CN106033964B - Button triggers detection device and has its domestic appliance among domestic appliance - Google Patents
Button triggers detection device and has its domestic appliance among domestic appliance Download PDFInfo
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- CN106033964B CN106033964B CN201510115125.3A CN201510115125A CN106033964B CN 106033964 B CN106033964 B CN 106033964B CN 201510115125 A CN201510115125 A CN 201510115125A CN 106033964 B CN106033964 B CN 106033964B
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Abstract
The invention discloses a key trigger detection device in a household appliance and the household appliance with the same, wherein the key trigger detection device in the household appliance comprises: the voltage acquisition module is connected with the keys and used for acquiring the voltage of the keys; the comparison module is connected with the voltage acquisition module and is used for comparing the acquired voltage with a preset voltage to generate a trigger signal; the maintaining module is connected with the comparing module and maintains the trigger signal output by the comparing module; the interrupt generating module is used for generating an interrupt signal according to the trigger signal; the control chip is respectively connected with the maintaining module and the interrupt generating module, and reads the trigger signal maintained by the maintaining module according to the interrupt signal. The invention can generate interruption to the control chip to realize the detection of the optimal action point of the key only when the key is triggered, thereby not only greatly reducing the occupation of the control chip resources, but also maintaining the trigger signal for a certain time to realize the delay jitter elimination.
Description
Technical Field
The invention relates to the technical field of household appliances, in particular to a key triggering detection device in a household appliance and the household appliance.
Background
The adopted methods of the piezoelectric sheet keys, strain gauge keys, coil panel impedance keys, coil panel inductive reactance keys and the like in the market at present are to continuously read the ADC (analog-to-digital conversion) values of the keys, so that not only is the resource of MCU (Micro control unit, Micro control unit/chip) wasted, but also the optimal action point of the keys can be missed.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. Therefore, an object of the present invention is to provide a device for detecting key triggering in a home appliance, which can greatly reduce the occupation of MCU resources and can more accurately detect the optimal operating point of the key.
Another object of the invention is to propose a household appliance.
In order to achieve the above object, a device for detecting key activation in a home appliance according to an embodiment of the present invention includes: the voltage acquisition module is connected with the keys and used for acquiring the voltages of the keys; the comparison module is connected with the voltage acquisition module and is used for comparing the acquired voltage with a preset voltage to generate a trigger signal; the maintaining module is connected with the comparing module and maintains the trigger signal output by the comparing module; the interrupt generating module is used for generating an interrupt signal according to the trigger signal; and the control chip is respectively connected with the maintaining module and the interrupt generating module, and reads the trigger signal maintained by the maintaining module according to the interrupt signal.
According to the key trigger detection device in the household appliance, the voltage of the key is collected through the voltage collection module, the collected voltage is compared with the preset voltage through the comparison module to generate the trigger signal, the trigger signal output by the comparison module is maintained through the maintenance module, and after the interrupt generation module generates the interrupt signal according to the trigger signal, the control chip reads the trigger signal maintained by the maintenance module according to the interrupt signal. The key trigger detection device in the household appliance generates interruption to the control chip to detect the optimal action point of the key only when the key is triggered, so that the occupation of the control chip resource can be greatly reduced, a trigger signal can be maintained for a certain time, and the time delay and jitter elimination are realized.
Specifically, in one embodiment of the present invention, the voltage acquisition module includes: the first end of the first resistor is connected with the key; and the first end of the second resistor is connected with the second end of the first resistor, the second end of the second resistor is grounded, and the first end of the second resistor is used as the output end of the voltage acquisition module.
Specifically, in one embodiment of the present invention, the comparing module includes: the non-inverting input end of the comparator is connected with the output end of the voltage acquisition module, the inverting input end of the comparator is connected with the providing end of the preset voltage, and the output end of the comparator is used as the output end of the comparison module; and a first end of the third resistor is connected with the non-inverting input end of the comparator, and a second end of the third resistor is connected with the output end of the comparator.
Specifically, in one embodiment of the present invention, the maintaining module includes: and the first end of the first capacitor is respectively connected with the output end of the comparison module and the first input end of the control chip, and the second end of the first capacitor is grounded.
Specifically, in one embodiment of the present invention, the interrupt generation module includes: and the first end of the second capacitor is connected with the output end of the comparison module, and the second end of the second capacitor is connected with the second input end of the control chip.
Further, in an embodiment of the present invention, the apparatus for detecting key triggering in a home appliance further includes: the noise elimination module is respectively connected with the voltage acquisition module, a preset voltage providing end and the comparison module, and is used for eliminating noise between the acquired voltage and the preset voltage.
Specifically, in one embodiment of the present invention, the noise cancellation module includes: and the first end of the third capacitor is respectively connected with the output end of the voltage acquisition module and the non-inverting input end of the comparator, and the second end of the third capacitor is respectively connected with the supply end of the preset voltage and the inverting input end of the comparator.
Further, in an embodiment of the present invention, the apparatus for detecting key triggering in a home appliance further includes: and the preset voltage providing module is connected with the comparison module and is used for generating the preset voltage.
Specifically, in one embodiment of the present invention, the preset voltage providing module includes: a first end of the fourth resistor is connected with a power supply; and the cathode of the voltage stabilizing diode is connected with the second end of the fourth resistor, the anode of the voltage stabilizing diode is grounded, and the cathode of the voltage stabilizing diode is used as a providing end of preset voltage.
In order to achieve the above object, a household appliance according to an embodiment of the present invention includes a key and a key trigger detection device in the household appliance.
According to the household appliance provided by the embodiment of the invention, when the key is triggered, the key trigger detection device in the household appliance generates interruption to the control chip to detect the optimal action point of the key, so that the occupation of the control chip resources can be greatly reduced, the trigger signal can be maintained for a certain time, and the delay jitter elimination is realized.
Drawings
Fig. 1 is a block diagram illustrating a key trigger detecting apparatus in a home appliance according to an embodiment of the present invention; and
fig. 2 is a schematic structural diagram of a key triggering detection device in a household appliance according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
The following describes a key trigger detecting apparatus in a home appliance and the home appliance according to an embodiment of the present invention with reference to the drawings.
As shown in fig. 1, a key trigger detecting apparatus 1 in a home appliance according to an embodiment of the present invention includes: the device comprises a voltage acquisition module 11, a comparison module 12, a maintenance module 13, an interrupt generation module 14 and a control chip 15. The voltage acquisition module 11 is connected to the key 2 and configured to acquire a voltage (e.g., a voltage V +) of the key 2. The comparing module 12 is connected to the voltage collecting module 11, and configured to compare the collected voltage with a preset voltage to generate a trigger signal. The maintaining module 13 is connected to the comparing module 12, and the maintaining module 13 maintains the trigger signal output by the comparing module 12. The interrupt generating module 14 is configured to generate an interrupt signal according to the trigger signal. The control chip 15 is connected to the maintaining module 13 and the interrupt generating module 14, respectively, and the control chip 15 reads the trigger signal maintained by the maintaining module 13 according to the interrupt signal.
Specifically, in one embodiment of the present invention, as shown in fig. 2, the voltage collecting module 11 may include a first resistor R1 and a second resistor R2. Wherein, a first end of the first resistor R1 is connected with the key 2. The first end of the second resistor R2 is connected to the second end of the first resistor R1, the second end of the second resistor R2 is grounded, and the first end of the second resistor R2 serves as the output end of the voltage acquisition module 11. The first resistor R1 and the second resistor R2 divide the collected voltage.
Specifically, in one embodiment of the present invention, as shown in fig. 2, the comparing module 12 may include a comparator 121 and a third resistor R3. The non-inverting input terminal of the comparator 121 is connected to the output terminal of the voltage acquisition module 11, the inverting input terminal of the comparator 121 is connected to the providing terminal of the preset voltage, and the output terminal of the comparator 121 serves as the output terminal of the comparison module 12. The first end of the third resistor R3 is connected to the non-inverting input terminal of the comparator 121, the second end of the third resistor R3 is connected to the output terminal of the comparator 121, the third resistor R3 is used as the positive feedback resistor of the comparator 121, and the resistance of the third resistor R3 can be selected according to the time for the sustain module 13 to actually sustain the trigger signal. Further, in an embodiment of the present invention, when the voltage collected by the voltage collecting module 11 is greater than the preset voltage, the output level of the comparator 121 is inverted from a low level to a high level, and the high level is used as the trigger signal. It should be noted that, in an embodiment of the present invention, resistance values of the first resistor R1 and the second resistor R2 in the voltage acquisition module 11 may be changed or the first resistor R1 and the second resistor R2 may be cancelled according to an actual situation, wherein when the first resistor R1 and the second resistor R2 are cancelled, the key 2 is directly connected to the non-inverting input terminal of the comparator 121. In addition, the non-inverting input signal of the comparator 121 can be adjusted by adjusting the resistances of the first resistor R1, the second resistor R2 and the third resistor R3.
Specifically, in an embodiment of the present invention, as shown in fig. 2, the maintaining module 13 may include a first capacitor C1 (e.g., an electrolytic capacitor), a first terminal of the first capacitor C1 is connected to the output terminal of the comparing module 12 and a first input terminal (e.g., a Vout pin) of the control chip 15, respectively, and a second terminal of the first capacitor C1 is connected to ground. Specifically, the first capacitor C1 is discharged, the third resistor R3 and the comparator 121 form a positive feedback to maintain the time of the trigger signal, i.e., the time when the key 2 is triggered, and the resistance of the third resistor R3 and the capacitance of the first capacitor C1 can be selected according to the time when the trigger signal is actually maintained by the maintaining module 13. Specifically, in one embodiment of the present invention, when the voltage at the first input terminal of the control chip 15 is positive, the first capacitor C1 is charged, and when the voltage at the first input terminal of the control chip 15 is 0, the first capacitor C1 is discharged, and the voltage at the first input terminal of the control chip 15 is maintained to be high through the positive feedback of the third resistor R3 until the voltage at the first capacitor C1 is lower than a certain point.
Specifically, in an embodiment of the present invention, as shown in fig. 2, the interrupt generating module 14 may include a second capacitor C2 (e.g., a ceramic chip capacitor), a first terminal of the second capacitor C2 is connected to the output terminal of the comparing module 12, a second terminal of the second capacitor C2 is connected to a second input terminal (e.g., INT pin) of the control chip 15, and a capacitance value of the second capacitor C2 may be selected according to the strength of the actual interrupt signal. Specifically, in one embodiment of the present invention, when the voltage at the first input terminal of the control chip 15 instantaneously turns from 0 to positive, the second input terminal of the control chip 15 will generate a high level in response to the capacitor having the ac-conducting characteristic as the interrupt signal, and when the voltage at the first input terminal of the control chip 15 continues to be the high level, the voltage at the second input terminal of the control chip 15 becomes 0 due to the capacitor having the dc blocking characteristic.
Further, in an embodiment of the present invention, the device 1 for detecting key triggering in a home appliance may further include a noise elimination module 16, the noise elimination module 16 is respectively connected to the voltage acquisition module 11, the providing terminal of the preset voltage, and the comparison module 12, and the noise elimination module 16 is configured to eliminate noise between the acquired voltage and the preset voltage, so as to prevent the comparator 121 from generating false flipping. Specifically, in an embodiment of the present invention, as shown in fig. 2, the noise cancellation module 16 may include a third capacitor C3, a first end of the third capacitor C3 is connected to the output terminal of the voltage acquisition module 11 and the non-inverting input terminal of the comparator 121, respectively, and a second end of the third capacitor C3 is connected to the providing terminal of the preset voltage and the inverting input terminal of the comparator 121, respectively. Specifically, the third capacitor C3 is used as a synchronous capacitor of the comparator 121, and the capacitance value is selected according to the noise signal intensity between the voltage collected by the voltage collecting module 11 and the preset voltage. If the non-inverting input terminal of the comparator 121 has noise, the capacitor has a dc blocking and ac blocking characteristic, so the noise is also applied to the inverting input terminal of the comparator 121, and thus the voltage difference between the non-inverting input terminal and the inverting input terminal of the comparator 121 does not change, and the output level of the comparator 121 does not flip.
Further, in an embodiment of the present invention, the device 1 for detecting key triggering in a home appliance may further include a preset voltage providing module 17, and the preset voltage providing module 17 is connected to the comparing module 12 for generating a preset voltage. Specifically, in one embodiment of the present invention, as shown in fig. 2, the preset voltage providing module 17 may include a fourth resistor R4 and a zener diode D. The first terminal of the fourth resistor R4 is connected to a power supply (e.g., VCC/VDD, which outputs a positive voltage). The cathode of the zener diode D is connected to the second end of the fourth resistor R4, the anode of the zener diode D is grounded, the cathode of the zener diode D serves as a providing end of the preset voltage to provide the preset voltage, the fourth resistor R4 serves as a current limiting resistor of the inverting input end of the comparator 121, and the magnitude of the preset voltage can be adjusted by adjusting the resistance value of the fourth resistor R4 and the voltage stabilizing value of the zener diode D.
According to the key trigger detection device in the household appliance, the voltage of the key is collected through the voltage collection module, the collected voltage is compared with the preset voltage through the comparison module to generate the trigger signal, the trigger signal output by the comparison module is maintained through the maintenance module, and after the interrupt generation module generates the interrupt signal according to the trigger signal, the control chip reads the trigger signal maintained by the maintenance module according to the interrupt signal. The key trigger detection device in the household appliance generates interruption to the control chip to detect the optimal action point of the key only when the key is triggered, so that the occupation of the control chip resource can be greatly reduced, a trigger signal can be maintained for a certain time, and the time delay and jitter elimination are realized.
In order to implement the above embodiments, the present invention further provides a household appliance, which includes a key 2 and the above-mentioned key trigger detection apparatus 1 in the household appliance.
According to the household appliance provided by the embodiment of the invention, when the key is triggered, the key trigger detection device in the household appliance generates interruption to the control chip to detect the optimal action point of the key, so that the occupation of the control chip resources can be greatly reduced, the trigger signal can be maintained for a certain time, and the delay jitter elimination is realized.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and alternate implementations are included within the scope of the preferred embodiment of the present invention in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present invention.
The logic and/or steps represented in the flowcharts or otherwise described herein, e.g., an ordered listing of executable instructions that can be considered to implement logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium could even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via for instance optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.
It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.
In addition, functional units in the embodiments of the present invention may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.
The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc. Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (9)
1. A key trigger detection device in a household appliance is characterized by comprising:
the voltage acquisition module is connected with the keys and used for acquiring the voltages of the keys;
the comparison module is connected with the voltage acquisition module and is used for comparing the acquired voltage with a preset voltage to generate a trigger signal;
the maintaining module is connected with the comparing module and maintains the trigger signal output by the comparing module;
the interrupt generating module is used for generating an interrupt signal according to the trigger signal; and
the control chip is respectively connected with the maintaining module and the interruption generating module, the control chip reads a trigger signal maintained by the maintaining module according to the interruption signal, the control chip comprises a first end and a second end, when the second end of the control chip inputs a high level, the control chip judges that the key is triggered, and the interruption generating module comprises:
and a first end of the second capacitor is connected with the output end of the comparison module, a second end of the second capacitor is connected with a second input end of the control chip, and the interrupt signal is a high-level signal.
2. The key trigger detecting device of claim 1, wherein the voltage collecting module comprises:
the first end of the first resistor is connected with the key; and
and the first end of the second resistor is connected with the second end of the first resistor, the second end of the second resistor is grounded, and the first end of the second resistor is used as the output end of the voltage acquisition module.
3. The apparatus for detecting key actuation in a home appliance according to claim 1, wherein said comparing module comprises:
the non-inverting input end of the comparator is connected with the output end of the voltage acquisition module, the inverting input end of the comparator is connected with the providing end of the preset voltage, and the output end of the comparator is used as the output end of the comparison module; and
and the first end of the third resistor is connected with the non-inverting input end of the comparator, and the second end of the third resistor is connected with the output end of the comparator.
4. The key activation detecting device of claim 1, wherein the maintaining module comprises:
and the first end of the first capacitor is respectively connected with the output end of the comparison module and the first input end of the control chip, and the second end of the first capacitor is grounded.
5. The apparatus for detecting a key actuation in a home appliance according to claim 3, further comprising:
the noise elimination module is respectively connected with the voltage acquisition module, a preset voltage providing end and the comparison module, and is used for eliminating noise between the acquired voltage and the preset voltage.
6. The apparatus for detecting a key actuation in a home appliance according to claim 5, wherein the noise removing module comprises:
and the first end of the third capacitor is respectively connected with the output end of the voltage acquisition module and the non-inverting input end of the comparator, and the second end of the third capacitor is respectively connected with the supply end of the preset voltage and the inverting input end of the comparator.
7. The key activation detecting device in a home appliance according to claim 1, further comprising:
and the preset voltage providing module is connected with the comparison module and is used for generating the preset voltage.
8. The apparatus for detecting key actuation in a home appliance according to claim 7, wherein said preset voltage providing module comprises:
a first end of the fourth resistor is connected with a power supply; and
and the cathode of the voltage stabilizing diode is connected with the second end of the fourth resistor, the anode of the voltage stabilizing diode is grounded, and the cathode of the voltage stabilizing diode is used as a providing end of preset voltage.
9. A household appliance comprising a key and a key activation detection device as claimed in any one of claims 1 to 8 in the household appliance.
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| CN201510115125.3A CN106033964B (en) | 2015-03-16 | 2015-03-16 | Button triggers detection device and has its domestic appliance among domestic appliance |
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| CN201510115125.3A CN106033964B (en) | 2015-03-16 | 2015-03-16 | Button triggers detection device and has its domestic appliance among domestic appliance |
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| CN109118744A (en) * | 2018-11-02 | 2019-01-01 | 成都世纪光合作用科技有限公司 | A kind of Digiplex |
| CN113054984B (en) * | 2021-05-20 | 2021-11-05 | 上海艾为微电子技术有限公司 | Pressure-sensitive detection circuit, chip, system and pressure-sensitive detection method |
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| CN201584957U (en) * | 2009-12-29 | 2010-09-15 | 深圳创维－Rgb电子有限公司 | Touch key circuit, touch control device, touch screen and electronic equipment |
| CN202713260U (en) * | 2012-07-03 | 2013-01-30 | 重庆小康工业集团股份有限公司 | Touch switch |
| CN103312842A (en) * | 2013-05-23 | 2013-09-18 | 惠州Tcl移动通信有限公司 | Terminal and system used for detecting and controlling attachment, and attachment |
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| JP2005332209A (en) * | 2004-05-20 | 2005-12-02 | Rohm Co Ltd | Semiconductor integrated circuit device, and portable equipment using the same |
| CN101499794A (en) * | 2008-01-31 | 2009-08-05 | 杭州利尔达科技有限公司 | Capacitor induction type touch press-key and measuring method for touch press-key capacitor |
| KR102045253B1 (en) * | 2013-09-12 | 2019-11-18 | 삼성전자주식회사 | Method and apparatus for detecting an electro static discharge on an electronic device |
| CN204180043U (en) * | 2014-10-31 | 2015-02-25 | 深圳Tcl数字技术有限公司 | Button Anti-shaking circuit and electronic installation |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201584957U (en) * | 2009-12-29 | 2010-09-15 | 深圳创维－Rgb电子有限公司 | Touch key circuit, touch control device, touch screen and electronic equipment |
| CN202713260U (en) * | 2012-07-03 | 2013-01-30 | 重庆小康工业集团股份有限公司 | Touch switch |
| CN103312842A (en) * | 2013-05-23 | 2013-09-18 | 惠州Tcl移动通信有限公司 | Terminal and system used for detecting and controlling attachment, and attachment |
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