CN201073326Y - Vitro blast wave trigger generator - Google Patents

Abstract

The utility model relates to an external impact wave trigger pulse generator, belonging to components of impacting wave source for a stone crusher, which can be used for detecting the trigger signal and outputting a trigger timing circuit controlling pulse connected with a high-voltage ignition pulse circuit which is used for outputting high-voltage ionization current. The utility model can guarantee that each R wave produces synchronous triggering and adapts to a producing source for hydroelectric shock wave and electromagnetic shock wave. The utility model has the advantages of reliable performance and high reliability due to adopting stably controlling current and voltage for the trigger pulse generator, compact size, high efficiency, short and accurate triggering time.

Description

The external knock wave trigger generator

Technical field

This utility model belongs to the assembly of the shock wave source of lithotrite.

Background technology

Extracorporeal shock-wave lithotripsy (ESWL) is to utilize shock wave to produce compressive stress and tension on calculus, makes calculus strip off fragmentation gradually from the surface, then a kind of method for the treatment of urinary system calculus that excretes with the tube chamber system of urine by urinary system.High-tension electricity, big electric current, the moment direct-current discharge of passing through of shock wave is realized.

Shock wave source is the core technology of shock wave stone crusher, and it is determining the effect of calculus pulverizing and the biologically of tissue.At present, the shock wave source of commercialization lithotrite mainly contains two kinds of electrohydraulic type, electromagnetic types.

The source takes place and mainly is made up of three parts in electromagnetic shock-wave: high voltage direct current generator; Trigger generator; Discharge coil.Wherein trigger generator is the important component part in the shock wave source.Trigger generator adopts the power frequency high voltage transformator to trigger at present.This triggering mode volume is big, efficient is low, the pulse of setting out long, the triggered time inaccuracy.Because the generation of shock wave is volatile, not only noise is big, and the High Voltage electric current causes certain danger to patient's heart, must adopt the ecg-r wave triggering to guarantee the safety of patient in the therapeutic process.The high-voltage pulse of the 100Hz of Industrial Frequency Transformer output, therefore each pulse spacing 10ms can not guarantee that each R ripple can both produce synchronous triggering.

Summary of the invention

This utility model provides a kind of external knock wave trigger generator, and the volume that exists at present is big, efficient is low to solve, the pulse of setting out is long, triggered time inaccuracy and the patient is caused the problem of certain danger.The technical scheme that this utility model is taked is: the triggering timing circuit that is used to detect triggering signal and output control pulse is connected with the high tension ignition pulse circuit that is used to export the high pressure ionization electric current.

The utility model has the advantages that: have that volume is little, efficient is high, a pulse ends of setting out, accurate characteristics of triggered time; Can guarantee each R ripple, all can produce synchronously and trigger; Be suitable for hydroelectric shock wave source and electromagnetic shock wave generation source take place.Trigger generator adopts voltage, current stabilization control, stable performance, reliability height.

Description of drawings

Fig. 1 is this utility model theory diagram.

Fig. 2 is this utility model circuit theory diagrams.

The specific embodiment

As Fig. 1, the triggering timing circuit that is used to detect triggering signal and output control pulse is connected with the high tension ignition pulse circuit that is used to export the high pressure ionization electric current.

As Fig. 2, resistance R 1, R2, capacitor C 1, IC 1 constitute the triggering timing circuit.The effect of this circuit is that the rising edge of importing trigger impulse is detected, and exports the burst pulse of certain width simultaneously.This burst pulse control high tension ignition pulse IC circuit 2 makes high tension ignition pulse at the control down-firing that triggers input pulse.Resistance R 1, capacitor C 1 are timing elements, and the width of control impuls and the time constant of timing element are directly proportional.Go into trigger impulse when being low level when output, 1,2,4 feet of IC1 are low level, because 4 feet are low level, so 3 feet are low level.Audion Q1 conducting, the current collection of Q1 is high potential very.3 feet of IC 2 are high potential, and the output of IC2 is blocked, and the high-tension ignition circuit is output not.When the triggering input pulse became high level by low level, 4 feet of IC1 were high level, and 2 and 6 feet are low level, 3 feet output high level, and at this moment, 3 feet of IC2 are low level, and high tension ignition pulse output is arranged.Owing to be input as high level, the input pulse signal gives capacitor C 1 charging by resistance R 1, when the voltage on the C1 rises to 3.3V, and the IC3 output low level, high tension ignition pulse stops.When the triggering input pulse was low level, capacitor C 1 was by resistance R 1 discharge.

The high tension ignition pulse circuit adopts the single-ended reverse exciting boost inverter circuit, and this circuit is made of capacitor C 2, C3, C4, diode D1, D2, IC 2, fet Q2, resistance R 3, R4, R5, R6, R7, R8 and high-tension transformer T1.IC2 and resistance R 5 capacitor C 3 are formed agitator, produce the clock pulses of 50kHz.The output of IC2 drives field effect transistor Q2 by resistance R 6.The current sampling filter circuit that the source current of Q2 constitutes by resistance R 7, R8, capacitor C 4 feeds back to 3 feet of IC2, the operating current of control Q2.The output voltage sample circuit that diode D1, capacitor C 2, resistance R 3, R4 constitute is taken a sample to the drain voltage of Q2, and this voltage is sent into 2 feet of IC2, the drain voltage of control Q2, and according to the principle of transformator, this function has also been controlled ignition voltage simultaneously.In each cycle, the output voltage in previous cycle and the primary coil peak point current that magnetizes is carried out effective PWM and regulates, reach the purpose of regulated output voltage.Transformator T1 rises to 10kV with the 15V supply voltage, is used for ionization and triggers.The effect of diode D2 is that rectification is carried out in output, also the voltage between circuits for triggering and high-voltage capacitance is isolated simultaneously, plays the effect of protection circuits for triggering.

When triggering input pulse, 3 feet of IC2 become low level by high level, 6 feet of IC2 have the pulse output of 50kHz, when 6 feet of IC2 are high level, the Q2 conducting, apply 15V voltage for the primary coil of transformator T1, the primary current of T1 is linear to be increased, and primary current is stored with the magnetic energy form in transformator T1.This is that the voltage that transformator T1 secondary produces makes diode D2 reverse bias.When the 6 feet output of IC2 became low level by high level, Q2 closed.The magnetic energy dispensing of storing among the transformator T1, the high pressure that secondary coil produces makes diode D2 conducting, triggers output current to the gas ionization in the air switch, makes it conducting.

Claims (1)

1. external knock wave trigger generator is characterized in that: the triggering timing circuit that is used to detect triggering signal and output control pulse is connected with the high tension ignition pulse circuit that is used to export the high pressure ionization electric current.

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