CN117854968B - Membrane switch with early warning function - Google Patents
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- CN117854968B CN117854968B CN202410238796.8A CN202410238796A CN117854968B CN 117854968 B CN117854968 B CN 117854968B CN 202410238796 A CN202410238796 A CN 202410238796A CN 117854968 B CN117854968 B CN 117854968B
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- 239000012528 membrane Substances 0.000 title claims abstract description 34
- 238000012545 processing Methods 0.000 claims abstract description 34
- 230000007246 mechanism Effects 0.000 claims abstract description 25
- 230000005684 electric field Effects 0.000 claims description 51
- 239000004973 liquid crystal related substance Substances 0.000 claims description 30
- 125000006850 spacer group Chemical group 0.000 claims description 23
- 238000011156 evaluation Methods 0.000 claims description 22
- 238000000034 method Methods 0.000 claims description 17
- 230000008569 process Effects 0.000 claims description 13
- 230000002159 abnormal effect Effects 0.000 claims description 6
- 238000012948 formulation analysis Methods 0.000 claims description 3
- 206010063385 Intellectualisation Diseases 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 7
- 230000008859 change Effects 0.000 description 5
- 238000005265 energy consumption Methods 0.000 description 5
- 238000002955 isolation Methods 0.000 description 5
- 230000007613 environmental effect Effects 0.000 description 4
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000005355 Hall effect Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
- H01H13/70—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard
- H01H13/702—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard with contacts carried by or formed from layers in a multilayer structure, e.g. membrane switches
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/16—Indicators for switching condition, e.g. "on" or "off"
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/54—Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere
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- Push-Button Switches (AREA)
Abstract
The invention discloses a membrane switch with an early warning function, and particularly relates to the technical field of membrane switches, which comprises a touch panel, a surface key board, an upper circuit board, a wire key board, a lower circuit board, an LED wire key board, an LED circuit board, a bottom rubber plate and an LED lamp arranged on the LED circuit board, wherein a central processing unit is arranged at the bottom of the touch panel, an alarm module is arranged at the top of the touch panel, and an adjusting mechanism is arranged in the wire key board; the device also comprises a pressure acquisition module and a current acquisition module. According to the invention, through the pressure acquisition module and the current acquisition module, whether the key depression on the touch panel is caused by manual pressing or not can be judged in real time, whether the alarm module performs early warning prompt work or not is controlled according to the judgment result, and the corresponding adjustment work is performed through the adjustment mechanism, so that unnecessary economic loss can be avoided, the intellectualization of the device is improved, and the use value of the device is further improved.
Description
Technical Field
The invention relates to the technical field of membrane switches, in particular to a membrane switch with an early warning function.
Background
The membrane switch is an electronic switch, is usually made of a membrane material, has the characteristics of softness, thinness and light weight, mainly comprises a membrane substrate and a membrane switch layer covered on the membrane switch, the working principle of the membrane switch is to realize the opening and closing of a circuit by changing the conductivity of the membrane switch layer when being pressed or applied with pressure, the membrane switch is widely applied to various electronic devices, such as keyboards, remote controllers, electronic instruments and the like, and is often used for replacing the traditional mechanical switch because the membrane switch has the advantages of long service life, small volume, light weight, easy integration and the like, and in addition, the membrane switch can be designed into a touch sensing type to provide more flexible operation experience, but the traditional membrane switch has some defects in practical use.
The prior art has the following defects: the existing membrane switch is used for a long time, the keys on the touch panel are recessed to a large extent, meanwhile, the influence of a plurality of environmental factors, the influence of relatively strong mechanical vibration and the influence of a plurality of factors can all cause the keys on the touch panel to be recessed to a large extent, the keys on the touch panel can all cause the upper circuit board and the lower circuit board to be in non-artificial contact, further, the device executes a non-artificial work instruction, the device can execute operation without user intention, poor user experience is caused, economic losses of different degrees are caused, and the use value is low.
The above information disclosed in the background section is only for enhancement of understanding of the background of the disclosure and therefore it may include information that does not form the prior art that is already known to a person of ordinary skill in the art.
Disclosure of Invention
In order to overcome the above-mentioned drawbacks of the prior art, an embodiment of the present invention provides a membrane switch with an early warning function to solve the above-mentioned problems in the prior art.
In order to achieve the above purpose, the present invention provides the following technical solutions:
The membrane switch with the early warning function comprises a touch panel, a surface key board, an upper circuit board, a wire key board, a lower circuit board, an LED wire key board, an LED circuit board, a bottom rubber plate and an LED lamp arranged on the LED circuit board, wherein a central processing unit is arranged at the bottom of the touch panel, an alarm module is arranged at the top of the touch panel, and an adjusting mechanism is arranged in the wire key board;
Further comprises:
The pressure acquisition module is arranged at the top of the keypad and used for acquiring the actual pressure of the touch panel on the keypad in real time and generating a pressure stability coefficient through the central processing unit;
The current acquisition module is arranged at one side of the upper circuit board and the lower circuit board, and is used for acquiring the actual current when a passage is formed between the upper circuit board and the lower circuit board in real time, and generating a current waveform factor coefficient through the central processing unit;
The central processing unit is used for comprehensively analyzing the generated pressure stability coefficient and current waveform factor coefficient to generate an evaluation coefficient, comparing the evaluation coefficient with a preset evaluation coefficient reference threshold value, judging whether the key depression on the touch panel is caused by manual pressing or not, and controlling the working states of the alarm module and the adjusting mechanism according to the comparison result.
Preferably, the adjusting mechanism comprises an electric field controller, an electrode and a liquid crystal isolation sheet, one side of the electric field controller is fixedly connected with one side of the electrode, one side of the electrode is fixedly connected with one side of the liquid crystal isolation sheet, the outer wall of the electrode is movably connected with the inner wall of the line key board, and the electric field controller and the electrode are used for changing the electric field where the liquid crystal isolation sheet is located.
Preferably, the output end of the central processing unit is electrically connected with the input end of the panel, the input end of the upper circuit board, the input end of the wire keyboard, the input end of the lower circuit board, the input end of the LED wire keyboard, the input end of the LED circuit board, the input end of the alarm module and the input end of the electric field controller respectively, and the input end and the output end of the pressure acquisition module and the input end and the output end of the current acquisition module are electrically connected with the output end and the input end of the central processing unit respectively.
Preferably, the logic for obtaining the pressure stability factor is:
s1, acquiring actual pressures of the touch panel opposite-surface key plate at different times in T time through a pressure acquisition module, and calibrating the actual pressures of the touch panel opposite-surface key plate at different times in T time as ，A number indicating the actual pressure of the touch panel against the keypad at different times during time T,，Is a positive integer;
s2, calculating a pressure stability coefficient, wherein the calculated expression is as follows:
In which, in the process, Is the pressure stability factor.
Preferably, the logic for obtaining the current form factor coefficient is:
s1, acquiring actual currents in the T time when the upper circuit board and the lower circuit board form a passage at different moments through a current acquisition module, and calibrating the actual currents in the T time when the upper circuit board and the lower circuit board form the passage at different moments as ，A number indicating the actual current when a path is formed between the upper wiring board and the lower wiring board at different times in the T time,，Is a positive integer;
S2, establishing a set of actual currents when a path is formed between the upper circuit board and the lower circuit board at different moments in the T time, and calibrating the set as ThenWill be assembledThe maximum value in is calibrated as；
S3, calculating a current waveform factor coefficient, wherein the calculated expression is as follows:
In which, in the process, Is the current form factor.
Preferably, the expression formula of the evaluation coefficient is:
Carrying out formulation analysis by the central processing unit, and according to the formula:
; in the method, in the process of the invention, In order to evaluate the coefficients of the coefficients,AndPreset proportional coefficients of pressure stability coefficient and current waveform factor coefficient respectively, andAndAre all greater than 0.
Preferably, the preset evaluation coefficient reference threshold value is set to beWhereinThe calculated evaluation coefficient is processed by the CPUAnd a preset evaluation coefficient reference threshold valueComparing, judging whether the key depression on the touch panel is caused by manual pressing, and controlling the working states of the alarm module and the adjusting mechanism according to the comparison result, wherein the specific judgment is as follows:
When (when) When the key depression on the touch panel is not caused by manual pressing, an abnormal signal is generated, after the central processing unit receives the abnormal signal, an early warning signal and a first adjustment signal are generated, the generated early warning signal and the first adjustment signal are respectively transmitted to the alarm module and the electric field controller, the alarm module receives the early warning signal and then performs early warning prompt work, and after the electric field controller receives the first adjustment signal, the electric field controller controls the adjustment mechanism to perform first adjustment work;
When (when) When the touch panel is pressed by people, a normal signal is generated, the central processing unit receives the normal signal, then generates a standby signal and a second adjustment signal, the generated standby signal and the second adjustment signal are respectively transmitted to the alarm module and the electric field controller, the alarm module does not perform early warning prompt work after receiving the standby signal, and the electric field controller controls the adjustment mechanism to perform second adjustment work after receiving the second adjustment signal.
The invention has the technical effects and advantages that:
1. According to the invention, the actual pressure of the touch panel on the keypad and the actual current when a channel is formed between the upper circuit board and the lower circuit board can be obtained in real time through the pressure acquisition module and the current acquisition module, the central processing unit is used for carrying out comprehensive analysis, judging whether the key depression on the touch panel is caused by artificial pressing, and controlling the alarm module to carry out early warning prompt work according to the judging result, namely reminding a worker whether an artificial instruction signal appears at the moment, so as to remind the worker to overhaul the device in time, thereby improving the intellectualization of the device and further improving the use value of the device.
2. According to the invention, under the condition that the key depression on the touch panel is not caused by manual pressing, the central processing unit can timely control the adjusting mechanism to timely adjust the operation through the electric field controller, and the electric field in which the liquid crystal isolation sheet is positioned is changed through the electric field controller and the electrodes, so that the liquid crystal isolation sheet is switched to a non-conductive state, the device is prevented from executing a non-manual working instruction, the current flowing in the depression can be prevented, potential electrical problems are reduced, the stability and the reliability of the device are ensured, the energy consumption of the device is reduced, the current passage is maintained and the energy consumption may not be necessary under the condition that the depression is not caused by manual pressing, the energy consumption can be reduced by cutting off the current passage, and the energy efficiency of the device is improved.
Drawings
For the convenience of those skilled in the art, the present invention will be further described with reference to the accompanying drawings;
fig. 1 is a schematic perspective view of a membrane switch with early warning function according to the present invention;
fig. 2 is a schematic diagram of the internal structure of a membrane switch with early warning function according to the present invention;
FIG. 3 is a schematic diagram of the mounting structure of a pressure acquisition module and a keypad of a membrane switch with an early warning function according to the present invention;
fig. 4 is a schematic diagram of the top structure of an upper circuit board of a membrane switch with an early warning function according to the present invention;
FIG. 5 is a schematic diagram showing the installation structure of a key board and an adjusting mechanism of a membrane switch with an early warning function;
Fig. 6 is a schematic diagram of a lower circuit board structure of a membrane switch with early warning function according to the present invention;
Fig. 7 is a schematic diagram of an LED circuit board and an LED lamp mounting structure of a membrane switch with an early warning function according to the present invention;
fig. 8 is a schematic diagram of a membrane switch with early warning function according to the present invention.
In the figure: 1. a touch panel; 2. a key sheet; 3. an upper circuit board; 4. a wire key plate; 5. a lower wiring board; 6. an LED keypad; 7. an LED circuit board; 8. a base rubber plate; 9. a central processing unit; 10. an alarm module; 11. an LED lamp; 12. an adjusting mechanism; 1201. an electric field controller; 1202. an electrode; 1203. a liquid crystal spacer; 13. a pressure acquisition module; 14. and the current acquisition module.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Examples: as shown in fig. 1-8, a membrane switch with an early warning function comprises a touch panel 1, a panel board 2, an upper circuit board 3, a line board 4, a lower circuit board 5, an LED line board 6, an LED circuit board 7, a primer plate 8 and an LED lamp 11 arranged on the LED circuit board 7, wherein a central processing unit 9 is arranged at the bottom of the touch panel 1, an alarm module 10 is arranged at the top of the touch panel 1, and an adjusting mechanism 12 is arranged in the line board 4;
Further comprises:
The pressure acquisition module 13 is arranged at the top of the keypad 2 and is used for acquiring the actual pressure of the touch panel 1 on the keypad 2 in real time and generating a pressure stability coefficient through the central processing unit 9;
it should be noted that, the pressure collecting module 13 may be a piezoresistor sensor or other devices capable of acquiring the actual pressure of the touch panel 1 on the keypad 2 in real time, and the pressure collecting module 13 is not limited herein specifically and may be selected according to the actual requirement;
The current acquisition module 14 is arranged at one side of the upper circuit board 3 and the lower circuit board 5, and is used for acquiring the actual current when a passage is formed between the upper circuit board 3 and the lower circuit board 5 in real time, and generating a current waveform factor coefficient through the central processing unit 9;
it should be noted that, the current collection module 14 may be a hall effect sensor or other devices capable of obtaining an actual current when a path is formed between the upper circuit board 3 and the lower circuit board 5 in real time, and the current collection module 14 is not specifically limited herein and may be selected according to actual requirements;
Comprehensively analyzing the generated pressure stability coefficient and current waveform factor coefficient by the central processing unit 9 to generate an evaluation coefficient, comparing the evaluation coefficient with a preset evaluation coefficient reference threshold value to judge whether the key depression on the touch panel 1 is caused by manual pressing or not, and controlling the working states of the alarm module 10 and the adjusting mechanism 12 according to the comparison result;
it should be noted that, the alarm module 10 is mainly used for reminding a worker whether the depression of the key on the touch panel 1 is caused by manual pressing, and may be a buzzer or other devices capable of reminding the worker that the depression of the key on the touch panel 1 is caused by manual pressing, and the alarm module 10 is not specifically limited herein and may be selected according to actual requirements.
In this embodiment, the adjusting mechanism 12 includes an electric field controller 1201, an electrode 1202 and a liquid crystal spacer 1203, wherein one side of the electric field controller 1201 is fixedly connected with one side of the electrode 1202, one side of the electrode 1202 is fixedly connected with one side of the liquid crystal spacer 1203, the outer wall of the electrode 1202 is movably connected with the inner side wall of the keypad 4, and the electric field controller 1201 and the electrode 1202 are used for changing the electric field where the liquid crystal spacer 1203 is located;
It should be noted that, when the electric field controller 1201 and the electrode 1202 are used to change the electric field in which the liquid crystal spacer 1203 is located, that is, the central processor 9 outputs the first adjustment signal or the second adjustment signal to the electric field controller 1201, where the first adjustment signal and the second adjustment signal may be a voltage signal, whose frequency, amplitude and polarity may be adjusted according to needs, and not specifically limited herein, after the electric field controller 1201 receives the signal, the electric field in which the liquid crystal spacer 1203 is located is adjusted by the electrode 1202, and when the electric field is applied to the liquid crystal spacer 1203, the arrangement state of the liquid crystal molecules in the liquid crystal spacer 1203 is changed, so that the conductivity thereof is adjusted, and by applying or removing the electric field in different periods, the central processor 9 may control the switching of the liquid crystal spacer 1203 between the conductive state and the nonconductive state by the electric field controller 1201 and the electrode 1202, such a switching process may be implemented to form a path when the needs, and switch to the insulating state when the insulating state is not needs, so as to prevent the formation of a current path between the upper circuit board 3 and the lower circuit board 5.
In this embodiment, the output end of the central processing unit 9 is electrically connected with the input end of the panel board 2, the input end of the upper circuit board 3, the input end of the keypad board 4, the input end of the lower circuit board 5, the input end of the LED keypad board 6, the input end of the LED circuit board 7, the input end of the alarm module 10 and the input end of the electric field controller 1201, and the input end and the output end of the pressure acquisition module 13 and the input end and the output end of the current acquisition module 14 are electrically connected with the output end and the input end of the central processing unit 9, respectively;
It should be noted that, the electrical connection refers to a process of transmitting a current from one part of an electronic device or a circuit to another part through conductive materials or conductive elements, and the connection is a key component of operation of the electronic device or the circuit, which ensures effective transmission and connection of an electronic current in the electronic device, and the electrical connection may be performed by using wires, and a manner of electrical connection between the central processing unit 9 and the keypad 2, the upper circuit board 3, the keypad 4, the lower circuit board 5, the LED keypad 6, the LED circuit board 7, the alarm module 10, the electric field controller 1201, the pressure acquisition module 13, and the current acquisition module 14 is not specifically limited, and may be selected according to actual needs.
Because membrane switch in the in-service use, because the use of the button on touch panel 1 for a long time can cause the sunken of button, and then can lead to the contact to take place between upper circuit board 3 and the lower circuit board 5, can cause the device to carry out the operation under the condition that does not have the user's intention, lead to bad user experience, in addition, the contact that does not need still can cause electrical problem, if short circuit, can also lead to the system to break normal current path, thereby lead to system failure, can also lead to the circulation of electric current in the system, thereby produce extra consumption and generate heat, this can lead to equipment efficiency decline, also can produce certain influence to the life-span of electronic component simultaneously, also can lead to equipment to overheated, increase the conflagration risk, perhaps lead to the electric shock danger under certain circumstances, and receive environmental factor such as high temperature for a long time, moisture, chemical corrosion etc. influence can lead to ageing and the deformation of material, and then cause the button sunken etc. can all lead to the button sunken, and so on touch panel 1 can lead to the fact a great deal of influence, and then lead to the fact a large number of influence to the fact the button is sunken, and thus can cause the fact on the demand on the touch panel, and the touch panel is difficult to be touched down, therefore, the demand is that is 3 is down on the touch panel is not touched down in order to the line is in time, and is avoided, the demand is that is adjusted to the touch panel is down on the fact on the line is promptly is down, and is down on the fact on the touch panel is 3.
In this embodiment, the pressure stability factor refers to the degree of pressure stability of the touch panel 1 against the keypad 2 during the time T, and if the pressure stability factor is smaller, it indicates that the degree of pressure stability of the touch panel 1 against the keypad 2 during the time T is higher, and if the pressure stability factor is larger, it indicates that the degree of pressure stability of the touch panel 1 against the keypad 2 during the time T is lower;
It should be noted that if the key depression on the touch panel 1 is caused by manual pressing, a relatively stable pressure signal will be generated during a certain period of time due to the relatively regular and periodic pressure change, because the user generally uses the device in a relatively consistent manner, the key depression caused by the manual pressing will often show a relatively low pressure stability coefficient, whereas if the key depression on the touch panel 1 is caused by non-human factors such as environmental factors, material aging or mechanical vibration, the pressure signal change may be more irregular, resulting in a higher pressure stability coefficient;
The logic for obtaining the pressure stability coefficient is as follows:
s1, acquiring actual pressures of the touch panel 1 to the keypad 2 at different times in T time through a pressure acquisition module 13, and calibrating the actual pressures of the touch panel 1 to the keypad 2 at different times in T time as follows ，A number indicating the actual pressure of the keypad 2 by the touch panel 1 at different times during time T,，Is a positive integer;
s2, calculating a pressure stability coefficient, wherein the calculated expression is as follows:
In which, in the process, Is the pressure stability factor.
In this embodiment, the current waveform factor refers to the fluctuation of the actual current when the upper circuit board 3 and the lower circuit board 5 form a path in the T time, if the current waveform factor is larger, the fluctuation of the actual current when the upper circuit board 3 and the lower circuit board 5 form a path in the T time is larger, and if the current waveform factor is smaller, the fluctuation of the actual current when the upper circuit board 3 and the lower circuit board 5 form a path in the T time is smaller;
It should be noted that, since artificial pressing may cause a transient change in the current signal, particularly at the moment when pressing starts and ends, the peak current is relatively large, and thus the waveform factor may be large, the panel's own recess usually causes a relatively stable current change, and the peak current may not protrude too much with respect to the overall fluctuation of the signal, and thus the waveform factor may be small;
The acquisition logic of the current waveform factor coefficient is as follows:
S1, acquiring actual currents in the T time when the upper circuit board 3 and the lower circuit board 5 form a passage at different moments through the current acquisition module 14, and calibrating the actual currents in the T time when the upper circuit board 3 and the lower circuit board 5 form the passage at different moments as ，A number indicating the actual current when a path is formed between the upper wiring board 3 and the lower wiring board 5 at different times in the T time,，Is a positive integer;
S2, establishing a set of actual currents when forming a path between the upper circuit board 3 and the lower circuit board 5 at different moments in time T, and calibrating the set as ThenWill be assembledThe maximum value in is calibrated as；
S3, calculating a current waveform factor coefficient, wherein the calculated expression is as follows:
In which, in the process, Is the current form factor.
In this embodiment, the expression formula of the evaluation coefficient is:
Will be AndAfter dimensionless processing, the cpu 9 performs formulation analysis, according to the formula:
; in the method, in the process of the invention, In order to evaluate the coefficients of the coefficients,AndPreset proportional coefficients of pressure stability coefficient and current waveform factor coefficient respectively, andAndAre all greater than 0;
from the calculated expression, the pressure stability factor And current form factorAll the smaller, the evaluation coefficientThe smaller the size;
it should be noted that dimensionless is a process of expressing a physical quantity in a dimensionless form, and in this way, the influence of units on physical problems can be eliminated, so that the problems are more concise and universal; preset proportional coefficient of pressure stability coefficient and current waveform factor coefficient AndThe system is used for flexibly adapting to different working conditions and environmental changes in actual monitoring, and the deviation coefficients can be adjusted according to specific conditions so as to improve the performance and applicability of the monitoring system.
In the present embodiment, the preset evaluation coefficient reference threshold value is set toWhereinThe calculated evaluation coefficient is processed by the CPU 9And a preset evaluation coefficient reference threshold valueThe comparison is performed to determine whether the depression of the key on the touch panel 1 is caused by manual pressing, and the working states of the alarm module 10 and the adjusting mechanism 12 are controlled according to the comparison result, which is specifically determined as follows:
When (when) When the key depression on the touch panel 1 is not caused by manual pressing, an abnormal signal is generated at the moment, after the central processing unit 9 receives the abnormal signal, an early warning signal and a first adjustment signal are generated, the generated early warning signal and the first adjustment signal are respectively transmitted to the warning module 10 and the electric field controller 1201, the warning module 10 receives the early warning signal and then performs early warning prompt work, and after the electric field controller 1201 receives the first adjustment signal, the adjustment mechanism 12 is controlled to perform first adjustment work;
The first adjustment operation means: after the electric field controller 1201 in the adjusting mechanism 12 receives the first adjusting signal, the electric field in which the liquid crystal spacer 1203 is located is adjusted by the electrode 1202, that is, the electric field in which the liquid crystal spacer 1203 is located is adjusted to a state in which the liquid crystal spacer 1203 can become non-conductive, that is, the liquid crystal spacer 1203 is switched to a non-conductive state, in this way, in the case that the depression of the key on the touch panel 1 is not caused by manual pressing, the contact between the upper circuit board 3 and the lower circuit board 5 also cannot form a state of a path, that is, the circuit is broken, so as to prevent the device from executing an economic loss caused by a non-manual instruction, effectively prevent the formation of an unnecessary current path caused by a non-manual instruction, and in this way, by setting the liquid crystal spacer 1203 to a non-conductive state, prevent the device from executing a non-manual operation instruction, avoid the current from flowing in the depression, reduce potential electrical problems, ensure the stability and reliability of the device, in the case that the depression is not caused by manual pressing, maintain the current path and consume energy, possibly be unnecessary, and by cutting off the path, the path is not caused by manual pressing, the energy consumption of the device is reduced, and the energy consumption is possible.
The early warning prompt work refers to: after the alarm module 10 receives the early warning signal, the key depression on the touch panel 1 of the staff is reminded not to be caused by artificial pressing, namely, the staff is reminded of not being reminded of the artificial instruction signal at the moment, and the staff is reminded of overhauling the device;
When (when) When the key depression on the touch panel 1 is caused by manual pressing, a normal signal is generated at the moment, after the central processing unit 9 receives the normal signal, a standby signal and a second adjustment signal are generated, the generated standby signal and the second adjustment signal are respectively transmitted to the alarm module 10 and the electric field controller 1201, after the alarm module 10 receives the standby signal, early warning prompt work is not performed, and after the electric field controller 1201 receives the second adjustment signal, the adjustment mechanism 12 is controlled to perform second adjustment work;
The second adjustment operation means: after the electric field controller 1201 in the adjusting mechanism 12 receives the second adjusting signal, the electric field where the liquid crystal spacer 1203 is located is adjusted through the electrode 1202, that is, the electric field where the liquid crystal spacer 1203 is located is adjusted to be in a state that the liquid crystal spacer 1203 can be changed into a conductive state, that is, the liquid crystal spacer 1203 is switched to a conductive state, in this way, under the condition that the key depression on the touch panel 1 is caused by manual pressing, the contact between the upper circuit board 3 and the lower circuit board 5 can be ensured to form a passage, the normal operation of the device can be ensured, and the flexibility and the controllability of the device are improved;
It should be noted that, the electric field controller 1201 can regulate the formed electric field by adjusting the potential difference between the electrodes 1202, and can affect the arrangement state of the liquid crystal molecules in the liquid crystal spacer 1203 by changing the intensity or direction of the electric field, so as to realize the switching of the conductive or nonconductive state of the liquid crystal spacer 1203.
The above formulas are all formulas with dimensions removed and numerical values calculated, the formulas are formulas with a large amount of data collected for software simulation to obtain the latest real situation, and preset parameters in the formulas are set by those skilled in the art according to the actual situation.
It should be understood that, in various embodiments of the present application, the sequence numbers of the foregoing processes do not mean the order of execution, and the order of execution of the processes should be determined by the functions and internal logic thereof, and should not constitute any limitation on the implementation process of the embodiments of the present application.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
In the several embodiments provided by the present application, it should be understood that the disclosed general system, apparatus, and method may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the units is merely a logical functional division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another overall system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.
The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in the embodiments of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit.
The foregoing is merely illustrative of the present application, and the present application is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (4)
1. The utility model provides a membrane switch with early warning function, includes touch panel (1), face keypad (2), goes up circuit board (3), keypad (4), lower circuit board (5), LED keypad (6), LED circuit board (7), primer board (8) and sets up LED lamp (11) on LED circuit board (7), its characterized in that: the bottom of the touch panel (1) is provided with a central processing unit (9), the top of the touch panel (1) is provided with an alarm module (10), and an adjusting mechanism (12) is arranged in the keypad (4);
Further comprises:
the pressure acquisition module (13) is arranged at the top of the keypad (2) and is used for acquiring the actual pressure of the touch panel (1) on the keypad (2) in real time and generating a pressure stability coefficient through the central processing unit (9);
The logic for acquiring the pressure stability coefficient is as follows:
S1, acquiring actual pressures of the touch panel (1) and the keypad (2) at different times in T time through a pressure acquisition module (13), and calibrating the actual pressures of the touch panel (1) and the keypad (2) at different times in T time as ，/>Number indicating actual pressure of touch panel (1) against keypad (2) at different times in T time,/>，Is a positive integer;
s2, calculating a pressure stability coefficient, wherein the calculated expression is as follows:
In the above, the ratio of/> Is the pressure stability coefficient;
The current acquisition module (14) is arranged at one side of the upper circuit board (3) and the lower circuit board (5) and is used for acquiring the actual current when a passage is formed between the upper circuit board (3) and the lower circuit board (5) in real time and generating a current waveform factor coefficient through the central processing unit (9);
The acquisition logic of the current waveform factor coefficient is as follows:
S1, acquiring actual currents in forming a passage between an upper circuit board (3) and a lower circuit board (5) at different moments in T time through a current acquisition module (14), and calibrating the actual currents in forming the passage between the upper circuit board (3) and the lower circuit board (5) at different moments in T time as ，/>Number indicating actual current when forming a path between the upper wiring board (3) and the lower wiring board (5) at different times within T time,/>，/>Is a positive integer;
S2, establishing a set of actual currents when a path is formed between the upper circuit board (3) and the lower circuit board (5) at different moments in time T, and calibrating the set as Then/>Will gather/>The maximum value in is calibrated as/>；
S3, calculating a current waveform factor coefficient, wherein the calculated expression is as follows:
In the above, the ratio of/> Is the current waveform factor;
comprehensively analyzing the generated pressure stability coefficient and current waveform factor coefficient by a central processing unit (9), generating an evaluation coefficient, comparing the evaluation coefficient with a preset evaluation coefficient reference threshold value, judging whether key depression on the touch panel (1) is caused by manual pressing or not, and controlling the working states of the alarm module (10) and the adjusting mechanism (12) according to the comparison result;
The expression formula of the evaluation coefficient is as follows:
And (3) carrying out formulation analysis by a central processing unit (9), and according to the formula:
；
in the method, in the process of the invention, To evaluate the coefficient,/>And/>Preset proportional coefficients of pressure stability coefficient and current waveform factor coefficient respectively, and/>And/>Are all greater than 0.
2. The membrane switch with early warning function according to claim 1, characterized in that: the adjusting mechanism (12) comprises an electric field controller (1201), an electrode (1202) and a liquid crystal spacer (1203), one side of the electric field controller (1201) is fixedly connected with one side of the electrode (1202), one side of the electrode (1202) is fixedly connected with one side of the liquid crystal spacer (1203), the outer wall of the electrode (1202) is movably connected with the inner side wall of the keypad (4), and the electric field controller (1201) and the electrode (1202) are used for changing an electric field where the liquid crystal spacer (1203) is located.
3. The membrane switch with early warning function according to claim 2, characterized in that: the output end of the central processing unit (9) is electrically connected with the input end of the panel (2), the input end of the upper circuit board (3), the input end of the line board (4), the input end of the lower circuit board (5), the input end of the LED line board (6), the input end of the LED circuit board (7), the input end of the alarm module (10) and the input end of the electric field controller (1201) respectively, and the input end and the output end of the pressure acquisition module (13) and the input end and the output end of the current acquisition module (14) are electrically connected with the output end and the input end of the central processing unit (9) respectively.
4. A membrane switch with early warning function according to claim 3, characterized in that the preset evaluation coefficient reference threshold is set asWherein/>The calculated evaluation coefficient/>, is processed by a central processing unit (9)And a preset evaluation coefficient reference threshold/>The key depression on the touch panel (1) is judged whether to be caused by manual pressing or not by comparison, and the working states of the alarm module (10) and the adjusting mechanism (12) are controlled according to the comparison result, and the specific judgment is as follows:
When (when) When the key depression on the touch panel (1) is not caused by manual pressing, an abnormal signal is generated, after the central processing unit (9) receives the abnormal signal, an early warning signal and a first adjustment signal are generated, the generated early warning signal and the first adjustment signal are respectively transmitted to the warning module (10) and the electric field controller (1201), the warning module (10) receives the early warning signal and then performs early warning prompt work, and after the electric field controller (1201) receives the first adjustment signal, the electric field controller controls the adjustment mechanism (12) to perform first adjustment work;
When (when) When the touch panel (1) is pressed by people, a normal signal is generated, the central processing unit (9) receives the normal signal, then generates a standby signal and a second adjustment signal, the generated standby signal and the second adjustment signal are respectively transmitted to the alarm module (10) and the electric field controller (1201), the alarm module (10) does not perform early warning prompt work after receiving the standby signal, and the electric field controller (1201) controls the adjustment mechanism (12) to perform second adjustment work after receiving the second adjustment signal.
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| CN202410238796.8A CN117854968B (en) | 2024-03-04 | 2024-03-04 | Membrane switch with early warning function |
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| CN117854968A (en) | 2024-04-09 |
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