JPS5837793A - Digital high frequency output gage for ultrasonic wave oscillator - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention The present invention provides ultrasonic processing, ultrasonic cleaning, ultrasonic cell disruption,
This paper relates to a digital high-frequency output meter included in an ultrasonic oscillator that is widely used for ultrasonic exploration and detection.

In order to measure the power consumption of an ultrasonic oscillator's transducer, conventionally it was necessary to equip an expensive power meter that used a thermocouple or an analog multiplier, and since the analog display was based on a pointer, there were many reading errors. Ta.

The present invention aims to provide a digital high-frequency output meter for an ultrasonic oscillator that uses a microcomputer and is processed by a program without using any conventional wattmeter circuit.

An embodiment of the invention will be described with reference to FIG.

The ultrasonic oscillator A equipped with the present invention inputs an analog adjustment voltage value signal s1 and converts it into VOO(VOLTAGIOON).
an operating unit B that outputs an amplified excitation signal Bm obtained by amplifying the power of an excitation signal output that has been controllably converted to the required oscillation frequency f1 using a power amplifier l; The amplified excitation signal Ss is received by the matching transformer/≠ and the ultrasonic transducer/l is transmitted to the resonance frequency f! A vibration system C outputs an analog AC high-frequency current value signal B4 flowing through the ultrasonic transducer L through a known fixed resistor R+, and a D/A converter/D/A converter/D/A converter/D/A converter. J' converts the nine analog adjusted voltage value signals 81 and outputs them to the operation unit B, and at the same time, the analog AC high frequency current value signal S4 is directly inputted from the vibration system C.
The analog DC high frequency current value signal Be' rectified by the rectifier 20 is converted into a digital high frequency current value signal By by the A/D converter 22 upon reception of the operation timing command signal 60.
The conversion and transmission section converts and outputs the data to '!1, and sequentially inputs the data from the conversion and transmission section through the digital interface 2≠ to RAM (RAN-I)OM Acomss uzM.
oRy ) 2 Digital high frequency current value signal 8? stored at a predetermined designated address of t? ' in advance in ROM (REA
CPU (cv
NTRhLpRocxssENG UNIT) 30
Perform successive approximation processing and use the resonant frequency of the ultrasonic transducer! A digital adjustment voltage value signal Sg that is output when a drop in the digital high-frequency current value signal 8' due to fluctuation is detected.
The maximum digital high frequency current value signal 8? is forcefully swept up or down little by little and obtained each time? ' by storing it in a predetermined designated address of the RAM 26, the resonance frequency f1 fluctuation of the ultrasonic transducer/6 is continuously monitored, and the digital adjustment voltage value signal 8s calculated by tracking it is sent to the digital interface 21I-. It consists of a microcomputer-X which outputs data to a direct conversion transmission section.

Further, the microcomputer-E receives a clock pulse signal SL from a separately connected clock pulse oscillator 3-.
When + is input and the CPU 30 counts up the preset value on the attached digital switch 36, it sends the oscillator stop command signal 8 to the power amplifier/J of the operation unit B, thereby starting the oscillation. This is done by programming the timer function to stop.

Therefore, the digital high frequency output meter of the present invention has a microcomputer
Analog multiplexer 3≠ equipped with a contact P that selectively connects one of the current detection side input terminal T1, the voltage detection/output side input terminal T2, and the output terminal Ts in response to the switching selection timing command signal 8+o from In pre-installing, the analog AC high frequency current value signal 84 flowing through the ultrasonic transducer/6 is connected to the current detection side input terminal T+ via a known fixed resistor Rt, and is newly connected in series to the ultrasonic transducer/6. The analog AC high frequency voltage value signal So outputted from the resistance connection point N of the known partial voltage fixed resistors - and Rs constituting the voltage divider 3g is sent to the voltage detection side input terminal T! The output terminal Ts is connected to a rectifier 20, and a digital display +0 using a light emitting diode (LKD) is attached to a microcomputer E via a digital interface 2≠.

Since the present invention is configured as described above, the ultrasonic oscillator A is operated by the analog multiplexer that the cPU 30 passes through the digital interface 2 in accordance with the program stored in the ROM 21 of the microcomputer E.
When the switching selection timing command signal 8+o is issued at 31/-, the contact P switches to the current detection side input terminal T+ and connects the analog AC high frequency current value signal 4 flowing to the ultrasonic transducer/6 through the fixed resistor R1. On the way, it is input to the rectifier O in the conversion and transmission section via an analog multiplexer 34t and rectified into an analog DC high frequency current value signal Sa', and then the analog DC high frequency current value signal 86' is sent to the CPU 30.
The digital high-frequency current value signal By is converted by the A/D converter λλ in response to the reception of the operation timing command signal SO via the digital interface J4'.
' is stored in a predetermined address of RAM A 6 through the digital interface 244 of the microphone cuco/viewer E, and at the same time, the switching selection timing command signal Sho outputted through the digital interface 24t by the command operation of the CPU 30 causes the analog multiplexer 34 to be stored.
4 contact P instantly switches to the voltage detection side input terminal TI, applies it to the ultrasonic transducer L, and sets the fixed resistance R and the fixed resistance R.
An analog AC high frequency voltage value signal S which is a voltage component divided by s.

is input to the rectifier 20 in the conversion/transmission section through an analog multiplexer 34t on the way, and rectified into an analog DC high frequency voltage value signal 86''.Subsequently, the analog DC high frequency voltage value signal 66'' is input to the digital interface by command operation of the CjPU 30. 211-, the digital high-frequency voltage value signal 1'' converted by the Jv converter 22 is passed through the digital interface 2≠ of the microcomputer-E and specified in the RAM 26. When stored in the address, the ROM2t
The digital high-frequency current value signal B read out from the RAM 26 by the CPU 26 according to the multiplication formula stored in advance.
The value obtained by multiplying q' by the digital high-frequency voltage value signal 87'' and further by a correction coefficient stored in advance in the ROM 2 t is displayed on the digital display ≠O by a command from the CPU JO.

By performing the above series of operations moment by moment, the output power of the ultrasonic transducer/6 can be read while the ultrasonic oscillator A is in operation.

Thus, in the present invention, there is no special wattmeter circuit, and since this is programmed, there is no need for conventionally used expensive thermocouples or analog multipliers, and reading errors are almost eliminated. A microcomputer is also used to process the digital power value signal afterward.
It has excellent effects such as being able to directly process input data.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing the configuration of an ultrasonic oscillator equipped with a digital high-frequency output meter according to the present invention. A... Ultrasonic oscillator C... Vibration system D... Conversion transmission section E... Microcomputer-R1...
Fixed resistance R2, Rs...divided voltage fixed resistance Elo...
・Operation timing command signal S4...Analog AC high frequency current value signal 86'...
Analog DC high frequency current value signal 86''...Analog DC high frequency voltage value signal 87'...Digital high frequency current value signal S?''...Digital high frequency voltage value signal Sho...
・Switching selection timing command signal/B... Ultrasonic vibrator 2Q... Rectifier 3≠... Analog multiplexer

Claims (1)

[Claims] 1. A vibration system that outputs an analog high-frequency current value signal and an analog high-frequency voltage value signal related to an ultrasonic vibrator, and switching the analog high-frequency current value signal and analog high-frequency voltage value signal from the vibration system. a conversion transmission section that selectively inputs and digitally converts the signals according to a selection timing command signal and outputs a digital high-frequency current value signal and a digital high-frequency voltage value signal; and the digital high-frequency current value signal input from the conversion and transmission section and stored. and a microcomputer that multiplies the digital high-frequency voltage value signals according to a pre-stored program, further multiplies them by a correction coefficient, outputs and displays the values on a digital display, and outputs the switching selection timing command signal. Digital high-frequency output needle 2 for ultrasonic oscillator The vibration system has a circuit configuration in which the current detection side is connected to a known fixed resistor, and the voltage detection side is connected to a voltage divider so that the output can be freely output to a conversion transmission unit. Digital high frequency output needle 1 for ultrasonic oscillator described in paragraph 1 The conversion transmission unit receives a switching selection timing command signal from a microcomputer between an analog AC high frequency current value signal and an analog AC high frequency voltage value signal from the vibration system. and an analog multiplexer that selectively switches and inputs the analog AC high frequency current value signal and the analog AC high frequency voltage value signal that have passed through the analog multiplexer into an analog DC high frequency current value signal and an analog DC high frequency voltage value signal. A multi-circuit including a rectifier that rectifies each, and an A/D converter that converts and outputs the analog DC high frequency current value signal and analog DC high frequency voltage value signal from the rectifier into a digital high frequency current value signal and a digital high frequency voltage value signal, respectively. A digital high-frequency output meter for an ultrasonic oscillator according to claim 1 or 2, comprising: