CN203519074U - Ultrasonic flowmeter device and ultrasonic flowmeter - Google Patents
Ultrasonic flowmeter device and ultrasonic flowmeter Download PDFInfo
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- CN203519074U CN203519074U CN201320259942.2U CN201320259942U CN203519074U CN 203519074 U CN203519074 U CN 203519074U CN 201320259942 U CN201320259942 U CN 201320259942U CN 203519074 U CN203519074 U CN 203519074U
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Abstract
The utility model provides an ultrasonic flowmeter device used for measuring liquid flow rate. The device comprises a circuit board (502) comprising an electric circuit, a first ultrasonic transducer (506) and a first conductive path (564) electrically connected with the first ultrasonic transducer and the electric circuit; the circuit board is a multi-layer circuit board; and at least a part of the first conductive path (564) is arranged between a first layer (581) and a second layer (582). In another embodiment, the utility model provides an upper conductive layer (586) and/or a lower conductive layer (588), wherein the upper conductive layer and the lower conductive layer respectively largely cover the upper surface of the first layer (581) and the lower surface of the second layer (582).
Description
Technical field
The present invention relates to a kind of ultrasonic flow rate counter device.This device has been equipped with a multilayer circuit board, and on this circuit board, adopts electric means to connect and fixed a ultrasonic transducer.
Background technology
This ultrasonic flowmeter is comprised of following part: be furnished with one or more ultrasonic transducers and for the device of sending and receiving ultrasonic signal for one, and an electronic circuit that operation ultrasonic transducer is used.An example of this ultrasonic flow rate counter device has been described in WO2010/112030A1.This is conducive to provide the device through further improvement.
Utility model content
The present invention relates to a kind of ultrasonic flow rate counter device.In an example of the present invention, a kind of ultrasonic flow rate counter device is provided, this ultrasonic flow rate counter device is arranged to measure flow rate of liquid, and this device comprises the first ultrasonic transducer that is equipped with the first electric terminal and the second electric terminal; And circuit board, the multilayer circuit board that it at least consists of ground floor and the second layer; Wherein, circuit board comprises and is arranged on circuit board, for operating an electronic circuit of the first ultrasonic transducer; And the first conductive path being electrically connected with the first electric terminal and electronic circuit; The second conductive path being electrically connected with the second electric terminal; Wherein, ultrasonic transducer is the monolithic body that piezoelectric is made, it has a surface to contact with the surface of circuit board first, and this monolithic body is mechanically fixed on circuit board by following manner: between the first electric terminal and the first conductive path, provide electrical connection conduction fixed form and/or, the conduction fixed form of electrical connection is provided between the second electric terminal and the second conductive path; Wherein, the first conductive path is at least partly arranged between ground floor and the second layer.Because the first electric path is structurally shielded by ground floor and the second layer, comparatively be difficult for being affected by the electromagnetic interference (EMI) of external electromagnetic field, therefore, can think that the way that the first conductive path is arranged between ground floor and the second layer is at least partly a kind of improvement.This can realize the higher quality of data.
The first conductive path can be used for along the direction conduction current between ground floor and the second layer that is parallel to circuit board plane, and can be by one or more through holes (for example: micro through hole) the first conductive path is connected on the first electric terminal and/or electronic circuit.
In exemplary embodiment, " conduction fixed form " can be regarded as one of following mode: scolder, conducting resinl mixture, conductive clip.Can use these dissimilar fixed forms to fix first and second electric terminal with corresponding the second ultrasonic transducer that is connected the first ultrasonic transducer and may exists.
Generally speaking, " multilayer " circuit board is understood to a kind of circuit board for example, with a plurality of layers (: ground floor and the second layer).These layers can be arranged in parallel.Wherein one or more layers can have electrical insulating property.In special example, multilayer circuit board can consist of a substrate, and this substrate is made by multilayer printed circuit, and by multi-layer insulation, these circuit layers is isolated.
Generally, can think that this device may also comprise second ultrasonic transducer; In this ultrasonic transducer, electronic circuit has been carried out to further layout, to move first and second ultrasonic transducer simultaneously.
In an example, provide a kind of ultrasonic flow rate counter device; In this device: the upper surface of ground floor has the surface normal away from the second layer, and the lower surface of the second layer has the surface normal away from ground floor; In addition, a upper conductive layer (for example: a metal level) cover the overwhelming majority of ground floor upper surface, and/or a lower conductiving layer (a for example metal level) covers the overwhelming majority of second layer lower surface.In an instantiation, upper conductive layer and lower conductiving layer have carried out being electrically connected (for example: by limit portion or by the one or more through holes through each layer, be electrically connected).For external electromagnetic field, upper conductive layer or lower conductiving layer have at least carried out partly shielding effect to the first conductive path; Otherwise external electromagnetic field can penetrate ground floor and/or the second layer, and the first conductive path is produced to electric effect, thereby may affect conversely the signal between the first ultrasonic transducer and electronic circuit, and reduce the quality of data.Can think upper conductive layer and/or lower conductiving layer be a solid layer or the interconnection network that adopts conductive path (for example: electrical network) realize.In an instantiation, upper conductive layer and/or lower conductiving layer can play the effect of faraday cup.
In an example, provide a kind of ultrasonic flow rate counter device; In this device, by upper conductive layer and/or lower conductiving layer, provide the second conductive path, or the second conductive path is connected on upper conductive layer and/or lower conductiving layer, thereby makes conductive layer and/or lower conductiving layer realize the electrical connection with the second electric terminal of the first ultrasonic transducer.In this way, the second electric terminal can be connected on metastable current potential; This current potential can be effective as the reference point adopting while measuring other voltage, for example: even if in the situation that upper conductive layer and lower conductiving layer all do not have ground connection, this current potential also can play ground connection acting on effectively.
In an example, provide a kind of ultrasonic flow rate counter device; In this device, the electrical grounding of upper conductive layer and/or lower conductiving layer and electronic circuit is electrically connected.Should note: upper conductive layer and/or lower conductiving layer may be connected on certain external ground device in addition by sleeve pipe.
In an example, provide a kind of ultrasonic flow rate counter device; In this device, the first ultrasonic transducer has comprised a circulating type electrode." circulating type electrode " can be regarded as the electrode that limit portion extends to transducer side or transducer opposite side.It is advantageous that: the electrical path of first and second electric terminal can be provided in the same side of ultrasonic transducer.
In an example, provide a kind of ultrasonic flow rate counter device; In this device: one in circuit board runs through opening substantially for example, around the circuit board first of contiguous the first ultrasonic transducer: all around spend around at least 180 degree, 225 degree, 270 degree, 315 in foregoing circuit plate first; In addition, circuit board second portion is for being connected to above-mentioned first according to mechanical system the remainder of circuit board; Wherein, second portion cross-sectional width is less than the first ultrasonic transducer diameter.The advantage of this way is: circuit board can adapt to thermal expansion and the contraction of piezoelectric ultrasonic transducer element.In some instances, may have electric current flow to remainder from first by second portion." second portion cross-sectional width " can be regarded as the distance of second portion xsect in circuit board plane; Wherein, this xsect is orthogonal with the sense of current that flow to remainder from circuit board first by second portion." the first ultrasonic transducer diameter " can be regarded as the diameter in circuit board plane, or the individual features length of non-circular transducer.
In an example, provide a kind of ultrasonic flow rate counter device; In this device, the distance along second portion from circuit board first to remainder is greater than the first above-mentioned ultrasonic transducer diameter, for example: large 1.5 times, 2 times, 3 times, 4 times, 5 times or 10 times.The advantage of longer second portion is that it can be first and realizes the larger freedom of movement with respect to remainder.But second portion linear pattern, shaped form or segmentation linear pattern.The advantage of nonlinear type second portion is: the movement that it can be first provides the more high-freedom degree with respect to remainder.
In an example, provide a kind of ultrasonic flow rate counter device; In this device, second portion has comprised at least two segmentation straight-line segments, and these two straight-line segments adopt mode at an angle to each other to arrange.
In an example, provide a kind of ultrasonic flow rate counter device; This device has comprised:
-the conduction fixed form of electrical connection is provided between the first electric terminal and the first conductive path
And
-the conduction fixed form of electrical connection is provided between the second electric terminal and the second conductive path;
In this device, above-mentioned conduction fixed form adopts concentric mode mutually to arrange.First and second electric terminal of the first ultrasonic transducer can adopt concentric mode mutually to arrange, and first and second electric terminal can be arranged on the same side of the first ultrasonic transducer.This just can, being two electric terminals only use a transducer side in the situation that, in simple surface mounting technique (SMT) installation process, realize ultrasonic transducer to the complete electrical connection of circuit board.
In an example, provide a kind of ultrasonic flow rate counter device; In this device, have at least first and/or the second layer comprised one or more through holes, for provide from least the first and/or a side of the second layer to the electrical contact of opposite side.
In an example, provide a kind of ultrasonic flowmeter; This flowmeter is arranged to measure flowing through the flow rate of liquid of measuring tube; Wherein, this flowmeter has comprised ultrasonic flow rate counter device.In an example, flowmeter has comprised:
A shell (portion has arranged a measuring tube within it); And
In this device, with respect to shell, ultrasonic flow rate counter device is arranged; Wherein, shell can adopt metal (copper, stainless steel) or polymeric material to make.
From the example of hereinafter describing, can obviously find out the above-mentioned of this invention and other situation, characteristic and/or advantage, and will carry out respective explanations according to these examples.
Accompanying drawing explanation
According to drawing, will only by way of example the example of this invention be described, wherein:
Fig. 1 for example understands a kind of ultrasonic flowmeter;
Fig. 2 has shown the xsect of the ultrasonic flowmeter in Fig. 1;
Fig. 3-Fig. 4 has shown respectively skeleton view and the top view of ultrasonic flow rate counter device before first and second ultrasonic transducer is installed;
Fig. 5-Fig. 7 has shown and has been arranged on the dissimilar ultrasonic transducer on ultrasonic flow rate counter device as shown in Fig. 3-Fig. 4.
Embodiment
Fig. 1 has shown the skeleton view of ultrasonic flowmeter (101): this flowmeter has been equipped with the run through opening (114), that a polymer flow rate meter shell (120), adapt to fluid flow and has been arranged in inner measuring tube (referring to 203 in Fig. 2) and a mechanical individual part as ultrasonic flow rate counter device (100, consist of the circuit board with electronic circuit and piezoelectric ultrasonic transducer).
Fig. 2 has shown the xsect of flowmeter shell shown in Fig. 1; Wherein show that two ultrasonic transducers (206) are installed in circuit board (202) upper, and they are arranged to reverberator by measuring tube (203) at sending/receiving ultrasonic signal each other.
Fig. 3 is the skeleton view of circuit board (302); Wherein, in circuit board (302), run through opening (340) substantially around the first (361) of circuit board (302), and the second portion of circuit board (362) is for being connected to above-mentioned first (361) according to mechanical system the remainder of circuit board.Second portion cross-sectional width (362) is less than the first ultrasonic transducer diameter (306).The advantage of this less second portion width is that second portion will have dirigibility, makes second portion to carry out bending around its end points, thereby first can be moved a little with respect to the remainder of circuit board.First (361) has a central through-hole (330).
Fig. 4 is the top schematic view of ultrasonic flow rate counter device before first and second ultrasonic transducer is installed.The figure illustrates the circuit board (402) that formed by electronic circuit (404), for realizing first conductive path (464), first (461, formed by following part: for realizing the first electrode (471) that the first electric terminal and the first conductive path (464) be electrically connected and the second electrode (472) being electrically connected for realizing the second electric terminal and the second conductive path) of the first electric terminal and the electrical connection of electronic circuit (404) on the first ultrasonic transducer.The first electrode (471) adopts concentric mutually mode to arrange with the second electrode (472).First and second electrode is scolder track, can be used as transducer to be mechanically fixed to the conduction fixed form on circuit board.In addition, this figure shows that first (461) has a central through-hole (430), and around its edge, has one and run through opening (440).Run through opening (440) through arranging, make to connect first (461) and there is piecewise linearity with the second portion (462) of circuit board remainder; Because each piecewise linearity Duan Douke carries out bending around its end points, this just can allow the position of first (461) in more direction, to change to some extent.For example, in the situation that second portion has curve (: second portion has spiral-shaped), also can reach this similar advantage.
Fig. 5-Fig. 7 has shown the viewgraph of cross-section (along section A-A shown in Fig. 4) in circuit board (being similar to the circuit board in Fig. 4) plane.
Fig. 5 has shown the first ultrasonic transducer (506) with the second electric terminal (507) with the first electric terminal (509).This ultrasonic transducer has comprised a circulating type electrode, and therefore the second electric terminal (507) can be effective as the electrode being wrapped on transducer, thereby can on the transducer side identical with the first electric terminal (509), provide electric accessibility.In addition, the figure illustrates the circuit board (502) that the ground floor (581) that shown respectively by dotted line (580) both sides and the second layer (582) form.The first conductive path (564) is electrically connected with the first electric terminal (509), and the first conductive path (564) has been arranged between ground floor (581) and the second layer (582).By the upper conductive layer (586) that has substantially covered ground floor upper surface, provide the second conductive path being electrically connected with the second electric terminal (507).In addition, lower conductiving layer (588) has covered the lower surface of the second layer (582) substantially.This figure has also shown first (561), and it comprises: the first electrode (571), the second electrode (572), central through-hole (530) and run through opening (540) around its edge.A part that has also shown second portion (562) and remainder (563) in figure.In current example, the conduction fixed form of form of solder can adopt mechanical system to fix and provide electrical connection by the first electrode (571) respectively between the first electric terminal (509) and the first conductive path (564) and by the second electrode (572) between the second electric terminal (507) and the second conductive path.
Fig. 6 and Fig. 5 are similar, and difference is: ultrasonic transducer (606) has comprised a limit portion electrode, and therefore the second electric terminal (607) can be effective as the electrode that extends to transducer one side, thereby can provide electric accessibility in this side.Electrical cnnector (611) is electrically connected the second electric terminal (607) and upper conductive layer (686).
Fig. 7 and Fig. 5-Fig. 6 are similar, and difference is: the second electric terminal is arranged on the first ultrasonic transducer side away from circuit board; In the drawings, by clip (710), provide the electrical connection between the second electric terminal (707) and upper conductive layer (786), and that this clip can be used for that the first ultrasonic transducer (706) is carried out to machinery is fixing.
In the example showing at Fig. 4-Fig. 7, the conductive path that the signal of turnover electronic circuit is transmitted is arranged on multi-layer PCB (printed circuit board (PCB)) inside, and for external electromagnetic field, by the conductive earthing layer that covers upper and lower surface, this conductive path is shielded.
Although together with preferred embodiments, invention has been described, this does not also mean that the concrete form that this invention can be confined to proposed herein.Exactly, scope of the present invention is only limited by the claim of attaching.Some detail of the disclosure example proposing in this section, is not in order to limit, but only for for explaining, so that can be clear and understand all sidedly the present invention.Yet those skilled in the art should easily understand: in the situation that significantly do not depart from marrow and the scope of this disclosure, the present invention may and imprecise other example that meets the details of setting forth herein in obtain practical application.In addition under this background and for simplicity, explain lucidly, the detailed description of well-known utensil, circuit and method is omitted, to avoid occurring unnecessary details and possible obscuring.
In the claims, term " comprises " and does not get rid of other element of existence or step.In addition, although may comprise different qualities in different claims, these may be the characteristics through favourable combination, and be included in, do not imply that certain combination of characteristic does not have feasibility and/or profitability in different claims.In addition, odd number is described and is not got rid of plural number.Therefore, plural number is not got rid of in the description such as " ", " a kind of ", " first ", " second ".In the claims, comprise reference symbol, but comprise these reference symbols, be only used to realize distinct explanation, should be interpreted as the scope of claim to limit.
Claims (13)
1. ultrasonic flow rate counter device (100): this ultrasonic flow rate counter device is arranged to measure a flow rate of liquid, it is characterized in that, this device comprises:
Be equipped with first ultrasonic transducer (506) of the first electric terminal (509) and the second electric terminal (507); And
Circuit board (502), the multilayer circuit board that it at least consists of ground floor (581) and the second layer (582); Wherein, circuit board (502) comprises:
-be arranged on circuit board, for operating an electronic circuit (404) of the first ultrasonic transducer (506); And
-the first conductive path (564) of being electrically connected with the first electric terminal and electronic circuit;
-the second conductive path of being electrically connected with the second electric terminal;
Wherein, ultrasonic transducer (506) is the monolithic body that piezoelectric is made, and it has a surface to contact with the surface of circuit board (502) first (561), and this monolithic body is mechanically fixed on circuit board by following manner:
-the conduction fixed form (710) of electrical connection is provided between the first electric terminal and the first conductive path
And/or
-the conduction fixed form of electrical connection is provided between the second electric terminal and the second conductive path;
Wherein, the first conductive path is at least partly arranged between ground floor and the second layer.
2. ultrasonic flow rate counter device according to claim 1 (100), is characterized in that, in this device: the upper surface of ground floor (581) has the surface normal away from the second layer; The lower surface of the second layer (582) has the surface normal away from ground floor; Upper conductive layer (586) has covered the overwhelming majority of ground floor upper surface, and/or lower conductiving layer (588) has covered the overwhelming majority of second layer lower surface.
3. ultrasonic flow rate counter device according to claim 2 (100), it is characterized in that, in this device: provide the second conductive path by upper conductive layer (586) and/or lower conductiving layer (588), or the second conductive path is connected on upper conductive layer (586) and/or lower conductiving layer (588).
4. according to the ultrasonic flow rate counter device (100) described in any one in claim 2 or 3, it is characterized in that, in this device: upper conductive layer (586) and/or lower conductiving layer (588) are electrically connected with the electrical grounding of electronic circuit (404).
5. ultrasonic flow rate counter device according to claim 1 (100), is characterized in that, in this device: the first ultrasonic transducer has comprised a circulating type electrode.
6. ultrasonic flow rate counter device according to claim 1, it is characterized in that, in this device: the conduction fixed form of electrical connection is being provided and/or is providing the conduction fixed form of electrical connection at least to comprise one of following between the first electric terminal and the first conductive path between the second electric terminal and the second conductive path: scolder, conducting resinl mixture, conductive clip.
7. ultrasonic flow rate counter device according to claim 1 (100), is characterized in that, in this device: the second electric terminal (509) is arranged on the first ultrasonic transducer side away from circuit board (502); Between the second electric terminal and the second conductive path on the first ultrasonic transducer side away from circuit board (502), provide electrical connection.
8. ultrasonic flow rate counter device according to claim 1 (100), it is characterized in that, in this device: one in circuit board (502) runs through opening (540) substantially around circuit board (102) first (561) of contiguous the first ultrasonic transducer (506); Circuit board second portion (562) is for adopting mechanical system above-mentioned first to be connected to the remainder of circuit board; Wherein second portion cross-sectional width is less than the first ultrasonic transducer diameter.
9. ultrasonic flow rate counter device according to claim 8 (100), is characterized in that, in this device: the first (561) along second portion (562) from circuit board is greater than the first above-mentioned ultrasonic transducer diameter to the distance of remainder.
10. ultrasonic flow rate counter device according to claim 8 or claim 9, is characterized in that, in this device: second portion (562) has comprised at least two segmentation straight-line segments, these two straight-line segments adopt mode at an angle to each other to arrange.
11. ultrasonic flow rate counter devices according to claim 1 (100), is characterized in that, this device comprises:
-the conduction fixed form (710) of electrical connection is provided between the first electric terminal and the first conductive path
And
-the conduction fixed form of electrical connection is provided between the second electric terminal and the second conductive path;
In this device, above-mentioned conduction fixed form adopts concentric mode mutually to arrange.
12. ultrasonic flow rate counter devices according to claim 1 (100), it is characterized in that, in this device: have at least first and/or the second layer comprised one or more through holes, for provide from least the first and/or a side of the second layer to the electrical contact of opposite side.
13. 1 kinds of ultrasonic flowmeters (101), this ultrasonic flowmeter is arranged to measure flowing through the flow rate of liquid of measuring tube; It is characterized in that, wherein, this flowmeter has comprised the ultrasonic flow rate counter device (100) that meets claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320259942.2U CN203519074U (en) | 2013-05-14 | 2013-05-14 | Ultrasonic flowmeter device and ultrasonic flowmeter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320259942.2U CN203519074U (en) | 2013-05-14 | 2013-05-14 | Ultrasonic flowmeter device and ultrasonic flowmeter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203519074U true CN203519074U (en) | 2014-04-02 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320259942.2U Expired - Lifetime CN203519074U (en) | 2013-05-14 | 2013-05-14 | Ultrasonic flowmeter device and ultrasonic flowmeter |
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| Country | Link |
|---|---|
| CN (1) | CN203519074U (en) |
-
2013
- 2013-05-14 CN CN201320259942.2U patent/CN203519074U/en not_active Expired - Lifetime
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140402 |