JP6208036B2 - Bio water quality monitoring device, water quality monitoring system, and water quality monitoring method - Google Patents

Description

  The present invention relates to a bio-water quality monitoring apparatus suitable for configuring a water quality monitoring system for continuously monitoring the safety of water quality, a water quality monitoring system using a plurality of the bio-water quality monitoring apparatuses, and a water quality monitoring method.

  Bio-water quality monitoring devices that monitor toxin substances in water using microorganisms that are sensitive to harmful substances generally calibrate for a predetermined time every fixed period of about 24 hours in order to maintain monitoring accuracy. However, since the monitoring is interrupted during calibration, a period during which the monitoring cannot be performed occurs.

  Patent Document 1 proposes a technique for performing zero-point calibration and full-scale (span) calibration stably and in a short time in a biosensor that detects harmful substances in environmental water.

JP 2006-71438 A

  The bio-water quality monitoring device uses a biosensor in which microorganisms that are extremely sensitive to harmful substances are immobilized while alive in order to monitor harmful substances in water. In order to maintain monitoring accuracy using a bio-water quality monitoring device, a buffer solution containing trace nutrients necessary for growth is maintained while maintaining optimal conditions such as optimal temperature and optimal pH for growth. It is necessary to measure the amount of oxygen consumed by the microorganisms. Therefore, even with the calibration method proposed in Patent Document 1, a calibration time of about 1 to 2 hours is required. Monitoring must be interrupted during this calibration period. As a method of continuously monitoring the water quality safety by avoiding this monitoring interruption, two bio water quality monitoring devices are prepared, and calibration of the two bio water quality monitoring devices is performed so that the two monitoring interruptions do not overlap. A method of setting the time offset can be considered.

  However, the monitoring interruption in the bio-water quality monitoring device is not limited to calibration, but also occurs due to maintenance / inspection, water tank cleaning, failure, and the like. Moreover, the monitoring interruption time in the bio-water quality monitoring device varies depending on the cause of the monitoring interruption. Depending on the cause of the monitoring interruption, it may be assumed that it takes about half a day to a maximum of one day for the bio-water quality monitoring apparatus to recover to the monitoring state. When such a monitoring interruption exceeding the normal calibration time occurs, it cannot be dealt with by a method in which the calibration times of the two bio-water quality monitoring devices are set in advance.

  In the present invention, a plurality of bio-water quality monitoring devices communicate and cooperate with each other in monitoring interruption and monitoring recovery, so that at least one bio-water quality monitoring device maintains a monitoring state in 24 hours a day. It is an object of the present invention to provide a bio-water quality monitoring device, a water quality monitoring system, and a water quality monitoring method capable of continuously monitoring the safety of water quality even when a monitoring interruption exceeding a normal calibration time occurs. To do.

The bio-water quality monitoring device according to the first aspect of the present invention is a bio-water quality monitoring device in a water quality monitoring system in which a plurality of bio-water quality monitoring devices are connected to each other so as to be able to transmit and receive each other and continuously monitor the safety of water quality. Each bio-water quality monitoring device sets a water quality monitoring means for monitoring harmful substances in water using microorganisms sensitive to harmful substances, and a calibration start time for starting calibration at a predetermined period in the water quality monitoring means. a calibration time setting means, said water quality monitoring means transmits the monitoring interrupt signal when moving to the monitoring interruption state from the monitoring state, the monitor recovery signal when the water quality monitoring means is shifted from the monitoring suspended state to the monitoring state and transmitting means for transmitting and receiving means for outputting to the water quality monitoring means receives the monitoring interrupt signal and monitor recovery signal from another bio water quality monitoring device, wherein the water superintendent Means, when it becomes pre SL calibration start time before the monitoring interrupt signal is input from the receiving unit, and shifts from the monitoring state to monitor suspended, performs calibration processing of the predetermined time, the calibration process ends after transition from monitoring the suspended state to the monitoring state, if the monitoring interrupt signal from the previous SL receiving means before the said calibration start time is input, even if the calibration start time, monitoring the recovery signal from said receiving means It is characterized in that the monitoring state is continuously maintained until is input.

The water quality monitoring system according to the second aspect of the present invention is a water quality monitoring system for continuously monitoring the safety of water quality by connecting a plurality of bio water quality monitoring devices so as to be able to transmit and receive each other. When any of the monitoring devices shifts from the monitoring state to the monitoring suspended state , the monitoring device transmits a monitoring suspension signal to the other bio water quality monitoring device, and the bio water quality monitoring device that has transmitted the monitoring suspension signal from the monitoring suspended state when going to the monitoring state, transmits a monitor recovery signal to other bio water quality monitoring device, at least one bio water quality monitoring apparatus in said other bio water quality monitoring device, receiving the monitoring interrupt signal after, characterized in that maintains the monitoring state until it receives the monitor recovery signal.

The water quality monitoring method according to the third aspect of the present invention uses a plurality of bio-water quality monitoring devices that require monitoring interruption for a predetermined time at a constant period in order to guarantee the function of monitoring harmful substances, thereby ensuring water quality safety. The water quality monitoring method for continuously monitoring the water quality monitoring device , and when any one of the plurality of water quality monitoring devices is suspended, the bio water quality monitoring device that has been suspended is configured as the plurality of water quality monitoring devices. a first process of transmitting the monitoring interrupt signal to the other bio water quality monitoring device of the monitoring device, wherein the monitoring interrupt signal is received, at least one bio of the plurality of bio-water quality monitoring device The water quality monitoring device is configured to maintain the monitoring state even when monitoring is interrupted, and the bio water quality monitoring device that has been suspended is configured to monitor the plurality of water quality monitoring when the monitoring suspension is released. of the devices When the third process of transmitting a monitoring recovery signal to another bio-water quality monitoring apparatus and the monitoring recovery signal is received, at least one bio-water quality monitoring apparatus in the other bio-water quality monitoring apparatus is And a fourth process for shifting to the monitoring interruption.

According to the present invention, the bio-water quality monitoring device comprises water quality monitoring means for monitoring harmful substances in water using microorganisms sensitive to harmful substances, calibration time setting means, transmission means, and reception means. ing. When the monitoring interruption signal is input from the receiving means before the calibration start time set by the calibration time setting means, the water quality monitoring means receives the monitoring recovery signal from the receiving means even when the calibration start time is reached. The monitoring state is maintained until. Continuing Thus, even if the monitoring interruption occurs exceeding the normal calibration time other bio water quality monitoring device, other bio water quality monitoring device during the monitoring suspended, other bio water quality monitoring apparatus for monitoring state As a result, it is possible to continuously monitor the water quality safety.

It is a block diagram which shows the outline of the bio-water quality monitoring apparatus 10 of Embodiment 1 of this invention. It is a functional block diagram which shows the outline of the function of the water quality monitoring means 11 in FIG. It is a figure for demonstrating the measurement principle of the water quality monitoring means 11 of FIG. It is a flowchart which shows the transfer process of the monitoring state in the bio-water quality monitoring apparatus in FIG. It is a system block diagram which shows the outline of the water quality monitoring system of Embodiment 2 of this invention. It is a timing chart which shows transition of the monitoring state in the water quality monitoring system of FIG. It is a system block diagram which shows the outline of the water quality monitoring system of Embodiment 3 of this invention. It is a timing chart which shows transition of the monitoring state in the water quality monitoring system of FIG.

  Hereinafter, embodiments will be described in detail with reference to the drawings.

Embodiment 1

(Configuration of Embodiment 1)
FIG. 1 is a block diagram showing an outline of a bio-water quality monitoring apparatus 10 according to the first embodiment of the present invention.

  The bio-water quality monitoring apparatus 10 includes a water quality monitoring unit 11, a calibration time setting unit 12, and a communication unit 13. The communication unit 13 includes a transmission unit 13a and a reception unit 13b.

The water quality monitoring means 11 monitors the harmful substances in the water using microorganisms sensitive to the harmful substances, and will be described in detail later.
The calibration time setting unit 12 sets a calibration start time for maintaining the hazardous substance detection capability of the water quality monitoring unit 11. The calibration is performed, for example, at a constant period Tc of 24 hours, and requires a predetermined time of 1-2 hours, for example.

Transmitting means 13a transmits a monitoring interrupt signal when the water quality monitoring means 11 is shifted to the monitoring interruption state from the monitoring state, transmits a monitor recovery signal when the water quality monitoring means 11 has been shifted from the monitoring suspended state to the monitoring state Is.

The receiving unit 13 b receives a monitoring interruption signal and a monitoring recovery signal from the outside (other bio-water quality monitoring device) , and outputs the received monitoring interruption signal and monitoring recovery signal to the water quality monitoring unit 11.
The water quality monitoring unit 11 interrupts monitoring when the calibration start time set by the calibration time setting unit 12 is reached, performs calibration, and resumes monitoring when calibration for a predetermined time is completed. If a monitoring interruption signal is input from the receiving unit 13b before the set calibration start time, the water quality monitoring unit 11 thereafter passes the calibration start time until a monitoring recovery signal is input from the receiving unit 13b. Even if the monitoring is not interrupted, the monitoring state is maintained. Furthermore, when the monitoring recovery signal is input from the receiving unit 13b, the water quality monitoring unit 11 that has continued to maintain the monitoring state after the calibration start time shifts to the monitoring suspended state, performs calibration, and performs a predetermined time. When calibration is complete, monitoring is resumed.

FIG. 2 is a functional block diagram showing an outline of the function of the water quality monitoring means 11 in FIG.
The water quality monitoring means 11 includes a detection unit 21, a control unit 22, a display unit 23, pumps 25 and 26, a filter 27, a switching unit 28, a pipe 29, a pure water container 30, a washing water container 31, a feed liquid container 32, and a calibration. A liquid container 33 is provided.

  The detection unit 21 has an electric signal corresponding to a membrane (hereinafter referred to as a microbial membrane) to which microorganisms that take in oxygen from sample water (raw water or filtered raw water) are attached and fixed, and the amount of oxygen that has passed through the microbial membrane. And a sensor for outputting.

  As the microorganism used for the microbial membrane, nitrifying bacteria are preferable, and ammonia oxidizing bacteria are particularly preferable. As an ammonia oxidizing bacterium, for example, Nitroso monase europaea ATCC25978 can be considered. This microbial membrane is prepared by, for example, suspending nitrifying bacteria in a sodium alginate aqueous solution, dropping the suspension onto a porous cellulose membrane and sandwiching it with another cellulose membrane, and gelling sodium alginate with an aqueous calcium chloride solution. To fix the cells. In addition, the detection part 21 is provided in a thermostat, For example, using nitrifying bacteria, temperature adjustment is performed so that the dissolved oxygen consumption rate which is an activity index of nitrifying bacteria is in the target control range.

  The control unit 22 is connected to the other bio-water quality monitoring device 10 via the communication unit 13 of FIG. 1 so as to be able to transmit and receive, and controls each unit of the water quality monitoring unit 11, and includes a central processing unit (CPU) and a multi-core CPU. It is conceivable to be composed of programmable devices (Field Programmable Gate Array (FPGA), Programmable Logic Device (PLD), etc.). Further, the control unit 22 includes a storage unit such as a memory such as a read only memory (ROM) or a random access memory (RAM), a hard disk, or the like. A storage unit may be provided outside the water quality monitoring unit 11.

  The display unit 23 displays a display related to water quality, a display related to control, a display (touch panel) used for input, and the like. For example, a liquid crystal display, an organic EL (electroluminescence) display, a Cathode Ray Tube (CRT) display, a printer, etc. can be considered.

The control unit 22 notifies the other water quality monitoring device of the state of the water quality monitoring device by a voltage signal (binary signal) or the like via the communication means 13 in FIG. Further, a plurality of bio-water quality monitoring device 10 may notify the state by wired communication or wireless. For example, Local Area Network (LAN) connection, Internet connection, or wireless connection may be performed. The communication unit 13 is an interface for performing LAN connection, Internet connection, or wireless connection with another computer as necessary. It also communicates with external devices such as servers.

  In the pump 26, each of a pure water container 30, a washing water container 31, a feed liquid container 32, and a calibration liquid container 33 is connected via a pipe 29. As the piping 29, for example, a pipe, a tube, or a hose may be used. In addition, the pump 25 sends a mixed solution obtained by mixing sample water, pure water, washing water, feed solution, and calibration solution as necessary using the switching unit 28 to the detection unit 21.

The pump 26 sends the source water to the filter 27. The filter 27 filters the source water and discharges the sample water.
The switching unit 28 includes a plurality of solenoid valves provided in the pipe 29, the pure water container 30, the washing water container 31, the feed liquid container 32, and the calibration liquid container 33. Switch the flow paths of cleaning water, feed liquid, and calibration liquid. The switching of the flow path is controlled by the control unit 22.

  The pipe 29 is a pipe through which sample water flows. The pure water container 30 is a tank or the like that stores pure water. The cleaning water container 31 is a tank or the like that stores cleaning water for cleaning the pipe 29. For example, cleaning using an acid such as nitric acid is conceivable. The feed liquid container 32 is a tank for storing the feed liquid. The feed liquid is a mixture of sample water and a buffer solution containing nutrients necessary for the substrate and microorganisms. The calibration liquid container 33 is a tank or the like for storing calibration liquid. The calibration solution is a buffer solution that does not contain pure water and substrate but contains nutrients necessary for microorganisms. As the substrate, for example, ammonia nitrogen may be used.

  The sample water, pure water, washing water, feed liquid, calibration liquid, and mixed liquid that pass through the detection unit 21 are aerated by an air pump or the like, and then temperature-adjusted via a heat exchanger. It is drained through.

Moreover, the structure of the water quality monitoring means 11 is not limited to the structure shown in FIG. 2, What is necessary is just a structure which can monitor water quality using microorganisms.
(Operation of Embodiment 1)
The operation of the bio-water quality monitoring apparatus according to the first embodiment will be described separately in (I) the operation principle of the bio-water quality monitoring apparatus and (II) the monitoring state transition process in the bio-water quality monitoring apparatus.
(I) Operation Principle of Bio-Water Quality Monitoring Device FIG. 3 is a diagram for explaining the measurement principle of the water quality monitoring means 11 in FIG.

Nitrifying bacteria are filled in the solidification microorganisms film housed in the detecting unit 21 of the water quality monitoring means 11 captures the ammonia NH ₄ and oxygen O _2, to produce a nitrous acid NO _2. A part of the oxygen O ₂ passing through the immobilized microbial membrane is consumed by the respiration of the nitrifying bacteria, and the rest reaches the dissolved oxygen electrode to output a constant signal output. When harmful substances are mixed in the sample water, the respiration of microorganisms is inhibited, the amount of oxygen consumed is reduced, and the amount of oxygen not consumed is increased, so that the output of the dissolved oxygen electrode is also increased. By observing the change in the output of the dissolved oxygen electrode, the presence or absence of harmful substances can be detected.

  The measurement of the bio-water quality monitoring device described above requires zero and span output calibration. Usually, the zero calibration solution is a solution in which dissolved oxygen is saturated by bubbling air through distilled water or ion exchange water at a flow rate of about 1 (l / min). In addition, since the partial pressure of saturated dissolved oxygen in water is substantially equal to the partial pressure of oxygen in the atmosphere, there is also a simple calibration method using the partial pressure of oxygen in the atmosphere.

The bio-water quality monitoring device 10 calibrates the time obtained by subtracting the maximum monitoring interruption time assumed at the time of failure / failure from the continuous monitoring time that can accurately detect harmful substances contained in sample water without calibration. It is set as the fixed period which performs. For example, when the continuous monitoring possible time is 48 hours and the maximum monitoring interruption time assumed at the time of failure / failure is 24 hours, the calibration cycle Tc is 24 hours.
(II) Monitoring State Transition Processing in Bio Water Quality Monitoring Device FIG. 4 is a flowchart showing monitoring state transition processing in the bio water quality monitoring device 10 in FIG.

  When monitoring is started, the monitoring state is entered, and the process proceeds to step S1. The control unit 22 determines whether a monitoring interruption signal is input from the receiving unit 13b, and if it is determined that the input has been input (Yes), the process proceeds to step S4. If it is determined that no input has been made (No), the process proceeds to step S2.

  In step S2, the control unit 22 determines whether the calibration start time is reached, and proceeds to step S3 until the calibration start time is reached (No) and continues the monitoring state. When the calibration start time is reached in step S2 (Yes), if the control unit 22 determines, the process proceeds to step S6.

  In step S4, the control unit 22 proceeds to step S5 and continues the monitoring state until a monitoring recovery signal is input from the receiving unit 13b (No). If the control unit 22 determines that the monitoring recovery signal is input in step S4 (Yes), the process returns to step S1.

  In step S6, the water quality monitoring means 11 shifts from the monitoring state to the monitoring interruption state, and outputs a monitoring interruption signal to the transmission means 13a. The transmission means 13a transmits a monitoring interruption signal to the other bio-water quality monitoring device 10, and proceeds to step S7.

  In step S7, the water quality monitoring unit 11 executes the calibration process, and when the calibration process is completed, the process proceeds to step S8. In step S8, the water quality monitoring unit 11 shifts from the monitoring interruption state to the monitoring state, and outputs a monitoring recovery signal to the transmission unit 13a. The transmission means 13a transmits the monitoring recovery signal to the other bio-water quality monitoring device 10, and returns to step S1.

  The flowchart shown in FIG. 4 shows the transition process of the monitoring state when the own bio-water quality monitoring device 10 is normal and the monitoring interruption signal is received before and after the calibration start time from the other bio-water quality monitoring device 10. ing. When the monitoring of the bio-water quality monitoring device 10 is interrupted for reasons other than calibration, it is not described in the flowchart of FIG. 4, but when monitoring is interrupted for reasons other than calibration, the monitoring of water quality is naturally interrupted and monitored. The interruption signal is transmitted to the other bio-water quality monitoring device 10, and when there is no reason for the interruption of the monitoring, the water quality monitoring is resumed, the monitoring recovery signal is transmitted to the other bio-water quality monitoring device 10, and then the water quality monitoring is performed. Continue.

(Effect of Embodiment 1)
According to the bio-water quality monitoring apparatus 10 of Embodiment 1 of the present invention, when a monitoring interruption signal is received before the calibration start time and no monitoring recovery signal is received until the calibration start time is reached, the calibration start time is Even if the monitoring recovery signal is received, the monitoring state is maintained until the monitoring recovery signal is received, and after the monitoring recovery signal is received, the monitoring state is shifted to the monitoring interruption state to perform the calibration process. Thereby, since the bio-water quality monitoring device 10 continues the monitoring state while the other bio-water quality monitoring devices are in the monitoring suspended state, it is possible to continuously monitor the water quality safety.

Embodiment 2

(Configuration and operation of Embodiment 2)
FIG. 5 is a system configuration diagram showing an outline of the water quality monitoring system according to the second embodiment of the present invention.
The water quality monitoring system according to the second embodiment of the present invention includes two bio-water quality monitoring devices 10-1 and 10-2, and is connected to each other by a communication line 50 capable of bidirectional communication. The communication line 50 is, for example, a twisted pair line.

  The communication performed between the two bio-water quality monitoring devices 10-1 and 10-2 via the communication line 50 is, for example, an electrical specification conforming to RS-455, a two-wire half-duplex communication method, It is a synchronous method. The communication only needs to have high reliability, and is not limited to the exemplified electrical specification and method.

  6 (a) and 6 (b) are timing charts showing the transition of the monitoring state in the water quality monitoring system of FIG. 5. FIG. 6 (a) shows the transition of the monitoring state during normal time, and FIG. ) Shows the transition of the monitoring status during maintenance and repair.

  T1 and t3 displayed in FIGS. 6A and 6B are calibration start times in the normal state of the bio-water quality monitoring apparatuses 10-1 and 10-2 in FIG. 5, and the constant period Tc is 24 hours. The time Tm required for calibration is 2 hours.

  As shown in FIG. 6A, in the normal time, the bio-water quality monitoring apparatus 10-1 maintains the monitoring state between time t0 and time t1. At time t1 of the calibration start time, the bio-water quality monitoring apparatus 10-1 shifts from the monitoring state to the monitoring interruption state, transmits a monitoring interruption signal, and calibrates during the time Tm required for calibration from time t1 to t2. Processing is executed. When the calibration process is completed at time t2, the bio water quality monitoring apparatus 10-1 transmits a monitoring recovery signal to the other bio water quality monitoring apparatus 10-2, shifts from the monitoring interrupted state to the monitoring state, and then the monitoring state. Continue to maintain.

  The bio-water quality monitoring apparatus 10-2 maintains the monitoring state between time t0 and time t3. At time t3 of the calibration start time, the bio-water quality monitoring apparatus 10-2 shifts from the monitoring state to the monitoring interruption state, transmits a monitoring interruption signal, and calibrates during time Tm required for calibration from time t3 to t4. Processing is executed. When the calibration process is completed at time t4, the other bio-water quality monitoring device 10-2 transmits a monitoring recovery signal to the bio-water quality monitoring device 10-1, and shifts from the monitoring interruption state to the monitoring state, and then the monitoring state. Continue to maintain.

  The two calibration start times t1 and t3 are usually 12 hours, which is half of the fixed period Tc (for example, 24 hours) so that the monitoring interruption states of the two bio-water quality monitoring devices 10-1 and 10-2 do not overlap. It is set with a slight shift. Usually, the bio-water quality monitoring apparatus 10-1 shifts to the monitoring state from the calibration start time t1 to the time t2 after the time Tm = 2 hours required for calibration. Therefore, the difference between the time t2 when the bio-water quality monitoring device 10-1 shifts to the monitoring state and the calibration start time t3 of the bio-water quality monitoring device 10-2 has a margin of 10 hours, and the two bio-water quality monitoring devices 10 -1 and 10-2 do not enter the monitoring interruption state at the same time.

  However, the bio-water quality monitoring apparatus 10-1 may be in a monitoring suspended state for reasons other than normal calibration processing. For example, it is assumed that the monitoring interruption state lasts from 12 hours to a maximum of 24 hours due to regular maintenance once a half year or repair of a failure. As described above, when the monitoring stop state of the bio-water quality monitoring apparatus 10-1 continues beyond the calibration start time t3 of the bio-water quality monitoring apparatus 10-2 at the time of maintenance / repair, the bio-water quality monitoring apparatus 10- When 2 shifts from the monitoring state to the monitoring interruption state and starts the calibration process, the two bio-water quality monitoring devices 10-1 and 10-2 are simultaneously in the monitoring interruption state, and the water quality safety cannot be continuously monitored.

  At the time of maintenance / repair, in FIG. 6B, the bio-water quality monitoring apparatus 10-1 maintains the monitoring state between time t0 and time t1. At time t1 of the calibration start time, the bio-water quality monitoring device 10-1 shifts from the monitoring state to the monitoring interruption state and transmits a monitoring interruption signal, and during the time t1 to t6, the monitoring interruption is performed for maintenance and repair. State. At time t6 when the maintenance / repair is completed, the bio-water quality monitoring apparatus 10-1 shifts from the monitoring interruption state to the monitoring state, transmits a monitoring recovery signal, and then continues water quality monitoring.

On the other hand, the bio-water quality monitoring apparatus 10-2 normally shifts from the monitoring state to the monitoring interruption state at the calibration start time t3, but receives the monitoring interruption signal at the time t1 before the time t3. until time t6 for receiving monitoring recovery signal, maintains the monitoring state. When the monitoring recovery signal is received at time t6, the bio-water quality monitoring apparatus 10-2 that has passed the calibration start time t3 shifts from the monitoring state to the monitoring interruption state and transmits a monitoring interruption signal. When the calibration process ends at the calibration time Tm from time t6 to t7, at time t7, the bio-water quality monitoring apparatus 10-2 shifts from the monitoring interruption state to the monitoring state and transmits a monitoring recovery signal. Thereafter, the bio-water quality monitoring device 10-2 continues water quality monitoring.

  In the example shown in FIG. 6B, the monitoring interruption time of the bio water quality monitoring apparatus 10-1 is 14 hours. However, when the monitoring interruption time reaches 20 hours, for example, the bio water quality monitoring apparatus 10 -2 continues the monitoring state for a certain period Tc.

In the example shown in FIG. 6B, since the monitoring interruption time of the bio-water quality monitoring apparatus 10-1 is abnormally prolonged, the time difference between the calibration start times of the two bio-water quality monitoring apparatuses 10-1 and 10-2. However, the calibration start times of the two bio-water quality monitoring devices 10-1 and 10-2 are set at the timing of time t5 after the elapse of the predetermined period Tc in FIG. 6B. Return to the initial settings as shown in a). In addition, the calibration start times of the two bio-water quality monitoring devices 10-1 and 10-2 are set at the time t7 when both of the two bio-water quality monitoring devices 10-1 and 10-2 are restored to the monitoring state. You may return to the initial settings.
(Effect of Embodiment 2)
According to the water quality monitoring system of the second embodiment of the present invention, when the calibration start time of one of the two bio water quality monitoring devices 10-1 and 10-2 is reached, the other When the bio-water quality monitoring device 10-1 is in the monitoring suspended state, after receiving the monitoring recovery signal transmitted by the bio-water quality monitoring device 10-1, the bio-water quality monitoring device 10-2 changes from the monitoring state to the monitoring suspended state. The calibration process is executed by shifting to step (b). As a result, while one bio-water quality monitoring device 10-1 is in the monitoring suspended state, the other bio-water quality monitoring device 10-2 continues the monitoring state, so that one bio-water quality monitoring device 10-1 is maintained, repaired, etc. Therefore, even when the monitoring is interrupted beyond the normal monitoring interruption time, the water quality safety can be continuously monitored.

Embodiment 3

(Configuration and operation of Embodiment 3)
FIG. 7 is a system configuration diagram showing an outline of the water quality monitoring system according to the third embodiment of the present invention.
The water quality monitoring system according to the third embodiment of the present invention includes three bio-water quality monitoring devices 10-1, 10-2, and 10-3, which are connected to each other via a communication line 50 and a communication network 60 so as to be able to transmit and receive each other. Has been. The communication performed between the three bio-water quality monitoring apparatuses 10-1, 10-2, and 10-3 may be a highly reliable one. A highly reliable communication network 60 is selected.

  8 (a) and 8 (b) are timing charts showing the transition of the monitoring state in the water quality monitoring system of FIG. 7, and FIG. 8 (a) shows the transition of the monitoring state in the normal state, and FIG. ) Shows the transition of the monitoring status during maintenance and repair.

  8A and 8B, the calibration start times of the bio-water quality monitoring devices 10-1, 10-2, and 10-3 in FIG. 7 are times t1, t3, and t6, respectively, and a constant cycle Tc = The time required for calibration is Tm = 2 hours.

  Normally, in FIG. 8A, the bio-water quality monitoring apparatus 10-1 maintains the monitoring state between time t0 and time t1. At time t1 of the calibration start time, the bio water quality monitoring apparatus 10-1 shifts from the monitoring state to the monitoring interruption state, and transmits a monitoring interruption signal to the other bio water quality monitoring apparatuses 10-2 and 10-3. Calibration processing is executed during the time Tm required for calibration at times t1 to t2. When the calibration process is completed at time t2, the bio water quality monitoring apparatus 10-1 transmits a monitoring recovery signal to the other bio water quality monitoring apparatuses 10-2 and 10-3, and shifts from the monitoring suspended state to the monitoring state. Thereafter, the monitoring state is maintained.

  The bio-water quality monitoring apparatus 10-2 maintains the monitoring state between time t0 and time t3. At time t3 of the calibration start time, the bio water quality monitoring device 10-2 shifts from the monitoring state to the monitoring interruption state, and transmits a monitoring interruption signal to the other bio water quality monitoring devices 10-3, 10-1. Calibration processing is executed during the time Tm required for calibration at times t3 to t4. When the calibration process ends at time t4, the bio-water quality monitoring apparatus 10-2 transmits a monitoring recovery signal to the other bio-water quality monitoring apparatuses 10-3 and 10-1, and shifts from the monitoring interruption state to the monitoring state. Thereafter, the monitoring state is maintained.

  The bio-water quality monitoring apparatus 10-3 maintains the monitoring state between time t0 and time t6. At time t6 of the calibration start time, the bio water quality monitoring device 10-3 shifts from the monitoring state to the monitoring interruption state, and transmits a monitoring interruption signal to the other bio water quality monitoring devices 10-1, 10-2. Calibration processing is executed during the time Tm required for calibration from time t6 to t7. When the calibration process is completed at time t7, the bio water quality monitoring device 10-3 transmits a monitoring recovery signal to the other bio water quality monitoring devices 10-1, 10-2, and shifts from the monitoring suspended state to the monitoring state. Thereafter, the monitoring state is maintained.

  The three calibration start times t1, t3, and t6 are normally set to a constant cycle Tc (for example, 24 hours so that the monitoring interruption states of the three bio-water quality monitoring devices 10-1, 10-2, and 10-3 do not overlap. ) Is set with a shift of about one third of 8 hours. For this reason, generally, the three bio-water quality monitoring devices 10-1, 10-2, 10-3 all monitor for about 6 hours obtained by subtracting the time required for calibration Tm = 2 hours from the difference of 8 hours in the calibration start time. The three bio-water quality monitoring devices 10-1, 10-2, 10-3 are not in a monitoring interruption state at the same time.

  However, the bio water quality monitoring device 10-1 is in the monitoring suspended state during the maintenance period, and the bio water quality monitoring device 10-2 is in the monitoring suspended state due to fault repair, and the calibration of the bio water quality monitoring device 10-3 is started. It is also assumed that at the time t6, the two bio-water quality monitoring devices 10-1 and 10-2 are simultaneously in a monitoring interruption state. In such a case, at time t8 when the monitoring recovery signal transmitted by any one of the two bio-water quality monitoring devices 10-1 and 10-2 is received, the bio-water quality monitoring device 10-3 is in the monitoring state. From the time t8 to t9, the calibration process is executed. At time t9, the bio-water quality monitoring apparatus 10-3 shifts from the monitoring interruption state to the monitoring state and transmits a monitoring recovery signal, and then continues water quality monitoring.

  In the example shown in FIG. 8B, since the monitoring interruption time of the two bio water quality monitoring devices 10-1 and 10-2 is abnormally prolonged, the three bio water quality monitoring devices 10-1, 10- The balance of the time difference between the calibration start times 2 and 10-3 is deviated from the initial setting. FIG. 8 (a) shows the calibration start time setting times of the three bio-water quality monitoring devices 10-1, 10-2, 10-3 at the time t10 after the elapse of the fixed period Tc in FIG. 8 (b). It is preferable to restore the initial settings as shown. In addition, at the time t9 when all the three bio water quality monitoring devices 10-1, 10-2, 10-3 are restored to the monitoring state, the three bio water quality monitoring devices 10-1, 10-2 are used. , 10-3 is returned to the initial setting, the balance of the time difference between the three calibration start times is quickly restored to the initial setting.

In the water quality monitoring system composed of three bio water quality monitoring devices 10-1, 10-2, 10-3 as shown in FIG. 7, the monitoring interruption time of the bio water quality monitoring device 10-1 is prolonged. If two bio water quality monitoring device 10-2 and 10-3 is normal, in the example shown in FIG. 8 (a), the monitoring time is long bio water quality monitoring device 10-3 until the next calibration time continued state, may be the bio water quality monitoring device 10-2 is short time until the next calibration time operating the normal setting manner.

(Effect of Embodiment 3)
According to the water quality monitoring system of Embodiment 3 of the present invention, at the calibration start time of one of the three bio water quality monitoring devices 10-1, 10-2, 10-3, the bio water quality monitoring device 10-3. When all of the other bio-water quality monitoring devices 10-1 and 10-2 are in the monitoring suspended state, the monitoring recovery signal transmitted by any one of the bio-water quality monitoring devices 10-1 and 10-2 After receiving this, the bio-water quality monitoring apparatus 10-3 shifts from the monitoring state to the monitoring interruption state and executes the calibration process. Thereby, while all the other bio-water quality monitoring devices 10-1 and 10-2 are in the monitoring interruption state, the bio-water quality monitoring device 10-3 continues the monitoring state, so all the other bio-water quality monitoring devices 10- Even when the monitoring is interrupted beyond the normal monitoring interruption time of 1,10-2, it is possible to continuously monitor the water quality safety.

(Modification)
The present invention is not limited to Embodiments 1 to 3, and various improvements and modifications can be made without departing from the spirit of the present invention.

  For example, in the description of the bio-water quality monitoring apparatus 10 in the first to third embodiments, an example in which nitrifying bacteria are used for the microbial membrane has been described, but the microbial membrane is not limited to nitrifying bacteria. It may be one that uses other microorganisms that are extremely vulnerable to harmful substances and that consume oxygen during their lives.

  In the second and third embodiments, the communication line 50 and the communication network 60 that connect the plurality of bio-water quality monitoring devices 10-1, 10-2,. It is not limited. For example, a wireless line and a wireless communication network may be used as long as they can ensure a certain level of reliability.

10, 10-1, 10-2, 10-3 Bio-water quality monitoring device 11 Water quality monitoring unit 12 Calibration time setting unit 13 Communication unit 13a Transmission unit 14b Reception unit 21 Detection unit 22 Control unit 23 Display unit 25, 26 Pump 27 Filtration vessel

Claims (6)

A bio-water quality monitoring device in a water quality monitoring system in which a plurality of bio-water quality monitoring devices are connected to each other so as to be able to transmit and receive each other,
Each bio-water quality monitoring device
Water quality monitoring means for monitoring harmful substances in water using microorganisms sensitive to harmful substances;
Calibration time setting means for setting a calibration start time for starting calibration for a predetermined time at a constant period in the water quality monitoring means;
A transmitting means for the water quality monitoring means transmits the monitoring interrupt signal when moving to the monitoring interruption state from the monitoring state, the water quality monitoring means transmits the monitoring restoration signal when going from the monitoring suspended state to the monitoring state,
Receiving means for receiving a monitoring interruption signal and a monitoring recovery signal from another bio-water quality monitoring device and outputting them to the water quality monitoring means, and
The water quality monitoring means includes
When it becomes pre SL calibration start time before the monitoring interrupt signal is input from the receiving unit, and shifts from the monitoring state to monitor suspended, it performs calibration processing of the predetermined time, monitoring after the calibration process ends Transition from suspended to monitored state,
When the monitoring interrupt signal from the previous SL receiving means before the said calibration start time is input, even if the calibration start time, maintains the monitoring state from said receiving means to monitor recovery signal is inputted, A bio-water quality monitoring device characterized by that. The certain period, according to claim 1, characterized in that a maximum time obtained by subtracting the monitor downtime conceivable from the maximum continuous monitoring possible time that can assure the detection capability of the toxicant in the bio water quality monitoring device, Bio-water quality monitoring device. A water quality monitoring system in which a plurality of bio water quality monitoring devices are connected to each other so as to be able to transmit and receive each other, and the water quality safety is continuously monitored
Each of the plurality of bio-water quality monitoring devices is
Water quality monitoring means for monitoring harmful substances in water using microorganisms sensitive to harmful substances;
Calibration time setting means for setting a calibration start time for starting calibration for a predetermined time at a constant period in the water quality monitoring means;
A transmitting means for the water quality monitoring means transmits the monitoring interrupt signal when moving to the monitoring interruption state from the monitoring state, the water quality monitoring means transmits the monitoring restoration signal when going from the monitoring suspended state to the monitoring state,
Receiving means for receiving a monitoring interruption signal and a monitoring recovery signal from another bio-water quality monitoring device and outputting them to the water quality monitoring means, and
The water quality monitoring means includes
When it becomes pre SL calibration start time before the monitoring interrupt signal is input from the receiving unit, and shifts from the monitoring state to monitor suspended, it performs calibration processing of the predetermined time, monitoring after the calibration process ends Transition from suspended to monitored state,
When the monitoring interrupt signal from the previous SL receiving means before the said calibration start time is input, even if the calibration start time, maintains the monitoring state from said receiving means to monitor recovery signal is inputted, Water quality monitoring system characterized by that. The certain period, according to claim 3, characterized in that the maximum time obtained by subtracting the monitor downtime conceivable from the maximum continuous monitoring possible time that can assure the detection capability of the toxicant in the bio water quality monitoring device, Water quality monitoring system. The start time of the fixed period of each bio water quality monitoring device constituting the water quality monitoring system is initially set by shifting the constant period by time divided by the number of bio water quality monitoring devices constituting the water quality monitoring system,
When the interval between the start times of a certain period in each bio-water quality monitoring device is shifted by extending the predetermined time, when all the bio-water quality monitoring devices constituting the water quality monitoring system are in a monitoring state, finally water quality monitoring system of claim 4, bio water quality monitoring device that has recovered from the monitoring suspended monitoring state at the timing of transmitting the monitoring recovery signal, performs the initial setting again, characterized in that. In order to guarantee the function of monitoring hazardous substances, the period of time obtained by subtracting the maximum possible monitoring interruption time from the maximum continuous monitoring time that can guarantee the detection ability of hazardous substances in the bio-water quality monitoring device. A water quality monitoring method for continuously monitoring the safety of water quality using a plurality of bio water quality monitoring devices that require monitoring interruption for a predetermined time,
Wherein when any one single bio water quality monitoring device among the plurality of bio-water quality monitoring device is monitoring interruption, other bio among from said one bio water quality monitoring device of the plurality of bio-water quality monitoring device A first process for transmitting a monitoring interruption signal to the water quality monitoring device;
When the monitoring interruption signal is received, at least one other of the plurality of bio-water quality monitoring devices among the plurality of bio- water quality monitoring devices reaches a monitoring interruption time according to a monitoring interruption setting for a predetermined time at the predetermined period. A second process for maintaining the monitoring state until a monitoring recovery signal is received from the one bio-water quality monitoring device that has transmitted the monitoring interruption signal.
Wherein one bio water quality monitoring device that has transmitted the monitoring interrupt signal, when the transition from the monitoring suspended monitoring state monitoring with respect to the other bio water quality monitoring device among the plurality of bio-water quality monitoring device A third process for transmitting a recovery signal;
When the other bio-water quality monitoring device receives the monitoring recovery signal before the monitoring interruption time set by the monitoring interruption setting for a predetermined time at the predetermined period, the other bio-water quality monitoring device shifts to monitoring interruption at the monitoring interruption time, A fourth process of transitioning to monitoring interruption after receiving the monitoring recovery signal when the monitoring recovery signal is received after the monitoring interruption time set by setting the monitoring interruption time of a predetermined time at a predetermined period;
Water quality monitoring method characterized by including.