KR20040100446A - Smart Sensor using Bluetooth Technology - Google Patents

Abstract

PURPOSE: A smart sensor applying wireless communication and a vibration measuring method thereby are provided to prevent noise and to cut down time and cost by real-time measuring and analyzing vibration with a PDA or a portable terminal. CONSTITUTION: A smart sensor is composed of a sensing unit(10) contacted to the measured object to measure signals from equipments, a signal processing unit(20) converting into analog or digital signals by filtering the signals and real-time processing into FFT(Fast Fourier Transform) signals, a wireless transmitting and receiving unit(30) transmitting and receiving the signals from the signal processing unit through a wireless module, a base unit(40) supporting the sensing unit contacted to the measured object, and a power supply unit(50) supplying power to drive the sensor.

Description

Intelligent Sensor with Wireless Communication Technology and Vibration Measurement Method Using It {Smart Sensor using Bluetooth Technology}

The present invention relates to an intelligent sensor using a wireless communication technology that can measure and manage the vibration generated in various facilities of the industrial site in real time in a remote place, and a vibration measuring method using the same, in particular, remote facility management, hazardous area, explosion-proof In the case of regional distances between managed objects and management sites, such as areas, radioactive areas, polluted areas, water and sewage establishments or bridges, they can be effectively managed at low cost.

In general, many mechanical products such as motors, compressors, engines inevitably generate vibration and noise during operation. In particular, vibration and noise generated from AC motors which are most commonly used as power sources are known to be caused by various mechanical and electrical causes.

The vibration and noise characteristics (size and frequency) of the motor are linked to the dynamic characteristics of mechanical parts such as a fan assembled with the motor, causing resonance, which greatly deteriorates the vibration and noise quality of the final product. Often.

Recently, the demand for vibration analysis is gradually expanding its scope. The largest area is widely used in various experiments (automobiles, ships, mechanical designs), diagnostic systems for buildings and bridges, as well as vibration analysis systems for the efficient management of mechanical equipment used in general industries.

As the effectiveness of the system for analyzing the mechanical equipment by analyzing the vibration signal is verified, the demand for this is rapidly increased, and if there is a regional distance between the management object and the management place such as water and sewage offices or bridges, it will be possible to effectively manage it at low cost. It is expected.

In addition, the vibration sensor used to detect vibration in an industrial device, the vibration is detected using a piezoelectric effect using the pressure fluctuation generated by the vibration when the shock is applied from the outside or the vibration is detected by a stimulus other than the impact Is converted into a voltage and converted to an electrical signal before being amplified.

Sensors for detecting vibration include an ultrasonic sensor or an infrared sensor, and these sensors mainly use a method of receiving at a receiver by using reflection and disconnection of a transmitted signal.

Conventionally, as shown in FIG. 1, the vibration sensor of the vibration measuring system transmits an analog signal measured through a cable, that is, the initial installation cost is consumed by the use of a cable, and noise due to the influence of the surrounding environment ( Noise and signal distortion is severe.

In addition, the use of a cable is difficult to manage and preserve due to the limitation of distance due to short circuit and data transmission.

In addition, since only the signal can be measured as a function of the sensor, there is a disadvantage in that the processing speed in the signal processor is loaded when several signals are simultaneously received.

In addition, the analysis of the measured vibration signal is possible only in a portable terminal or a personal terminal in a separate control room (Control Room), which does not overcome the limitation of the place.

In addition, the FFT analyzer related to the vibration sensor had a problem of about 200 billion won per year because it depends on the total imports.

In order to solve the above problems, it is required to switch to the next generation intelligent sensor incorporating current IT technology.

Therefore, an object of the present invention is to overcome the noise and the surrounding environment and distance limitations due to the existing problems by converting the wired method to the wireless method, and to reduce the time or cost for the initial installation.

In addition, the vibration signal analysis program is embedded in a portable terminal such as a PDA to allow data to be analyzed in real time and to perform vibration analysis in real time, so that vibration measurement and analysis can be performed very easily even under harsh environmental conditions. have.

In addition, the present invention analyzes the pattern of the failure of the various equipment driving unit (motor, reducer) to make it data to make it possible to utilize as a data that can automatically diagnose the failure in the long term to differentiate from the existing sensor.

Hereinafter, with reference to the accompanying drawings of the present invention will be described in more detail the configuration and effect and the like.

1 is an exemplary view showing a configuration of a conventional vibration measuring system,

2 is an exemplary view showing a schematic configuration of a vibration measuring system to which the present invention is applied;

3 is an exemplary view showing a configuration of an intelligent sensor according to the present invention;

4 is a flowchart of a vibration measuring system according to the present invention;

<Explanation of symbols for the main parts of the drawings>

10: sensing unit

20: signal processing unit

30: wireless transmitter and receiver

40: base part

50: power supply

S: intelligent sensor

The present invention enables the real-time acquisition of vibration signals generated from machinery facilities such as remote areas, hazardous areas or areas where vibration measurement is difficult, and the obtained analog signals are converted into digital signals and then stored as digital signals or digital signals Intelligent Fourier Transfrom (FFT) signal processing required for vibration analysis through Digitizer Signal Processor (DSP) and intelligent sensor with wireless transmission / reception function using wireless communication module or general information that can receive wireless data The vibration signal analysis program built in the device (Note Book, PDA) is characterized in that it is configured to enable vibration measurement and analysis.

As shown in FIG. 3, the intelligent sensor S of the present invention is in close contact with a specific surface and detects a variety of signals from various equipments. A signal processor 20 (A / D, DSP) for processing the FFT signal in real time after the conversion, and a wireless transmitter, receiver (30: antenna) for transmitting and receiving the signal processed by the signal processor 20 through a wireless module And a base part 40 supporting the sensing part 10 in close contact with a specific surface, and a power supply part 50 for supplying power for driving the sensor S having the above-described configuration. Doing.

In another aspect, the present invention comprises the steps of fixing the intelligent sensor to the machine to be measured, measuring the vibration signal by the intelligent sensor; converts and stores the analog signal measured by the intelligent sensor into a digital signal or digital signal processing apparatus Processing a fast Fourier transform (FFT) signal necessary for vibration analysis through a DSP, and measuring and analyzing the data in real time using a vibration signal analysis program embedded in an information device capable of receiving wireless data. Another characteristic is the vibration measuring method using an intelligent sensor.

As described above, the present invention can obtain the vibration signal generated from the facility to which the intelligent sensor S is fixed by fixing the intelligent sensor S in advance so as to be in close contact with a specific surface of the machine to measure the vibration. To be.

At this time, the measured data is filtered by the signal processing unit 20 to convert the analog signal into a digital signal, and then processes the FFT signal necessary for vibration analysis through a DSP and uses the wireless (wireless communication) module for wireless transmission and reception. Vibration signal analysis program built in intelligent sensor or general information device (Note Book, PDA) that can receive wireless data will measure and analyze vibration.

As described above, the present invention uses an intelligent sensor combined with domestic IT technology in a facility requiring vibration measurement to provide a system equipped with vibration analysis software in a small information device such as a recent PDA. .

Vibration measurement system using the intelligent sensor of the present invention is also capable of constant monitoring and management in areas where vibration measurement is difficult, such as remote sites, bridges, hazardous areas, explosion-proof areas.

In addition, the analyzer can be measured and analyzed at the remote office as well as the facility diagnosis in the field through the portable analyzer which can transmit and measure the signal measured from the facility wirelessly and measure and analyze the vibration. By enabling automatic analysis of failure patterns, it is possible to effectively prevent equipment failures in advance.

On the other hand, the present invention combines the latest IT technology to intelligent sensors to increase the wireless transmission distance, transmission speed, while producing a more compact (Compact) size for the improvement of the resonance frequency and precision.

In addition, by increasing sensitivity and frequency range, it is easy to measure and improve the storage capacity to prevent the loss of measured data and to facilitate the self-diagnosis function.

As described above, according to the present invention, by configuring a portable analyzer capable of vibration measurement and analysis using data transmitted wirelessly from an intelligent sensor having a self-diagnostic function, in particular, vibration measurement, such as remote site, bridge, dangerous area, explosion-proof area, etc. Regular monitoring and management in these difficult areas can be done smoothly.

In addition, the measured signal from the facility has the advantage that can be easily measured and analyzed in the office as well as wireless diagnostics in the field.

In addition, the analyzed data is a very useful invention having an effect such as the automatic management of the failure pattern by the integrated management of this can effectively prevent the equipment failure in advance.

Claims (2)

The sensing unit 10 in close contact with a specific surface and measuring various signals from various equipments, a signal processing unit 20 for filtering the acquired signals and processing them into FFT signals in real time after A / D conversion, and the signal processing unit ( The signal processed from 20) includes the base unit 40 supporting the wireless transmission and reception unit 30 which transmits and receives through a wireless module, and the sensing unit 10 which is in close contact with a specific surface. Intelligent sensor applying the wireless communication technology, characterized in that it comprises a power supply unit 50 for supplying the power required to drive the sensor (S). Securing the intelligent sensor to the machine to be measured, Measuring a vibration signal generated at a machine by the intelligent sensor; Converting and storing the analog signal measured by the intelligent sensor into a digital signal or processing a fast Fourier transform (FFT) signal for vibration analysis through a digital signal processing device (DSP); Measuring and analyzing the data in real time using a vibration signal analysis program embedded in an information device configured to receive wireless data; Vibration measurement method using an intelligent sensor, characterized in that consisting of.