CN1057107A - Ultrasonic power meter - Google Patents
Ultrasonic power meter Download PDFInfo
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- CN1057107A CN1057107A CN 90103840 CN90103840A CN1057107A CN 1057107 A CN1057107 A CN 1057107A CN 90103840 CN90103840 CN 90103840 CN 90103840 A CN90103840 A CN 90103840A CN 1057107 A CN1057107 A CN 1057107A
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Abstract
The present invention is a kind of instrument that can measure ultrasonic power.For solving the laterally mobile and inclination of moving part in the measurement mechanism, on the basis of original measurement mechanism, increased and to have formed by V-reed and pull spring etc., two groups of same structures are up and down arranged, and be the paralleling rotary guide mechanism of parallel assembling each other, control laterally moving and inclination of its force cell movable device, also be provided with sound field real-time temperature probe, eliminate of the influence of acoustic field medium temperature variation measuring accuracy.Be used in combination microcomputer, can directly measure small ultrasonic value and various ultrasound parameter, this instrument energy bidirectional measurement is used calibration of weight, and is highly sensitive.
Description
The present invention relates to a kind of ultrasonic power measurement instrument, be applicable to the measurement of ultrasonic power and correlation parameter, be particularly suitable for medical domain as the transmission of quantity value standard.
Existing ultrasonic power meter generally adopts the force balance type radiation pressure method, and for example world patent WO-8601889 utilizes the electromagnetic force compensation principle exactly, adopts " radiation power measurement means " of electromagnetic levitation type structure.It is made up of permanent magnet, absorption sound target, reflecting wall water receptacle, aqueous medium, electromagnet, differential transformer type balanced detector and servo circuit.Its cylindrical permanent magnet becomes to be rigidly connected with target, movable device as force cell, be immersed in the container of transaudient aqueous medium, signal acts on the absorption sound target during measurement, make moving part produce downward displacement, then the differential transformer type balanced detector has signal output, and this signal is after servo circuit is regulated, export a feedback current and give magnet spool, electromagnet just produces an additional force.If its sense of current and size make permanent magnet opposite with the direction that tested radiant force acts on power on the absorption sound target to the force direction that solenoid produces, equal and opposite in direction just can make movable device set back.The size of feedback signal promptly reflects the value of tested radiant force.The weak point of this measurement mechanism is the movable device owing to absorption sound target and permanent magnet composition, causes laterally moving and inclination of target when measuring easily, measures sensitivity thereby influence, and the sound field temperature effect of transaudient aqueous medium influences the precision of measurement result.
The objective of the invention is to propose a kind of novel ultrasonic power meter, it can overcome movable device laterally moving and inclination when measuring, and revises transaudient aqueous medium Temperature Influence, improves and measures sensitivity and precision.
The object of the present invention is achieved like this: for addressing the above problem ultrasonic power meter of the present invention is on the basis of " radiation power measurement means ", increased the composite elastic component structure of forming by elastic spring and pull spring, paralleling rotary guide mechanism as the control movable device, make movable device can not occur laterally moving and tilting, have only moving axially of one dimension.One end of the elastic spring of this mechanism is fixed on the connecting rod of movable device, and the other end is fixed in the middle part of pull spring, and the two ends of pull spring are fixed on the pull spring frame.In addition, adopt differential photoelectricity balance detection to replace the differential transformer type balance detection.Measure in the water receptacle and insert temperature probe, can reflect of the influence of aqueous medium temperature in real time, make to adapt to the wide range of temperature of acoustic field medium, for the ultrasound parameter measurements and calculations provide foundation to measuring.
Advantage of the present invention is: highly sensitive, resolution reaches 0.1 milliwatt, but the little ultrasonic value of micrometer reaches 1 milliwatt, and is reliable and stable, measuring accuracy height, and the multiple correlation parameter of energy measurement.
Accompanying drawing of the present invention has:
Fig. 1 ultrasonic power meter block scheme
Fig. 2 ultrasonic power flowmeter sensor synoptic diagram
Fig. 3 ultrasonic power flowmeter sensor paralleling rotary guide mechanism synoptic diagram
Fig. 4 ultrasonic power meter circuit theory diagrams
Below in conjunction with drawings and Examples the present invention is further described.
Ultrasonic power meter of the present invention also is the compensation principle that utilizes electromagnetic force, the ultrasonic power measuring device of electromagnetic levitation type structure.
Ultrasonic power meter is made up of sensor and circuit two parts, Fig. 1 is the ultrasonic power meter block scheme, sensor comprises force cell 1 and temperature probe 2, and circuit comprises that differential amplifier 3, prime amplifier 4, current amplifier 5, proportion integration differentiation network 6(are called for short PID network 6), temperature measurement signal amplifier 7, program-controlled electronic switch 8, A/D converter 9, single card microcomputer 10, keyboard 11 and display 12.
Fig. 2 is a ultrasonic power flowmeter sensor synoptic diagram.It comprises force cell 1 and temperature probe 2, and force cell 1 adopts the floated structure of electromagnetic force, and it is made up of magnetic circuit system, movable device, paralleling rotary guide mechanism and infrared differential balance detecting device.Magnetic circuit system is made up of annular permanent magnet 13, pole shoe 14 and yoke 15.Movable device is by center-pole 16, and coil 17, coil former 18 and Force receiver are formed.The center-pole 16 of movable device is a non-magnetic insulating material, center-pole 16 passes the central passage of annular permanent magnet 13, pole shoe 14 and yoke 15, the coil former 18 that has coil 17 is installed on the center-pole 16, coil 17 is arranged in the magnetic air gap of pole shoe 14 and yoke 15 formation, Force receiver is contained in an end of center-pole 16, and center-pole 16 must not contact with annular permanent magnet 13, pole shoe 14, yoke 15 with coil 17.For this reason, increased the paralleling rotary guide mechanism that links to each other with movable device in the force cell 1 of the present invention, center-pole 16 links to each other with paralleling rotary guide mechanism.There is a scale pan 19 upper end of center-pole 16, and there is a sound reception target 20 lower end.The center-pole 16 of movable device is affixed with the V-type elastic spring 21 of paralleling rotary guide mechanism.Paralleling rotary guide mechanism is referring to Fig. 3, two groups of identical structures up and down arranged, and be parallel assembling each other, and they are by two V-type elastic springs 21 up and down, two groups of pull springs 22 and pull spring frame 23, pull spring frame pedestal 24 are formed up and down.The toe end of two V-type elastic springs 21 is fixed on the center-pole 16 up and down, and the bipod of its V-type elastic spring 21 is fixed in the middle part of pull spring 22 respectively, and the two ends of pull spring 22 are separately fixed on the pull spring frame 23, and pull spring frame 23 is fixed on the pull spring frame pedestal 24.Infrared differential balance detecting device by infraluminescence pipe 25, block diaphragm 26, differential photoelectric cell 27 is formed, and blocks diaphragm 26 and also is fixed on the center-pole 16, its effect is blocking the variation of diaphragm 26 positions, controls the variation of differential photoelectric cell 27 outputs.Magnetic circuit system is fixed on the force cell supporting plate 29 by pillar 28, and pull spring frame pedestal 24, infraluminescence pipe 25 and the differential photoelectric cell 27 etc. of paralleling rotary guide mechanism all are fixed on the force cell supporting plate 29.Force cell 1 is placed in the cylindrical shell measuring vessel 30 by supporting plate 29, supporting plate 29 is positioned at the middle part of measuring vessel 30, measuring vessel 30 is divided into two parts up and down, the magnetic circuit system of force cell 1, movable device, paralleling rotary guide mechanism and infrared differential balance detecting device are positioned at measuring vessel 30 tops, sound reception target 20 is positioned at the bottom, movable device center-pole 16 passes the center pit of supporting plate 29, make sound reception target 20 be positioned at target chamber 31, be covered with sound absorption lining 32 around target chamber 31 inwalls, be full of degassing distilled water in the target chamber 31 as sound bearing medium, also optional other sound bearing medium.The bottom centre of target chamber 31 has coupling window over against sound reception target 20, and coupling window has sound passing membrane 33.Measuring vessel 30 bottoms are supported with three measuring vessel legs 34.Loam cake 35 is arranged at measuring vessel 30 tops, and loam cake 35 center opened round mouths are so that put into scale pan 19 with counterweight.Temperature probe 2 is an integrated temperature measuring head, places in the target chamber 31 of measuring vessel 30.
Fig. 4 is the ultrasonic power meter circuit theory diagrams.Circuit comprises coil 17, differential photoelectric cell 27, temperature probe 2, differential amplifier 3, prime amplifier 4, current amplifier 5, PID network 6, temperature measurement signal amplifier 7 and signal processing circuit.Differential amplifier 3 adopts operational amplifier A 1 and resistance R 1, R2, R3, R4 and R5 form, prime amplifier 4, current amplifier 5 and PID network 6 are formed the power servomechanism, prime amplifier 4 is by operational amplifier A 2, resistance R 6 and R7 form, current amplifier 5 is by transistor T1 and T2, resistance R 8, R9 and sampling resistor R10 form, PID network 6 is proportion integration differentiation network commonly used, it is by resistance R 11, R12, R13, R14 and capacitor C 1, C2 forms, temperature probe 2 adopts integrated temperature measuring head, and temperature measurement signal amplifier 7 adopts operational amplifier A 3, resistance R 15, R16, R17, R18 forms.Above-mentioned operational amplifier A 1, A2 and A3 adopt integrated circuit 7650, and transistor T1 and T2 adopt 3DG6 and 3DG130 respectively, and signal processing circuit comprises program-controlled electronic switch 8, A/D converter 9, single card microcomputer 10, keyboard 11 and display 12.Program-controlled electronic switch 8 is selected C544 for use, and A/D converter 9 is selected 14433 A/D converters for use, and single card microcomputer 10 is selected 8048 series boards machines for use, and display 12 is selected four CL102 displays for use, and keyboard 11 is selected the Small Universal keyboard for use.
The course of work of ultrasonic power meter is:
Force cell 1 is to be in vertical placement, utilizes the electromagnetic force compensation principle, the electromagnetic levitation type arrangement works.When coil 17 is not switched on, Force receiver (comprising scale pan 19 harmony receiving targets 20) is not subjected to external force and does the time spent, movable device make it be sunken to the bottom from gravity.When coil 17 energisings, and Force receiver still is not subjected to external force and does the time spent, movable device is except that being subjected to self-gravity action, be subjected to the effect of the electromagnetic force of coil 17 energising back generations again, if the size of current of flowing through coil 17 and direction make the magnetic field of coil 17 generations and the FR of annular permanent magnet 13, the upwards electromagnetic force that movable device is subjected to equate from gravity, make movable device be in suspended state.This moment, movable device was stablized motionless, the differential photoelectric cell 27 of infrared differential balance detecting device is output as zero, paralleling rotary guide mechanism also is in steady state (SS) (being that the moment of reaction equals zero), this state is the original state of force cell 1, and this moment, the electric current of coil 17 suspended states was decided to be zero current.When being subjected to external force, Force receiver does the time spent, movable device just has micro-displacement, drive is blocked diaphragm 26 and is produced corresponding displacement, because blocking the mobile of diaphragm 26 makes the luminous flux that infraluminescence pipe 25 incides on the differential photoelectric cell 27 lose original symmetry, so differential electrical signals of differential photoelectric cell 27 outputs, this signal is after differential amplifier 3, prime amplifier 4 and current amplifier 5 amplify, its output is divided into two-way, one the tunnel feeds back to the input end of prime amplifier 4 through PID network 6, improves the loop dynamic transient process.The compensation current feedback on another road is returned the coil 17 of movable device.The electromagnetic force that offset current produces resets movable device, reaches new dynamic balance, has promptly finished the closed loop follow-up adjustment process of electromagnetic force equilibrium.The size of offset current has reflected measured size, by being connected on the sampling resistor R10 in current amplifier 5 circuit, can obtain with by the output of the corresponding electric signal of dynamometry, this signal is delivered to signal processing circuit.Utilize the temperature of temperature probe 2 real-time detection aqueous medium sound fields simultaneously, also this signal is delivered to signal processing circuit, to being that each ultrasound parameter of independent variable calculates demonstration with the temperature.Like this, this instrument just can be realized the ultrasound parameter measurement of wide range of temperature.Signal processing circuit is delivered on the output signal of power servomechanism and that road of temperature measurement signal amplifier 7 output signals, and display 12 shows that value of ultrasonic power, average sound intensity, the velocity of sound, sound field temperature and power value all is the control that is subjected to keyboard 11, program-controlled electronic switch 8 and single card microcomputer 10.
Owing to adopt the movable device of the composite structure flexible member of V-type elastic spring 21 and pull spring 22, thereby the moment of reaction that produces is very little, almost level off to zero, again since movable device be fixed on the property reed 21 of two V-types up and down, when movable device is subjected to displacement under the measured signal effect, do not relatively move between them, avoid rubbing to measuring the influence of sensitivity, laterally moving and tilting can not appear in movable device yet, have only moving axially of one dimension, guarantee the stability of movable device, thereby further improved measurement sensitivity.
Force receiver comprises scale pan 19 harmony receiving targets 20, is installed in the two ends of movable device center-pole 16, and ultrasonic power meter can be realized two-way detection, utilizes sound reception target 20 to carry out the detection of ultrasonic signal parameter, utilizes scale pan 19 to carry out force measurement.So, ultrasonic power meter of the present invention can utilize counterweight to calibrate.The intelligent degree height of data processing and measurement.
Claims (3)
1, a kind of ultrasonic power meter, usually form by sensor and circuit two parts, sensor adopts the floated force cell 1 of electromagnetic force, it is by magnetic circuit system, movable device and infrared differential balance detecting device are formed, magnetic circuit system is by annular permanent magnet 13, pole shoe 14 and yoke 15 are formed, movable device is by center-pole 16, coil 17, coil former 18 and Force receiver are formed, the center-pole 16 of movable device passes annular permanent magnet 13, the central passage of pole shoe 14 and yoke 15, the coil former 18 that has coil 17 is installed on the center-pole 16, coil 17 is arranged in the magnetic air gap of pole shoe 14 and yoke 15 formation, Force receiver is contained in an end of center-pole 16, circuit comprises differential amplifier 3, prime amplifier 4, current amplifier 5, proportion integration differentiation network 6, program-controlled electronic switch 8, A/D converter 9, single card microcomputer 10, keyboard 11 and display 12, the invention is characterized in: increased the paralleling rotary guide mechanism that links to each other with movable device in the force cell 1, paralleling rotary guide mechanism has two groups of identical structures up and down, and be parallel assembling each other, they are by two V-type elastic springs 21 up and down, two groups of pull springs 22 and pull spring frame 23 up and down, pull spring frame pedestal 24 is formed, the tip of two V-type elastic springs 21 is fixed on the center-pole 16 up and down, the bipod of its V-type elastic spring 21 is fixed in the middle part of pull spring 22 respectively, the two ends of pull spring 22 are separately fixed on the pull spring frame 23, and pull spring frame 23 is fixed on the pull spring frame pedestal 24.
2, ultrasonic power meter according to claim 1 is characterized in that increasing the temperature probe 2 and the temperature measurement signal amplifier 7 thereof of real-time measurement sound field aqueous medium temperature.
3, ultrasonic power meter according to claim 1 is characterized in that above-mentioned Force receiver is the scale pan 19 harmony receiving targets 20 that are installed in movable device center-pole 16 two ends.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90103840 CN1025973C (en) | 1990-05-31 | 1990-05-31 | Ultrasonic power meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90103840 CN1025973C (en) | 1990-05-31 | 1990-05-31 | Ultrasonic power meter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1057107A true CN1057107A (en) | 1991-12-18 |
| CN1025973C CN1025973C (en) | 1994-09-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 90103840 Expired - Fee Related CN1025973C (en) | 1990-05-31 | 1990-05-31 | Ultrasonic power meter |
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| Country | Link |
|---|---|
| CN (1) | CN1025973C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007025437A1 (en) * | 2005-09-02 | 2007-03-08 | Chongqing Haifu (Hifu) Technology Co., Ltd. | An ultrasound power measuring device |
| WO2011103780A1 (en) * | 2010-02-26 | 2011-09-01 | 南京海克医疗设备有限公司 | Absorption target for measuring power of high-intensity focused ultrasound |
| CN104236693A (en) * | 2014-08-21 | 2014-12-24 | 中国船舶重工集团公司第七一五研究所 | Device and method for measuring ultrasonic power in half-noise-elimination water tank |
-
1990
- 1990-05-31 CN CN 90103840 patent/CN1025973C/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007025437A1 (en) * | 2005-09-02 | 2007-03-08 | Chongqing Haifu (Hifu) Technology Co., Ltd. | An ultrasound power measuring device |
| CN100437053C (en) * | 2005-09-02 | 2008-11-26 | 重庆海扶(Hifu)技术有限公司 | Ultrasonic power measuring device |
| WO2011103780A1 (en) * | 2010-02-26 | 2011-09-01 | 南京海克医疗设备有限公司 | Absorption target for measuring power of high-intensity focused ultrasound |
| AU2011220262B2 (en) * | 2010-02-26 | 2013-05-09 | Chengdu Heuk Medical Equipment Co., Ltd | Absorption target for measuring power of high-intensity focused ultrasound |
| AU2011220262C1 (en) * | 2010-02-26 | 2013-10-31 | Chengdu Heuk Medical Equipment Co., Ltd | Absorption target for measuring power of high-intensity focused ultrasound |
| US8863577B2 (en) | 2010-02-26 | 2014-10-21 | Nanjing Haike Medical Equipment Co., Ltd. | Absorption target for measuring power of high-intensity focused ultrasound |
| CN104236693A (en) * | 2014-08-21 | 2014-12-24 | 中国船舶重工集团公司第七一五研究所 | Device and method for measuring ultrasonic power in half-noise-elimination water tank |
| CN104236693B (en) * | 2014-08-21 | 2017-02-22 | 中国船舶重工集团公司第七一五研究所 | Device and method for measuring ultrasonic power in half-noise-elimination water tank |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1025973C (en) | 1994-09-21 |
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