KR100298811B1 - Local indicator for vibration and temperature sensor - Google Patents

Abstract

The present invention has a single detection device function by displaying the vibration value and temperature value detected by the vibration / temperature complex sensor to be displayed to the outside and transmit it to the control equipment of the upper model, and has a small condition monitoring system: The present invention relates to a local indicator for a vibration / temperature combined sensor that enables a small-scale low-cost condition monitoring network by performing a status diagnosis system to share data and communicate with each local indicator.

That is, a driving power supply unit for supplying driving voltage and current required for each sensor for driving and signal processing of the vibration / temperature complex sensor, and a sensor input unit for switching and inputting signals from each sensor at predetermined time intervals; By constructing a local indicator composed of an operation unit processing an input signal and a communication unit transmitting the same to an upper controller, it is possible to transmit the detected signal information accurately and to make the facility simple and inexpensive so that long distance transmission is possible. It is.

Description

Local indicator for vibration and temperature sensor

The present invention is a local indicator for the vibration / temperature composite sensor, more specifically, the vibration and temperature detected by the vibration / temperature composite sensor signal processing to display to the outside and transmit it to the control equipment of the upper model single detection Vibration / Temperature composite sensor that has the device function and acts as a small condition monitoring system (CMS) to enable data sharing and communication with each local indicator to establish a small-scale low-cost condition monitoring network For local indicators.

In accordance with the recent trend of process automation, vibration / temperature composite sensor is developed and used for the status diagnosis and equipment life prediction in each sector of the industry. It is applied to the field in various ways for various kinds of diagnosis.

1 is a view showing a case in which a conventional device is used as a single device in an operation mode of a system having a vibration / temperature complex sensor, and FIG. 2 schematically shows the sensor driving and output signal processing unit. Each drive method is different according to its characteristics, so there is a problem that it cannot be directly applied to the existing signal processing circuits. There was a problem in that an additional signal amplification and transmission circuit should be installed.

The present invention has been made in view of the problems of the conventional vibration / temperature composite sensor as described above, the object is for a vibration / temperature composite sensor that can easily implement the sharing and transmission of data on the detected vibration value and temperature value To provide a local indicator.

The present invention for achieving this object, the drive power supply for supplying the driving voltage and current required for each sensor for the drive and signal processing of the vibration / temperature complex sensor, and the signal from each sensor a predetermined time interval According to the configuration of the local indicator consisting of a sensor input unit for switching to the input, a calculation unit for processing the input signal, and a communication unit for transmitting the input signal to the host controller, it is possible to accurately transmit the detected signal information, as well as simple and inexpensive It is characterized in that the long-distance transmission is also possible.

1 is a schematic diagram showing an example of a system with a general vibration / temperature complex sensor,

2 is a schematic diagram of the sensor driving and output signal processing unit;

3 is a schematic diagram of a local indicator for a vibration / temperature composite sensor of the present invention;

4 is a flowchart for the local indicator of the present invention.

<Description of Symbols for Major Parts of Drawings>

10: facility 20: composite sensor

L: local indicator

Hereinafter, with reference to the accompanying drawings, the local indicator for a vibration / temperature composite sensor of the present invention will be described.

The sensor driving unit constituting the local indicator is composed of a variable constant current source and a variable constant voltage source for driving the vibration sensor and the temperature sensor to cope with various driving methods of each sensor.

The input part of the sensor output signal has a current / voltage conversion circuit and a charge amount / voltage conversion circuit so as to detect the output of the vibration / temperature complex sensor.

In addition, it is possible to convert the output of the sensor into the form of voltage in common, and input the output of the sensor to the CPU at the time required by the computing device according to the set processing algorithm, so that the signal of each sensor is required by the CPU. And it can be input at a predetermined time interval so that the input / output circuit that was imposed per one sensor as in the conventional method to use the same one circuit.

The signal thus obtained is converted into a signal format that can be transmitted using a computing device, and the data processed for a certain time is stored by itself so that it can be used for feedback when a problem occurs with the host controller. When it is possible to generate warning signal and interrupt separately from the host controller, it improves the stability of the site in case of accident.

Finally, the data converted by the computing device is transmitted to the higher model through the communication unit.

Figure 3 shows the configuration and operation of the local indicator for the vibration / temperature composite sensor of the present invention, Figure 4 shows a flow chart for the local indicator, each of a number of facilities 10 installed in each site The composite sensor 20 is mounted to display a detection signal to a processing unit (PC) installed in the field via a communication line via a local indicator having the above configuration, so that it is possible to replace a branch circuit. Compared to sensor operation, simpler and more stable operation is possible, and installation and maintenance can be more convenient.

In addition, by embedding the CPU in the board, it can operate to enable the priority treatment for the safety of the operation site by imposing basic signal processing and alarm and interrupt generation function in case of danger.

The local indicator for the vibration / temperature combined sensor of the present invention has the effect of improving the accuracy of transmission compared to the transmission method by the voltage or current of the model because the sensor output is digitally transmitted in the field and transmitted to the higher model. The long distance also has advantages in data processing and transmission, and also has the advantage of compatibility that can be installed without any additional burden on the existing CMS.

Claims (1)

A driving power supply unit for supplying driving voltage and current required for each sensor for driving and signal processing of a vibration / temperature complex sensor, and a sensor input unit for switching and inputting signals from each sensor at predetermined time intervals; And a communication unit for digitally converting the input signal and a communication unit for transmitting the digital signal to a higher level controller.