CN104935320A - Method for detecting state of capacitive touch key - Google Patents
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Abstract
The invention discloses a method for detecting a state of a capacitive touch key, compares a current count value of a counter with a baseline value, and judges whether the capacitive touch key is effectively touched by analyzing the variable quantity of the current count value relative to the baseline value and time of duration. In addition, when the variable quantity of the current count value relative to the baseline value is larger than a baseline variation threshold and is smaller than a key response threshold, the baseline value needs to be updated, i.e., by setting the baseline variation threshold and the key response threshold, that environment temperature variation influences the baseline value is reflected, thereby updating the baseline value when environment temperature varies, improving a capability of being resistant to interference of environment temperature, and improving detection precision. In addition, the baseline value is not a numerical value set in a unified manner, but varies at any time according to the environment temperature, and thus influence of technological deviations of different chips on detection of the state of the capacitive touch key is also eliminated.
Description
Technical Field
The invention relates to the technical field of capacitive touch, in particular to a method for detecting the state of a capacitive touch key.
Background
The initial mechanical keys are generally operated by pressing, rotating and other time functions, and the mechanical keys are easily worn and have short service life, and then gradually replaced by touch keys. The touch keys mainly comprise a resistance type touch key and a capacitance type touch key, and the resistance type touch key is low in durability and light transmission, so that the capacitance type touch key becomes the mainstream of touch technology.
Disclosure of Invention
In view of this, the present invention provides a method for detecting a state of a capacitive touch key, which has strong anti-interference capability against ambient temperature and high detection accuracy.
In order to achieve the purpose, the invention provides the following technical scheme:
a method for detecting the state of a capacitive touch key comprises the following steps:
s1, acquiring the current count value of the counter, judging whether the variation of the current count value compared with the current baseline value is larger than the key response threshold value, if not, entering the step S2; if yes, go to step S3;
s2, judging whether the variation is larger than a baseline variation threshold value, if so, updating the baseline value; if not, ignoring the change;
and S3, acquiring the variation duration, and when the duration is within a preset key time range, using the capacitive touch key.
Preferably, the updating the baseline value in step S2 specifically includes:
and acquiring a first count value to an Nth count value of the counter, which are continuous after the current count value, and taking the average value of the first count value to the Nth count value as the baseline value if the difference value between the minimum count value and the maximum count value is less than a preset difference value, wherein N is at least 2.
Preferably, N is 2-100, including endpoints.
Preferably, N is 5, 30 or 90.
Preferably, the step S3 specifically includes:
obtaining the duration time of the variation, and when the duration time is longer than the preset short key time and shorter than the preset long key time, the capacitive touch key is touched for a short time; or,
and when the duration is longer than the preset long key time, the capacitive touch key is touched for a long time.
Preferably, the counter is used for calculating the number of cycles of the relaxation oscillator in a fixed time, and the change amount is a reduction amount.
Preferably, the counter is used to count the total number of system clock cycles during a fixed number of relaxation cycles, and the amount of change is an increment.
Compared with the prior art, the technical scheme provided by the invention has the following advantages:
according to the detection method for the state of the capacitive touch key, provided by the invention, the current count value of the counter is compared with the baseline value, and whether the capacitive touch key is effectively touched or not is judged by analyzing the magnitude of the variation of the current count value relative to the baseline value and the duration time of the variation.
In addition, when the variation of the current count value relative to the baseline value is greater than the baseline variation threshold and smaller than the key response threshold, the baseline value needs to be updated, that is, the baseline variation threshold and the key response threshold are set to reflect that the ambient temperature variation affects the baseline value, and then the baseline value is updated when the ambient temperature varies, so that the influence of the ambient temperature variation on the detection of the state of the capacitive touch key is eliminated, the ambient temperature interference resistance is improved, and the detection precision is improved. Moreover, the baseline value is not a uniformly set value, but changes at any time according to the ambient temperature, so that the influence of process deviation of different chips on the detection of the state of the capacitive touch key is eliminated.
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 flowchart of a method for detecting a state of a capacitive touch key according to an embodiment of the present disclosure.
Detailed Description
As described in the background, the existing capacitive touch key state detection has low accuracy. The inventor researches and discovers that the defect is mainly caused by the fact that the existing capacitive touch key state detection is influenced by environmental change and chip process deviation, so that the detection precision is low.
Specifically, the existing capacitive touch key state detection method includes a method for measuring the frequency of a relaxation oscillator, that is, a standard comparator and some external resistors form a relaxation oscillator which is continuously charged and discharged, and a counter is connected to the output end of the relaxation oscillator to measure the period or the frequency. The counter measures frequency, namely calculates the number of cycles of the relaxation oscillator in fixed time, if the number of cycles measured in the fixed time is less than that of the previous cycles, the charging and discharging frequency of the relaxation oscillator is reduced, and the measured capacitance value is increased, namely the capacitance touch key is touched; the counter measures the period, that is, the total number of system clock periods is calculated in the relaxation period of a fixed number of times, if the capacitive touch key is touched, the capacitance value is increased, the frequency of the relaxation oscillator is reduced, and more system clock periods are measured in the same number of times.
However, in the above method for detecting the state of the capacitive touch key, the charging and discharging time of the capacitor changes with the change of the environment, the frequency of the relaxation oscillator changes, and if the current count value and the previous count value of the counter are not measured in the same environment, the detection of the state of the capacitive touch key is inaccurate.
Based on this, the present invention provides a method for detecting a state of a capacitive touch key, so as to overcome the above problems in the prior art, including:
s1, acquiring the current count value of the counter, judging whether the variation of the current count value compared with the current baseline value is larger than the key response threshold value, if not, entering the step S2; if yes, go to step S3;
s2, judging whether the variation is larger than a baseline variation threshold value, if so, updating the baseline value; if not, ignoring the change;
and S3, acquiring the variation duration, and when the duration is within a preset key time range, using the capacitive touch key.
According to the detection method for the state of the capacitive touch key, provided by the invention, the current count value of the counter is compared with the baseline value, and whether the capacitive touch key is touched or not is judged by analyzing the magnitude of the variation of the current count value relative to the baseline value and the duration time of the variation.
In addition, when the variation of the current count value relative to the baseline value is greater than the baseline variation threshold and smaller than the key response threshold, the baseline value needs to be updated, that is, the baseline variation threshold and the key response threshold are set to reflect that the ambient temperature variation affects the baseline value, and then the baseline value is updated when the ambient temperature varies, so that the influence of the ambient temperature variation on the detection of the state of the capacitive touch key is eliminated, the ambient temperature interference resistance is improved, and the detection precision is improved. Moreover, the baseline value is not a uniformly set value, but changes at any time according to the ambient temperature, so that the influence of process deviation of different chips on the detection of the state of the capacitive touch key is eliminated.
The foregoing is a core idea of the present invention, and in order to make the above objects, features and advantages of the present invention more comprehensible, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described and will be readily apparent to those of ordinary skill in the art without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.
Next, the present invention will be described in detail with reference to the drawings, wherein the cross-sectional views illustrating the structure of the device are not enlarged partially according to the general scale for convenience of illustration when describing the embodiments of the present invention, and the drawings are only examples, which should not limit the scope of the present invention. In addition, the three-dimensional dimensions of length, width and depth should be included in the actual fabrication.
The embodiment of the present application provides a method for detecting a state of a capacitive touch key, which is a flowchart of the method for detecting a state of a capacitive touch key provided in the embodiment of the present application, with reference to fig. 1.
The detection method comprises the following steps:
s1, acquiring the current count value of the counter, judging whether the variation of the current count value compared with the current baseline value is larger than the key response threshold value, if not, entering the step S2; if yes, the process proceeds to step S3.
For the detection method provided by the embodiment of the application, a method of measuring the frequency by using a counter may be adopted, and a method of measuring the period by using a counter may also be adopted. I.e. the counter is used to count the number of cycles of the relaxation oscillator within a fixed time and the amount of change is the amount of decrease. The counter is used to calculate the total number of system clock cycles during a fixed number of relaxation cycles, and the amount of change is an increment. The number of cycles of the relaxation oscillator can be calculated within a fixed time of 50ms, for example by using a counter to measure the frequency.
The current count value of the counter is obtained at any time, the current count value is compared with the baseline value, and when the variation of the current count value compared with the current baseline value is larger than the corresponding threshold of the key, namely the capacitive touch key is touched, but the capacitive touch key is effectively used, and subsequent analysis is needed. It should be noted that the key response threshold needs to be set according to a specific device, which is not specifically limited in the embodiment of the present application.
S2, judging whether the variation is larger than a baseline variation threshold value, if so, updating a baseline value; if not, the change is ignored.
If the current count value changes relative to the current baseline value, and the change amount is smaller than the key response threshold and larger than the baseline change threshold, at this time, the ambient temperature of the capacitive touch device changes, and the change of the ambient temperature affects the relaxation oscillator, so that the baseline value needs to be updated to eliminate the influence of the ambient temperature and avoid affecting the accurate detection of the state of the capacitive touch key.
In addition, for updating the baseline value in the embodiment of the present application, a plurality of count values of the counter are sequentially calculated according to a weighted average method, that is, a plurality of count values arranged in time series are obtained, and an average value of the count values is calculated to obtain the baseline value.
When a plurality of continuous count values are acquired, the environment temperature of the capacitive touch device is kept consistent in a time period of the acquired count values, so that the situation that the environment temperature jumps to influence the count values and finally obtain inaccurate baseline values is avoided. Therefore, it is necessary to perform a comparative analysis on the acquired plurality of count values to eliminate the influence of the ambient temperature.
Specifically, the embodiment of the present application provides a method for updating a baseline value, that is, a first count value to an nth count value of a counter, which are consecutive after a current count value, are obtained, and if a difference value between a minimum count value and a maximum count value is smaller than a preset difference value, an average value of the first count value to the nth count value is taken as the baseline value, where N is at least 2. And if the difference value between the minimum count value and the maximum count value is greater than the preset difference value, the obtained multiple count values are discarded, and the continuous multiple count values are obtained again until the difference value between the minimum count value and the maximum count value is less than the preset difference value. The preferable N of the embodiment of the application is 2-100, including the end points. In particular, N may be 5, 30, 90, or the like.
It should be noted that the preset difference is an allowable difference range between the minimum count value and the maximum count value, that is, the ambient temperature of the capacitive touch device does not jump within the time period.
And S3, acquiring the variation duration, and when the duration is within a preset key time range, using the capacitive touch key.
When the variation of the current count value compared with the baseline value is larger than the key response threshold value, the capacitive touch key is touched, and the duration of the variation is recorded, so as to judge whether the capacitive touch key is mistakenly touched or used.
Specifically, the duration time of the variation is obtained, and when the duration time is longer than a preset short key time and shorter than a preset long key time, the capacitive touch key is touched for a short time; or,
and when the duration is longer than the preset long key time, the capacitive touch key is touched for a long time.
In addition, when the duration time is less than the preset short key time, the capacitive touch key is probably touched by mistake, and the trigger is ignored; alternatively, when the duration is too long, it may be that the capacitive touch key is out of order, or that the operator has an operational error.
The preset short key pressing time may be set to 100ms, the preset long key pressing time may be set to 2s, and the preset failure time in which a failure may occur, which is too long, may be set to 10 s. It should be noted that the setting of the time is not limited to the specific time set above, and may be designed according to the actual application.
In addition, the method for detecting the state of the capacitive touch key provided by the embodiment of the application can be applied to a capacitive touch device with a single capacitive touch key; the method is also applicable to a capacitive touch device with a plurality of capacitive touch keys, and optionally, in the capacitive touch device with a plurality of capacitive touch keys, one capacitive touch key can correspond to one relaxation oscillator and one counter, and the plurality of capacitive touch keys can also correspond to one relaxation oscillator and one counter through a selector.
According to the detection method for the state of the capacitive touch key, whether the capacitive touch key is effectively touched or not is judged by comparing the current count value of the counter with the baseline value and analyzing the magnitude of the variation of the current count value relative to the baseline value and the duration of the variation.
In addition, when the variation of the current count value relative to the baseline value is greater than the baseline variation threshold and smaller than the key response threshold, the baseline value needs to be updated, that is, the baseline variation threshold and the key response threshold are set to reflect that the ambient temperature variation affects the baseline value, and then the baseline value is updated when the ambient temperature varies, so that the influence of the ambient temperature variation on the detection of the state of the capacitive touch key is eliminated, the ambient temperature interference resistance is improved, and the detection precision is improved. Moreover, the baseline value is not a uniformly set value, but changes at any time according to the ambient temperature, so that the influence of process deviation of different chips on the detection of the state of the capacitive touch key is eliminated.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (7)
1. A method for detecting the state of a capacitive touch key is characterized by comprising the following steps:
s1, acquiring the current count value of the counter, judging whether the variation of the current count value compared with the current baseline value is larger than the key response threshold value, if not, entering the step S2; if yes, go to step S3;
s2, judging whether the variation is larger than a baseline variation threshold value, if so, updating the baseline value; if not, ignoring the change;
and S3, acquiring the variation duration, and when the duration is within a preset key time range, using the capacitive touch key.
2. The method for detecting the status of a capacitive touch key according to claim 1, wherein the updating the baseline value in step S2 specifically comprises:
and acquiring a first count value to an Nth count value of the counter, which are continuous after the current count value, and taking the average value of the first count value to the Nth count value as the baseline value if the difference value between the minimum count value and the maximum count value is less than a preset difference value, wherein N is at least 2.
3. The method for detecting the state of the capacitive touch key according to claim 2, wherein N is 2-100, inclusive.
4. The method for detecting the status of a capacitive touch key as claimed in claim 3, wherein N is 5, 30 or 90.
5. The method for detecting the status of a capacitive touch key according to claim 1, wherein the step S3 specifically comprises:
obtaining the duration time of the variation, and when the duration time is longer than the preset short key time and shorter than the preset long key time, the capacitive touch key is touched for a short time; or,
and when the duration is longer than the preset long key time, the capacitive touch key is touched for a long time.
6. The method as claimed in claim 1, wherein the counter is used to count the number of relaxation oscillator cycles in a fixed time, and the variation is a reduction amount.
7. The method of claim 1, wherein the counter is configured to count a total number of system clock cycles during a fixed number of relaxation cycles, and the change is an incremental amount.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105677083A (en) * | 2015-12-30 | 2016-06-15 | 中颖电子股份有限公司 | Method for increasing anti-electromagnetic interference of capacitive touch key |
| CN106293296A (en) * | 2016-08-14 | 2017-01-04 | 广州市趣智智能科技有限公司 | Self adaptation plant touch detecting method |
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| WO2017197574A1 (en) * | 2016-05-17 | 2017-11-23 | 深圳市汇顶科技股份有限公司 | Capacitance detection device |
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| CN113566852A (en) * | 2021-07-13 | 2021-10-29 | 上海艾为电子技术股份有限公司 | Baseline updating method, baseline updating method, relative state detecting system and electronic equipment |
| CN113644905A (en) * | 2021-08-11 | 2021-11-12 | 上海芯跳科技有限公司 | Capacitive touch key detection system |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110221452A1 (en) * | 2010-03-12 | 2011-09-15 | Nuvoton Technology Corporation | Capacitive sensor and sensing method |
| CN102461330A (en) * | 2009-05-05 | 2012-05-16 | 赛普拉斯半导体公司 | Spill-over detection method and system |
| CN102541332A (en) * | 2010-12-30 | 2012-07-04 | 联咏科技股份有限公司 | Click gesture judging method, touch induction control chip, touch system and computer system |
| CN102667690A (en) * | 2009-11-21 | 2012-09-12 | 飞思卡尔半导体公司 | Methods and apparatus for performing capacitive touch sensing and proximity detection |
| CN103023476A (en) * | 2012-11-21 | 2013-04-03 | 中山华帝燃具股份有限公司 | Response method and control system of capacitive sensing type touch key |
-
2014
- 2014-03-20 CN CN201410105118.0A patent/CN104935320A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102461330A (en) * | 2009-05-05 | 2012-05-16 | 赛普拉斯半导体公司 | Spill-over detection method and system |
| CN102667690A (en) * | 2009-11-21 | 2012-09-12 | 飞思卡尔半导体公司 | Methods and apparatus for performing capacitive touch sensing and proximity detection |
| US20110221452A1 (en) * | 2010-03-12 | 2011-09-15 | Nuvoton Technology Corporation | Capacitive sensor and sensing method |
| CN102541332A (en) * | 2010-12-30 | 2012-07-04 | 联咏科技股份有限公司 | Click gesture judging method, touch induction control chip, touch system and computer system |
| CN103023476A (en) * | 2012-11-21 | 2013-04-03 | 中山华帝燃具股份有限公司 | Response method and control system of capacitive sensing type touch key |
Cited By (29)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105677083A (en) * | 2015-12-30 | 2016-06-15 | 中颖电子股份有限公司 | Method for increasing anti-electromagnetic interference of capacitive touch key |
| CN105677083B (en) * | 2015-12-30 | 2018-12-11 | 中颖电子股份有限公司 | A method of improving capacitance type touch key electromagnetism interference performance |
| WO2017197574A1 (en) * | 2016-05-17 | 2017-11-23 | 深圳市汇顶科技股份有限公司 | Capacitance detection device |
| CN108139840A (en) * | 2016-05-17 | 2018-06-08 | 深圳市汇顶科技股份有限公司 | The device of capacitance detecting |
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| CN106293296B (en) * | 2016-08-14 | 2018-11-06 | 广州市趣智智能科技有限公司 | Adaptive plant touch detecting method |
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| CN108512542B (en) * | 2018-03-29 | 2022-02-11 | 上海东软载波微电子有限公司 | Touch key signal processing method and device and computer readable storage medium |
| CN108512542A (en) * | 2018-03-29 | 2018-09-07 | 上海东软载波微电子有限公司 | Touch key-press signal processing method and device, computer readable storage medium |
| CN111198626A (en) * | 2018-11-16 | 2020-05-26 | 珠海格力电器股份有限公司 | Reference value correction method and device for capacitive touch key and storage medium |
| CN111198626B (en) * | 2018-11-16 | 2021-06-11 | 珠海格力电器股份有限公司 | Reference value correction method and device for capacitive touch key and storage medium |
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| CN111404534A (en) * | 2020-03-18 | 2020-07-10 | 北京经纬恒润科技有限公司 | Triggering judgment method and device of capacitive touch switch |
| CN112799545B (en) * | 2021-04-06 | 2021-06-29 | 苏州华芯微电子股份有限公司 | Touch action determination method and device, capacitive touch panel and storage medium |
| CN112799545A (en) * | 2021-04-06 | 2021-05-14 | 苏州华芯微电子股份有限公司 | Touch action determination method and device, capacitive touch panel and storage medium |
| CN113566852A (en) * | 2021-07-13 | 2021-10-29 | 上海艾为电子技术股份有限公司 | Baseline updating method, baseline updating method, relative state detecting system and electronic equipment |
| CN113644905A (en) * | 2021-08-11 | 2021-11-12 | 上海芯跳科技有限公司 | Capacitive touch key detection system |
| CN113644905B (en) * | 2021-08-11 | 2024-01-05 | 上海芯跳科技有限公司 | Capacitive touch key detection system |
| CN114002525A (en) * | 2021-10-28 | 2022-02-01 | 上海艾为电子技术股份有限公司 | Baseline determining circuit and method, state detecting chip and electronic equipment |
| CN118694355A (en) * | 2024-08-27 | 2024-09-24 | 成都启英泰伦科技有限公司 | A multi-channel touch detection system and detection method |
| CN119720128A (en) * | 2025-02-28 | 2025-03-28 | 浙江亿路益传感器有限公司 | A sensitivity optimization method for touch-type capacitive switch and capacitive switch |
| CN119720128B (en) * | 2025-02-28 | 2025-05-13 | 浙江亿路益传感器有限公司 | A sensitivity optimization method for touch-type capacitive switch and capacitive switch |
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Application publication date: 20150923 |