KR101387672B1 - Integrity evaluation system for sensor - Google Patents

Abstract

The present invention discloses an apparatus for evaluating the health of a sensor for directly applying a specific frequency quantified to the sensor to be evaluated and detecting the output from the sensor to provide characterization, recording, and management.
The present invention provides a keypad for selecting conditions of health evaluation of the sensor; An excitation unit for oscillating a specific frequency under the control of the control unit and inputting vibration or sound waves to a sensor in direct contact; Set the evaluation condition of the sensor according to the selection of the keypad, operate the excitation part by oscillating a specified frequency according to the set evaluation condition, and detect and analyze the response speed and the voltage intensity of the sensor according to the specified frequency. A control unit for evaluating the health of the control unit; A display unit for displaying the soundness evaluation condition and the analyzed evaluation result in a predetermined format according to a signal applied to the control unit; And a memory for storing the soundness evaluation result of the sensor according to the control of the control unit in the designated area for each evaluation date.

Description

Sensor health evaluation device {INTEGRITY EVALUATION SYSTEM FOR SENSOR}

The present invention relates to an apparatus for evaluating the health of a sensor. More particularly, the present invention relates to a sensor for providing a characteristic analysis, recording, and management by directly applying a specific frequency quantified to an sensor to be evaluated, and detecting an output from the sensor. The present invention relates to a soundness evaluation device.

In order to diagnose or analyze the normal operation, leaks, leaks and failures of various facilities installed in industrial sites and power plants, a valve leak diagnosis system, a boiler tube leak detection system, and a metal debris monitoring system are provided.

The above diagnostic and monitoring systems collect signals such as vibrations and sound generated during operation of equipment from at least one sensor installed at major failure points of facilities that are not easily accessible to personnel and difficult to secure due to their characteristics. The following set of programs can be analyzed to diagnose and analyze the normal operation of the equipment, leakage and leakage.

Since the sensor is installed in a harsh environment in which high temperature, high temperature steam, and the like are generated, the characteristics of the sensor change with deterioration or durability.

Therefore, the health of the sensor should be assessed regularly or from time to time to provide reliability in diagnosis and analysis of leaks, leaks, failures, and the like.

Conventionally, as can be seen in FIG. 3 to evaluate the health of the sensor, at the installation site, the measuring device 20 such as a scope meter is connected to the output of the sensor 10 and then the signal input of the sensor 10. A physical impact sound is applied using a metal ball, a hammer, or the like. At this time, the evaluator visually confirms the shape of the signal measured by the measuring device 20 to evaluate the health of the sensor.

This method can determine only the simple operation of the sensor, but there is a disadvantage in that accurate measurement cannot be provided for the characteristic change due to deterioration or durability of the sensor, thereby providing reliability in the evaluation of the characteristic of the sensor.

In addition, there is a disadvantage in that an accurate evaluation that the portability and ease of equipment is not provided in a poor field environment is not provided.

Registered Patent Publication No. 10-1050772 (2011.07.21.) Utility Model Registration No. 20-0380335 (2005.03.29.)

The present invention was developed to solve such a problem, and its object is to provide a health evaluation device of a sensor that directly applies a specific frequency quantified to the sensor to be evaluated, and detects an output from the sensor to provide characterization, recording, and management. To provide.

In addition, the present invention is to provide a health evaluation that has a specific frequency quantified, and the ability to analyze the output signal of the sensor in a portable device to provide reliability in poor field environment.

In addition, the present invention provides a measurement function of a single mode (Sweep Mode) and a sweep mode (Sweep Mode) so that the analysis of the signal and the characteristic analysis by frequency can be provided as needed.

Features in accordance with an embodiment of the present invention include a keypad for selecting a condition for health assessment of a sensor; An excitation unit for oscillating a specific frequency under the control of the control unit and inputting vibration or sound waves to a sensor in direct contact; The evaluation condition of the sensor is set according to the selection of the keypad, the oscillator is operated by oscillating a specified frequency according to the set evaluation condition, and detecting and analyzing the response speed and the voltage intensity of the sensor according to the oscillated specified frequency. A controller for evaluating the health of the sensor; A display unit for displaying the health evaluation condition and the analyzed evaluation result in a predetermined format according to a signal applied to the control unit; According to the control of the controller is provided a health evaluation apparatus of the sensor including a memory for storing the results of the health evaluation of the sensor in the designated area for each evaluation date.

The keypad includes a plurality of function keys, a selection key, an execution key, and a stop key, and may be installed at a predetermined position of the main body and one side of the display.

The excitation unit oscillator for oscillating a specified frequency under the control of the controller; A transducer for converting the specified frequency oscillated by the oscillator into vibration or sound wave; It may include an excitation plate for directly applying the vibration or sound wave of the specified frequency converted in the transducer to the contacted sensor.

The control unit may include a sensor name, an evaluation mode, an excitation frequency, a range of an excitation frequency, a screen scale, a screen display method, a current time, an amplification gain, an output voltage of a sensor, an output of an evaluation result, and the like, according to an input of the keypad. You can set the storage conditions.

The controller may evaluate the health of the sensor in either a single mode using a single frequency or a sweep mode using a specified range of frequencies.

The controller may control the excitation unit to oscillate a specified single frequency for single mode evaluation or to oscillate a specified range of frequencies for sweep mode evaluation step by step.

The control unit may provide a history management according to the durability by comparing and analyzing the characteristics and health evaluation results of the sensor for each day.

As a result of the health evaluation of the sensor, the controller may store the history management in an external memory connected to the USB port to provide a precise analysis by an external device.

As described above, the present invention can directly analyze, record, and manage output characteristics of the sensor by directly applying a specific frequency quantified to the sensor to be evaluated, thereby providing reliability in the health evaluation of the sensor.

In addition, it can be provided as a portable device to provide convenient use and reliable health evaluation in harsh field environments.Always, single-mode and sweep modes provide continuous signal analysis and frequency-specific analysis. Therefore, there is an effect of providing a reliable health assessment regardless of the type of sensor.

1 is a view schematically showing an apparatus for evaluating the health of a sensor according to an embodiment of the present invention.
2 is a view showing a display screen of the soundness evaluation apparatus of the sensor according to an embodiment of the present invention.
3 is a diagram illustrating a conventional sensor health measurement method.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention.

The present invention may be embodied in many different forms and is not limited to the embodiments described herein.

In order to clearly illustrate the present invention, parts not related to the description are omitted, and the same or similar components are given the same reference numerals throughout the specification.

In addition, since the components shown in the drawings are arbitrarily shown for convenience of explanation, the present invention is not necessarily limited to those shown in the drawings.

1 is a view schematically showing an apparatus for evaluating the health of a sensor according to an embodiment of the present invention.

Referring to FIG. 1, the present invention includes a keypad 101, a display 102, an input / output processor 103, a controller 104, an oscillator 105, a transducer 106, an excitation plate 107, and a first amplifier. 108, filter 109, second amplifier 110, A / D converter 111, memory 112, SPI processor 113, USB port 114, printer driver 115, printer 116 ) And the power supply unit 120.

The keypad 101 may set general conditions for evaluating the health of various types of sensors 200 installed in the field.

The keypad 101 includes a plurality of function keys (F1 to F10), a selection key (◀ ▲ ▶ ▼), an execution key (RUN), a stop key (STOP), etc. for setting evaluation conditions, and are manufactured to be portable. The main body of the device is installed at a predetermined position.

The keypad 101 is a sensor name setting, evaluation mode setting, excitation frequency setting, excitation frequency range setting, screen scale setting, screen display method setting, time setting, amplification gain setting, sensor output voltage to evaluate the health Set the settings, output and save the evaluation results.

The keypad 101 may be configured as a touch button on one side of the display 102 as shown in FIG. 2.

The keypad 101 may be configured at predetermined positions of the main body and one side of the display 102, respectively.

The display 102 may be configured as a liquid crystal display, and displays general information according to the progress of health evaluation of the sensor 200 in a predetermined format.

As shown in FIG. 2, the display 102 includes an evaluation mode (Single or Sweep), an excitation frequency Freq, a name of the evaluation module Tran, and an evaluation target sensor 200 of the sensor 200. Tag, battery information, time information, sensor output voltage [Gen (Vpp)], amplification gain (PA / MA), X-axis screen scale (0kHz / div), Y-axis screen scale (0.5V / div ) And the like.

The input / output processor 103 processes the selection signal input by the touch button configured on the keypad 101 or the display 102 as a signal that can be recognized by the controller 104 and provides it to the controller 104.

In addition, the input / output processor 103 may process the overall information according to the health evaluation condition and the health evaluation progress of the sensor 200 applied by the controller 104 to be displayed on the display 102.

The input / output processor 103 drives the oscillator 105 according to a control signal applied from the controller 104 to oscillate a frequency of a specified band for evaluating the health of the sensor 200.

The controller 104 operates the oscillator 105 in accordance with the condition of the health evaluation of the sensor 200 selected by the keypad 101 to oscillate a frequency of a specified band having a set signal strength and input the same to the evaluation target sensor 200. Then, the characteristics and soundness of the sensor 200 are evaluated by comparing the voltage and the reaction rate output from the evaluation target sensor 200 with a set reference value.

The controller 104 displays the characteristics and the health evaluation results of the sensor 200 on the display 102 and stores the evaluation date in the designated area of the memory 112.

The controller 104 compares the characteristics and the soundness evaluation results of the sensor 200 by date to provide history management according to the progress of the durability.

The controller 104 may store the characteristic and health evaluation result of the sensor 200 and the result of history management in an external memory connected to the USB port 114.

The controller 104 may output the characteristics and the health evaluation results of the sensor 200 in a format set through the printer 116.

The oscillator 105 oscillates a frequency of a specified band according to a signal applied from the input / output processor 103 and provides it to the transducer 106.

The oscillator 105 oscillates a single frequency of a specified band for single mode evaluation or a specified range of frequencies for sweep mode evaluation according to the signal applied from the input / output processor 103.

The transducer 106 converts the specified frequency applied from the oscillator 105 into a vibration or sound wave having a set intensity and provides it to the excitation plate 107.

The excitation plate 106 is in contact with the sensor 200 to be evaluated, and directly excites the sensor 200 with vibration or sound waves of a specific frequency converted through the transducer 106.

Therefore, the sensor 200 outputs a voltage according to the vibration or sound wave of the specified frequency which is directly excited.

The first amplifier 108 may be configured as a pre-amp. The first amplifier 108 may amplify a voltage output from the sensor 200 to a predetermined gain to provide the filter 109.

The filter 109 may be configured as a band pass filter, and removes noise by passing only a specific band of the voltage amplified and applied to the first amplifier 108.

The second amplifier 110 may be configured as a main amplifier (Main-Amp), amplifies the voltage passing through the filter 109 to a set gain and provides it to the A / D converter 111.

The gain of the first amplifier 108 and the second amplifier 110 can be artificially adjusted by the evaluator through the keypad 101, and the excessive amplification gain can cause output distortion, so it is selected as an appropriate gain.

The A / D converter 111 converts the voltage of the analog signal state amplified and applied through the second amplifier 110 into a digital signal that can be recognized by the controller 104.

The memory 112 stores the output voltage of the sensor 200 converted into a digital signal through the A / D converter 111 in a designated area under the control of the controller 104.

The memory 112 stores the results of health assessment of the sensor 200 analyzed and evaluated by the controller 104 in a designated area.

The memory 112 stores the health evaluation history of the sensor 200 according to the progress of the analyzed and evaluated duration in the controller 104.

The SPI processor 113 provides a serial / parallel interface between the controller 104 and an external memory connected to the USB port 114.

The USB port 114 provides a connection of external memory.

The printer driver 115 operates the printer 116 under the control of the controller 104 to output the result of the health evaluation of the sensor 200 in a set format.

The printer 116 may be any one of a thermal method, a laser method, and an inkjet method, and typically a thermal method may be applied.

The power supply unit 120 may be configured as a secondary battery provided with charge and discharge, and may include an overvoltage / overcurrent protection circuit therein.

The power supply unit 120 supplies power required for operation to various load elements (internal circuits) of the health evaluation device of the sensor provided to be portable.

The power supply unit 120 may be connected to an adapter for down and rectifying commercial power to provide charging of a secondary battery.

The power supply unit 120 may supply the output power of the adapter to the various load elements (internal circuits) as operating power.

The operation of the present invention including the functions as described above is executed as follows.

First, inputting general conditions for evaluating the health of the sensor 200 using a plurality of function keys F1 to F10 and selection keys ◀ ▲ ▶ ▼ configured in the keypad 101 input / output processor 103 ) Converts the analog input signal of the keypad 101 into a digital signal that can be recognized by the controller 104 and provides it to the controller 104.

Accordingly, the controller 104 sets general conditions for evaluating the health of the sensor 200 according to the input of the keypad 101.

Setting conditions for evaluating the health are the name of the sensor, evaluation mode, excitation frequency, range of the excitation frequency, screen scale, screen display method, evaluation time, amplification gain, sensor output voltage, output and storage of the evaluation results, etc. It includes.

The evaluation mode may be set to any one of a single mode that continuously has a single frequency to the evaluation target sensor 200 and a sweep mode that gradually varies a specified frequency range.

For example, when the excitation frequency is set in the sweep mode, the excitation frequency may be set to be varied in steps up to 500 kHz at intervals of 10 kHz.

The screen display method is to set the X-axis to the time domain (Y Domain), Y-axis to the frequency domain (Frequency Domain) to be output as a graph, the screen scale is the X-axis time unit of 10us, 20us, 50us, 100us It can be set to 200us, and Y-axis frequency can be set to 5kHz, 10kHz, 20kHz, 50kHz, 100kHz.

The time may be set to be displayed as year, month, day, hour, minute, and second, and time correction may be performed when there is an error in the countered time information and the current time.

The setting of the amplification gain may set the amplification range of the first amplifier 108 to 1/10/100/1000 times, and the recommended amplification gain is preferably 1 times, for example, and the amplification range of the second amplifier 110. Can be set from 1 to 15 times, and the recommended amplification gain is preferably 15 times, for example.

Since setting excessive amplification gain in the setting of the amplifying gain may cause output distortion for the transient input, an appropriate gain setting is recommended.

The output voltage of the sensor 200 may be set, for example, in the range of 1.0V to 3.0V.

The controller 104 displays the health evaluation conditions of the sensor 200 set according to the input of the keypad 101 as shown in FIG. 2 attached to the display 102 as described above.

That is, the evaluation mode (Single or Sweep) of the sensor 200, the excitation frequency Freq, the name of the evaluation module (Tran), the name of the sensor 200 (Tag), the battery information, the current time, the output voltage of the sensor [ Gen (Vpp)], amplification gain (PA / MA), X-axis screen scale (0 kHz / div), Y-axis screen scale (0.5 V / div), and the like.

The controller 104 operates the oscillator 105 through the input / output processor 103 to set the evaluation condition when the general condition for the health evaluation of the sensor 200 is completed according to the input of the keypad 101. Oscillates the frequency of the specified band and provides it to the transducer 106.

At this time, the oscillator 105 oscillates a single frequency of a specified band for single mode evaluation or oscillates a specified range of frequency for sweep mode evaluation according to a signal applied from the input / output processor 103.

The transducer 106 converts a specific frequency applied from the oscillator 105 into a vibration or sound wave having a set intensity and provides it to the excitation plate 107.

The excitation plate 106 excites the vibration or sound wave of the specified frequency converted through the transducer 106 directly to the sensor 200 of the contacted evaluation object.

Accordingly, the sensor 200 outputs a voltage to the first amplifier 108 according to the vibration or sound wave of the specified frequency that is directly excited.

The first amplifier 108 configured as a preprocessing amplifier amplifies the voltage output from the sensor 200 to a gain set by the keypad 101 and provides it to the filter 109.

The filter 109 composed of a band pass filter passes only a specific band of the voltage amplified by the first amplifier 108 and applied to the second amplifier 110 which is a main amplifier.

The second amplifier 110 amplifies the voltage passing through the filter 109 to the gain set by the keypad 101 and provides it to the A / D converter 111, the A / D converter 111 of the analog signal state The voltage is converted into a digital signal and provided to the controller 104.

Therefore, the controller 104 evaluates the characteristics and health of the sensor 200 by comparing the output voltage and the response speed of the evaluation target sensor 200 input from the A / D converter 111 with the set reference value by the operation of an internal program. do.

The controller 104 displays the characteristics and the health evaluation results of the sensor 200 on the display 102 and stores the evaluation date in the designated area of the memory 112.

In addition, the controller 104 compares the characteristics and health evaluation results of the sensor 200 by date to provide a history management according to the progress of the durability.

The controller 104 may store the history management result of the characteristics and health of the sensor 200 in an external memory connected to the USB port 114 through the SPI processor 112.

Therefore, the soundness evaluation and the characteristic analysis can be provided using a separate analysis device or a PC in which a precise analysis program is set.

The controller 104 may output the characteristics and the health evaluation results of the sensor 200 in a format set through the printer 116.

The control unit 104 may vary the specified frequency at intervals set in the sweep mode to have a frequency in a range of about 50 sections, and detect the reaction speed and voltage of the sensor 200 to execute health evaluation and characteristic analysis. .

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. It will be understood that various modifications and changes may be made without departing from the scope of the appended claims.

101: keypad 102: display
103: input and output processor 104: control unit
105: oscillator 106: transducer
107: Exciter 108: the first amplifier
109 filter 110 second amplifier
111: A / D converter 112: memory
113: SPI processor 114: USB port
115: printer driver 116: printer

Claims (10)

A keypad for selecting condition of health evaluation of the sensor;
An excitation unit for oscillating a specific frequency under the control of the control unit and inputting vibration or sound waves to a sensor in direct contact;
The evaluation condition of the sensor is set according to the selection of the keypad, the oscillator is operated by oscillating a specified frequency according to the set evaluation condition, and detecting and analyzing the response speed and the voltage intensity of the sensor according to the oscillated specified frequency. A controller for evaluating the health of the sensor;
A display unit for displaying the health evaluation condition and the analyzed evaluation result in a predetermined format according to a signal applied to the control unit;
A memory for storing the soundness evaluation result of the sensor according to the control of the controller in a designated area for each evaluation date;
Lt; / RTI >
An input / output processor disposed between a keypad as an input / output element of an analog signal and a controller as an input / output element of a digital signal to process input / output signals of the keypad and the controller, the display and the controller;
A first amplifier for amplifying the voltage output from the sensor with a set gain;
A filter for removing noise by passing only a specific band of the voltage applied from the first amplifier;
A second amplifier for amplifying the voltage passing through the filter to a set gain;
An A / D converter for converting a voltage of an analog signal state applied from the second amplifier into a digital signal that can be recognized by a controller;
A USB port providing access to an external memory;
An SPI processor providing a serial / parallel interface between the controller and an external memory connected to the USB port;
A printer for outputting a health evaluation result of the sensor in a set format;
A power supply unit including an overcurrent / overvoltage protection circuit and configured of a secondary battery;
Soundness evaluation device of the sensor further comprising. The method of claim 1,
The keypad includes a plurality of function keys, a selection key, an execution key, and a stop key, wherein the health evaluation apparatus of the sensor is installed at a predetermined position of the main body and one side of the display. The method of claim 1,
The excitation unit oscillator for oscillating a specified frequency under the control of the controller;
A transducer for converting the specified frequency oscillated by the oscillator into vibration or sound wave;
An excitation plate for directly applying a vibration or sound wave of a specific frequency converted by the transducer to a contacted sensor;
Health evaluation device of the sensor comprising a. The method of claim 1,
The control unit may include a sensor name, an evaluation mode, an excitation frequency, a range of an excitation frequency, a screen scale, a screen display method, a current time, an amplification gain, an output voltage of a sensor, an output of an evaluation result, and the like, according to an input of the keypad. Sensor health evaluation device for setting storage conditions. The method of claim 1,
The control unit is a health evaluation device of the sensor for evaluating the health of the sensor in either a single mode using a single frequency or a sweep mode using a specified range of frequencies. The method of claim 1,
And the control unit controls the excitation unit to oscillate a specified single frequency for single mode evaluation or to oscillate a specified range of frequencies for sweep mode evaluation step by step. The method of claim 1,
The control unit is a health evaluation device of the sensor for providing a history management according to the durability by comparing and analyzing the characteristics and health evaluation results of the sensor for each day. delete The method of claim 1,
The control unit is a health evaluation device of the sensor, the result of the health evaluation of the sensor, the health management device of the sensor for providing a precise analysis by the external device by storing the history management in an external memory connected to the USB port. The method of claim 1,
The power supply unit is connected to the adapter to down and rectify the commercial power supply to provide a charge of the secondary battery, the health evaluation device of the sensor for supplying the output power of the adapter to the load element (internal circuit) as the operating power.

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