KR100349882B1 - Multiple metering apparatus - Google Patents

Abstract

The present invention relates to a multi-function measuring device for easily and efficiently performing various functions for analyzing or displaying various sizes or shapes of signals. According to the present invention, at least one of a digital multimeter, an oscilloscope, a frequency counter, a frequency generator, and a logic analyzer function is selected by a user operation of a function selection key and a function selection dial, and the signal conversion unit is external from the device Receives an input signal, performs signal distribution, amplification, and digital conversion for size and shape adjustment, and a data processing unit configured using an application specific integrated circuit performs data processing of signals output from the signal conversion unit. And outputs a measurement signal according to the selected measurement function, the display unit displays the output measurement signal, and the controller outputs a control signal for controlling performance of various measurement functions.

Description

Multifunctional measuring device {MULTIPLE METERING APPARATUS}

The present invention relates to a multi-function measuring instrument, and more particularly, to a multi-function measuring apparatus for easily and efficiently performing the display and analysis of the size or shape of various signals.

Equipment that displays or analyzes the magnitude or shape of signals generated by electrical, electronic, and communication devices includes, for example, multimeters, oscilloscopes, frequency counters, and function generators. And logic analyzers.

Among these various equipments, the multimeter measures current, voltage, and resistance, and the oscilloscope measures how the magnitude of the signal changes over time with the input electrical signal.

In addition, the frequency generator generates frequencies having various periods, and the frequency counter counts the input frequencies.

Various instruments as described above are configured separately according to functions, and limitedly configured to allow other functions to be performed in addition to one function.

Accordingly, in order to measure or analyze signals generated from electrical, electronic and communication devices, users have to purchase a plurality of measuring instruments configured for each function as described above.

In addition, instruments such as oscilloscopes, frequency generators are also difficult to carry because of their large size and heavy.

Accordingly, an object of the present invention is to provide a multifunctional measurement apparatus having various measurement functions simultaneously by using an application specific integrated circuit.

In addition, another object of the present invention is to provide a multi-function measurement device that is easy to carry using an ASIC and a multi-controller.

1 is a front view showing the appearance of a multi-function measuring apparatus according to the present invention.

FIG. 2 is a block diagram illustrating the internal configuration of FIG. 1. FIG.

Figure 3 is a screen showing the output state of performing a digital multimeter function for measuring the voltage value of the present invention.

4 is a screen diagram showing an output state of performing a digital multimeter function for measuring minimum, maximum and average values of the present invention.

5 is a view showing an output screen state in accordance with the oscilloscope function of the present invention.

6 is a view showing an output screen state according to the frequency counter function of the present invention.

7 is a view showing an output screen state in accordance with the frequency generator function of the present invention.

8 is a view showing an output screen state according to the help key input of the present invention.

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

100: function selection dial 110: key selection

130 display unit 140 input / output terminal unit

210: input unit 220: function selection unit

300: signal conversion unit 400: data processing unit

410: control unit 420: storage unit

430 display unit

The present invention for achieving the above object is a function selection unit for selecting at least one of a plurality of measurement functions, a first signal converter for converting the signal of the external input signal to perform the selected digital multimeter function, oscilloscope and A second signal converter for converting an external input signal to perform a logic analyzer function, a third signal converter for converting an external input signal to perform a frequency counter function, and a signal converter for performing a frequency generator function A fourth signal converter configured to perform data processing of signals output from the first to fourth signal converters, and output a measurement signal according to an output form of the selected measurement function, according to a measurement signal output from the data processor Display unit for displaying a plurality of measured values, for controlling the data processing unit It is a feature of the present invention to provide a multi-function measuring apparatus including a control unit.

Hereinafter, with reference to the accompanying drawings, a preferred embodiment of the multi-function measuring apparatus according to the present invention will be described in detail. However, the present invention is not limited or limited by the following examples.

1 is a front view showing the appearance of a multi-function measuring apparatus according to the present invention, Figure 2 is a block diagram of the internal configuration of FIG.

As shown in Figure 1, the multi-function measuring device of the present invention is a voltage selection, current check, frequency generator, frequency counter component check, power off (OFF), function setup of the measurement device, function selection dial for switching the buzzer function ( 100) is formed in the central part of the front face.

In addition, a key selection unit 110 for main function selection, first sub function selection, and usage help is configured in an upper region of the function selection dial 100, and is provided in the function selection dial 100 and the key selection unit 110. The display unit 130 for displaying the size and shape of the signal according to the performance of each function is formed on the upper front of the measurement device.

In addition, an input / output terminal unit 140 for receiving a signal to be measured of various communication devices or outputting a generated frequency signal is disposed under the front side of the measuring device.

Here, the key selector 110 includes a scope key 111 for selecting an oscilloscope and a digital multimeter function, a logic key 112 for selecting a logic analog function, and an AC / DC key 113 for selecting a DC and AC power supply. And a range key 114 for selecting a measurement range according to various functions. In addition, the key selector 110 may include first to fourth sub function selection keys 115, 116, 117 and 118 for selecting a first sub function according to a main function selected according to a key input, and a plurality of second subs included in the first sub function. Cursor key 119 for function selection is included.

In addition, the key selector 110 may include a storage key 120 for storing measured signal values and the like, a help key 121 for selecting help of a measurement device, and measured signal values. And a hold key 122 for holding.

At this time, it is apparent that the multi-function measuring apparatus according to the present invention has an interface for connecting to a communication terminal such as a computer and a power supply connector on a certain side.

The internal configuration circuit according to the present invention configured as described above will be described with reference to the accompanying drawings.

Referring to FIG. 2, the multi-function measuring apparatus according to the present invention includes an input unit 210 for receiving a signal input from various devices, a measurement type of the input signal, that is, a function selection unit 220 for selecting a function, and a function selection. And a signal converter 300 for digital distribution and signal distribution for adjusting the appropriate signal size and shape.

In addition, the multi-function measuring apparatus outputs a data processing unit 400 for data processing the signal output from the signal conversion unit 300 according to a selected function, and a control signal for controlling the overall operation of each unit through the data processing unit 400. The control unit 410 is included.

In addition, the multi-function measuring apparatus according to the present invention displays the storage unit 420 for storing the signal output from the data processing unit 400 or outputting the stored signals and the signal value and waveform according to the selection of each function according to each function It is configured to include a display unit 430 for.

Here, the signal converter 300 may perform signal conversion based on a first signal converter 310, an oscilloscope, and a logic analyzer function to perform signal conversion according to the digital multimeter function selected through the function selector 220. Further comprising a second signal converter 320, a third signal converter 330 for performing a signal conversion according to the frequency counter function and a fourth signal converter 340 for performing a signal conversion according to the frequency generator function It is composed.

At this time, the first signal converter 310 is a divider 312 for adjusting the size and waveform of the input signal in an appropriate form to perform the digital multimeter function, various forms of adjusting the size and waveform, that is, voltage, current, The data converter 314 converts a signal such as a resistor into a constant analog value, and the A / D converter 316 digitally converts the constant analog signal to the data processor 400.

In addition, the second signal converter 320 may include a signal amplifier 322 and an A / D converter 324 for performing frequency value reading to draw an input signal waveform, and an input signal with an appropriate size and A divider 326 for adjusting the waveform, an amplifier 328 for amplifying the output signal of the divider 326, and a divider 329 for adjusting the magnitude and waveform of the signal by receiving the signal of the amplifier 328. It is configured by.

In addition, the third signal converter 330 may include a divider 332 for appropriately adjusting the size and waveform of an input signal, an OP amplifier 334 for amplifying a signal output from the divider 332, and an OP amplifier ( And a coding unit 336 for encoding a signal output from 334 to binary-coded decimal (BCD). In this case, the encoding unit 336 may be configured as an ASIC device manufactured for BCD encoding.

In addition, the fourth signal converter 340 is a control signal output through the signal generator 342 and the data processor 400 for generating a signal of a waveform output through the data processor 400 according to the frequency generator function selection. In accordance with the configuration, and includes an OP amplifier 344 for amplifying the signal output from the signal generator 342.

Here, the data processor 400 may be configured as an ASIC device capable of processing the input data signal according to various functions selected by the function selector 220.

In addition, it is apparent that the controller 410 may be configured as a multi controller capable of outputting a plurality of control signals for controlling the data processor 400 according to various selected measurement functions.

Referring to the operation of the multi-function measuring apparatus according to the present invention configured and operated as follows.

First, a user connects a device or device to be measured to the input / output terminal 140 of FIG. 1, and selects a scope key 111 to select a digital multimeter or an oscilloscope function, and the scope key 111 is selected once. Press to select the digital multimeter function and press again to configure the oscilloscope function. At this time, it is obvious that the selection order of the multimeter or oscilloscope function selected by the operation of pressing the scope key 111 may be changed.

When the digital multimeter function is selected by the user pressing the scope key 111, that is, the device or device is selected by the function selection unit 220 of FIG. 2, and is input through the input unit 210. The input signal of is applied to the data processor 400 through the divider 312, the data converter 314 and the A / D converter 316, and then the data processor 400 outputs the applied input signal to the controller 410. do.

The controller 410 compares a signal input from the data processor 400 with a value larger or smaller than a preset value, outputs a measurement range control signal according to the comparison to the data processor 400, and outputs a data processor ( 400 outputs a measurement range control signal input from the controller 410 to the distributor 312.

The divider 312 sets the optimum measurement range according to the measurement range control signal, adjusts the size and shape of the input signal accordingly, and outputs the signal to the data converter 314. In this case, the measurement range may be automatically set according to the input signal.

The data converter 314 receives a signal output from the divider 312 and converts the signal into an analog signal of a certain type, and outputs the converted signal. The A / D converter 316 receives an analog signal and converts the digital signal into a data processing unit ( 400).

The data processor 400 receives a digital signal output from the A / D converter 316 and outputs it to the controller 410, and the controller 410 receives a signal from the data processor 400 and performs data processing every 250 ms. The control signal for outputting to the data processing unit 400.

The data processor 400 performs data processing according to the control signal of the controller 410 and displays the signal data value according to the multimeter function on the display unit 430.

In this case, the controller 410 may store the signal data value selectively processed by pressing the storage key 120 of FIG. 1 by the user in the storage unit 420.

Here, the screen state displayed on the display unit 430 is as shown in FIG. 3.

3 is a screen diagram illustrating an output state of performing a digital multimeter function for measuring a voltage value of the present invention.

Referring to FIG. 3, the frequency 500 of the measured signal, the measured voltage value 502, the analog value 504, the previous measured voltage value 506, the decibel (dB) value 508, and the decibel reference value 510. ), The temperature 512, the usage time 514, the automatic power off remaining time 516, and the sub selection menu 518 by the first to fourth sub function selection keys 115, 116, 117 and 118 of FIG. 1. 430 is displayed.

4 is a screen illustrating an output state of performing a digital multimeter function for measuring minimum, maximum and average values of the present invention.

Referring to FIG. 4, the frequency 519 of the measured signal, the measured voltage value 520, the maximum voltage value, the average value, the minimum value, and the bar graph 521 of the input signal are displayed on the display unit 430. In this case, the bar graph 521 allows the user to see the changed state of the measured signal.

Here, the time can be recorded every time the value of the measured signal voltage maximum, minimum, average, etc. changes, and the data can be adjusted at a time interval of 250 ms to 2 s.

In addition, a submenu for selecting a submenu function according to the digital multimeter function is displayed in the lower area of the display unit 430.

On the other hand, when the user presses the scope key 111 of FIG. 1 again, the set digital multimeter function is reset to the oscilloscope function.

When the oscilloscope function selection signal is input by the scope key 111, the oscilloscope function is selected by the function selection unit 220 of FIG. 2, and the signal input through the input output terminal unit 140 is the second data conversion unit 320. Is entered into the distributor 326.

The divider 326 divides the input signal into 175 mV, 1.75 V, 17.5 V, 175 V, 700 V, and the like, and outputs the amplifier 328. do.

The divider 329 receives the signal output from the amplifier 328 and sets one of 1: 1, 1: 2, and 1: 5 to draw the maximum waveform on the grid, and then outputs the signal to the data processor 400.

The data processor 400 receives the digital signal from the divider 329 by the control signal of the controller 410, digitally converts the signal, and stores the digitally converted signal in the storage unit 420 and sequentially outputs the signal to the display unit 430. Display the output waveforms. At this time, the voltage displayed on the display unit 430 is the maximum value of the waveform.

In addition, the flow of a signal input through the input / output terminal unit 140 is sequentially made up of the divider 326, the amplifier 328, the divider 329, the data processor 400, the storage unit 420, and the display unit 430. The frequency signal inputted at the same time is amplified by the signal amplifier 322 to a predetermined level, and the A / D converter 324 digitally converts and outputs the amplified frequency signal to a predetermined level.

The data processor 400 receives the frequency signal output from the A / D converter 324, reads the frequency signal data value under the control of the controller 410, and then displays the signal data value having the frequency. Display via

Here, the screen output through the display unit 430 according to the oscilloscope function is as shown in FIG.

5 is a view showing an output screen state according to the oscilloscope function of the present invention.

As shown in FIG. 5, the waveform 530, the adjustment voltage 532, the frequency 534, the trigger level 536, and the input effective voltage value 538 of the input signal are displayed on the display unit 430. Is displayed.

In this case, a submenu for selecting a sub function is displayed in the lower area of the screen displayed on the display unit 430.

Meanwhile, when the user inputs the frequency counter function selection signal by adjusting the function selection dial 100 of FIG. 1, the frequency counter function is selected by the function selection unit 220 of FIG. 2.

When the input frequency signal is input through the input output terminal unit 140, the divider 332 divides the frequency into the lowest level, and the OP amplifier 334 distributes the frequency signal distributed in the lowest level to a predetermined level. Output

The coding unit 336 BCD-codes the amplified frequency signal output from the OP amplifier 334 and outputs the BCD-coded signal to the data processing unit 400. The data processing unit 400 divides the signal according to the magnitude of the BCD-coded frequency signal. And a signal for optimal frequency counting to the encoding unit 336.

Through the above-described process, the frequency signal according to the optimal frequency counting state is output through the display unit 430.

In this case, the screen state displayed through the display unit 430 is as shown in FIG. 6.

Figure 6 shows the output screen state according to the frequency counter function of the present invention, the current frequency 600, the time 602, the previous frequency 604, the previous frequency time 606, the previous number of revolutions of the counted signal The RPM 608, the gate time 610, the reduction rate 612, the usage time 614, the temperature 616, the shutdown time 618, the channel 620, and the like are displayed on the display unit 430. The sub selection menus are displayed by the first to fourth sub menu selection keys 115, 116, 117 and 118.

Meanwhile, when the user inputs the frequency generator function selection signal by adjusting the function selection dial 100 of FIG. 1, the frequency generator function is selected by the function selection unit 220 of FIG. 2.

When the frequency generator function selection signal is input by the function selection unit 220, the data processing unit 400 outputs the frequency generation signal to the signal generation unit 342, and the signal generation unit 342 generates the frequency by the frequency generation signal. The magnitude of is adjusted to generate a signal having a frequency corresponding thereto, and the generated frequency signal is amplified to a predetermined level in the OP amplifier 344 and output through the input / output terminal unit 140 of FIG.

In addition, the generated frequency signal amplified by the OP amplifier 344 is output to the data processor 400 through the A / D converter 324 via the signal amplifier 322 of the data converter 320. The data processor 400 displays the frequency value generated under the control of the controller 410 through the display unit 430.

Here, the display screen of the display unit 430 according to the frequency generation is as shown in FIG.

7 is a view showing the output screen state according to the frequency generator function of the present invention, the display unit 430, the generated frequency 700, the duty (702), the output frequency amplifier 704, the output waveform form 706, temperature 708, measurement time 710 and auto power off residence time 712 are displayed. In addition, a sub-selection menu 714 according to the frequency generator function is displayed in the lower area of the display unit 430.

Meanwhile, when a user inputs a logic analyzer function selection signal by pressing the logic key 112 of FIG. 1, the logic analyzer function is selected by the function selection unit 220 of FIG. 2.

The logic analyzer function is performed through the same internal configuration circuit as the oscilloscope function performed by the second data converter 320, the data processor 400, the controller 410, and the display unit 430.

In addition, as shown in FIG. 8 by the user pressing the help key 121 of FIG. 1, a description of the use of the multi-function measuring instrument is displayed on the display unit 430.

The multi-function measuring apparatus according to the present invention configured and operated as described above is performed separately from the digital multimeter, the oscilloscope, the frequency counter, the frequency generator, and the logic analyzer, so that any other function may be deleted or excluded. Does not affect

The multifunction measurement apparatus according to the present invention performs various functions such as a digital multimeter, a digital storage oscilloscope, a frequency generator, a frequency counter, a logic analyzer, and the like using an application specific integrated circuit, that is, an ASIC device.

Therefore, the present invention can perform various functions by the function selection key and the function selection dial installed on the front of the multifunction instrument, so that the size or shape of the signal generated from the electric, electronic and communication devices can be easily displayed or analyzed. Can be.

Although the above has been described with reference to the preferred embodiments of the present invention, those skilled in the art may vary the present invention without departing from the spirit and scope of the present invention as set forth in the claims below. It will be appreciated that modifications and variations can be made.

Claims (13)

Function selection means for selecting at least one of a plurality of measurement functions and inputting a request signal according thereto; Signal conversion means for performing digital distribution or distribution of signals input from the outside according to the selected measurement function; Data processing means for data processing the output of the signal conversion means in accordance with the output of the function selection means; Display means for displaying the data processed signal value in an output pattern according to the selected function; Control means for controlling the data processor Multifunction measuring device comprising a. The method of claim 1, The signal conversion means A first signal converter for converting an external input signal according to a digital multimeter performance request signal input through the function selecting means; A second signal converter for converting an external input signal according to an oscilloscope and a logic analyzer execution request signal inputted through the function selecting means; A third signal converter which converts an external input signal according to a frequency counter performance request signal input through the function selecting means; According to the frequency generator performance request signal input through the function selection means And a fourth signal converter configured to convert a signal for performing a frequency generator function by the external input signal. The method of claim 2, The first conversion unit A divider configured to adjust a magnitude and a waveform of the external input signal in a form for performing a multimeter function; A data converter for converting the signal whose amplitude and waveform is adjusted into a constant analog value; And an A / D converter for digitally converting the analog converted signal and outputting the digital signal to the data processor. The method of claim 2, The second signal converter A signal amplifier for amplifying the external input signal to a predetermined level; An A / D converter for reading a frequency value for drawing a waveform of the amplified signal; A first divider for adjusting the external input signal to an appropriate magnitude and waveform; An amplifier for amplifying the output signal of the first divider; And a second divider for adjusting the size and shape of the output signal of the amplifier. The method of claim 2, The third signal converter A divider for adjusting the size and shape of the external input signal; An OP amplifier for amplifying the signal output from the distributor; And a coding unit for BCD coding the OP amplifier output signal. The method of claim 2, The fourth signal converter A signal generator for generating a waveform signal corresponding to a signal output through the data processor by selecting a frequency generator function of the function selector; And a OP amplifier for amplifying the generated waveform signal to a predetermined level by the control of the data processor. The method of claim 1, And the data processing unit comprises a general-purpose device for data processing the external input signal in accordance with a plurality of measurement functions. The method of claim 1, And the plurality of measurement functions comprise at least one of a digital multimeter, an oscilloscope, a frequency counter, a frequency generator, or a logic analyzer. The method according to claim 1 and 8, The display unit measures the measured frequency, measured voltage value, analog value, previous measured voltage value, decibel value, decibel reference value, temperature, usage time, auto power off remaining time and sub of the input signal according to the selected digital multimeter measurement function. Multi-function measuring device displaying the function selection menu. The method according to claim 1 and 8, And the display unit displays a waveform, an adjustment voltage, a frequency, a trigger level, and an input effective voltage value of the external input signal according to the selected oscilloscope measurement function. The method of claim 1 and 8. The display unit displays a current frequency, a time, a previous frequency, a previous rotation speed, a gate time, a reduction rate, a use time, a temperature, a power cut-off time, a channel and a sub function selection menu of the external input signal according to the selected frequency counter function. Multifunctional measuring device. The method according to claim 1 and 8, The display unit displays a frequency, duty, output frequency amplifier, output waveform shape, temperature, measurement time, automatic power off remaining time and sub function selection menu of the waveform signal generated according to the frequency generator function selection. The method of claim 1, The display unit is a multi-function measuring device for displaying the instructions for use and reading the measurement signal value according to the function selection.