KR101011512B1 - Device and method for measuring unit water content - Google Patents

Abstract

The present invention relates to a unit quantity measuring device and a measuring method.

The unit quantity measuring device according to the present invention includes a detection vessel for receiving a measurement object in a state in which a terminal portion including a first terminal and a second terminal disposed to face each other therein is coupled, a detection vessel is coupled, and The first electrode is connected to the first terminal to input a forward harmonic signal, the harmonic signal passes through the object to be measured and outputs a forward attenuation signal reaching the second terminal through the second electrode, and the second electrode is connected to the second electrode. Connected to the terminal to input a harmonic signal in the reverse direction, and the harmonic signal is transmitted through the object to be measured and outputs the reverse attenuation signal reaching the first terminal through the first electrode, thereby electrically measuring the forward attenuation signal and the reverse attenuation signal. A detection body including a unit quantity measuring circuit for outputting a value as a positive signal and a negative signal, respectively, and an arithmetic unit for calculating an average value of the sum of the absolute values of the positive and negative signals; And a display unit for receiving and displaying an absolute value of the positive signal and the negative signal of the detection body and an average value of the sum thereof, and a printer for outputting the display value of the display unit.

Concrete, fine aggregate, unit quantity, capacitance, detection vessel

Description

Unit quantity measuring device and measuring method {DEVICE AND METHOD FOR MEASURING UNIT WATER CONTENT}

The present invention relates to a unit quantity measuring apparatus and a measuring method, and more particularly, to a unit quantity measuring apparatus and a measuring method using a capacitance method.

In general, concrete is a combination of chemically inert aggregate with cement paste (Cement Pasts, Portland Cement + Water) mixed with water. When cement is mixed, cement paste fills the gap between aggregates and hydrates between the mixed cement and water, and shows strong adhesive strength with aggregate.

The basic materials constituting the concrete are cement, aggregate, and water. In addition, mixed materials are used to improve fluidity, condensation rate, or freeze-thawing resistance, and the amount of water in the concrete is called unit quantity.

In addition, there are methods for measuring the quantity of water present in the concrete, such as the capacitance method, the air volume method, the drying method, and the reagent concentration difference method. Some conventional methods, such as methods estimated from physical quantities in which there is some correlation with quantity, are proposed. It is applied to actual construction.

In addition, the relationship between the concrete unit quantity and the water cement ratio is as follows.

At this time, the unit water amount is inde concrete units suitable as showing the amount of water units are kg, the volume of blended concrete 1m ³ PO (40kg) and the weight of the formulation by weight per kg (ton) of concrete per 1m ^3. That is to indicate whether a few kg of water used in the material for concrete 1m ³ water cement ratio is used as a% of water by weight percent of the cement in the concrete with the cement paste.

For reference, the water cement ratio of general concrete is set at 60% or less in the revised specification from 65% or less, and these regulations stipulate the amount in consideration of the convenience of construction when placing concrete.

In other words, the amount of water required for the hydration of concrete is 25% of the number of bonds, 15% of the number of gels, and about 40% in total.In reality, the main properties of raw concrete are consistency, pumpability, and finishability. In order to secure mobility, workabilit, etc., the quantity of water used is increased as surplus water. Since the volume corresponding to this surplus water remains as harmful voids in concrete, it is important to use as few units as possible.

Therefore, the important meaning of the unit quantity is that the amount of other materials is given when the amount of water per 1m 3 volume increases. Thus, as the amount of water increases, the slump increases and the strength decreases.

Table 1 below shows the effect of the amount of concrete unit cement.

That is, referring to Table 1 mainly shows the occurrence of cracks due to the adverse effects of excessive use of cement.

In addition, among the elements necessary to produce good concrete, the basic element is to use the quantity of unit, the amount of cement, and the aggregate as little as possible within the range that the required strength and proper workability are secured.

In addition, the reinforced concrete exhibits its function by the compressive strength of coarse aggregates + the bond strength of the binding material (the fine aggregate + cement + water) + the tensile strength of the reinforcing material (such as reinforcing steel or fiber reinforcing material). That is, the quality depends on the degree of compounding, which is determined by the binder.

In conclusion, the smaller the proportion of binder in the unit volume of concrete is, the better, and in order to manufacture high-durability concrete, high-grain cement and high-intensity aggregate are the most important. Do.

As a measuring device for measuring the unit quantity, the container part which can hold the cement paste, the measuring part, the display part which displays the measured value, etc. are integrally formed, and the manufacturing process is complicated and the scale becomes large. .

In addition, the measuring equipment had a difficulty in moving due to the large scale, which causes a problem in that field measurement is difficult when measuring by moving several sites.

In addition, it is difficult to repair due to failure or abnormality due to the integrated structure, and even if repaired, there is a problem in that the cost of repair time and repair is increased through disassembly and assembly as a whole.

Therefore, the weight is reduced and the volume is reduced to facilitate the field measurement, and it is manufactured in a manner that is separated and manufactured by function and use for easy maintenance, and is easy to maintain and manage while improving the quantity of unit. The measuring equipment is urgently needed.

In addition, in measuring the unit quantity, a method using a dielectric constant or capacitance of a single high frequency is used, but according to this method, the surface yield of mortar and fine aggregate can be measured, but when measuring the unit quantity of coarse aggregate of concrete There was a problem that a measurement error occurs. For this reason, the coarse aggregate has the inconvenience of filtering and measuring, and also has a problem that takes a long time to measure.

Accordingly, the present invention has been made in view of the problems of the prior art as described above, by measuring the unit quantity of concrete using harmonics modulated with high frequencies at low frequencies, saving measurement time and reducing the cost of measurement. It is an object of the present invention to provide a measuring apparatus and a measuring method capable of measuring the quantity of units effectively and accurately.

It is also an object of the present invention to provide a measuring apparatus and a measuring method capable of measuring the unit quantity of concrete without removing the coarse aggregate.

In addition, an object of the present invention is to provide a measuring device and a measuring method for simplifying portability by reducing the size and light weight by embedding a unit quantity measuring circuit in the detection container.

A detection vessel for receiving an object to be measured in a state in which a terminal portion including a first terminal and a second terminal disposed to face each other therein is coupled, a detection vessel is coupled, and a first electrode is connected to the first terminal in a forward direction. Inputs a harmonic signal of the signal, outputs the forward attenuation signal transmitted through the object to be measured and reaches the second terminal through the second electrode, and connects the second electrode to the second terminal to input a reverse harmonic signal. The harmonic signal penetrates the object to be measured and reaches the first terminal, and outputs the reverse attenuation signal through the first electrode. The electrical measured values of the forward attenuation signal and the reverse attenuation signal are positive and negative, respectively. A detection body including a unit quantity measuring circuit for outputting a signal, and a calculation unit for calculating an average value of the sum of absolute values of a positive signal and a negative signal, a positive signal of a detection body, and a negative signal And a display unit for receiving and displaying an absolute value and an average value of the sum thereof, and a printer for outputting display values of the display unit. The unit quantity measurement circuit includes a frequency modulator for generating harmonics at which high frequency is modulated and a harmonic signal. A frequency divider for forward and reverse distribution, a first filter and a first buffer are connected in series to one end of the frequency divider to input a forward harmonic signal to the first electrode, and to the second electrode to the second buffer and the fourth filter, and 1 Forward measuring unit and frequency divider which connects the first input terminal of the signal amplifier in series and transfers the forward attenuation signal transmitted from the first electrode to the second electrode to the first input terminal of the first signal amplifier to amplify and output the positive signal. A third filter and a third buffer are connected in series at the other end of the second harmonic signal to the second electrode, and the second buffer and the first electrode are connected to the first electrode. 2 A reverse measurement that connects the filter and the second input terminal of the first signal amplifier in series, transfers the reverse attenuation signal transmitted from the second electrode to the first electrode to the second input terminal of the first signal amplifier, and amplifies and outputs the negative signal. And a biode detector for detecting only low frequencies of the amplified positive and negative signals, and a converter for converting the detected low frequencies into a digital signal.

The unit quantity measuring circuit further includes a controller for controlling the polarity of the forward and reverse directions, the number of times the average value is calculated, and the range of harmonics.

The unit quantity measuring circuit further includes second to fourth signal amplifiers connected in series between the frequency modulator and the frequency divider to amplify the harmonic signals to a predetermined magnitude.

The unit quantity measuring circuit further includes a signal controller connected to the fourth signal amplifier to adjust a range of signals of the first electrode and the second electrode according to the distance from the ground and the intensity of disturbance.

The unit quantity measuring circuit further includes a biode controller connected to the biode detector to adjust a low frequency input and output ratio.

The unit quantity measuring circuit further includes a converter for converting the detected low frequency into a digital signal.

The unit quantity measuring method is a unit quantity measuring method using a unit quantity measuring device, a frequency modulation step of generating a harmonic signal in which low frequencies are modulated at a high frequency, a frequency distribution step of distributing harmonic signals in a forward and a reverse direction, and a harmonic signal in a forward direction To the first electrode, forward attenuating signal transmitted from the first electrode to the second electrode to the first input terminal of the first signal amplifier to amplify and output a positive signal, the forward harmonic signal of the reverse direction A reverse measurement step of inputting the second electrode and transmitting the reverse attenuation signal transmitted from the second electrode to the first electrode to the second input terminal of the first signal amplifier and amplifying the negative signal to output the negative signal; A detection step of detecting only low frequencies among negative signals, and calculating an average value of the sum of absolute values of the detected positive signals and negative signals. Calculating step, a display step of displaying by receiving the amount of the average value of the absolute value and the sum of the signals of the signal and the negative, and an output step of outputting the value displayed in the display step.

The unit quantity measuring method includes a setting step of inputting the number of times the average value is calculated before the frequency modulation step and a range of harmonics, and after the calculating step, if the number of times the average value is not reached, the method returns to the forward measurement step. Go back and perform that step.

As described above, the unit quantity measuring apparatus according to the present invention can measure the unit quantity of concrete using harmonics modulated with high frequency to low frequency, thereby reducing the time required for the measurement by saving the measurement time, Effective and accurate unit quantity can be measured.

In addition, according to the present invention, the unit quantity of concrete can be measured without removing the coarse aggregate.

Further, according to the present invention, by incorporating a unit quantity measuring circuit into the detection container, the size can be reduced and the weight can be reduced, thereby making it easy to carry.

BRIEF DESCRIPTION OF THE DRAWINGS The above and other features and advantages of the present invention will be more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which: FIG.

1 is an exploded perspective view showing the configuration of a unit quantity measuring apparatus according to the present invention, Figure 2 is an exploded perspective view of the terminal portion and the detection container according to the invention, Figure 3 is an exploded perspective view and a combined perspective view of the detection body according to the present invention 4 is a rear perspective view of the signal transfer plate of the detection body according to the present invention, FIG. 5 is a circuit diagram showing the configuration of a unit quantity measurement circuit of the detection body according to the present invention, and FIG. 6 is a unit quantity measurement according to the present invention. A waveform diagram showing harmonics of a frequency modulator of a circuit.

As shown in FIG. 1, the unit quantity measuring apparatus 100 according to the present invention includes a detection container 20, a detection body 30 including a unit quantity measuring circuit and a calculation unit, a display unit 40, and a printer ( 50).

The detection vessel 20 accommodates the object to be measured in a state in which the terminal portion 10 including the first terminal 11 and the second terminal 12 disposed to face each other inside thereof is coupled. At this time, the object to be measured in the unit quantity measuring device according to the present invention targets concrete, mortar, fine aggregates and the like.

The detection body 30 has a detection vessel 20 coupled thereto, and a first electrode (not shown) is connected to the first terminal 11 to input a forward harmonic signal, and the harmonic signal penetrates the object to be measured. The forward attenuation signal reaching the second terminal 12 is output through a second electrode (not shown), and the second electrode (not shown) is connected to the second terminal 12 to input a harmonic signal in a reverse direction. The harmonic signal penetrates the object to be measured and outputs a reverse attenuation signal that reaches the first terminal 11 through a first electrode (not shown), so that an electrical measurement value of the forward attenuation signal and the reverse attenuation signal is positive. It includes a unit quantity measuring circuit (not shown, see Figure 5) for outputting a signal and a negative signal. In addition, the detection body 30 includes an operation unit (not shown) that calculates an average value of the sum of the absolute values of the positive signal and the negative signal.

The display unit 40 receives and displays an absolute value of the positive signal and the negative signal of the detection body 30 and an average value of the sum thereof.

The printer 50 outputs the display value of the display unit 40.

As shown in FIG. 2, the terminal unit 10 generates a signal and is exposed to the outside to receive the generated signal from the first terminal 11 having the first terminal surface 11a for connection to detect a measured value. The non-ferrous metal is composed of a second terminal 12 having a second terminal surface 12a for connection and a second terminal 13 having a second terminal surface 13e. The first terminal and the second terminal are the connection terminals to be measured, and the moisture content is tested through the connection terminal whose electrical resistance is close to '0' in a constant container in order to test the workpiece of the raw concrete.

In this way, the receiving space 22 of the detection vessel 20 in which the terminal portion 10 is installed contains a measurement object such as concrete, mortar, fine aggregate, etc., and is formed of a transparent material projected inside such as acrylic to contain the measurement object. When it is lost, it is possible to check the air bubbles inside with the naked eye so that it can be easily removed.

As shown in Figure 3 and 4, the detection body 30 is coupled to the detection body 30 is configured.

Here, the detection body 30 is positioned on the floor so that the coupling space 31 can be formed, and receives power from a power supply device (not shown) required for measuring capacitance, and is installed therein for supply. A bottom plate 33 provided with a terminal 33a connected to the unit quantity measuring circuit is formed.

Then, the insertion groove 34a coupled to the terminal 33a of the bottom plate 33 and to which the transmission terminal surface 11a of the transmission terminal 11 and the detection terminal surface 12a of the detection terminal 12 are coupled. A terminal groove 34b having a terminal 33a coupled thereto is formed at a lower portion thereof, and a unit quantity measuring circuit installed therein for supplying power and signal transmission is installed, and a transparent protective cover 34c that prevents breakage and foreign matter penetration. ) Is coupled to the signal transmission plate 34.

That is, the transmission terminal surface 11a and the detection terminal surface 12a inserted into the insertion groove 34a are connected to the unit quantity measuring circuit to receive power, and the terminal 33a is inserted into the terminal groove 34b to provide the unit. The electric power supplied to the bottom plate 33 is transferred to the signal transmission plate 34 by being connected to the quantity measuring circuit.

In addition, in front of the signal transmission plate 34, a transparent protective cover 34c, which is openable and closed, is coupled to a hinge end 34d having a hinge hole 34d 'and rotates in the vertical direction to prevent damage to the connector 32. It is installed to prevent foreign matter from entering.

The protective cover 34c is constituted by a hinge end 34c 'having hinge holes 34c " formed at both ends thereof so that the hinge end 34d can be inserted therein.

In addition, the hinge end 34c 'and the hinge end 34d of the protective cover 34c are coupled to the hinge shaft 34e through the hinge hole 34c "and the hinge hole 34d' in order to be coupled and rotated. do.

Next, the signal transmission plate 34 is spaced to an upper portion of the bottom plate 33 to which the signal transmission plate 34 is coupled to form a coupling space 31 in which rear and both sides are open to insert the detection container 20. The cover plate 35 is fixed to the top of the configuration.

At this time, the cover plate 35 serves as a cover to prevent the measurement object contained in the detection vessel 20 to flow over by shaking.

In addition, the detection body 30 including the bottom plate 33, the signal transmission plate 34, and the cover plate 35 is formed of an insulating material in which electricity is not energized, so that the object to be measured and the cover plate 35 contact each other. Even if it does not respond to the current applied to measure the capacitance.

On the other hand, the detection vessel 20 that contains the object to be measured is coupled to the display unit 40 that receives the signal from the calculation unit (not shown) of the detection body 30 for measuring and calculating the capacitance and displays the result value signal It is connected to the connector 32 of the transfer plate 34.

The display unit 40 has an LCD screen 41 for digitally displaying a result value. The display unit 40 includes a keypad 42 for inputting numerical values and controlling current. Connector port 43 connected to the connector 32, the printer port 44 connected to the printer 50, the power jack 45 for charging and supplying the display unit 40.

And the printer 50 which outputs the result of the display part 40 is comprised.

As shown in FIG. 5, the unit quantity measuring circuit of the unit quantity measuring apparatus according to the present invention includes a frequency modulator 100, a frequency divider 200, a forward measuring unit 300a, a reverse measuring unit 310a, and a bio De detector 500, converter (not shown).

The frequency modulator 100 generates harmonics in which a low frequency (1 KHz) is modulated at a high frequency (50 MHz). Pure low frequency (1KHz) alone can overtake fine aggregates and coarse aggregates, so that the signal cannot reach the electrodes and can be reflected by coarse aggregates (less than 25u / m), rather disturbing the measurement. Therefore, by modulating the low frequency at high frequency and acting as a carrier to allow the low frequency to reach the opposite electrode, the signal reached to the plate reaches a relatively accurate test value, although somewhat different depending on the component of the object to be measured. In addition, the signal ratio modulated in consideration of the component to be measured, the electrode area, and the electrode distance in the modulation process is considered. 6, the frequency modulator 100 of the unit quantity measuring device according to the present invention synthesizes, ie, modulates, a low frequency of 1 KHz having a period of 1 ms and a high frequency of 50 MHz having a period of 20 ns, thereby modulating a period of 1 ms. By forming the phosphorus harmonics (ie, modulated waves), the unit quantity of the measured object such as raw concrete and mortar including aggregate can be measured more accurately within a short time.

The frequency divider 200 distributes harmonic signals in the forward and reverse directions. In the 1st and 2nd test, the signal is distributed in the forward and reverse directions, and the signal regulator acts so that the signal is not attenuated during the distribution.

The forward measuring unit 300a connects the first filter 210a and the first buffer 220a in series to one end of the frequency divider 200, and inputs a forward harmonic signal to the first electrode JIG +, and the second The second buffer 220d and the fourth filter 210d and the first input terminal 300b of the first signal amplifier 400 are connected to the electrode JIG− in series to connect the second electrode JIG to the second electrode JIG + from the first electrode JIG +. The forward attenuated signal transmitted through-) is transmitted to the first input terminal 300b of the first signal amplifier 400 to be amplified and output as a positive signal.

The reverse measurement unit 310a connects the third filter 210c and the third buffer 220c in series with the other end of the frequency divider 200 to input a reverse harmonic signal to the second electrode JIG−, and The second buffer 220b and the second filter 210b and the second input terminal 310b of the first signal amplifier 400 are connected to the first electrode JIG + in series to connect the first electrode (JIG +) to the first electrode (JIG +). The reverse attenuation signal transmitted to the JIG +) is transferred to the second input terminal 310b of the first signal amplifier 400 to be amplified and output as a negative signal. And second to fourth signal amplifiers 110, 120, and 140 connected in series between the frequency modulator 100 and the frequency divider 200 to amplify the harmonic signals to a predetermined magnitude. A signal controller 150 is further connected to the fourth signal amplifier 140 and adjusts a range of signals of the first electrode JIG + and the second electrode JIG- according to the distance from the ground and the intensity of disturbance. Include. Here, the fifth buffer 230 is connected between the signal controller 150 and the ground electrode N, so that the first electrode JIG + and the second electrode JIG− according to the distance from the ground and the intensity of disturbance. The error rate can be minimized by automatically adjusting the signal range.

On the other hand, the first to fourth buffers 220a to 220d have an electrical signal (50 MHz + 1 KHz), and when the moisture content of the raw concrete is tested, the first positive direction (+,-) and the second reverse direction (-, +) Reverse the polarity of the signal so that it can be delivered. In addition, the first to fourth filters 210a to 210d have a function of dissipating a frequency above a carrier (50 MHz) and a frequency below a signal (1 KHz), so that the frequency components other than the carrier and the signal are different. This can be minimized to minimize test errors. In addition, the first signal amplifier 400 amplifies and converts the electrical measurement value of the object to be measured contained in the electrode into a positive / negative signal and outputs it. That is, in the first forward test, the potential difference between the first electrode JIG + and the second electrode JIG- is detected, and the detected signal is amplified by 101 times and output as a positive signal. In the second reverse test, the potential difference between the second electrode JIG- and the first electrode JIG + is detected, and the detected signal is amplified 101 times and output as a negative signal. The second to fourth signal amplifiers 110, 120, and 140 amplify the signal modulated by the wideband high frequency signal amplifier to a predetermined magnitude (10 dB).

The biode detector 500 detects only low frequencies among the amplified positive and negative signals. That is, the modulated attenuated signal passing through the measured object destroys the carrier signal and filters only the pure low frequency. For example, 50 MHz is extinguished, 1 KHz is detected, and the detected low frequency is amplified to a constant magnitude (10 dB) and transmitted to the rear stage. In this case, the biode detector 500 further includes a biode controller 520 that is connected to the biode detector 500 and adjusts a low frequency input and output ratio. At this time, the control signal is about DC 0 ~ 10V.

A converter (not shown) converts the detected low frequency into a digital signal.

The controller (not shown) controls the overall operation of the unit quantity measuring circuit, and in particular, controls the polarity of the forward and reverse directions, the number of times the average value is calculated, and the range of harmonics.

Therefore, the unit quantity measuring circuit configured as described above is connected to the first electrode JIG + to input a forward harmonic signal, and the forward attenuation in which the harmonic signal penetrates the object to be measured and reaches the second electrode JIG−. Outputs a signal, is connected to the second electrode JIG-, and inputs a harmonic signal in the reverse direction, and outputs a reverse attenuation signal in which the harmonic signal penetrates the measurement object and reaches the first electrode JIG +, and forward attenuates it. Outputs electrical measurements of the signal and the reverse attenuation signal as positive and negative signals, respectively.

7 is a flowchart illustrating a procedure of a unit quantity measuring method according to the present invention, and FIG. 8 illustrates a method of measuring a unit quantity of a measurement object accommodated in a detection container using a unit quantity measuring circuit according to the present invention. Drawing.

As shown in FIG. 7, the unit quantity measuring method according to the present invention is a unit quantity measuring method using the unit quantity measuring apparatus described in FIGS. 1 to 6, and includes a setting step S100, a frequency modulation step S200, Frequency distribution step (S300), forward measurement step (S400), backward measurement step (S500), detection step (S600), calculation step (S700), display step (S800) and output step (S900).

In the setting step (S100), the number of times the average value is calculated and the range of harmonics are input in advance before the frequency modulation step.

In the frequency modulation step S200, a harmonic signal in which low frequencies are modulated at a high frequency is generated.

In the frequency distribution step S300, the harmonic signal is distributed in the forward and reverse directions.

In the forward measurement step S400, the harmonic signal in the forward direction is input to the first electrode, and the forward attenuation signal transmitted from the first electrode to the second electrode is transferred to the first input terminal of the first signal amplifier and amplified into a positive signal. To print.

In the reverse measurement step S500, the reverse harmonic signal is input to the second electrode, and the reverse attenuation signal transmitted from the second electrode to the first electrode is transferred to the second input terminal of the first signal amplifier and amplified into a negative signal. To print.

The detecting step S600 detects only low frequencies of the amplified positive and negative signals, and the calculating step S700 calculates an average value of the sum of absolute values of the detected positive and negative signals. . In addition, when the predetermined number of average values has not been reached (S750), the forward measurement step is performed again, and when it reaches the next display step (S800).

The display step S800 receives and displays an absolute value of a positive signal and a negative signal and an average value of a sum thereof.

Finally, the output step S900 outputs the value displayed in the display step.

It will be described in detail a method for measuring the unit quantity of the measurement object contained in the detection vessel using the unit quantity measuring method according to the present invention configured as described above.

8 is a view for explaining a method of measuring the unit quantity of the object to be measured contained in the detection vessel using the unit quantity measuring circuit according to the present invention. On the other hand, as described above, the first positive test from the first electrode JIG + to the second electrode JIG- using the harmonics in the unit quantity measurement, and the first electrode (JIG-) from the first electrode ( Bidirectional measurements are made through the reverse test to JIG +). At this time, it is assumed that the number of average value calculations is 30, and the range of harmonics is -50 mV to +50 mV.

As shown in FIG. 8, in the first forward test, a positive signal attenuated by passing +50 mV of the measurement signal source to the first electrode JIG + and passing through the detection vessel is applied to the second electrode JIG−. To reach. At this time, the moisture content is measured by the attenuation ratio of the applied signal / transmission signal.

In the second reverse test, -50 mV of the measurement signal source is applied to the second electrode JIG- so that the attenuated reverse signal reaches the first electrode JIG +. At this time, the moisture content is measured by the attenuation ratio of the applied signal / transmission signal.

Then, the average of the absolute value of the signal measured over the 1st and 2nd time is averaged by repeating the measurement 30 times in one test with the measurement signal.

At this time, the harmonics passing through the object to be measured between the first electrode and the second electrode are very minute voltages, and a difference between the transmission signal at the first time and the transmission signal at the second time occurs. That is, the difference between the exposed angle of the coarse aggregate in the measured object and the angle at which the signal is emitted is reflected or transmitted. Therefore, in order to change the firing angle of the measurement signal, the measurement signal is fired in the forward and reverse directions.

As shown in FIG. 6 and FIG. 8, an equation for calculating capacitance using bidirectional signal measurement using the first terminal and the second terminal is as follows.

 Here, V positive: voltage difference between the first electrode and the second electrode of the forward signal, V reverse: the voltage difference between the second electrode and the first electrode of the reverse signal, V1: measured over the first and second Average voltage of the absolute value of the signal)

After calculating the average voltage of the absolute value of the signal measured over the first and second through the equation (1), it is repeated 30 times the set average value calculation times to calculate the average value by the following equation.

 (V: represents the average voltage for 30 measurements.)

In this way, the average voltage for the calculated 30 measurements may be calculated using the following formula for the capacitance of the first electrode and the second electrode.

C is the electrostatic capacity, Q is the amount of charge, and V is the voltage.)

Thus, in the measurement method using harmonics, if a harmonic obtained by modulating a low frequency of 1 KHz at a high frequency of 50 MHz is transmitted through the measurement object, attenuation of gain [dB] of the transmitted frequency occurs according to the moisture content of the measurement object. The coefficient calculated by formulating the signal is calculated by converting it into a unit quantity.

Capacitance refers to the amount of charge stored (or separated) at a constant voltage. On the other hand, the capacitance is an equation calculated by the definition of "the capacitance is usually defined as the total amount of charge divided by the voltage of the object".

Due to this, the volume and weight are light and easy to move, and are configured separately, thereby reducing the replacement and maintenance costs due to failure or damage.

In addition, by measuring the amount of units using harmonics, it is not necessary to filter out mortar and to measure the mass.

Measurements are made by combining without the need for installation and can be measured on site at any time, so that the amount of change in the unit quantity can be grasped in a short time.

The present invention has been illustrated and described with reference to certain preferred embodiments, but the present invention is not limited to the above-described embodiments, and the present invention is not limited to the above-described embodiments. Various changes and modifications may be made by the user.

1 is an exploded perspective view showing the configuration of a unit quantity measuring apparatus according to the present invention.

Figure 2 is an exploded perspective view of the terminal portion and the detection vessel according to the present invention.

Figure 3 is an exploded perspective view and a combined perspective view of the detection body according to the present invention.

Figure 4 is a rear perspective view of the signal transmission plate of the detection body according to the present invention.

5 is a circuit diagram showing the configuration of the unit quantity measuring circuit of the detection body according to the present invention.

6 is a waveform diagram showing harmonics of a frequency modulator of a unit quantity measuring circuit according to the present invention;

7 is a flow chart showing the procedure of the unit quantity measurement method according to the present invention.

8 is a view for explaining a method for measuring the unit quantity of the measurement object accommodated in the detection vessel using the unit quantity measuring circuit according to the present invention.

<Description of Symbols for Main Parts of Drawings>

10: terminal 11: calling terminal

11a: Calling terminal 12,13: Detection terminal

12a: detection terminal face 13a, 13b, 13c: detection piece

13d: signal line 13e: detection terminal surface

20: detection vessel 21: coupling hole

22: accommodation space 30: detection body

32: connector 33: bottom plate

33a: terminal 34: signal transmission plate

34a: insertion groove 34b: terminal groove

34c: Protective cover 34c ': Hinge end

34c ": Hinge hole 34d: Hinge end

34d ': Hinge hole 34e: Hinge axis

35 cover plate 40 display unit

41: LCD screen 42: keypad

43: connector port 44: print port

45: power jack 50: printer

100: unit quantity measuring device

Claims (8)

A detection vessel 20 accommodating the object to be measured in a state in which a terminal portion 10 including a first terminal 11 and a second terminal 12 disposed to face each other therein is coupled; The detection vessel 20 is coupled, and a first electrode JIG + is connected to the first terminal 11 to input a harmonic signal in a positive direction (+,-), and the harmonic signal penetrates the object to be measured. To output the forward attenuation signal reaching the second terminal 12 through the second electrode JIG-, and the second electrode JIG- is connected to the second terminal 12 so that the reverse direction (-, A harmonic signal of +) is input, and a reverse attenuation signal transmitted through the object to be measured and reaches the first terminal 11 is output through the first electrode JIG +, and the forward attenuation signal is generated. And a unit quantity measuring circuit for outputting the electrical measurement value of the reverse attenuation signal as a positive signal and a negative signal, respectively, and a calculation unit for calculating an average value of the sum of absolute values of the positive signal and the negative signal. Detecting body 30 comprising; A display unit 40 receiving and displaying an average value of the absolute value and the sum of the positive signal and the negative signal of the detection body 30; And A printer 50 for outputting display values of the display unit; Including, The unit quantity measuring circuit, A frequency modulator 100 generating harmonics in which low frequencies are modulated at high frequencies; A frequency divider (200) for distributing the harmonic signals in forward (+,-) and reverse (-, +) directions; A first filter 210a and a first buffer 220a are connected in series to one end of the frequency divider 200 to input a positive harmonic signal to the first electrode JIG +, and to the second electrode. The second buffer 220d and the fourth filter 210d and the first input terminal 300b of the first signal amplifier 400 are connected to the electrode JIG− in series to connect the electrode 220 to the electrode JIG−. A forward measuring unit 300a which forwards the forward attenuation signal transmitted to the JIG− to the first input terminal 300b of the first signal amplifier 400 and amplifies and outputs a positive signal; A third filter 210c and a third buffer 220c are connected in series at the other end of the frequency divider 200 to input a harmonic signal of reverse (−, +) to the second electrode JIG−, and The second buffer 220b, the second filter 210b, and the second input terminal 310b of the first signal amplifier 400 are connected to the first electrode JIG + in series to connect the first electrode JIG + to the first electrode JIG +. A reverse measurement unit 310a for transmitting the reverse attenuation signal transmitted to the electrode JIG + to the second input terminal 310b of the first signal amplifier 400 to amplify and output a negative signal; And A biode detector (500) for detecting only low frequencies of the amplified positive and negative signals; Including, Unit quantity measuring device. The method of claim 1, The unit quantity measuring circuit further includes a controller for controlling the polarity of the forward and reverse directions, the number of times the average value is calculated, and the range of harmonics. Unit quantity measuring device. The method of claim 1, The unit quantity measuring circuit may include second to fourth signal amplifiers 110, 120, and 140 connected in series between the frequency modulator 100 and the frequency divider 200 to amplify the harmonic signal to a predetermined magnitude. Including more, Unit quantity measuring device. The method of claim 3, The unit quantity measuring circuit is connected to the fourth signal amplifier 140 and adjusts a range of signals of the first terminal 11 and the second terminal 12 according to the distance from the ground and the intensity of disturbance. The giving further includes a signal controller 150, Unit quantity measuring device. The method of claim 1, The unit quantity measuring circuit further includes a biode controller 520 connected to the biode detector 500 to adjust a low frequency input and output ratio. Unit quantity measuring device. The method of claim 1, The unit quantity measuring circuit further includes a converter for converting the detected low frequency into a digital signal, Unit quantity measuring device. A unit quantity measuring method using the unit quantity measuring apparatus of claim 1, Generating a harmonic signal in which low frequencies are modulated at high frequencies; A frequency distribution step of distributing the harmonic signals in forward and reverse directions; The forward harmonic signal is input to the first electrode, and the forward attenuation signal transmitted from the first electrode to the second electrode is transferred to the first input terminal of the first signal amplifier to amplify and output a positive signal. Forward measurement step; The reverse harmonic signal is input to the second electrode, and the reverse attenuation signal transmitted from the second electrode to the first electrode is transferred to the second input terminal of the first signal amplifier to amplify and output a negative signal. Reverse measurement step; Detecting only low frequencies of the amplified positive and negative signals; Calculating an average value of a sum of absolute values of the detected positive signal and the negative signal; A display step of receiving and displaying an average value of an absolute value and a sum of the positive signal and the negative signal; And An output step of outputting a value displayed in the display step; Unit quantity measurement method comprising a. The method of claim 7, wherein And a setting step of previously inputting the number of times the average value is calculated and the range of harmonics before the frequency modulation step, After the operation step, if the number of times of calculating the average value is not reached, the process returns to the forward measurement step and performs the step. Unit quantity measurement method.

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