CN105806516B - Pressure sensor and method for detecting pressure value - Google Patents
Pressure sensor and method for detecting pressure value Download PDFInfo
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- CN105806516B CN105806516B CN201610232766.1A CN201610232766A CN105806516B CN 105806516 B CN105806516 B CN 105806516B CN 201610232766 A CN201610232766 A CN 201610232766A CN 105806516 B CN105806516 B CN 105806516B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/14—Measuring force or stress, in general by measuring variations in capacitance or inductance of electrical elements, e.g. by measuring variations of frequency of electrical oscillators
- G01L1/142—Measuring force or stress, in general by measuring variations in capacitance or inductance of electrical elements, e.g. by measuring variations of frequency of electrical oscillators using capacitors
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Abstract
The embodiment of the invention provides a pressure sensor and a method for detecting a pressure value, which relate to sensors and can improve the accuracy of pressure value detection of the pressure sensor, and the pressure sensor comprises: a detection region, the detection region comprising: the pressure detecting device comprises at least one detecting unit, wherein the detecting unit comprises at least one layer of capacitor plate and at least one layer of elastic transparent insulating material connected with the capacitor plate.
Description
The patent application of the invention is a divisional application, and the application numbers of the original application are as follows: 201210345912.3, filing date: 9, 17 days 2012, the invention name is: a pressure sensor and a method of detecting a pressure value.
Technical Field
The present invention relates to a sensor, and more particularly, to a pressure sensor and a method of detecting a pressure value.
Background
In the prior art, a pressure sensor is applied to each pixel of a display, and is mainly implemented by a pressure sensitive material, and the pressure generated is converted into electric energy, so that the display is applied.
However, the pressure sensor implemented by the pressure sensitive material in the prior art has low accuracy in acquiring pressure and low sensitivity in acquiring pressure.
Disclosure of Invention
The embodiment of the invention provides a pressure sensor and a method for detecting a pressure value, which can improve the accuracy of pressure value detection of the pressure sensor.
In order to achieve the above purpose, the embodiment of the invention adopts the following technical scheme:
in one aspect, an embodiment of the present invention provides a pressure sensor, including: a detection region, the detection region comprising: the detection unit comprises at least one layer of capacitor plate and at least one layer of elastic transparent insulating material connected with the capacitor plate.
In another aspect, an embodiment of the present invention provides a method for detecting a pressure value, including:
when the deformation of an elastic transparent insulating material of a pressure sensor is detected, a capacitance value corresponding to the deformation of the elastic transparent insulating material is obtained;
and obtaining a pressure value corresponding to the deformation of the elastic transparent insulating material according to the capacitance value.
By adopting the pressure sensor and the method for detecting the pressure value, the pressure sensor has the advantage that the pressure sensor can detect the pressure value with high accuracy by improving the sensitivity of pressure acquisition by utilizing at least one layer of elastic insulating material connected with the capacitor plate.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a pressure sensor according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of another pressure sensor provided in an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of another pressure sensor provided in an embodiment of the present invention;
fig. 4 is a schematic diagram of a method for detecting a pressure value according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
An embodiment of the present invention provides a pressure sensor, including: a detection region, the detection region comprising: the detection unit comprises at least one layer of capacitor plate and at least one layer of elastic transparent insulating material connected with the capacitor plate.
Wherein, adopt this transparent insulating material of elasticity not only to make the region of treating the operation of the definite of user's ability convenience, convenience of customers is to the location of operation region, makes the capacitance value that pressure and the electric capacity piece that this pressure sensor gathered produced more accurate moreover, and like this, the pressure value that the user obtained through the capacitance value is more accurate.
Optionally, when the detection area includes at least two detection units, and the detection unit is composed of a layer of capacitor plate and a layer of elastic transparent insulating material connected to the layer of capacitor plate, the elastic transparent insulating material covers the capacitor plate.
Further, when the detection unit detects that the elastic transparent insulating material deforms, the capacitance value of the capacitor plate corresponds to a pressure value corresponding to the deformation of the elastic transparent insulating material, and specifically, the pressure value can be obtained by querying a preset relation comparison table of the capacitance value and the pressure value.
For example, the pressure sensor shown in fig. 1 includes two sensing units (i.e., sensing unit a and sensing unit B) each including a layer of capacitive plate and a layer of elastic transparent insulating material attached to the capacitive plate. When the user presses the elastic transparent insulating material in the detection area in the detection unit a through the operation body such as a finger (at this time, it is equivalent to grounding through the operation body to the pressure sensor), the generated pressure makes the elastic transparent insulating material deform, and the pressure value corresponding to the pressure corresponds to the capacitance value of the capacitor plate when the elastic transparent insulating material deforms, so that the pressure value of the pressure can be obtained through the capacitance value of the capacitor plate.
Preferably, in order to improve the pressure acquisition capability of the pressure sensor and the accuracy of pressure detection, a layer of capacitor plate can be added on the elastic transparent insulating material, when the detection unit detects that the elastic transparent insulating material is deformed, the ratio of the capacitance value of the capacitor plate positioned on the upper layer of the elastic transparent insulating material to the capacitance value of the capacitor plate positioned on the lower layer of the elastic transparent insulating material corresponds to the pressure value corresponding to the deformation of the elastic transparent insulating material, so that the error between the obtained pressure value and the pressure value corresponding to the actual pressure can be reduced through the acquisition of the upper layer of the capacitor plate and the lower layer of the capacitor plate.
The pressure value obtained by the capacitance value of the capacitance sheet may be obtained by a preset comparison table of a relationship between the pressure value and the capacitance value, which is not limited in the embodiment of the present invention.
Optionally, when the detection area includes at least two detection units, and the detection unit is composed of at least two layers of capacitor plates and at least two layers of elastic transparent insulating materials connected to the at least two layers of capacitor plates, the detection unit is formed by spacing the capacitor plates and the elastic transparent insulating materials from each other, wherein the lowest layer of the detection unit is a capacitor plate.
The resolution ratio when adopting two at least detecting element can improve this pressure sensor collection pressure for the detection to the pressure value is more accurate, however, owing to adopt a plurality of detecting element can increase the technology complexity and the cost of manufacture of this pressure sensor preparation, consequently, under the condition that does not increase manufacturing technology and cost of manufacture, can improve the accuracy of the detection to the pressure value through setting up a plurality of detecting element.
Further, when the detection unit detects that the elastic transparent insulating material deforms, the ratio of the capacitance value of the capacitor plate located on the upper layer of the elastic transparent insulating material to the capacitance value of the capacitor plate located on the lower layer of the elastic transparent insulating material corresponds to a pressure value corresponding to the deformation of the elastic transparent insulating material, so that the error of the obtained pressure value and the pressure value corresponding to the actual pressure is reduced.
For example, as shown in fig. 2, the device comprises three detection units, which are respectively denoted as a detection unit a, a detection unit B and a detection unit C, wherein the detection unit a, the detection unit B and the detection unit C respectively comprise two layers of capacitor plates and a layer of elastic transparent insulating material connected with the two layers of capacitor plates; wherein, the electric capacity piece that meets with this transparent insulating material upper strata is marked as upper capacitor piece, the electric capacity piece that meets with this transparent insulating material lower floor is marked as lower floor's electric capacity piece, when the user pressed the operation such as the operation body through fingers to detecting element B upper capacitor piece in the detection area, the pressure that produces makes elastic transparent insulating material take place deformation, simultaneously, this pressure acts on lower floor's electric capacity piece through this elastic transparent insulating material, at this moment, the user can learn the electric capacity value that upper capacitor piece corresponds and the electric capacity value that lower floor's electric capacity piece corresponds when elastic transparent insulating material deforms respectively, because the pressure value of this pressure corresponds with the ratio of the electric capacity value that this upper capacitor piece corresponds and the electric capacity value that lower floor's electric capacity piece corresponds, consequently, the pressure value of this pressure can be obtained through the ratio of the electric capacity value that two-layer electric capacity piece corresponds.
The pressure value of the pressure obtained by the ratio of the capacitance values corresponding to the two layers of capacitance sheets can be obtained by a preset relation comparison table of the capacitance ratio and the pressure value, which is not limited in the embodiment of the invention.
Optionally, when the detection area includes a detection unit, and the detection unit is composed of at least three layers of capacitor sheets and at least two layers of elastic transparent insulating materials connected to the at least three layers of capacitor sheets, the detection unit is formed by the capacitor sheets and the elastic transparent insulating materials at intervals, wherein the uppermost layer and the lowermost layer of the detection unit are capacitor sheets, and the rest of the capacitor sheets except the lowermost layer of the capacitor sheets are divided into at least two capacitor areas, so that the pressure sensor improves the sensitivity to pressure acquisition through the at least two capacitor areas, and further improves the accuracy of pressure detection.
In practical application, in order to simplify the manufacturing process and save the manufacturing cost, a detection unit is usually adopted, and meanwhile, in order to ensure that the pressure sensor is more sensitive to pressure acquisition, a plurality of capacitance areas are usually divided on an upper-layer capacitance sheet of the detection unit, so that the resolution of the upper-layer capacitance sheet when acquiring pressure is improved, and thus, when a user operates the upper-layer capacitance sheet through an operation body such as a finger, the error of pressure data acquired through the plurality of capacitance areas of the upper-layer capacitance sheet is smaller; in addition, in order to further improve the pressure acquisition capability and the pressure detection accuracy of the pressure sensor, on the basis of the original two-layer capacitor plate (i.e. an upper capacitor plate and a lower capacitor plate) structure, a layer of capacitor plate (i.e. a middle capacitor plate) can be added, and correspondingly, a layer of elastic transparent insulating material is added, i.e. the structure shown in fig. 3, preferably, a plurality of capacitor areas can be divided on the middle capacitor plate, so that when pressure is transmitted to the middle capacitor plate through the elastic transparent insulating material, the error of pressure data acquired through the plurality of capacitor areas of the upper capacitor plate is smaller, therefore, the error between the obtained pressure value and the pressure value corresponding to the actual pressure can be reduced through the pressure sensor, and the detection result is more accurate; of course, the more the capacitance sheets are added, the smaller the final error, but considering the process complexity and the manufacturing cost for manufacturing the pressure sensor in practical application, the error between the obtained pressure value and the pressure value corresponding to the actual pressure should be reduced as much as possible without increasing the manufacturing process and the manufacturing cost.
Further, when the detection unit detects that the elastic transparent insulating material deforms, the ratio of the capacitance value of the capacitor plate located on the upper layer of the elastic transparent insulating material to the capacitance value of the capacitor plate located on the lower layer of the elastic transparent insulating material corresponds to a pressure value corresponding to the deformation of the elastic transparent insulating material, and the error between the obtained pressure value and the pressure value corresponding to the actual pressure can be reduced through the corresponding relation.
For example, as shown in fig. 3, the device comprises a detection unit, wherein the detection unit comprises a three-layer capacitor plate and two layers of elastic transparent insulating materials (denoted as elastic transparent insulating material a and elastic transparent insulating material B) connected with the three-layer capacitor plate; wherein, the capacitor plate connected with the upper layer of the elastic transparent insulating material A is an upper capacitor plate, the capacitor plate connected with the lower layer of the elastic transparent insulating material B is a lower capacitor plate, the capacitor plates respectively connected with the elastic transparent insulating material A and the elastic transparent insulating material B are middle capacitor plates, as can be seen from the figure, the upper capacitor plates are respectively four capacitor areas, the middle capacitor plates are divided into two capacitor areas, when a user presses the upper capacitor plates of the detection units in the detection area through an operation body such as a finger and the like, the four capacitor areas of the upper capacitor plates collect the pressure generated by the pressing operation of the user, the pressure enables the elastic transparent insulating material A to deform and act on the middle capacitor plates, the two capacitor areas of the middle capacitor plates collect the pressure, the pressure continues to enable the elastic transparent insulating material B to deform and act on the lower capacitor plates, this pressure is gathered to lower floor's electric capacity piece, because the ratio of the capacitance value of upper capacitor piece and the capacitance value of middle level electric capacity piece is subtracted to the capacitance value of upper capacitor piece and the ratio of the capacitance value of middle level electric capacity piece and the pressure value of this pressure corresponds through the ratio of the capacitance value of upper capacitor piece and the capacitance value of lower floor's electric capacity piece, like this, the ratio of the capacitance value of upper capacitor piece and the capacitance value of middle level electric capacity piece is subtracted to the capacitance value of upper capacitor piece through the capacitance value of upper capacitor piece.
The pressure value obtained by subtracting the ratio of the capacitance value of the upper layer capacitor plate to the capacitance value of the middle layer capacitor plate from the ratio of the capacitance value of the upper layer capacitor plate to the capacitance value of the lower layer capacitor plate can be obtained by a preset relation comparison table, which is not limited in the embodiment of the invention.
In addition, the more the capacitor regions divided by the capacitor plates, the higher the accuracy of pressure acquisition, but the process for dividing the capacitor regions by the capacitor plates is complicated, so the maximum accuracy of pressure acquisition should be realized in the capacitor regions divided by the capacitor plates without increasing the manufacturing cost.
It should be noted that, the at least two layers of elastic transparent insulating materials may be different materials, which is not limited in the present invention.
Therefore, by adopting the pressure sensor, the pressure sensor utilizes at least one layer of elastic insulating material connected with the capacitor plate, and the pressure acquisition sensitivity is improved, so that the pressure value detection accuracy of the pressure sensor is improved.
For the pressure sensor, an embodiment of the present invention further provides a method for detecting a pressure value, as shown in fig. 4, where an execution main body of the embodiment is the pressure sensor, and the method includes:
s401, when the deformation of the elastic transparent insulating material of the pressure sensor is detected, the pressure sensor obtains a capacitance value corresponding to the deformation of the elastic transparent insulating material.
Wherein, adopt this transparent insulating material of elasticity not only to make the region of treating the operation of the definite of user's ability convenience, convenience of customers is to the location of operation region, makes the capacitance value that pressure and the electric capacity piece that this pressure sensor gathered produced more accurate moreover, and like this, the pressure value that the user obtained through the capacitance value is more accurate.
S402, the pressure sensor obtains a pressure value corresponding to the elastic transparent insulating material deformation according to the capacitance value.
Optionally, when the detection area of the pressure sensor includes at least two detection units, and the detection unit is formed by covering a layer of capacitor sheet with a layer of elastic transparent insulating material, the pressure sensor obtains a pressure value corresponding to the deformation of the elastic transparent insulating material through a capacitance value of the capacitor sheet.
In particular, reference is made to the above description of fig. 1, which is not repeated here.
Optionally, when the detection area includes at least two detection units, and the detection unit is formed by at least two layers of capacitor plates and at least two layers of elastic transparent insulating materials that are connected at intervals, and the lowest layer of the detection unit is a capacitor plate, the pressure sensor obtains the pressure value corresponding to the deformation of the elastic transparent insulating material through a ratio of a capacitance value of the capacitor plate on the upper layer of the elastic transparent insulating material to a capacitance value of the capacitor plate on the lower layer of the elastic transparent insulating material, so as to reduce an error of the obtained pressure value corresponding to the actual pressure.
The resolution ratio when adopting two at least detecting element can improve this pressure sensor collection pressure for the detection to the pressure value is more accurate, however, owing to adopt a plurality of detecting element can increase the technology complexity and the cost of manufacture of this pressure sensor preparation, consequently, under the condition that does not increase manufacturing technology and cost of manufacture, can improve the accuracy of the detection to the pressure value through setting up a plurality of detecting element.
In particular, reference is made to the above description of fig. 2, which is not repeated here.
Optionally, when the detection area includes a detection unit, the detection unit is composed of at least three layers of capacitor plates and at least two layers of elastic transparent insulating materials connected to the at least three layers of capacitor plates, the detection unit is formed by spacing the capacitor plates and the elastic transparent insulating materials, the uppermost layer and the lowermost layer of the detection unit are capacitor plates, and the other capacitor plates except the lowermost capacitor plate are divided into at least two capacitor areas, the pressure sensor obtains the pressure value corresponding to the deformation of the elastic transparent insulating material through a ratio of a capacitance value of the capacitor plate on the upper layer of the elastic transparent insulating material to a capacitance value of the capacitor plate on the lower layer of the elastic transparent insulating material, and an error of the obtained pressure value corresponding to the actual pressure can be reduced through the correspondence.
In practical application, in order to simplify the manufacturing process and save the manufacturing cost, a detection unit is usually adopted, and meanwhile, in order to ensure that the pressure sensor is more sensitive to pressure acquisition, a plurality of capacitance areas are usually divided on an upper-layer capacitance sheet of the detection unit, so that the resolution of the upper-layer capacitance sheet when acquiring pressure is improved, and thus, when a user operates the upper-layer capacitance sheet through an operation body such as a finger, the error of pressure data acquired through the plurality of capacitance areas of the upper-layer capacitance sheet is smaller; in addition, in order to further improve the pressure acquisition capability and the pressure detection accuracy of the pressure sensor, on the basis of the original two-layer capacitor plate (i.e. an upper capacitor plate and a lower capacitor plate) structure, a layer of capacitor plate (i.e. a middle capacitor plate) can be added, and correspondingly, a layer of elastic transparent insulating material is added, i.e. the structure shown in fig. 3, preferably, a plurality of capacitor areas can be divided on the middle capacitor plate, so that when pressure is transmitted to the middle capacitor plate through the elastic transparent insulating material, the error of pressure data acquired through the plurality of capacitor areas of the upper capacitor plate is smaller, therefore, the error between the obtained pressure value and the pressure value corresponding to the actual pressure can be reduced through the pressure sensor, and the detection result is more accurate; of course, the more the capacitance sheets are added, the smaller the final error, but considering the process complexity and the manufacturing cost for manufacturing the pressure sensor in practical application, the error between the obtained pressure value and the pressure value corresponding to the actual pressure should be reduced as much as possible without increasing the manufacturing process and the manufacturing cost.
In particular, reference is made to the above description of fig. 3, which is not repeated here.
It should be noted that, the at least two layers of elastic transparent insulating materials may be different materials, which is not limited in the present invention.
Therefore, by adopting the method for detecting the pressure value, the pressure sensor can improve the pressure value detection accuracy by improving the sensitivity of pressure acquisition by utilizing at least one layer of elastic insulating material connected with the capacitor plate.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (2)
1. A pressure sensor, comprising: a detection region, the detection region comprising: the detection unit is formed by the capacitor piece and the elastic transparent insulating material at intervals, wherein the uppermost layer and the lowermost layer of the detection unit are the capacitor pieces, and the rest capacitor pieces except the lowermost capacitor piece are divided into at least two capacitor areas; when the detection unit detects that the elastic transparent insulating material deforms, the ratio of the capacitance value of the capacitor plate positioned on the upper layer of the elastic transparent insulating material to the capacitance value of the capacitor plate positioned on the lower layer of the elastic transparent insulating material corresponds to a pressure value corresponding to the deformation of the elastic transparent insulating material;
the at least two layers of elastic transparent insulating material are different.
2. A method for detecting a pressure value, which is applied to the pressure sensor provided in claim 1, the method comprising:
when deformation of an elastic transparent insulating material of a pressure sensor is detected, acquiring the ratio of the capacitance value of a capacitor plate on the upper layer of the elastic transparent insulating material to the capacitance value of a capacitor plate on the lower layer of the elastic transparent insulating material;
and obtaining a pressure value corresponding to the deformation of the elastic transparent insulating material according to the ratio.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610232766.1A CN105806516B (en) | 2012-09-17 | 2012-09-17 | Pressure sensor and method for detecting pressure value |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610232766.1A CN105806516B (en) | 2012-09-17 | 2012-09-17 | Pressure sensor and method for detecting pressure value |
| CN201210345912.3A CN103674350B (en) | 2012-09-17 | 2012-09-17 | A kind of method of pressure transmitter and detecting pressure value |
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| CN201210345912.3A Division CN103674350B (en) | 2012-09-17 | 2012-09-17 | A kind of method of pressure transmitter and detecting pressure value |
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| CN105806516A CN105806516A (en) | 2016-07-27 |
| CN105806516B true CN105806516B (en) | 2021-09-14 |
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Citations (6)
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| US20020194921A1 (en) * | 2001-06-23 | 2002-12-26 | Wolfgang Scholz | Capacitive differential pressure sensor |
| CN101421590A (en) * | 2006-02-10 | 2009-04-29 | 美利肯公司 | Printed capacitive sensor |
| CN101421692A (en) * | 2006-02-10 | 2009-04-29 | 美利肯公司 | Flexible capacitive sensor |
| CN102053750A (en) * | 2009-11-06 | 2011-05-11 | 索尼公司 | Sensing device and electronic device |
| CN102165297A (en) * | 2008-11-21 | 2011-08-24 | 鹰野株式会社 | Capacitive dynamic quantity sensor element and dynamic quantity sensor |
| CN102667695A (en) * | 2009-12-22 | 2012-09-12 | 日本写真印刷株式会社 | Touch panel and portable device using same |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103674350B (en) * | 2012-09-17 | 2016-06-01 | 联想(北京)有限公司 | A kind of method of pressure transmitter and detecting pressure value |
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2012
- 2012-09-17 CN CN201610232766.1A patent/CN105806516B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020194921A1 (en) * | 2001-06-23 | 2002-12-26 | Wolfgang Scholz | Capacitive differential pressure sensor |
| CN101421590A (en) * | 2006-02-10 | 2009-04-29 | 美利肯公司 | Printed capacitive sensor |
| CN101421692A (en) * | 2006-02-10 | 2009-04-29 | 美利肯公司 | Flexible capacitive sensor |
| CN102165297A (en) * | 2008-11-21 | 2011-08-24 | 鹰野株式会社 | Capacitive dynamic quantity sensor element and dynamic quantity sensor |
| CN102053750A (en) * | 2009-11-06 | 2011-05-11 | 索尼公司 | Sensing device and electronic device |
| CN102667695A (en) * | 2009-12-22 | 2012-09-12 | 日本写真印刷株式会社 | Touch panel and portable device using same |
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