CN101504296B - Flow rate measuring device - Google Patents
Flow rate measuring device Download PDFInfo
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- CN101504296B CN101504296B CN2009101199524A CN200910119952A CN101504296B CN 101504296 B CN101504296 B CN 101504296B CN 2009101199524 A CN2009101199524 A CN 2009101199524A CN 200910119952 A CN200910119952 A CN 200910119952A CN 101504296 B CN101504296 B CN 101504296B
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Abstract
To provide a flowmeter capable of enhancing metering resolution to thus effect accurate metering. When a fluid to be measured is supplied to or discharged from a metering chamber 4, a membrane 11 provided in the metering chamber 4 is reciprocally actuated, and a rotation section R1 performs rotational movement in association with reciprocal movement of the membrane 11. At this time, since the rotation section R1 is provided with a magnet 5 or a direction sensor 6, the magnet 5 or the direction sensor 6 also effects rotational movement. The direction sensor 6 detects rotational movement, to thus determine a relative position between the membrane and the rotation section. Thus, the position of the membrane 11 can be detected, and metering resolution is enhanced. Thus, accurate metering can be performed.
Description
The application is is on September 29th, 2005 applying date, be entitled as the dividing an application of 200580032337.X application for a patent for invention of " flow measurement device ".
Technical field
The present invention relates to a kind of flowmeter that is used to measure such as the flow of the fluid of gas, liquid etc., relate in particular to a kind of diaphragm type flowmeter.
Background technology
The diaphragm type flowmeter has been described as being used to measuring the flowmeter such as the flow of the fluid of gas etc.; This flowmeter has film; This film with the fluid of scheduled volume is supplied with and is expelled to measurement chamber produce explicitly separately once to-and-fro movement (referring to, for example, JP-A-2004-93497).
Shown in figure 20, this flowmeter 100 is provided with film portion (from figure, omitting), and this partial response is fed into measurement chamber and produces to-and-fro movement from the measurement chamber discharge in gas.Linkage assembly 101 is connected to side shaft, and the to-and-fro movement of this side shaft and film portion pivots explicitly.Linkage assembly 101 is through forming a pair of long gudgeon 101a and a pair of combining than short gudgeon 101b.Edge setting around centrosymmetric pair of magnets 103 along rotary part 102.One insertion switch 104 is set, and this switch is activated when magnet 103 has rotated to specific rotatable phase.And, a controller 105 also is set, this controller is according to confirming flow from the signal of lead-in wire switch 104 outputs and 106 the flow of confirming thus being shown in the display part.
Therefore; When film rotating disc 102b has been fed into measurement chamber in response to gas and discharges and when producing to-and-fro movement from measurement chamber; Rotating disc 102b produces once rotation, therefore, is connected in the also rotation in an identical manner of pair of magnets 103,103 of rotating disc 102b.Lead-in wire switch 104 detects the rotation of magnet 103,103 and signal is sent to controller 105, in controller, flow is calculated.The flow that calculates thus is presented on the display part 106.Rotation with rotating disc 102b pivots relatedly to pivot valve 112 for this, thus suitably opening and closing gas access 110 and gas vent 111.Therefore, supply and emission gases.
Summary of the invention
The technical matters that the present invention solves
By the way, formerly in the flowmeter 100 of explanation, the rotating tee of rotating disc 112b is crossed the lead-in wire switch 104 that use has been activated and is detected when magnet 103 has arrived specific rotatable phase.A plurality of magnets 103 are used to strengthen resolution.
But in the time of outside magnet 103 is positioned at specific rotatable phase, lead-in wire switch 104 is not activated.State in can't detection procedure, this will cause carrying out the problem of accurate measurement.
When flowmeter 100 is used for the city air supply system (in this system; Flowmeter is parallel to a plurality of resident families and is installed in the pipeline) time; Following situation may occur, promptly can propagate into the air meter 100 of another resident family by the air pulse that is just in time caused in the flowmeter that is installed on the resident family that uses a large amount of gases 100 gas flow before and backflow.In this case, when using a plurality of magnet 103, magnet 103 produces to-and-fro movements, activates thus and the switch 104 that stops to go between.Therefore, be used such calculating operation of carrying out as gas.Therefore, existence can't be carried out the problem of accurate measurement.
Above-mentioned flowmeter need carry out converting the to-and-fro movement of film into rotatablely move process inevitably.As a result, be difficult to realize that the rotatablely moving of rotary part such as rotating disc 102b all has constant angular velocity at each the some place along the rotary part movement locus.Therefore, magnet is along the movement velocity of track change (motion of non-constant velocities).Therefore, even when a plurality of magnet is set, also be difficult to obtain as required to reflect the metering of accurate flow.
But, need accurately real time measure flow at present gradually.Specifically, need accurately to detect the measuring accuracy and the resolution of each round-robin fluctuations in discharge.
The object of the present invention is to provide and to carry out the flowmeter that accurate measurement increases metering resolution simultaneously.
The method of dealing with problems
A kind of flowmeter of the present invention comprises: main body; Be fixed to the film portion of said main body, this film portion is defined for the measurement chamber of holding with discharged liquid; Synchronously carry out the rotating part that rotatablely moves with the to-and-fro movement of said film portion; Be arranged on the parts to be detected on one of said main body and said rotating part; Be arranged on the direction sensor on another of said main body and said rotating part, the motion that this sensor position component to be detected causes with being associated with rotatablely moving of said rotating part; And the flow rate calculation part, this part detects said position component to be detected by the detection signal from said direction sensor output, and calculates the flow of said fluid.
" rotatablely move expression " along the unidirectional motion of closed curve, and along this moving of perfect circular, oval or flat ellipse etc.Through this structure, when fluid to be measured is supplied to measurement chamber or when measurement chamber is discharged, be arranged on film in the measurement chamber by reciprocally actuating, rotating part rotatablely moves with the to-and-fro movement of film relatedly.Simultaneously, because magnet or direction sensor are arranged on the rotating part,, magnet or direction sensor rotatablely move so also producing.Direction sensor detects and rotatablely moves, and therefore confirms the relative position between film and the rotating part.Therefore, can detect the position of film.Therefore, strengthen metering resolution, thereby carry out accurate metering.
About above-mentioned explanation, make parts to be measured be positioned on the rotating part thereby can construct flowmeter, and direction sensor is positioned at the center that rotatablely moves of parts to be detected.
Through above-mentioned structure, the position of direction sensor is fixed with respect to parts to be detected.Therefore, direction sensor can accurately detect around the relative position of the parts to be detected of direction sensor rotation, and can carry out accurate metering according to the relative position that detects thus.
Said parts to be detected are formed by magnet, and said direction sensor is formed by the magnetic direction sensor.In this case, said magnet is in that single polarity is rotated when pointing to said magnetic direction sensor with it always.
Through this structure, when the magnetic direction sensor is as the center, the orientation change of magnetic flux.When magnet had rotated one time, the direction and the deviation of magnet also were rotated, and therefore, magnet can clearly detect around the coordinate of magnetic direction sensor rotation.
And flowmeter of the present invention comprises: main body; Be fixed to the film portion of said main body, this film portion is defined for the measurement chamber of holding with discharged liquid; Be used for converting the to-and-fro movement of said film portion into rotatablely move movement conversion part; Be fixed in the partly parts to be detected of one of them of said main body and a certain mechanism, said mechanism part is partly formed by said film portion and movement conversion; Be arranged on said main body and said mechanism the part another on direction sensor, this sensor position component to be detected; And the flow rate calculation part, this part detects said position component to be detected by the detection signal from said direction sensor output, and calculates the flow of said fluid.
By this structure, any one of magnet and direction sensor is arranged on the main body, another be arranged on by film be used for to-and-fro movement with film and convert mechanism's part that the movement conversion that rotatablely moves partly forms into.The motion of fluid can directly detect.Thus, strengthen the metering resolution, it is heavy to carry out accurate meter.
One of said parts to be detected and said direction sensor are fixed to said film portion.
By this structure, one of parts to be detected and direction sensor are arranged on the film portion that directly receives the fluid motion influence.Therefore, but the precision that increasing runoff is measured.
Parts to be detected are formed by magnet and can be fixed to said film portion.In this case, said direction sensor is formed by the magnetic direction sensor.
When magnetic sensor is arranged on the film portion, need wiring, cause the complex structure of flowmeter thus.But by structure of the present invention, the magnet that need not connect up is fixed to film portion, so structure becomes simple.
Flowmeter of the present invention comprises: main body; Be fixed to the film portion of said main body, this film portion is defined for the measurement chamber of holding with discharged liquid; Synchronously carry out the rotating part that rotatablely moves with the to-and-fro movement of said film portion; Be arranged on the parts to be detected on the said rotary part; Direction sensor, the motion that this sensor position component to be detected causes with being associated with rotatablely moving of said rotating part; Counterweight coefficient calculations part, this calculating section detect the difference in the rotation of said rotary part and calculate the angular velocity that obtains at an arbitrary position in the circumferential direction along said rotary part and in response to the counterweight coefficient of said angular velocity according to the detection signal output from said direction sensor output; And flow rate calculation part; This part detects said position component to be detected by the detection signal from the output of said direction sensor, and the flow through the fluid locating at an arbitrary position with reference to said position component to be detected and said counterweight coefficient calculations to obtain.
By this structure, can be through using the rotation of thus obtained counterweight coefficient detection rotary part.Therefore, can keep watch on the accurate instantaneous flow always.
In above-mentioned explanation, said counterweight coefficient calculations is partly through with reference to once rotating the required time from the detection signal of said direction sensor output, measuring said rotary part along a plurality of RPs of the sense of rotation of said rotary part; Angular velocity is detected in corresponding position along the sense of rotation of said rotary part; And in the presumptive area of the sense of rotation of said rotary part; Through with reference to the reference time of confirming by the time that falls into the predetermined difference value scope and said angular speed calculation counterweight coefficient corresponding to the position of carrying out angular velocity detection; In said presumptive area, said Measuring Time falls into the predetermined difference value scope.
By this structure, the flow that obtains in the pre-position along sense of rotation passes through to use thus obtained counterweight coefficient calculations, and also can obtain the flow along instantaneous direction.Therefore, the accurate instantaneous flow can be kept watch on always, and also the unusual increase in the flow can be handled quickly.
Said counterweight coefficient calculations is partly through with reference to once rotating the required time from the detection signal of said direction sensor output, measuring said rotary part along a plurality of RPs of the sense of rotation of said rotary part; Corresponding RP at said rotary part detects angular velocity; And in the sense of rotation distance presumptive area of said corresponding RP of said rotary part, the counterweight coefficient that said time of reference and said turn meter are calculated.
By this structure, calculated amount can be further reduced, and the burden on counterweight coefficient calculations part and the flow rate calculation part can be reduced, can reduce cost thus.
Another kind of flowmeter of the present invention comprises: main body; Be fixed to the film portion of said main body, this film portion is defined for the measurement chamber of holding with discharged liquid; Synchronously carry out the rotating part that rotatablely moves with the to-and-fro movement of said film portion; Be arranged on the parts to be detected on the said rotary part; Direction sensor, the motion that this sensor position component to be detected causes with being associated with rotatablely moving of said rotating part; And flow rate calculation part; This part detects in the rotation of said rotary part and the difference in the said position component to be detected through the detection signal by said direction sensor output; And calculate the flow of said fluid; Wherein, said flow rate calculation part is once rotated the required time measuring said rotary part along a plurality of positions of the sense of rotation of said rotary part, and calculates the flow in each position according to nearest Measuring Time.
By this structure, calculated amount can be further reduced, and the burden on counterweight coefficient calculations part and the flow rate calculation part can be reduced, can reduce cost thus.
In above-mentioned flowmeter, said direction sensor preferably is located substantially on the centre rotational axis of said rotary part.And parts to be detected preferably are positioned at along said rotary part outer peripheral position, and said direction sensor equates on the whole sense of rotation of said rotary part with distance between the said parts to be detected basically.Said parts to be detected are also formed by magnet, and said direction sensor also can be formed by the magnetic direction sensor.
By above-mentioned structure, can be provided with simply, flowmeter cheaply.
And another kind of flowmeter of the present invention comprises: main body; Be fixed to the film portion of said main body, this film portion is defined for the measurement chamber of holding with discharged liquid; Synchronously carry out the rotating part that rotatablely moves with the to-and-fro movement of said film portion; Be arranged on the magnet on the said rotary part; A plurality of lead-in wire switches, said lead-in wire switch is used to detect the motion of the magnet that rotatablely moves that is associated with said rotating part; And the flow rate calculation part, this part detects in the rotation of said rotary part and the locational variation of said magnet by the detection signal by said a plurality of lead-in wire switch outputs, and calculates the flow of said fluid.Said flow rate calculation part is measured said rotary part in each position of a plurality of lead-in wire switches and is once rotated the required time, and according to nearest Measuring Time calculated flow rate.In this flowmeter, said magnet preferably is arranged on the outer peripheral a certain position along rotary part, and said a plurality of lead-in wire switch preferably be arranged on said outer peripheral near.
In above-mentioned structure, can use the combination of present widely used magnet and lead-in wire switch.
Advantage of the present invention
According to flowmeter of the present invention, strengthen the resolution of meter fluid flow, and can carry out accurate metering.
Flowmeter of the present invention uses parts to be detected and direction sensor.Relative position between parts to be detected and the direction sensor is determined, thus the flow of test fluid.Therefore, strengthen the resolution of metering, and can carry out accurate metering.
When parts execution to be detected rotatablely moved, the velocity variations that rotatablely moves was detected, and strengthens the resolution and the metering precision of metered flow thus.
Description of drawings
Fig. 1 is the skeleton view that illustrates as the monolithic film membrane formula aerometer of the flowmeter of first embodiment.
Fig. 2 is the longitudinal sectional view of feature profile that the diaphragm type aerometer of first embodiment is shown.
Fig. 3 is the decomposition diagram of feature profile that the diaphragm type aerometer of first embodiment is shown.
Fig. 4 is the planimetric map of the feature profile of diaphragm type aerometer.
Fig. 5 is the decomposition diagram that the relation between the position of the position that is arranged on the magnet on the rotating disc and direction sensor is shown.
Fig. 6 A is the planimetric map that illustrates around the state of the magnet of direction sensor rotation; 6B illustrates the curve map of edge by the variation of the direction of the detected magnetic flux of direction sensor.
Fig. 7 is the decomposition diagram that the relation between the position of the magnet positions that is arranged on the linkage assembly and direction sensor is shown.
Fig. 8 A is the planimetric map that illustrates around the state of the magnet of direction sensor rotation; 8B illustrates the curve map of edge by the variation of the direction of the detected magnetic flux of direction sensor.
Fig. 9 is the longitudinal sectional view that illustrates according to the feature profile of the diaphragm type aerometer of second embodiment.
Figure 10 is the decomposition diagram according to the feature profile of the diaphragm type aerometer of second embodiment.
Figure 11 is the skeleton view according to the diaphragm type aerometer of the 3rd embodiment.
Figure 12 is the cut-open view of the lower case of diaphragm type aerometer.
Figure 13 is the decomposition diagram of diaphragm type aerometer.
Figure 14 is the planimetric map of linkage assembly, rotary part and valve member, and they all are arranged in the lower case of diaphragm type aerometer.
Figure 15 is near the decomposition diagram of the rotary part of diaphragm type aerometer.
Figure 16 A, 16B, 16C and 16D illustrate the skeleton view that pilot-gas is supplied to each measurement chamber and discharges from each measurement chamber.
Figure 17 A and 17B are the skeleton view of each part along the weight of sense of rotation.
Figure 18 is the skeleton view of each part along the weight of sense of rotation.
Figure 19 is near the enlarged perspective according to the rotary part of the diaphragm type aerometer of another embodiment.
Figure 20 is the planimetric map of characteristic of the diaphragm type aerometer of correlation technique.
The explanation of Reference numeral
4 measurement chamber
5,5b magnet
6,6b direction sensor
6A, 6B, 6C, the 6D switch that goes between
7 controllers
11 films
C, 50 housings (main body)
51 valve portions
52 film portion
53 linkage assemblys
54 rotary parts
100 diaphragm type aerometers (flowmeter)
M0 mechanism part
M1 movement conversion part
Embodiment
The embodiment of flowmeter of the present invention is described below with reference to accompanying drawings.
(first embodiment)
Fig. 1 illustrates the skeleton view of conduct according to the monolithic film membrane formula aerometer of the flowmeter of one embodiment of the present invention; Fig. 2 is the longitudinal sectional view of the feature profile of diaphragm type aerometer; Fig. 3 is the decomposition diagram of the feature profile of diaphragm type aerometer; Fig. 4 is the planimetric map of feature profile of the diaphragm type aerometer of present embodiment.
Shown in Fig. 1 to 4, the diaphragm type aerometer 100 that constitutes flowmeter comprises with gas with scheduled volume and is supplied to the measurement chamber 4 among the main body C (housing) and produces the film 11 of independent once reciprocating motion explicitly from the gas that measurement chamber 4 is discharged scheduled volumes; Convert the movement conversion part M1 that rotatablely moves into the to-and-fro movement that is used for film 11.Aerometer 100 comprises any one magnet 5 that is connected in part M0 of mechanism and main body C, and said mechanism partly comprises film 11 (perhaps with the film portion F that is described hereinafter) and movement conversion part M1; With the direction sensor 6 of one of the residue that is fixed to part M0 of mechanism and main body C, this sensor is with respect to the relative position (direction) of magnet 5.In the present embodiment, magnet 5 is arranged on the rotating disc 20 as rotating part, and this rotating disc rotatablely moves in response to the to-and-fro movement generation of film 11.Rotating disc 20 constitutes the part of movement conversion part M1.Hereinafter will explain, the direction sensor 6 that is used for detecting the direction of magnet 5 is arranged on the upper casing part C2 of a part that constitutes main body, and is secured to main body.
Now more detailed content will be described.As shown in Figure 1, the diaphragm type aerometer 100 that is used as the flowmeter of the embodiment of the invention uses the housing with gas supply port 2a and gas discharge outlet 2b to assemble.Aerometer is connected to along the centre position of gas supply pipe (from accompanying drawing, omitting), and this supply pipe provides gas tangentially to the user by gas supply port 2a and gas discharge outlet 2b, such as resident family.Flow to the gas that flows through gas supply pipe is measured, and the gas flow that will measure thus is presented on the display part 3 of the outside that is arranged at housing C.Housing C is formed with upper casing part C2 by lower case portion C 1, constitutes main body thus.
As shown in Figure 3, diaphragm type aerometer 100 constitutes through the following parts of assembling in housing C: the V of valve portion is used for pilot-gas and is supplied to measurement chamber 4 and discharges from measurement chamber 4; Film portion F is supplied to measurement chamber 4 and discharges and to-and-fro movement from measurement chamber 4 in response to gas; Rotating part R1, this part synchronously is connected to film portion F by linkage assembly L, makes the once reciprocating motion of passing through film portion F produce once rotation; And controller 7, as the calculating section of definite flow and the flow that display part 3 demonstrations are confirmed thus.
Because aerometer has been known, detailed explanation and be shown in this omission.Except controller 7, the direction sensor 6 (referring to Fig. 5) that is used to detect the direction (referring to Fig. 4) of magnet 5 is arranged on upper casing part C2, and this will be described hereinafter.Though do not illustrate, aerometer is equipped with extraly and is used to detect the pressure by air pressure sensor that is supplied to diaphragm type aerometer 100, is used to detect the seismograph and the gas supply stop valve of seismic oscillation.Aerometer is configured to, and is occurring under the unusual situation, has detected abnormal pressure or seismograph has detected earthquake such as pressure transducer, and controller 7 pilot-gas are supplied with the cut-out of stop valve and display abnormality information on the display part.In Fig. 1, Reference numeral 8 refer to be used to hide the operation part of reseting a (not shown) reset the jack-post head, this is reseted axle and is used for that gas is supplied with stop valve and discharges from dissengaged positions.
Shown in Fig. 2 and 3, the center of lower case portion C 1 is separated by partition wall 9.Be essentially on any side that columniform space is arranged on partition wall 9, this space be used to form measurement chamber and with partition wall 9 as the bottom.The center in each space is separated by film portion F, and the opening portion in each space is closed by lid 10.Therefore, measurement chamber 4 is formed on any side of respective films part F.In brief, two film portion F are set, form four measurement chamber 4 thus.
Through with reference to Fig. 2 and 3, film portion F is carried out other explanations.Film portion F comprises film 11, remains on the circular membrane plate 12 at film 11 centre of surface places; And the hinged support 13 that remains on the center of outer film plate 12.When film portion F was set, the edge of film 11 remained in the lower case portion C 1 by frame shape film fixed head 14.
One end of wing plate 15 is supported by the hinged support 13 of each film portion F pivotally.The axle center of side shaft 16 is vertically directed, and side shaft 16 support pivotally, and the while upper end of side shaft is passed the hole in the upper wall that is formed on lower case portion C 1 hermetically.The lower end of side shaft 16 is connected to wing plate 15 side relative with its pivot support side.
Shown in Fig. 3 and 4, linkage assembly comprises two covers, big gudgeon 17 and small trunnion 18 that every cover mechanism connects together with comprising end pivot.One end of each big gudgeon 17 is connected to the upper end of corresponding side shaft 16 pivotally.
Shown in Fig. 3 and 4, thereby being arranged on the upper wall pilot-gas of lower case portion C 1, valve portion V supplies with and is expelled to four measurement chamber 4, the to-and-fro movement of valve portion V through film portion F is unlocked and closes.
With reference to Fig. 4 valve portion V is described once more below.Two gas supply/escape hole X keep with accordingly via being interconnected of film 11 two measurement chamber 4 respect to one another, and these two gas supply/escape hole X are separated from each other on the upper wall of lower case portion C 1 side by side.Two covers are set, and every cover comprises two gas supply/escape hole X, and gas discharge outlet Y is interposed between the gas supply/escape hole X of each corresponding cover.In brief, be formed with two row's supply/escape holes, wherein two supply/escape hole X are arranged on every row's the sidepiece of gas discharge outlet Y.
The gas that the gas discharge outlet Y of every row's supply/outlet opening part is connected in the upper wall that is formed on lower case portion C 1 is discharged connector Z, thereby forms gas passing away (from accompanying drawing, saving).Gas is discharged connector Z and is connected to gas discharge outlet 2b by the gas discharge path (from accompanying drawing, saving) that is arranged among the upper casing part C2, and upper casing part C2 is positioned at the top of lower case portion C 1.
The recessed portion (saving from accompanying drawing) (being called " connection recessed portion " hereinafter) that is used for setting up connection is formed on the back of pivot valve 23.When being positioned at each hub switch side, pivot valve 23 is connected with gas discharge outlet Y by being communicated with the gas supply/escape hole X of recessed portion with contiguous hub switch side, position, thereby opens the gas supply/escape hole X that is positioned at the end relative with the hub switch side.When the center that is positioned at respect to pivotal orientation, pivot valve 23 cuts out gas supply/escape hole X.
As shown in Figure 4, rotating part R1 has rotating circular disk 20.One end of small trunnion 18 pivots is connected to rotating circular disk 20, and the other end that the one of which end is connected to the arm 21 of pivot valve 23 is supported by rotating circular disk 20 pivotally.
By rotating circular disk 20 and linkage assembly L, be configured for converting the to-and-fro movement of film 11 into rotatablely move movement conversion part M1.The part M0 of mechanism is formed by movement conversion part M1 and film 11.Therefore, magnet 5 is connected to rotating circular disk 20, and this rotating circular disk is among part M0 of mechanism and the main body C, and direction sensor 6 is connected to main body C, and this main body C is another among part M0 of mechanism and the main body C.
Therefore, when gas has been supplied to measurement chamber 4 perhaps from measurement chamber 4 discharges, activated to film 11 to-and-fro movements, rotate side shaft 16 thus.The big gudgeon 17 of linkage assembly L pivots through the rotation of side shaft 16, thus by small trunnion 18 these rotating circular disks 20 of rotation.Arm 21 is pivoted by the rotation of rotating circular disk 20, thereby activates pivot valve 23.
Fig. 5 illustrates the magnet 5 that is attached to rotating circular disk 20 and concerns attached to the position between the direction sensor on the lower surface of upper casing part C2 6.
Because direction sensor 6 is known, so it is described in detail in this omission.General is the biaxial magnet direction sensor that is integrated with MR element, film coil, driving circuit etc., and direction sensor can detect the direction of magnetic flux.Three-dimension sensor such as favour department energising bridge also can be used as direction sensor 6.
As shown in Figure 5, thereby activating explicitly, the to-and-fro movement of linkage assembly L and film 11 rotates this rotating circular disk 20, therefore, magnet 5 execution that are attached on the rotating circular disk 20 rotatablely move; For example, complete circular motion, avette motion, elliptic motion, closed curve motion etc.Direction sensor 6 is arranged on the lower surface of upper body C2, rotatablely moves thereby get into.Need direction sensor 6 be placed on the center that rotatablely moves.
As shown in Figure 5, when rotating circular disk 20 rotated through linkage assembly L, the magnet that is arranged on the rotating circular disk 20 also rotated.But shown in Fig. 6 (A), the polarity (for example, the S utmost point) of faces direction sensor 6 location remains unchanged always.
Specifically, shown in Fig. 6 (A), when magnet 5 rotated simultaneously identical polarity faces direction sensor 6 around direction sensor 6, rotatablely moving of the direction of magnetic flux and magnet 5 changed explicitly.Therefore, shown in Fig. 6 (B), direction sensor 6 can detect the position of magnet 5 according to the direction of magnetic flux.
Thus, the rotation angle of rotating circular disk 20 can confirm that the reciprocating state of film portion F can further be detected.Therefore, but the resolution of increasing runoff metering.Though the rotation status of rotating circular disk 20 can be detected at any time, need detect to carry out at interval arbitrarily, thereby reduce to be arranged on the loss of the battery in the flowmeter 1.
Be relevant to above-mentioned flowmeter 1, explained that magnet 5 is carried out to rotatablely move and direction sensor 6 is positioned at the situation at the center of rotatablely moving.Equally also may be used on direction sensor 6 and be not positioned at the situation that the center still is positioned at the inside that rotatablely moves.
In above-mentioned flowmeter 1, magnet 5 is arranged on the rotating circular disk 20, and polarity arrangement is faces direction sensor 6 always.But the present invention is not limited to this layout.As shown in Figure 7, even be positioned at 18 last times of cropped ear axle of linkage assembly L when magnet 5, magnet 5 forms closed curves.Therefore, can detect magnet.In this case,, carries out magnet 5 rotation when carrying out parallel motion.Therefore, the polarity of faces direction sensor 6 changes along with rotatablely moving.Shown in Fig. 8 (A), for example, when remaining at the N of magnet 5 utmost point among Fig. 8 when producing rotation in upwards directed, the S utmost point above magnet 5 is positioned at direction sensor 6 time towards direction sensor 6.When the position of magnet 5 arrival direction sensors 6 belows, the N pole-face is to direction sensor 6.In this case, shown in Fig. 8 (B), direction sensor 6 detects the direction of magnetic flux.
In addition, direction sensor 6 also can be positioned at the outside of carrying out the magnet 5 that rotatablely moves.Selectively, magnet 5 also can be positioned at the center that rotatablely moves, and direction sensor 6 also can rotate.
(second embodiment)
Now the second embodiment of the present invention will be described.Use identical Reference numeral with the first embodiment components identical, the explanation of repetition is omitted at this.
Fig. 9 and 10 illustrates the diaphragm type aerometer 100 corresponding to the flowmeter of second embodiment.In this diaphragm type aerometer 100, magnet 5b is arranged on as perhaps being in magnet on any one film 11 of part M0 of mechanism and housing C and combines reciprocating position, ground with film 11.Simultaneously, direction sensor 6b is arranged on as that housing C of the residue of part M0 of mechanism and housing C and goes up (for example, on the upper surface of the lower case C1 among Fig. 2).
By said structure, when gas is supplied to measurement chamber 4 or when measurement chamber 4 was discharged, film 11 reciprocally moved, make magnet 5b also with the mode to-and-fro movement of integral body.The direction sensor 6b that the location is set detects the to-and-fro movement of magnet 5b, thus according to the position metered flow of film 11.
In this case, the magnet 5b that is attached to film 11 does not need wiring.Therefore, magnet 5b can easily be attached to film 11, makes the structure be used to adhere to magnet also become simple.
(the 3rd embodiment)
Figure 11 illustrates the 3rd embodiment of flow meter applications of the present invention to aerometer.The housing 50 that constitutes the main body of aerometer 100 is divided into upper body 50a and lower case 50b.Upper body 50a is provided with gas supply port 1 and gas discharge outlet 2.Aerometer 100 is connected to the centre position by gas supply port 1 and gas discharge outlet 2 along gas supply pipe, and this gas supply pipe provides gas tangentially to the user such as resident family, and measurement flow is crossed the flow of the gas of flue thus.The counter 3 that is arranged on the main body 50 shows the gas flow of measuring thus.
Shown in figure 13, aerometer 100 comprises and is used for controlling the valve portion 51 that provides gas tangentially to the measurement chamber 4 that is formed on lower case 50b and gas is discharged from this measurement chamber 4; Be supplied to measurement chamber 4 and discharge and reciprocating film portion 52 by gas from measurement chamber 4; Thereby with synchronously be connected to film portion 52 by linkage assembly 53 in response to motion of the once reciprocating of film portion 52 and rotation rotary part 54 once.Aerometer 100 is so-called diaphragm type aerometers with film portion 52.Film portion 52 is confirmed the shape and the volume of the measurement chamber 4 among the lower case 50b.
Except controller 7, be used for detected gas pressure pressure transducer, be used to detect seismograph such as the vibration of earthquake, gas and supply with stop valve etc. and be arranged on upper body 50a.Adopt known mechanism as the mechanism that is used for these elements.
Shown in Figure 12 and 13, the center of lower case part 50b has partition wall 9 to separate.Be essentially on any side that columniform space is arranged on partition wall 9, this space be used to form measurement chamber and with partition wall 9 as the bottom.The center in each space is further separated by film portion 52, and the opening portion in each space is closed by lid 10.Therefore, measurement chamber 4 is formed on any side of respective films part 52.In brief, a pair of film portion 52 is set, and forms four measurement chamber 4.
Shown in Figure 12 and 13, film portion 52 comprises film 11, remains on the circular membrane plate 12 of each respective surfaces center of film 11; And the hinged support 13 that remains on the center of outer film plate 12.The edge of film 11 remains among the lower case part 50b by frame shape film fixed head 14.
One end of web joint 15 is supported by the hinged support 13 of each film portion 52 pivotally.The lower end of side shaft 16 is connected to the other end of wing plate 15, and the upper end of said side shaft 16 upwards gets among the upper body 50a through the hole in the upper wall that is formed on lower case 50b.
Shown in Figure 13 and 14, linkage assembly 53 comprises two covers, big arm 17 and forearm 18 that every cover mechanism connects together with comprising end pivot.One end of each big arm 17 is connected to the upper end of each side shaft 16 pivotally.
Shown in Figure 14 and 15, rotary part 54 comprises crank axle 54a, thereby this crank axle can be around vertically extending axis rotation by bearing support 29 supportings of the lower case 50b upper wall that adheres to; And rotating circular disk 54b, this disk is connected to the upper end of crank axle 54a with one heart and adopts watch from the top round-shaped.Crank arm 22 is connected to crank axle 54a and radially stretches to the outside simultaneously.
In the present invention, a magnet 5 is arranged on and the radially spaced position of the turning axle of rotary part 54.Magnet 5 is along the external margin location of the rotating circular disk 54b of rotary part 54.In addition, magnetic direction sensor 6 is positioned at the position of the centre of surface top of rotary part 54.Magnetic direction sensor 6 is positioned at the rotation center axis of rotary part 54.Therefore, magnetic direction sensor 6 is consistent with distance between the magnet 5 on the whole sense of rotation (circumferential direction) of rotary part 54.
Shown in Figure 13 and 14, valve portion 51 is arranged on the upper wall of lower case part 50b, thereby pilot-gas is supplied to four measurement chamber 4 and gas is discharged from measurement chamber, and valve portion 51 is through the to-and-fro movement opening and closing of film portion 52.
Shown in figure 14, two gas supply/escape hole X1, X2 keep with accordingly via being interconnected of film 11 two measurement chamber 4 respect to one another, and these two gas supply/escape holes are separated from each other on the upper wall of lower case part 50b.Gas delivery outlet Y is formed between gas supply/exhaust opening X1 and the X2.In brief, form two gas supply/escape hole X1, X2, these two mouths are positioned on the both sides of gas discharge outlet Y simultaneously.Gas supply/exhaust opening X1, X2 and gas discharge hole Y form a round.Two rounds are formed in the upper wall of lower case 50b.
Gas discharge outlet Y discharges connector Z by the gas that gas discharge path (from accompanying drawing, saving) is connected in the upper wall that is formed on lower case part 50b.Gas is discharged connector Z and is connected to gas discharge outlet 2 by the gas discharge path (from accompanying drawing, saving) that is arranged among the upper casing part 50a.
Shown in Figure 14 and 15, crank bearing 24 is positioned at the lower position of the crank arm 22 of the crank axle 54a that is connected to rotary part 54.One end of bent axle bearing 24 is supported by the axial region 22a that is arranged on crank arm 22 leading ends pivotally, makes that the axis normal of axial region 22a is directed.
Simultaneously, the upper end of side shaft 16 is by the end pivot supporting of each longer arm 17, and each end than galianconism 18 is bearing in the position of the pivot axis of the crank arm 22 that departs from the crank bearing 24 pivotally.By this structure, film portion 52 synchronously connects together with rotary part 54.
Two toggle-action levers 25 that are connected to the shaft portion 22a of crank arm 22 are connected to corresponding pivot valve 23.When this has carried out the once reciprocating motion to film portion 52, the angle that corresponding side shaft 16 pivots and is scheduled to.With the pivoting action of side shaft 16 explicitly, rotary part 54 is through linkage assembly 53 rotations once.The corresponding pivot valve 23 that pivots, thus pilot-gas is supplied to four measurement chamber 4 and discharges from said measurement chamber.
With reference to Figure 16, will explain that now pilot-gas supply with to get into four measurement chamber 4 and from the chamber, discharges.Four measurement chamber 4 are from left to right illustrated by 4a, 4b, 4c and 4d.Similarly, four gas supply/escape hole X are from left to right illustrated by Xa, Xb, Xc, Xd.
Figure 16 (a) illustrates left pivot valve 23a and stops the state of Thuban rotary valve 23b unlatching gas supply/exhaust opening Xd simultaneously, and gas supply/exhaust opening Xc and gas discharge outlet Y are interconnected.In this state, film portion 52 is pushed measurement chamber 4c under the gaseous tension effect that flows into measurement chamber 4d, and therefore, the gas among the measurement chamber 4c is discharged by gas discharge hole Y.Rotary part 54 is by the motion of film portion 52 and rotate, and left pivot valve 23a is towards right motion, Open from This Side gas supply/exhaust opening Xa.When gas began to flow into measurement chamber 4a, the gas of inserting measurement chamber 4b began to discharge (Figure 16 (b)).
By the motion of the film portion 52 that obtains this moment, Thuban rotary valve 23b is activated towards right, Open from This Side gas supply/exhaust opening Xc.Gas begins to flow into measurement chamber 4c, and the gas that is packed into measurement chamber 4d begins to discharge (Figure 16 (c)).Subsequently, the process corresponding to Figure 16 (d), 16 (a), 16 (b) and 16 (c) repeats according to this order continuously.
When this had produced the once reciprocating motion to each of film portion 52, rotary part 54 rotations once.The magnet 5 that is arranged on the rotary part 54 is carried out the circumferential movement that centers on rotary part 54 and center on magnetic direction sensor 6.Motion shown in Figure 16 also is applicable to first and second embodiment.
The method that is used for fixing magnetic direction sensor 6 is not limited to the description carried out with reference to this embodiment, can adopt the various embodiment of this method.For example, when the circuit board of installing such as the electronic component of controller 7 was positioned at the top position of rotary part 54, magnetic direction sensor 6 can be fixed to the lower surface of circuit board, thereby reached the position of the top, center of rotating circular disk 54b.
The magnetic direction sensor 6 that is positioned at place, rotary part 54 top positions is formed by the favour department energising bridge that comprises MR element (antimagnetic effect element) and film coil.Two favour department energising bridges are arranged so that the direction right angle intersection of magnetic sensitive axis.Specifically, magnetic direction sensor 6 is the twin shaft magnetic field sensors with X axis and Y axis.The X axle component output in magnetic field is as the electric potential difference Vx of each electric bridge, and the Y axle component of same magnetic field is output as the electric potential difference Vy of identical electric bridge.The direction in magnetic field can detect through the ratio of confirming electric potential difference Vx and electric potential difference Vy two-dimentionally.Film coil applies bias voltage magnetic field, is used for the susceptibility of Enhanced MR element.Certainly, the structure of magnetic direction sensor 6 is not limited to top mentioned.Also can use the three-dimension sensor that can further increase favour department energising bridge.
Because magnetic direction sensor 6 is caught the variation of magnet 5 around the magnetic field of magnetic direction sensor 6 rotations, so can detect magnet 5 along circumferential position.Keep watch on the angular velocity omega that this position can obtain magnet always with simulating, therefore can confirm the change of instantaneous delivery.And, see that from saving viewpoint of energy the SI that the angular velocity of the magnet of the spacing between two points in respect of time (1 second etc.) can be scheduled to keeps watch on, thus the flow in monitoring preset SI.Under the situation of the prior art of magnet and guide switch combination, by when the activation of magnet through near produce the guide switch switch/stop to detect flow.Therefore, the frequency of monitors for activity is probably by the restricted number of magnet and/or guide switch.If the quantity of magnet and/or guide switch increases, the problem in cost and space also can occur so.But when using the magnetic direction sensor, this problem can not occur.
SI can change according to cycle and the predetermined condition of time.For example, can imagine that the SI is long during low speed rotation, short during the high speed rotating.
Preferably, magnet 5 is arranged on the rotating circular disk 54b regularly, makes identical polar always in the face of magnetic direction sensor 6.
The flow rate calculation part that is included in the controller 7 confirms that according to the signal of magnetic direction sensor 6 flow of confirming thus is presented on the display part 3.In addition, controller 7 also comprises the counterweight coefficient calculations part that is used to calculate the counterweight coefficient, and this will describe at the back literary composition.Though flow rate calculation part and counterweight coefficient calculations part do not illustrate, they can constitute through common counting circuit.
When flow was confirmed according to the signal of magnetic direction sensor 6, flow rate calculation part and this two the performed operation of counterweight coefficient calculations part of being included in the controller 7 will describe with reference to accompanying drawing hereinafter.
As stated, the mechanism that converts to-and-fro movement into circus movement is difficult to the circus movement of similar constant speed circus movement of realizing ideal.Therefore, the movement velocity of magnet changes to another arbitrfary point along track from an arbitrfary point.Only detecting the signal that obtained by magnetic direction sensor 6 hardly can be corresponding to the detection of the accurate movement velocity of the magnet at every some place, and extends to the value of accurate flow.
Therefore, in the present embodiment, the counterweight coefficient is according to the set positions on the path and be applied to each position; That is the angular velocity of position on the rotary part circumferential direction and setting and application rotary part.The flow supposition is confirmed corresponding to each position through using the counterweight coefficient.Specifically, carry out following operation.
(1) rotary part 54 once rotates the needed time " t " and measures at a plurality of RPs place.In the embodiment shown in Figure 17 (a), rotary part 54 once rotates the required time " t " and measures (with 45 ° spacings along circumferential setting) at eight some places of A to H.Magnetic direction sensor 6 is measured the time " t " of passing through the time that A orders from time that magnet 5 order through A for the first time to magnet 5 once more.This metrological operation is also carried out at other some place.
(2) next, confirm angular velocity omega at the place, arbitrfary point.The arbitrfary point is not limited to eight points from A to H.This point can be between these points.Magnetic direction sensor 6 can detect along the position of the magnet of circumferential all points.Speak by the book, confirm (Figure 17 (a)) in the scheduled period of sampling time Δ t along two some P1 of circumferential mutual vicinity, the magnet positions (direction) at P2 place.Angular velocity omega 1 can calculate according to change value and the relation between the sampling time.
(3) according in (2) the measurement angular velocity omega from a bit (at this point; And a plurality of RP time corresponding of in (1), confirming " t " between difference fall into the predetermined difference value scope) to marking off a scope, calculate the counterweight coefficient " k " of respective sub-partitions thus along predetermined circumferential arbitrfary point.
Be relevant to aforementioned calculation, when flow value calculates according to the angular velocity that obtains at the place, arbitrfary point, can realize following relation.
Q＝k×V×(θ/360)×3600/t
=k * V * 10 * ω (formula 1)
Simultaneously, when flow value once rotates the required time when calculating according to rotary part 54, realize following relation.
Q=V * 3600/t (formula 2)
In formula, each mark is represented following physical quantity.V rises the once rotation of gas through rotary part 54 and is supplied to measurement chamber, and gas supplied is discharged from measurement chamber thus.Specifically, V rises gas and passes through measurement chamber.
V: unit measures weight=measurement chamber volume and (rises: L)
θ: angle (degree: deg)
T: the time (second: s)
Q: flow value (rise/hour: L/h)
ω: angular velocity (degree/second: deg/s)
K: counterweight coefficient (constant)
In step (1), calculate the flow value Q (Q that obtains in respective point from A to H through using (formula 2)
A, Q
B, Q
C, Q
D, Q
E, Q
F, Q
G, Q
H).For the point that makes progress in week, comprise some points, at these some places, the difference in the flow value falls into predetermined difference value (for example, two some Q
A, Q
B) in the scope, in angular velocity, do not think the difference that has essence.Use is according to point (for example, Q
A, Q
BMean value) definite reference value Q ' and with it as the Q in (formula 1).Through using the ω that obtains at the place, arbitrfary point that step (2) is confirmed, confirm the counterweight coefficient " k " of the point of having measured corresponding to ω in each zone.
Q ' according to confirming from respective point confirms counterweight coefficient " k ".Shown in Figure 17 (b), the k2 to k7 that other ω of measuring with angle speed 2 to ω 9 are corresponding and and the corresponding k1 of the ω that between a P1 and P2, confirms 1 definite through following formula.
Q’＝k1×V×10×ω1
Q’＝k2×V×10×ω2
Q’＝k3×V×10×ω3
Q’＝k4×V×10×ω4
Q’＝k5×V×10×ω5
Q’＝k6×V×10×ω6
Q '=k7 * V * 10 * ω 7 (formula 3)
Can think that also counterweight constant " k " becomes non-linear according to ω.Therefore, corresponding counterweight coefficient " k " is applied in every kind of situation of low discharge situation, intermediate flow situation and heavy traffic condition.
In above-mentioned explanation, the structure boundary between counterweight coefficient calculations part and the flow rate calculation part is not clear and definite.For example, the circuit that has these two kinds of functions can use single circuit to constitute.From function aspects; Counterweight coefficient calculations part detects the variation in the rotation of rotary part 54 according to the detection signal of magnetic direction sensor 6 outputs, and calculates along the angular velocity omega of the optional position of the circumferential direction of rotary part 54 with corresponding to the counterweight coefficient of angular velocity omega.Flow rate calculation part detects the position of magnet 5 according to the detection signal by 6 outputs of magnetic direction sensor, and through the flow with reference to the gas of the position of magnet 5 and counterweight coefficient calculations any position.
Especially; The counterweight coefficient calculations is partly through once rotating the required time with reference to measuring rotary parts 54 from the detection signal of magnetic direction sensor 6 output at a plurality of RP A to H along rotary part 54 sense of rotation, and detection is along the sense of rotation of rotary part 54 angular velocity in a plurality of positions.In the presumptive area on the circumferential direction of rotary part 54 (by the represented zone of k1 to k7 among Figure 17 (b)) (number of times of in this zone, measuring falls in the scope of predetermined difference value), the counterweight coefficient of locating to obtain in the position (ω 1 to ω 7) that detects angular velocity (k1 to k7) is through calculating with reference to reference time and the angular velocity confirmed by the number of times of the scope that falls into predetermined difference value.Counterweight coefficient " k " with respect to other zones (D to H) calculates in an identical manner.
The flow that obtains in the specific location along circumferential direction calculates through using thus obtained " k ", and also obtains along the flow of instantaneous direction acquisition.Therefore, can keep watch on accurate moment flow always, and can handle the unusual increase in the flow quickly.
(the 4th embodiment)
Calculating by flow rate calculation is partly carried out also can be set according to hereinafter.
(1) rotary part 54 once rotates the required time " t " and measures at a plurality of RPs place.Embodiment shown in Figure 17 (a), rotary part 54 once rotate the required time " t " and measure at eight points from A to H.Magnetic direction sensor 6 is measured from magnet 5 for the first time through an A to magnet 5 once more through a time period that A experienced.This metrological operation also carries out at other some places.As first embodiment, the flow value Q (Q that obtains at corresponding RP place
A, Q
B, Q
C, Q
D, Q
E, Q
F, Q
G, Q
H) calculate by (formula 2).
(2) angular velocity omega (ω that realizes at corresponding RP place
A, ω
B, ω
C, ω
D, ω
E, ω
F, ω
G, ω
H) detect by magnetic direction sensor 6.
(3) detected angular velocity omega is considered to remain in the preset range apart from each RP in (2).(1) the counterweight coefficient " k " that adopts in is confirmed according to the angular velocity omega of each the RP place acquisition in being included in this scope and the flow value of in (1), confirming (1).These operations are carried out corresponding to each scope.In the embodiment shown in Figure 18, suitable angular velocity is considered to be in that intermediate point place between the corresponding RP obtains.Specifically, flow is described below and confirms.
Q
A＝k
A×V×10×ω
A
Q
B＝k
B×V×10×ω
B
Q
C＝k
C×V×10×ω
C
Q
D＝k
D×V×10×ω
D
Q
E＝k
E×V×10×ω
E
Q
F＝k
F×V×10×ω
F
Q
G＝k
G×V×10×ω
G
Q
H=k
H* V * 10 * ω
H(formula 4)
Like the situation of the 3rd embodiment, the structure boundary between counterweight coefficient calculations part and the flow rate calculation part is not clear and definite.Especially, the counterweight coefficient calculations is partly through once rotating the required time with reference to measuring rotary part 54 from the detection signal of magnetic direction sensor 6 outputs at a plurality of RP A to H along rotary part 54 sense of rotation; And angular velocity omega is detected at RP A to the H place at rotary part 54
ATo ω
HBe associated with each presumptive area (regional k Figure 18 along the circumferential direction of rotary part 54 from corresponding RP A to H
ATo k
H), use and once rotate the counterweight coefficient of required time and angular speed calculation corresponding to the reference in this zone.
In the present embodiment, calculated amount is littler than the calculated amount that needs among first embodiment.Can reduce to be applied to the burden on counterweight coefficient calculations part and the flow rate calculation part.In addition, but also cutting down cost.And, can reduce the consumed current amount, and can realize that cost reduces through minimizing of battery.
(the 5th embodiment)
The calculating of flow rate calculation part also can be set as follows.
(1) rotary part 54 once rotates place's measurement in a plurality of arbitrfary point of required time " t ", like the situation of the step among the above-mentioned embodiment (1).
(2) likewise, once rotating the required time measures in identical position continuously.The flow value Q that obtains at the place, arbitrfary point is considered to confirm as V/t according to once rotating the required nearest time " t ", confirms the flow value Q at each some place thus.In this case, do not confirm counterweight coefficient " k ".Reseted when once rotating at the flow value Q that obtains during the above-mentioned rotation at every turn, confirmed nearest flow value Q thus.
In the present embodiment, the notion that does not have " counterweight coefficient ".Therefore, counterweight coefficient calculations part does not need, and flow rate calculation is partly carried out the aforementioned calculation operation.
Even in the present embodiment, calculated amount is compared also and can be reduced with the 3rd embodiment.The burden that is applied on the flow rate calculation part can reduce.In addition, can realize that also cost descends.
In the present embodiment, stoichiometric point is not arbitrarily, will measure the time as a reference in, can confirm the predetermined reference point of unlimited amount.At first, confirm a plurality of RPs in identical distance, and measure.The time " t " of when the measured time has fallen in the scope of predetermined difference value, having obtained at RP A place is divided by arbitrary value N.Distance reference point A is that the position in the time interval of t/N is considered to the RP corresponding to a plurality of value N once more.Through aforesaid operations, under the situation of not using counterweight coefficient " k ", set RP, be the constant motion of speed as once rotating, and carry out metering.Thus, the flow Q ' that obtains during random time between RP can confirm accurately, even when flow Q that the RP place that related to before moment obtains.
(the 6th embodiment)
Shown in figure 19, in the present embodiment, use four lead-in wire switch 6A to 6D, and do not use magnetic direction sensor 6.Lead-in wire switch 6A to 6D is positioned at the time interval that equates near rotating circular disk 54b outer peripheral of rotary part 54.
The lead-in wire switch is small-sized electronic unit, perhaps is used for through combining permanent magnet to detect the opening and closing action as proximity transducer.Article two, lead-in wire (magnetic material) is sealed in the glass tube with inert gas.When magnet near when lead-in wire, thereby two lead-in wires are magnetized and attract each other, and close contact point thus.When magnet when the lead-in wire switch separates, two lead-in wires are separated from each other.Through using this attribute, the lead-in wire switch is widely used as proximity transducer, is used to detect the rotation in fields such as automobile, OA equipment, Medical Devices, miniaturized electronics.
In the present embodiment, four lead-in wire switch 6A to 6D are separated from each other 90 ° position in the sense of rotation with respect to rotary part 54 and are set to the switch that goes between.Specifically, lead-in wire switch 6A to 6D is supported by the upper end that is formed on the pillar 56 on the bearing support 29 regularly; Be positioned at the outer peripheral outside of the rotating circular disk 54b of rotary part 54; And its position does not contact outward flange.
In this embodiment, the calculating of partly being carried out by flow rate calculation realizes through using the computing method described in the 3rd embodiment as follows.
(1) like the situation of the step (1) of previous embodiment, four lead-in wire switches are measured once rotating the required time " t " of rotary parts 54.
(2) similarly, the switch that goes between is accordingly measured rotary part continuously and is once rotated the required time.The flow value Q that is obtained at arbitrfary point place by the lead-in wire switch is considered to from once rotating the V/t that the required nearest time " t " calculates, the flow value Q in confirming at every thus.In this case, do not confirm counterweight coefficient " k ".In addition, the flow value Q of previous rotation resets when once rotating at every turn, therefore confirms nearest Q.
Even in the present embodiment, the point of waiting to be provided with the lead-in wire switch can be worth and confirms by the time that will record as a reference, like the situation among the 3rd embodiment.During beginning, a plurality of RPs confirm that with equal intervals the lead-in wire switch is positioned at corresponding RP place.Carry out metering then.Fall into time " t " that the RP A place of predetermined difference value scope obtains divided by arbitrary value N in the time.Position with time interval t/N distance reference point A is considered to the reference corresponding to a plurality of value N once more, and location lead-in wire switch.Through aforesaid operations, under the situation of not using counterweight coefficient " k ", set RP, be the constant motion of speed as once rotating, and carry out metering.Thus, the flow Q ' that the random time between RP is obtained can confirm accurately, even when flow Q that the RP place that related to before moment obtains.
(instantiation)
The particular instance metering of using the described method of the 3rd embodiment to carry out will be described below.
Q
A(0 ° of angle)=30L/h
Q
B(45 ° of angles)=30.5L/h
Average Q '=30.25L/h
Error 0.5L/h＜1L/h (in the preset range of 1L/h)
V＝0.6L
Q
AWith Q
BBetween angular velocity omega:
0 to 15 °: ω=5 k=1.008
15 to 30 °: ω=5.1 k=0.988
30 to 45 °: ω=4.9 k=1.029
In the above-described embodiments, at 0 to 15 °: under the situation of ω=20, use k=1.008, gas is through measuring the traffic flow with 120.96L/h.
Round-shaped when in the above-described embodiments, rotary part 54 employing planes are watched.The shape of rotary part 54 is not limited to circle, and can be circular basically.Under any circumstance, need and to revise the circumferential speed of rotary part 54 through using counterweight coefficient " k ", thereby reflect correct instantaneous delivery.Though magnetic direction sensor 6 is positioned on the rotation center axis of rotary part 54, sensor can be located substantially on rotation center.With the magnetic direction sensor center of being arranged at not is necessary.Therefore, the distance between magnetic sensor 6 and the magnet 5 need not be equal on the sense of rotation of rotary part 54.
In the 3rd to the 6th embodiment, when this position component to be detected and motion were observed with simulated mode, the difference in the rotation of rotary part was improved through using counterweight coefficient and additive method.Therefore, can keep watch on the accurate instantaneous delivery of fluid, the unusual increase in the flow also can be handled more quickly always.
Flowmeter of the present invention is not limited to the diaphragm type aerometer shown in the foregoing description, and also can be applied to various types of other aerometers.
Flowmeter of the present invention is not limited to aerometer, also can be used as the device of measuring various types of other fluids such as the flow of gas, liquid etc.Therefore, any restriction is not made in the application of flowmeter.
State in the use in the flowmeter of single magnet of embodiment, can use a plurality of magnets.In this case, the number of signals from the output of magnetic direction sensor increases or the lead-in wire switch of use above one.
Though the foregoing description uses the combination of magnet and magnetic direction sensor, also can be to use the direction sensor that is furnished with any parts to be detected and can detects this parts direction.
Above-mentioned explanation has shown the instance of diaphragm type aerometer, wherein, forms valve portion by two pivot valves, is used for being fed into two measurement chamber and discharging from two measurement chamber through the pivot action pilot-gas.But the present invention also can be applied to the diaphragm type aerometer, and valve portion is wherein formed by rotary valve, is used for being supplied to four measurement chamber and discharging from measurement chamber by the rotary manipulation pilot-gas.
Though the foregoing description has illustrated the situation that the present invention is applied to the diaphragm type aerometer with four measurement chamber and a pair of film portion, the present invention also can be applied to the diaphragm type aerometer with two measurement chamber and independent film portion.
Though each embodiment of the present invention describes at present, the present invention is not limited to the content explained among these embodiment.The distortion that those skilled in the art imagine based on the scope of claim, instructions and known technology and use all can be by the present invention relates to, and fall into the scope of requirement protection of the present invention.
The present invention requires Japanese patent application No.2004-283472; The right of priority of No.2004-283601 and No.2004-283602, they are all submitted to and its complete content is quoted and is incorporated into this on September 29th, 2004.
Industrial applicability
Flowmeter of the present invention uses parts to be detected and direction sensor, confirms the relative position between them thus.Therefore, measure the flow of fluid.Therefore, strengthen the metering resolution, and can realize accurate metering.
Claims (2)
1. flowmeter comprises:
Main body;
Be fixed to the film portion of said main body, this film portion is defined for the measurement chamber of holding and discharging fluid;
Be used for converting the to-and-fro movement of said film portion into rotatablely move movement conversion part;
Be fixed in one of them parts to be detected of said main body and film portion;
Be fixed in wherein another direction sensor of said main body and film portion, this sensor is about position component to be detected; And
The flow rate calculation part, this part detects said position component to be detected by the detection signal from said direction sensor output, and calculates the flow of said fluid.
2. flowmeter according to claim 1,
Wherein, said parts to be detected are the magnets that are fixed to said film portion,
Wherein, said direction sensor is the magnetic direction sensor.
Applications Claiming Priority (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP283601/04 | 2004-09-29 | ||
| JP2004283602A JP2006098184A (en) | 2004-09-29 | 2004-09-29 | Flow measuring instrument |
| JP283472/04 | 2004-09-29 | ||
| JP283602/04 | 2004-09-29 | ||
| JP2004283601A JP2006098183A (en) | 2004-09-29 | 2004-09-29 | Flow measuring instrument |
| JP2004283472A JP2006098176A (en) | 2004-09-29 | 2004-09-29 | Flow measuring instrument |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200580032337XA Division CN101027539B (en) | 2004-09-29 | 2005-09-29 | Flow measuring instrument |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101504296A CN101504296A (en) | 2009-08-12 |
| CN101504296B true CN101504296B (en) | 2012-05-09 |
Family
ID=36238151
Family Applications (4)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200580032337XA Expired - Fee Related CN101027539B (en) | 2004-09-29 | 2005-09-29 | Flow measuring instrument |
| CN2009101199524A Expired - Fee Related CN101504296B (en) | 2004-09-29 | 2005-09-29 | Flow rate measuring device |
| CN2009101578696A Expired - Fee Related CN101598584B (en) | 2004-09-29 | 2005-09-29 | Flow measuring instrument |
| CN2009101578681A Expired - Fee Related CN101598583B (en) | 2004-09-29 | 2005-09-29 | Flow measuring instrument |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200580032337XA Expired - Fee Related CN101027539B (en) | 2004-09-29 | 2005-09-29 | Flow measuring instrument |
Family Applications After (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009101578696A Expired - Fee Related CN101598584B (en) | 2004-09-29 | 2005-09-29 | Flow measuring instrument |
| CN2009101578681A Expired - Fee Related CN101598583B (en) | 2004-09-29 | 2005-09-29 | Flow measuring instrument |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2006098183A (en) |
| CN (4) | CN101027539B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102374880B (en) * | 2010-08-13 | 2013-01-02 | 同方威视技术股份有限公司 | Gas flowmeter, ion migration-based portable detection equipment, and method for measuring gas flow |
| TWI716086B (en) * | 2019-08-23 | 2021-01-11 | 和旺昌噴霧股份有限公司 | Flowmeter |
| CN113332549B (en) * | 2021-05-19 | 2022-06-03 | 吉林大学 | Oxygen supply device for nursing megaloblastic anemia |
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-
2004
- 2004-09-29 JP JP2004283601A patent/JP2006098183A/en active Pending
-
2005
- 2005-09-29 CN CN200580032337XA patent/CN101027539B/en not_active Expired - Fee Related
- 2005-09-29 CN CN2009101199524A patent/CN101504296B/en not_active Expired - Fee Related
- 2005-09-29 CN CN2009101578696A patent/CN101598584B/en not_active Expired - Fee Related
- 2005-09-29 CN CN2009101578681A patent/CN101598583B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4565090A (en) * | 1983-10-17 | 1986-01-21 | Motohiro Gotanda | Detection device for detecting and indicating operation of a gas meter |
| CN1207495A (en) * | 1997-08-04 | 1999-02-10 | 李揆兴 | Measure driving apparatus and measure signal generating apparatus using wave of inclined rotor |
Non-Patent Citations (1)
| Title |
|---|
| JP特开2004-184308A 2004.07.02 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101598584B (en) | 2011-03-23 |
| CN101027539B (en) | 2010-05-05 |
| CN101598584A (en) | 2009-12-09 |
| CN101027539A (en) | 2007-08-29 |
| CN101504296A (en) | 2009-08-12 |
| JP2006098183A (en) | 2006-04-13 |
| CN101598583B (en) | 2011-01-26 |
| CN101598583A (en) | 2009-12-09 |
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