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Doppler ultrasonic image-forming system transmitting power supply control apparatus

A technology of power control device and Doppler ultrasound, which is applied in blood flow measurement device, ultrasonic/sonic/infrasonic diagnosis, sonic diagnosis, etc., can solve the problems of inability to isolate power supply noise, slow response of transmitting power supply, etc., to improve safety and stability, reduce the response time, reduce the effect of interference

Inactive Publication Date: 2011-07-20
SHENZHEN LANDWIND IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a Doppler ultrasonic imaging system transmitting power control device, which overcomes the shortcomings of the prior art Doppler ultrasonic imaging system transmitting power that responds slowly during voltage adjustment and cannot be isolated from power supply noise

Method used

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  • Doppler ultrasonic image-forming system transmitting power supply control apparatus
  • Doppler ultrasonic image-forming system transmitting power supply control apparatus
  • Doppler ultrasonic image-forming system transmitting power supply control apparatus

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Embodiment Construction

[0023] Below according to accompanying drawing and embodiment the present invention will be described in further detail:

[0024] Such as figure 1 As shown, the linear voltage regulator (Linear Regulator) works in the saturation region (Saturation) of the regulating transistor, so it changes linearly during the voltage regulation process. This will not cause switching noise in the system like a switching power supply. exist figure 1 Among them, Q1 is an NPN regulating transistor, OPA is an error amplifier, a Zener diode generates a reference voltage Vref, and R1 and R2 form a voltage sampling network. therefore:

[0025] Vout=Vref(1+R2 / R1) (Formula 1)

[0026] According to Formula 1, the voltage output can be adjusted by adjusting the resistance value of the resistor R2.

[0027] Such as figure 2 As shown, the emission power control device of the present invention includes a main controller, a photoelectric isolation relay, a linear voltage regulator and a resistance sa...

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Abstract

The invention discloses an emitting power control device of a Doppler ultrasonic imaging system. The device comprises a master controller, an optical disconnecting relay, a linear voltage regulator and a resistance sampling network. The master controller, the optical disconnecting relay and the resistance sampling network are sequentially connected. The linear voltage regulator is connected with the resistance sampling network. The master controller is used for outputting a make-and-break control signal. The optical disconnecting relay is used for shut-off or break-over based on the make-and-break control signal. The resistance sampling network is used for generating different resistance values when the optical disconnecting relay is shut off or broken over. The linear voltage regulator is used for outputting the voltage with changing linear with the change of the resistance change of the resistance sampling network.

Description

technical field [0001] The invention relates to the technical field of ultrasonic imaging, in particular to a transmission power control device for a Doppler ultrasonic imaging system. Background technique [0002] In the ultrasonic system, by applying a certain voltage to the ultrasonic probe composed of piezoelectric materials, the electrical energy is converted into ultrasonic waves; when the ultrasonic waves propagate in the human body, they will generate reflections on the uneven surfaces between tissues in the body, and by receiving these reflections Echoes can detect conditions inside the human body. [0003] In a common B-mode ultrasound system, the voltage applied to the ultrasound probe is a fixed value; however, in a Doppler ultrasound imaging system, the voltage is usually required to be adjustable. In the process of adjusting and changing the transmission power of the Doppler ultrasound imaging system in the prior art, when the high voltage changes to the low v...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B8/06A61B8/00
Inventor 蒋颂平黄嘉熙兰海李春彬
Owner SHENZHEN LANDWIND IND