CN101726392B - Sinusoid pressure generator with inlet-outlet bidirectional modulation - Google Patents
Sinusoid pressure generator with inlet-outlet bidirectional modulation Download PDFInfo
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- CN101726392B CN101726392B CN2008101672439A CN200810167243A CN101726392B CN 101726392 B CN101726392 B CN 101726392B CN 2008101672439 A CN2008101672439 A CN 2008101672439A CN 200810167243 A CN200810167243 A CN 200810167243A CN 101726392 B CN101726392 B CN 101726392B
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Abstract
The invention belongs to the field of dynamic pressure calibration, in particular to a sinusoid pressure generator with inlet-outlet bidirectional modulation. A rotating wheel is positioned between a shell and a shell cover; an annular cavity is formed between the rotating wheel and the shell cover; circular radial vents communicated with the annular cavity are evenly distributed on the rotating wheel in a circumferential direction; the top of the shell is provided with a sinusoid pressure cavity; the cambered surface of the pressure cavity clings to the outer cambered surface of the rotating wheel; radial square holes communicated with the vents are evenly distributed on an outlet of the pressure cavity; an inlet of the pressure cavity is provided with an air nozzle; a flow regulator is arranged between the air nozzle and the inlets of the square holes; a cylindrical pressure generating cavity is arranged at the center of the square holes; and pressure sensor mounting through holes communicated with the pressure generating cavity are symmetrically arranged on both sides of the square holes. The generator extends calibration frequency range of a sinusoid dynamic pressure calibration device, greatly improves sinusoidal pressure waveforms generated by the sinusoid dynamic pressure generator and improves static-dynamic amplitude ratio of the sinusoid dynamic pressure waveforms.
Description
Technical field
The invention belongs to dynamic pressure calibration field, be specifically related to a kind of sinusoid pressure generator with inlet-outlet bidirectional modulation.
Background technology
Along with science and technology development, in Aero-Space, weapons, nuclear industry and automobile and other industries, in technical fields such as hydrostatic control, engine and blast, need a large amount of dynamic pressures is measured, be accurately dynamic pressure is just measured and must be calibrated the dynamic perfromance of the pressure transducer that uses in the measuring process.Sinusoid pressure generator with inlet-outlet bidirectional modulation is the core component that is used for the sinusoidal dynamic pressure calibrating installation of pressure transducer dynamic perfromance calibration.
At present, fixed volume variable-quality sinusoidal pressure generator all is to adopt a kind of in two kinds of structures illustrated in figures 1 and 2.Fig. 1 is an inlet modulation sinusoidal pressure generator, and Fig. 2 is an outlet modulation sinusoidal pressure generator.In Fig. 1, gas nozzle 10 is relative with the inlet in sinusoidal pressure chamber 11, swiveling wheel 5 with holes is between the inlet in gas nozzle 10 and sinusoidal pressure chamber 8, swiveling wheel 5 is a disk with holes, the identical circular hole of processing equal and opposite in direction spacing on the disk, the inlet of pressure chamber 8 is a square hole, and the length of side is identical with Circularhole diameter on the disk.When disk rotates, the gaseous mass that enters pressure chamber 8 inlet by admission piece is controlled by area change between disk hole and the pressure chamber inlet to be sinusoidal rule to change, make pressure chamber 8 interior gaseous tensions change by sinusoidal rule, the standard transducer of installing in pressure chamber 8 symmetria bilateralis 6 and will be subjected to the effect of same change pressure by school sensor 12 can reach by the purpose of correction force transducer 12 calibrations by standard of comparison pressure transducer 6 with by the output of correction force transducer 12 response.What Fig. 2 was different with Fig. 1 is that rotating circular disk has been installed between the outlet and exhaust nozzle of pressure chamber 8, and require the outlet of pressure chamber 8 this moment is square hole.
The disk circular hole is inswept pressure chamber 8 gas accesses or outlet synoptic diagram are as shown in Figure 3.Obtain good sine wave, the circular hole 32 on the swiveling wheel 5 is answered the inswept vent port 7 of level, and for this reason, disc radius r should be big as far as possible, and there is following shortcoming in this structure:
(1) disc radius r can not be infinitely great, so waveform distortion is bigger;
(2) because disc radius r is bigger, and disk is stressed to be axial force, vertical with disk plane, the working pressure of generator is restricted;
(3) because technologic problem makes the gap difficulty between disk and the pressure chamber control, because, when disk diameter is big, to guarantee that not only disc surfaces is very smooth, and to guarantee that disk is very steady in operation process, have difficulty on technology, this is restricted generator frequency of operation lower limit.
Summary of the invention
The object of the present invention is to provide a kind of sinusoid pressure generator with inlet-outlet bidirectional modulation, this sinusoidal pressure generator has been expanded the calibration frequency scope of sinusoidal dynamic pressure calibrating installation, improved the sinusoidal pressure waveform that sinusoidal dynamic pressure generator is produced greatly, improved the sound amplitude ratio of sinusoidal dynamic pressure waveform, reduce sinusoidal dynamic pressure waveform distortion, improved the meter characteristic and the calibration range of sinusoidal dynamic pressure calibrating installation.
Realize the object of the invention technical scheme: a kind of sinusoid pressure generator with inlet-outlet bidirectional modulation, it comprises discoidal swiveling wheel, sinusoidal pressure cavity and is positioned at the air nozzle of sinusoidal pressure cavity porch, wherein, the center of swiveling wheel is a cylindrical cavity, one end of swiveling wheel is provided with annular groove, the annular groove outside is provided with annular boss, and along circumferentially even several circular row pores that distribute of annular boss, the circular row pore is a radial direction through hole; The sinusoidal pressure cavity is a cube, and the top, middle part of sinusoidal pressure cavity is provided with boss, and the bottom, middle part of sinusoidal pressure cavity is provided with boss, and the bottom surface of boss is and the suitable cambered surface of swiveling wheel cambered surface that the cambered surface of boss is close to the cambered surface of swiveling wheel; Sinusoidal pressure cavity middle part is provided with the sinusoidal pressure generation cavity, and the sinusoidal pressure generation cavity is a cylindrical cavity, the axis parallel of this cylindrical cavity axle center and swiveling wheel, and the left and right sides of cylindrical cavity is respectively equipped with pressure transducer through hole is installed; Be provided with the exhaust square hole in the sinusoidal pressure cavity, the width of exhaust square hole is identical with the circular row hole diameter, and the center cross-sectional of exhaust square hole is on same plane, the exhaust square hole is identical with the spacing of circular row pore with the exhaust square hole, the spacing of exhaust square hole and exhaust square hole becomes the integral multiple relation with the spacing of circular row pore, the spacing of gas square hole and exhaust square hole becomes integral multiple relation with the spacing of circular row pore, the exhaust square hole, radially run through the sinusoidal pressure generation cavity along the sinusoidal pressure generation cavity; Swiveling wheel forms toroidal cavity between the annular groove of swiveling wheel and the shell body lid between main shell body and shell body lid; The main shell body with between the sinusoidal pressure cavity at its top, fixedly connected; Be provided with throttle regulator between air nozzle and the sinusoidal pressure generation cavity, throttle regulator is a right cylinder, be provided with groove in the middle of this right cylinder bottom, cylindrical sidewall be arranged with axially tiltedly groove,, tiltedly groove and oblique groove are axis of symmetry with cylindrical axle center, and the cross section by oblique groove and oblique groove center on the right cylinder is trapezoidal; Be provided with power transmission shaft in the cylindrical cavity of swiveling wheel, and swiveling wheel is connected by the swiveling wheel key with power transmission shaft, the end of power transmission shaft is passed through the powered drive wheel key and is connected with powered drive wheel, and powered drive wheel passes through driving belt, is connected with motor.
Described shell body lid end is connected with the noise reduction lid, forms cylindrical cavity between shell body lid and the noise reduction lid, circumferentially evenly is provided with several axially extending bores along the shell body lid, and the bottom of noise reduction lid is provided with the noise reduction exhaust hole.
Described main shell body and shell body lid are fixed on the supporting plate.
Technique effect of the present invention: (1) with circular hole design at swiveling wheel radially makes that the circular hole relative motion is linear change on pressure chamber exhaust square hole and the swiveling wheel, thereby has improved the degree of distortion of sine pressure wave.(2) because swiveling wheel radially bears gaseous tension, improved the working pressure of generator.(3) structural design of four vent ports of pressure chamber has realized importing and exporting the purpose of modulated pressure size simultaneously, has improved the sound amplitude ratio of sinusoidal pressure, has further improved the waveform distortion of sinusoidal pressure simultaneously.(4) increasing air-flow modulation part makes the pressure waveform modulation become convenient, easy.
Description of drawings
Fig. 1 is the unidirectional modulation sinusoidal pressure of an inlet of the prior art generator architecture synoptic diagram;
Fig. 2 is the unidirectional modulation sinusoidal pressure of an outlet of the prior art generator architecture synoptic diagram;
Fig. 3 is unidirectional modulation sinusoidal pressure generator swiveling wheel disk hole of the prior art and pressure chamber gas access, outlet variation relation synoptic diagram;
Fig. 4 is the synoptic diagram of the main cut-open view of sinusoid pressure generator with inlet-outlet bidirectional modulation provided by the present invention;
Fig. 5 is the synoptic diagram of the A-A of Fig. 2 to cut-open view;
Fig. 6 is the synoptic diagram with the front view of the swiveling wheel of equidistant circular hole;
Fig. 7 is the synoptic diagram with the left view of the swiveling wheel of equidistant circular hole;
Fig. 8 be the sinusoidal pressure cavity with respect to the synoptic diagram of Fig. 5 front view;
Fig. 9 is the synoptic diagram of the vertical view of Fig. 8;
Figure 10 is the synoptic diagram of the B-B of Fig. 8 to cut-open view;
The synoptic diagram of the structural representation of Figure 11 air damper;
Figure 12 is that the C-C of Figure 11 is to cut-open view;
Figure 13 is the principle schematic of sinusoid pressure generator with inlet-outlet bidirectional modulation provided by the present invention.
Among the figure: the 1st, the powered drive wheel key; The 2nd, powered drive wheel; 3, the 23, the 26th, bearing; The 4th, the main shell body; The 5th, swiveling wheel; 6, the 12nd, pressure transducer is installed through hole; The 7th, the circular row pore on the swiveling wheel; The 8th, the sinusoidal pressure cavity; The 9th, air damper; The 10th, air nozzle; The 11st, the sinusoidal pressure generation cavity; The 13rd, the shell body lid; The 14th, the swiveling wheel key; The 15th, Adjusting bolt Adjusting screw; The 16th, the noise reduction lid; 17, the 18th, the noise reduction exhaust hole; The 19th, set nut; 20, the 22nd, driving belt; 21 powered drive wheels; 24, the 27,29, the 30th, gib screw; The 25th, power transmission shaft; The 28th, supporting plate; 31, the 32,33, the 34th, sinusoidal pressure cavity vent port; The 35th, setting nut; The 36th, bearing cap; The 37th, toroidal cavity; The 38th, through hole; The 39th, cylindrical cavity; The 40th, boss; The 41st, annular groove, the 42nd, keyway; The 43rd, cylindrical cavity; 44, the 45th, circular hole; 46, the 47th, boss; The 48th, groove, the 49, the 50th, oblique groove.D is an airintake direction; E is a discharge directions; F is a swiveling wheel direction of motion; M is the gas direction of exerting pressure; N is a swiveling wheel direction of motion sense of rotation.
Embodiment
Below in conjunction with drawings and Examples a kind of sinusoid pressure generator with inlet-outlet bidirectional modulation provided by the present invention is described in further detail.
As shown in Figure 4 and Figure 5, a kind of sinusoid pressure generator with inlet-outlet bidirectional modulation, it comprises powered drive wheel key 1, powered drive wheel 2, main shell body 4, swiveling wheel 5, sinusoidal pressure cavity 8, air damper 9, air nozzle 10, shell body lid 13, swiveling wheel key 14, Adjusting bolt Adjusting screw 15, noise reduction lid 16, set nut 19,21 powered drive wheels, power transmission shaft 25, supporting plate 28, setting nut 35, bearing cap 36 and driving belt 20,22.
As shown in Figure 6 and Figure 7, the center of disc swiveling wheel 5 is a cylindrical cavity 42, and an end of swiveling wheel 5 is provided with annular groove 41, and annular groove 41 outsides are provided with annular boss 40, along circumferentially even several circular row pores 7 that distribute of annular boss 40, circular row pore 7 is a radial direction through hole.
As Fig. 8 and shown in Figure 9, sinusoidal pressure cavity 8 is a cube, and the top, middle part of sinusoidal pressure cavity 8 is provided with boss 46, and the bottom, middle part of sinusoidal pressure cavity 8 is provided with boss 47.As shown in Figure 5, the bottom surface of boss 47 is and the suitable cambered surface of swiveling wheel 5 cambered surfaces that the cambered surface of boss 47 is close to the cambered surface of swiveling wheel 5.Sinusoidal pressure cavity 8 middle parts are provided with sinusoidal pressure generation cavity 11, and sinusoidal pressure generation cavity 11 is a cylindrical cavity.As shown in Figure 4, the axis parallel of this cylindrical cavity axle center and swiveling wheel 5, the left and right sides of cylindrical cavity is respectively equipped with pressure transducer through hole 6,12 is installed.Pressure transducer mounting hole 6,12 is a square opening.
As Fig. 5, Fig. 8 and shown in Figure 9, be provided with exhaust square hole 31,32,33,34 in the sinusoidal pressure cavity 8, exhaust square hole 31,32,33,34 is a through hole, the width of exhaust square hole 31,32,33,34 is identical with circular row pore 7 diameters, and the center cross-sectional of exhaust square hole 31,32,33,34 is on same plane.Exhaust square hole 32 is identical with the spacing of circular row pore 7 with exhaust square hole 33.The spacing of exhaust square hole 31 and exhaust square hole 32 becomes integral multiple relation with the spacing of circular row pore 7, for example, the spacing of exhaust square hole 31 and exhaust square hole 32 can be the twice of circular row pore 7 spacings or three times.The spacing of exhaust square hole 33 and exhaust square hole 34 becomes integral multiple relation with the spacing of circular row pore 7, for example, exhaust square hole 33 and exhaust square hole 34 spacings can be the twice of circular row pore 7 spacings or three times. Exhaust square hole 32,33 radially runs through sinusoidal pressure generation cavity 11 along sinusoidal pressure generation cavity 11.
As shown in Figure 4 and Figure 5, swiveling wheel 5 forms toroidal cavity 37 between the annular groove 41 of swiveling wheel 5 and the shell body lid 13 between main shell body 4 and shell body lid 13.Sinusoidal pressure cavity 8 two ends are provided with circular hole 44,45, are provided with screw 29 in the circular hole 44, are provided with screw 30 in the circular hole 45, main shell body 4 with between the sinusoidal pressure cavity 8 at its top, fixedly connected by screw 29,30.Be provided with throttle regulator 9 between air nozzle 10 and the sinusoidal pressure generation cavity 11.As Figure 11 and shown in Figure 12, throttle regulator 9 is a right cylinder, the middle groove 48 that is provided with in this right cylinder bottom, and cylindrical sidewall is arranged with axially tiltedly groove 49,50, and tiltedly groove 49 and oblique groove 50 are axis of symmetry with cylindrical axle center; Cross section by oblique groove 49 and oblique groove 50 centers on the right cylinder is trapezoidal.
As shown in Figure 4, be provided with power transmission shaft 25 in the cylindrical cavity 42 of swiveling wheel 5, and swiveling wheel 5 is connected with power transmission shaft 25 by swiveling wheel key 14, the end of power transmission shaft 25 is connected with powered drive wheel 2 by powered drive wheel key 1, and powered drive wheel 2 passes through driving belt 20,22 and is connected with motor.Main shell body 4 and shell body lid 13 all are enclosed within power transmission shaft 25, are provided with bearing 3,23 between main shell body 4 and the power transmission shaft 25, are provided with bearing 26 between shell body lid 13 and the power transmission shaft 25, and bearing 26 is between swiveling wheel 5 ends and Adjusting bolt Adjusting screw 15.The end of main shell body 4 is provided with bearing cap 36, is provided with setting nut 35 in the bearing cap 36.The end of powered drive wheel 2 is provided with set nut 19.Shell body covers 13 the other end and covers 16 by being threaded with noise reduction, form cylindrical cavity 39 between shell body lid 13 and the noise reduction lid 16, circumferentially evenly be provided with several axially extending bores 38 along shell body lid 13, the bottom of noise reduction lid 16 is provided with noise reduction exhaust hole 17,18, and sound exhaust hole 17 and noise reduction exhaust hole 18 are that the center is symmetrically distributed with the axle center of noise reduction lid 16.Main shell body 4 is fixed on supporting plate 28 by screw 24, and shell body lid 13 is fixed on the supporting plate 28 by screw 27.
Powered drive wheel 2 links to each other with motor by driving belt 20,22 and realizes the transmission of power, and powered drive wheel is that integrated big or small wheel of 2.5:1 formed by diameter proportion, can change the rotational speed of generator easily.
3,23 on 36 pairs of bearings of bearing cap are put the dirt protective effect.Main shell body 4 is main support bodies of whole forcing function generator, and swiveling wheel 5 is played sealing and main support effect.Shell body 13 is also born the part supporting role except that swiveling wheel 5 is play the seal protection effect.Reconcile the adjusting that nut 35 is realized the elasticity of bearing 3; The elasticity of Adjusting bolt Adjusting screw 15 adjustable bearings 26, noise reduction lid 16 also has the proofing dust and protecting effect except that playing when high frequency, the high pressure the sound deadening.28 pairs of whole forcing function generators of supporting plate play a supportive role.
As Fig. 1 and shown in Figure 13, the principle of work of a sinusoid pressure generator with inlet-outlet bidirectional modulation provided by the present invention: standard pressure transducer is installed in pressure transducer installs in the through hole 6, tested pressure transducer is installed in pressure transducer to be installed in the through hole 12, starter motor, motor drives powered drive wheel 2 by driving belt 20,22 and rotates, thereby powered drive wheel 2 rotates by power transmission shaft 25 driven rotary wheel 5.Gases at high pressure spray to air damper 9 by air nozzle 10, under the effect of air damper 9 gas in proportion a part flow to sinusoidal pressure chamber 11 and flow to swiveling wheel 5 by square hole 32,33, another part flows to swiveling wheel 5 by hole 31,34, standard pressure transducer and tested pressure transducer are installed in pressure transducer respectively through hole 6,12 places are installed, and form sinusoidal pressure in the sinusoidal pressure chamber 11 between the pressure transducer that symmetry is installed under the effect of swiveling wheel 5.Because square hole 31,34 with square hole 32,33 duties are identical and synchronous, the circular row pore 7 on swiveling wheel 5 and the square hole 31 of pressure chamber, 32,33, the pressure in sinusoidal pressure chamber 11 was identical with admission pressure when 34 dislocation were closed, the circular row pore 7 on swiveling wheel 5 and the square hole 31 of pressure chamber, 32,33, the pressure in sinusoidal pressure chamber 11 was in minimum point when 34 alignment were opened, regulate modulation hole 31 by air damper 9,34 air capacity can realize the sound amplitude ratio of gaseous tension in the offset of sinusoidal pressure chamber and the adjustment of wave form distortion size with the ratio of the tolerance that enters sinusoidal pressure chamber 11, makes this generator reach optimum Working.Be with equally spaced swiveling wheel 5 to be subjected to radial air flow pressure, quiescent operation pressure improves greatly.Can reach the purpose that pressure transducer is calibrated by the output of comparing two pressure transducers.
Claims (3)
1. sinusoid pressure generator with inlet-outlet bidirectional modulation, it comprises discoidal swiveling wheel (5), sinusoidal pressure cavity (8) and is positioned at the air nozzle (10) of sinusoidal pressure cavity (8) porch, it is characterized in that: the center of swiveling wheel (5) is cylindrical cavity (42), one end of swiveling wheel (5) is provided with annular groove (41), annular groove (41) outside is provided with annular boss (40), along circumferentially even several circular row pores (7) that distribute of annular boss (40), circular row pore (7) is a radial direction through hole; Sinusoidal pressure cavity (8) is a cube, the top, middle part of sinusoidal pressure cavity (8) is provided with first boss (46), the bottom, middle part of sinusoidal pressure cavity (8) is provided with second boss (47), the bottom surface of second boss (47) is and the suitable cambered surface of swiveling wheel (5) cambered surface that the cambered surface of second boss (47) is close to the cambered surface of swiveling wheel (5); Sinusoidal pressure cavity (8) middle part is provided with sinusoidal pressure generation cavity (11), sinusoidal pressure generation cavity (11) is a cylindrical cavity, the axis parallel of this cylindrical cavity axle center and swiveling wheel (5), the left and right sides of this cylindrical cavity are respectively equipped with pressure transducer through hole (6), (12) are installed; Be provided with four exhaust square holes (31 in the sinusoidal pressure cavity (8), 32,33,34), four exhaust square holes (31,32,33,34) be through hole, four exhaust square holes (31,32,33,34) width is identical with circular row pore (7) diameter, and four exhaust square holes (31,32,33,34) center cross-sectional is on same plane, the second exhaust square hole (32) is identical with the spacing of circular row pore (7) with the 3rd exhaust square hole (33), the spacing of the first exhaust square hole (31) and the second exhaust square hole (32) becomes the integral multiple relation with the spacing of circular row pore (7), the spacing of the 3rd exhaust square hole (33) and the 4th exhaust square hole (34) becomes integral multiple relation with the spacing of circular row pore (7), the second exhaust square hole (32) and the 3rd exhaust square hole (33) radially run through sinusoidal pressure generation cavity (11) along sinusoidal pressure generation cavity (11); Swiveling wheel (5) is positioned between main shell body (4) and the shell body lid (13), forms toroidal cavity (37) between the annular groove (41) of swiveling wheel (5) and the shell body lid (13); Fixedly connected between main shell body (4) and the sinusoidal pressure cavity (8) that is positioned at its top; Be provided with throttle regulator (9) between air nozzle (10) and the sinusoidal pressure generation cavity (11), throttle regulator (9) is a right cylinder, be provided with groove (48) in the middle of this right cylinder bottom, cylindrical sidewall is arranged with the axial first oblique groove (49), the second oblique groove (50), the first oblique groove (49) and the second oblique groove (50) are axis of symmetry with cylindrical axle center, and the cross section by the first oblique groove (49) and second oblique groove (50) center on the right cylinder is trapezoidal; Be provided with power transmission shaft (25) in the cylindrical cavity (42) of swiveling wheel (5), and swiveling wheel (5) is connected with power transmission shaft (25) by swiveling wheel key (14), the end of power transmission shaft (25) is connected with powered drive wheel (2) by powered drive wheel key (1), and powered drive wheel (2) is connected with motor by driving belt (20), (22).
2. a kind of sinusoid pressure generator with inlet-outlet bidirectional modulation according to claim 1 and 2, it is characterized in that: described shell body lid (13) end is connected with noise reduction lid (16), form cylindrical cavity (39) between shell body lid (13) and the noise reduction lid (16), circumferentially evenly be provided with several axially extending bores (38) along shell body lid (13), the bottom of noise reduction lid (16) is provided with noise reduction exhaust hole (17), (18).
3. a kind of sinusoid pressure generator with inlet-outlet bidirectional modulation according to claim 1 and 2 is characterized in that: described main shell body (4) and shell body lid (13) are fixed on the supporting plate (28).
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| CN2008101672439A CN101726392B (en) | 2008-10-16 | 2008-10-16 | Sinusoid pressure generator with inlet-outlet bidirectional modulation |
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| CN2008101672439A CN101726392B (en) | 2008-10-16 | 2008-10-16 | Sinusoid pressure generator with inlet-outlet bidirectional modulation |
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| CN101726392B true CN101726392B (en) | 2011-01-19 |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101979980B (en) * | 2010-10-20 | 2012-01-25 | 北京航天计量测试技术研究所 | Sinusoidal pressure generation chamber with filter characteristics |
| CN103398051B (en) * | 2013-07-15 | 2016-01-20 | 中国航天科技集团公司第六研究院第十一研究所 | A kind of sinusoid high frequency oscillation experimental setup of step-less adjustment |
| CN104330210A (en) * | 2014-10-30 | 2015-02-04 | 北京航天计量测试技术研究所 | Square wave pressure generator in porous turning wheel structure |
| CN107655627B (en) * | 2017-11-09 | 2023-08-11 | 上海市计量测试技术研究院 | Sinusoidal pressure generating device |
| CN108534940B (en) * | 2018-05-14 | 2020-06-19 | 西安交通大学 | Device and method for measuring axial force of rotor of double-screw compressor |
| CN110296791B (en) * | 2019-07-15 | 2020-12-11 | 中国航空工业集团公司北京长城计量测试技术研究所 | Sinusoidal pressure generating device with stepless adjustable outlet displacement |
| CN111735569B (en) * | 2020-07-09 | 2021-07-30 | 昆山双桥传感器测控技术有限公司 | Sine pressure hydraulic pushing device and working method |
| CN112304490B (en) * | 2020-10-26 | 2021-11-30 | 中国航空工业集团公司北京长城计量测试技术研究所 | Modulation type combined sinusoidal pressure cavity |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2280899Y (en) * | 1996-08-15 | 1998-05-06 | 黄德珠 | Pressure sensor with automatic gas-complementing and gas-discharging device |
| DE102004021058A1 (en) * | 2003-05-01 | 2004-11-18 | Harmonic Drive Systems Inc. | Rotation angle measurement arrangement for a gear shaft device determines its angular position based on the output of three torque sensors that generate phase-shifted sinusoidal signals that are processed by a signal processor |
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2008
- 2008-10-16 CN CN2008101672439A patent/CN101726392B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2280899Y (en) * | 1996-08-15 | 1998-05-06 | 黄德珠 | Pressure sensor with automatic gas-complementing and gas-discharging device |
| DE102004021058A1 (en) * | 2003-05-01 | 2004-11-18 | Harmonic Drive Systems Inc. | Rotation angle measurement arrangement for a gear shaft device determines its angular position based on the output of three torque sensors that generate phase-shifted sinusoidal signals that are processed by a signal processor |
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