KR20120068532A - Water quality measurement apparatus, sensing apparatus for water quality measurement - Google Patents

Abstract

PURPOSE: An apparatus for measuring water quality and an apparatus for sensing are provided to continuously manage water quality information. CONSTITUTION: An apparatus for measuring water quality comprises a fixed frame, a magnetic body(102), a first communication device(104), a second communication device(106), a sensing device(200a,200b), a sensor(300a,300b), a sensor support(302a,302b), and a sensor protection case(400a,400b). The sensing frame is fixed on an underwater moving body and comprises a sensing device. The magnetic body comprises a permanent magnet or electromagnet.

Description

WATER QUALITY MEASUREMENT APPARATUS, SENSING APPARATUS FOR WATER QUALITY MEASUREMENT}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water quality measurement technology, and more particularly, to a water quality measuring device and a sensing device for measuring water quality, which are suitable for providing a constant water quality monitoring and water quality monitoring environment mounted on an underwater vehicle.

Existing river information monitoring system measures the river information of several items by hand only at a few parts of the whole area or by semi-automated method by water quality measuring device.

For example, there are currently five common items (e.g., water temperature, conductivity, pH, dissolved oxygen, total organic carbon, etc.) and eleven optional items (e.g., biomonitoring, volatile organics) Some items of compounds, total nitrogen, total phosphorus, turbidity, etc. are being measured, and collected at 1,500 water quality stations in rivers, lakes, cities, and industrial areas nationwide.

In addition, in the US, the REON (River & Estuary Observatory Network) project has been jointly undertaken by Beacon Research Center and IBM since 2008 for the USN Underwater Environment Monitoring Pilot Service on the Hudson River, New York. The company is developing a rechargeable mobile sensor node and a composite sensor for measuring river information (water temperature / electric conductivity / pH / dissolved oxygen / turbidity).

However, the sensors used for such a measurement has a disadvantage that the maintenance is not easy because the price is very high.

Accordingly, an embodiment of the present invention is to propose a water quality measuring apparatus capable of providing a constant water quality monitoring function by recognizing a moving object that can be freely swim in the underwater state for the entire region, not a part of the river.

In addition, in the embodiment of the present invention, when you want to monitor the water quality using a movable body capable of autonomous swimming in the water, it is to propose a detachable sensing device.

The water quality measuring apparatus for solving the problem of the present invention is a water quality measuring apparatus for accommodating a plurality of water quality information in a limited size underwater moving object, the sensor for sensing the plurality of water quality information, the sensor is inserted, A sensing device that calculates water quality information sensed by a sensor and outputs calculation information, a fixing frame fixedly mounted to the underwater moving object, and including the sensing device, and mounted on an inner surface of the fixing frame and included in the fixing frame A first communication device for receiving the operation information of the device, and a second communication device mounted on an outer surface of the fixing frame and transmitting the operation information received through the first communication device to the underwater mobile unit. .

Here, the water quality measuring device further includes a magnetic body mounted on an inner surface of the fixing frame to closely contact the sensing device and the fixing frame by magnetic force.

In addition, the sensing device may be detachable to the fixing frame according to the magnetism of the magnetic body.

In addition, the magnetic material may include a permanent magnet or an electromagnet.

The sensing device may further include a sensor support part supporting the sensor and a sensor protection case coupled to the sensor support part and protecting the sensor underwater.

In addition, the sensor may include one or more of a potential liquid sensor, an conductivity sensor, or an optical sensor.

In addition, the electrolytic solution sensor may include one of a hydrogen ion concentration sensor or a dissolved oxygen amount sensor, and the optical sensor may include one of a turbidity sensor and a suspended matter sensor.

In addition, the sensing device may include at least two mutually independent structures.

The first communication device may include a short range wireless communication device.

In addition, the second communication device may include a serial communication device.

The water quality measuring apparatus may have a structure in which the fixing frame is inserted into the rear surface of the underwater moving object.

The sensing device for measuring the water quality according to an embodiment of the present invention, the sensor interface unit for interfacing the sensing information measured by the water quality measurement sensor inserted therein, and calculates the sensing information provided through the sensor interface unit, And a control unit for generating calculation data for the sensing information to be calculated, and a communication unit for transmitting the calculation data generated by the control unit to the underwater mobile body.

Here, the sensing device may be inserted into the rear surface of the underwater mobile body.

In addition, the sensing device may be inserted into a fixing frame fixedly mounted to the rear surface of the underwater mobile body.

In addition, the sensing device may be in close contact with the fixing frame by a magnetic body.

The water quality sensor may include at least one of a hydrogen ion concentration sensor, an electrical conductivity sensor, a dissolved oxygen amount sensor, a turbidity sensor, or a suspended matter sensor.

In addition, the sensing device may further include a power supply unit for supplying power for driving the sensing device.

The controller may generate state information of the sensor for measuring the water quality through the sensor interface.

The communication unit may include a short range wireless communication device.

The short range wireless communication device may include an infrared communication device.

According to the present invention, compared to the existing river information monitoring system which measures the river information of various items by only a few parts of a large area by manual or semi-automated method, the moving object for autonomous swimming in the water at all times and monitoring the water quality For example, it can be used as a core sensor device for water quality monitoring in underwater robot systems such as fish robots. Accordingly, by continuously managing the water quality information of the stream, it is expected that the precautions can be taken before the environmental change of the river is widespread.

1 is a block diagram illustrating a water quality measuring apparatus according to an embodiment of the present invention;
FIG. 2 is a diagram exemplarily illustrating a case in which a water quality measuring apparatus according to an embodiment of the present invention is mounted on an underwater moving object;
3 is a view illustrating a configuration of a sensing device for measuring water quality according to an embodiment of the present invention;
4 is a block diagram illustrating a sensing device for measuring water quality according to an embodiment of the present invention.

Advantages and features of the present invention, and methods for achieving them will be apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the invention to those skilled in the art. Is provided to fully convey the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout.

In describing the embodiments of the present disclosure, when it is determined that a detailed description of a known function or configuration may unnecessarily obscure the subject matter of the present disclosure, the detailed description thereof will be omitted, and the following terms are used in the embodiments of the present disclosure. Terms are defined in consideration of the function of the may vary depending on the user or operator's intention or custom. Therefore, the definition should be based on the contents throughout this specification.

Combinations of each block of the block diagrams and respective steps of the flowcharts may be performed by computer program instructions (executable engines), which may be executed on a processor of a general purpose computer, special purpose computer, or other programmable data processing equipment. As such, instructions executed through a processor of a computer or other programmable data processing equipment create means for performing the functions described in each block of the block diagram or in each step of the flowchart. These computer program instructions may be stored in a computer usable or computer readable memory that can be directed to a computer or other programmable data processing equipment to implement functionality in a particular manner, and thus the computer usable or computer readable memory. The instructions stored therein may also produce an article of manufacture containing instruction means for performing the functions described in each block of the block diagram or in each step of the flowchart.

In addition, computer program instructions may be mounted on a computer or other programmable data processing equipment, such that a series of operating steps may be performed on the computer or other programmable data processing equipment to create a computer-implemented process to generate a computer or other program. Instructions for performing possible data processing equipment may also provide steps for performing the functions described in each block of the block diagram and in each step of the flowchart.

In addition, each block or step may represent a portion of a module, segment or code that includes one or more executable instructions for executing a specified logical function (s), and in some alternative embodiments blocks or steps Note that it is also possible for the functions mentioned to occur out of order. For example, the two blocks or steps shown in succession may, in fact, be performed substantially concurrently, or the blocks or steps may be performed in the reverse order of the corresponding function, as required.

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

1 is a block diagram of a water quality measurement apparatus according to an embodiment of the present invention, the fixing frame 100, the magnetic body 102, the first communication device 104, the second communication device 106, the sensing device 200a 200b, sensors 300a and 300b, sensor supports 302a and 302b, and sensor protective cases 400a and 400b.

As shown in FIG. 1, the fixing frame 100 may be fixedly mounted to an underwater moving body which will be described later, and may include the sensing device devices 200a and 200b which will be described later.

The magnetic body 102 may be mounted on the inner surface of the fixing frame 100 to serve to closely contact the sensing devices 200a and 200b and the fixing frame 100 by magnetic force. Such magnetic body 102 may include, for example, a permanent magnet or an electromagnet. Therefore, the sensing devices 200a and 200b may be detachably attached to the fixing frame 100 according to the magnetism of the magnetic body 102. In order to operate the water quality measurement device in water at all times, easy maintenance is a priority. In the embodiment of the present invention, in consideration of such a requirement, the sensing devices 200a and 200b may be organically coupled to the fixing frame 100 using magnetic force.

The first communication device 104 may be mounted on an inner surface of the fixing frame 100 to receive calculation data of the sensing devices 200a and 200b included in the fixing frame 100. The first communication device 104 may include, for example, a communication device such as a short range wireless communication device, and more particularly, an infrared communication device. In the embodiment of the present invention, such a short range wireless communication device may be applied. The reason is to enhance operability in the water and, in particular, to avoid distortion of water quality sensing data by overcoming disturbances such as wireline electrical noise.

The second communication device 106 may be mounted on an outer surface of the fixing frame 100 to transmit arithmetic data received through the first communication device 104 to the underwater mobile object. The second communication device 106 may include, for example, a polling serial communication device, for example, a RS-232C communication device.

The sensing devices 200a and 200b according to the embodiment of the present invention include at least two mutually independent structures, and the sensor 300a is inserted into each sensing device, for example, the sensing device 200a. The water quality information sensed by the sensor 300a may be calculated to output calculation data. In addition, the sensing devices 200a and 200b may detect types of sensors inside and execute an operation corresponding to each sensor, and overall status information of the internal sensors, for example, water temperature, battery level, and presence or absence of a sensor And the like. The operation data and / or state information output in this way may be provided to the fixing frame 100 through the first communication device 104.

The sensors 300a and 300b may be inserted into the respective sensing devices 200a and 200b to sense a plurality of pieces of water quality information in the water. Such sensors 300a and 300b may be, for example, hydrogen ion concentration (pH) sensors or electric conductivity (EC) sensors or dissolved oxygen (DO) sensors or turbidity sensors or suspended solids. It may include one or more of the sensors. Here, the hydrogen ion concentration sensor or the dissolved oxygen amount sensor may be a potential liquid sensor, and the turbidity sensor or suspended matter sensor may be classified as an optical sensor.

The sensor supports 302a and 302b are means for supporting the respective sensors 300a and 300b. For example, in the case of the hydrogen ion concentration sensor, the sensor supports 302a may be contained in a glass tube. ) 302b may serve to support the hydrogen ion concentration sensor.

The sensor protective cases 400a and 400b are coupled to the respective sensor support units 302a and 302b and may serve to protect the respective sensors 300a and 300b in the water. For example, since the hydrogen ion concentration sensor is in the form of a glass tube, the glass tube may be broken due to water pressure or an obstacle in the water. To protect against

The water quality measuring apparatus including the fixing frame 100, the sensing devices 200a and 200b, the sensors 300a and 300b, the sensor support parts 302a and 302b, and the sensor protective cases 400a and 400b are provided. It can be applied as illustrated in FIG.

As illustrated in FIG. 2, an embodiment of the present invention is for accommodating a plurality of water quality information in a limited size, for example, the underwater mobile body 10 having a length of less than 40 to 50 cm. Another water quality measuring device may be mounted in the form of being inserted into the rear surface of the underwater mobile body (10). The underwater mobile body 10 is, for example, a fish-shaped robot, and may include a mobile body capable of autonomous swimming in the water.

The reason why the water quality measuring device is mounted on the rear surface of the underwater mobile body 10 is that the potential liquid is contained in the case of the hydrogen ion concentration sensor or the dissolved oxygen sensor, and the potential liquid must always be located at the bottom of the sensor for normal operation. This is based on the fact that water quality can be measured. In addition, optical sensors such as turbidity sensors and suspended solids sensors take into consideration that measurement errors may occur due to the influence of natural light (sunlight) when the lens faces upside or faces the surface.

In FIG. 2, for example, two mutually independent sensing devices 200a and 200b may be applied to the sensing device so that the sensing device may be mounted on the limited-size underwater moving object 10. Therefore, when the underwater mobile body 10 is moved underwater, two water quality information can be collected at once by two mutually independent sensing devices. However, this application is only an example for explaining the embodiment of the present invention, and may be implemented in another number according to the system environment, size, etc., which will become more apparent from the claims to be described later.

The two sensing devices 200a and 200b may be inserted into the rear surface of the underwater mobile body 10 through a fixing frame 100 fixedly mounted to the underwater mobile body 10, and one sensing device as shown in FIG. 3, for example. For example, the reference numeral 200a is equipped with one sensor 300a, so that the underwater moving object 10 can measure the water quality while moving.

FIG. 4 is a block diagram illustrating an internal operation and function of one sensing device, for example, reference numeral 200a. The sensor interface unit 202, the control unit 204, the communication unit 206, and the power supply unit 208 are illustrated in FIG. And the like.

The sensor interface unit 202 may serve to interface sensing information measured by a sensor inserted into the sensing device 200a, for example, a hydrogen ion concentration sensor.

The controller 204 may operate to calculate sensing information, that is, analog information, provided through the sensor interface unit 202 as digital information, and generate calculation data for the calculated sensing information. In addition, the control unit 204 detects the type of the internal sensor, and can execute the operation for each sensor, generating the overall status information of the internal sensor, for example, the water temperature, the battery level, the presence or absence of the sensor failure, etc. Can play a role.

The communication unit 206 may serve to transfer the calculation data and / or state information generated by the control unit 204 to the underwater mobile unit 10.

The power supply unit 208 may serve to supply power for driving the sensing device 200a. For example, the power supply unit 208 may include a battery or the like.

On the other hand, the communication method between the water quality measuring device and the underwater mobile unit 10 according to the embodiment of the present invention, for example, has been mentioned as a serial communication method (for example, RS-232C), such RS-232C communication method If a detailed specification is defined as follows.

1) First, communication standard is as following [Table 1].

division Detail etc Communication method RS-232C asynchronous Transmission specification 9600 bps, 8bit, Parity None, Stop bit 1 Method of operation Polling method (robot fish-host, measuring device-slave) Data transmission method Half Duplex, Block Transmission Sign code ASCII

2) Communication command codes are as shown in [Table 2].

Command code
(Host => meter) Detail Measurement device response
(Measuring device => host) 0x02DATA0x03XX Real time measurement data transmission request Data transfer (FORMAT-1) 0x02CCHK0x03XX Calibration value search (calibration data request) Data transfer (FORMAT-2)

3) Communication command contents

The communication command code refers to a command such as a real-time measurement data request and a calibration value data request sent from the underwater mobile unit, which is a host device, to the water quality measurement device. For example, the communication command code may be illustrated as follows.

0x02DATA0x03XX <CR>: Real time measurement data transmission request

0x02: Start of sentence

DATA: Real-time measurement data transmission request

0x03: end of sentence

XX: Error test code

0x0d: carriage return

In the communication command code of [Table 2], FORMAT-1, which is a data transmission method, can be expressed as shown in [Table 3] below.

No. BYTE Material Contents Other One One The beginning of a sentence 0x02 2 4 Host command DATA 3 5 Code of the metric PHY00 4 10 Metric of metric XXXXXX.XXX 5 10 Measured value of temperature item XXXXXXX.XX 6 2 Meter status output 00 7 50 Additional information 8 One The end of a sentence 0x03 9 2 Error test code 10 One Carriage return (CR) 0x0d

In addition, the status output code may be expressed as shown in the following [Table 4].

code Description Measurement error 00 Normal operation Normal operation 06 Malfunction Bad sensor, bad parameter setting, bad temperature sensor 03 In calibration Code generation immediately after entering calibration menu 04 Repair and check When modifying parameters and other matters

0x02CCHK0x03XX <CR>: Request calibration data transmission of measuring equipment

0x02: Start of sentence

CCHK: Request to transmit calibration value data of measuring instrument

0x03: end of sentence

XX: Error test code

0x0d: carriage return

In the communication command code of [Table 2], FORMAT-2, a calibration data transmission method, can be expressed as shown in [Table 5] below.

No. BYTE Material Contents Other One One The beginning of a sentence 0x02 2 4 Host command CCHK 3 10 inclination XXXXXX.XXX 4 10 Intercept XXXXXX.XXX 5 10 Zero Calibration Concentration XXXXXX.XXX 6 10 Span Calibration Concentration XXXXXX.XXX 7 10 FACTOR XXXXXX.XXX 8 10 OFFSET XXXXXX.XXX 9 10 Measuring range XXXXXX.XXX 10 10 inclination XXXXXX.XXX 11 10 Intercept XXXXXX.XXX 12 One The end of a sentence 0x03 13 2 Error test code 14 One Carriage return (CR) 0x0d

The error verification code generation method is as follows.

C code

            unsigned char MakecheckSum (char * data, int len) {

                int I; unsigned char a; a = 0;

                for (i = 0; <len; i ++) a = char (a + * (data + i))

                    return a; }

           / * Split into 2 bytes to send checksum * /

           chk1 = (Checksum & 0xF0) >> 4 | 0x03;

           chk2 = (Checksum & 0x0F) >> 0 | 0x03;

According to the embodiment of the present invention as described above, it can be used as a core sensor device for monitoring the water quality in a mobile robot, such as a fish robot, such as a fish robot for autonomous swimming in the underwater state at all times Therefore, it is possible to provide an environment for continuously managing the water quality information of rivers.

100: fixed frame
102: magnetic material
104: first communication device
106: second communication device
200a, 200b: sensing device
300a, 300b: sensor
302a, 302b: sensor support
400a, 400b: sensor protective case

Claims (20)

A water quality measuring device for accommodating a plurality of water quality information in a limited size underwater underwater vehicle,
A sensor for sensing the plurality of water quality information;
A sensing device into which the sensor is inserted, which calculates water quality information sensed by the sensor and outputs calculation information;
A fixing frame fixedly mounted to the underwater mobile body and including the sensing device;
A first communication device mounted on an inner surface of the fixing frame to receive the operation information of the sensing device included in the fixing frame;
And a second communication device mounted on an outer surface of the fixing frame to transmit the operation information received through the first communication device to the underwater mobile unit.
Water quality measuring device.
The method of claim 1,
The water quality measuring device,
And a magnetic material mounted on an inner surface of the fixing frame to closely contact the sensing device and the fixing frame by a magnetic force.
Water quality measuring device. The method of claim 2,
The sensing device is detachable to the fixing frame according to the magnetism of the magnetic body
Water quality measuring device.
The method of claim 2,
The magnetic material includes a permanent magnet or an electromagnet
Water quality measuring device.
The method of claim 1,
The water quality measuring device,
A sensor support for supporting the sensor;
It is coupled to the sensor support, and further comprises a sensor protective case for protecting the sensor in the water
Water quality measuring device.
The method of claim 1,
The sensor includes one or more of a potential liquid sensor, an conductivity sensor, or an optical sensor.
Water quality measuring device.
The method according to claim 6,
The electrolytic solution sensor includes one of a hydrogen ion concentration sensor or a dissolved oxygen amount sensor, and the optical sensor includes one of a turbidity sensor and a suspended matter sensor.
Water quality measuring device.
The method of claim 1,
The sensing device includes at least two mutually independent structures
Water quality measuring device.
The method of claim 1,
The first communication device includes a near field communication device.
Water quality measuring device.
The method of claim 1,
The second communication device includes a serial communication device.
Water quality measuring device.
11. The method according to any one of claims 1 to 10,
The water quality measuring device has a structure in which the fixing frame is inserted into the rear surface of the underwater moving object.
Water quality measuring device.
A sensor interface unit for interfacing sensing information measured by a water quality sensor inserted therein;
A control unit for calculating sensing information provided through the sensor interface unit and generating calculation data for the calculated sensing information;
It includes a communication unit for transmitting the calculation data generated by the control unit to the underwater moving object
Sensing device for measuring water quality.
The method of claim 12,
The sensing device is inserted into the back of the underwater mobile body
Sensing device for measuring water quality.
The method of claim 13,
The sensing device is inserted into a fixed frame fixedly mounted on the back of the underwater mobile body
Sensing device for measuring water quality.
15. The method of claim 14,
The sensing device is in close contact with the fixing frame by a magnetic material
Sensing device for measuring water quality.
The method of claim 12,
The water quality measurement sensor includes at least one of a hydrogen ion concentration sensor, an electrical conductivity sensor, a dissolved oxygen amount sensor, a turbidity sensor, or a suspended matter sensor.
Sensing device for measuring water quality.
The method of claim 12,
The sensing device further includes a power supply unit supplying power for driving the sensing device.
Sensing device for measuring water quality.
According to claim 12,
The controller generates state information of the sensor for measuring the water quality through the sensor interface unit.
Sensing device for measuring water quality.
The method of claim 12,
The communication unit includes a near field communication device.
Sensing device for measuring water quality.
The method of claim 19,
The near field communication device includes an infrared communication device.
Sensing device for measuring water quality.

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