JP7397776B2 - Ultrasonic measurement device, ultrasonic measurement method - Google Patents

Description

The present invention relates to an ultrasonic measuring device and an ultrasonic measuring method that perform measurements using ultrasonic waves, and is particularly applicable to measuring restrained long objects such as railway rails and piping, and measuring highly attenuating materials. Concerning effective techniques.

Ultrasonic technology is applied in a number of fields, including medicine, industry, fisheries, and resource exploration. In terms of measurement technology, for example, it is used for abdominal echocardiography, non-destructive testing, sonar, and visualization of sub-seafloor structures. In most cases of ultrasonic measurement, an ultrasonic probe is placed opposite the measurement target to transmit and receive ultrasonic waves, and the scattered waves generated at boundaries with different acoustic impedances (the product of sound speed and density) are received. The generated waveform signal is processed to obtain the desired result.

At this time, in order to obtain a high signal and low noise reception signal, the impedance of the probe serving as the termination must be the same value as the characteristic impedance of the wiring up to the termination, that is, the impedance of the device such as the amplifier or receiver. ideal. Here, impedance refers to an electrical resistance component in an AC circuit, and in an AC circuit, not only a resistor but also a coil and a capacitor become resistance components. Hereinafter, unless otherwise specified, impedance refers to this electrical impedance.

If these impedance values completely match, 100% of the electrical energy of the input wave will be transmitted to the probe, and strong ultrasonic waves will be oscillated. Matching is the process of matching the impedance of the device and the impedance of the probe connected to the end of the wiring.

If the impedance values are significantly different, strong reflection will occur at the terminal end, and the electrical energy will not be sufficiently transmitted to the probe.Furthermore, the reflected wave will be superimposed on the input wave, causing ultrasonic waves to oscillate from the probe. This may cause strong noise to oscillate.

The main frequency band used in medical and general industrial ultrasound imaging devices/measuring devices is approximately 1MHz to 15MHz. The impedance of the probe used in this frequency band does not deviate far enough from 50 ohms to cause major measurement problems. Therefore, even if no particular matching is required, there is little problem in measurement.

However, in measurement equipment that mainly uses ultrasonic measurements in the low frequency band, such as geophysical surveys and concrete inspections, in order to achieve both low frequency to suppress scattering attenuation and directivity to suppress diffusion attenuation, Both the thickness and area (aperture) of the piezoelectric element, which is the oscillation source of ultrasonic waves, tend to increase. Therefore, the impedance becomes on the order of kΩ and tends to deviate from 50Ω. In this way, when the characteristic impedance of the device and the impedance of the probe connected to the end of the wiring diverge (a mismatch occurs), it is necessary to provide a matching circuit in order to obtain sufficient transmission performance.

When transmitting and receiving ultrasonic waves, the thickness of the piezoelectric element built into the probe is a major factor that determines the ultrasonic oscillation and reception frequency bands. For example, for an ultrasound probe with a nominal frequency of 5MHz, a pulse voltage or burst voltage having a main band of 5MHz is applied to the probe to drive it, and the reflected wave of the ultrasound in the 5MHz band emitted from the probe is received. A piezoelectric element converts mechanical vibration into an electrical signal to obtain a received waveform. This means that if a matching circuit is provided, the same transmission path will be used during both transmission and reception, so naturally the same matching circuit will be used. Since the resonant frequency and anti-resonant frequency inherent to the probe are relatively close, even if the matching circuit is the same, the performance will not be significantly affected.

However, measurement technology that utilizes the nonlinear phenomenon of ultrasound generates harmonics, subharmonics, difference frequencies, and sum frequencies, and extracts and analyzes the corresponding frequency components from the received waves. Therefore, the frequency band of the transmitted wave and the frequency band of the received wave may be significantly different. In this case, impedance mismatch may occur if the same matching circuit is used during both transmission and reception.

Furthermore, when measuring a high-attenuation material using ultrasound, high-frequency components may be cut off and low-frequency components may mainly remain due to scattering reduction that occurs when ultrasound propagates inside the high-attenuation material. In such cases, it is necessary to transmit strong ultrasonic waves with a frequency that matches the probe during transmission, and to match them during reception so that high sensitivity is achieved in the frequency band that you want to detect. may occur.

Furthermore, even if a usage method is assumed in which transmission and reception are performed at an arbitrary frequency, with the resonant frequency far removed, mismatch may occur on both the transmitting side and the receiving side depending on the transmitting frequency.

As background technology in this technical field, there is a technology such as that disclosed in Patent Document 1, for example. In Patent Document 1, in order to suppress electrical noise (white noise) in waveforms obtained by transmitting and receiving ultrasonic waves, addition and averaging processing is normally performed using software, but it takes a long time to acquire waveforms multiple times. The problem is that the number of receivers used at the same time is increased and addition and averaging processing is performed using hardware.

Furthermore, Patent Document 2 discloses a transmitting/receiving type probe, in which a damping capacitance elimination circuit is provided in the reception line of the piezoelectric vibrator to change the resonance frequency of the piezoelectric vibrator to a lower frequency side, and the ultrasonic signal is transmitted. It is disclosed that sometimes the piezoelectric vibrator is driven at a resonant frequency, and when an ultrasonic signal is received, the anti-resonant frequency in the piezoelectric vibrator is changed to a lower frequency side by a damping capacitance elimination circuit to obtain the maximum reception sensitivity. .

Japanese Patent Application Publication No. 2014-173939 Japanese Patent Application Publication No. 11-153665

As mentioned above, in ultrasonic measurement, if the frequency band of the transmitted wave and the frequency band of the received wave are significantly different, even if the impedance of the device up to the probe matches the impedance of the probe at the time of transmission, the impedance on the receiving side This results in misalignment, resulting in a decrease in ultrasonic measurement sensitivity.

The above-mentioned Patent Document 1 states that as the number of receivers used simultaneously increases, the value of electrical matching with the probe changes, so it is necessary to adjust the variable matching circuit based on the number of receivers to improve transmission and reception performance. Are listed. However, Patent Document 1 does not mention the problem caused by the difference in frequency between transmission and reception as described above.

Further, Patent Document 2 assumes that the frequencies of the transmitted wave and the received wave are the same, and similarly to Patent Document 1, there is no mention of problems caused by differences in frequencies during transmission and reception.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide an ultrasonic measuring device and an ultrasonic measuring method that measure using ultrasonic waves, and to independently adjust the impedance when transmitting and receiving ultrasonic waves according to the measurement target and measurement conditions. An object of the present invention is to provide an ultrasonic measuring device and an ultrasonic measuring method that can be matched.

In order to solve the above problems, the present invention includes a measurement section including an ultrasound probe, a transmission section that applies a pulse voltage to a piezoelectric element in the ultrasound probe, and a pulse voltage that the piezoelectric element generates by receiving ultrasound waves. A receiving section that converts an electrical signal and acquires it as waveform data, and a control section that controls the transmitting section and the receiving section, and a variable matching device is provided in at least the receiving section of the transmitting section and the receiving section. The control unit includes an input device for inputting a frequency component value when the reception unit receives the electric signal, and a storage device for storing frequency dependence data of a matching value corresponding to the ultrasound probe. and a matching control device that controls the variable matching device by referring to the frequency component value inputted by the input device and the frequency dependence data of the matching value stored in the storage device .

The present invention also provides an ultrasonic measurement method for measuring a subject using an ultrasonic measurement device having the above characteristics , wherein the control section inputs a desired receiving frequency of ultrasonic waves according to measurement conditions. and a step of the matching control device adjusting the impedance of the variable matching device of the receiving section based on the receiving frequency.

According to the present invention, in an ultrasonic measuring device and an ultrasonic measuring method that perform measurements using ultrasonic waves, it is possible to independently match the impedance when transmitting and receiving ultrasonic waves according to the measurement target and measurement conditions. An ultrasonic measuring device and an ultrasonic measuring method can be provided.

This allows the output during transmission and the sensitivity during reception to be maximized, making it possible to achieve highly accurate measurement using ultrasonic waves.

Problems, configurations, and effects other than those described above will be made clear by the following description of the embodiments.

1 is a schematic configuration diagram of an ultrasonic measuring device according to Example 1 of the present invention. FIG. 2 is a schematic diagram of data stored in a storage device. It is a flowchart which shows the ultrasonic measurement method based on Example 2 of this invention. 12 is a flowchart showing an impedance matching method on a transmitting side and a receiving side according to a third embodiment of the present invention. FIG. 7 is a diagram showing frequency characteristics of impedance matching values according to Example 3 of the present invention. It is a schematic block diagram of the ultrasonic measuring device based on Example 4 of this invention. It is a flowchart which shows the ultrasonic measurement method based on Example 4 of this invention.

Embodiments of the present invention will be described below with reference to the drawings. Note that in each drawing, the same components are denoted by the same reference numerals, and detailed explanations of overlapping parts will be omitted.

With reference to FIGS. 1 and 2, the configuration and operation (effect) of the ultrasonic measuring device according to the first embodiment of the present invention will be described. FIG. 1 is a schematic configuration diagram of an ultrasonic measuring device 1 of this embodiment. The ultrasonic measuring device 1 of this embodiment is roughly divided into a measuring section 2 including an ultrasonic probe, a transmitting section 3, a receiving section 4, a control/processing section (computer) 5, and a display section 6. Note that although FIG. 1 shows an example in which the configuration of the ultrasonic measurement device 1 includes the display unit 6, the display unit 6 may be installed independently of the ultrasonic measurement device 1.

The measurement unit 2 mainly includes an ultrasonic probe, a subject, and a fixture for fixing them (not shown). The ultrasonic probe may be a single-type probe with a single element, or an array probe with multiple elements.

The transmitting section 3 and the receiving section 4 match not only the transmitting section 3 but also the receiving section 4 on their respective lines to maximize power transmission efficiency and transmit strong ultrasound to the ultrasound probe during transmission. In addition to oscillating, the vibration can be converted into an electrical signal by a piezoelectric element (not shown) during reception, and the electrical signal can be efficiently transmitted to the receiver.

The transmitter 3 includes a pulser 7, an amplifier 8, and a variable matching device A (9). The pulser 7 repeats the shape and voltage of the transmission pulse received by the input device 10 of the control/processing unit (computer) 5 or the transmission pulse stored in the storage device 11 and sends a signal to the amplifier 8 based on values such as frequency. Send. The amplifier 8 amplifies the transmitted signal based on the amplification value.

The variable matching device A (9) matches the impedance of the amplifier 8 and the ultrasonic probe of the measurement unit 2 with reference to the value of the transmission frequency. With matching achieved, a voltage is applied to the piezoelectric element within the ultrasound probe to oscillate ultrasound.

The receiving section 4 includes another variable matching device B (12) and a receiver 13. The variable matching device B (12) matches the impedance of the ultrasound probe and the receiver 13 with reference to the value of the reception frequency. In a matched state, the electric signal generated by receiving the ultrasonic wave with the piezoelectric element is amplified, A/D converted, etc., and acquired as waveform data, and the received waveform data is stored in the control/processing unit (computer) 5, which will be described later. Transfer data to memory.

Variable matching can be adjusted continuously using an electronic circuit that includes a variable capacitor, variable coil, or variable resistor, or by setting up a matching circuit using multiple non-variable capacitors, coils, and resistors, and then using a switch. It can be adjusted discretely by controlling the connection.

The control/processing unit (computer) 5 includes a storage device 11 , a transmission/reception control device 14 , an input device 10 , and a matching control device 15 .

FIG. 2 shows a schematic diagram of data stored in the storage device 11. The storage device 11 stores reception frequency data, which is a feature of the present invention, and values as transmission and reception conditions accepted by the input device 10 in FIG. 1, as well as transmission frequency data, probe specification data, display (gate) conditions, and transmission conditions. Stores waveform data, received waveform data, received waveform analysis data, etc.

The transmission/reception control device 14 has a function of controlling the voltage, pulse width, repetition frequency, amplification value, sampling frequency, data storage timing, etc. of the transmission pulse voltage.

The input device 10 is a general device for inputting information using means such as a keyboard, a mouse, and a touch panel.

The matching control device 15 controls the variable matching device A (9) in the transmitting section 3 and the other variable matching device B (12) in the receiving section 4 to match the frequency used for transmission stored in the storage device 11 and the receiving frequency. can be controlled using a desired frequency.

The display unit 6 has a function of displaying measured raw waveforms, processed waveforms, image reconstruction results, etc., in addition to values necessary for controlling transmission and reception of ultrasound and recording conditions.

Note that, although not essential to the configuration of the present invention, a scanning section is required when scanning with an ultrasonic probe. The scanning section includes a scanner and a scanner control device. The scanner fixes, scans, and moves the ultrasound probe and object. The scanner control device scans and moves the ultrasonic probe and the subject at a predetermined timing and range based on the scanning conditions stored in the control/processing unit (computer) 5, and You can change the positional relationship.

As explained above, the ultrasonic measuring device 1 of this embodiment includes a measuring section 2 including an ultrasonic probe, a transmitting section 3 that applies a pulse voltage to a piezoelectric element in the ultrasonic probe, and a transmitting section 3 that applies a pulse voltage to a piezoelectric element in the ultrasonic probe. It is equipped with a receiving section 4 that converts the electrical signal generated by receiving the signal and acquires it as waveform data, and a control section (control/processing section 5) that controls the transmitting section 3 and the receiving section 4. 4, at least the receiving section 4 has a variable matching device B (12), and the control section (control/processing section 5) inputs the frequency component value when the receiving section 4 receives the electrical signal. It has an input device 10, a storage device 11 that stores frequency dependence data of matching values corresponding to the ultrasound probe, and a matching control device 15 that controls the variable matching device B (12) by referring to the frequency of the electrical signal. are doing.

According to this embodiment, it is possible to independently match the impedances when transmitting and receiving ultrasonic waves according to the measurement target and measurement conditions.

Further, even if the frequency band at the time of transmission and the frequency band at the time of reception are different, measurement performance can be improved by maximizing the output at the time of transmission and the sensitivity at the time of reception, respectively.

Referring to FIG. 3, an inspection method using the ultrasonic measuring device 1 shown in FIG. 1 will be described. FIG. 3 is a flowchart showing the ultrasonic measurement method of this embodiment. Note that the basic inspection method is the same as that of general ultrasound imaging devices.

First, in step S000, ultrasonic measurement is started. Next, in step S001, measurement conditions are read. Here, the receiving frequency, which is the data read in step S001, which is a feature of the present invention, is input from the input device 10 to the storage device 11 in step S008. The reception frequency is a value to be input when the frequency of particular interest can be predicted from among the frequency distribution included in the desired reception signal.

For example, if the main frequency included in the transmitted wave is f, and you want to detect subharmonics/harmonics of f/2, 2f, 3f, etc. with high sensitivity due to the nonlinear phenomenon that occurs between transmission and reception, two frequencies ( There is a case where it is desired to use a parametric wave in which fa, fb (fb<fa) is mixed to sensitively detect the frequency fa−fb, which is the difference frequency component between the two waves.

Other general measurement conditions that should be read include, as mentioned above, the voltage waveform applied to the ultrasonic probe as the setting conditions for transmission and reception, the repetition frequency for repeating transmission and reception, and, if necessary, the peak of the reception waveform. Examples include time gates and frequency filters for extracting intensity.

Note that the voltage waveform to be applied to the ultrasound probe may be generated in advance by reading a constant into a specific function or using arbitrary waveform data in step S007.

After the reading of the measurement conditions is completed in step S001, the values of the variable matching device A (9) of the transmitting section 3 and the variable matching device B (12) of the receiving section 4 are set by the matching control device 15 in step S002 using a method described later. Then, the transmitter 3 and the receiver 4 match each other.

After impedance matching (adjustment) on the transmitting side and receiving side is completed in step S002, ultrasound is transmitted to the subject in step S003, the ultrasound is received in step S004, and the received waveform is displayed on the display in step S005. 6 or saved in the storage device 11, and the measurement is ended in step S006.

With reference to FIGS. 4 and 5, impedance adjustment on the transmitting side and receiving side in step S002 of the second embodiment (FIG. 3) will be described in detail. FIG. 4 is a flowchart showing an impedance matching method on the transmitting side and the receiving side in this embodiment. FIG. 5 is a diagram showing frequency characteristics of impedance matching values.

First, in step S100, matching in the transmitter 3 is started.

Next, in step S101, the strongest frequency component included in the input waveform (transmission waveform) is read as an input value. In most cases, you will input a value close to the resonant frequency, which is affected by the thickness of the piezoelectric vibrator inside the ultrasound probe. However, in exceptional cases, ultrasonic waves can be oscillated at a frequency that is intentionally far from the resonant frequency, such as by applying a voltage of about 100kHz even if the resonant frequency is 5MHz. can do.

In any case, in the next step S102, the frequency to be oscillated is input to the matching control device 15 of the control/processing unit (computer) 5, and the impedance of the ultrasound probe at that frequency is determined by the impedance of the amplifier 8 (usually 50Ω). ) The impedance of the variable matching device A (9) is adjusted by the matching control device 15 so as to match the value.

After the impedance adjustment of the transmitter 3 is completed, matching in the receiver 4 is started in step S103.

Subsequently, in step S104, as described above, the value of a desired frequency component in the obtained received signal is read as an input value.

Next, in step S105, the frequency to be oscillated is input to the matching control device 15 of the control/processing unit (computer) 5, and the impedance of the ultrasonic probe at that frequency is matched with the impedance of the receiver 13 (also usually 50Ω). Then, the impedance of the variable matching device B (12) is adjusted by the matching control device 15.

Finally, in step S106, the adjustment of the variable matching device A (9) of the transmitting section 3 and the variable matching device B (12) of the receiving section 4 is completed, and the process moves on to transmitting ultrasonic waves in step S003 in FIG. .

A method for determining the impedance value of the variable matching of the transmitter 3 and the receiver 4 will be explained using a typical matching circuit using a coil and a capacitor shown in FIG. The values of the coils and capacitors required for impedance matching are determined by understanding the frequency characteristics of the impedance of the ultrasonic probe using an impedance analyzer, etc. This can be determined by finding the impedance of the sonic probe and solving simultaneous equations.

In this simultaneous equation, each equation is solved so that the resistance and reactance components of the impedance of the ultrasound probe match the resistance components (usually 50Ω) and reactance components (usually 0Ω) of the impedance on the equipment side. . The impedance of the variable matching may be controlled according to the solution of this simultaneous equation.

For this reason, it is a good idea to associate the probe model number of the ultrasound probe with the impedance frequency characteristic data and store it in the storage device 11, specify the probe model number at the measurement preparation stage, and find the value to be adjusted with variable matching. .

With reference to FIGS. 6 and 7, the configuration and operation (effect) of an ultrasonic measuring device according to a fourth embodiment of the present invention will be described. FIG. 6 is a schematic configuration diagram of the ultrasonic measuring device 1 of this embodiment. FIG. 7 is a flowchart showing the ultrasonic measurement method of this embodiment.

In this embodiment, a case will be described in which a received signal obtained with respect to a transmitted signal cannot be predicted, that is, a case in which a frequency included in the received signal cannot be predicted.

As shown in FIG. 6, the ultrasonic measuring device 1 of the present embodiment is the same as the embodiment 1 in that it includes an input/control unit 16 in place of the control/processing unit (computer) 5 of the embodiment 1 (FIG. 1). It is different from The other configurations are the same as in Example 1 (FIG. 1).

The input/control unit 16 includes a storage device 11 , a transmission/reception frequency input device 17 , an input waveform control device 18 , a received waveform evaluation device 19 , and a variable matching control device 20 .

If the frequency included in the received signal cannot be predicted, a received waveform evaluation device 19 may be provided in the input/control unit 16 to perform frequency analysis of the received waveform.

The measurement method at this time will be explained using FIG. 7. The steps up to step S005 shown in Example 2 (FIG. 3) are the same.

In the present embodiment, as shown in FIG. 7, first, in step S201, a received waveform is subjected to frequency analysis represented by Fourier transform.

Next, in step S202, a peak analysis of the frequency distribution of the frequency analysis result is performed, and a peak frequency is extracted and saved.

Subsequently, in step S203, the receiving frequency is re-inputted based on the result obtained in step S202. At this time, there may be a plurality of peak frequencies.

Next, in step S204, the measurement conditions are reread, and in step S205, the impedance of the variable matching device B (12) of the receiving section 4 is readjusted.

Subsequently, the ultrasonic wave is transmitted in step S206, the ultrasonic wave is received in step S207, and the measurement results are displayed and saved in step S208.

Next, in step S209, it is determined whether the variable matching device B (12) of the receiving section 4 is readjusted for all the extracted frequencies and the measurement is completed. If the measurement has not been completed, the process returns to step S203, and if the measurement has been completed, the measurement ends in step S210.

By using this method, for example, when measuring by propagating ultrasonic waves through a high-attenuation material, scattering and attenuation of high-frequency components will cause the frequency distribution contained in the received signal to be higher than that contained in the transmitted signal. It is also possible to deal with cases where it is impossible to predict that the frequency distribution will shift to the lower frequency side.

An ultrasonic measuring device and an ultrasonic measuring method according to a fifth embodiment of the present invention will be described.

In this embodiment, an example of a case where ultrasonic waves are oscillated at a given frequency and measured in a plurality of different frequency bands by intentionally setting the frequency far from the resonant frequency will be given to supplement the explanation. Such measurements may be performed using guided wave testing or the like.

When a probe with a resonant frequency of 5 MHz is oscillated at 20 kHz, 40 kHz, 60 kHz, 80 kHz, and 100 kHz, the value of variable matching device A (9) of transmitting section 3 and variable matching device B (12) of receiving section 4 adjusted to 20 kHz. adjust, transmit and receive, and save the waveform. It is a good idea to sequentially implement this for 40kHz, 60kHz, 80kHz, and 100kHz.

An ultrasonic measuring device and an ultrasonic measuring method according to a sixth embodiment of the present invention will be described.

Even if the impedance values of the variable matching of the transmitter 3 and the receiver 4 are adjusted according to the solution of the simultaneous equations, deviations from the actual values may occur. In this case, for example, time gates are applied to the received waveform to target obvious reflected signals, such as bottom surface (shape) echoes in ultrasonic testing of metal structures, or surface echoes of the object in the water immersion method. It is a good idea to monitor the peak value and fine-tune each matching circuit.

That is, using the solution of the simultaneous equations as an initial value, the variable matching device A (9) of the transmitter 3 is scanned around the initial value, and the optimum value is determined when the received waveform has the maximum peak value. Next, the variable matching device B (12) of the receiving section 4 also scans around the initial value and sets the optimum value where the received waveform has the maximum peak value. In this way, it is best to independently control the impedance of the variable matching on the transmitting side and the receiving side to find the optimum value.

Note that the present invention is not limited to the above-described embodiments, and includes various modifications. For example, the above embodiments have been described in detail to aid understanding of the present invention, and the present invention is not necessarily limited to having all the configurations described. Furthermore, it is possible to replace a part of the configuration of one embodiment with the configuration of another embodiment, and it is also possible to add the configuration of another embodiment to the configuration of one embodiment. Further, it is possible to add, delete, or replace a part of the configuration of each embodiment with other configurations.

DESCRIPTION OF SYMBOLS 1... Ultrasonic measuring device, 2... Measuring section, 3... Transmitting section, 4... Receiving section, 5... Control/processing section (computer), 6... Display section, 7... Pulser, 8... Amplifier, 9... Variable matching device A, 10...input device, 11...storage device, 12...variable matching device B, 13...receiver, 14...transmission/reception control device, 15...matching control device, 16...input/control unit, 17...transmission/reception frequency input device , 18... Input waveform control device, 19... Received waveform evaluation device, 20... Variable matching control device.

Claims (8)

A measurement unit including an ultrasonic probe,
a transmitter that applies a pulse voltage to a piezoelectric element within the ultrasound probe;
a receiving unit that converts the electric signal generated by the piezoelectric element upon receiving the ultrasonic wave and acquires it as waveform data;
a control unit that controls the transmitting unit and the receiving unit,
Of the transmitter and the receiver, at least the receiver includes a variable matching device;
The control unit includes an input device for inputting a frequency component value when the reception unit receives the electrical signal;
a storage device that stores frequency dependence data of matching values corresponding to the ultrasound probe;
and a matching control device that controls the variable matching device by referring to the frequency component value input by the input device and the frequency dependence data of the matching value stored in the storage device. Measuring device. The ultrasonic measuring device according to claim 1,
The ultrasonic measuring device is characterized in that the control section includes a transmission/reception control device that controls the pulse width, repetition frequency, and amplification value of the pulse voltage output from the transmitting section and the sampling frequency of the receiving section . The ultrasonic measuring device according to claim 1,
The ultrasonic measurement device is characterized in that the control unit includes a peak monitor of the electrical signal at a specific time gate, or a received waveform evaluation device that performs peak analysis of a frequency analysis result of the electrical signal. The ultrasonic measuring device according to claim 1,
An ultrasonic measurement device characterized by having a display section that displays values necessary for controlling transmission and reception of ultrasonic waves, measured raw waveforms, and processed waveforms . The ultrasonic measuring device according to claim 1,
sequentially applying pulse voltages of a plurality of different frequencies from the transmitter to the piezoelectric element,
An ultrasonic measuring device that measures a subject based on waveform data acquired by the receiving section. An ultrasonic measurement method for measuring a subject using the ultrasonic measurement device according to claim 1, comprising :
a step in which the control unit reads an input of a desired reception frequency of the ultrasonic wave as one of the measurement conditions;
the matching control device adjusting the impedance of the variable matching device of the receiving section based on the receiving frequency;
An ultrasonic measurement method characterized by having the following. An ultrasonic measurement method for measuring a subject using the ultrasonic measurement device according to claim 3 ,
a step in which the receiving unit converts the electrical signal generated by the piezoelectric element upon receiving the ultrasonic wave and obtains it as received waveform data;
the received waveform evaluation device frequency-analyzing the received waveform data ;
a step in which the received waveform evaluation device performs peak analysis and extraction of the frequency analysis results;
the received waveform evaluation device inputting the extracted frequency again as a measurement condition;
the matching control device adjusting the impedance of the variable matching device of the receiving section based on the extracted frequency;
An ultrasonic measurement method characterized by having the following. The ultrasonic measurement method according to claim 6,
the ultrasound probe applies ultrasound waves of a plurality of different frequencies to the subject;
An ultrasonic measurement method characterized by measuring a subject based on waveform data acquired by the receiving section .

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