CN202133920U - Ultrasonic wave frequency control voltage generator - Google Patents

Abstract

The utility model discloses an ultrasonic wave frequency control voltage generator applied to the cutting field of composite materials, which solves the problem that the ultrasonic wave cutting efficiency and the machining precision are influenced by the wide detuning work frequency of an ultrasonic wave energy transducer. The ultrasonic wave frequency control voltage generator comprises a sampling amplification circuit, an RC high-pass circuit, a rectification filter circuit, an oscillation circuit and a subtraction circuit. When an ultrasonic wave energy transducer is in detuning operation at a frequency far away from a resonant frequency point, the signal of the ultrasonic wave energy transducer is converted into a corresponding DC signal through the sampling amplification circuit, the RC high-pass circuit and the rectification filter circuit. The oscillation circuit generates a reference signal approximately equal to the resonant frequency of the energy transducer and the reference signal is converted into another corresponding DC signal through the RC high-pass circuit and the rectification filter circuit. The frequency of the output signal of a VCO is controlled to approach the frequency of the reference signal by the error voltage signals of the two DC signals control after being subjected to the subtraction operation. Therefore, the energy transducer is operated at a frequency in the vicinity of the resonant frequency point. The ultrasonic wave frequency control voltage generator has good economic benefit and popularization using value.

Description

Ultrasonic frequency control voltage generator

Technical field

The compound substance cutting

Background technology

The ultrasound wave cutting processing technology of compound substance is high, effective and well received with its high-level efficiency, precision.At present, the ultrasonic cutting machine in the market often adopts the electric current loop mode to lock the frequency of operation of ultrasonic transducer, and the oscillator of ultrasonic cutting machine is in free-runing operation, and its frequency of operation is by the electric current and voltage closed-loop control.In aforesaid way, when load variations or external interference, normal efficient and the machining precision that influences the ultrasound wave cutting because of ultrasonic transducer off resonance operating frequency range is wide.In order to have reduced the influence of load variations and external interference to the ultrasound wave cutting, improve the performance index of cutting machine, improve machining precision, answer design of High Efficiency ultrasonic frequency control system.For this reason, this patent provides the ultrasonic frequency control that is used for ultrasonic frequency control system voltage generator.

Summary of the invention

Ultrasonic frequency control voltage generator; It is an important component part of efficient ultrasonic frequency control system; It can make the ultrasonic frequency control system be operated near the ultrasonic transducer resonant frequency point, and then improves the efficient and the machining precision of ultrasonic cutting machine.

The technological hardware solution of this patent is: constituted this ultrasonic frequency control voltage generator by sampling amplifying circuit, RC high pass circuit, current rectifying and wave filtering circuit, parallel connection type quartz crystal oscillator circuit, subtraction circuit etc.Ultrasonic frequency control voltage generator; A part is to be linked in sequence by sampling amplifying circuit, RC high pass circuit I, current rectifying and wave filtering circuit I, subtraction circuit; Another part is to be linked in sequence by parallel connection type quartz crystal vibrating circuit, RC high pass circuit II, current rectifying and wave filtering circuit II, subtraction circuit; It is characterized in that: sampled signal converts a corresponding direct current signal into behind sampling amplifying circuit, RC high pass circuit I, current rectifying and wave filtering circuit I; The reference signal that oscillatory circuit produces converts another corresponding direct current signal into behind RC high pass circuit II, current rectifying and wave filtering circuit II, the output signal frequency of the error voltage signal may command voltage controlled oscillator VCO that two direct current signals produce through the subtraction circuit computing to reference signal frequency near.

The principle of work of this ultrasonic frequency control voltage generator is: when ultrasonic transducer when working away from the resonant frequency point off resonance; Signal on the ultrasonic transducer is sampled and amplify by the sampling amplifying circuit; Signal after the amplification is sent into behind the RC high pass circuit in the current rectifying and wave filtering circuit again, through becoming a corresponding d. c. voltage signal behind the rectifying and wave-filtering; Simultaneously, the parallel connection type quartz crystal oscillator circuit produces the reference signal that approximates the ultrasonic transducer resonance frequency, and reference signal is sent in the current rectifying and wave filtering circuit behind the RC high pass circuit again, through becoming another corresponding d. c. voltage signal behind the rectifying and wave-filtering; Two d. c. voltage signals are given subtraction circuit simultaneously, and behind subtraction, the error voltage signal of output is given voltage controlled oscillator VCO, control voltage controlled oscillator VCO output signal frequency to reference signal frequency near; The output signal of voltage controlled oscillator VCO is given ultrasonic transducer after driving circuit Driver amplifies, the duty that makes ultrasonic transducer to the resonance duty near, ultrasonic transducer is worked near resonant frequency point.

The beneficial effect of this patent is: this ultrasonic frequency control voltage generator has advantage simple in structure, easy to maintenance, that cost performance is high; It is operated in closed loop, the efficient stable zone ultrasonic frequency control system; Improved the performance index of ultrasonic cutting machine, made ultrasonic cutting machine have good machining precision.Therefore, this patent possesses certain application value, can produce good economic benefit and social benefit.

Description of drawings

Fig. 1 is the circuit theory diagrams of the utility model.

In Fig. 1, VCO is a voltage controlled oscillator, and Driver is a driving circuit, XTAL ₁Be ultrasonic transducer.

Embodiment

In Fig. 1; Circuit bank becomes explanation as follows: ultrasonic frequency control voltage generator, form by sampling amplifying circuit, RC high pass circuit I, current rectifying and wave filtering circuit I, parallel connection type quartz crystal vibrating circuit, RC high pass circuit II, current rectifying and wave filtering circuit II, subtraction circuit etc.Wherein, the sampling amplifying circuit is by integrated transporting discharging IC _1-1And resistance R ₁, R ₂, R ₃Constitute, RC high pass circuit I is by resistance R ₄And capacitor C ₁Constitute, current rectifying and wave filtering circuit I is by commutation diode D ₁With filter capacitor C ₂Constitute, the parallel connection type quartz crystal oscillator circuit is by integrated transporting discharging IC _1-2, capacitor C ₃, C ₄, C ₅And quartz crystal XTAL ₂Constitute, RC high pass circuit II is by resistance R ₉And capacitor C ₆Constitute, current rectifying and wave filtering circuit II is by commutation diode D ₂With filter capacitor C ₇Constitute, subtraction circuit is by integrated transporting discharging IC _1-3And resistance R ₅, R ₆, R ₇, R ₈Constitute.

In Fig. 1, the circuit connection description is following: resistance R ₁One termination ultrasonic transducer XTAL ₁One end and integrated transporting discharging IC _1-1Pin 3, other end ground connection.Integrated transporting discharging IC _1-1Pin 3 connecting resistance R ₁With meet ultrasonic transducer XTAL ₁IC _1-1Pin two connecting resistance R ₂, R ₃An end, resistance R ₂Other end ground connection, resistance R ₃Another termination IC _1-1Pin one and capacitor C ₁One end, IC _1-1Pin one connecting resistance R ₃One end and capacitor C ₁One end, capacitor C ₁Other end connecting resistance R ₄One end and diode D ₁Anode, resistance R ₄Other end ground connection, diode D ₁Negative electrode connects capacitor C ₂One end and resistance R ₅One end, capacitor C ₂Other end ground connection, resistance R ₅Another termination integrated transporting discharging IC _1-3Pin one 0 and resistance R ₆One end, resistance R ₆Other end ground connection.Integrated transporting discharging IC _1-2Pin 5 ground connection, connect capacitor C simultaneously ₃, C ₄An end, capacitor C ₃Another termination IC _1-2Pin 7 and capacitor C ₅, C ₆An end, capacitor C ₄Another termination IC _1-2Pin 6 and quartz crystal XTAL ₂One end.IC _1-2Pin 6 connect capacitor C ₄One end and quartz crystal XTAL ₂One end.IC _1-2Pin 7 connect capacitor C ₃, C ₅, C ₆An end.Capacitor C ₅One termination IC _1-2Pin 7 and capacitor C ₃, C ₆An end, another termination quartz crystal XTAL ₂One end.Capacitor C ₆One termination IC _1-2Pin 7 and capacitor C ₃, C ₅An end, other end connecting resistance R ₉One end and diode D ₂Anode, resistance R ₉Other end ground connection, diode D ₂Negative electrode connects capacitor C ₇One end and resistance R ₇One end, capacitor C ₇Other end ground connection, resistance R ₇Another termination integrated transporting discharging IC _1-3Pin 9 and resistance R ₈One end, resistance R ₈Another termination IC _1-3Pin 8 and the input end IN of voltage controlled oscillator VCO ₁IC _1-3Pin 9 connecting resistance R ₈, R ₉An end, IC _1-3Pin one 0 connecting resistance R ₅, R ₆An end, IC _1-3Pin 7 meet the input end IN of voltage controlled oscillator VCO ₁The output terminal OUT of voltage controlled oscillator VCO ₁Meet the input end IN of driving circuit Driver ₂, the output terminal OUT of driving circuit Driver ₂Meet ultrasonic transducer XTAL ₁One end.+ V _CCBe positive source, GND is the earth terminal of power supply.

In Fig. 1, the circuit working principle is following: when ultrasonic transducer when working away from the resonant frequency point off resonance, resistance R ₁To ultrasonic transducer XTAL ₁On signal sample, obtain sampled signal and pass through resistance R ₁Deliver to integrated transporting discharging IC _1-1Pin 3, promptly deliver to by integrated transporting discharging IC _1-1And resistance R ₁, R ₂, R ₃In the in-phase proportion amplifying circuit that is constituted, after sampled signal was amplified through the in-phase proportion amplifying circuit, the amplifying signal of generation was by integrated transporting discharging IC _1-1Pin one output.Integrated transporting discharging IC _1-1The signal that pin one is exported is through resistance R ₄And capacitor C ₁Behind the RC high pass circuit I that is constituted, deliver to diode D again ₁And capacitor C ₂Among the current rectifying and wave filtering circuit I that is constituted, through converting corresponding d. c. voltage signal u behind the rectifying and wave-filtering into _I1Simultaneously, by integrated transporting discharging IC _1-2, quartz crystal XTAL ₂, capacitor C ₃, C ₄, C ₅The parallel connection type quartz crystal oscillator circuit that is constituted produces the reference signal that approximates the ultrasonic transducer resonance frequency, and reference signal is by integrated transporting discharging IC _1-2Pin 7 be transported to resistance R ₉And capacitor C ₆Behind the RC high pass circuit II that is constituted, deliver to diode D again ₂And capacitor C ₇Among the current rectifying and wave filtering circuit II that is constituted, through converting corresponding d. c. voltage signal u behind the rectifying and wave-filtering into _I2D. c. voltage signal u _I1And u _I2As two input signals of subtraction circuit, deliver to simultaneously by integrated transporting discharging IC _1-3And resistance R ₅, R ₆, R ₇, R ₈In the subtraction circuit that is constituted, u _I1And u _I2After subtraction circuit computing amplification, the error voltage signal of generation is by integrated transporting discharging IC _1-3Pin 8 deliver to the input end IN of voltage controlled oscillator VCO ₁, control VCO output signal frequency to reference signal frequency near, the output signal of voltage controlled oscillator VCO is by its output terminal OUT ₁Deliver to the input end IN of driving circuit Driver ₂, Driver amplifies through driving circuit, and the output signal of driving circuit Driver is by its output terminal OUT ₂Deliver to ultrasonic transducer XTAL ₁, so just make ultrasonic transducer XTAL ₁Duty to the resonance duty near, ultrasonic transducer is worked near resonant frequency point.

Claims (1)

1. ultrasonic frequency controls voltage generator; A part is to be linked in sequence by sampling amplifying circuit, RC high pass circuit I, current rectifying and wave filtering circuit I, subtraction circuit; Another part is to be linked in sequence by parallel connection type quartz crystal vibrating circuit, RC high pass circuit II, current rectifying and wave filtering circuit II, subtraction circuit; It is characterized in that: sampled signal converts a corresponding direct current signal into behind sampling amplifying circuit, RC high pass circuit I, current rectifying and wave filtering circuit I; The reference signal that oscillatory circuit produces converts another corresponding direct current signal into behind RC high pass circuit II, current rectifying and wave filtering circuit II, the output signal frequency of the error voltage signal may command voltage controlled oscillator VCO that two direct current signals produce through the subtraction circuit computing to reference signal frequency near.

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