can be known in advance, and the sum of these can be regarded as achieving more than expected water resource management. Organic control of freshwater volume through water resources information is the best way to prepare for natural disasters such as droughts and floods and to manage resources efficiently.

Therefore, the adjustment of the freshwater amount cannot be seen as simply opening and closing the water gate according to the flow rate increase and decrease. In other words, in the control of freshwater quantity, comprehensive water resource management can be considered when the flow rate information flowing through each stream is predicted by integrating current or future expected quantity with weather information and all of them are used as control information of freshwater quantity.

Except for meteorological conditions that determine the flow rate, accurate measurement of stream velocity is of paramount importance in water resource management. In every measurement, measurement or survey, there is an improvement in error by a measuring instrument or by a measurer. Similarly, it can be seen that such measurement error necessarily exists in river flow rate measurement. If the error is increased, it can cause water resource management failure due to inaccuracy when used as water resource management information as described above.

The flow rate measurement is different from the general measurement or measurement, and the measurement error is large due to the fluctuation of the flow rate to be measured.

A common method for measuring the flow velocity of a river is to select a suitable flow meter and place the flow meter in the stream, and measure the flow rate by using the change indicated by the flowmeter in response to the flow rate as measurement information. A rotary flowmeter or an ultrasonic flowmeter is used. do.

Rotary tachographs or ultrasonic tachographs are operated and managed by the meter. In the low-flow flat and low season, the measurer can directly enter the river to operate the flow meter, so if the measurement error of the flow meter is small, there is no problem in measuring the flow rate of the flat and low season.

In flood seasons such as the summer, the flow rate increases, making it impossible to install and operate all of the measuring equipment such as a rotary tachometer or an ultrasonic tachometer. Therefore, the use of the tachometer itself is difficult during the flood season, so the flow rate of the stream is measured in another way. For example, buoys such as effervescent styropol, straw, and rod buoys are placed on the surface of a river in a fluid flowing on a bridge. Will be calculated.

However, it is not easy to provide accurate river flow information quickly by using the method of measuring the envelops depending on the existing manpower. There may be a number of reasons for this, but here are some of the important reasons: First, it was possible to measure the flow rate only at some restricted points where river flow rates could be measured: near some bridges and other structures. Thus, the values at some of these points have been used as representative values for all the rivers. In order to reduce the error caused by this reason, the measurement of the whole river stream is necessary, but since it is not practically possible now, more points or longer sections of measurement are needed and efforts have been made to do so. Second, in the general case, the measurement data are recorded on-site and the flow rate value of the stream is calculated after returning to the office. This manual process is not only dependent on the reliability and accuracy of the data depending on the proficiency of the observer, but also has difficulty in obtaining rapid stream velocity information. Third, at least three manpower were needed for enveloping and measuring envelops, and at the same time, it was impossible to measure multiple points.

Accordingly, the present invention is to provide a flow meter that can measure the flow rate of the river in the state of increased flow rate, such as a flood, while minimizing the measurement error.

Another object of the present invention is to apply the Bluetooth wireless connection method to the sealer to easily measure the flow rate without personnel for the time check, and transmit the measured flow rate value to the server computer by the Internet and CDMA wireless communication module This allows you to check the flow rate reading anywhere you can use your computer and the Internet.

In order to achieve the above object, the present invention floats the rich at any point on the surface of the water, moves the rich by a predetermined distance along the moving direction of the fluid, and measures the time required for the rich moving distance of the river. In the stream flow measurement device for measuring the average flow rate of,

A Bluetooth device installed in the rich and composed of a Bluetooth data transmission module and a power module;

In order to detect the signal of the descending enveloper and store the detected time in memory and transmit it to the server computer using CDMA wireless communication, Bluetooth transceiver module, CDMA wireless communication module, CPU, memory and power module On-site measurement control unit consisting of one or more at each of the start and end points of the measurement section,

In order to calculate the flow rate by receiving the information of the ID and signal detection time of the Bluetooth device collected from the field measurement and control unit, the data is received and simultaneously databased using an Internet socket program, and then the flow rate is calculated based on this. It is characterized by consisting of a central control unit consisting of a server computer.

Hereinafter, an embodiment according to the present invention will be described with reference to the drawings.

1 is a configuration diagram showing the entire river flow rate measuring apparatus according to the present invention, Figure 2 is a schematic explanatory diagram showing a Bluetooth device which is an essential part of the present invention, Figure 3 is a field measurement control unit which is an essential part of the present invention One schematic diagram.

The present invention is a flow rate measuring device that can measure the flow rate of the river in a state in which the flow rate is increased, such as a flood, while minimizing the measurement error.

In addition, by applying the Bluetooth wireless connection method to the encapsulator, it is possible to easily measure the flow rate without personnel for time check, and transmit the measured flow rate value to the server computer by internet and CDMA wireless communication module. It is a flow rate measuring device that can check the flow rate measurement anywhere you can use the Internet.

The present invention, as shown in Figure 1 is installed in the rich (Bluetooth), the Bluetooth device 10 for generating a Bluetooth signal over a short distance, and at least one at each of the flow rate measurement start point and end point is installed from the Bluetooth device 10 On-site measurement control unit 20 for receiving the Bluetooth signal and transmitting it to the server computer 31 of the Bluetooth device, and the central control unit 30 to collect information from the field measurement control unit 20 and calculate the flow rate using the same. It consists of.

The Bluetooth device 10 is composed of a miniature data transmission and reception module and a power supply module of the Bluetooth method, and are installed in the rich.

In more detail, as shown in FIG. 2, the transmission / reception module by the Bluetooth chip 12, the control module 11, and the power supply module 13 are configured. If necessary, the magnetic switch 14 is added. It may be configured as.

On the other hand, the transmitting and receiving module used in this embodiment, ACODE-300 can transmit and receive data with a receiving rate of 99% within 30m of the space where bidirectional real-time 1: 1 communication is opened, and extends the signal detection range by using various antennas You can do it (Table 1).

Table 1. Communication distance by antenna

Antenna configuration (send-receive) Communication distance (m) Default-Default 120 Default-Dipole 150 Dipole-Dipole 200 Patch-Dipole 400 Patch-Patch 1,200

In addition, wireless data communication between PCs and wireless communication between PICBASIC, as well as stable Bluetooth communication standards, interference-free and excellent security was determined to be a suitable module for river flow rate measurement. This Bluetooth chip uses the magnetic switch 14 to complete the power module using the AAA size battery or the mercury battery as shown in FIG. It was.

In summary, the Bluetooth chip 12 plays a role of generating a Bluetooth signal, and the power supply module 13 may use a mercury cell or an AAA battery as a device for supplying power to the Bluetooth device 10.

The control module 11 serves to supply power by using the magnetic switch 14 or to check the operation through the LED, and the magnetic switch 14 is a kind of power on / off for supplying power only during an experiment. off switch acts as a switch.

In this case, the magnetic switch 14 is composed of a pair of left and right pairs, as shown in the figure, the power is supplied when the two magnetic switches 14 are coupled, and when the one of them is removed, the power supply is stopped. It is composed.

Therefore, the magnetic switch 14 is normally kept separated from each other, and the left and right sides of the magnetic switch are combined only when measuring the flow rate, thereby preventing power loss during non-use.

The Bluetooth device configured as described above is coupled to a rich person as shown in FIG. 2 and installed in a sealed container to maintain a waterproof state. 10a is a surface rich and 10b can be used for many purposes as a seal.

On the other hand, at least one field measurement control unit 20 is installed at the start and end points of the measurement section, and detects the signal of the descending sealer and stores the detected time in the memory and then uses the CDMA wireless communication. In order to transmit to the server computer, it consists of a Bluetooth transmission and reception module 24, CDMA wireless communication module 22, controller 21, MEMORY and power module 23.

That is, the field measurement control unit 20 is installed at the start and end of the desired measurement section each one or more, to detect the signal of the descending enveloper and to store the exact time detected in the memory server using CDMA wireless communication Transfer to computer 31. In the transmitted data, the distance between two receivers is divided by the difference in time detected to obtain the average flow velocity between the two points.

In the case of the field measurement control unit 20 is installed at a minimum distance of at least two. Then, the dropped rich man's unique Bluetooth signal is detected, the correct time of detecting the signal is stored in a memory, and the stored data are collected in a field measurement control unit 20, using a CDMA wireless communication server computer (31). Will be sent to. The transmitted data is obtained by dividing a predetermined distance between the two field measurement control units 20 by the difference in the detected time to obtain the flow velocity between the two points.

  Here, the field measurement control unit 20 detects a unique Bluetooth ID (Bluetooth chip can input a unique ID) that each Bluetooth rich has, so that even if a large number of rich people descend at once, The ID and the detected time are checked and stored in the memory.

Looking at the main configuration as shown in Figure 3 is largely composed of a Bluetooth transceiver module 24, a CDMA wireless communication module 22, a controller 21 consisting of a CPU memory, and a power module 23.

  The Bluetooth transceiver module 24 detects the dropped rich Bluetooth signal, and the controller 21 stores the rich information and the detected time. The CDMA wireless communication module 22 transmits the stored data to the server computer 31 at the remote location, and the power module 23 supplies power for the operation of the field measurement control unit 20.

Meanwhile, as shown in FIG. 1, the central control unit 30 receives data using the CDMA wireless communication module 32 and the Internet socket program, and simultaneously calculates a flow rate based on the database. Server computer 31.

The field measurement control unit 20 transmits the collected time data of the ID and the signal of each Bluetooth device 10 to the server computer 31.

The server computer 31 first receives data using an Internet socket program and simultaneously converts the data into a database, and then calculates a flow rate based on the database. Thus, as shown in FIG. 5, the measurement time, the ID of the Bluetooth device 10, the time detected by each field measurement control unit 20, and the calculated speed are provided in a table and a graph through the Internet web page.

That is, the central control unit 30 has a configuration in which the CDMA wireless communication module 32 and the modem 33 by the PCS phone are mounted on the server computer 31 and the system control software is provided. The control unit 20 communicates with each other.

The central control unit 30 enables real-time monitoring of on-site conditions, and the measured data are stored in the server computer 31 as a database, so that the server computer 31 can be used anywhere where a computer and the Internet can be used. You can learn about the flow rate of the river through the Internet homepage provided by.

For reference, briefly the Bluetooth specification of the computer and telecommunications industry that describes how mobile phones, computers, PDAs, etc. can be easily connected to each other at home or at work using a short-range wireless connection. Bluetooth was launched by the Bluetooth Special Interest Group (SIG) formed by Nokia, IBM, Toshiba, and Intel on May 21, 1998, based on Ericsson in Sweden. It is based on the research of air interfaces between mobile phones and peripherals. Currently, the Bluetooth SIG is participated by more than 1,600 companies around the world. In December last year, Microsoft, 3Com, Lucent Technologies, and Motorola joined the global standard. Bluetooth, in particular, is oriented towards the Open standard and attracts a lot of attention around the world because there is no need to pay a license.

Therefore, the flow rate measuring method according to the present invention can be performed as follows.

Figure 4 is a state diagram of the use of the river flow rate measuring apparatus according to the present invention, the method by the sealer dropping the sealer using a bridge or dedicated rich dropping facility and maintain the draft for more than 30m the first interval to maintain a stable balance The flow rate of the stream is obtained by measuring the time passing over the section of about 50m after passing through.

At this time, the Bluetooth device 10 is coupled to the rich as shown in FIG. 2 and dropped into the river, the field measurement control unit 20 is installed at each one or more at the start and end of the measurement section, the central control unit 30 Can be installed anywhere the Internet is available.

When the data transmission / reception module according to the ACODE-300 model is used, the Bluetooth device 10 can transmit and receive data at a reception rate of 99% within 30m of a space in which two-way real-time 1: 1 communication is opened. Signal detection range can be extended.

When the rich couple Bluetooth device 10 is floating in the river as shown in FIG. 4, when the measurement start point indicated by the first measurement section is reached, the field measurement control unit 20 detects the signal of the descending rod After the accurate time is stored in the memory is transmitted to the server computer 31 of the central control unit 30 through the CDMA wireless communication module 22.

The transmitted data (ID of the Bluetooth device, signal detection time) is transmitted to the server computer 31 through the CDMA wireless communication module 32, and the server computer 31 first uses an Internet socket program. After receiving the data and simultaneously database, the flow rate is calculated based on this database. Thus, the results are provided in a table and graph through the Internet web page as shown in FIG. 5 to measure the time, ID of the Bluetooth device 10, time detected by each field measurement controller 20 and the calculated speed.

In addition, since the server computer 31 is configured to be connected to the Internet, wherever the user can use the computer and the Internet, the river flow rate can be checked in real time.

As such, the present invention has the effect of improving the quality of information as water resource management information by precisely measuring the flow velocity of the river with increased flow rate, such as a flood, and eliminating the difference in the measured value that varies according to the measurer. have.

In addition, by applying the Bluetooth wireless connection method to the encapsulator, it is possible to easily measure the flow rate without personnel for time check, and transmit the measured flow rate value to the server computer by internet and CDMA wireless communication module. Wherever there is internet access, it is possible to instantly check the flow rate reading.

On the other hand, the present invention by applying the ubiquitous related technologies (Bluetooth, CDMA, Web & Mobile, etc.) by applying the technology of the ubiquitous computing field of domestic and foreign technology direction to be developed continuously in the future economic This is a future-oriented system that is expected to develop technological synergy and improve the accuracy and reliability of river sulfur data in the future. Although used as a representative value, the present invention enables the acquisition of sulfur data in all river sections by applying a wireless technology for constructing a flexible ubiquitous sensor network (USN) over the whole river section. This opens up the possibility of producing and providing accurate stream sulfur data. In addition, the observed data is automatically transmitted to the server using CDMA wireless Internet communication, which eliminates errors caused by manual entry. The receiver always records GPS time. There is an advantage to reduce the error than the observer's method of recording.

In addition, stream velocity data stored on the server can be obtained easily and economically using economical short-range wireless (CDMA) and wide area network (CDMA) communications from the sensor to the server. In order to facilitate the user's access to the server, it is possible to provide data using the Internet along with the server data transmission. In addition, when the encapsulant is administered to obtain existing river flow data, the demand for manpower can be reduced from at least three to at least one person, which is economically effective, and the flow rate is measured through Bluetooth signal detection so that the night time Can also be measured easily.

Claims (5)

A river flow measurement device that floats a rich man at any point on the surface of the water, moves the rich man by a predetermined distance along the direction of fluid movement, and measures the average flow velocity of the river by measuring the time required for the rich man's moving distance. To A Bluetooth device installed in the rich and composed of a Bluetooth data transmission module and a power module; In order to detect the signal of the descending sealer and store the detected time in the memory and transmit it to the server computer using CDMA wireless communication, the Bluetooth transmission / reception module, CDMA wireless communication module, CPU, memory and power module On-site measurement control unit consisting of one or more at each of the start and end points of the measurement section, In order to calculate the flow rate by receiving the information of the ID and signal detection time of the Bluetooth device collected from the field measurement and control unit, the data is received and simultaneously databased using an Internet socket program, and then the flow rate is calculated based on this. River flow rate measurement device using Bluetooth and CDMA wireless communication, characterized in that consisting of a central control unit consisting of a server computer. The Bluetooth device of claim 1, wherein the Bluetooth device includes a transmission / reception module by a Bluetooth chip, a control module, and a power module, and a magnetic switch for performing a kind of power on / off switch to supply power only during an experiment. River flow rate measurement device using Bluetooth and CDMA wireless communication characterized in that the additional configuration. The apparatus of claim 1, wherein the Bluetooth device is coupled to a rich person and installed in a sealed container to maintain a waterproof state. The method of claim 1, wherein the field measurement controller checks the unique Bluetooth ID (Bluetooth chip can enter the unique ID of the Bluetooth chip) each of the Bluetooth rich with the detected time and stores in the memory River flow rate measurement device using Bluetooth and CDMA wireless communication. The wireless communication system of claim 1, wherein the server computer provides a table and a graph of a measurement time, an ID of a Bluetooth device, a time detected by each field measurement control unit, and a calculated speed through an internet web page. River flow rate measuring device using.

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