JP2003131708A - Equipment monitoring system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable to cope with alternative use of a plurality of kinds of sensors easily in an equipment monitoring system. SOLUTION: This equipment monitoring system has sensors detecting the condition of a monitoring object equipment 1 and a communication terminal device 4 transmitting detected information by these sensors to a central management equipment 3, while providing a common input terminal 8t connecting plural kinds of sensors 2A, 2B, 2C, 16 and 18 selectively with the terminal devices 4. The system is provided with input control means 7, 8 and 12 which perform input processing of detected information by the sensors from the common input terminal 8t by the input mode adapted to the classification of the connected sensor according to the classification information of the connected sensor, and is also provided with sensor classification setting means 25, 26 and 29 which give the input control means 7, 8 and 12 classification information on the connected sensors of the common input terminal 8t.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device monitoring system for monitoring deployed devices (for example, valves typified by steam traps and fluid devices typified by pumps) in factories and plants. The present invention relates to a device monitoring system that includes a sensor that detects a state of a target device and a communication terminal device that sends detection information of the sensor to a central management device.

[0002]

2. Description of the Related Art Conventionally, in this type of equipment monitoring system, the above-mentioned terminal device outputs the detection information of the sensor connected to its input terminal in one fixed input mode (that is, one fixed input mode suitable for the type of connected sensor). The input processing can be performed only in the processing mode). In other words, only one specific type of sensor can be connected to the input terminal.

[0003]

However, in this conventional system, when different types of sensors are used according to the type of equipment to be monitored and the monitoring items, the specifications depending on the type of sensor used Therefore, there is a problem that the system cost is increased because the terminal device must be prepared for production.

Further, in the case where a plurality of terminals are provided, if the types of sensors connected to the respective terminals are different, it is necessary to provide a plurality of terminals having different specifications. There was also a problem that system construction and management became complicated and difficult.

In view of this situation, the main problem of the present invention is to
By adopting a rational input mode for inputting the sensor detection information in the terminal, the above problem is effectively solved.

[0006]

SUMMARY OF THE INVENTION [1] The invention according to claim 1 relates to a device monitoring system, which is characterized by a sensor for detecting the state of a device to be monitored, and a central management device for detecting information of the sensor. In the configuration of providing a terminal device for communication to be sent to a terminal, the terminal device is provided with a common input terminal for selectively connecting a plurality of types of the sensors, and input processing of sensor detection information from the common input terminal is connected to the sensor. An input control means for executing in an input mode suitable for the type of the connected sensor according to the type information of the connected sensor, and a sensor type setting means for providing the input control means with the connected sensor type information for the common input terminal. There is a point.

In other words, in this configuration, the input information of the terminal device is controlled by adding the type information of the sensor (that is, the selected one type of sensor) connected to the common input terminal to the input control means by the sensor type setting means. The means appropriately executes the input processing of the sensor detection information from the common input terminal in the input mode suitable for the type of the connected sensor for the common input terminal.

Therefore, according to this configuration, it is possible to deal with the difference in the type of the used sensor by adding the type information of the used sensor, and the specification according to the sensor type is provided for each type of the used sensor. It is possible to eliminate the need for preparing a terminal device, which makes it possible to reduce the system cost as compared with the conventional system described above. In addition, when the types of sensors connected to each of the terminals are different when deploying multiple terminals, it is possible to eliminate the need for deploying multiple terminals with different specifications and use terminals with common specifications. As a result, system construction and management can be facilitated compared to conventional systems.

Incidentally, in order to make the terminal device have a common specification for the selective use of a plurality of types of sensors, as another method, a method in which a plurality of mutually different input terminals of corresponding sensor types are provided in the terminal device can be considered. However, in this case, since the plurality of input terminals having different corresponding sensor types are provided, the terminal device becomes large.

On the other hand, in the case of the above-mentioned configuration of the invention according to claim 1, since the common input terminal for selectively connecting a plurality of types of sensors is provided in the terminal device, the terminal device is more compact than the other method. Therefore, it is possible to easily deploy the terminal device to the sensor facility location (in other words, the facility location of the monitored device).

According to the first aspect of the present invention, the sensor type setting means is provided in the terminal together with the input control means, or the sensor type setting means is provided in a place different from the terminal. Either of these may be adopted.

In the embodiment of the invention according to claim 1, the sensor type setting means adds the type information of the connected sensor to the common input terminal to the input control means. A format in which the type information of the connected sensor is given to the input control means by input, a format in which the type information of the connected sensor is given to the input control means by reading the information from the storage medium in which the type information of the connected sensor is written, or switching It is possible to adopt various formats, such as a format in which the type information of the connected sensor is given to the input control means by a switching operation of the switch indicating the type information of the connected sensor depending on the state. In some cases, the sensor connected to the common input terminal can be used. It is possible to adopt a format in which the type information of the connected sensor is given to the input control means from itself. .

[2] The invention according to claim 2 specifies an embodiment suitable for carrying out the invention according to claim 1, and is characterized in that the sensor type setting means is provided in the central management device. Then, the type information of the connection sensor for the common input terminal is given to the input control means by communication from the central management device to the terminal device.

That is, according to this configuration, since the central management device can perform the operation of giving the connection sensor type information to the input control means of the terminal device, the sensor type setting means is equipped in the terminal device and is provided at the sensor facility location. It is possible to facilitate the operation of giving the connected sensor type information to the input control means, as compared with the case of performing the operation of giving the connected sensor type information with the terminal device.

In particular, when a plurality of terminals are distributed and arranged, the central management device can perform the operation of giving the connection sensor type information to the input control means of each of the plurality of terminals, so that the terminals of the distributed arrangement are distributed. It is possible to greatly facilitate the operation of giving the connection sensor type information as compared with the operation of giving the connection sensor type information by each of the vessels.

Further, according to the above construction, by equipping the central management unit with the sensor type setting means, the terminal type can be made more compact as compared with the case where the sensor type setting means is equipped in the terminal. As a result, it is possible to more easily deploy the terminal device at the location of the sensor facility.

In implementing the invention according to claim 2, when the sensor type setting means provided in the central management unit is such that connection sensor type information is given to the input control means of each of the plurality of terminals, By configuring the sensor type setting means to individually provide the connection sensor type information for each input control means of each terminal device, it is possible to cope with different types of connection sensors for common input terminals of each of the plurality of terminal devices. be able to.

[3] The invention according to claim 3 specifies an embodiment suitable for carrying out the invention according to claim 1 or 2, and is characterized in that a plurality of the common input terminals are provided in the terminal device. The input control means is configured to perform the input processing of the sensor detection information from each of the plurality of common input terminals according to the connected sensor type information for each common input terminal provided by the sensor type setting means. The point is that the processing is performed in the input mode suitable for the type of the connected sensor for each input terminal.

That is, according to this configuration, a plurality of types of sensors can be selectively connected to each of the plurality of common input terminals provided in the terminal device, so that a plurality of types of sensors can be used without being restricted by the types of sensors. The sensor can be connected to one terminal, which can effectively reduce the number of terminals to be deployed, which can further reduce the system cost and reduce the system cost. Construction and management can be made easier.

[4] The invention according to claim 4 relates to claim 1 to claim 1.
A preferred embodiment for carrying out the invention according to any one of 3 above is specified, and the feature thereof is that the sensor type setting means sets the type information of the connected sensor to each of a plurality of types of sensor detection information. Is specified to the input control means, and the input control means omits the input processing of the sensor detection information which has received unnecessary specification in the specification information given from the sensor type setting means. In this input mode, the input processing of the plural types of sensor detection information is executed.

That is, in this configuration, when the sensor connected to the common input terminal is, for example, a sensor of a type that can only acquire the first sensor detection information among the first to third types of sensor detection information. If, as the designation information, information that designates the second and third sensor detection information among these three types of sensor detection information as unnecessary is given to the input control means,
The input control means performs only the input processing of the first sensor detection information in the input mode in which the input processing of the second and third sensor detection information is omitted (that is, the input mode adapted to the type of the connected sensor at that time). Run. …… (Example 1)

Further, if the sensor connected to the common input terminal is a sensor of a type capable of acquiring the second and third sensor detection information among the three types of sensor detection information of the first to third types, then those three If the input control means is provided with information designating that the first sensor detection information is unnecessary among the various types of sensor detection information, the input control means omits the input processing of the first sensor detection information (input mode (connection at that time). The input processing of the second and third sensor detection information is executed in an input mode suitable for the type of sensor. … (Example 2)

Further, the sensor connected to the common input terminal is a sensor of a type capable of obtaining the second and third sensor detection information among the three types of sensor detection information of the first to third types as described above. In some cases, if the input control means is provided with information designating that the first and second sensor detection information are unnecessary among the three types of sensor detection information, the input control means will be provided with the first and second sensor detection information. In the input mode in which the input processing of (3) is omitted (this is also an input mode suitable for the type of connected sensor at that time), only the input processing of the third sensor detection information is executed. … (Example 3)

That is, in the above-described configuration, by designating whether or not the input processing is required for each of the plurality of types of sensor detection information, a form corresponding to the difference in the type of the connected sensor with respect to the common input terminal is adopted. , Above (Example 3)
As described above, while using a sensor (so-called composite sensor) capable of acquiring detection information of a plurality of types of sensors, if necessary,
It is also possible to easily input and process only a part of the sensor detection information of the plurality of types of sensor detection information that can be acquired, thereby improving the adaptability and functionality of the system to various conditions. Can be effectively increased.

[5] The invention according to claim 5 relates to claims 1 to 1.
An object of the present invention is to specify a preferred embodiment for carrying out the invention according to any one of 4 above, which is characterized in that the input control means performs analog processing of a signal of sensor detection information input from the common input terminal. According to a processing program, a signal of sensor detection information processed by the circuit section and its analog circuit section is digitally processed in an input mode suitable for the type of the connected sensor according to the type information of the connected sensor given by the sensor type setting means. A digital circuit section that
It is configured by a storage unit that stores the processing program in a rewritable state.

That is, according to this configuration, when the signal of the sensor detection information processed by the analog circuit section is digitally processed by the digital circuit section in the input mode suitable for the type of the sensor connected to the common input terminal, the digital circuit is processed. Since the processing program to be executed by the unit is stored in the storage unit in a rewritable state, it is stored in the storage unit without changing the digital circuit unit in order to perform the function change treatment on the terminal device. The function of the terminal can be changed only by rewriting the processing program (in some cases, rewriting the processing program that involves the replacement of the analog circuit section), thereby reducing the cost required for the function changing procedure and using the system. It is possible to secure high responsiveness to changes in conditions and improvements in system functions.

According to the fifth aspect of the present invention, if the analog circuit section is separately mounted on a board different from the mounting board for the digital circuit section, the above-mentioned function change accompanied by replacement of the analog circuit section is performed. Treatment can be facilitated.

[0028]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a monitoring system for monitoring the state of a large number of steam traps 1 distributed and distributed in factories, plants, etc. using wireless communication. In addition to being equipped with a sensor 2 for detecting the state, a plurality of terminals 4 for communication for exchanging information with the central control device 3 by wireless communication are located near each of the traps 1 in charge and deployed. The equipment sensor 2 of each charge trap 1 is connected via a lead wire 5.

Further, a plurality of repeaters 6 are arranged in a distributed manner, and these repeaters 6 relay wireless communication between each of the terminals 4 and the central control device 3 (in this example, spread spectrum wireless communication). To do.

As shown in FIG. 2, the terminal device 4 includes a single terminal device 4S (a terminal device having a common input terminal 8t, which will be described later) capable of connecting only one sensor 2 and a plurality of sensors 2. There are two types, that is, a multi-use terminal device 4M that can be connected in parallel (a plurality of terminal devices having a common input terminal 8t described later), and any of the terminal devices 4 (4S, 4M) is a microprocessor as shown in FIG. , A digital circuit section 7 for inputting the detection information of the sensor 2 connected to the common input terminal 8t, a communication section 9 for transmitting and receiving information using the antenna 9a, the analog circuit section 8 and the communication section 9 The analog circuit unit 8 of the multi-use terminal 4M includes a power supply control unit 10 for controlling power supplied to the power supply unit 11, a power supply battery 11, a storage unit 12 for storing setting information, and an alarm light 13 using an LED. , Multiple common inputs An input switching switch circuit 8a for inputting detection information connecting the sensor 2 to the terminal 8t sequentially is provided.

The digital circuit section 7 of each terminal device 4 is cyclic at every set time (for example, a time selected from the range of 1 minute to 24 hours) according to the setting information provided from the central management unit 3 by wireless communication. Or at a set time, the analog circuit unit 8 is changed from the dormant state to the awake state by the power supply control by the power supply control unit 10, and the detection information of the connection sensor 2 is input (in the multi-use terminal 4M, the digital circuit unit 7 is used).
The detection information of the plurality of connection sensors 2 is sequentially input by operating the input switching switch circuit 8a), and after this input processing, the power supply control unit 10 controls the supplied power to return the analog circuit unit 8 to the sleep state again. .

In this input process, the signal of the sensor detection information (analog signal output from the connected sensor 2) input from the common input terminal 8t is A / D converted after the analog process in the analog circuit 8, Digital circuit section 7
In step 1, digital processing is performed according to the processing program stored in the storage unit 12.

Then, the digital circuit section 7 of each terminal unit 4
Following the input processing of the sensor detection information, the communication unit 9 is changed from the sleep state to the awake state by the power supply control by the power supply control unit 10, and the sensor detection information processed by the digital circuit unit 7 is transmitted to the central management unit 3. At the same time, it receives instruction information from the central management unit 3, and after this communication processing, the power supply control unit 10 controls the power supply to return the communication unit 9 to the sleep state again.

That is, in this way, the analog circuit section 8 and the communication section 9 are awakened only when necessary by controlling the power supply, thereby saving power consumption, and thereby the power supply battery 11
Makes replacement unnecessary for a long period of time.

The digital circuit section 7 of each terminal 4 is
When the communication unit 9 receives a signal from the central management device 3 addressed to itself in the dormant state, the communication unit 9 is temporarily set to the awake state in order to respond to the signal.

The digital circuit section 7 of each terminal 4 is
The output voltage of the power supply battery 11 and the signal strength of the signal received by the communication unit 9 are monitored, and the function check of the connection sensor 2 and the function check of each part of the terminal unit are performed according to the instruction from the central management unit 3. When the output voltage drops below the set value, the signal strength of the received signal falls below the set value, or when an abnormality is detected by the function check of the connection sensor 2 and each part of the terminal, an abnormal signal is output. The warning light 13 is transmitted to the central control unit 3
Blink to notify the system administrator of these situations.

There are three types of sensors 2, namely, a vibration temperature sensor 2A, a vibration sensor 2B and a temperature sensor 2C. The vibration temperature sensor 2A has a vibration d of the ultrasonic wave level of the trap 1.
And the temperature ts of the trap 1 and the ambient temperature to of the trap 1 are detected, the vibration sensor 2B detects only the vibration d of the ultrasonic level of the trap 1, and the temperature sensor 2C detects the temperature ts of the trap 1. And the ambient temperature to of the trap 1 are detected, and each of the traps 1 is equipped with any one of these three types of sensors 2A to 2C depending on the type of the trap 1 and the monitoring item. .

Further, the common input terminal 8t of each terminal 4 is not limited to the selective connection of the above-mentioned three kinds of sensors 2A to 2C, but as shown in FIG. Open / close sensor 16 for detecting the open / closed state os of the valve 15 interposed in the steam supply pipe 14 (or the pipe internal pressure p of the steam supply pipe 14 or the pipe internal pressure p of the condensate inflow pipe 17 connected to each trap 1). Pressure sensor 18)
Can also be selectively connected via the lead wire 5.

The digital circuit section 7 of each terminal 4 receives the sensor detection information from the common input terminal 8t, and at the time of each input processing, the connection sensors 2A, 2B, 2C, 16 (for the common input terminal 8t). Regardless of the type of 18),
According to the above processing program, the detection information of the trap vibration d, the detection information of the trap temperature ts, the detection information of the trap ambient temperature to, and the detection information of the valve open / closed state os (or the pipe internal pressure p) are set at a set cycle ΔTs (for example, 40 m).
s) is configured to sample the set number of times n. For this configuration, each detection information d, ts, to, os
By setting the sampling number n of (p) from the central management device 3 according to the type of the connection sensor 2A, 2B, 2C, 16 (18) for the common input terminal 8t, the connection sensor 2A, 2B for the common input terminal 8t. , 2C, 16 (1
It corresponds to the type of 8).

That is, for the common input terminal 8t to which the vibration temperature sensor 2A is connected, the number of samplings n for the detection information of the valve open / closed state os (or the pipe internal pressure p) is n.
Is set to 0, and for the common input terminal 8t to which the vibration sensor 2B is connected, the detection information of the trap temperature ts, the detection information of the trap ambient temperature to, and the detection information of the valve open / closed state os (or the pipe internal pressure p), respectively. Is set to 0, and the common input terminal 8t to which the temperature sensor 2C is connected is sampled n times for the detection information of the trap vibration d and the detection information of the valve open / closed state os (or the pipe internal pressure p). Is set to 0, and the common input terminal 8t to which the open / close sensor 16 for detecting the valve open / closed state (or the pressure sensor 18 for detecting the pipe internal pressure) is connected, the detection information of the trap vibration d, the detection information of the trap temperature ts, the trap By setting the sampling number n for each of the detection information of the ambient temperature to to 0, the connection sensors 2A, 2B, 2 , So as not to perform an unnecessary sampling per 16 (18), which connects the sensor 2
It corresponds to the types A, 2B, 2C, 16 (18).

That is, in the monitoring system of this embodiment,
The input processing of the sensor detection information from the common input terminal 8t in each terminal device 4 is performed according to the connection sensor type information given from the central management device 3 to the connection sensors 2A, 2B, 2C,
The input mode is adapted to the 16 (18) types. Specifically, as described above, the connection sensor type information includes a plurality of types of sensor detection information d, ts, to, o.
By assigning to each terminal device 4 from the central management device 3 the information specifying whether or not each s (p) is necessary (information indicating whether the number of times of sampling n is 0 or a positive value) is assigned to each terminal device 4. In the input mode in which the input processing for the sensor detection information that has been unnecessary specification (designation of sampling number n = 0) in the specification information is omitted, a plurality of types of sensor detection information d, ts, to, os ( The input processing of p) is performed.

By adopting this input processing form,
The connection sensor for the common input terminal 8t can be easily provided only by providing the connection sensor type information (the above specified information) by communication from the central management device 3 while making the terminal device 4 a common specification and reducing the system cost. 2A, 2B, 2
C, 16 (18) types can be supported.

Regarding the common input terminal 8t which is not connected to the sensor, all the sensor detection information d, ts, to, os.
This is dealt with by setting the sampling number n for (p) to 0.

Further, the digital circuit section 7 of each terminal device 4
Is an input process for each time of inputting sensor detection information, and
In each subsequent communication process, each connected sensor 2
For each of the detection information d, ts, to, os (p) input from A, 2B, 2C, 16 (18), n sampling data are averaged and the averaged data is used as sensor detection information. Sent to the central management unit 3 as
As a result, compared to transmitting all sampling data as sensor detection information to the central management device 3, the amount of transmission data is reduced to further reduce power consumption, and the plurality of terminals 4 and the central management device 3 are connected. Prevents communication congestion between users.

The digital circuit section 7 of each terminal 4 is
Based on the detection information of the trap vibration d input from the vibration temperature sensor 2A or the vibration sensor 2B, the operation number m of the target trap 1 (especially the disk type trap) during the sampling period of n times for the vibration detection information is It detects and transmits the detection information of the number m of operations to the central management device 3 together with the detection information of other sensors.

On the other hand, the storage unit 12 of each terminal unit 4 stores the above processing program in a state in which the rewriting operation by communication from the central management unit 3 is possible. Sensor detection information d, ts,
In the case where each terminal device 4 is subjected to a function change treatment such as changing the type of to, os (p) or the number of types, or changing the processing form of the signal indicating the sensor detection information,
Even if the storage processing program in the storage unit 12 is rewritten (in some cases, the processing program is rewritten with the replacement of the analog circuit unit 8) without replacing the digital circuit unit 7, it is possible to cope with a considerable change in function. There is.

Further, in each terminal device 4, the analog circuit section 8 is separately mounted on a board different from the board on which the digital circuit section 7 is mounted, whereby the above-mentioned function change requiring replacement of the analog circuit section 8 is performed. It is easy to do.

Each terminal 4 is not limited to the power supply battery 11, but may be a general commercial power supply, a private power supply, or an auxiliary power supply such as a solar battery.

As shown in FIG. 4, each repeater 6 has a digital circuit section 19 using a microprocessor and an antenna 20.
A communication unit 20 that transmits and receives information using a, and a power receiving unit 2 that receives power supplied from a general commercial power source or a private power source
1, a storage unit 22 for storing setting information, a warning light 23 using an LED, and a backup battery 24 for a power failure, and the digital circuit unit 19 of each relay 6 includes a communication unit 2
When 0 receives a signal, it is determined whether or not the received signal should be relayed, based on the identification code attached to the received signal and the communication path information for each relay 6 stored in the storage unit 22. Then, when the received signal is a signal to be relayed, a relay process of converting the received signal into a transmission signal and transmitting from the communication unit 20 is performed.

The communication path information stored in the storage unit 22 of each repeater 6 (see FIG. 6) is as follows: the link repeater 6 that bears the same communication path as itself, and the link repeaters 6 including itself. The relationship between the subordinates and the linked relays 6 including the self-representative terminal 4 are shown (in short, a communication guide), and the digital circuit unit 19 of each relay 6 determines the above-mentioned determination. As the relay processing based on the above, for the upstream signal destined to the central management device 3, only the reception signals from the lower-order link relay device 6 under direct control and the terminal device 4 under direct control are relayed, and
As for the downlink signal from the central control device 3, it is a received signal from the direct upper control relay device 6 or the direct central control device 3 and has the direct control jurisdiction terminal 4 or the lower control relay device 6 Only the received signal addressed to the subordinate relay device 6 is relayed, whereby wireless communication between the plurality of terminal devices 4 and the central management device 3 is performed by a single communication path for each of the terminal devices 4. To do.

That is, by performing the wireless communication between the terminal device 4 and the central control unit 3 by a single communication path for each of the terminal devices 4 by this relay system, a plurality of terminal devices 4 and a plurality of relay devices are provided. Even if the device 6 is provided, wireless communication can be smoothly and efficiently performed while effectively preventing communication disruption.

Depending on the positional relationship with the central control device 3, there is also a non-relaying terminal device 4 that directly performs wireless communication with the central control device 3 without the relay by the relay device 6.

The digital circuit section 19 of each repeater 6
As with the terminal device 4, while monitoring the signal strength of the signal received by the communication unit 20, the function check of each part of the repeater is performed according to the instruction from the central management device 3, and the signal strength of the received signal falls below the set value. When an abnormality is detected or when an abnormality is detected by the function check of each part of the repeater, an abnormality signal is transmitted to the central control unit 3 and the alarm lamp 23 is blinked to notify the system administrator of the situation.

As shown in FIG. 5, the central management unit 3 includes a personal computer main body 27 having an arithmetic control unit 25 using a microprocessor and a storage unit 26 using a hard disk, a display unit 28, a keyboard 29, etc. The wireless modem 30 is connected together with the peripheral devices of the relay device 6 and the repeater 6 is used by using the wireless modem 30.
And wireless communication with the terminal device 4.

The arithmetic control unit 25 (the arithmetic control unit of the computer main body 27) of the central management unit 3 has the above-mentioned sensor detection information d, ts, to, os (p) sent from each terminal 4.
And whether the steam trap 1 is in a normal state, a steam leakage abnormality, a clogging abnormality, or a temperature abnormality based on the detection information m or the number of times of operation, and when the abnormality is diagnosed, the abnormality trap 1 is identified. Information such as the code, the type of abnormal occurrence, and the installation location of the abnormal trap is displayed on the display device 28, and the terminal device 4 in charge of the abnormal trap 1 is instructed to blink the alarm light 13 by communication.

Further, the arithmetic control unit 25 of the central management unit 3
Records, for each trap 1, the sensor detection information and the number-of-operations detection information sent from the terminal 4, and the result of the above-mentioned diagnosis based on the detection information in the trap monitoring database in the storage unit 26.

It should be noted that the steam leakage abnormality is an abnormality in which the steam exceeds the permissible limit, while the essential function of the steam trap is to discharge only the condensed water while blocking the outflow of the steam. The clogging abnormality is an abnormality in which condensate is not discharged smoothly, and the temperature abnormality is an abnormality in which the trap temperature ts or the trap ambient temperature to deviates from the proper range to the lower side or the higher side.

Further, the clogging abnormality is generally detected trap temperature ts due to the temperature decrease of the condensed water inside the trap.
Of the trap temperature ts by the vibration temperature sensor 2A and the temperature sensor 2C, and the opening / closing of the steam trap 1 for which a high clogging abnormality detection accuracy is required in this system. The clogging abnormality is detected (diagnosed) based on the detection information of the valve open / closed state os by the sensor 16 (or the detection information of the pipe pressure p by the pressure sensor 18). The situation in which the interposition valve 15 in the supply pipe 14 is in an open state (or the steam supply pipe 14 or the condensate inflow pipe 17
When the detected trap temperature ts falls below the set value when the pipe internal pressure p is above the set value), it is determined that the clogging is abnormal.

Further, the arithmetic control unit 25 of the central management unit 3
When an abnormal signal is received from the repeater 6 or the terminal device 4 for the above-mentioned function check or signal strength reduction, the identification code of the abnormal repeater 6 or the abnormal terminal device 4, the occurrence abnormal kind,
Information such as the installation location of the abnormal repeater 6 or the abnormal terminal device 4 is displayed on the display device 28, and the occurrence of an abnormality in the repeater 6 or the abnormal terminal device 4 is recorded in the system management database in the storage unit 26. .

On the other hand, although the communication between the plurality of terminals 4 and the central control unit 3 is performed by a single communication path for each of the terminals 4, the central control unit 3 determines the communication path. Automatically according to the decision program as follows.

That is, the arithmetic control unit 2 of the central management unit 3
5 is instructed to execute the route determination process, the storage unit 26
Based on the registration information of each repeater 6 that is pre-entered in the system management database inside, non-relaying interrogation communication is sequentially performed with respect to all the interrogators 6, and the central management device performs this interrogation communication. The repeater 6 having the response communication to 3 is determined as the repeater 6 having the highest relay stage (that is, the highest repeater that directly wirelessly communicates with the central management unit 3 without using another repeater 6). Perform the initial process.

Further, following this initial step, the arithmetic and control unit 25 of the central control unit 3 causes the repeater 6 determined in the stage in the previous step.
Are sequentially set as interrogation side relays 6, and under the relay by the interrogation side relays 6, the interrogators 6 whose stages are undecided from the interrogation side relays 6 (that is, the relays that have not yet received the response communication). Non-relaying interrogation communication is sequentially performed for each of the above, and the repeater 6 that has responded to the interrogation side repeater 6 in response to this interrogation communication,
At that time, the subsequent process of determining the subordinate relay device 6 under the direct control of the interrogator 6 on the interrogating side is repeated.
With respect to the above, the dendritic relay route network in which only one upper relay 6 is directly determined is automatically determined.

The arithmetic control unit 25 of the central management unit 3
After the determination of the relay route network, each terminal device 4 previously input to the system management database in the storage unit 26 is
Based on the registration information of the interrogator 6, the interrogators 6 are sequentially changed to the interrogator 6 under the intermediary of the interrogator 6, and the terminal device 4 (which has not been determined to be in jurisdiction from the interrogator 6). That is, the non-relaying interrogation communication is sequentially performed to each of the terminal devices (which have not yet received the response communication), and the terminal device 4 that has responded to the interrogation side relay device 6 in response to this interrogation communication is At this time, the final process of determining the terminal device 4 of the interrogator 6 on the calling side is executed.

That is, the arithmetic control unit 25 of the central management unit 3
Performs wireless communication with the central management device 3 for each of the terminals 4 by the automatic determination of the relay route network by the above initial step and the subsequent steps and the automatic determination of the jurisdiction terminal by the above final step. A communication path network as shown in FIG. 6 for performing a single communication path is automatically determined for all the processes between the central management unit 3 and each terminal device 4, and this determined communication path network is used as a system. It is registered in the system management database in the storage unit 26 as information for management and communication processing.

The arithmetic control unit 25 of the central management unit 3
Performs non-relaying interrogation communication to each terminal device 4 prior to the initial step, and determines the terminal device 4 that has responded to the central management device 3 to this interrogation communication as the non-relaying terminal device 4. In the form, the non-relay terminal 4 that directly performs wireless communication with the central management device 3 without the relay 6 is also automatically determined.

In determining the communication path, the central management unit 3
The arithmetic and control unit 25 of the above-mentioned operation control unit 25, when there is a repeater 6 which finally does not have the response communication in the above-mentioned initial process and the subsequent process, and when the terminal device 4 which does not finally have the response communication in the above-mentioned final process, If there is, the relay device 6 and the terminal device 4 which have not finally received the response communication are configured to be informed by the display of the identification code on the display device 28 and the display of the installation location. When there is a notification of the repeater 6 that has not finally received the response communication at the end stage of the subsequent process, the central management unit performs measures such as adjusting the installation place of the repeater 6. Arithmetic control unit 25
To re-execute the initial process and the subsequent process, and when there is a notification of the terminal device 4 that has finally received no response communication at the end stage of the final process, the terminal device 4 and the nearby repeater 6 After taking measures such as adjusting the installation location of
The arithmetic control unit 25 of the central management unit 3 is made to re-execute the final process.

The arithmetic control unit 25 of the central management unit 3
In each of the above-mentioned initial process, subsequent process, and final process, only when the signal strength of the response communication from the repeater 6 or the terminal device 4 is equal to or more than the set value, it is determined that the response communication is made, and The relay device 6 and the jurisdiction terminal device 4 are determined so that the automatic determination of the communication path as described above can be made more accurate and effective in ensuring a good wireless communication function. To do.

Furthermore, each repeater 6 is processed by the digital circuit section 19 so as to carry the same communication path as itself at each repetition of the subsequent steps, and the repeater 6 is regarded as a coordinating repeater 6 and has a higher and lower relationship. With own storage unit 2
2 by additionally registering, and by registering the jurisdiction terminal device 4 of each of the linked repeaters 6 including itself in the storage unit 22 of itself in the final process, the central management device 3 automatically determines the communication path. At the same time, the communication path information (communication guide) for each repeater 6 as described above is constructed in its own storage unit 22.

After the automatic determination of the communication path network as described above, the arithmetic control unit 25 of the central management unit 3 performs various operations for each terminal unit 4 and each relay unit 6 according to the instruction of the system builder or the manager. The necessary setting processing of (1) is performed by wireless communication using the determined communication path network.

Regarding the setting of the number of times of sampling n for each terminal device 4 (that is, the addition of the designation information) in the setting process, the arithmetic control unit 25 of the central management unit 3 sets the system in the storage unit 26. Each connected sensor 2A, 2B, 2C, 16 (18) is based on the registered information of the connected sensor previously input to the management database and the setting reference for each sensor 2A, 2B, 2C, 16 (18).
The number of samplings n (the number of samplings n of each of a plurality of types of sensor detection information d, ts, to, os (p)) according to the type of is automatically performed by wireless communication for each of the common input terminals 8t in each terminal device 4. Set.

Note that a plurality of types of sensor detection information d, ts,
The sampling number n of each of to and os (p) can be set and changed for each common input terminal 8t of each terminal device 4 by a keyboard operation in the central management device 3.

In summary, in the present embodiment, the analog circuit section 8, the digital circuit 7, and the storage section 12 in each terminal 4 store the sensor detection information d, ts, to, os (p) from the common input terminal 8t. The connection sensor 2A, 2B, 2C, 16 is inputted according to the type information (the designation information) of the connection sensor given the input processing from the central management device 3.
An input control means for executing the input mode suitable for the type (18) is configured.

Further, the arithmetic control unit 25, the storage unit 26, and the keyboard 29 in the central management unit 3 are sensors which give the type information (the designation information) of the connected sensor to the above-mentioned input control means in each terminal 4. It constitutes a seed setting means.

[Other Embodiments] Next, other embodiments will be listed.

In the implementation of the invention according to claim 1, the connected sensor type information given to the input control means of the terminal 4 by the sensor type setting means is the designation information (a plurality of types of sensor detection information) shown in the above embodiment. The common input terminal 8t is not limited to the information specifying the necessity of each)
Any information may be used as long as it can cause the input control means of the terminal 4 to execute the input processing of the sensor detection information from the input processing unit in the input mode suitable for the type of the connected sensor.
It may be information indicating the type itself of the connected sensor for the common input terminal 8t.

Further, a concrete example of the input control means for executing the input processing of the sensor detection information from the common input terminal 8t according to the connected sensor type information given by the sensor type setting means in the input mode suitable for the connected sensor type. The physical configuration is not limited to the configuration shown in the above embodiment, and various modifications can be made.

The terminal device 4 may be either the single terminal device 4S or the multi terminal device 4M,
Also, a plurality of types of multi-use terminals 4 having different numbers of connected sensors are provided.
You may make it use M.

In the above-mentioned embodiment, an example in which the terminal device 4 is arranged in the vicinity of the monitored device 1 (steam trap) has been shown.
The terminal device 4 may be integrally mounted on the monitoring target device 1 and equipped.

Communication between the terminal device 4 and the central control device 3 may be carried out without using the relay device 6, or
The communication is not limited to the spread spectrum wireless communication, and various wireless communication methods or various wired communication methods can be adopted.

The equipment to be monitored is not limited to the steam trap, but a valve, a pump, a fan, a tank, a heat exchanger,
It may be a machine tool or the like, and the present invention can be applied to monitoring various machines.

Further, each of the plurality of types of sensors selectively connected to the common input terminal 8t of the terminal device 4 is not limited to the vibration sensor, the temperature sensor, the pressure sensor, the valve opening / closing sensor, etc. Alternatively, various sensors can be adopted according to the monitoring target device and the monitoring purpose.

[Brief description of drawings]

FIG. 1 is a schematic plan view showing the entire monitoring system.

FIG. 2 is a perspective view showing a terminal device.

FIG. 3 is a block diagram showing a configuration of a terminal device.

FIG. 4 is a block diagram showing a configuration of a repeater.

FIG. 5 is a perspective view showing the configuration of a central management device.

FIG. 6 is a diagram showing a communication path network.

[Explanation of symbols]

1 Monitored device 2A sensor 2B sensor 2C sensor 3 Central management device 4 terminal 7 Input control means, digital circuit diagram 8 Input control means, analog circuit 8t common input terminal 12 Input control means, storage unit 16 sensors 18 sensors 25, 26, 29 Sensor type setting means

Continued front page    F-term (reference) 5H215 AA01 BB05 BB12 CC07 CX05                       CX08 GG02 HH08 KK04 KK07                 5H223 AA01 BB01 DD07 EE06 EE11                       EE18                 5K048 BA23 BA34 DA02 DB01 DC01                       HA03

Claims (5)

[Claims] 1. A sensor for detecting a state of a monitored device,
And a device monitoring system provided with a terminal device for communication that sends detection information of this sensor to a central management device, wherein the terminal device is provided with a common input terminal for selectively connecting a plurality of types of the sensor, Provided is input control means for executing the input processing of the sensor detection information from the common input terminal in an input mode suitable for the type of the connected sensor according to the type information of the connected sensor, and the type information of the connected sensor for the common input terminal. A device monitoring system provided with a sensor type setting means for providing the input control means. 2. The sensor type setting means is provided in the central control device, and the type information of the connected sensor for the common input terminal is given to the input control means by communication from the central control device to the terminal device. The device monitoring system according to claim 1, which is configured to: 3. The terminal device is provided with a plurality of the common input terminals, and the input control means is provided with a plurality of common input terminals according to the connection sensor type information for each common input terminal provided by the sensor type setting means. 3. The device monitoring system according to claim 1, wherein the input processing of the sensor detection information from each of the input terminals is executed in an input mode suitable for the type of the connected sensor for each of the common input terminals. 4. The input control means is configured such that the sensor type setting means assigns, to the input control means, designation information indicating necessity of each of a plurality of types of sensor detection information as type information of the connected sensor. Is configured to execute the input process of the sensor detection information of the plurality of types in an input mode in which the input process of the sensor detection information which is unnecessary specified in the specification information given from the sensor type setting means is omitted. The device monitoring system according to claim 1. 5. An analog circuit section for analog-processing the sensor detection information signal input from the common input terminal by the input control means, and a sensor detection information signal processed by the analog circuit section according to a processing program. A digital circuit section for digitally processing in an input mode suitable for the type of connection sensor according to the connection sensor type information given by the sensor type setting means; and a storage section for storing the processing program in a rewritable state. The device monitoring system according to claim 1, wherein the device monitoring system is configured by.