CN208818730U - A kind of integrated-type air velocity transducer - Google Patents
A kind of integrated-type air velocity transducer Download PDFInfo
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- CN208818730U CN208818730U CN201821445612.1U CN201821445612U CN208818730U CN 208818730 U CN208818730 U CN 208818730U CN 201821445612 U CN201821445612 U CN 201821445612U CN 208818730 U CN208818730 U CN 208818730U
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- velocity transducer
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Abstract
The utility model discloses a kind of integrated-type air velocity transducers, including air velocity transducer chip, sensor signal processing circuit and signal connector, sensor signal processing circuit is by sensor signal bridgt circuit unit, analog to digital signal conversion chip, microcontroller chip and digital-analog signal conversion chip are sequentially connected electrically, air velocity transducer chip is electrically connected with sensor signal bridgt circuit unit, each chip in sensor signal processing circuit is integrated on substrate with naked core sheet form, the signal pad of each chip is electrically connected with the signal pad on substrate by wire bonding mode in sensor signal processing, air velocity transducer chip is electrically connected with substrate signal pad by Denso mode, air velocity transducer chip is fixedly connected in a manner of glue sticking with substrate, signal connector is electrically connected with substrate by Denso mode , encapsulated layer is covered on sensor signal processing circuit, and signal connector is electrically connected with microcontroller chip, digital-analog signal conversion chip.
Description
Technical field
The present invention relates to a kind of air velocity transducer more particularly to a kind of integrated form air velocity transducers, are integrated with wind speed sensing
Device chip and sensor signal processing circuit module, belong to sensor technical field.
Background technique
Air velocity transducer is widely used in the neck such as Heating,Ventilating and Air Conditioning, intelligent building, ventilation equipment, clean room, pharmacy workshop
Domain plays a significant role the level of security and reduction energy consumption that improve environmental amenity degree, safeguard work environment.
Air velocity transducer can be divided into the types such as mechanical, dynamic pressure type, ultrasonic type and hot type.Mechanically with wind-cup type and wind wheel
Based on formula, since runner is moving element, the factors such as mechanical friction, silt, dust accretions keep the reliability of instrument not high, error
It is larger；Dynamic pressure type is based on Pitot tube, and when measuring tiny flow quantity, error is larger；Ultrasonic sensor volume is big, and price is high
Expensive, cost performance is low.Hot type air velocity transducer with its high sensitivity, crushing is low, the large and small flow of range is sensitive and fast response time
The features such as be used widely in wind speed measurement field.
But wind speed sensor chip and sensor signal processing circuit are discrete placements in current wind speed transducer,
It is as shown in Figure 1 traditional hot diaphragm type air velocity transducer (transmitter) schematic diagram, mainly by air velocity transducer chip A1, shell
A2-1, A2-2, sensor signal processing circuit A3, signal connector A4 composition.Air velocity transducer chip A1 is encapsulated in shell A2-
In 1, sensor signal processing circuit A3 is assemblied in shell A2-2, and signal connector A4 is hot diaphragm type air velocity transducer (pick-up
Device) power supply and signal output interface are provided.Sensor signal processing circuit on printed circuit board (i.e. substrate) and circuit board by moulding
The discrete component composition of material encapsulation, air velocity transducer chip and sensor signal processing circuit carry out letter by multicore shielding line
Number connection, haves the shortcomings that volume is big, integrated level is not high；Although high density row has been carried out in the component on printed circuit board
Cloth, but since by component case package volumetric constraint, signal processing circuit board volume is still larger, causes wind speed transducer
Overall volume is larger, is not suitable for the miniaturized application apparatus field to installation space harshness, such as vent cabinet, air purifier.
Summary of the invention
It is an object of the invention in view of the above problems and insufficient, a kind of integrated-type air velocity transducer is proposed.
To achieve the goals above, the concrete scheme that the present invention uses is: a kind of integrated-type air velocity transducer, including outer
Shell, air velocity transducer chip, sensor signal processing circuit and signal connector, the sensor signal processing circuit is by sensing
Device signal bridging circuit unit, analog to digital signal conversion chip, microcontroller chip and digital-analog signal conversion chip
It is sequentially connected electrically, the air velocity transducer chip is electrically connected with sensor signal bridgt circuit unit, the sensor letter
Number bridgt circuit unit, analog to digital signal conversion chip, microcontroller chip and the distribution of digital-analog signal conversion chip
It integrates on one substrate, analog to digital signal conversion chip, microcontroller chip sum number in the sensor signal processing
Word-analog signal conversion chip is integrated on substrate with naked core sheet form, the analog to digital in the sensor signal processing
Signal pad on the signal pad and substrate of signal conversion chip, microcontroller chip and digital-analog signal conversion chip
It is electrically connected by wire bonding mode, the signal pad of the front end of the signal lead and substrate of the air velocity transducer chip passes through
Denso mode is electrically connected, and the air velocity transducer chip is fixedly connected in a manner of glue sticking with the front end of substrate, the signal
Connector is electrically connected with the signal pad of the rear end of substrate by Denso mode, is covered on the sensor signal processing circuit
Encapsulated layer, the signal connector are electrically connected with microcontroller chip, digital-analog signal conversion chip, the wind speed sensing
Device chip, sensor signal processing circuit and signal connector are respectively mounted in the shell.
Further, the encapsulated layer is made of epoxy resin material.
Further, the shell is cylindrical.
Further, the air velocity transducer chip is FS5 type hot diaphragm type air velocity transducer, the analog to digital signal
The model AD7892 of conversion chip, the model PIC12F675 of the microcontroller chip, the digital-analog signal turn
Change the model DAC7611 of chip, the model GX12-8 of the signal connector.
In integrated-type air velocity transducer of the invention, air velocity transducer chip FS5 and sensor signal bridgt circuit unit
Constant temperature difference circuit is collectively constituted, the physical quantity that wind speed changes is converted into voltage signal, analog to digital signal conversion chip
The analog voltage signal that sensor signal bridgt circuit unit exports is converted to digital signal by AD7892, and is exported to microcontroller
Device chip PIC12F675, microcontroller chip are returned the algorithm process that collected voltage signal carries out piece-wise linearization
One air speed data changed, passes through I2C RS232 serial signal exports digital wind velocity signal, digital wind velocity signal
It is exported by signal connector；Normalized air speed data is exported to digital-analog signal and converts core by microcontroller chip simultaneously
Piece DAC7611, digital-analog signal conversion chip DAC7611 convert digital signals into the analog voltage signal of linear convergent rate,
Analog voltage signal is exported by signal connector.
Air velocity transducer of the invention realizes air velocity transducer chip and is electrically connected with sensor signal processing circuit and same
When be fixedly connected with substrate, sensor signal processing circuit uses bare chip, this structure high degree improves hardware circuit
Integrated level reduces the volume of circuit, can be realized high-volume, automated production, being capable of high degree reduction wind speed transducer
Volume, reduce cost.
Detailed description of the invention
Fig. 1 is traditional hot diaphragm type wind speed transducer；
Fig. 2 is the integrated-type air velocity transducer structural schematic diagram of embodiment；
Fig. 3 is the integrated-type air velocity transducer structure schematic elevation view of embodiment；
Fig. 4 is the integrated-type air velocity transducer structure schematic side view of embodiment.
Specific embodiment
To keep the content of the invention clearer, with reference to the accompanying drawing, to the specific embodiment of the invention
It is described in further detail.It should be noted that for purposes of clarity, being omitted in attached drawing and explanation unrelated with the invention
, the expression and description of component known to persons of ordinary skill in the art.
Embodiment 1, with reference to Fig. 2, a kind of integrated-type air velocity transducer, including shell 1, air velocity transducer chip 2, sensor
Signal processing circuit 3 and signal connector 4, the sensor signal processing circuit 3 is by sensor signal bridgt circuit unit
301, analog to digital signal conversion chip 302, microcontroller chip 303 and digital-analog signal conversion chip 304 are successively electric
It is formed by connecting, the air velocity transducer chip 2 is electrically connected with sensor signal bridgt circuit unit 301, air velocity transducer chip
2, sensor signal processing circuit 3 and signal connector 4 can be used existing module and be attached, and creation point of the invention exists
In the sensor signal bridgt circuit unit 301, analog to digital signal conversion chip 302,303 sum number of microcontroller chip
Word-distribution of analog signal conversion chip 304 is integrated on one substrate, the analog to digital letter in the sensor signal processing 3
Number conversion chip 302, microcontroller chip 303 and digital-analog signal conversion chip 304 are integrated in base with naked core sheet form
On plate, so-called bare chip refers to the chip not encapsulated, the analog to digital signal conversion chip in the sensor signal processing
302, the signal pad on the signal pad and substrate of microcontroller chip 303 and digital-analog signal conversion chip 304 passes through
Wire bonding mode is electrically connected, and line layer is printed on substrate, each circuit and chip electrical connection is realized, since each chip is adopted
Therefore, reduce each chip since redundancy pin, shell encapsulation cause without package casing and packaging pin with bare chip
Volume waste, improve the chip integration of unit area, reduce the volume of circuit；The letter of the air velocity transducer chip 2
Number lead is electrically connected with the signal pad of the front end of substrate by Denso mode, and the air velocity transducer chip 2 is with glue sticking
The front end of mode and substrate is fixedly connected, and prevents air velocity transducer chip from loosening, it is preferred that using the side of epoxy resin glue sticking
Formula；The signal connector 4 is electrically connected with the signal pad of the rear end of substrate by Denso mode；
Encapsulated layer 305 is covered on the sensor signal processing circuit 3, the encapsulated layer 305 uses epoxy resin material
Matter is made.Each chip and its signal lead are encapsulated using epoxy resin on the i.e. described substrate, for increasing each chip, signal
The mechanical protection intensity and resistance to environment capacity of lead.
The signal connector 4 is electrically connected with microcontroller chip 303, digital-analog signal conversion chip 304, described
Air velocity transducer chip 2, sensor signal processing circuit 3 and signal connector 4 are installed in shell 1, and the shell 1 is in circle
Cylindricality, interior of shell are hollow.
In the present embodiment, the air velocity transducer chip 2 is FS5 type hot diaphragm type air velocity transducer, the sensor substrate
For ceramic substrate, the metal film on substrate is prepared using thick-film technique.Signal connector 4, substrate and air velocity transducer core
Piece 2 is linearly arranged, and is easily installed in cylindrical shell 1, by epoxy resin by signal connector 4, substrate and wind speed
Sensor chip 2 is fixed in cylindrical shell 1.
The model AD7892 of the analog to digital signal conversion chip 302, the model of the microcontroller chip 303
For PIC12F675, the model DAC7611 of the digital-analog signal conversion chip 304, the model of the signal connector 4
For GX12-8.The substrate constitutes (wiring layer >=2) using multi-layer metal wiring, and baseplate material is ceramics, epoxy resin base plate
In one of which, signaling interface of the metal line for each functional chip in connecting substrate on substrate form signal transmission.
In integrated-type air velocity transducer of the invention, air velocity transducer chip FS5 and sensor signal bridgt circuit unit
Constant temperature difference circuit is collectively constituted, the physical quantity that wind speed changes is converted into voltage signal, analog to digital signal conversion chip
The analog voltage signal that sensor signal bridgt circuit unit exports is converted to digital signal by AD7892, and is exported to microcontroller
Device chip PIC12F675, microcontroller chip are returned the algorithm process that collected voltage signal carries out piece-wise linearization
One air speed data changed, passes through I2C RS232 serial signal exports digital wind velocity signal, digital wind velocity signal
It is exported by signal connector, which has addressing function, realizes the wired networking of air velocity transducer with can be convenient；It is micro- simultaneously
Controller chip exports normalized air speed data to digital-analog signal conversion chip DAC7611, digital-analog signal
Conversion chip DAC7611 converts digital signals into the analog voltage signal of linear convergent rate, and analog voltage signal is connected by signal
Device output, GX12-8 type signal connector have multiple stitch, it can it is defeated to carry out digital signal for connection microcontroller chip
Out, it and can connect digital-analog signal conversion chip DAC7611, carry out analog signal output, GX12-8 type signal connector
Stitch give air velocity transducer power supply by connecting extraneous power supply.
The integrated form air velocity transducer of the present embodiment is prepared by following steps:
The back side of air velocity transducer chip 2 and substrate front end is bonded using epoxide-resin glue, and carried out by step 1
Solidification, before step 1, substrate printed wire layer, so that each chip and device are installed；
Step 2, by sensor signal bridgt circuit unit 301, analog to digital signal conversion chip 302, microcontroller core
Piece 303, digital-analog signal conversion chip 304 are assemblied on substrate by welding procedure；Step 3, using electrical fitting technology by wind
The signal lead of fast sensor chip 2 is electrically connected with the signal pad of the front end of substrate by Denso mode, and passes through substrate
Line layer realizes that air velocity transducer chip 2 and sensor signal processing circuit 3 are electrically connected, and is connected signal using electrical fitting technology
Device 4 is welded on the signal pad of the rear end of substrate and is realized at signal connector 4 and sensor signal by the line layer of substrate
Circuit 3 is managed to be electrically connected；
Step 4, the sensor signal bridgt circuit unit 301 in sensor signal processing, analog to digital signal convert core
Signal pad on the signal pad and substrate of piece 302, microcontroller chip 303 and digital-analog signal conversion chip 304 is logical
Wire bonding mode is crossed to be electrically connected；
Sensor signal processing circuit 3 is encapsulated using epoxide-resin glue, and is solidified by step 5；Encapsulating mode
There are two types of, one is convert sensor signal bridgt circuit unit, the analog to digital signal in sensor signal processing circuit
Chip, microcontroller chip, digital-analog signal conversion chip are individually encapsulated；Second is by sensor signal bridgt circuit
Unit, analog to digital signal conversion chip, microcontroller chip, digital-analog signal conversion chip carry out whole encapsulating；
Current semi-finished product are fitted into shell 1 by step 6, and are fixed using epoxy resin.
On only express the embodiment of the invention, the description thereof is more specific and detailed, but can not therefore manage
Solution is the limitation to patented invention-creation range.It should be pointed out that for those of ordinary skill in the art, not taking off
Under the premise of from the invention design, various modifications and improvements can be made, these belong to the protection of the invention
Range.Therefore, the scope of protection shall be subject to the appended claims for the invention patent.
Claims (4)
1. a kind of integrated-type air velocity transducer, including shell, air velocity transducer chip, sensor signal processing circuit and signal connect
Connect device, the sensor signal processing circuit is by sensor signal bridgt circuit unit, analog to digital signal conversion chip, micro-
Controller chip and digital-analog signal conversion chip are sequentially connected electrically, and the air velocity transducer chip and sensor are believed
Number bridgt circuit unit electrical connection, which is characterized in that the sensor signal bridgt circuit unit, the conversion of analog to digital signal
Chip, microcontroller chip and the distribution of digital-analog signal conversion chip are integrated on one substrate, at the sensor signal
Analog to digital signal conversion chip, microcontroller chip and digital-analog signal conversion chip in reason is with naked core sheet form
It is integrated on substrate, analog to digital signal conversion chip, microcontroller chip and the number-in the sensor signal processing
The signal pad of analog signal conversion chip is electrically connected with the signal pad on substrate by wire bonding mode, and the wind speed passes
The signal pad of the front end of the signal lead and substrate of sensor chip is electrically connected by Denso mode, the air velocity transducer chip
It is fixedly connected in a manner of glue sticking with the front end of substrate, the signal pad of the rear end of the signal connector and substrate passes through electricity
Dress mode is electrically connected, and encapsulated layer, the signal connector and microcontroller core are covered on the sensor signal processing circuit
Piece, the electrical connection of digital-analog signal conversion chip, the air velocity transducer chip, sensor signal processing circuit and signal connect
Device is connect to be respectively mounted in the shell.
2. a kind of integrated-type air velocity transducer as described in claim 1, which is characterized in that the encapsulated layer uses epoxy resin
Material is made.
3. a kind of integrated-type air velocity transducer as described in claim 1, which is characterized in that the shell is cylindrical.
4. a kind of integrated-type air velocity transducer as described in claim 1, which is characterized in that the air velocity transducer chip is
FS5 type hot diaphragm type air velocity transducer, the model AD7892 of the analog to digital signal conversion chip, the microcontroller core
The model PIC12F675 of piece, the model DAC7611 of the digital-analog signal conversion chip, the signal connector
Model GX12-8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821445612.1U CN208818730U (en) | 2018-09-04 | 2018-09-04 | A kind of integrated-type air velocity transducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821445612.1U CN208818730U (en) | 2018-09-04 | 2018-09-04 | A kind of integrated-type air velocity transducer |
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| Publication Number | Publication Date |
|---|---|
| CN208818730U true CN208818730U (en) | 2019-05-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201821445612.1U Active CN208818730U (en) | 2018-09-04 | 2018-09-04 | A kind of integrated-type air velocity transducer |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109164271A (en) * | 2018-09-04 | 2019-01-08 | 南京英格玛仪器技术有限公司 | A kind of integrated-type air velocity transducer and manufacturing method |
-
2018
- 2018-09-04 CN CN201821445612.1U patent/CN208818730U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109164271A (en) * | 2018-09-04 | 2019-01-08 | 南京英格玛仪器技术有限公司 | A kind of integrated-type air velocity transducer and manufacturing method |
| CN109164271B (en) * | 2018-09-04 | 2024-02-13 | 南京英格玛仪器技术有限公司 | Integrated wind speed sensor and manufacturing method |
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