CN208736893U - A kind of micro- air velocity transducer - Google Patents
A kind of micro- air velocity transducer Download PDFInfo
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- CN208736893U CN208736893U CN201821627679.7U CN201821627679U CN208736893U CN 208736893 U CN208736893 U CN 208736893U CN 201821627679 U CN201821627679 U CN 201821627679U CN 208736893 U CN208736893 U CN 208736893U
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- air velocity
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Abstract
The utility model relates to measuring wind speed technical field more particularly to a kind of micro- air velocity transducers comprising probe, the probe socket set on probe bottom；Probe includes wind speed chip assembly, shell, top cover, and enclosure interior is hollow and side is equipped with ventilation opening, and wind speed chip assembly is installed in shell and its lower end is pierced by housing bottom；Top cover is connected to case top；Wind speed chip assembly includes insulation support plate, insulating substrate, hotting mask sensitive body, adding thermal resistance, connection terminal, insulating substrate is vertical on insulation support plate, hotting mask sensitive body and adding thermal resistance, which are bonded, is set to insulated substrate surface, hotting mask sensitive body two sides are equipped with first lead, adding thermal resistance two sides are equipped with the second lead, connection terminal is arranged in insulation support plate, and connection terminal, which includes upper end, is connected to second connection end that the first connection terminal of hotting mask sensitive body, upper end are connected to by the second lead adding thermal resistance by first lead.The utility model is used for micro- measuring wind speed, small in size, and measurement accuracy is high.
Description
Technical field
The utility model relates to measuring wind speed technical field more particularly to a kind of micro- air velocity transducers.
Background technique
Air velocity transducer is can continuously to monitor wind speed size, and can measure to the real-time wind speed of present position
Important instrument；Sensors with auxiliary electrode is widely used in mine, electric power, tobacco, and medicine etc. needs the field of real-time monitoring wind speed.
What the type of air velocity transducer and performance directly affected systematic air flow detects and controls quality.Air velocity transducer kind
Various, the most commonly used is pitot tube type air velocity transducer, ultrasonic wave vortex air velocity transducer, propeller air velocity transducer and heat
Wire type air velocity transducer etc.；General pitot tube type air velocity transducer 4~16m/s range have good precision, but
There is limitation in terms of small measuring wind speed, be unable to measure lower than 2m/s, therefore can not make in the measurement occasion of some small wind speed
With；In addition, the bulk factor of traditional sensor itself is not suitable for the measurement to small space wind speed yet；
In consideration of it, to overcome drawbacks described above, providing a kind of micro- air velocity transducer becomes this field urgent problem to be solved.
Summary of the invention
The purpose of this utility model is to provide for a kind of micro- air velocity transducer, is applied to micro- measuring wind speed, small in size, surveys
Accuracy of measurement is high.
In order to solve the above technical problems, the technical solution of the utility model are as follows: a kind of micro- air velocity transducer comprising visit
Head, the probe socket set on probe bottom for fixed probe；The probe includes wind speed chip assembly, shell, top cover, the shell
Body inner hollow and side are equipped with ventilation opening, and the wind speed chip assembly is installed in shell and its lower end is pierced by housing bottom；
The top cover is connected to case top；The wind speed chip assembly includes insulation support plate, insulating substrate, hotting mask sensitive body, adds
Thermal resistance, connection terminal, the insulating substrate are vertical on insulation support plate, and the hotting mask sensitive body and adding thermal resistance are pasted
It closes to be set to and keeps spacing between insulated substrate surface and the hotting mask sensitive body and adding thermal resistance, hotting mask sensitive body two sides are set
There is first lead, the adding thermal resistance two sides are equipped with the second lead, and the connection terminal is arranged in insulation support plate, the connection
Terminal, which includes upper end, to be connected to the first connection terminal of hotting mask sensitive body, upper end by first lead and is connected to by the second lead
Second connection end of adding thermal resistance.
By above scheme, hotting mask sensitive body and adding thermal resistance are film platinum resistor；Using film platinum resistor temperature coefficient
Height still keeps high-precision in low wind speeds.
Preferably, the insulating substrate is made of glass, its mechanical strength and insulation characterisitic variation are small under high temperature environment,
It is not easy to influence the measurement of hotting mask sensitive body, stability is good.
Probe mounting groove is equipped with by above scheme, above the probe socket, the lower part of the housing outer wall and the probe are pacified
Tankage inner wall is fitted and connected；The chip assembly mounting groove for installing wind speed chip assembly, institute are equipped on the inside of the housing bottom
It states insulation support plate side wall to be fitted and connected with chip assembly mounting groove inner wall, the connection terminal lower end is installed across chip assembly
Slot and the slot bottom for being pierced by probe mounting groove；The top cover lateral wall is fitted and connected with upper part of the housing inner wall；The side of being fitted and connected
Formula is encapsulating glue connection, easy for installation, and connection is simple；Further, connection terminal is pierced by the combination at chip assembly mounting groove bottom
Casting glue closure can be used in place.
Preferably, the glue kind of the casting glue is Lantian 9310, and surface drying is good, is suitble to plastics and plastic/glass/metal
Bonding；Preferably, using ultraviolet curing can be used at casting glue link position, prevent glue from leaking.
By above scheme, the top cover lower surface is equipped with the limiting slot for housing insulation substrate top；Insulating substrate top
End, which is arranged in limiting slot, has further fixed wind speed chip assembly, improves its stability.
By above scheme, the sensor further includes jack assemblies, and the jack assemblies are set to probe socket bottom and upper end
It is connected to connection terminal and is connected to external control system for that will pop one's head in；The jack assemblies include connecting plate, are arranged in connection
Plate and upper and lower ends are pierced by the shank of connecting plate, and the connecting plate is equipped with the through-hole for the insertion of connection terminal lower end,
Both the shank and connection terminal are close to corresponding welding at connecting plate upper surface location；The shank is four,
The second shank including the first shank welded with the first connection terminal and with the welding of second connection end；Connection terminal exists
It can be directly connected to when probe and external control system short distance, if pop one's head in external control system distance farther out, connection terminal
Length is inadequate, and jack assemblies are remotely connected with external control system for realizing popping one's head in, and the shank is used as will be entire
Sensor accesses the interface of external device (ED), and the support when connecting plate is used as connection terminal and shank welding is used to place weldering
Connect the scolding tin used.
By above scheme, the jack assemblies further include the reinforced seat for being connected to connecting plate bottom, and the reinforced seat includes
Pedestal set on connecting plate lower surface and the plate body that is connected to pedestal side and extends downwardly, shank are arranged in the pedestal；
Reinforced seat can reinforce the stability that sensor is connect with external device (ED).
By above scheme, jack assemblies mounting groove, the slot bottom of the jack assemblies mounting groove are equipped with below the probe socket
The through-hole for being used for connection terminal low side and being inserted into the connecting plate is connected to in the middle part of the slot bottom of the probe mounting groove；The socket group
Part mounting groove is fitted and connected with connecting plate side wall；The mode that is fitted and connected is encapsulating glue connection, stable connection；Preferably, institute
The glue kind for stating casting glue is Lantian 9310, and surface drying is good, is suitble to plastics bonding with plastic/glass/metal；Preferably, it adopts
With ultraviolet curing can be used at casting glue link position, prevent glue from leaking.
By above scheme, the probe socket two sides are equipped with installation through-hole；Installation through-hole can be with the connector cooperation separately set
The position of measuring wind speed is carried out needed for sensor is installed on.
Compared with prior art, it using micro- air velocity transducer of above-mentioned technical proposal, has the following beneficial effects:
One, the utility model uses Miniaturization Design, and chip assembly mounting groove provides for the insertion of wind speed chip assembly
Interior alignment position, for fixing wind speed chip assembly, probe socket and probe carry out assembling and be bondeds and can install probe to needing to survey
The position of wind speed is measured, probe bottom connection terminal carries out micro- measuring wind speed as interface access external control system, small in size, knot
Structure is simple, installs easy to connect；Suitable for clean bench, Biohazard Safety Equipment, laminar flow hood, weighing room, movable purifying unit,
The measurement of the equipment such as pharmacy corporation separator system gentle breeze speed, the shell and top cover of probe have certain anti-pollution to dust and dirt
Dye ability；
Two, the hotting mask sensitive body of the utility model is the film platinum resistor for depending on insulated substrate surface, avoids hot line
The problem of resistance frangibility, without considering that its mechanical strength, long-time stability are good；The hotting mask sensitive body of the utility model is not easy oxygen
Change, pyroelecthc properties are stable and temperature coefficient is big, still keep high-precision in low wind speeds, this and utilize general temperature sensor technology
Or traditional airspeedometer of NTC bead thermistor technology is compared, and has more obvious technical advantage；And different wind speed sensing
There is preferable consistency between device.
Detailed description of the invention
Fig. 1 is the first embodiment overall structure diagram of the utility model；
Fig. 2 is the first embodiment overlooking structure diagram of the utility model；
Fig. 3 is cross-sectional view of the Fig. 2 along line A-A；
Fig. 4 is the structural schematic diagram popped one's head in the first embodiment；
Fig. 5 is the cross-sectional view popped one's head in Fig. 3；
Fig. 6 is the structural schematic diagram of wind speed chip assembly in the first embodiment；
Fig. 7 is the cross-sectional view of wind speed chip assembly in Fig. 5；
Fig. 8 is the cross-sectional view of shell in Fig. 5；
Fig. 9 is the cross-sectional view of top cover in Fig. 5；
Figure 10 is the cross-sectional view of probe socket in Fig. 4；
Figure 11 is second of embodiment overall structure diagram of the utility model；
Figure 12 is second of embodiment lateral body structural schematic diagram of the utility model；
Figure 13 is second of embodiment half section structure diagram of the utility model；
Figure 14 is the structural schematic diagram of jack assemblies in second of embodiment；
Figure 15 is the cross-sectional view of jack assemblies in Figure 12；
Figure 16 is that sensor is connected to the circuit connection diagram in external control system in the utility model embodiment；
Figure 17 is the structural schematic diagram that fixture is welded and fixed in the utility model embodiment.
Appended drawing reference: 1, it pops one's head in；11, wind speed chip assembly；111, insulation support plate；112, insulating substrate；113, hotting mask
Sensitive body；114, connection terminal；114a, the first connection terminal；114b, second connection end；115, lead；115a, first are drawn
Line；115b, the second lead；116, adding thermal resistance；12, shell；121, ventilation opening；122, chip assembly mounting groove；13, top cover；
131, limiting slot；2, probe socket；21, probe mounting groove；22, jack assemblies mounting groove；23, installation through-hole；3, jack assemblies；
31, connecting plate；32, shank；32a, the first shank；32b, the second shank；33, reinforced seat；331, pedestal；332, plate
Body.
Specific embodiment
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, with reference to the accompanying drawing and specifically
Embodiment is described in further detail the utility model.It should be appreciated that specific embodiment described herein is only used to solve
The utility model is released, is not used to limit the utility model.
Hereinafter, many aspects of the utility model will be more fully understood with reference to attached drawing.Component in attached drawing may not
It is drawn to scale.Alternatively, it is preferred that emphasis is clearly demonstrate the component of the utility model.In addition, several views in the accompanying drawings
In figure, identical appended drawing reference indicates corresponding part.
Word " exemplary " as used herein or " illustrative " expression are used as example, example or explanation.It retouches herein
Stating any embodiment for " exemplary " or " illustrative " to be not necessarily to be construed as is preferred relative to other embodiment or has
Benefit.All embodiments described below are illustrative embodiments, and providing these illustrative embodiments is to make
Those skilled in the art are obtained to make and use embodiment of the disclosure and be expected to be not intended to limit the scope of the present disclosure, the disclosure
Range is defined by the claims.In other embodiments, well known feature and method is described in detail so as not to obscure this
Utility model.For purpose described herein, term " on ", "lower", "left", "right", "front", "rear", "vertical", "horizontal" and
Its derivative words is related by the utility model oriented with such as Fig. 1.Moreover, have no intent to by above technical field, background technique,
Any theoretical limitation expressed or implied provided in summary of the invention or detailed description below.It should also be clear that being shown in the accompanying drawings
It is that the utility model limited in the following claims is conceived with specific device described in following discussion book and process
Simple examples embodiment.Therefore, specific size relevant to presently disclosed embodiment and other physical features should not be by
It is construed as limiting, unless claims are separately clearly stated.
Embodiment 1:
Fig. 1 to Figure 10 is please referred to, the utility model embodiment is a kind of micro- air velocity transducer comprising probe 1 is set to and visits
Probe socket 2 of first 1 bottom for fixed probe 1.
In conjunction with Fig. 1, Fig. 2, Fig. 3 and Figure 10, probe mounting groove 21 is equipped with above probe socket 2；2 two sides of probe socket are equipped with installation
Through-hole 23, for sensor to be connected to any position for needing to carry out measuring wind speed.
In conjunction with Fig. 3 to Figure 10, probe 1 includes wind speed chip assembly 11, shell 12, top cover 13,12 inner hollow of shell and
Side is equipped with ventilation opening 121, and 12 lower part of shell is set in probe mounting groove 21, and 12 lower part outer wall of shell and probe mounting groove 21
Inner wall is fitted and connected by 9310 casting glue of Lantian, and 12 bottom inside of shell is equipped with the chip for installing wind speed chip assembly 11
Component mounting groove 122, wind speed chip assembly 11 are installed in shell 12 in chip assembly mounting groove 122 and its lower end and are pierced by shell
12 bottoms, top cover 13 are connected at the top of shell 12, in the utility model embodiment, 13 lateral wall of top cover and 12 upper inner of shell
It is fitted and connected by 9310 casting glue of Lantian, 13 lower surface of top cover is equipped with the limiting slot for accommodating 11 top of wind speed chip assembly
131。
Wind speed chip assembly 11 includes insulation support plate 111, insulating substrate 112, hotting mask sensitive body 113, adding thermal resistance
116, connection terminal 114, insulation support plate 111 is horizontally disposed, and side wall and 122 inner wall of chip assembly mounting groove pass through Lantian
9310 casting glues are fitted and connected；Insulating substrate 112 is vertical on insulation support plate 111, exhausted in the utility model embodiment
Edge substrate 112 with a thickness of 0.6mm, 112 top of insulating substrate is arranged in the limiting slot 131 of 13 bottom end of top cover；Hotting mask is sensitive
Body 113 and adding thermal resistance 116 be bonded set on 112 surface of insulating substrate and the hotting mask sensitive body 113 and adding thermal resistance 116 it
Between keep spacing, in the utility model embodiment, the fitting of hotting mask sensitive body 113 is set to 112 surface lower portions of insulating substrate, heating electricity
116 fitting of resistance is set to 112 surface top of insulating substrate, and hotting mask sensitive body 113 and 116 two sides of adding thermal resistance are equipped with lead 115；
Connection terminal 114 is arranged in insulation support plate 111, and the hotting mask sensitive body 113 and adding thermal resistance 116 in the present embodiment are film
Platinum resistance, hotting mask sensitive body 113 are used as ambient temperature measurement element, and resistance value is 1000 Ω；Adding thermal resistance 116 is as heating pair
As；The material of insulating substrate 112 is glass, and lead 115 can be made of metallic nickel, and inoxidizability and corrosion resistance are strong；Hotting mask is quick
Feel 113 two sides of body and be equipped with first lead 115a, 116 two sides of adding thermal resistance are equipped with the second lead 115b, and connection terminal 114 includes upper
End is connected to the first connection terminal 114a of hotting mask sensitive body 113 by first lead 115a, upper end passes through the second lead 115b
It is connected to the sub- 114b of second connection end of adding thermal resistance 116；114 lower end of connection terminal connects as what is connect with external control system
Head；Connection terminal 114 is in the present embodiment the minute hand being welded to connect with lead 115, and minute hand is 4, refering to Fig. 6, inside two
A minute hand is the first connection terminal 114a, and top is connected to hotting mask sensitive body 113 by first lead 115a, and outside is two long
Needle is the sub- 114b of second connection end, and top is connected to adding thermal resistance 116 by the second lead 115b；Spacing between minute hand is
1.27mm can guarantee welding quality using fixture is welded and fixed, with reference to Figure 17, concrete operations are that will be connected in welding
The insulation support plate 111 of insulating substrate 112, which is placed on, to be welded and fixed on fixture so that insulating substrate 112 and connection terminal 114 it
Between obtain more accurate positioning, and reserve reasonable soldering gap, welding quality enable to guarantee.
The assembling flow path of the utility model embodiment are as follows:
Wind speed chip assembly 11 is set in the chip assembly mounting groove 122 in shell 12, position by assembling probe 1 first
The limiting slot 131 of 13 lower part of top cover is directed at 112 top of insulating substrate after correct, top cover 13 and shell 12 are assembled；After installing
It is blocked in connection terminal 114 and 12 bottom junction dispensing of shell, and prevents glue from leaking downwards using ultraviolet curing；Then
In 122 inside of chip assembly mounting groove and 111 joint dispensing of insulation support plate, finally in 12 joint point of top cover 13 and shell
Glue and with ultraviolet light curing, probe 1 is completed；
Then by 1 12 lower part outer wall gluing of shell insertion probe mounting groove 21 of popping one's head in, 114 lower end of connection terminal, 4 line is worn
Out, sensor assembling finishes, last soldering connection terminal 114 to external control system corresponding position, detection sensor.
The measuring principle of the utility model embodiment are as follows: this sensor measures wind speed using thermally equilibrated mode,
One of resistance is that adding thermal resistance 116 is used as heating target, hotting mask sensitive body of another resistance as ambient temperature measurement
113, using the resistance of heating in measurement, how much measurements with the relational implementation wind speed of the size of wind speed of heat be lost；It protects
The temperature-resistant of hotting mask sensitive body 113 is held, is made when generating heat losses in measurement process when the temperature drops, can be by circuit
Feedback system change electric current size, to maintain Current Temperatures constant；The flow velocity of curent change, that is, wind speed collected in this way
Variation.
When the utility model sensor measurement wind speed, the main element of external control circuit has Wheatstone bridge and feedback to mend
Repay network, schematic diagram is as shown in figure 16, probe 1 connect by connecting element pop one's head in circuit electric bridge 1 hotting mask sensitive body 113
Resistance is denoted as RP, other three arms resistance are denoted as R respectively1、R2And Rb, wherein R1For adding thermal resistance 116, R1Equal to R2, RbIt is adjustable
Decimal system precision resistance, RbIt can make the accuracy of the equilibrium principle measuring resistance using electric bridge for adjustable decimal system precision resistance
It is improved, while requiring the temperature coefficient of hotting mask sensitive body 113 very high, and opposite, it is desirable that R1、R2And RbTemperature coefficient
Very little.
Voltage E is added at the both ends electric bridge AC, when bridge balance, without potential difference between BD, is exported at this time without signal.When adding
When thermal resistance 116 does not heat, the resistance value R of adding thermal resistance 116fIt is called cold resistance, the cold resistance that each probe 1 has its different
Value.When test, the probe 1 of a unknown cold resistance value is accessed in electric bridge, R is adjustedbMake bridge balance, at this moment, decade
Resistor RbOn numerical value be exactly cold resistance numerical value, as Rf.Work overheat by setting hotting mask keeps permanent than temperature
Fixed point adjusts RbIts numerical value is set to be higher than Rf, generally it is recommended as 1.5 times of Rf。
By keeping hotting mask resistance, that is, hotting mask sensitive body 113 temperature-resistant in flow field, when wind speed V variation, cause
Flow through hotting mask resistance RPElectric current IVIt changes, changes so as to cause the voltage at both ends.Its process fed back are as follows: work as wind
When fast V increases, heat is taken away since air-flow flows through probe 1, the ohmically heat of hotting mask is reduced, the temperature drop of hotting mask resistance
It is low, cause its resistance to reduce, thus EBDIncrease, output voltage is caused to increase, the electric current for passing through hotting mask resistance increases, hotting mask
The heat that resistance generates increases, and hotting mask resistance temperature increases, and resistance value becomes larger.In its dynamic process, the temperature of hotting mask resistance is kept
It spends constant；Process of feedback may be expressed as:
After external control system collects the signal intensity of voltage E, be corrected, calculate after obtain real-time air speed value.
Embodiment 2:
In conjunction with Figure 11 to Figure 15, the utility model embodiment is a kind of micro- air velocity transducer comprising probe 1 is set to and visits
First 1 bottom for the probe socket 2 of fixed probe 1, set on 2 bottom of probe socket and upper end is connected to connection terminal 114 for that will visit
First 1 is connected to the jack assemblies 3 of external control system；Wherein, the knot of the probe 1 in the present embodiment and the probe 1 in embodiment 1
Structure is identical, the difference from embodiment 1 is that jack assemblies 3 are increased, for connecting at a distance as probe with external control system
Connector when connecing；The jack assemblies mounting groove 22 for installing jack assemblies is equipped with below probe socket 2.
Probe mounting groove 21 be connected to about 22 jack assemblies mounting groove, for pop one's head in 1 and jack assemblies 3 connection provide it is logical
Road；Wind speed chip assembly 11 is installed in shell 12 in chip assembly mounting groove 122 and its lower end and is pierced by the connection of 12 bottom of shell
In jack assemblies 3；Jack assemblies 3 include connecting plate 31, are arranged in connecting plate 31 and upper and lower ends are pierced by inserting for connecting plate 31
Extension bar 32, the reinforced seat 33 for being connected to 31 bottom of connecting plate, connecting plate 31 are equipped with for the logical of 114 lower end of connection terminal insertion
It is connected in the middle part of hole, the slot bottom of jack assemblies mounting groove 22 and the slot bottom of the probe mounting groove 21, the insertion of 114 bottom end of connection terminal
The through-hole of the connecting plate 31；Both shank 32 and connection terminal 114 weld at 31 upper surface location of connecting plate, this reality
It applies in example, refering to fig. 14, shank 32 is four, and inside two is the first shank welded with the first connection terminal 114a
32a, second shank 32b of two, the outside for the sub- 114b welding of second connection end；
Reinforced seat 33 includes being set to the pedestal 331 of 31 lower surface of connecting plate and being connected to 331 side of pedestal and extend downwardly
Plate body 332, shank 32 is arranged in pedestal 331, and 331 top of pedestal and 31 bottom of connecting plate can pass through 9310 casting glue of Lantian
It is fitted and connected；31 side wall of connecting plate is fitted and connected with jack assemblies mounting groove 22 by 9310 casting glue of Lantian.
The measuring principle of the present embodiment is identical as the measuring principle of embodiment 1, and assembling flow path is due to increasing jack assemblies 3
The step of assembling between jack assemblies 3 and probe 1 and probe socket 2: the assembling of reference implementation example 1 probe 1 and probe socket 2 is generated,
After assembling probe 1 and probe socket 2, by 31 side gluing of the connecting plate merging jack assemblies mounting groove 22 of jack assemblies 3 and visit
Headstock 2 carries out assembling fitting, and 32 upper end of shank of jack assemblies 3 and 114 lower end of connection terminal of probe 1 are welded, shank
32 lower end, 4 line is pierced by, and the sensor assembling of the present embodiment finishes, last soldering shank 32 to external control system corresponding position
Place, detection sensor.
The utility model is applied in gentle breeze speed fields of measurement, the wind speed being particularly well suited to measure between 0~2m/s, and minimum is surveyed
Magnitude reaches 0.05m/s, and precision is high, small in size, with good stability.
The above content is combine specific embodiment further detailed description of the utility model, and it cannot be said that
The specific implementation of the utility model is only limited to these instructions.For the utility model person of an ordinary skill in the technical field
For, without departing from the concept of the premise utility, a number of simple deductions or replacements can also be made, all should be considered as belonging to
In the protection scope of the utility model.
Claims (10)
1. a kind of micro- air velocity transducer, it is characterised in that: it includes probe (1), is set to probe (1) bottom for fixed probe
(1) probe socket (2)；
The probe (1) includes wind speed chip assembly (11), shell (12), top cover (13), shell (12) inner hollow and
Side is equipped with ventilation opening (121), and the wind speed chip assembly (11) is installed in shell (12) and its lower end is pierced by shell (12)
Bottom；The top cover (13) is connected at the top of shell (12)；
The wind speed chip assembly (11) includes insulation support plate (111), insulating substrate (112), hotting mask sensitive body (113), adds
Thermal resistance (116), connection terminal (114), the insulating substrate (112) are vertical on insulation support plate (111), the hotting mask
Sensitive body (113) and adding thermal resistance (116) be bonded set on insulating substrate (112) surface and the hotting mask sensitive body (113) and
Spacing is kept between adding thermal resistance (116), hotting mask sensitive body (113) two sides are equipped with first lead (115a), the heating
Resistance (116) two sides are equipped with the second lead (115b), and the connection terminal (114) is arranged in insulation support plate (111), the company
Connecting terminal (114) includes the first connection terminal that upper end is connected to hotting mask sensitive body (113) by first lead (115a)
(114a), upper end are sub (114b) by the second connection end that the second lead (115b) is connected to adding thermal resistance (116).
2. micro- air velocity transducer according to claim 1, it is characterised in that: the hotting mask sensitive body (113) and heating electricity
Hindering (116) is film platinum resistor.
3. micro- air velocity transducer according to claim 1, it is characterised in that: be equipped with probe peace above the probe socket (2)
Tankage (21), shell (12) the lower part outer wall are fitted and connected with probe mounting groove (21) inner wall；
Shell (12) bottom inside is equipped with the chip assembly mounting groove (122) for installing wind speed chip assembly (11), institute
It states insulation support plate (111) side wall to be fitted and connected with chip assembly mounting groove (122) inner wall, connection terminal (114) lower end
Across chip assembly mounting groove (122) and be pierced by probe mounting groove (21) slot bottom；
Top cover (13) lateral wall is fitted and connected with shell (12) upper inside wall.
4. micro- air velocity transducer according to claim 3, it is characterised in that: the mode that is fitted and connected is encapsulating glue connection
It connects.
5. micro- air velocity transducer according to claim 1, it is characterised in that: top cover (13) lower surface is equipped with for holding
Receive the limiting slot (131) on insulating substrate (112) top.
6. micro- air velocity transducer according to claim 3, it is characterised in that: the sensor further includes jack assemblies (3),
The jack assemblies (3) be set to probe socket (2) bottom and upper end be connected to connection terminal (114) for will pop one's head in (1) be connected to
External control system；
The jack assemblies (3) include connecting plate (31), are arranged in connecting plate (31) and upper and lower ends are pierced by connecting plate (31)
Shank (32), the connecting plate (31) be equipped with for connection terminal (114) lower end insertion through-hole, the shank
(32) with connection terminal (114) the two close to corresponding welding at connecting plate (31) upper surface location；The shank (32) is
Four comprising welded with first shank (32a) of the first connection terminal (114a) welding and with second connection end sub (114b)
The second shank (32b) connect.
7. micro- air velocity transducer according to claim 6, it is characterised in that: the jack assemblies (3) further include being connected to
The reinforced seat (33) of connecting plate (31) bottom, the reinforced seat (33) include being set to the pedestal (331) of connecting plate lower surface and connecting
The plate body (332) for being connected to pedestal (331) side and extending downwardly, shank (32) are arranged in the pedestal (331).
8. micro- air velocity transducer according to claim 7, it is characterised in that: be equipped with socket group below the probe socket (2)
Use is connected in the middle part of part mounting groove (22), the slot bottom of the jack assemblies mounting groove (22) and the slot bottom of probe mounting groove (21)
The through-hole of the connecting plate (31) is inserted into connection terminal (114) bottom end；The jack assemblies mounting groove (22) and connecting plate
(31) side wall is fitted and connected.
9. micro- air velocity transducer according to claim 8, it is characterised in that: the mode that is fitted and connected is encapsulating glue connection
It connects.
10. micro- air velocity transducer according to claim 1, it is characterised in that: it is logical that probe socket (2) two sides are equipped with installation
Hole (23).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821627679.7U CN208736893U (en) | 2018-10-08 | 2018-10-08 | A kind of micro- air velocity transducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821627679.7U CN208736893U (en) | 2018-10-08 | 2018-10-08 | A kind of micro- air velocity transducer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208736893U true CN208736893U (en) | 2019-04-12 |
Family
ID=66035735
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821627679.7U Active CN208736893U (en) | 2018-10-08 | 2018-10-08 | A kind of micro- air velocity transducer |
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| Country | Link |
|---|---|
| CN (1) | CN208736893U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112114167A (en) * | 2020-10-14 | 2020-12-22 | 中国计量科学研究院 | Airflow flow velocity detection and calibration device and system for biological safety cabinet |
-
2018
- 2018-10-08 CN CN201821627679.7U patent/CN208736893U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112114167A (en) * | 2020-10-14 | 2020-12-22 | 中国计量科学研究院 | Airflow flow velocity detection and calibration device and system for biological safety cabinet |
| CN112114167B (en) * | 2020-10-14 | 2022-05-10 | 中国计量科学研究院 | Airflow flow velocity detection and calibration device and system for biological safety cabinet |
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