CN202522269U - Electronic unit for flow measurement and flow measuring device - Google Patents
Electronic unit for flow measurement and flow measuring device Download PDFInfo
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- CN202522269U CN202522269U CN2011204400058U CN201120440005U CN202522269U CN 202522269 U CN202522269 U CN 202522269U CN 2011204400058 U CN2011204400058 U CN 2011204400058U CN 201120440005 U CN201120440005 U CN 201120440005U CN 202522269 U CN202522269 U CN 202522269U
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Abstract
The utility model provides an electronic unit for flow measurement and a flow measuring device, wherein the electronic unit is capable of reducing the quantity of parts and realizes miniaturization. The electronic unit comprises a circuit substrate (10), a display part (60) and connector parts (70 and 72), wherein a first surface (SF1) of the circuit substrate (10), which is used as a surface opposite to an impeller, is provided with a magnetic sensor circuit (30) and a processing circuit (32), wherein the magnetic sensor circuit (30) is used for detecting the rotation of the impeller rotating along with the flowing of liquid by magnetic signal sensing; the processing circuit (32) is used for implementing processing and display controlling of signals from the magnetic sensor circuit (30); the display part (60) is arranged at the side of a second surface (SF2) of the back surface of the first surface (SF1) of the circuit substrate (10) and is subjected to display control by the processing circuit (32), thus displaying images; and the display part (60) and the circuit substrate (10) are connected together by the connector parts (70 and 72).
Description
Technical field
The utility model relates to a kind of flow measurement with electronic unit and flow measurement device etc.
Background technology
All the time, the flow measurement device of water meter of detecting of the known flow that the liquid of pair water etc. arranged etc.Mechanical type water meter, hybrid water meter, electronic type (solid state) water meter are arranged in water meter.In the mechanical type water meter, implement the accumulative total of flow through gear, implement the demonstration of flow through mechanical counter.In hybrid water meter, through gear and MCU (Micro Controller Unit: micro controller unit) implement the accumulative total of flow, through mechanical counter and LCD (Liquid Crystal Display: LCD) implement the demonstration of flow.In electric water meter,, implement the demonstration of flow through LCD through the accumulative total that MCU implements flow.As the prior art of electric water meter, has for example patent documentation 1 disclosed technology.
Yet in electric water meter so far, sensor is an individualism separately with substrate and electronic component-use substrate, and in addition, according to the difference of product, substrate for display also has individualism separately.Therefore, structure more complicated.In addition, because number of components also can increase, therefore become the reason of expensiveization.In addition, since bigger as the power consumption of electronic unit, therefore need high capacity and large-scale battery.Therefore, exist shape of product also must become big problem.
Technical literature formerly
Patent documentation
Patent documentation 1: TOHKEMY 2005-292096 communique
The utility model content
According to several kinds of modes of the utility model, can provide a kind of flow measurement of miniaturization etc. of having cut down number of components and having realized the unit with electronic unit and flow measurement device etc.
A kind of mode of the utility model relates to a kind of flow measurement and uses electronic unit; It comprises: circuit substrate, and its conduct is provided with first face of opposed of impeller: the signal impression through magnetic comes the magnetic sensor circuit that the rotation of following the said impeller that flowing of liquid rotate is detected and implements the treatment circuit from the Signal Processing and the demonstration control and treatment of said magnetic sensor circuit; Display part, it is set at second side at said first back side of said circuit substrate, and is implemented to show control through said treatment circuit, thus display image; Connector portion, it links together said display part and said circuit substrate.
In a kind of mode of the utility model, magnetic sensor circuit and implementing from the Signal Processing of magnetic sensor circuit and show the treatment circuit of control and treatment, be set at conduct and opposed of impeller, on first of circuit substrate.In addition, thereby implement to be shown the display part of control display image through treatment circuit, be set on second of circuit substrate.And, also be provided with the connector portion that display part and circuit substrate are linked together.Adopt this kind structure, the signal impression of magnetic that can be through being arranged at the magnetic sensor circuit on first of circuit substrate, thus the rotation of impeller is detected, and can in treatment circuit, handle the signal from magnetic sensor circuit.And, can be connected carrying out signal via connector portion with display part from the signal of handling circuit, thus on display part display image.At this moment, in a kind of mode of the utility model, adopted on first of circuit substrate magnetic sensor circuit and treatment circuit have been set, and as the structure that display part is set on second of first the back side.Therefore, can provide a kind of following flow measurement to use electronic unit, it suppresses number of circuit substrate etc. in Min., thereby has cut down number of components and realized miniaturization of unit etc.
In addition, in a kind of mode of the utility model, also can adopt following mode; Promptly; Comprise battery, said battery is used to supply with the power supply of said magnetic sensor circuit and said treatment circuit, and said battery is set between said circuit substrate and the said display part.
Adopt this kind mode, between circuit substrate and display part, disposed battery, thus can magnetropism sensor and treatment circuit supply power.In addition, as battery, for example adopting, the battery of compact form such as button cell also becomes easy.
In addition, in a kind of mode of the utility model, also can adopt following mode; Promptly; Said treatment circuit has, and is connected with a plurality of sensors and uses signal terminal with a plurality of sensors of signal wire, and a plurality of said sensors link together said magnetic sensor circuit and said treatment circuit with signal wire; A plurality of said sensors are set at signal terminal, in the limit of said treatment circuit with opposed first limit of said magnetic sensor circuit on.
Adopt this kind mode, can utilize short path to connect the sensor that magnetic sensor circuit and treatment circuit are linked together and use signal wire, thereby realize simplification of the distribution in the circuit substrate etc.
In addition, in a kind of mode of the utility model, also can adopt following mode; Promptly; Said treatment circuit has, and is connected with a plurality of display parts and uses signal terminal with a plurality of display parts of signal wire, and a plurality of said display parts link together said treatment circuit and said display part with signal wire; Said display part is set at signal terminal, at least one limit in second limit of said treatment circuit, the 3rd limit and the 4th limit.
Adopt this kind mode, can utilize treatment circuit second, third, at least one limit in the 4th limit, and the display part that treatment circuit and display part are linked together is carried out distribution with signal wire, thereby has realized simplification of the distribution in the circuit substrate etc.
In addition; In a kind of mode of the utility model, also can adopt following mode, promptly; A plurality of sensors that said magnetic sensor circuit and said treatment circuit link together are used signal wire, mutually not across by distribution on said first of said circuit substrate.
Adopt this kind mode, can suppress following situation, that is, the sensor that magnetic sensor circuit and treatment circuit are linked together with signal wire on parasitism for example stray capacitance etc. is arranged, thereby make the situation of deteriorations such as signal quality.
In addition, in a kind of mode of the utility model, also can adopt following mode, that is, said magnetic sensor circuit is set at and is installed in the corresponding primary importance of the magnet place on the said impeller on said first of said circuit substrate.
Adopt this kind mode, can be through being set at the magnetic sensor circuit with the corresponding primary importance of magnet place, thus rightly to carrying out signal impression, can the rotation of impeller be detected thus from the magnetic that is installed in the magnet on the impeller.
In addition, in a kind of mode of the utility model, also can adopt following mode, that is, said treatment circuit is set at from said primary importance and only separates the second place to set a distance on said first of said circuit substrate.
Adopt this kind mode, can be in the primary importance place that magnetic sensor circuit is configured in the rotation that can detect impeller rightly, utilize short path and will input to treatment circuit from the signal of magnetic sensor circuit.
In addition, in a kind of mode of the utility model, also can adopt following mode; Promptly; In the first direction side of said magnetic sensor circuit and said treatment circuit, be provided with first connector portion as said connector portion, when the reverse direction with said first direction is set at second direction; Said second direction side at said magnetic sensor circuit and said treatment circuit is provided with second connector portion as said connector portion.
Adopt this kind mode, can be with being passed to display part via first, second connector portion from the signal of handling circuit.
In addition; In a kind of mode of the utility model, also can adopt following mode, promptly; Said display part only separates the position to set a distance through said first connector portion and said second connector portion and be supported in from said second face of said circuit substrate.
Adopt this kind mode, can come display part is supported and display part is fixed on the circuit substrate with first, second connector portion as support unit.
In addition, in a kind of mode of the utility model, also can adopt following mode, that is, on said first connector portion and said second connector portion, distribution has a plurality of display parts that said treatment circuit and said display part are linked together to use signal wire.
Adopt this kind mode, can be when display part being supported through first, second connector portion, with signal wire display part and the treatment circuit etc. of implementing the demonstration control of display part are carried out signal via display part and be connected.
In addition, in a kind of mode of the utility model, also can adopt following mode, that is, on said circuit substrate, be provided with damp proof parts with the mode that covers said magnetic sensor circuit and said treatment circuit.
Adopt this kind mode, can protect the influence that magnetic sensor circuit, treatment circuit are avoided moisture that the liquid from impeller side produces etc.
In addition, the another kind of mode of the utility model relates to a kind of flow measurement device, and it comprises: electronic unit is used in the described flow measurement of arbitrary mode in the aforesaid way; Said impeller.
Description of drawings
Fig. 1 is the stereographic map of the flow measurement of this embodiment of expression with the structure example of electronic unit.
Fig. 2 is the stereographic map of the flow measurement of this embodiment of expression with the cell arrangement of electronic unit.
Fig. 3 is flow measurement from this embodiment of the beneath stereographic map during with electronic unit.
Fig. 4 is the stereographic map of an example of expression connector portion.
Fig. 5 has the stereographic map of flow measurement with the structure example of the flow measurement device of electronic unit for expression.
Fig. 6 has the stereographic map of flow measurement with the structure example of the flow measurement device of electronic unit for expression.
Fig. 7 has the exploded perspective view of flow measurement with the flow measurement device of electronic unit.
Fig. 8 is the structure example of treatment circuit.
The key diagram of the method that Fig. 9 detects the rotation of impeller for the signal impression through magnetic.
Figure 10 is the structure example and the action specification figure of magnetic sensor circuit.
Figure 11 is used for the signal waveforms that the action to magnetic sensor circuit describes.
Figure 12 is the signal wiring example of circuit substrate.
Figure 13 is the key diagram of the method when utilizing damp proof parts to cover magnetic sensor and treatment circuit.
Embodiment
Below, the preferred implementation of the utility model is elaborated.In addition; Below this illustrated embodiment; Can not be interpreted as the embodiment that the content of the utility model that is used for the scope of claim is put down in writing is carried out unreasonable qualification; Illustrated structure in this embodiment is not as the solution of the utility model and necessary structure entirely.
1. electronic unit is used in flow measurement.
Fig. 1, Fig. 2, Fig. 3 are the stereographic map of the flow measurement of this embodiment of expression with the structure example of electronic unit.Fig. 2 is the stereographic map of the configuration of expression battery 20.Fig. 3 is the A1 direction from Fig. 1, the stereographic map during promptly from beneath.In addition, the flow measurement of this embodiment is not limited to the structure of Fig. 1, Fig. 2, Fig. 3 with electronic unit, and it can be implemented to omit the part of its textural element or append the various changes of other textural elements etc.
The flow measurement of this embodiment comprises with electronic unit: circuit substrate 10, display part 60, connector portion 70,72.In addition, as shown in Figure 2, electronic unit comprises battery 20.
As shown in Figure 3, on first SF1 of circuit substrate 10, be provided with magnetic sensor circuit 30 and treatment circuit 32.In addition, on first SF1, also be provided with EEPROM34 as non-volatile storage part.In addition, the various passive devices of capacitor, resistive element etc. can also be set on circuit substrate 10, and be used to connect and the outside between the connector etc. of signal.At this, first SF1 do, the mode of stating later on shown in Figure 5 and with opposed of impeller 90 (vane) (face of impeller side).If with Fig. 5 is example, then be face towards the below.
Particularly, realize each IC (IC apparatus) of each circuit of magnetic sensor circuit 30, treatment circuit 32, EEPROM34, be installed on first SF1 of circuit substrate 10.On these each IC, so that each chip (semi-conductor chip) of each circuit of realizing magnetic sensor circuit 30, treatment circuit 32, EEPROM34 to be installed by the mode of coverings such as mold.In addition, also can utilize bare chip that magnetic sensor circuit 30, treatment circuit 32, EEPROM34 are installed.In addition, though in Fig. 3, magnetic sensor circuit 30 and treatment circuit 32 through separately independently IC realize, also can realize magnetic sensor circuit 30 and treatment circuit 32 through the IC of a chip.In this case, magnetic sensor circuit 30 and treatment circuit 32 in the IC of this chip also are set on first SF1 of circuit substrate 10.
As magnetic sensor circuit 30, can use for example MR (MagnetoResistive: sensor etc. magnetic resistance).The MR sensor does, utilized the sensor of the magnetoresistive element that resistance value changes according to the intensity of magnetic (magnetic field).In addition, as magnetic sensor circuit 30, also can use the magnetic sensor of reed switch mode etc.
In addition, as shown in Figure 2, the flow measurement of this embodiment has battery 20 with electronic unit.Particularly, have battery 20 and be used for battery 20 is installed in the battery carrier 22 (installing component of battery) on the circuit substrate 10.Battery 20 is the parts of the power supply that is used to supply with magnetic sensor circuit 30, treatment circuit 32 etc.In Fig. 2,, used button cell (coin shape lithium battery etc.) as battery 20.That is, though in existing electronic unit, be provided with the battery of cylindrical shape, the electronic unit of this embodiment is because the lower and compact shape of power consumption, therefore can use button cell with as battery 20.This battery 20 is fixed through the battery carrier 22 on second SF2 that is set at circuit substrate 10, and is set between circuit substrate 10 and the display part 60.
In addition, as shown in Figure 3, magnetic sensor circuit 30 is set at and is installed on the corresponding primary importance P1 of the magnet place on the impeller on first SF1 of circuit substrate 10.For example, as after state shown in Figure 7, on impeller 90, be equipped with and be used for magnet 92 that its rotation is detected.Particularly, as after state shown in Figure 9, in the position of the turning axle 94 of impeller 90 magnet 92 is installed, and magnetic sensor circuit 30 is through to detecting from variation of the magnetic (magnetic field) of this magnet 92 etc., thereby the rotation of impeller 90 detected.Therefore, as shown in Figure 3, magnetic sensor circuit 30 is set at the magnet 92 corresponding primary importance P1 places with impeller 90.
At this, 92 corresponding primary importance P1 do with magnet, for example overlook when observing (for example the A1 direction from Fig. 3 observe sight line) position with the position consistency (roughly consistent) of magnet 92.Under for example circuit substrate 10 was round-shaped situation, primary importance P1 was round-shaped center.In addition, primary importance P1 is to dispose the representative position (for example becoming the position of configuration center) of magnetic sensor circuit 30.Through configuration magnetic sensor circuit 30, thereby can detect the rotation of impeller 90 rightly at such primary importance P1 place.
In addition, as shown in Figure 3, treatment circuit 32 is set at from primary importance P1 and only separates the second place P2 to set a distance on first SF1 of circuit substrate 10.Under for example circuit substrate 10 was round-shaped situation, second place P2 did, from round-shaped center, be primary importance P1 position spaced.This second place P2 is the representative position of configuration process circuit 32 (for example becoming the position of configuration center).
If at such second place P2 place configuration process circuit 32; Then can be when magnetic sensor circuit 30 being configured in the primary importance P1 place of can be rightly the rotation of impeller 90 being detected, utilize short path and will input to treatment circuit 32 from the signal of magnetic sensor circuit 30.In addition, EEPROM34 is set at from primary importance P1 and only separates the 3rd position P3 to set a distance also on first SF1 of circuit substrate 10.And; When having constituted magnetic sensor circuit 30 with treatment circuit 32 by the IC of a chip as stated; Only need the magnetic sensor circuit in the IC 30 is configured in the primary importance P1 place among Fig. 3, and the treatment circuit in the IC 32 is configured in second place P2 place gets final product.
In addition, as shown in Figure 3, in this embodiment,, be provided with first connector portion 70 as connector portion in the first direction DR1 of magnetic sensor circuit 30 and treatment circuit 32 side.In addition, when the reverse direction with first direction DR1 was set at second direction DR2, the second direction DR2 side at magnetic sensor circuit 30 and treatment circuit 32 was provided with second connector portion 72 as connector portion.That is, with the corresponding position, both sides of magnetic sensor circuit 30 and treatment circuit 32, be provided with first, second connector portion 70,72.And display part 60 only separates the position to set a distance through first connector portion 70 and second connector portion 72 and be supported in from second SF2 of circuit substrate 10.That is, when supporting display part 60, display part 60 is fixed on the circuit substrate 10 via first, second connector portion 70,72 through first, second connector portion 70,72.Through this kind mode; Can first, second connector portion 70,72 be supported display part 60 as support unit; And be fixed on the circuit substrate 10, thereby being carried out signal, the electronic unit of treatment circuit 32 grades on display part 60 and the circuit substrate 10 is connected.
In addition, like Fig. 1, Fig. 2, shown in Figure 3, on first, second connector portion 70,72, the signal wire 74,76 that distribution has a plurality of display parts that treatment circuit 32 and display part 60 are linked together to use.In the hole portion of the column on being arranged at first, second connector portion 70,72 for example, dispose the signal wire 74,76 that display part is used.Adopt this kind mode, can be when supporting display part 60 through first, second connector portion 70,72, the treatment circuit of display part 60 and enforcement being controlled the demonstration of display part 60 via this signal wire 74,76 32 etc. carries out signal and is connected.
Fig. 4 is the stereographic map of an example of employed connector portion 70 (72) in this embodiment of expression.This connector portion 70 is formed by the hard part of for example plastics etc., and portion is provided with signal wire 74 within it.And, the terminal of display part 60 is inserted in the hole portion 77 of the top that is arranged at connector portion 70, and will be arranged at the jut 78 of electric conductivity of the below of connector portion 70, be inserted in the hole portion 14 of circuit substrate 10 of Fig. 1～shown in Figure 3.Through adopting this kind mode, can carry out being connected of signal wire between display part 60 and the circuit substrate 10.And, can be via the printed wiring of circuit substrate 10, and signal wire is connected on treatment circuit 32 grades on first SF1 that is arranged at circuit substrate 10.In addition, the structure of connector portion 70 (72), structure are not limited to mode shown in Figure 4.For example also can use flexible base, board etc. to implement with change as connector portion 70.
The flow measurement of this embodiment with electronic unit in, can realize the solution of low power consumption system through using, thereby form equal system to compare more small-sized battery (for example button cell) with existing battery.In addition, implemented the MCU (treatment circuit) of design of high efficiency of optimization, the terminal arrangement of internal circuit through use, thereby can realize that number of components cuts down the minimizing of going for a stroll of connecting up with circuit substrate.Under such background, the flow measurement of this embodiment with electronic unit in, goes up at a face (first face) of circuit substrate electronic unit is installed, and magnetic sensor circuit (magnetic sensor) is installed by centre portion therein.And another face (second face) side at circuit substrate is provided with display part (display panel), and between circuit substrate and display part, is provided with button cell.
Through adopting this kind mode, need a plurality of circuit substrates only to become one of need get final product all the time.Therefore, can simplify flow measurement with electronic unit and the structure that comprises the flow measurement device of this electronic unit, thereby obtain success in the reduction that realizes cost and the aspects such as miniaturization of system.
2. flow measurement device
Fig. 5, Fig. 6, Fig. 7 are the stereographic map of the flow measurement device of this embodiment.This flow measurement utensil has the flow measurement of this embodiment of Fig. 1～illustrated in fig. 3 to use electronic unit and impeller 90.In addition, also have and be used to shell 102,104 of taking in electronic unit and impeller etc.
Of preamble, the flow measurement of this embodiment has circuit substrate 10, connector portion 70,72 and display part 60 with electronic unit.And as shown in Figure 7, the electronic unit that is made up of these parts is incorporated in the shell 102 of upper side.And, above electronic unit, be provided with cap 100, thus, electronic unit is accommodated in the shell 102 by sealing.In this case, circuit substrate 10 is had, be used for the function that the inside to the shell 104 of the inside of the shell 102 of electronic unit side and impeller 90 sides isolates.That is, circuit substrate 10 is had, make liquid that can not from the inside of the shell 104 of impeller 90 sides be immersed in the isolation features of inside of the shell 102 of electronic unit side.Certainly, the parts of realizing this isolation features also can further be set below circuit substrate 10.
In the flow measurement device of the flow measurement that is provided with this embodiment in the above described manner with electronic unit; Because the number of components of electronic unit is less; And it is simple in structure, therefore can reduce the number of components of flow measurement device itself, and can its structure also be set at simple structure.Thus, can realize the cost degradation of flow measurement device and the raising of reliability etc.In addition, through making the electronic unit miniaturization, thereby also realized the miniaturization of flow measurement device.
In addition, when the flow measurement with this embodiment is applied in the existing flow measurement device (for example buried water meter etc.) with electronic unit, only needs electronic unit with this embodiment be assembled in the shell that constitutes existing flow measurement device and get final product.At this moment, in order to cooperate the size of existing flow measurement device, can tackle through the height of regulating the connector portion 70,72 among Fig. 1.For example under the bigger situation of the size (size on the short transverse) of existing flow measurement device, only need be mated and the length of connector portion 70,72 on short transverse is increased get final product.
3. treatment circuit
Next, employed treatment circuit 32 is elaborated in the electronic unit to this embodiment.Illustrate the structure example of treatment circuit 32 among Fig. 8.In addition, the treatment circuit 32 of this embodiment is not limited to structure shown in Figure 8, and the various changes that also can omit the part of its textural element or append other textural elements etc. are implemented.
The treatment circuit 32 of Fig. 8 comprises: AFE (analog front circuit) 40, CPU42 (processor portion, CPU nuclear), drive circuit 44.In addition, also can comprise I/F (interface) circuit 45, RTC (real-time clock) circuit 46, storage part 48 etc.
AFE40 implements the various simulation process from the signal of magnetic sensor circuit 30.Signal from magnetic sensor circuit 30 is input to AFE40 via a plurality of sensors with signal terminal 50.Particularly, AFE40 is provided with not shown comparator circuit.And, through this comparator circuit, state after implementing shown in Figure 10, from the signal SA of magnetic sensor circuit 30 and the comparison process between the SAN.In addition, also implement from the signal SB of magnetic sensor circuit 30 and the comparison process between the SBN.And, according to the result of these comparison process, detect revolution (anglec of rotation) and the sense of rotation (positive rotation, contrary rotation) etc. of the impeller 90 among Fig. 5.
CPU42 implements various calculation process according to the testing result at AFE40 place, to obtain flow value etc.For example, according to the revolution of impeller 90, and enforcement obtains flow value or obtain the calculation process of instantaneous flow value.In addition, CPU42 implements to be used for processing that overflow, adverse current and leaking etc. detected.
Drive circuit 44 is implemented the demonstration control and treatment of display part 60.Particularly, generate and to be used for driving the segment electrode that is arranged at display part 60 and the drive signal of public electrode.This drive circuit 44 for example can comprise: a plurality of output circuits (output unit), the shared drive signal that it is used to export the drive signal of the section usefulness that is exported to segment electrode and is exported to public electrode; Control circuit, it is controlled this output circuit.These drive signals are exported to display part 60 via a plurality of display parts with signal terminal 52.Particularly, drive signal is transported to display part 60 from display part with signal terminal 52 via connector portion 70,72.Thus, in the viewing area 62 of display part 60, with the various images that show that the flow measurement device is used.
I/F circuit 45 is to realize the for example circuit of the communication interface of SPI, UART, I2C etc.Through this I/F circuit 45, can realize for example wireless long-range table look-up system etc.
RTC (real-time clock) circuit 46 is for implementing the circuit that timing is handled.Through this RTC circuit 46, can be under condition not via CPU42, realize that with low power consumption timing handles.
Storage part 48 is the member of storing various information, and realizes through for example RAM etc.CPU42 implements various processing with this storage part 48 as the operating area.In addition, storage part 48 is also attend institute's images displayed data to display part 60 and is stored.
4. magnetic sensor circuit
Next, the flow measurement to this embodiment is elaborated with employed magnetic sensor circuit 30 in the electronic unit.
Like Fig. 9, shown in Figure 7, in the electronic unit of this embodiment, magnet 92 is installed on the turning axle 94 of impeller 90.And, follow flowing of liquid and when being rotated when impeller 90, the magnet 92 that is installed on the turning axle 94 of impeller 90 also is rotated.Magnetic sensor circuit 30 pairs of this moments, the variation from the magnetic (magnetic field) of magnet 92 detected, thereby the rotation of impeller 90 is detected.
In Figure 10, illustrate the structure example of magnetic sensor circuit 30.The magnetic sensor circuit 30 of Figure 10 is the example of MR sensor, and has magnetic resistive element R1～R4 and R5～R8.These magnetic resistive elements R1～R4, R5～R8 are the resistive element that resistance value changes according to magnetic.Magnetic resistive element R1～R4 is connected to quadrilateral, thereby has constituted first Wheatstone bridge circuit.Likewise, magnetic resistive element R5～R8 also is connected to quadrilateral, thereby has constituted second Wheatstone bridge circuit.
For example, the signal SA of Figure 10, SAN are exported from magnetic sensor circuit 30, and are input to treatment circuit 32.And, of preamble, on the AFE40 of treatment circuit 32, be provided with the comparator circuit of the comparison process of implementing signal SA and SAN, signal SA is input to the non-counter-rotating input terminal of comparator circuit, and signal SAN is input to the counter-rotating input terminal.
And, be set among Figure 10 and produced magnetic field (magnetic flux) H3 with the mode of crossing magnetic resistive element R2, R4.In this case, though the resistance value of R2, R4 is changed to r+ Δ r from r, the resistance value of R1, R3 is still r, does not change.Therefore, the voltage of signal SA that is input to the non-counter-rotating input terminal of above-mentioned comparator circuit rises, and the voltage that is input to the signal SAN of counter-rotating input terminal descends.Its result does, is arranged at the output of the comparator circuit on the AFE40, for example is changed to H level (high level) from L level (low level).
On the other hand, be set among Figure 10 and produced magnetic field (magnetic flux) H1 with the mode of crossing magnetic resistive element R1, R3.In this case, though the resistance value of R1, R3 is changed to r+ Δ r from r, the resistance value of R2, R4 is still r, does not change.Therefore; Because being input to the voltage of signal SA of the non-counter-rotating input terminal of comparator circuit descends; And the voltage that is input to the signal SAN of counter-rotating input terminal rises, so the output of comparator circuit for example is changed to L level (low level) from H level (high level).
In this way, thereby be rotated when being rotated magnet 92 through impeller 90, and magnetic field is when changing with mode shown in Figure 10, the voltage of signal SA, SAN will change thereupon.Therefore, through implementing the comparison process of this signal SA, SAN, thereby can the rotation of impeller 90 be detected.At this moment, even also implement identical detection, therefore can't distinguish positive rotation and contrary rotation because first Wheatstone bridge circuit that is made up of for example magnetic resistive element R1～R4 has rotated in the direction in magnetic field under the situation of 180 degree.About this point; In Figure 10; Except first Wheatstone bridge circuit that constitutes by magnetic resistive element R1～R4; Also be provided with second Wheatstone bridge circuit that constitutes by magnetic resistive element R5～R8, and the configuration direction of R5～R8 45 degree have only been departed from respect to the configuration direction of R1～R4.Thus; Signal SA, the SAN of first Wheatstone bridge circuit that constitutes through free R1～R4 in the future; Combine with signal SB, the SBN of second Wheatstone bridge circuit that comes free R5～R8 to constitute, thereby can also realize difference positive rotation and contrary rotation.In addition, in Figure 11, illustrate the signal waveform example of signal SA, SAN, SB, SBN.In Figure 11, ROTH is the angle of rotating magnetic field, and VPP is the P-to-P voltage of each signal.
5. the signal wiring between magnetic sensor circuit, the treatment circuit
Next, the distribution example to the signal wire between magnetic sensor circuit 30 and the treatment circuit 32 describes.
As shown in Figure 3, in this embodiment, magnetic sensor circuit 30 and treatment circuit 32 are installed on first SF1 of circuit substrate 10.And on first SF1 of circuit substrate 10, distribution has the signal wire (printed wiring) that these magnetic sensor circuits 30 and treatment circuit 32 are linked together.At this moment, simplify to the distribution of circuit substrate 10, be preferably, the distribution of the signal wire between magnetic sensor circuit 30, the treatment circuit 32 is also simplified for the configuration and the signal wire that make electronic parts to circuit board 10.Through adopting this mode, thereby realized that flow measurement is with the simplification of the structure of electronic unit and miniaturization etc.
Particularly, as shown in Figure 8, treatment circuit 32 has, and is connected with the signal terminal 50 signal wire, that a plurality of sensors are used that a plurality of sensors are used, and the signal wire that said a plurality of sensors are used links together magnetic sensor circuit 30 and treatment circuit 32.At this, the signal wire that sensor uses does, for example the signal wire of Figure 10, signal SA illustrated in fig. 11, SAN, SB, SBN etc.
In addition, shown in figure 12, the treatment circuit 32 of rectangle (IC of treatment circuit) has first to fourth limit S1～S4.At this, the 3rd limit S3 is and the opposed limit of the first limit S1 that the 4th limit S4 is and the opposed limit of the second limit S2.In addition, the second, the 4th limit S2, S4 and first, the 3rd limit S1, S3 quadrature (intersection).
At this moment, shown in figure 12, the signal terminal 50 that a plurality of sensors of treatment circuit 32 are used is set at, among the limit S1～S4 of treatment circuit with the magnetic sensor circuit 30 opposed first limit S1 on.That is, the signal terminal 50 used of a plurality of sensors is with along the mode of the first limit S1 and be arranged configuration.And, with the signal wire 54 that magnetic sensor circuit 30 and treatment circuit 32 sensors that link together, a plurality of are used, go up on the SF1 for first that is not configured in circuit substrate 10 mutually across.
Through adopting this kind mode, can utilize short path to connect the signal wire 54 (SA, SAN, SB, SBN etc.) that magnetic sensor circuit 30 and treatment circuit 32 sensors that link together, a plurality of are used.Therefore, can reduce the stray capacitance that parasitizes on these signal wires 54, dead resistance etc., and the deterioration of the characteristics of signals that can suppress to cause because of stray capacitance, dead resistance etc.In addition and since the signal wire 54 that sensor uses by distribution for not intersecting mutually, so also can the capacitive coupling of locating between these signal wires 54 etc. be controlled in Min., thereby can suppress the deterioration of characteristics of signals.In addition, the signal connection between magnetic sensor circuit 30 and the treatment circuit 32 becomes simple, thereby can realize the simple signal wiring of circuit substrate 10.
In addition, as shown in Figure 8, treatment circuit 32 has, and is connected with the signal terminal 52 signal wire, that a plurality of display parts are used that a plurality of display parts are used, and the signal wire that said a plurality of display parts are used links together treatment circuit 32 and display part 60.With display part 60 is that the situation of the LCD of segmentation is an example, and then the signal wire that uses of display part is the signal wire of section drive signal and common drive signal.
And the signal terminal that these display parts are used (section terminal, public terminal) is set at, at least one limit among the second limit S2 of treatment circuit 32, the 3rd limit S3 and the 4th limit S4.If with Figure 12 is example, then the signal terminal 52-1 that uses of display part is set on the second limit S2, and the signal terminal 52-2 that display part is used is set on the 3rd limit S3.That is, the signal terminal 52-1 that a plurality of display parts are used is with along the mode of the second limit S2 and be arranged configuration, and the signal terminal 52-2 that a plurality of display parts are used is with along the mode of the 3rd limit S3 and be arranged configuration.In addition, also can the signal terminal 52-3 that the display part of a part is used be arranged on the first limit S1.
Through this kind mode, can apply in a flexible way effectively limit S2, S3, S4 beyond the limit S1 that disposes the signal terminal 50 that sensor uses dispose the signal terminal 52 that display part is used, thereby can realize the simplification etc. of the signal wiring of circuit substrate 10.Especially, because the signal terminal used of display part 52 for example needs the corresponding amount of number with the segment electrode and the public electrode of display part 60, so its number of terminals increases.About this point, in Figure 12, dispose limit S2 beyond the limit S1 of the signal terminal 50 that sensor uses, S3 etc. through applying in a flexible way effectively, and disposed the signal terminal 52 that a plurality of display parts are used.Therefore, the signal terminal of using for the more display part of number of terminals 52 also can easily be configured, thereby can realize the simplification of terminal arrangement and signal wiring.Under the situation on first SF1 that for example treatment circuit 32 has been installed in circuit substrate 10 with mode shown in Figure 3; Can with the signal wire of using from the display part of handling circuit 32 (section drive signal line, common drive signal line) simply distribution in, be arranged in the hole portion 14,16 of the both sides on the circuit substrate 10.Therefore, from treatment circuit 32 via connector portion 70,72, also can be simplified to the connection of the signal wiring of display part 60, thereby can realize simplification and the miniaturization etc. of the structure of electronic unit.
In addition, Figure 13 for the flow measurement of observing this embodiment from the side the figure during with electronic unit.Shown in figure 13, in this embodiment, on circuit substrate 10, be provided with damp proof parts 36 with the mode that covers magnetic sensor circuit 30 and treatment circuit 32.Particularly, on first SF1 of circuit substrate 10, be formed with damp proof parts 36.That is, the damp proof parts 36 (damp course) than the thin skin film form with the mode that covers magnetic sensor circuit 30, treatment circuit 32 (and EEPROM34).These damp proof parts 36 can be through utilizing the for example material of moisture resistance such as silicon, the mode that first SF1 of circuit substrate 10 applied etc. and forming.
Through this kind mode, for example in Fig. 5, Fig. 6, can protect magnetic sensor circuit 30, treatment circuit 32, make the influence of its moisture of avoiding producing etc. by the liquid of the inner water of the shell of impeller 90 sides 104 etc.In addition, also be easy to make circuit substrate 10 to have, make the isolation features that is immersed in shell 102 inside from shell 104 inner liquid that can nots.In addition, though in Figure 13, formed damp proof parts 36, also can form damp proof parts second SF2 side in first SF1 side of circuit substrate 10.For example, the mode with battery in the coverage diagram 2 20 and battery carrier 22 forms damp proof parts.Through adopting this kind mode, can protect the influence that battery 20 grades make its moisture of avoiding being produced by liquid etc.
In addition, though as stated this embodiment is specified, can substantially not break away under the condition of fresh content and effect of the utility model and carry out multiple change, this is understandable to those skilled in the art.Therefore, this change example also all is comprised in the scope of the utility model.For example, in instructions or accompanying drawing, the word of at least once being put down in writing together with the different words of broad sense or synonym more, any position in instructions or accompanying drawing all can replace with this different word.In addition, flow measurement also is not limited to the illustrated content of this embodiment, and can carries out various distortion with electronic unit, the structure of flow measurement device, action.For example, the flow measurement of this embodiment also can be applied in the detection to the flow of the liquid beyond the water with electronic unit, flow measurement device.
Symbol description
First of SF1;
Second of SF2;
The DR1 first direction;
The DR2 second direction;
The P1 primary importance;
The P2 second place;
P3 the 3rd position;
R1～R8 magnetic resistive element;
R1～S4 first to fourth limit;
10 circuit substrates;
14,16 hole portions;
18 notchs;
20 batteries;
22 battery carriers;
30 magnetic sensor circuits;
32 treatment circuits;
34 EEPROM；
36 damp proof parts;
40 AFE；
42 CPU；
44 drive circuits;
45 I/F circuit;
46 RTC circuit;
48 storage parts;
50 sensors are used signal terminal;
52 (52-1～52-3) display part is used signal terminal;
54 signal wires;
60 display parts;
62 viewing areas;
70 first connector portion;
72 second connector portion;
74,76 signal wires;
77 hole portions;
78 juts;
90 impellers;
92 magnet;
94 turning axles;
100 caps;
102,104 shells.
Claims (12)
1. electronic unit is used in a flow measurement, it is characterized in that, comprising:
Circuit substrate, its conduct is provided with first face of opposed of impeller: the signal impression through magnetic comes the magnetic sensor circuit that the rotation of following the said impeller that flowing of liquid rotate is detected and implements the treatment circuit from the Signal Processing and the demonstration control and treatment of said magnetic sensor circuit;
Display part, it is set at second side at said first back side of said circuit substrate, and is implemented to show control through said treatment circuit, thus display image;
Connector portion, it links together said display part and said circuit substrate.
2. electronic unit is used in flow measurement as claimed in claim 1, it is characterized in that,
Comprise battery, said battery is used to supply with the power supply of said magnetic sensor circuit and said treatment circuit,
Said battery is set between said circuit substrate and the said display part.
3. electronic unit is used in flow measurement as claimed in claim 1, it is characterized in that,
Said treatment circuit has, and is connected with a plurality of sensors and uses signal terminal with a plurality of sensors of signal wire, and a plurality of said sensors link together said magnetic sensor circuit and said treatment circuit with signal wire,
A plurality of said sensors are set at signal terminal, in the limit of said treatment circuit with opposed first limit of said magnetic sensor circuit on.
4. electronic unit is used in flow measurement as claimed in claim 3, it is characterized in that,
Said treatment circuit has, and is connected with a plurality of display parts and uses signal terminal with a plurality of display parts of signal wire, and a plurality of said display parts link together said treatment circuit and said display part with signal wire,
Said display part is set at signal terminal, at least one limit in second limit of said treatment circuit, the 3rd limit and the 4th limit.
5. use electronic unit like each described flow measurement in the claim 1 to 4, it is characterized in that,
A plurality of sensors that said magnetic sensor circuit and said treatment circuit link together are used signal wire, mutually not across by distribution on said first of said circuit substrate.
6. use electronic unit like each described flow measurement in the claim 1 to 4, it is characterized in that,
Said magnetic sensor circuit is set at and is installed in the corresponding primary importance of the magnet place on the said impeller on said first of said circuit substrate.
7. electronic unit is used in flow measurement as claimed in claim 6, it is characterized in that,
Said treatment circuit is set at from said primary importance and has only separated the second place of giving set a distance on said first of said circuit substrate.
8. use electronic unit like each described flow measurement in the claim 1 to 4, it is characterized in that,
In the first direction side of said magnetic sensor circuit and said treatment circuit, be provided with first connector portion as said connector portion,
When the reverse direction with said first direction was set at second direction, the said second direction side at said magnetic sensor circuit and said treatment circuit was provided with second connector portion as said connector portion.
9. electronic unit is used in flow measurement as claimed in claim 8, it is characterized in that,
Said display part has only separated the position of giving set a distance through said first connector portion and said second connector portion thereby be supported in from said second face of said circuit substrate.
10. electronic unit is used in flow measurement as claimed in claim 8, it is characterized in that,
On said first connector portion and said second connector portion, distribution has a plurality of display parts that said treatment circuit and said display part are linked together to use signal wire.
11. use electronic unit like each described flow measurement in the claim 1 to 4, it is characterized in that,
On said circuit substrate, be provided with damp proof parts with the mode that covers said magnetic sensor circuit and said treatment circuit.
12. a flow measurement device is characterized in that, comprising:
Electronic unit is used in each described flow measurement in the claim 1 to 11;
Said impeller.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011006116U JP3172703U (en) | 2011-10-19 | 2011-10-19 | Electronic unit for flow measurement and flow measuring device |
| JP2011-006116 | 2011-10-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202522269U true CN202522269U (en) | 2012-11-07 |
Family
ID=47108299
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204400058U Expired - Fee Related CN202522269U (en) | 2011-10-19 | 2011-11-08 | Electronic unit for flow measurement and flow measuring device |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP3172703U (en) |
| CN (1) | CN202522269U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108645906A (en) * | 2018-05-04 | 2018-10-12 | 江苏吉华电子科技有限公司 | A kind of bias holding intelligent Electrochemical gas sensor |
-
2011
- 2011-10-19 JP JP2011006116U patent/JP3172703U/en not_active Expired - Fee Related
- 2011-11-08 CN CN2011204400058U patent/CN202522269U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108645906A (en) * | 2018-05-04 | 2018-10-12 | 江苏吉华电子科技有限公司 | A kind of bias holding intelligent Electrochemical gas sensor |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3172703U (en) | 2012-01-05 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121107 Termination date: 20181108 |