CN1357743A - Displacement sensor - Google Patents
Displacement sensor Download PDFInfo
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- CN1357743A CN1357743A CN 01142990 CN01142990A CN1357743A CN 1357743 A CN1357743 A CN 1357743A CN 01142990 CN01142990 CN 01142990 CN 01142990 A CN01142990 A CN 01142990A CN 1357743 A CN1357743 A CN 1357743A
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- vibrating reed
- displacement
- upper shell
- reinforcement plate
- magnetic component
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- Measuring Fluid Pressure (AREA)
- Geophysics And Detection Of Objects (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
- Control Of Washing Machine And Dryer (AREA)
- Pressure Sensors (AREA)
Abstract
A displacement sensor provided with a displacement detecting section includes: a upper case; a screw section and a bolt shaped cylindric magnetic member moveable along the axis direction of an oscillation coil which are bolted to the top of the upper case; an oscillation coil supported by a vibrating reed reinforcing plate with its winding holes corresponding the lower wall of the magnetic member; a vibrating reed reinforcing plate which is interlocked with a vibrating reed and moveable along the axis direction of an oscillation coil in the upper case; a compressing screw spring for elastically forcing the upper case and the vibrating reed reinforcing plate; a circle vibrating reed which is provided below the vibrating reed reinforcing plate between the upper case and the lower case, making axis direction displacement of the oscillation coil under the gas pressure in a compressing chamber; a lower case engaged with the upper case, composing the compressing chamber with the vibrating reed. The purpose of present invention is to absorb gas pressure alteration caused by swinging, adjust the initial oscillation frequency without mounting additional components, and detect a micro gas pressure only by removing the compressing screw spring.
Description
Technical field
The invention relates to LC oscillatory type displacement transducer, the gaseous tension that will import the compression chamber that is made of lower house and soft start member (such as crust of weathering body, vibrating reed) converts the displacement of this softness start member to, and displacement conversion that should softness start member is frequency and does square wave oscillation output.Specifically, relate to the improvement of sensitivity (resolution characteristic) of improvement, frequency inverted of improvement, micro pressure gas pressure detection of improvement, recycle of adjustment of improvement, the initial oscillation of the absorption of the gaseous tension change that the swing vibration etc. of household electrical appliance that displacement transducer is housed etc. produced.
Background technology
All the time, for (for example being located at the choke box in the washing machine sink in the measuring object chamber of detecting air pressure, with the isopressor pump chamber of air pump, the passage of being installed on the air outlet of air washer and air conditioner etc.) gaseous tension and use displacement transducer, and this displacement transducer is installed in (such as automatic washing machine on the household electrical appliance, dish-washing machine, the nilas body, suction cleaner, electric cooker, humidifier, air freshener, air-conditioning, air bed, the pneumatic massage chair, the dry air generating means, the anion air generating means, the tank micro-bubble generation device, full-automatic bathtub, the bathtub bubble generator, air pump applied for machines such as used in dustless room pressed air supplying device; Forced air supply mode water electrolysis formula ozone generating-device; Water electrolysis formula chlorine generating means; The supply pressure pick-up unit of inflammable gass such as LP gas, coal gas and rock gas; Combustion air feedwaies such as fan heating element) etc., the electric property energising that is used for household electrical appliance etc. plus-minus pressure-controlled, air-supply control, feedwater (oil) control and/or the flow control etc. of control, supply gas (air) pressure that have a power failure.
For example the special fair 5-28771 communique of Jap.P., practical new No. 3044686 communique of case of registration, United States Patent (USP) No. 5760577 communique, spy open 2000-283871 communique etc. and disclose LC oscillatory type displacement transducer 10, be the air in the choke box to be compressed by the water level that the washing machine sink is supplied with, and this gaseous tension guided to compression chamber, be converted to the vibrating reed displacement, and be frequency with this vibrating reed displacement conversion, do square wave oscillation output.
Formation (hardware) as the displacement detecting portion of above-mentioned displacement transducer 10 as Figure 13 and shown in Figure 14, is provided with: upper shell ester moulding members such as (such as etc.) PP resins 70 of threaded portion 76 is arranged at top; The compression helical spring that is bolted on this upper shell 70 is adjusted screw 71; Have the coiling hole and be fixed on oscillator coil 88 on the upper shell 70 with this coiling hole state relative with magnetic component 85 peristomes; Be bearing in the hollow cylindrical magnetic component (magnetic ferrites magnetic core) 85 on the vibrating reed reinforcement plate 84; Can with the displacement interlock of vibrating reed 83, the vibration reinforcement plate 84 that moves along the direction of principal axis of this vibrator coil 88 in this upper shell 70 (contacts, breaks away from oscillator coil 88.Also can as the spy open flat 11-23394 communique, spy open 2000-19048 communique etc. disclosed, be not provided with as the member class especially in an occasion that only constitutes with magnetic component); All the time compression helical spring is adjusted the compression helical spring 87 of screw 71 and vibrating reed reinforcement plate 84 (or magnetic component 85) elastic stressing; According to the gaseous tension of compression chamber 82 and along the direction of principal axis displacement of oscillator coil 88, be equipped on this vibrating reed reinforcement plate 84 bottoms, be sandwiched in the circular vibrating reed (soft rubber, horminess metal plate) 83 of 80 of upper shell 70 and lower houses; 70 chimeric with upper shell, gas introduction port 81 arranged, constitute the lower house (as ester moulding members such as PP resins etc.) 80 of compression chambers 82 with vibrating reed 83.
The inductance of establishing oscillator coil 88 when employing is when to be L, resonance with the electric capacity of capacitor 89 (preferably nonpolarity) be the mediation oscillatory circuit (mode of oscillation) of frequency selective element LC formation of C, just obtain sine wave (vibration output) and when adopting relaxation oscillating circuit (mode of oscillation), just obtain square wave (vibration output).And, the LC oscillatory circuit portion that is adopted in the above-mentioned displacement transducer 10 (both can be located at the displacement detecting portion side of the sensor 10, also can be located at printed circuit board side) to the enforcement electrical controls such as washing machine that above-mentioned displacement transducer 10 is housed, as disclosed LC oscillatory circuit (such as Colpitts types such as the fair 5-43398 communiques of spy, the hartley type, feedback-type, above-mentioned deformation type), disclosed LC oscillatory circuits such as Te Kaiping 7-324965 communique, or shown in the LC oscillatory circuit portion 19 of Figure 15, be that (the enamel insulation copper cash etc. that for example will be called magnet-wire is entangled on the cylindric bobbin of polyamide system resin, uses soldering by oscillator coil, fusion, spot welding, laser bonding etc. are connected on the terminal plate of Fa Sidun (Off ア ス ト Application) terminal #250 etc. and lead etc.) 88, capacitor (as polypropylene film capacitor) 89, the LC oscillatory circuit that non-buffer-type transducer IC (such as model 74HCU04) forms (comprises LC resonant circuit etc.No matter be auto-excitation type, separated exciting, block form, in-line arrangement, negative feedback etc.Do square wave oscillation output down together), more.
Generally, the microcomputer that carries on the printed circuit board (PCB) to the responsible electrical controls such as washing machine of carrying above-mentioned displacement transducer 10 etc. is according to data-signal (adopt according to the circuit of rising edge, trailing edge work etc.) work more, so when sine-wave oscillation output is done in the vibration output of displacement transducer, preferably be transformed to square wave, and signal is input to this microcomputer etc. by waveform shaping circuit etc.
The above-mentioned displacement transducer of producing in batches 10, often because the reasons such as firmness change that the temperature characterisitic of the deviation of the skew of the inductance (reactance, impedance) of oscillator coil 88, the relative permeability of magnetic component 85 etc. and vibrating reed (rubber) 83 causes, and and produce error (deviation) between the theoretical property initial oscillation in the design
Generally, the microcomputer that carries on the printed circuit board (PCB) to the enforcement electrical controls such as washing machine of carrying above-mentioned displacement transducer 10 is that the oscillation frequency that will measure at first behind the power connection is set as initial value and (for example write built-in RAM of microcomputer and EEPROM as data, outside EEPROM etc.), and measuring with the time to the corresponding frequency of the water level of the sink of washing machine feedwater, be according to and this initial value between deviation recognize water level, promptly, the software approachs that employing is handled as relative value etc. are so above-mentioned error (deviation) seldom can cause big obstruction.
But, when oscillation frequency is handled as absolute value (frequency values that measures itself), must utilize special fair 5-49056 communique (at the auxilliary metallic object of establishing of the periphery wall of upper shell, make it along the technology of the direction of principal axis displacement of oscillator coil), real fair 6-29706 communique (making the oscillating line circle body that is provided with movable structure technology) along the direction of principal axis displacement of oscillator coil, practical new No. 3003245 communique of case of registration disclosed technology such as (with the technology of insertion oscillator coils such as second magnetic) etc. are individually revised the above-mentioned displacement transducer 10 that (adjustment) has above-mentioned error (deviation).
That is to say, the oscillation frequency that microcomputer measures in good time (absolute value) is and calculates its displacement after a plurality of determination frequency that preestablish (for example write the built-in ROM of microcomputer and EEPROM, outside EEPROM etc. as data) are compared, so requirement will have certain high precision.
But there is following problems in above-mentioned displacement transducer 10.
First, when the water of supplying with to sink is swung, the gaseous tension of air changes in the choke box, magnetic component 85 is promptly because barometric fluctuation and being subjected to displacement easily, and this magnetic component 85 is by all the time the balance between the gas of importing in the compression helical spring of above-mentioned displacement transducer 10 compression helical spring 87 of adjusting screw 71 and vibrating reed reinforcement plate 84 elastic stressings and the compression chamber 82 that is made of vibrating reed 83 and last lower house 80 being come the holding position.
Therefore, require often to measure and the corresponding frequency of supplying with to sink of water level, and calculate mean value etc., with the prediction real water level.
Second, if adopt and to revise the above-mentioned public technology that (adjustment) has the above-mentioned displacement transducer 10 of above-mentioned error (deviation) individually, will append member, and also will append member and change design (size), will increase installation work-hour number etc., and can produce the problem that cost increases for installation.
Originally, the memory span that the program that oscillation frequency is handled as absolute value can be saved microcomputer, but,, do not have cost advantage as electric control system because the cost of displacement transducer height has been offset its advantage.
The 3rd, most of member of above-mentioned displacement transducer 10 adopts as ester moulding members such as PP resins, and the problem of existence is, but does not adopt the recycling of environmental protection to design (easily decomposing and detachable structure).
Even change the upper shell 70 of above-mentioned displacement transducer into metallic (such as aluminium sheet, copper coin), but because the initialization oscillation frequency can change, so change the number of turns (inductance L value) of oscillator coil 88, the static capacity (capacitor C value) of capacitor 89, the shape (external diameter, thickness) of magnetic component 85 etc., requirement designs again, to recover the theoretical initial oscillation of the preceding design aspect of displacement.
The 4th, above-mentioned displacement transducer 10 is designed for the above gaseous tension of 980Pa (Pascal), so just have the problem that can't be used to measure the small gaseous tension below the 980Pa.
For example only use the gaseous tension that imports in the compression chamber 82 that constitutes by vibrating reed 83 and lower house 80 to make under the situation of magnetic component 85 displacements at deletion compression helical spring 87 from above-mentioned displacement transducer 10, though to a certain extent also can corresponding 980Pa following micro pressure gas pressure, but the gaseous tension that is equivalent to magnetic component 85 own wts will be cancelled, and can't detect the following micro pressure gas of hundreds of Pa.
The 5th, above-mentioned displacement transducer 10 is for improving the sensitivity (resolution characteristic) of frequency transformation, disclosed as No. 25644660 communique of Jap.P. etc., except that magnetic component (first magnetic core array), also be provided with second magnetic core array (sheet metal, metal bar), and must be equipped on oscillator coil 88 about, or, do not have versatility with being equipped on the coiling hole of oscillator coil 88 after connecting between the magnetic core array.
That is to say, even the displacement of vibrating reed 83 is identical, because the size (highly) from the upper end of the axial upper shell 70 of oscillator coil 88 to the lower end surface of lower house 80 is higher than above-mentioned displacement transducer, so problem such as can produce in the displacement transducer installing space on the washing machine body of to pack into.
Summary of the invention
The present invention is just at existing these problems of prior art, but its objective is and a kind of gaseous tension change that absorbs generations such as swing is provided, can is adjusting initial oscillation under the prerequisite that does not increase expensive member, can be replaced as the metallic member of recycle under the situation that does not increase initial oscillation, only delete compression helical spring and also can detect the little gaseous tension in emblem, only sheet metal is contained in the displacement transducer of the highly versatile of the sensitivity (resolution characteristic) that can improve frequency inverted on the lower house.
For achieving the above object, displacement sensor of the present invention is that the gaseous tension with compression chamber is converted to the vibrating reed displacement, is frequency and the LC oscillatory type displacement transducer of doing square wave oscillation output with this vibrating reed displacement conversion, is provided with: the displacement detecting portion of movable oscillator coil mode; By the square wave oscillation output LC oscillatory circuit portion that the IC that comprises above-mentioned movable oscillator coil, capacitor and inverter function constitutes, it has following characteristics:
The essential structure of displacement detecting portion (the non-adjustable integer of the spring constant of compression helical spring) comprising: the upper shell that bears compression helical spring (for example also can be provided with and have output with the connector holder of portion of terminal etc.Also can hold capacitor); Be supported on the magnetic component (as the magnetic ferrites magnetic core) of ring cylindrical (the roughly cylinder of H tee section), foreign wine cup (cup) shape (the roughly cylinder of concave cross section) or the hollow cylindrical of this upper shell; The coiling hole is arranged and with this coiling hole state support relative with the peristome of this magnetic component in the oscillator coil of vibrating reed reinforcement plate; The vibrating reed reinforcement plate (doing to contact the action of disengaging) that can be with the displacement interlock of vibrating reed in this upper shell, moves with magnetic component along the direction of principal axis of oscillator coil; All the time this upper shell and this vibrating reed reinforcement plate are made the compression helical spring (the cylindric spring of traitorous distance volume, cone shaped spring, the double-layer spring variable) of elastic stressing as constant fixing cylindric spring, constant; According to the gaseous tension of compression chamber and along the direction of principal axis displacement of oscillator coil, be equipped on this vibrating reed reinforcement plate the bottom, be sandwiched in the circular vibrating reed (as rubber slab, stainless-steel sheet) between this upper shell and this lower house; Chimeric with this upper shell, have gas introduction port, together constitute the lower house of compression chamber with this vibrating reed.
Perhaps comprise: upper shell; Bear cylindrical, the cup-shaped or hollow cylindrical magnetic component in ocean of ring of compression helical spring; The coiling hole is arranged and with this coiling hole state support relative with the peristome of this magnetic component in the oscillator coil of vibrating reed reinforcement plate; The vibrating reed reinforcement plate that can be with the displacement interlock of vibrating reed in this upper shell, moves along the direction of principal axis of this oscillator coil; All the time this magnetic component and this vibrating reed reinforcement plate are made the compression helical spring of elastic stressing; According to the gaseous tension of compression chamber and along the direction of principal axis displacement of oscillator coil, be equipped on this vibrating reed reinforcement plate the bottom, be sandwiched in the circular vibrating reed between this upper shell and this lower house; Chimeric with this upper shell, have gas introduction port, together constitute the lower house of compression chamber with this vibrating reed.
Perhaps comprise: upper shell; The magnetic component supporting mass that bears compression helical spring (can be fixed on this upper shell, owing to being compressed the volute spring elastic stressing all the time, so also can not add fixing.Can be the supporting mass that hooks, holds or seal magnetic component); Ring by this magnetic component supporting mass supporting is cylindrical, the cup-shaped or hollow cylindrical magnetic component in ocean; The coiling hole is arranged and with this coiling hole state support relative with the peristome of this magnetic component in the oscillator coil of vibrating reed reinforcement plate; The vibrating reed reinforcement plate that can be with the displacement interlock of vibrating reed in this upper shell, moves along the direction of principal axis of this oscillator coil; All the time this magnetic component supporting mass and this vibrating reed reinforcement plate are made the compression helical spring of elastic stressing; According to the gaseous tension of compression chamber and along the direction of principal axis displacement of oscillator coil, be equipped on this vibrating reed reinforcement plate the bottom, be sandwiched in the circular vibrating reed between this upper shell and this lower house; Chimeric with this upper shell, have gas introduction port, together constitute the lower house of compression chamber with this vibrating reed.
Spring constant adjustable type compression helical spring comprises: upper shell (also can be provided with and have output with the connector holder of portion of terminal etc.Also can hold capacitor.); The compression helical spring adjustment screw that bears compression helical spring (is preferably in the groove that nearly central portion setting can use hex wrench, cross or Flathead screwdriver etc. to rotate.); Being located at this upper shell top (also can be fixed on this upper shell, make elastic stressing owing to be compressed volute spring all the time, so also can not fix.), this compression helical spring of can being spirally connected adjusts the magnetic component supporting mass (can be the supporting mass that hooks, holds or seal magnetic component) of screw; By the hollow cylindrical magnetic component (such as magnetic ferrites magnetic core) of this magnetic component supporting mass supporting; The coiling hole is arranged and with this coiling hole state support relative with the peristome of this magnetic component in the oscillator coil of vibrating reed reinforcement plate; The vibrating reed reinforcement plate (doing to contact the action of disengaging) that can be with the displacement interlock of vibrating reed in this upper shell, moves with magnetic component along the direction of principal axis of this oscillator coil; All the time this compression spring and this vibrating reed reinforcement plate are made the compression helical spring (such as the fixing variable cylindric spring of traitorous distance volume, coniform spring, the double-layer spring of helical spring, constant of constant) of elastic stressing; According to the gaseous tension of compression chamber and along the direction of principal axis displacement of oscillator coil, be equipped on this vibrating reed reinforcement plate the bottom, be sandwiched in circular vibrating reed between this upper shell and this lower house (such as rubber slab, stainless-steel sheet); Chimeric with this upper shell, have gas introduction port, together constitute the lower house of compression chamber with this vibrating reed.
And additional have the displacement transducer of the adjustment structure of initial oscillation to comprise: the upper shell of threaded portion is arranged at top; Bear the compression helical spring of compression helical spring and adjust screw; Can be spirally connected that this compression helical spring is adjusted screw, is bolted in the threaded portion on upper shell top, the magnetic component supporting mass that can move along the oscillator coil direction of principal axis (is preferably in top the groove that can rotate with instruments such as pincettes is set.); Be subjected to the hollow cylindrical magnetic component of this magnetic component supporting mass supporting; The coiling hole is arranged and with this coiling hole state support relative with the peristome of this magnetic component in the oscillator coil of vibrating reed reinforcement plate; The vibrating reed reinforcement plate that can be with the displacement interlock of vibrating reed in this upper shell, moves along the direction of principal axis of this oscillator coil; All the time this compression spring adjustment screw and this vibrating reed reinforcement plate are made the compression helical spring of elastic stressing; According to the gaseous tension of compression chamber and along the direction of principal axis displacement of oscillator coil, be equipped on this vibrating reed reinforcement plate the bottom, be sandwiched in the circular vibrating reed between this upper shell and this lower house; Chimeric with this upper shell, have gas introduction port, together constitute the lower house of compression chamber with this vibrating reed.
Magnetic component (such as magnetic ferrites magnetic core) made to be had thread groove the cylindric of (pin thread or female screw) (is preferably in substantial middle portion the groove that can rotate with hex wrench, cross or straight screwdriver etc. is set on the periphery wall.), additional have the displacement transducer of initial oscillation adjustment structure to comprise: bear the upper shell that compression helical spring, top be provided with the threaded portion (for example also can be provided with have output with the connector holder of portion of terminal etc., also can hold capacitor); Be bolted in this upper shell top the threaded portion, can (except general cylinder, also comprise cylinder of convex shape section roughly etc. at thread-shaped cylinder that the oscillator coil direction of principal axis moves.) magnetic component; The coiling hole is arranged and with this coiling hole state support relative with the bottom wall portion of this magnetic component in the oscillator coil of vibrating reed reinforcement plate; The vibrating reed reinforcement plate (doing to contact the action of disengaging) that can be with the displacement interlock of vibrating reed in this upper shell, moves with magnetic component along the direction of principal axis of this oscillator coil; All the time this upper shell and this vibrating reed reinforcement plate are made the compression helical spring (such as the fixing variable cylindric spring of traitorous distance volume, coniform spring, the double-layer spring of helical spring, constant of constant) of elastic stressing; According to the gaseous tension of compression chamber and along the direction of principal axis displacement of oscillator coil, be equipped on this vibrating reed reinforcement plate the bottom, be sandwiched in circular vibrating reed between this upper shell and this lower house (such as rubber slab, stainless-steel sheet); Chimeric with this upper shell, have gas introduction port, together constitute the lower house of compression chamber with this vibrating reed.
The adjustable displacement transducer of the spring constant of compression helical spring comprises: the upper shell of threaded portion is arranged at top; Bear compression helical spring and adjust screw that (being preferably in central portion setting can be with the groove of rotations such as hex wrench, cross or Flathead screwdriver with the compression helical spring that the threaded portion, top of this upper shell is spirally connected.); The magnetic component of the thread-shaped cylinder that be bolted in this compression helical spring adjustment screw, can move along the direction of principal axis of oscillator coil; The coiling hole is arranged and with this coiling hole state support relative with the bottom wall portion of this magnetic component in the oscillator coil of vibrating reed reinforcement plate; The vibrating reed reinforcement plate that can be with the displacement interlock of vibrating reed in this upper shell, moves along the direction of principal axis of this oscillator coil; All the time this compression helical spring adjustment screw and this vibrating reed reinforcement plate are made the compression helical spring of elastic stressing; According to the gaseous tension of compression chamber and along the direction of principal axis displacement of oscillator coil, be equipped on this vibrating reed reinforcement plate the bottom, be sandwiched in the circular vibrating reed between this upper shell and this lower house; Chimeric with this upper shell, have gas introduction port, together constitute the lower house of compression chamber with this vibrating reed.
The common trait of above-mentioned 7 kinds of displacement detecting portions is the bobbin portions that are provided with energy package vibrator coil at the vibrating reed reinforcement plate.
The feature that can be used for the displacement transducer of recycle is, upper shell and/or lower house are made (such as pressure rolling, processing, die casting, forging) with metal (such as iron plate, stainless-steel sheet, copper coin, aluminium sheet, titanium plate, magnesium plate and/or its composite plate, alloy).
The feature that can improve the displacement transducer of frequency transformation sensitivity (resolution characteristic) is, with the state relative with the coiling hole of oscillator coil on lower house, be provided with sheet metal (such as iron plate, stainless-steel sheet, copper coin, aluminium sheet, titanium plate, magnesium plate, with and/or its composite plate, alloy).
The feature that detects the displacement transducer of small gaseous tension is the deletion compression helical spring.
Description of drawings
Fig. 1 is the front section view of displacement detecting portion when the vibrating reed non-displacement of first embodiment of the invention displacement transducer.
Fig. 2 is the front section view of displacement detecting portion when the vibrating reed maximum displacement of first embodiment of the invention displacement transducer.
Fig. 3 is the reference front section view of displacement detecting portion of the displacement transducer of first embodiment of the invention.
Fig. 4 is that front section view is amplified in the reference of the AA portion of Fig. 3.
Fig. 5 is the front section view of displacement detecting portion when the vibrating reed non-displacement of second embodiment of the invention displacement transducer.
The reference front section view of the displacement detecting portion of Fig. 6 second embodiment of the invention displacement transducer.
Fig. 7 is that front section view is amplified in the reference of the BB portion of Fig. 6.
Fig. 8 is the upward view that dwindles of the displacement detecting portion of the fourth embodiment of the invention displacement transducer that shows the lower house bottom.
Fig. 9 is the front section view of displacement detecting portion when the vibrating reed non-displacement of sixth embodiment of the invention displacement transducer.
Figure 10 is the front section view of displacement detecting portion when the vibrating reed non-displacement of seventh embodiment of the invention displacement transducer.
Figure 11 is the front section view of displacement detecting portion when the vibrating reed non-displacement of ninth embodiment of the invention displacement transducer.
Figure 12 is the front section view of displacement detecting portion when the vibrating reed non-displacement of tenth embodiment of the invention displacement transducer.
Figure 13 is the reference stereographic map of the displacement detecting portion of present displacement transducer.
Figure 14 is the front section view of the displacement detecting portion of present displacement transducer.
Figure 15 is the LC oscillatory circuit portion that an embodiment displacement transducer is adopted.
Embodiment
Below in conjunction with description of drawings example of the present invention.
Fig. 1 is the front section view of displacement transducer test section 11 when vibrating reed 47 non-displacements of first embodiment of the invention.Fig. 2 is the front section view of displacement transducer test section 11 when vibrating reed 47 maximum displacements of first embodiment of the invention.Fig. 3 is the reference front section view of the displacement transducer test section 11 of first embodiment of the invention.Fig. 4 is that front section view is amplified in the reference of the AA portion of Fig. 3.
The displacement detecting portion 11 of the displacement transducer of first embodiment of the invention comprises: upper shell (such as PP tree such as refers at ester moulding member etc.) 20; The compression helical spring that bears compression helical spring 33 is adjusted screw ester moulding members such as (such as etc.) PP resins 30; The magnetic component supporting mass of be located at these upper shell 20 tops, this compression helical spring of can being spirally connected being adjusted screw 30 ester moulding members such as (such as etc.) PP resins 31 (threaded portion 32 is arranged on the internal perisporium); Hollow cylindrical magnetic component (such as magnetic ferrites magnetic core) 34 by these magnetic component supporting mass 31 supportings; Coiling hole 41 is arranged and with the relative oscillator coil 40 of state support on vibrating reed reinforcement plate 44 (46) of the peristome 35 of this coiling hole 41 and this magnetic component 34; Can with the displacement interlock of vibrating reed 47, vibrating reed reinforcement plate ester moulding members such as (such as etc.) POM resins 44 (46) that in this upper shell 20, moves along the direction of principal axis of this oscillator coil 40; All the time this compression helical spring is adjusted screw 30 and this vibrating reed reinforcement plate 44 (46) and make the compression helical spring of elastic stressing (such as stainless steel wire etc.) 33; From for example be installed in choke box the washing machine sink be directed at compression chamber 24 air this oscillator coil 40 of gaseous tension effect lower edge the direction of principal axis displacement, be equipped on the bottom of this vibrating reed reinforcement plate 44 (46) and be clipped in circular vibrating reed between this upper shell 20 and this lower house 25 (such as rubber, corrosion resistant plate) 47; 20 chimeric with this upper shell, gas introduction port 23 is arranged and constitutes lower house ester moulding members such as (such as etc.) PP resins 25 of compression chamber 24 with this vibrating reed 47.
The direction of the gas introduction port 23 of lower house 25 can be any.Generally be on gas introduction port 23, to connect (for example available clip, bonding agent etc. fixing and strengthen) pipe (soft material pipe, such as ethylene tube, rubber tube, silicone tubing etc.), be preferably in such as be located at pipe arrangement between the choke box on the washing machine sink.
Magnetic component supporting mass 31 can be fixed on this upper shell 20 (for example be spirally connected, be pressed into, ultrasonic soldering, thermal weld, adhesive securement, anchor clamps fix), owing to be under the state that is compressed volute spring 33 elastic stressings all the time, so can not fix yet.Magnetic component supporting mass 31 can be can hook (for example use pawl hook) of magnetic component 34, also can hold (for example inserting recess) of magnetic component 34, also with (for example integrally formed) of the sealing of magnetic component 34.
This oscillator coil 40, both copper cash had been twisted on the bobbin 43 and from bobbin 43 and pulled down, perhaps be installed on this vibrating reed reinforcement plate 44, also can having on the vibrating reed reinforcement plate 46 of bobbin 45 copper cash directly in bobbin portion 45 by each bobbin 43.From oscillator coil 40 to be located at output on the upper shell 20 with portion of terminal 51 (if make the connector holder shape, then be easy to fix with the connector hook of cable etc.) with outside wiring, both available flexible wiring material 54 grades are carried out distribution and are connected (such as soldering, fusion, spot welding, laser bonding), also can be directly connect with the copper cash of oscillator coil 40.
The LC oscillatory circuit portion that displacement transducer of the present invention adopted is (with reference to Figure 15.Can be located at displacement detecting portion 11 sides, also can be located at printed circuit board side the enforcement electrical controls such as washing machine of carrying this displacement transducer) 19 constitute by oscillator coil 40, capacitor 50 and non-buffer-type converter IC, do square wave oscillation output.
If the household electrical appliance that are equipped with displacement transducer etc. are set in the bad place (such as bathtub) of humidity 100%, displacement transducer environment for use, for waterproof, damp proof, anti-condensation, be preferably in this oscillator coil 40 and this capacitor 50 position fillings insulation compaction materials 52 (such as alkyd resin, epoxy resin, silicone resin, urethane resin), also can smear insulating material 53 (such as adhering and sealing material such as alkyd resin, epoxy resin, silicone resin, urethane resin also comprises waterproof material, damp-proof material, anti-condensation material of other materials etc.).
Vibrating reed 47 generally uses with EPDM (ethylene propylene rubber) and is the firmness change rate of change of the main material vibrating reed as the temperature characterisitic of positive number (when temperature is hanged down around hardness diminish, hardness increase when high).Capacitor 50, for example shown in the special fair 6-54275 communique etc., use polypropylene film medium shape (PP) capacitor of static capacity rate of change as the temperature characterisitic of negative (static capacity increased when environment temperature was low, static capacity reduces when high), be preferably in for example on the LC oscillatory circuit shown in the special fair 5-43398 communique, no matter how environment temperature all makes the oscillation frequency on a certain water level of washing machine keep stable.In addition, also can use the vibrating reed as main material with the little Si of firmness change rate (silicon), and the little ceramic capacitor of static capacity rate of change.
Past, as the technology of improving bonding fault, preferably open strictly according to the facts shown in clear 51-17749 communique etc., central part at vibrating reed 47 simultaneously is provided with a plurality of ring-type kicks 48, below this relative therewith lower house 25, a plurality of projections 26 are set also, reduce the contact area of this lower house 25 and vibrating reed 47 bottom pressure-bearing surfaces as far as possible.
As mentioned above, the displacement transducer of the first embodiment of the invention that constitutes by displacement detecting portion 11 and LC oscillatory circuit portion 19, even the water swing that sink is being supplied with, in the choke box during gaseous tension change of air, because of all the time to compression helical spring adjust screw 30 and vibrating reed reinforcement plate 44 (46) make the compression helical spring 33 of elastic stressing with the gaseous tension that is imported in the compression chamber 24 that constitutes by vibrating reed 47 and lower house 25 between the vibrator coil 40 of balance holding position also can absorb because of the gaseous tension that causes such as swinging and change by the interior air (the air damper effect is arranged) in the air trapping chamber that forms by upper shell 20 and this vibrator coil 40 22.
Thus, needn't often measure with the corresponding frequency of water level that sink is supplied with and calculate mean value etc. and go out real water level with prediction (understanding).
Fig. 5 is the front section view of displacement detecting portion 12 when vibrating reed 47 no displacements of the displacement transducer of second embodiment of the invention.
Fig. 6 is the reference front section view of displacement detecting portion 12 of the displacement transducer of second embodiment of the invention.Fig. 7 is that front section view is amplified in the reference of the BB portion of Fig. 6.
The displacement detecting portion 12 additional adjusting gears that initial oscillation is arranged of the displacement transducer of the second embodiment of the present invention, comprising: top is provided with the upper shell 20 of threaded portion 21; Bear the compression helical spring of compression helical spring 33 and adjust screw 30; Can be spirally connected this compression helical spring is adjusted screw 30 and is bolted in the threaded portion 21 on these upper shell 20 tops, the magnetic component supporting mass 31 (periphery wall and internal perisporium are provided with threaded portion 32) that can move along the direction of principal axis of vibrator coil 40; The hollow cylindrical magnetic component 34 that is supported by this magnetic component supporting mass 31; Coiling hole 41 is arranged, with the relative oscillator coil 40 of state support on vibrating reed reinforcement plate 44 (46) of the peristome 35 of this coiling hole 41 and this magnetic component 34; The vibrating reed reinforcement plate 44 (46) that can be with vibrating reed 47 displacement interlocks in this upper shell 20, moves along the direction of principal axis of this oscillator coil 40; All the time this compression helical spring adjustment screw 30 and this vibrating reed reinforcement plate 44 (46) are made the compression helical spring 33 of elastic stressing; From be installed on choke box on the washing machine sink be directed at compression chamber 24 air this oscillator coil 40 of gaseous tension lower edge the direction of principal axis displacement, be equipped on the bottom of this vibrating reed reinforcement plate 44 (46) and be clipped in this upper shell 20 and the circular vibrating reed 47 of 25 of lower houses; 20 chimeric with this upper shell, have gas introduction port 23, with these vibrating reed 47 common lower houses 25 that constitute compression chambers 24.
The details of each member of formation is identical with the displacement detecting portion 11 of the displacement transducer of first embodiment of the invention, so in this omission.
The structure that displacement transducer adopted of the second embodiment of the invention that is made of displacement detecting portion 12 and LC oscillatory circuit portion 19 need not add the member of revising oscillation frequency error (deviation) in addition as described above, and this member is that oscillation frequency is in the past necessary as the electric control system of absolute value processing, can save the memory span of microcomputer, oscillation frequency can be handled as absolute value, and be had cost advantage.
The displacement detecting portion 13 (not shown) of the displacement transducer of third embodiment of the invention is recycling environment-friendly products, be in the displacement detecting portion 12 of the displacement transducer of the displacement detecting portion 11 of the displacement transducer of above-mentioned first embodiment or second embodiment, make upper shell 20 and/or lower house with metal (such as iron plate, stainless-steel sheet, copper coin, aluminium sheet, titanium plate, magnesium plate and/or its composite plate, alloy).
The displacement transducer of the third embodiment of the invention that is made of displacement detecting portion 13 and LC oscillatory circuit 19 is equipped on position away from upper shell 20 and lower house 25 because of oscillator coil 40 as described above, so the flux A that produces around the oscillator coil 40 is reduced (flux=flux A-flux B that runs through oscillator coil 40) by the amount that the flux B because of reverse generations such as vortex flows is offset, the variable quantity of initial oscillation can be controlled at minimum, even, also needn't change the static capacity (capacitor C value) of capacitor so the number of turns of oscillator coil (inductance L value) is adjusted to some extent, shape (the external diameter of magnetic component, thickness) etc.
And, pass through Magnetic Shielding Effectiveness, the outside magnetic line of force etc. can not enter the inside of the displacement detecting portion 13 of displacement transducer, especially can not enter in the oscillator coil 40, the flux of oscillator coil 40 (magnetic line of force) also not too can arrive the outside of the displacement detecting portion 13 of displacement transducer, so, reduced by oscillation frequency factors of instability.
Fig. 8 is the upward view that dwindles of the displacement detecting portion 14 of the displacement transducer of the fourth embodiment of the invention of the bottom that shows lower house 25.
The sensitivity (resolution characteristic) of frequency changer has improved in the displacement detecting portion 14 (not shown) of the displacement transducer of fourth embodiment of the invention, with the state relative with the coiling hole 41 of oscillator coil 40 sheet metal (iron plate, stainless-steel sheet, copper coin, aluminium sheet, titanium plate, magnesium plate and/or its composite plate, alloy) has been installed in the bottom of lower house 25.
To increase 60 of magnetic component 34 and sheet metals apart from the time, dividing plate 61 can be placed between lower house 25 and the sheet metal 60.
In the time that its spacing will be dwindled, can be arranged at the top (vibrating reed 47 sides) of lower house 25.
The displacement transducer of the fourth embodiment of the present invention that constitutes by displacement detecting portion 14 and LC oscillatory circuit portion 19 as described above, cause is identical with the displacement transducer of other embodiment of the present invention to the size (highly) of lower house 25 lower end surface from the upper end of the axial upper shell 20 of oscillator coil 40, so, on the washing machine body of not worrying packing in the set displacement transducer placement space.
The displacement detecting portion 15 (not shown) of the displacement transducer of fifth embodiment of the invention can detect small gaseous tension, is that displacement detecting portion 11 at the displacement transducer of above-mentioned first embodiment is so that deleted compression helical spring 33 in the displacement detecting portion 14 of the 4th embodiment displacement transducer.
The fifth embodiment of the invention displacement transducer that constitutes by displacement detecting portion 15 and LC oscillatory circuit portion 19 as described above, be to be installed on the vibrating reed reinforcement plate 44 (46) than magnetic component 34 light oscillator coils 40, so it is corresponding with the deadweight that reduces, gaseous tension diminishes, and can detect than the small gaseous tension below the also low hundreds of Pa of past.
Fig. 9 is the front section view of displacement detecting portion 16 when vibrating reed 47 non-displacements of sixth embodiment of the invention displacement transducer.
The displacement detecting portion 16 of sixth embodiment of the invention displacement transducer is the non-adjustable integer of spring constant of compression helical spring 33, comprising: upper shell ester moulding members such as (such as etc.) PP resins 28 that bears compression helical spring 33; Ring by this upper shell 28 supportings (hold, hook) is cylindrical, the ocean is cup-shaped or the magnetic component (such as magnetic ferrites magnetic core) 34 of hollow cylindrical (also can be as registering the ring-shaped cylinder of the roughly convex shape section shown in practical new No. 3044686 communique of case); Coiling hole 41 is arranged, with the relative oscillator coil 40 of state support on vibration reinforcement plate 44 (46) of the peristome 35 of this coiling hole 41 and this magnetic component 34; The vibrating reed reinforcement plate that can be with vibrating reed 47 displacement interlocks in this upper shell 28, moves ester moulding members such as (such as etc.) POM resins 44 (46) along the direction of principal axis of this oscillator coil 40; All the time this upper shell 28 and this vibrating reed reinforcement plate 44 (46) are made the compression helical spring (such as stainless steel wire etc.) 33 of elastic stressing; From being located under the effect of gaseous tension of air that choke box on the washing machine sink is directed at compression chamber 24 bottom that these oscillator coil 40 axial displacements takes place, be equipped on this vibrating reed reinforcement plate 44 (46), being sandwiched in the circular vibrating reed (such as rubber, stainless-steel sheet) 47 of 25 of this upper shell 28 and lower houses; 28 chimeric with this upper shell, have gas introduction port, with the common lower house that constitutes compression chambers 24 of this vibrating reed 47 ester moulding members such as (such as etc.) PP resins 25.
As the type of sixth embodiment of the invention displacement transducer that is made of displacement detecting portion 16 and LC oscillatory circuit portion 19 stating and above-mentioned first embodiment to the second embodiment is different, more cheap displacement transducer do not have compression helical spring to adjust screw 30 and magnetic component supporting mass 31, so can be provided.
Figure 10 is the front section view of displacement detecting portion 17 when vibrating reed 47 non-displacements of the displacement transducer of seventh embodiment of the invention.
The displacement detecting portion 17 of the displacement transducer of seventh embodiment of the invention is the non-adjustable integers of compression helical spring 33 spring constants, comprising: upper shell ester moulding members such as (such as etc.) PP resins 20; Bear magnetic component supporting mass ester moulding members such as (such as etc.) PP resins 29 of compression helical spring 33; Ring by this magnetic component supporting mass 29 supportings (hold, hook) is cylindrical, the ocean is cup-shaped or the magnetic component (such as magnetic ferrites magnetic core) 34 of hollow cylindrical (also can be as registering the ring-shaped cylinder of the roughly convex shape section shown in practical new No. 3044686 communique of case); Coiling hole 41 is arranged, with the relative oscillator coil 40 of state support on vibrating reed reinforcement plate 44 (46) of the peristome 35 of this coiling hole 41 and this magnetic component 34; The vibrating reed reinforcement plate that can be with vibrating reed 47 displacement interlocks in this upper shell 20, moves ester moulding members such as (such as etc.) POM resins 44 (46) along the direction of principal axis of this oscillator coil 40; All the time this magnetic component supporting mass 29 and this vibrating reed reinforcement plate 44 (46) are made the compression helical spring (such as stainless steel wire etc.) 33 of elastic stressing; The direction of principal axis of this oscillator coil 40 of gaseous tension effect lower edge of the air of the compression chamber 24 that imports from the choke box that is installed on the washing machine sink be subjected to displacement, be equipped on this vibrating reed reinforcement plate 44 (46) the bottom, be clipped in circular vibrating reed between this upper shell 20 and the lower house 25 (such as rubber, stainless-steel sheet) 47; 20 chimeric with this upper shell, have gas introduction port 23 and with the common lower house that constitutes compression chambers 24 of this vibrating reed 47 ester moulding members such as (such as etc.) PP resins 25.
The displacement transducer of the seventh embodiment of the invention that is made of displacement detecting portion 17 and LC oscillatory circuit portion 19 is to have increased magnetic component supporting mass 29 on the basis of the 6th embodiment as described above, confirming operation when can be used for safeguarding etc. is with manually pushing magnetic component supporting mass 29.
The displacement detecting portion 18 of the displacement transducer of eighth embodiment of the invention is not shown) on the basis of the displacement detecting portion 17 of the displacement transducer of above-mentioned the 7th embodiment, having deleted magnetic component supporting mass 29, comprising: upper shell ester moulding members such as (such as etc.) PP resins 20; The ring that bears compression helical spring 33 is cylindrical, the ocean is cup-shaped or the magnetic component (such as magnetic ferrites magnetic core) 37 of hollow cylindrical (also can be as registering the ring-shaped cylinder of the roughly convex shape section shown in practical new No. 3044686 communique of case); Coiling hole 41 is arranged and with the relative oscillator coil 40 of state support on vibration reinforcement plate 44 (46) of the peristome 35 of this coiling hole 41 and this magnetic component 37; The vibrating reed reinforcement plate that can be with vibrating reed 47 displacement interlocks in this upper shell 20, moves ester moulding members such as (such as etc.) POM resins 44 (46) along the direction of principal axis of this oscillator coil 40; All the time this magnetic component 37 and this vibrating reed reinforcement plate 44 (46) are made the compression helical spring (such as stainless steel wire etc.) 33 of elastic stressing; From be located at choke box on the washing machine sink import compression chamber 24 air gaseous tension these oscillator coil 40 direction of principal axis displacements of effect lower edge, be equipped on this vibrating reed reinforcement plate 44 (46) the bottom, be sandwiched in the circular vibrating reed (such as rubber, stainless-steel sheet) 47 of 25 of this upper shell 20 and lower houses; 20 chimeric with this upper shell, have gas introduction port 23, with the common lower house that constitutes compression chambers 24 of this vibrating reed 47 ester moulding members such as (such as etc.) PP resins 25.
Under the situation that this magnetic component 34 of the displacement detecting portion 17 of the displacement transducer of not considering above-mentioned the 7th embodiment damages, if the ring of this magnetic component 34 is cylindrical, ocean shape cup-shaped or hollow circuit cylinder changes the shape of this magnetic component supporting mass 29 etc. into, and only bear this compression helical spring 33 by the magnetic component 37 that changes shape, then also this magnetic component supporting mass 29 can be installed specially.
As described above can provide more cheap displacement transducer by displacement detecting portion 18 with the eighth embodiment of the invention displacement transducer that LC oscillatory circuit etc. constitutes than above-mentioned the 7th embodiment.
Figure 11 is the front section view of displacement detecting portion 62 when vibrating reed 47 non-displacements of the displacement transducer of ninth embodiment of the invention.
The displacement detecting portion 62 of the displacement transducer of ninth embodiment of the invention is the non-adjustable integer of spring constant of middle footpath compression helical spring 67, comprising: footpath compression helical spring 67 in bearing, upper shell ester moulding members such as (such as etc.) PP resins 63 of threaded portion 64 is arranged; Be bolted in the threaded portion 64 on these upper shell 63 tops, (such as periphery wall is provided with the cylindric magnetic ferrites magnetic core of thread groove to the thread-shaped cylinder magnetic component that can move at the direction of principal axis of oscillator coil 40.And be preferably in the slot part that substantial middle portion is provided with rotations such as can passing through hex wrench, cross or Flathead screwdriver.) 65; Coiling hole 41 is arranged and with the relative oscillator coil 40 of state support on vibrating reed reinforcement plate 44 (46) of the bottom wall portion 66 of this coiling hole 41 and this magnetic component 65; The vibrating reed reinforcement plate that can be with vibrating reed 47 displacement interlocks in this upper shell 63, moves ester moulding members such as (such as etc.) POM resins 44 (46) along the direction of principal axis of this oscillator coil 40; All the time this upper shell 63 and this vibrating reed reinforcement plate 44 (46) are made the middle footpath compression helical spring (such as stainless steel wire etc.) 67 of elastic stressing; Be subjected to displacement, be equipped on this vibrating reed reinforcement plate 44946 from being loaded on the direction of principal axis of this oscillator coil 40 of gaseous tension effect lower edge that choke box on the washing machine sink imports the air of compression chamber 24) the bottom, be clipped in the circular vibrating reed (such as rubber, stainless-steel sheet) 47 of 25 of this upper shell 20 and lower houses; 63 chimeric with this upper shell, have gas introduction port 23, with the common lower house that constitutes compression chambers 24 of vibrating reed 47 ester moulding members such as (such as etc.) PP resins 25.
The displacement transducer of the ninth embodiment of the invention that is made of displacement detecting portion 62 and LC oscillatory circuit portion 19 is different to the type of second embodiment with above-mentioned first embodiment as described above, do not have compression helical spring to adjust screw 30 (69) and magnetic component supporting mass 31 etc., more cheap displacement transducer can be provided.
Figure 12 is the front section view of displacement detecting portion 68 when vibrating reed 47 non-displacements of the displacement transducer of tenth embodiment of the invention.
The displacement detecting portion 68 of the displacement transducer of tenth embodiment of the invention is the spring constant adjustable type of middle footpath compression helical spring 67, comprising: top is provided with upper shell ester moulding members such as (such as etc.) PP resins 20 of threaded portion 21; Bear footpath compression helical spring 67, be bolted in middle footpath compression helical spring on the threaded portion 21 on these upper shell 20 tops and adjust screw ester moulding members such as (such as etc.) PP resins 69; Be bolted in this that footpath compression helical spring is adjusted on the screw 69, (such as internal perisporium has the cylindrical magnetic ferrites magnetic core of thread groove for the cylindric magnetic component of screw shaped that can move at oscillator coil 40 direction of principal axis.Be preferably in substantial middle portion the groove that can use hex wrench, cross or straight screwdriver to rotate be set) 65; Coiling hole 41 is arranged and with the relative oscillator coil 40 of state support on vibrating reed reinforcement plate 44 (46) of the bottom wall portion 66 of this coiling hole 41 and this magnetic component 65; The vibrating reed reinforcement plate that can be with the displacement interlock of vibrating reed 47 in this upper shell 20, moves ester moulding members such as (such as etc.) POM resins 44 (46) along the direction of principal axis of this oscillator coil 40; All the time footpath compression helical spring in this is adjusted screw 69 and this vibrating reed reinforcement plate 44 (46) and make the middle footpath compression helical spring of elastic stressing (such as stainless steel wire etc.) 67; For example from be installed in choke box on the washing machine sink be directed at compression chamber 24 air this oscillator coil 40 of gaseous tension effect lower edge the direction of principal axis displacement, be equipped on the bottom of this vibrating reed reinforcement plate 44 (46) and be clipped in circular vibrating reed between this upper shell 20 and this lower house 25 (such as rubber, stainless-steel sheet) 47; 20 chimeric with this upper shell, gas introduction port 23 is arranged and constitutes lower house ester moulding members such as (such as etc.) PP resins 25 of compression chamber 24 with this vibrating reed 47.
The displacement transducer of the tenth embodiment of the invention that is made of displacement detecting portion 68 and LC oscillatory circuit 19 is identical with above-mentioned second embodiment as described above, the program that it adopted need not add as in addition with the member of oscillation frequency as electric control system past necessary correction (adjustment) the oscillation frequency error (deviation) of absolute value processing, can save microcomputer storage and oscillation frequency be handled the cost of reduction electric control system as absolute value.
More than, best example of the present invention is illustrated, but the present invention is not limited in above-mentioned example, can in the category that does not break away from the invention aim, more make up and change.
As, from the prior art to embodiments of the invention, all be that example is illustrated displacement transducer with the washing machine, also can be applicable to washing machine above-mentioned other household electrical appliance in addition etc. certainly.
Displacement transducer of the present invention, can absorb swing and wait the gaseous tension change that causes, under the prerequisite that does not increase expensive member, adjust initial oscillation, under the situation that changes initial oscillation not significantly, be replaced with the recyclable metallic member that utilizes again, and just delete compression helical spring and just can detect small gaseous tension, only sheet metal is contained in the sensitivity (resolution characteristic) that just can improve frequency transformation on the lower house, and has very high versatility.
Claims (11)
1. displacement transducer is that the gaseous tension with compression chamber is transformed to the vibrating reed displacement, claims to be transformed to frequency with this vibrating reed position and makes the LC oscillatory type displacement transducer of square wave oscillation output, it is characterized in that having displacement detecting portion and LC oscillatory circuit portion,
This displacement detecting portion comprises: bear the upper shell that compression helical spring, top are provided with the threaded portion; Be bolted in the threaded portion on this upper shell top, the screw shaped cylinder magnetic component that can move along the direction of principal axis of oscillator coil; The coiling hole is arranged and with this coiling hole state support relative with the bottom wall portion of this magnetic component in the oscillator coil of vibrating reed reinforcement plate; The vibrating reed reinforcement plate that can in this upper shell, move with the displacement interlock of vibrating reed along the vibrator coil direction of principal axis; All the time this upper shell and this vibrating reed reinforcement plate are made the compression helical spring of elastic stressing; In the direction of principal axis displacement of this oscillator coil of the gaseous tension effect lower edge of compression chamber, be equipped on this vibrating reed reinforcement plate bottom and be clipped in circular vibrating reed between this upper shell and the lower house; Chimeric with this upper shell, gas introduction port arranged, constitute the lower house of compression chamber jointly with this vibrating reed,
This LC oscillatory circuit portion is made of above-mentioned oscillator coil, capacitor, IC, and does square wave oscillation output.
2. displacement transducer is that the gaseous tension with compression chamber is transformed to the vibrating reed displacement, claims to be transformed to frequency with this vibrating reed position and makes the LC oscillatory type displacement transducer of square wave oscillation output, it is characterized in that having displacement detecting portion and LC oscillatory circuit portion,
This displacement detecting portion comprises: top is provided with the upper shell of threaded portion; The compression spring that bear compression helical spring, is bolted in the threaded portion on this upper shell top is adjusted screw; Be bolted in the screw shaped cylinder magnetic component that this compression spring is adjusted screw, can be moved along the direction of principal axis of oscillator coil; The coiling hole is arranged and with this coiling hole state support relative with the bottom wall portion of this magnetic component in the oscillator coil of vibrating reed reinforcement plate; The vibrating reed reinforcement plate that can in this upper shell, move with the displacement interlock of vibrating reed along the vibrator coil direction of principal axis; All the time this compression spring adjustment screw and this vibrating reed reinforcement plate are made the compression helical spring of elastic stressing; In the direction of principal axis displacement of this oscillator coil of the gaseous tension effect lower edge of compression chamber, be equipped on this vibrating reed reinforcement plate bottom and be clipped in circular vibrating reed between this upper shell and the lower house; Chimeric with this upper shell, gas introduction port arranged, constitute the lower house of compression chamber jointly with this vibrating reed,
This LC oscillatory circuit portion is made of above-mentioned oscillator coil, capacitor, IC, and does square wave oscillation output.
3. displacement transducer is that the gaseous tension with compression chamber is transformed to the vibrating reed displacement, claims to be transformed to frequency with this vibrating reed position and makes the LC oscillatory type displacement transducer of square wave oscillation output, it is characterized in that having displacement detecting portion and LC oscillatory circuit portion,
This displacement detecting portion comprises: the upper shell that bears compression helical spring; Ring by this upper shell supporting is cylindrical, the ocean is cup-shaped or the magnetic component of hollow cylindrical; The coiling hole is arranged and with this coiling hole state support oscillator coil in vibrating reed reinforcement plate on relative with the peristome of this magnetic component; The vibrating reed reinforcement plate that can in this upper shell, move with the displacement interlock of vibrating reed along the vibrator coil direction of principal axis; All the time this upper shell and this vibrating reed reinforcement plate are made the compression helical spring of elastic stressing; In the direction of principal axis displacement of this oscillator coil of the gaseous tension effect lower edge of compression chamber, be equipped on this vibrating reed reinforcement plate bottom and be clipped in circular vibrating reed between this upper shell and the lower house; Chimeric with this upper shell, gas introduction port arranged, constitute the lower house of compression chamber jointly with this vibrating reed,
This LC oscillatory circuit portion is made of above-mentioned oscillator coil, capacitor, IC, and does square wave oscillation output.
4. displacement transducer is that the gaseous tension with compression chamber is transformed to the vibrating reed displacement, claims to be transformed to frequency with this vibrating reed position and makes the LC oscillatory type displacement transducer of square wave oscillation output, it is characterized in that having displacement detecting portion and LC oscillatory circuit portion,
This displacement detecting portion comprises: upper shell; The ring that bears compression helical spring is cylindrical, the ocean is cup-shaped or the magnetic component of hollow cylindrical; The coiling hole is arranged and with this coiling hole state support oscillator coil in vibrating reed reinforcement plate on relative with the peristome of this magnetic component; The vibrating reed reinforcement plate that can in this upper shell, move with the displacement interlock of vibrating reed along the vibrator coil direction of principal axis; All the time this magnetic component and this vibrating reed reinforcement plate are made the compression helical spring of elastic stressing; In the direction of principal axis displacement of this oscillator coil of the gaseous tension effect lower edge of compression chamber, be equipped on this vibrating reed reinforcement plate bottom and be clipped in circular vibrating reed between this upper shell and the lower house; Chimeric with this upper shell, gas introduction port arranged, constitute the lower house of compression chamber jointly with this vibrating reed,
This LC oscillatory circuit portion is made of above-mentioned oscillator coil, capacitor, IC, and does square wave oscillation output.
5. displacement transducer is that the gaseous tension with compression chamber is transformed to the vibrating reed displacement, claims to be transformed to frequency with this vibrating reed position and makes the LC oscillatory type displacement transducer of square wave oscillation output, it is characterized in that having displacement detecting portion and LC oscillatory circuit portion,
This displacement detecting portion comprises: upper shell; Bear the magnetic component supporting mass of compression helical spring; The ring that is supported on this magnetic component supporting mass is cylindrical, the ocean is cup-shaped or the magnetic component of hollow cylindrical; The coiling hole is arranged and with this coiling hole state support oscillator coil in vibrating reed reinforcement plate on relative with the peristome of this magnetic component; The vibrating reed reinforcement plate that can in this upper shell, move with the displacement interlock of vibrating reed along the vibrator coil direction of principal axis; All the time this magnetic component supporting mass and this vibrating reed reinforcement plate are made the compression helical spring of elastic stressing; In the direction of principal axis displacement of this oscillator coil of the gaseous tension effect lower edge of compression chamber, be equipped on this vibrating reed reinforcement plate bottom and be clipped in circular vibrating reed between this upper shell and the lower house; Chimeric with this upper shell, gas introduction port arranged, constitute the lower house of compression chamber jointly with this vibrating reed,
This LC oscillatory circuit portion is made of above-mentioned oscillator coil, capacitor, IC, and does square wave oscillation output.
6. displacement transducer is that the gaseous tension with compression chamber is transformed to the vibrating reed displacement, claims to be transformed to frequency with this vibrating reed position and makes the LC oscillatory type displacement transducer of square wave oscillation output, it is characterized in that having displacement detecting portion and LC oscillatory circuit portion,
This displacement detecting portion comprises: upper shell; Bear the compression helical spring of compression helical spring and adjust screw; The magnetic component supporting mass of be located on this upper shell, this compression helical spring that can be spirally connected being adjusted screw; The hollow cylindrical magnetic component that this magnetic component supporting mass is supported; The coiling hole is arranged and with this coiling hole state support oscillator coil in vibrating reed reinforcement plate on relative with the peristome of this magnetic component; The vibrating reed reinforcement plate that can in this upper shell, move with the displacement interlock of vibrating reed along the vibrator coil direction of principal axis; All the time this compression helical spring adjustment screw and this vibrating reed reinforcement plate are made the compression helical spring of elastic stressing; In the direction of principal axis displacement of this oscillator coil of the gaseous tension effect lower edge of compression chamber, be equipped on this vibrating reed reinforcement plate bottom and be clipped in circular vibrating reed between this upper shell and the lower house; Chimeric with this upper shell, gas introduction port arranged, constitute the lower house of compression chamber jointly with this vibrating reed,
This LC oscillatory circuit portion is made of above-mentioned oscillator coil, capacitor, IC, and does square wave oscillation output.
7. displacement transducer is that the gaseous tension with compression chamber is transformed to the vibrating reed displacement, claims to be transformed to frequency with this vibrating reed position and makes the LC oscillatory type displacement transducer of square wave oscillation output, it is characterized in that having displacement detecting portion and LC oscillatory circuit portion,
This displacement detecting portion comprises: top is provided with the upper shell of threaded portion; Bear the compression helical spring of compression helical spring and adjust screw; Can be spirally connected this compression helical spring is adjusted screw, is bolted in the threaded portion on this upper shell top, the magnetic component supporting mass that can move along the direction of principal axis of oscillator coil; The hollow cylindrical magnetic component that this magnetic component supporting mass is supported; The coiling hole is arranged and with this coiling hole state support oscillator coil in vibrating reed reinforcement plate on relative with the peristome of this magnetic component; The vibrating reed reinforcement plate that can in this upper shell, move with the displacement interlock of vibrating reed along the vibrator coil direction of principal axis; All the time this compression helical spring adjustment screw and this vibrating reed reinforcement plate are made the compression helical spring of elastic stressing; In the direction of principal axis displacement of this oscillator coil of the gaseous tension effect lower edge of compression chamber, be equipped on this vibrating reed reinforcement plate bottom and be clipped in circular vibrating reed between this upper shell and the lower house; Chimeric with this upper shell, gas introduction port arranged, constitute the lower house of compression chamber jointly with this vibrating reed,
This LC oscillatory circuit portion is made of above-mentioned oscillator coil, capacitor, IC, and does square wave oscillation output.
8. as each described displacement transducer in the claim 1,2,3,4,5,6,7, it is characterized in that upper shell and/or lower house are made with metal.
9. as each described displacement transducer in the claim 1,2,3,4,5,6,7,8, it is characterized in that, sheet metal is contained on the lower house, make its coiling hole relative with oscillator coil.
10. as each described displacement transducer in the claim 1,2,3,4,5,6,7,8,9, it is characterized in that, but the bobbin portion that the package oscillator coil is installed on the vibrating reed reinforcement plate.
11. displacement transducer, it is characterized in that, accessory rights requires to delete compression helical spring in each described displacement transducer in 1,2,3,4,5,6,7,8,9,10, and the gaseous tension of the slight pressure of the compression chamber below the 980Pa is carried out frequency inverted.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP372438/2000 | 2000-12-07 | ||
| JP2000372438A JP2002174560A (en) | 2000-12-07 | 2000-12-07 | Displacement sensor |
| JP372438/00 | 2000-12-07 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1357743A true CN1357743A (en) | 2002-07-10 |
| CN1217151C CN1217151C (en) | 2005-08-31 |
Family
ID=18841981
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01142990 Expired - Fee Related CN1217151C (en) | 2000-12-07 | 2001-12-04 | Displacement sensor |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2002174560A (en) |
| CN (1) | CN1217151C (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103712667A (en) * | 2012-09-29 | 2014-04-09 | 博西华电器（江苏）有限公司 | Water level detecting device and washing machine with same |
| CN104812194A (en) * | 2014-01-29 | 2015-07-29 | 纬创资通股份有限公司 | Water-proof device |
| CN106052799A (en) * | 2016-07-27 | 2016-10-26 | 神龙电气有限公司 | High-accuracy water level sensor |
| CN110987690A (en) * | 2018-10-03 | 2020-04-10 | 株式会社三丰 | Hardness tester |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007040317A (en) * | 2005-07-29 | 2007-02-15 | Sekisui Chem Co Ltd | Constant force expansion device |
| JP2010170452A (en) * | 2009-01-26 | 2010-08-05 | Aisin Seiki Co Ltd | Regulator and engine-driven air conditioner |
| JP2011033421A (en) * | 2009-07-31 | 2011-02-17 | Hitachi Appliances Inc | Pressure sensor of pump device |
| KR101081393B1 (en) * | 2009-10-28 | 2011-11-08 | 린나이코리아 주식회사 | Gas pressure sensor for boiler |
| CN102493154B (en) * | 2011-11-14 | 2013-07-10 | 南通市华冠电器有限公司 | Initial frequency regulating circuit of water level sensor |
| CN110017936B (en) * | 2019-03-21 | 2023-12-15 | 成都凯天电子股份有限公司 | Method for realizing pressure P-displacement characteristic of bellows vacuum bellows |
-
2000
- 2000-12-07 JP JP2000372438A patent/JP2002174560A/en active Pending
-
2001
- 2001-12-04 CN CN 01142990 patent/CN1217151C/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103712667A (en) * | 2012-09-29 | 2014-04-09 | 博西华电器（江苏）有限公司 | Water level detecting device and washing machine with same |
| CN104812194A (en) * | 2014-01-29 | 2015-07-29 | 纬创资通股份有限公司 | Water-proof device |
| CN104812194B (en) * | 2014-01-29 | 2017-07-07 | 纬创资通股份有限公司 | Water-proof device |
| CN106052799A (en) * | 2016-07-27 | 2016-10-26 | 神龙电气有限公司 | High-accuracy water level sensor |
| CN110987690A (en) * | 2018-10-03 | 2020-04-10 | 株式会社三丰 | Hardness tester |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2002174560A (en) | 2002-06-21 |
| CN1217151C (en) | 2005-08-31 |
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