CN201361047Y - Doppler ultrasound imaging system emission power supply monitoring device - Google Patents
Doppler ultrasound imaging system emission power supply monitoring device Download PDFInfo
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- CN201361047Y CN201361047Y CNU2008202357704U CN200820235770U CN201361047Y CN 201361047 Y CN201361047 Y CN 201361047Y CN U2008202357704 U CNU2008202357704 U CN U2008202357704U CN 200820235770 U CN200820235770 U CN 200820235770U CN 201361047 Y CN201361047 Y CN 201361047Y
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Abstract
The utility model discloses a Doppler ultrasound imaging system emission power supply monitoring device, which comprises a microprocessor, a first analog-to-digital converter and at least one Hall current sensor, wherein the Hall current sensor is connected with the first analog-to-digital converter, and the first analog-to-digital converter is connected with the microprocessor, and the Hall current sensor is used for measuring the current of an emission power supply of the Doppler ultrasound imaging system and for transmitting relevant voltage signals to the first analog-to-digital converter, and the first analog-to-digital converter converts the voltage signal to a corresponding digital signal and transmits the digital signal to the microprocessor, and the microprocessor stores and processes the digital signal. The Doppler ultrasound imaging system emission power supply monitoring device converts all parameter index values of the Doppler ultrasound imaging system emission power supply to digital signals to be processed, so that the isolation of the circuit is simple, and the varieties of the selective isolation parts are multiple, and the running is reliable, and the power supply monitoring devices are greatly advanced.
Description
Technical field
This utility model relates to circuit monitoring and supersonic imaging apparatus technical field, is specifically related to a kind of transmitting power monitoring device of Doppler ultrasound image-forming system.
Background technology
In ultrasonic system, apply certain voltage by the ultrasonic probe that constitutes to piezoelectric, be ultrasound wave thereby convert electrical energy into mechanical energy; When this ultrasound wave is propagated, produce reflection on the non-uniform face between the tissue in vivo in human body, can survey the distribution situation of the intravital heterogeneous structure of people by receiving these reflection echo signals.Obviously, the intensity of reflection echo signal is relevant with the voltage that is applied, and generally, the voltage that applies is big more, and the ultrasound wave of generation is also just strong more, and the echo-signal of reflection is also just strong more.
In common B pattern ultrasonic system, the voltage that applies ultrasonic probe is a fixed value, so the intensity of echo-signal is only relevant with in-vivo tissue, the degree of depth, if the echo-signal of same area, just only relevant with the degree of depth, the degree of depth is dark more, and echo-signal is weak more; But in Doppler ultrasonic image-forming system, require this emission voltage can regulate variation usually, at this moment, the intensity of echo-signal is not only relevant with in-vivo tissue, the degree of depth, and is also relevant with the size of the voltage that applies.Therefore, the size of currently applied emission voltage need be known, the distribution situation of in-vivo tissue could be constructed according to echo-signal.In addition, now increasing Doppler ultrasonic image-forming system uses ambipolar emission voltage, therefore need monitor positive and negative emission voltage simultaneously.
The utility model content
The technical problems to be solved in the utility model provides a kind of transmitting power monitoring device of Doppler ultrasound image-forming system, various parameter indexs to the Doppler ultrasonic image-forming system emission power are monitored in real time, to guarantee the safe and stable operation of Doppler ultrasonic image-forming system.
This utility model is to solve the problems of the technologies described above the technical scheme that is adopted to be:
A kind of transmitting power monitoring device of Doppler ultrasound image-forming system, comprise microprocessor, first analog-digital converter and at least one Hall current sensor, described Hall current sensor links to each other with first analog-digital converter, first analog-digital converter links to each other with described microprocessor, described Hall current sensor is used for the electric current of Doppler ultrasonic image-forming system emission power is measured and the correspondent voltage signal is passed to first analog-digital converter, first analog-digital converter is converted to digital signal corresponding with described voltage signal and sends to described microprocessor, and described microprocessor is used for described digital signal is stored and handled.
Described transmitting power monitoring device of Doppler ultrasound image-forming system, wherein also comprise at least one digital temperature sensor and isolator, described digital temperature sensor links to each other with described isolator, described isolator links to each other with described microprocessor, described digital temperature sensor is used for the temperature of Doppler ultrasonic image-forming system emission power is measured and digital signal corresponding is sent to described microprocessor, and described isolator is used for digital signal is isolated.
Described transmitting power monitoring device of Doppler ultrasound image-forming system, second resistance and second analog-digital converter that wherein also comprise at least one first resistance and respective numbers, one end of first resistance connects the outfan of each positive supply of Doppler ultrasonic image-forming system emission power, the other end of first resistance connects an end of second resistance, the other end ground connection of second resistance, second analog-digital converter, first resistance is connected with the second resistance copolar, second analog-digital converter links to each other with described microprocessor, and second analog-digital converter is used for voltage signal is converted to digital signal corresponding and sends to described microprocessor.
Described transmitting power monitoring device of Doppler ultrasound image-forming system, the 4th resistance that wherein also comprises at least one the 3rd resistance and respective numbers, one end of the 3rd resistance connects the outfan of each negative supply of Doppler ultrasonic image-forming system emission power, the other end of the 3rd resistance connects an end of the 4th resistance, another termination reference voltage outfan of the 4th resistance, second analog-digital converter, the 3rd resistance and the 4th resistance copolar are connected.
Described transmitting power monitoring device of Doppler ultrasound image-forming system, wherein first analog-digital converter places described microprocessor internal.
Described transmitting power monitoring device of Doppler ultrasound image-forming system, wherein second analog-digital converter places described microprocessor internal.
Described transmitting power monitoring device of Doppler ultrasound image-forming system, wherein said isolator is made as photoelectrical coupler.
Described transmitting power monitoring device of Doppler ultrasound image-forming system, wherein said isolator is made as RF coupler.
Described transmitting power monitoring device of Doppler ultrasound image-forming system, wherein said isolator is made as pulse transformer.
The beneficial effects of the utility model: this utility model transmitting power monitoring device of Doppler ultrasound image-forming system converts all Doppler ultrasonic image-forming system emission power parameter index values to digital signal and handles, thereby circuit is isolated simple, selectable isolating device kind is many, and reliable, not less than a much progress that is electrical power monitoring device.
Description of drawings
This utility model comprises following accompanying drawing:
Fig. 1 is this utility model electrical power monitoring device sketch map;
The Hall current sensor sketch map that Fig. 2 uses for this utility model;
The digital temperature sensor sketch map that Fig. 3 uses for this utility model;
Fig. 4 is used for the resistance connection diagram of voltage measurement for this utility model.
The specific embodiment
With embodiment this utility model is described in further detail with reference to the accompanying drawings below:
As shown in Figure 1, this utility model transmitting power monitoring device of Doppler ultrasound image-forming system comprises microprocessor (MCU), first analog-digital converter (ADC) and at least one Hall current sensor, Hall current sensor links to each other with first analog-digital converter, first analog-digital converter links to each other with microprocessor, Hall current sensor is measured the electric current of Doppler ultrasonic image-forming system emission power and the correspondent voltage signal is passed to first analog-digital converter, first analog-digital converter is converted to voltage signal digital signal corresponding and sends to microprocessor, and microprocessor is stored and handled digital signal.This utility model transmitting power monitoring device of Doppler ultrasound image-forming system also comprises at least one digital temperature sensor and isolator, digital temperature sensor links to each other with isolator, isolator links to each other with microprocessor, digital temperature sensor is measured the temperature of Doppler ultrasonic image-forming system emission power and digital signal corresponding is sent to microprocessor, and isolator is used for digital signal is isolated.This utility model transmitting power monitoring device of Doppler ultrasound image-forming system also comprises second resistance and second analog-digital converter of at least one first resistance and respective numbers, one end of first resistance connects the outfan of each positive supply of Doppler ultrasonic image-forming system emission power, the other end of first resistance connects an end of second resistance, the other end ground connection of second resistance, second analog-digital converter, first resistance is connected with the second resistance copolar, second analog-digital converter links to each other with microprocessor, and second analog-digital converter converts voltage signal digital signal corresponding to and sends to microprocessor.This utility model transmitting power monitoring device of Doppler ultrasound image-forming system also comprises the 4th resistance of at least one the 3rd resistance and respective numbers, one end of the 3rd resistance connects the outfan of each negative supply of Doppler ultrasonic image-forming system emission power, the other end of the 3rd resistance connects an end of the 4th resistance, another termination reference voltage outfan of the 4th resistance, second analog-digital converter, the 3rd resistance and the 4th resistance copolar are connected.
Current measurement
The current signals small resistor (being called sample resistance) of can connecting on power source path by measuring the voltage at small resistor two ends, just can obtain the size of electric current indirectly.But this method makes power supply that a pressure drop be arranged on resistance, and the voltage that causes outputing to transmitting terminal is not the voltage of expection, can cause the image quality decrease of Doppler ultrasonic image-forming system.Therefore need a kind of current signal acquisition mode-Hall current sensor (Hall Current Sensor) that can not exert an influence to supply voltage.
As shown in Figure 2, Hall current sensor is based on Hall effect (Hall Effect).Hall effect has defined the relation between magnetic field and the induced voltage.When electric current by a conductor that is arranged in magnetic field the time, magnetic field can be to horizontal active force of the electron production in the conductor, thereby produces voltage difference at the two ends of conductor.Though this effect is just also understood many years ago as everybody knows, also impracticable before material technology obtains major progress based on the pick off of Hall effect, up to high-intensity constant magnet having occurred and having worked in the circuit for signal conditioning that small voltage is exported.When electric current flows through lead, can produce a magnetic field, this magnetic field is detected by Hall element (Hall Sensor), amplifies magnitude of voltage that is directly proportional with size of current of back output through amplifier.Obvious this method can be not influential to the pressure drop of power supply.When the electric current of positive high voltage power supply or negative high voltage power source was flowed through Hall current sensor, Hall current sensor was just exported a voltage that is directly proportional with current value.And, avoid influencing the picture quality of Doppler ultrasonic image-forming system because the sample resistance of need not connecting also just can not change to supply voltage on current path.Use Hall current sensor to also have an advantage, because this metering system is contactless, make and the highly compressed part and the part of low pressure can be kept apart gauger and measured isolated, in order to avoid high-pressure section is influential to the work of low-pressure section to liking.
Temperature survey
The emission power power of Doppler ultrasonic image-forming system is than higher, and under the PW pattern, emission voltage can reach 80v even go up hectovolt; And under the CW pattern, electric current can reach several amperes.In this case, the caloric value of power supply is bigger, need measure the temperature of power supply, to judge the working condition of power supply, prevents to work under the situation of power supply overload.
As shown in Figure 3, in order to simplify circuit design, this programme adopts digital temperature sensor, because digital temperature sensor does not need other circuit to be used for signal condition or linearizer, can finish the work such as collection, signal condition, digitized of temperature at sensor internal, MCU just can read data with temperature correlation by digital signal interface from pick off.
Voltage measurement
As shown in Figure 1 and Figure 4, the collection of voltage signal can obtain by following method: two resistance series connection backs are linked to each other with tested power supply (these two resistance are called divider resistance), on the junction point of the divider resistance that links to each other, take out voltage signal, by suitable resistance ratio, can realize voltage is dropped to suitable scope, can not produce too big extra power consumption again.
For positive supply, resistance R 01 and R02 are connected between positive supply HVP and the ground GND, then need the voltage VoP that measures just as follows:
For negative supply, general hope transfers it to positive voltage and measures.Resistance R 11 and R12 are connected on negative supply HVN and one with reference between the positive voltage Vref, then need the voltage VoN that measures just as follows:
Formula 2
By selecting suitable resistance R 11 and R12, can make VoN is positive voltage.
Because resistance is connected between power supply and ground or positive reference source and the negative supply, this can increase an extra current drain in addition, and in order to reduce power consumption, will obtaining of these two divider resistances is the bigger the better.But resistance value is big more, and its thermal noise is also just big more, can increase the noise of power supply.Usually, these two divider resistances with the value will be about 100Kohm.
Isolate
As shown in Figure 1, this utility model is provided with the digital signal isolator and comes digital signal is isolated, and selectable isolating device kind is many: photoelectrical coupler, RF coupler and pulse transformer all can be selected to use.Because the employing MCU of monitoring modular as master controller, for preventing to disturb emission power in the MCU work process, needs to use buffer circuit that signal acquisition module and MCU are kept apart.Because use Hall current sensor to carry out current acquisition, itself just has buffer action.And temperature acquisition uses digital temperature sensor, and the isolation of digital signal is to be relatively easy to.But voltage acquisition output is analogue signal, and isolating that analogue signal will can't harm is the comparison difficulty.This programme uses an ADC (Analog-Digital Converter) that analog signal conversion is digital signal, so just can very simply isolate.
As shown in Figure 1, transmitter module is just delivered in the positive and negative power supply regulator circuit adjustment of high voltage power supply input process afterwards.By four component piezoresistances the input and output of positive-negative power are divided to suitable magnitude of voltage, are input to ADC and transfer digital signal to, send into MCU through isolating device again, whether be operated in normal range by these numerical value monitoring power voltages by MCU.And the electric current of positive-negative power obtains being proportional to the voltage output of size of current by the Hall circuit pick off, (can be that MCU is built-in directly to another ADC, also can be external), transfer digital signal to, whether be operated in normal range by these numerical value monitoring power supply electric currents by MCU.The collection of temperature is directly exported and the digital signal of temperature correlation by digital temperature sensor, outputs to MCU by isolated component, supervises empty power supply temperature by MCU whether in normal range of operation by these numerical value.
Those skilled in the art do not break away from essence of the present utility model and spirit, can there be the various deformation scheme to realize this utility model, the above only is the preferable feasible embodiment of this utility model, be not so limit to interest field of the present utility model, the equivalent structure that all utilization this utility model description and accompanying drawing content are done changes, and all is contained within the interest field of the present utility model.
Claims (9)
1, a kind of transmitting power monitoring device of Doppler ultrasound image-forming system, it is characterized in that: comprise microprocessor, first analog-digital converter and at least one Hall current sensor, described Hall current sensor links to each other with first analog-digital converter, first analog-digital converter links to each other with described microprocessor, described Hall current sensor is used for the electric current of Doppler ultrasonic image-forming system emission power is measured and the correspondent voltage signal is passed to first analog-digital converter, first analog-digital converter is converted to digital signal corresponding with described voltage signal and sends to described microprocessor, and described microprocessor is used for described digital signal is stored and handled.
2, transmitting power monitoring device of Doppler ultrasound image-forming system according to claim 1, it is characterized in that: also comprise at least one digital temperature sensor and isolator, described digital temperature sensor links to each other with described isolator, described isolator links to each other with described microprocessor, described digital temperature sensor is used for the temperature of Doppler ultrasonic image-forming system emission power is measured and digital signal corresponding is sent to described microprocessor, and described isolator is used for digital signal is isolated.
3, transmitting power monitoring device of Doppler ultrasound image-forming system according to claim 2, it is characterized in that: second resistance and second analog-digital converter that also comprise at least one first resistance and respective numbers, one end of first resistance connects the outfan of each positive supply of Doppler ultrasonic image-forming system emission power, the other end of first resistance connects an end of second resistance, the other end ground connection of second resistance, second analog-digital converter, first resistance is connected with the second resistance copolar, second analog-digital converter links to each other with described microprocessor, and second analog-digital converter is used for voltage signal is converted to digital signal corresponding and sends to described microprocessor.
4, transmitting power monitoring device of Doppler ultrasound image-forming system according to claim 3, it is characterized in that: the 4th resistance that also comprises at least one the 3rd resistance and respective numbers, one end of the 3rd resistance connects the outfan of each negative supply of Doppler ultrasonic image-forming system emission power, the other end of the 3rd resistance connects an end of the 4th resistance, another termination reference voltage outfan of the 4th resistance, second analog-digital converter, the 3rd resistance and the 4th resistance copolar are connected.
5, transmitting power monitoring device of Doppler ultrasound image-forming system according to claim 4 is characterized in that: first analog-digital converter places described microprocessor internal.
6, transmitting power monitoring device of Doppler ultrasound image-forming system according to claim 5 is characterized in that: second analog-digital converter places described microprocessor internal.
7, transmitting power monitoring device of Doppler ultrasound image-forming system according to claim 6 is characterized in that: described isolator is made as photoelectrical coupler.
8, transmitting power monitoring device of Doppler ultrasound image-forming system according to claim 6 is characterized in that: described isolator is made as RF coupler.
9, transmitting power monitoring device of Doppler ultrasound image-forming system according to claim 6 is characterized in that: described isolator is made as pulse transformer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202357704U CN201361047Y (en) | 2008-12-30 | 2008-12-30 | Doppler ultrasound imaging system emission power supply monitoring device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202357704U CN201361047Y (en) | 2008-12-30 | 2008-12-30 | Doppler ultrasound imaging system emission power supply monitoring device |
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| CN201361047Y true CN201361047Y (en) | 2009-12-16 |
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| CNU2008202357704U Expired - Lifetime CN201361047Y (en) | 2008-12-30 | 2008-12-30 | Doppler ultrasound imaging system emission power supply monitoring device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106821415A (en) * | 2016-12-27 | 2017-06-13 | 吴中区穹窿山德毅新材料技术研究所 | A kind of High Precision Automatic ultrasonic probe of electric motor type |
-
2008
- 2008-12-30 CN CNU2008202357704U patent/CN201361047Y/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106821415A (en) * | 2016-12-27 | 2017-06-13 | 吴中区穹窿山德毅新材料技术研究所 | A kind of High Precision Automatic ultrasonic probe of electric motor type |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20091216 Effective date of abandoning: 20081230 |