CN110132319A - A kind of capacitance type sensor of no capacity cell - Google Patents
A kind of capacitance type sensor of no capacity cell Download PDFInfo
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- CN110132319A CN110132319A CN201910390123.3A CN201910390123A CN110132319A CN 110132319 A CN110132319 A CN 110132319A CN 201910390123 A CN201910390123 A CN 201910390123A CN 110132319 A CN110132319 A CN 110132319A
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 188
- 239000010949 copper Substances 0.000 claims abstract description 188
- 229910052802 copper Inorganic materials 0.000 claims abstract description 188
- 239000000615 nonconductor Substances 0.000 claims abstract description 38
- 239000000758 substrate Substances 0.000 claims abstract description 34
- 230000005611 electricity Effects 0.000 claims description 12
- 238000005192 partition Methods 0.000 claims description 10
- 229910000906 Bronze Inorganic materials 0.000 claims description 7
- 239000010974 bronze Substances 0.000 claims description 7
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 claims description 7
- 239000012811 non-conductive material Substances 0.000 claims description 4
- 238000005266 casting Methods 0.000 claims description 3
- 239000000499 gel Substances 0.000 claims description 3
- 238000000465 moulding Methods 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 3
- 230000006698 induction Effects 0.000 abstract description 18
- 239000003990 capacitor Substances 0.000 abstract description 15
- 230000035945 sensitivity Effects 0.000 abstract description 15
- 230000005684 electric field Effects 0.000 description 8
- 230000001960 triggered effect Effects 0.000 description 8
- 239000004020 conductor Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000001939 inductive effect Effects 0.000 description 2
- 239000004615 ingredient Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000007257 malfunction Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
- G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
- G01D5/24—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying capacitance
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Switches That Are Operated By Magnetic Or Electric Fields (AREA)
Abstract
The present invention provides a kind of capacitance type sensors of no capacity cell, belong to sensor technical field.It solves existing capacitance inductor and constantly changes the technical problem for causing inductor sensitivity unstable as temperature changes because there are error, the capacitances of capacity cell between capacitor's capacity individual under the conditions of same hardware.This capacitance type sensor without capacity cell includes the first copper sheet and the second copper sheet for being close to be fixed on substrate top surface and bottom surface respectively, and the upper side of the first copper sheet is closely set in the downside of non-conductor trigger member；First copper sheet and the second copper sheet are electrically connected with chip respectively.This capacitance type sensor obtains more preferably stable induction precision while reducing to element (i.e. capacitor) dependence, this induction precision will not be different by application environment and generation changes, and being consistent property, stability are strong forever.
Description
Technical field
The invention belongs to sensor technical fields, refer in particular to a kind of capacitance type sensor of no capacity cell.
Background technique
Currently, traditional capacitance inductor is in the identical situation of other hardware by the electricity of capacity cell on circuit
Capacitance sets induction sensitivity (distance of reaction).But this kind of capacitance inductor can also have two under the conditions of same hardware
Not amendatory defect: 1, there are errors between capacitor's capacity individual；2, the capacitance of the same capacity cell can be with temperature
Change and constantly change, can not accomplish under the conditions of same hardware under the conditions of various temperature keep induction sensitivity (induction away from
From) consistent.It there will necessarily be a certain proportion of the problem of not incuding or growing induction so as to cause capacitance inductor, and this is asked
Topic belongs to not amendatory scope.
Summary of the invention
The object of the present invention is to provide one kind not to be affected by temperature, stability and the higher capacitance type sensor of precision.
The object of the present invention is achieved like this:
A kind of capacitance type sensor of no capacity cell, which is characterized in that including be close to be fixed on respectively substrate top surface and
The first copper sheet and the second copper sheet of bottom surface, the volume of first copper sheet greater than, equal to or less than second copper sheet volume,
The upper side of first copper sheet is closely set in the downside of non-conductor trigger member, first copper sheet and the second copper sheet respectively with core
Piece electrical connection.
In this capacitance type sensor, non-conductor trigger member is made of non-conductor medium, the first copper sheet and the setting of the second copper sheet
Top and bottom be that in contrast, as long as the first copper sheet is close to assembly with non-conductor trigger member, when use can be used
Finger or the conductor of similar ground connection are triggered across non-conductor trigger member；The present invention passes through the first copper sheet and the second bronze medal on substrate
The distance of the ratio of piece volume or the first copper sheet and the second copper sheet and trigger point adjusts sensitivity (distance of reaction), without
Inducing function can be realized by way of increasing capacity cell on circuit, induction sensitivity (distance of reaction) is not by temperature
It influences, precision and stability is higher, and the seating comfort which can be widely applied to intelligent toilet seat is answered, water dispenser
The field of liquid level induction and the application of other conventional condenser touch-control sensors of equal products.
In a kind of capacitance type sensor of above-mentioned no capacity cell, the thickness of first copper sheet and the second copper sheet
Thickness is identical, and the area of the first copper sheet greater than, equal to or less than second copper sheet area.
In a kind of capacitance type sensor of above-mentioned no capacity cell, the capacitance type sensor includes by non-conductor material
Shell made of expecting, the substrate, the first copper sheet and the second copper sheet are disposed in the housing, and the upside of first copper sheet
It is close to be fixed on the medial surface of shell upper end in face.By the design of seal casinghousing can be avoided humidity/ingredient in outside air/
The change of air pressure causes the dielectric constant of the air contacted with the first copper sheet and the second copper sheet when production to change, it is ensured that shell
Interior dielectric constant of air will not be influenced by external environment, completely cut off steam, be conducive to the stabilization for keeping this capacitance type sensor
Property, improve the precision of this capacitance type sensor.
Filled in a kind of capacitance type sensor of above-mentioned no capacity cell, in the shell full dry air or other
Close or larger than the substance of dielectric constant of air.
In a kind of capacitance type sensor of above-mentioned no capacity cell, two pins of the chip pass through electric wire respectively
It is electrically connected with the first copper sheet and the second copper sheet, when the capacitance of the first copper sheet is greater than the capacitance of the second copper sheet, chip output
High electricity frequency；When capacitance of the capacitance of the first copper sheet less than the second copper sheet, the low electricity frequency of chip output.Above-mentioned first copper sheet
Capacitance=ε Sa/da；The capacitance of second copper sheet=ε Sb/db；Wherein, ε: material dielectric constant；Sa: the first copper sheet
Area；Distance of da: the first copper sheet to trigger point；The area of Sb: the second copper sheet；Distance of db: the second copper sheet to trigger point.
In a kind of capacitance type sensor of above-mentioned no capacity cell, the shell includes upper cover and bottom case, it is described on
Lid and bottom shell surrounds closed accommodating cavity, and the substrate, the first copper sheet and the second copper sheet are set in the accommodating cavity, and described first
The upper side of copper sheet is close to be fixed on the medial surface of upper cover, connects live wire on the substrate, and the electric wire is from upper cover and bottom case
Junction stretch out and connect with housing seal after molding.
Alternatively, the shell includes that can seal fixed upper cover and bottom case, and the substrate is set to upper cover
Between bottom case, the upper side of first copper sheet is close to be fixed on the medial surface of upper cover, is provided on the bottom case by substrate
The space of downside is separated into two pieces of partitions of left chamber, middle chamber and right chamber, the upper end of two pieces of partitions with substrate
Downside is tightly connected, and bottom case, substrate and two pieces of partitions define closed middle chamber, and second copper sheet is set to middle chamber
It is interior, the opening being connected to right chamber is provided on the bottom case.
Alternatively, the shell includes the upper cover of lower ending opening, first copper sheet, substrate and the second copper sheet
It sets gradually from top to bottom, the upper side of first copper sheet is tightly attached to the downside of upper cover, first copper sheet, substrate and
Two copper sheets are greater than the insulating gels casting of air due on upper lid by dielectric constant.
In a kind of capacitance type sensor of above-mentioned no capacity cell, the non-conductor trigger member is led by least one layer is non-
Body material layer is constituted.
Its working principles are as follows:
For capacitor angle, (dielectric constant of ε medium between pole plate, S are polar plate area to C=ε S/d, and d is pole plate
Between distance)
In the present embodiment:
C0=ε0·S0/d0；(wherein, C0For the capacitance of the first copper sheet, S0For the area of the first copper sheet, d0For the first bronze medal
Piece thickness)
C1=ε1·S1/d1；(wherein, C1Capacitance for the upper cover to connect with the first copper sheet, S1For upper cover and the first copper sheet
Connected area, d1For the thickness of upper cover)
C2=ε2·S2/d2；(wherein, C2For the capacitance of non-conductor trigger member, S2For non-conductor trigger member and the first copper sheet
Corresponding area, d2For the thickness of non-conductor trigger member)
C3=ε3·S3/d3；(wherein, C3For the capacitance of air, S3For the area of air corresponding with the first copper sheet, not
D when triggering3=∞)
Pass through more capacitors series connection formula 1/C=1/C1+1/C2+·+1/CnIt can obtain:
It connects on the first copper sheet when not triggering total capacitance value are as follows: 1/C=1/C0+1/C1+1/C2+1/C3, the first bronze medal when triggering
The series connection total capacitance value of on piece are as follows: 1/C=1/C0+1/C1+1/C2。
Similarly the total capacitance value on the second copper sheet remains constant, and chip compares the first copper sheet and the second bronze medal by detection
The variation of the total capacitance value of skin triggers to determine whether.(current this kind of sensor is formed with by connection capacitor member device
Effect triggering namely controls sensitivity, but the capacitance of capacity cell can change with temperature, this will result in inductor not
Incude or what is malfunctioned has occurred, replaces capacitance component that capacitance change would not occur using the second copper sheet in this case now
Change and causes the failure of sensor or having occurred for malfunction.)
For from the angle of electric field and charge, since the first copper sheet and the second copper sheet pass through the pin phase of electric wire and chip
Even, when the chip is working, the first copper sheet and the second copper sheet will form electric field due to connecing its electric surface, under normal circumstances due to first
The area of copper sheet is greater than the area of the second copper sheet, and the capacitance of the first copper sheet is greater than the capacitance of the second copper sheet, and output is high
Electric frequency, chip are not triggered；When finger or the conductor of similar ground connection across non-conductor trigger member to trigger when, will destroy
The electric field that first copper sheet surface is formed, Partial charge can be lost, be equivalent to the first copper sheet and discharge outward, so as to cause the first copper sheet
Capacitance reduce, and the second copper sheet due to distance farther out, electric charge stream vector is less, and capacitance is almost unchanged, when the first bronze medal
When the capacitance of piece is decreased below the capacitance of the second copper sheet, low electricity frequency is exported, chip is triggered；In trigger process, need
The conductor and non-conductor trigger member of finger or similar ground connection have biggish contact area, further, if non-conductor trigger member
It,, may since apart from excessive, charge loss is less when finger is triggered across non-conductor trigger member when thicker
It can will not incude there is a situation where touched, at this time just need to increase the area of the first copper sheet, improve its electric field strength, make
It obtains and has more charge loss across thicker non-conductor trigger member, to enable the capacitor reduced value of the first copper sheet
It is enough to detected by chip, so that the induction sensitivity of this capacitance type sensor is improved, certainly, when changing the first copper sheet area,
The area of second copper sheet will also make the change of adaptability；Similarly, when the thickness of non-conductor trigger member is smaller, also being adapted to property
Reduction the first copper sheet and the area of the second copper sheet reduce induction sensitivity；To sum up, this capacitance type sensor can be according to need
Induction sensitivity is adjusted by adjusting the area of the thickness of non-conductor trigger member and the first copper sheet and the second copper sheet.
The present invention is prominent and beneficial compared with prior art to be had the technical effect that
Capacitive temperature sensor of the invention obtains better sense while reducing to element (i.e. capacitor) dependence
Precision is answered, this induction precision will not be different by application environment and generation changes, and being consistent property, stability are strong forever.
Detailed description of the invention
Fig. 1 is overall structure diagram of the invention.
Fig. 2 is side block diagram of the invention.
Fig. 3 is the structural schematic diagram of shell of the invention.
Fig. 4 is the structural schematic diagram of the another embodiment of shell of the invention.
Fig. 5 is more capacitors series connection schematic diagram of the invention.
In figure, 1, substrate；2, the first copper sheet；3, the second copper sheet；4, non-conductor trigger member；5, shell；6, air；7, on
Lid；8, bottom case；9, electric wire；10, partition；11, left chamber；12, middle chamber；13, right chamber.
Specific embodiment
With specific embodiment, the invention will be further described with reference to the accompanying drawing, referring to Fig. 1-5:
This capacitance type sensor without capacity cell includes the first copper sheet for being close to be fixed on 1 top and bottom of substrate respectively
2 and second copper sheet 3, the volume of first copper sheet 2 greater than, equal to or less than second copper sheet 3 volume, the first copper sheet 2
Upper side be closely set in the downside of non-conductor trigger member 4, first copper sheet 2 and the second copper sheet 3 respectively with chip electricity
Connection；The thickness of first copper sheet 2 is identical as the thickness of the second copper sheet 3, and the area of the first copper sheet 2 greater than, equal to or
Less than the area of second copper sheet 3；The non-conductor trigger member 4 is made of at least one layer of non-conductive material layer.This condenser type
Non-conductor trigger member 4 is made of non-conductor medium in sensor, and the top and bottom of the first copper sheet 2 and the setting of the second copper sheet 3 are
In contrast, it as long as the first copper sheet 2 is close to assembly with non-conductor trigger member 4, with finger or similar can connect when use
The conductor on ground is triggered across non-conductor trigger member 4；The present invention passes through 3 volume of the first copper sheet 2 and the second copper sheet on substrate 1
The distance of ratio or the first copper sheet 2 and the second copper sheet 3 and trigger point adjusts sensitivity (distance of reaction), without passing through electricity
Inducing function can be realized in the mode that road increases capacity cell, and induction sensitivity (distance of reaction) is not influenced by temperature,
Precision and stability is higher, and the seating comfort which can be widely applied to intelligent toilet seat is answered, and water dispenser etc. produces
The liquid level of product incudes and the field of other conventional condenser touch-control sensors application；Capacitive temperature sensor of the invention is subtracting
While dependence less element (i.e. capacitor), better induction precision is obtained, this induction precision will not be by application environment not
Change is generated together, and being consistent property, stability are strong forever.
As shown in Figures 2 and 3, the capacitance type sensor includes shell 5 made of non-conductive material, the substrate 1,
First copper sheet 2 and the second copper sheet 3 are set in the shell 5, and the upper side abutting of first copper sheet 2 is fixed on shell 5
The medial surface of upper end；Full dry air 6 is filled in the shell 5 or other are close or larger than the substance of 6 dielectric constant of air；Institute
Two pins for stating chip pass through electric wire 9 respectively and are electrically connected with the first copper sheet 2 and the second copper sheet 3, when the capacitance of the first copper sheet 2
Greater than the second copper sheet 3 capacitance when, the high electricity frequency of chip output；When the first copper sheet 2 capacitance less than the second copper sheet 3 capacitor
When value, the low electricity frequency of chip output.It can be avoided humidity/ingredient/air pressure in outside air 6 by the design of seal casinghousing 5
Changing causes the dielectric constant of the air 6 contacted with the first copper sheet 2 and the second copper sheet 3 when production to change, it is ensured that in shell 5
6 dielectric constant of air will not be influenced by external environment, completely cut off steam, be conducive to the stabilization for keeping this capacitance type sensor
Property, improve the precision of this capacitance type sensor；State capacitance=ε Sa/da of the first copper sheet 2；The capacitance of second copper sheet 3=
ε·Sb/db；Wherein, ε: material dielectric constant；The area of Sa: the first copper sheet 2；Da: the first copper sheet 2 arrives the distance of trigger point；
The area of Sb: the second copper sheet 3；Db: the second copper sheet 3 arrives the distance of trigger point.
Further, the shell 5 includes upper cover 7 and bottom case 8, and the upper cover 7 and bottom case 8 surround closed accommodating cavity,
The substrate 1, the first copper sheet 2 and the second copper sheet 3 are set in the accommodating cavity, and the upper side of first copper sheet 2 is close to fix
In connecting live wire 9 on the medial surface of upper cover 7, the substrate 1, the electric wire 9 stretches out simultaneously from the junction of upper cover 7 and bottom case 8
It is tightly connected with shell 5 after molding.
Alternatively, the shell 5 includes that can seal fixed upper cover 7 and bottom case 8, and the substrate 1 is set to
Between upper cover 7 and bottom case 8, the upper side of first copper sheet 2 is close to be fixed on the medial surface of upper cover 7, is arranged on the bottom case 8
There is the space by 1 downside of substrate to be separated into two pieces of partitions 10 of left chamber 11, middle chamber 12 and right chamber 13, two pieces of partitions
10 upper end is tightly connected with the downside of substrate 1, and bottom case 8, substrate 1 and two pieces of partitions 10 define closed middle chamber
12, second copper sheet 3 is set in middle chamber 12, is provided with the opening being connected to right chamber 13 on the bottom case 8.
Alternatively, the shell 5 includes the upper cover 7 of lower ending opening, first copper sheet 2, substrate 1 and second
Copper sheet 3 is set gradually from top to bottom, and the upper side of first copper sheet 2 is tightly attached to the downside of upper cover 7, first copper sheet 2,
Substrate 1 and the second copper sheet 3 are scheduled in upper cover 7 by the insulating gels casting that dielectric constant is greater than air 6.
For capacitor angle, (dielectric constant of ε medium between pole plate, S are polar plate area to C=ε S/d, and d is pole plate
Between distance)
In the present embodiment:
C0=ε0·S0/d0；(wherein, C0For the capacitance of the first copper sheet 2, S0For the area of the first copper sheet 2, d0It is first
2 thickness of copper sheet)
C1=ε1·S1/d1；(wherein, C1Capacitance for the upper cover 7 to connect with the first copper sheet 2, S1For upper cover 7 and first
The connected area of copper sheet 2, d1For the thickness of upper cover 7)
C2=ε2·S2/d2；(wherein, C2For the capacitance of non-conductor trigger member 4, S2For non-conductor trigger member 4 and the first bronze medal
The corresponding area of piece 2, d2For the thickness of non-conductor trigger member 4)
C3=ε3·S3/d3；(wherein, C3For the capacitance of air 6, S3For the area of air 6 corresponding with the first copper sheet 2,
D when not triggering3=∞)
Pass through more capacitors series connection formula 1/C=1/C1+1/C2+·+1/CnIt can obtain:
It connects on the first copper sheet 2 when not triggering total capacitance value are as follows: 1/C=1/C0+1/C1+1/C2+1/C3, first when triggering
Series connection total capacitance value on copper sheet 2 are as follows: 1/C=1/C0+1/C1+1/C2。
Similarly the total capacitance value on the second copper sheet 3 remains constant, and chip compares the first copper sheet 2 and second by detection
The variation of the total capacitance value of copper sheet triggers to determine whether.(current this kind of sensor is formed by connection capacitor member device
Effectively triggering namely controls sensitivity, but the capacitance of capacity cell can change with temperature, this will result in inductor
Do not incude or what is malfunctioned has occurred, replaces capacitance component that would not hold using the second copper sheet 3 in this case now
Value changes and causes the failure of sensor or having occurred for malfunction.)
For from the angle of electric field and charge, since the first copper sheet 2 and the second copper sheet 3 pass through the pin of electric wire 9 and chip
Be connected, when the chip is working, the first copper sheet 2 and the second copper sheet 3 will form electric field due to connecing its electric surface, under normal circumstances due to
The area of first copper sheet 2 is greater than the area of the second copper sheet 3, and the capacitance of the first copper sheet 2 is greater than the capacitance of the second copper sheet 3
, high electricity frequency is exported, chip is not triggered；When the conductor of finger or similar ground connection is triggered across non-conductor trigger member 4
It waits, the electric field of 2 surface of the first copper sheet formation will be destroyed, Partial charge can be lost, be equivalent to the first copper sheet 2 and discharge outward, from
And the capacitance of the first copper sheet 2 is caused to reduce, and the second copper sheet 3 is since apart from farther out, electric charge stream vector is less, and capacitance is several
It is constant, when the capacitance of the first copper sheet 2 is decreased below the capacitance of the second copper sheet 3, low electricity frequency is exported, chip is touched
Hair；In trigger process, the conductor of finger or similar ground connection and non-conductor trigger member 4 is needed to have biggish contact area, further
, if non-conductor trigger member 4 is thicker, when finger is triggered across non-conductor trigger member 4, due to apart from mistake
Greatly, charge loss is less, it may occur that touched the case where will not incuding, at this time just needs to increase the first copper sheet 2
Area improves its electric field strength, so that more charge loss is had across thicker non-conductor trigger member 4, thus
Enable the capacitor reduced value of the first copper sheet 2 detected by chip, so that the induction sensitivity of this capacitance type sensor is improved,
Certainly, when changing the first 2 area of copper sheet, the area of the second copper sheet 3 will also make the change of adaptability；Similarly, when non-conductor triggers
When the thickness of part 4 is smaller, also the area of reduction the first copper sheet 2 and the second copper sheet 3 of being adapted to property reduces induction sensitivity；
To sum up, thickness and the first copper sheet 2 and second that this capacitance type sensor can according to need by adjusting non-conductor trigger member 4
The area of copper sheet 3 adjusts induction sensitivity.
Above-described embodiment is only presently preferred embodiments of the present invention, is not limited the scope of the invention according to this, therefore: it is all according to
The equivalence changes that structure of the invention, shape, principle are done, should all be covered by within protection scope of the present invention.
Claims (9)
1. a kind of capacitance type sensor of no capacity cell, which is characterized in that including being close to fixed substrate (1) top surface and bottom respectively
First copper sheet (2) and the second copper sheet (3) in face, the upper side of the first copper sheet (2) are closely set under non-conductor trigger member (4)
Side, first copper sheet (2) and the second copper sheet (3) are electrically connected with chip respectively.
2. a kind of capacitance type sensor of no capacity cell according to claim 1, it is characterised in that: first copper sheet
(2) thickness is identical as the thickness of the second copper sheet (3).
3. a kind of capacitance type sensor of no capacity cell according to claim 1, it is characterised in that: the condenser type passes
Sensor includes the shell made of non-conductive material (5), and the substrate (1), the first copper sheet (2) and the second copper sheet (3) are set to institute
It states in shell (5), and the upper side of first copper sheet (2) is close to be fixed on the medial surface of shell (5) upper end.
4. a kind of capacitance type sensor of no capacity cell according to claim 3, it is characterised in that: the shell (5)
The completely dry air (6) of interior filling or other be close or larger than the non-conductor substance of air (6) dielectric constant.
5. a kind of capacitance type sensor of no capacity cell according to any one of claims 1-4, this case is with the first bronze medal
Son explanation is it is characterized by: two pins of the chip pass through electric wire (9) respectively for piece volume is greater than the second copper sheet volume
Be electrically connected with the first copper sheet (2) and the second copper sheet (3), when the first copper sheet (2) capacitance less than the second copper sheet (3) capacitance
When, the high electricity frequency of chip output；When the capacitance of the first copper sheet (2) is greater than the capacitance of the second copper sheet (3), chip exports low electricity
Frequently.
6. a kind of capacitance type sensor of no capacity cell according to claim 3 or 4, it is characterised in that: the shell
It (5) include upper cover (7) and bottom case (8), the upper cover (7) and bottom case (8) surround closed accommodating cavity, the substrate (1), first
Copper sheet (2) and the second copper sheet (3) are set in the accommodating cavity, and the upper side abutting of first copper sheet (2) is fixed on upper cover (7)
Medial surface, connect live wire (9) on the substrate (1), the electric wire (9) is from the stretching of the junction of upper cover (7) and bottom case (8)
And it is tightly connected with shell after molding (5).
7. a kind of capacitance type sensor of no capacity cell according to claim 3 or 4, it is characterised in that: the shell
It (5) include that can seal fixed upper cover (7) and bottom case (8), the substrate (1) is set between upper cover (7) and bottom case (8), institute
The upper side for stating the first copper sheet (2) is close to be fixed on the medial surface of upper cover (7), and being provided on the bottom case (8) will be under substrate (1)
The space of side is separated into two pieces of partitions (10) of left chamber (11), middle chamber (12) and right chamber (13), two pieces of partitions
(10) upper end is tightly connected with the downside of substrate (1), and bottom case (8), substrate (1) and two pieces of partitions (10) define closing
Middle chamber (12), second copper sheet (3) be set to middle chamber (12) in, be provided on the bottom case (8) with right chamber (13)
The opening of connection.
8. a kind of capacitance type sensor of no capacity cell according to claim 3 or 4, it is characterised in that: the shell
(5) include lower ending opening upper cover (7), first copper sheet (2), substrate (1) and the second copper sheet (3) are successively set from top to bottom
It sets, the upper side of first copper sheet (2) is tightly attached to the downside of upper cover (7), first copper sheet (2), substrate (1) and second
Copper sheet (3) is greater than the insulating gels casting of air due on upper cover (7) by dielectric constant.
9. a kind of capacitance type sensor of no capacity cell according to any one of claims 1-4, it is characterised in that: institute
Non-conductor trigger member (4) is stated to be made of at least one layer of non-conductive material layer.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820706347 | 2018-05-11 | ||
| CN2018207063471 | 2018-05-11 |
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| Publication Number | Publication Date |
|---|---|
| CN110132319A true CN110132319A (en) | 2019-08-16 |
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| CN201910390123.3A Pending CN110132319A (en) | 2018-05-11 | 2019-05-10 | A kind of capacitance type sensor of no capacity cell |
| CN201920672259.9U Active CN210154592U (en) | 2018-05-11 | 2019-05-10 | Capacitive sensor without capacitive element |
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| CN201920672259.9U Active CN210154592U (en) | 2018-05-11 | 2019-05-10 | Capacitive sensor without capacitive element |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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