JP2002095219A - Motor operation state monitoring system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a motor operation state monitoring system which monitors an operation state of a motor when the motor is in operation and transmits the operation information to a remote site. SOLUTION: This motor operation state monitoring system includes a local unit which can access to a communication network connected to the local unit. Sensors are used for measurements of required properties concerning an operation of a motor connected to the local unit, and the local unit transmits signals corresponding to the measured properties to the communication network. A remote unit connected to the communication network receives the signals from the local unit to monitor the motor in operation remotely according to the signals.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a motor operation status monitoring system capable of transmitting and receiving operation information to and from a remote communication network remote from a site.

[0002]

2. Description of the Related Art At present, labor saving is progressing in each equipment line. There is a demand for such a labor-saving equipment to numerically grasp how the motor used in the equipment line is actually operated.

[0003]

However, conventional motors cannot store long-term operation data. For this reason, it is not enough to obtain information on how the motor is operating on a daily basis. Therefore, each time there is an abnormality in the motor, the current value, rotation speed,
At present, it is necessary to check the vibration value, temperature measurement of the main body, etc., and check whether there is any abnormality at the time of operation by measuring the actual product.

[0004] Further, since there is no accumulation of daily data on the information on the periodic or preventive maintenance of the motor, for example, after repairing excessively or operating the equipment line until it stops due to a failure, it is eventually operated. It was insufficient for efficient maintenance, such as poor efficiency. As described above, each equipment line needs information on the operation of the motor.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to provide a motor operation status monitoring system that monitors at least the operation status of a motor and transmits the operation information to a remote location. The purpose is to provide.

[0006]

According to the present invention, there is provided a motor operation status monitoring system according to the present invention.
A sensor for measuring a desired attribute relating to the operation of the motor, a local unit for transmitting a signal corresponding to the desired attribute measured by the sensor on a communication network, and a local unit connected to the communication network; A remote unit that receives a signal transmitted from the cull unit, displays desired attributes regarding the operation of the motor, and monitors at least the operation state of the motor during operation of the motor.

According to the present invention, operating data collected from the motor during operation (for example, load current value, rotation speed, vibration value, body temperature, load current curve data during motor operation, etc.)
Can be sent to a remote location for analysis as driving information. Further, the operation data can be selected and displayed based on the analysis result.

In the present invention, the motor means a motor such as a general-purpose motor for general industry, a servo motor, or the like provided on a facility line with a variable speed mechanism.

The desired attributes relating to the operation of the motor according to the present invention include operation data (for example, load current value, rotation speed, body temperature, vibration value, load current curve data during motor operation, etc.), and maintenance. It refers to information (for example, the number of times of operation). In addition, examples of the sensor for measurement in the present invention include a temperature sensor, a current sensor, a vibration sensor, a rotation sensor, a counter, and the like, and other types of sensors that can measure attributes of driving. be able to.

The local unit according to the present invention is incorporated in a motor control device or disposed adjacent to the motor. The software of the local unit can be downloaded from a remote location via a communication network. -It incorporates a function that can be reset by the command. That is, the remote unit can be reconfigured at a remote location to change metrics, or to change certain restrictions or programmed variables. For example, in order to determine whether or not the measurement standard is correct, a determination is made using a comparator connected to the processor or a determination means constituted by software, and if it is out of the range, a variable or the like can be changed. According to the present invention, since a plurality of monitor criteria are incorporated, the user can select them with different input / output cards. The input / output card is connected to a sensor box, which is attached to a specific part of the motor. These input / output cards process signals from sensors and load
Generate a signal that is accepted as an input to the cull unit.

The communication network according to the present invention is used between a local unit and a remote unit. Such communication systems can include telephone lines and other protocols for transmitting data to and from remote locations, such as mobile phones and Internet access. More simply, the site and the remote site may be connected by a serial cable. Alternatively, another protocol known in the art, such as a local area network or a wide area network, can be used to transmit data between them. Means for accessing the communication network include:
A modem operatively connected to the local unit can be used.

In the present invention, at least the operation of the motor means that the motor can be used according to a user command as well as during the operation. For example, monitoring the log only if there is a warning for a specific desired period, or re-logging the data according to the parameters.

In the present invention, monitoring a motor means
For example, it also means that a motor operation status monitoring system sends a signal to a motor maintenance person in the field via a facsimile, a mobile phone, or other mobile communication means. As a result, the necessity of maintenance can be promptly notified to the person in charge.

The remote unit is connected to the local unit by a communication network, the remote unit being adapted to receive signals from the local unit and to display measured attributes for the motor. Thus, the motor can be monitored at a remote location during operation by operation of the motor. Also,
Like the local unit, it can have the function of analyzing the measurement signal in order to determine whether the measurement standard is correct.

A sensor for measuring a desired value of the motor is connected to the local unit.
Signal can be sent to the cull unit. The local unit is adapted to transmit a remote unit signal via the communication network corresponding to the attribute to be measured.

[0016]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 discloses a schematic configuration of a hardware device according to the present invention. The motor operation status monitoring system 1 in the actual equipment (especially a shot blasting device or a shot peening device) of the present invention shown in FIG. 1 has a local unit 4 and a remote unit 5. At least one sensor 3 for measuring a desired attribute of the motor 2 is connected to the local unit 4. The sensors 3 include a temperature sensor, a current sensor, a vibration sensor, a rotation sensor, and a counter.
Are used.

The local unit 4 comprises a system for monitoring the operation status of a motor in a hardware-based equipment line including a processor, a display, a printer, and an indicator. In the present invention, the local unit 4
Can be a personal computer. Further, the local unit 4 includes a plurality of programmable memories configured as hardware or software.
It may be a logic controller (PLC) or many other types of electronic computing and processing devices. Note that the printer
Indicators are optional and not required.

The sensor 3 is connected to the local unit 4 via a signal line 6, and the signal line 6 passes a signal generated by the sensor 3 to an input / output board (not shown). This input / output board can be constituted by a signal processing system for converting the signal into a signal convenient for processing by the local unit 4 using the sensor output received on the signal line 6. .

For example, if the example of the sensor 3 is a temperature sensor that measures the temperature of a motor, a system that amplifies a weak analog signal and converts the amplified analog signal into a digital signal. The input / output board may be, for example, a multiplexer, which processes the received DC level voltage signal into a numerical signal for use in the local unit 4. The local unit 4 is connected to a storage device (not shown). Further, the main body temperature of the motor can be displayed on a monitor on the display screen of the local unit 4.

When the example of the sensor 3 is a current sensor or a rotation sensor, a signal is output from these sensors to determine whether or not the motor is operating normally by a system capable of calculating whether or not the motor is operating normally. 4 can display the load current value and the number of rotations on the display screen. When the example of the sensor 3 is a counter, the system can be operated by a signal which can be calculated by the signal from the counter and a command is issued, whereby the operation rate can be totaled and the number of times of operation can be displayed on the display screen of the local unit 4 on a monitor. .

The means for accessing the communication network is a modem operatively connected to the local unit 4, but various other types of means are used according to the communication network. can do.

Communication networks such as, for example, dedicated telephone lines, dedicated communication lines, calling telephone lines, mobile telephone systems, wireless network systems, Internet access systems, and other types of protocols for transmitting data to and from remote locations. -Is available.

Further, the communication network can be a local area network or a simple serial cable. Other types of computer-based communication cards for communicating with other communication networks are also possible.

As shown in FIG. 1, the communication network is connected to a remote unit 5. The remote unit 5 is adapted to receive signals transmitted from the local unit 4 via the communication network and to display the attributes of the motor 2 measured by the sensor 3, whereby the motor 2 During operation, the operation status can be monitored.

The indicator may be a siren, a bell, or any other type that indicates that a signal has been received by the local unit 4. In the present invention, the remote unit 5 can be a personal computer. The remote unit 5 can include a printer.

Also, the remote unit 5 can be a mobile phone, in which case the signals generated by the local unit 4 can be displayed on the mobile phone to indicate to a service representative.

In the motor operating condition monitoring system according to the present invention, a load current value monitor can be selected from many monitor functions. The load current value monitoring function is transmitted to a computable system to determine whether the current value measured from the current sensor is within an allowable range compared to the past level, and this current value and a pre-stored numerical value are transmitted. If the difference is within the allowable range, normal operation is performed. If the difference is out of the allowable range, a warning of the abnormality is issued and a stop command is issued to the motor 2 to stop the operation. -Display the load current value on the display screen of the cull unit 4.

In addition, a speed monitor function as a monitor is transmitted to a system capable of calculating whether or not the fluctuation amount of the rotation speed measured from the rotation sensor is within an allowable range as compared with the past level, and stores the rotation speed and the pre-stored value If the difference is within the allowable range, normal operation is performed. If the difference is out of the allowable range, a warning is issued and the motor 2 is instructed to stop. To display the number of rotations on the display screen of the local unit 4.

When the motor temperature is measured, a temperature change is measured by a temperature sensor. Then, for example, the temperature sensor whose output is at the DC level is connected to the multiplexer, and the online sensor output is converted into a numerical signal. The converted output signal is used for processing for the local unit 4.

The selection of the programming language and the operating system can be selected by the user according to the required function as a whole.

Since the operation of the local unit 4 can be configured by software, the setting of the local unit 4 can be updated at present or as required by a command or signal from the remote unit 5.

Furthermore, software developed for use in the remote unit 5 can analyze the measurement signals transmitted via the communication network and make decisions regarding the state of the motor 2. And, for example, in the case of a shot blasting device, smooth surface treatment can be performed.

[0033]

As is apparent from the above invention, the present invention provides a sensor for measuring a desired attribute relating to the operation of a motor and a signal corresponding to the desired attribute measured by the sensor on a communication network. A local unit for transmitting to the communication network, receiving a signal transmitted from the local unit, and displaying a desired attribute relating to the operation of the motor; Since it consists of a remote unit that monitors the operating status, the operating status of the motor is monitored during operation,
The contribution to the general industry is remarkable, such as providing a motor operation status monitoring system that transmits the data to a remote location.

[Brief description of the drawings]

FIG. 1 is a conceptual diagram showing an embodiment of the present invention.

[Explanation of symbols]

 1 Motor operation status monitoring system 2 Motor 3 Sensor 4 Local unit 5 Remote unit 6 Signal line

Claims (5)

[Claims] 1. A sensor for measuring a desired attribute related to the operation of a motor, and a signal transmitting a signal corresponding to the desired attribute measured by the sensor on a communication network.
A local unit, connected to the communication network, receiving a signal transmitted from the local unit, displaying a desired attribute relating to the operation of the motor, and monitoring at least the operating state of the motor at the time of operating the motor. And a remote unit. 2. The local unit includes a judging means for determining whether a value measured by the sensor is within a predetermined range, and the measured value is not within a predetermined range. The system according to claim 1, wherein the communication network is accessed to send a signal to the remote unit. 3. The system according to claim 2, wherein said remote unit communicates with said local unit via said communication network, and is capable of changing a predetermined range of said measured value. An operating status monitoring system for the motor as described in the above. 4. The motor according to claim 1, wherein the attributes relating to the operation of the motor include at least a load current value, a rotation speed, a vibration value, a body temperature, and load current curve data at the time of motor operation. An operation status monitoring system for a motor according to any one of the above. 5. The motor according to claim 1, wherein the motor is used for a centrifugal projection mechanism in a shot blasting device or a shot peening device.
The operation status monitoring system for a motor according to any one of the above.