TWI489802B - The ultrasonic system having the real-time monitored apparatus - Google Patents

Description

Ultrasonic instant power monitoring system

The present invention relates to an instant power monitoring system and method of use thereof, and more particularly to an ultrasonic instantaneous power monitoring system and method of use thereof.

At present, the equipment made by the "supersonic" principle has been widely used in various major industrial fields such as machinery, electronics, electrical machinery, medical treatment, and chemistry. The traditional ultrasonic market can be divided into three categories, including the "high output ultrasound" market, the "low output ultrasound" market and the "medical ultrasonic" market.

In the "high-output ultrasound" industry, ultrasonic waves can be applied to ultrasonic cleaning, that is, the innumerable micro-bubbles generated when ultrasonic waves are introduced into a liquid, and instantaneously blasted and regenerated to impact the stains attached to the cleaning objects. . Or for ultrasonic assembly (including welding and welding), ultrasonic machining (including cutting and excavation), and other industrial applications.

In the "low output ultrasound" market, ultrasonic waves can be applied to non-destructive detection, that is, ultrasonic waves with low energy and high frequency, detecting defects inside the object, or using air induction control, flow meters and Manipulating machines, leak detection, and other newly developed applications.

Ultrasound is more widely used in medical fields, such as ultrasound imaging, ultrasound drug introduction, ultrasound beauty, and focused ultrasound for tumor burning applications. Generally, medical ultrasound uses the property that mechanical pressure waves can propagate in the human body to resolve the soft tissue type of the human body. For example, the ultrasonic image detector is based on the echo characteristics of ultrasonic waves in human tissue. According to the basic principle of sound wave transmission, the speculative echo position and tissue dynamic structure are analyzed to reveal the soft tissue type of the human body. Therefore, the clinical ultrasound image detector can be dynamic. Check the shape of the physiological soft tissue, monitor the blood flow velocity of the blood vessel, and display the abnormal musculoskeletal system.

In the application of the aforementioned various ultrasonic instrument devices, an important consideration is whether the output power of the ultrasonic wave can be stably controlled. For example, in general circuit products, most of the fixed power outputs are provided, and are usually purely resistive loads, so the output load power is relatively stable. For example, in the circuits used in ultrasonic equipment, including various types of ultrasonic welding machines, ultrasonic cleaning machines, etc., the driving force driven by the driving circuits of various ultrasonic instruments (including capacitive and Inductively resonating piezoelectric sheet elements) have impedance characteristics that vary with frequencies due to environmental factors such as thermal changes and load variations. Therefore, when the impedances of the driving circuit and the load end cannot match each other, the input signal is reflected back to the driving end, so that the ultrasonic output power of the ultrasonic wave cannot be constant, and the output efficiency of the ultrasonic wave cannot be guaranteed.

In addition, since the reflected power of the ultrasonic wave cannot be observed, after the ultrasonic instrument device is used for a long time, the internal circuit loss or even damage is easily caused, so that the energy transmitted to the load end is attenuated, thereby affecting the overall performance of the product.

If the introduction of ultrasonic drugs is applied to contact with the skin and other cosmetic maintenance, since the power output of the ultrasonic waves involves the safety of the ultrasonic energy radiation of the human body, there should be a higher standard safety specification, so in the field of ultrasonic applications. Ultrasonic power monitoring has become an indispensable design.

Therefore, it is possible to stably control the output power of the ultrasonic wave, and in order to be able to monitor the ultrasonic power, thereby generating a more efficient ultrasonic system and its equipment, it is extremely necessary to develop a new type of ultrasonic technology, thereby improving the ultrasonic efficiency and capable of Reduce development time and associated manufacturing costs.

It is an object of the present invention to provide an ultrasonic instantaneous power monitoring system and method thereof for use in improving existing devices to improve performance.

The ultrasonic sound power monitoring system of the invention comprises a signal generator, a power amplifier, a double directional coupler, a matching circuit and a piezoelectric piece; wherein the double directional coupler comprises a voltage stabilizing circuit, a micro single chip, And a liquid crystal display device.

The invention is connected to the power amplifier by the signal generator, and then connected to the double directional coupler, continues to connect the matching circuit, and finally connects the piezoelectric piece. The dual directional coupler is connected to the micro-single chip, and the micro-single chip is connected to the voltage stabilizing circuit and the liquid crystal display device.

The invention uses a signal generator to generate an input signal, and then transmits the input signal through the power amplifier, and then connects the input signal to the dual directional coupler, passes through the measurement of the dual directional coupler, passes to the matching circuit, and finally connects. To the piezoelectric sheet. After receiving the input signal, the dual directional coupler transmits the input signal to the micro-single chip, and the voltage regulator circuit also transmits the voltage to the micro-single chip, and after inputting the input signal through the micro-single chip, the input signal is transmitted to the liquid crystal display device.

The dual directional coupler technology used in the present invention is mainly used for measuring the output and reflected power of ultrasonic waves and general circuit systems, and obtaining the reflected power of the system to avoid damage of the ultrasonic system caused by excessive reflection power.

The dual directional coupler technology used in the present invention does not affect the output power of the ultrasonic system except when measuring the ultrasonic system, and the present invention can monitor the power variation of the ultrasonic system at any time while the ultrasonic system is operating.

The power supply of the invention is provided with a voltage stabilizing circuit, so that the AC circuit can be directly connected to provide a stable power supply for the device such as the dual directional coupler and the microchip voltage, so that the advantages of the portable type can be achieved.

Therefore, the advantages and spirit of the present invention can be further understood from the following detailed description of the invention and the accompanying drawings.

The invention relates to an ultrasonic instantaneous power monitoring system and a method thereof, which adopts a dual directional coupler technology for real-time power monitoring, thereby improving monitoring efficiency and thereby improving ultrasonic output performance.

FIG. 1 shows an ultrasonic sound power monitoring system of the present invention, the main components of which include a signal generator 101, which generates a signal; a power amplifier 102, the power amplifier The power can be amplified; a directional coupler 115, the dual directional coupler 115 can measure power; a matching circuit 103, a piezoelectric sheet 104; and the dual directional coupler 115 further includes a voltage stabilizing circuit 116. The voltage stabilizing circuit 116 can perform voltage reduction; the micro-single chip 117 converts the power measuring signal into an analog signal, performs measurement of AC/DC current conversion, and the liquid crystal display (LCD) display device 118 can display the measurement result. .

Still as shown in Fig. 1, the power amplifier 102 is connected to the signal generator 101, the dual directional coupler 115 is connected, the matching circuit 103 is continuously connected, and the piezoelectric wafer 104 is finally connected. The dual directional coupler 115 is connected to the micro-single chip 117, and the micro-single chip 117 is connected to the voltage stabilizing circuit 116 and the liquid crystal display device 118, respectively.

The method for using the ultrasonic power monitoring system of the present invention includes first generating an input signal by using the signal generator 101, and then transmitting the input signal through the power amplifier 102, and transmitting the input signal to the dual directional coupler 115. After the measurement of the dual directional coupler 115, it is transmitted to the matching circuit 103 and finally to the piezoelectric sheet 104. After receiving the input signal, the dual directional coupler 115 transmits the input signal to the micro-single wafer 117, and also uses the voltage stabilizing circuit 116 to transmit the voltage to the micro-single wafer 117. After processing the input signal by using the micro-single chip 117, the input is transmitted. The signal is sent to the liquid crystal display device 118.

As shown in Figure 2, the directional coupler is an energy transfer coupling circuit that does not affect the output of the ultrasonic amplifier and probe. The theoretical basis is called transmission line theory. Transmission line theorem), as shown in Figure 2, is the transmission of two adjacent and parallel conductors with a length of λ/4. When energy flows through one of the conductors, energy is coupled to the other conductor. . At this point, the directional coupler has a four-turn network. The main line is divided into two parts, including the input port of P _{1 and} the Transmitted Port of P ₂ in Figure ₂ ; It is the coupled port of P ₃ and the isolated port of P ₄ . The directional coupler is a linear system, and its input position can be arbitrarily changed. Each port can be an input terminal. Once the position of the input signal is determined, it can be determined according to the relative position. The output signal corresponding to other ports. For example, under ideal conditions, when the signal power is input from the input ,, the output power will only appear in the transmission 埠 and the coupling 埠, while the isolation 埠 is completely isolated and has no power output. But in reality, there is always some power that leaks into the isolation barrier. When the input power of the input 埠 is set to P1, the output power of the transmission 为 is P2, the output power of the coupling 为 is P3, and the output power of the isolation 为 is P4, so the characteristics of the directional coupler can be defined, including defining Four indicators, such as coupling degree, insertion loss, isolation and directionality, are in dB.

Coupling factor represents the power input from the input 以及 and the ratio coupled to the coupled 埠 portion, expressed as:

Coupling factor (dB) = -10log (P3 / P1)

Insertion Loss represents the energy loss from input 埠 to transfer ,, expressed as:

Insertion Loss(dB)=10log[1-(P3/P1)]

In an ideal directional coupler, the isolation 埠 has no power output, but in fact there will be some power leakage from the isolation ,, which is an indicator of isolation (Isolation), which is expressed as follows:

Isolation(dB)=-10log(P4/P1)=-10log(P3/P2)

The ratio between the output power of the coupled 和 and the isolated 埠 output power can be defined as Directivity, expressed as:

Directivity (dB) = -10 log (P4 / P3)

Specifically stated is the degree of coupling, the relationship between isolation and directionality is:

Isolation (I) = Coupling degree (C) + Directionality (D)

The directional coupler can be constructed of coaxial, waveguide, microstrip, and stripline circuits. Typically, directional couplers are used for signal sampling for measurement and monitoring, signal distribution and synthesis.

In addition, the directional coupler can be used as a core component of network analyzers, antenna analyzers, and test instruments such as Thru line power meters. The directional coupler can sample forward and reflected signals. The directionality of the directional coupler is an important indicator, especially in the field of signal synthesis and reflection measurement. Usually the directional coupler is used in a frequency range of more than a million Hertz (MHz) or higher, and the upper limit of the frequency is determined by the length of the wire, and the length is about a quarter of the wavelength of the highest operating frequency.

As shown in FIG. 3, a circuit diagram of a dual directional coupler used in the present invention uses two sets of transformers for coupling signals, and a set of transformers is responsible for coupling current signals and calculating through the resistors. The ideal output voltage (Vf), the other set of transformers is responsible for coupling the actual output voltage (Vo), through the design of the circuit to achieve the ideal voltage minus the actual output voltage to obtain the reflected voltage (Vr). The final measured output voltage and reflected voltage can be converted to output power (Pf) and reflected power (Pr), and the voltage standing wave ratio (VSWR) can be calculated. The voltage standing wave ratio refers to the ratio of the highest voltage amplitude to the lowest voltage amplitude in the state of the standing wave. It can also be used to indicate the efficiency of energy transfer. The value is between 1 and infinity (∞). The smaller, the higher the transmission efficiency. In addition, with the microchip A/D conversion, the reflected voltage value, the output voltage value, and the like can be immediately displayed on the liquid crystal display (LCD) to allow the user to adjust the external power.

As shown in the voltage-stabilizing circuit 116 shown in FIG. 4, when the power supply 401 of 220 volts (V) is input, in order to prevent the instantaneous surge from hitting the inside, the surge absorber 402 (TNR Q417A) is mounted on the front end. 220 volts is then transferred to 9 volts via transformer 403, alternating current is passed through rectifier 404 to direct current, and then a voltage of 5 volts is supplied from a regulated crystal 405 (MOS).

As shown in the circuit diagram of the liquid crystal display device 118 shown in FIG. 5, the power measurement signal is converted into an analog signal by a micro-single chip (PIC18F652) 117 to measure the AC/DC current conversion; wherein the 16 MHz oscillator 116 is used. For the operating frequency inside the micro-single wafer 117, the output voltage value, the reflected voltage value, and the like obtained by the dual directional coupler 115 are transferred to the micro-single wafer 117 for AC/DC current conversion, and then transmitted to the liquid crystal display device 118. To display the results.

As shown in FIG. 6, the method for using the micro-single wafer 117 is as follows: in step 601, the reflected voltage and the output voltage are first converted into digital signals; and in step 602, the AC/DC current is converted; and then, as in step 603, The liquid crystal screen is initialized; then, in step 604, a look-up table is performed inside the micro-single wafer 117, respectively, indicating a thousandth, a hundredth, a tenth, and a single digit; and finally, as step 605, the converted result is used. The liquid crystal display device 118 displays the results.

Fig. 7A and Fig. 7B show the test results of the present invention at 354 kHz, wherein Fig. 7A is the forward power and Fig. 7B is the test result of the reflected power.

Figs. 8A and 8B show the results of the test at 652 kHz, wherein Fig. 8A is the forward power and Fig. 8B is the test result of the reflected power.

Fig. 9A and Fig. 9B show the test results of the present invention at 20 kHz, wherein Fig. 9A is the forward power and Fig. 9B is the test result of the reflected power.

Therefore, as shown by the above data, when the input voltage is increased, the power is increased, and the load is well matched, so the reflected power is very low. The input and output voltages obtained after the test are calculated, and the obtained power is The voltage standing wave ratio is close to the measured value, so it can be determined that the dual directional coupler can accurately measure the change of the power and voltage standing wave ratio.

The invention develops an ultrasonic power monitoring circuit system with low cost, high precision and wide application frequency range, and is introduced into the current ultrasonic product. In addition to a small increase in cost, the ultra-sonic products with instant power monitoring can greatly improve the added value of the products themselves, and also ensure the accuracy of ultrasonic power output, so as to improve the performance of industrial applications.

The invention can accelerate the time of improving the circuit, reduce the excessive reflected power, prolong the life of the product, and improve the efficiency of circuit transmission, reduce power consumption and reduce cost.

The above is only the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention; all other equivalent changes or modifications which are not departing from the spirit of the present invention should be included in the following. Within the scope of the patent application.

101. . . Signal generator

102. . . Power amplifier

103. . . Matching circuit

104. . . Piezoelectric sheet

115. . . Double directional coupler

116. . . Regulator circuit

117. . . Micro-single chip

118. . . LCD screen display device

401. . . power supply

402. . . Surge absorber

403. . . transformer

404. . . Rectifier

405. . . Regulated crystal

Figure 1 shows the ultrasonic instantaneous power monitoring system of the present invention.

Figure 2 shows the operating principle of the directional coupler.

Fig. 3 is a circuit diagram showing a dual directional coupler used in the present invention.

The voltage regulator circuit diagram shown in Figure 4.

Figure 5 is a circuit diagram of a liquid crystal display device.

Figure 6 shows the use of a micro-single wafer.

Fig. 7A and Fig. 7B show the test results of the present invention at 354 kHz, wherein Fig. 7A is the forward power and Fig. 7B is the test result of the reflected power.

Figs. 8A and 8B show the results of the test at 652 kHz, wherein Fig. 8A is the forward power and Fig. 8B is the test result of the reflected power.

Fig. 9A and Fig. 9B show the test results of the present invention at 20 kHz, wherein Fig. 9A is the forward power and Fig. 9B is the test result of the reflected power.

101. . . Signal generator

102. . . Power amplifier

103. . . Matching circuit

104. . . Piezoelectric sheet

115. . . Double directional coupler

116. . . Regulator circuit

117. . . Micro-single chip

118. . . LCD screen display device

Claims (3)

An ultrasonic instantaneous power monitoring system with a dual directional coupler, comprising at least: a signal generator, the signal generator can generate a signal; a power amplifier, the power amplifier can amplify a power; a matching circuit; a piezoelectric a dual directional coupler having a power to measure a power variation of the ultrasonic instantaneous power monitoring system; a voltage stabilizing circuit that reduces a voltage, wherein the voltage regulator circuit a micro-single-chip having a function of converting a power measurement signal into an analog signal for measuring an AC/DC current conversion, wherein the micro-single method includes Converting a reflected voltage and an output voltage into a digital signal; converting an AC/DC current; initializing the liquid crystal screen; performing a look-up table inside the micro-single chip, respectively representing a thousandth, a percentile, a decile And the ones are represented as a conversion result; and the conversion result is displayed using a liquid crystal display device to form the micro-single chip And a liquid crystal display device displays a measurement result; wherein the signal generator is connected to the power amplifier, connected to the dual directional coupler, connected to the matching circuit, and connected to the piezoelectric piece, the dual directional coupler is connected to the a micro-single chip, the micro-single chip is respectively connected to the voltage stabilizing circuit, and connected to the liquid crystal display The device is formed to form the ultrasonic instantaneous power monitoring system. The system of claim 1, wherein the method of using the system comprises: generating a input signal by using a signal generator; enhancing the input signal through a power amplifier; and transmitting the input signal to a pair of directional coupling The device performs measurement; transmits the input signal to a matching circuit; and transmits to a piezoelectric sheet to form a method for using the ultrasonic instantaneous power monitoring system. The system of claim 2, wherein the method of using the system comprises: receiving a input signal using a dual directional coupler; transmitting the input signal to a micro-single chip; and transmitting a voltage using a voltage stabilizing circuit To a micro-single chip; processing the input signal using a micro-single chip; and transmitting the input signal to a liquid crystal display device to form a method for using the ultrasonic instantaneous power monitoring system.