CN213547486U

CN213547486U - One-key dialing electronic system constructed based on capacitive touch keys

Info

Publication number: CN213547486U
Application number: CN202022508023.7U
Authority: CN
Inventors: 胡启锋
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-11-03
Filing date: 2020-11-03
Publication date: 2021-06-25
Anticipated expiration: 2030-11-03

Abstract

The utility model discloses a key dialing system based on electric capacity touch button founds, its characterized in that: the system comprises a capacitive touch key input unit, a microcontroller processing unit and a wireless communication functional unit. The capacitive touch key is realized by matching a small copper-clad area on the printed circuit board with an external charging resistor, and the microcontroller judges whether touch occurs or not by detecting the charging and discharging time of the capacitor at the corresponding port; the microcontroller processing unit mainly comprises a microcontroller, a memory chip, a clock circuit and a reset circuit; the wireless communication functional unit mainly comprises a GSM/GPRS/3G/4G communication module matched with an external antenna/PCB antenna/FPC antenna; the utility model has the characteristics of simple structure, low cost, long service life, signal interference immunity is strong etc.

Description

One-key dialing electronic system constructed based on capacitive touch keys

Technical Field

The utility model relates to a key dialing system, concretely relates to key dialing electronic system based on electric capacity touch button founds.

Background

With the development of science and technology, the mobile phone which is a main communication tool of modern people is not limited to a simple communication function for a long time, and with the more advanced functions, the smart phone almost covers the aspects of daily work, learning, social contact, entertainment and life of people, and high-tech products such as the smart phone and the like bring other problems while providing more options for the life of people, such as safety, electromagnetic radiation, complex operation and the like. The contradiction is more prominent with the coming of the aging society of China, mainly because the high-tech products used in daily life, no matter intelligent hardware or software, are mainly designed around the use requirements of young people, and the user experience of the old people is rarely considered and optimized. It can be said that the old people still are the "vulnerable group" in the daily science and technology product, they obviously do not adapt to the update development rhythm of mainstream intelligent communication equipment at present very much, the old people are eager for some function to appear and are single, easy operation's intelligent equipment can really bring convenience for their life, under such trend, new concepts such as old man's machine and one key dialing also should be brought into production, however, the one key dialing of mainstream in the market at present is all realized by the simulation button on mechanical button or the touch-sensitive screen, these two kinds of traditional buttons have following shortcoming:

1. the traditional mechanical key is large in size, limited in service life and easy to oxidize when meeting water.

2. The simulation keys on the touch screen cannot be expanded in a large quantity, and the positions of the simulation keys are not fixed, so that the simulation keys are inconvenient to find.

SUMMERY OF THE UTILITY MODEL

The utility model provides a problem provide a key dialing electronic system based on electric capacity touch button founds, its structure is succinct, unlimited life-span, and the signal stability, the interference killing feature is strong. In order to solve the above problem, the utility model has the main characteristics that touch the button by electric capacity triggers a key dialing system, its characterized in that: the system comprises a capacitive touch key input unit, a microcontroller processing unit and a wireless communication functional unit.

Further, the utility model discloses an electric capacity touch button covers charging resistor of regional collocation of copper by a fritter on the printed circuit board and realizes, and each fritter covers the copper region and links to each other with an external charging resistor and constitutes an electric capacity touch button, and charging resistor's the other end connects to the anodal VCC of power.

Further, the microcontroller processing unit comprises a microcontroller, a memory chip, a storage chip, a clock circuit, a reset circuit and the like, wherein the microcontroller adopts an STM32F407 series chip in the meaning and is packaged into LQFP 144.

Furthermore, the wireless communication functional unit mainly comprises a GSM/GPRS/3G/4G wireless communication module matched with an external antenna/PCB antenna/FPC antenna, for example, a SIM800C communication module of SIMCom is selected for GPRS communication, wherein a pin 9 and a pin 10 of the SIM800C are respectively connected with the input of an MIC or a microphone, and the output of a pin 11 and a pin 12 of the SIM800C are connected to a loudspeaker or an earphone; the transceiver antenna is bridged between pin 32 of SIM800C and signal Ground (GND).

Compared with the prior art, the utility model, have following advantage and effect:

1. the utility model discloses a capacitanc touch button refers in particular to a fritter copper-clad area on the printed circuit board, and this button has waterproof, characteristics that dampproofing and interference killing feature are strong.

2. The utility model discloses a capacitanc touch button refers in particular to a fritter on the printed circuit board and covers the copper region, and this button does not have any mechanical parts, can not wear and tear, and unlimited life-span has significantly reduced the later maintenance cost.

3. The utility model discloses a capacitanc touch button is referred in particular to a fritter copper-clad region on the printed circuit board, because the copper-clad surface scribbles green oil, consequently can try the arbitrary collocation of various patterns, character, makes its appearance more fashion, indeformable. Fundamentally has solved the effect that traditional mechanical button can't reach.

Drawings

Fig. 1 is a system block diagram of the present invention.

Fig. 2 is a circuit schematic diagram of the capacitive touch key input unit.

Fig. 3 is a circuit diagram of a wireless communication functional unit.

Detailed Description

The present invention will be described in further detail below by way of examples with reference to the accompanying drawings, which are illustrative of the present invention and are not to be construed as limited to the following examples. As shown in fig. 1 the utility model relates to a key dialing system based on electric capacity touch button founds, this system contain electric capacity touch button input unit, microcontroller processing unit, wireless communication functional unit, and wherein electric capacity touch button covers copper regional collocation charging resistor by a fingertip size on the printed circuit board and constitutes. As shown in fig. 2, a four-channel capacitive touch key input detection system, first pull up a small copper-clad area on a PCB to VCC through a 1M ohm resistor, then connect the other end of the copper-clad area to a detection IO port of a microcontroller, the microcontroller determines whether a touch event occurs by detecting a change in capacitance charging time on the IO port, when the detection starts, the IO port is configured as push-pull output, the stray capacitance is completely discharged, then the IO port is set as floating input, the capacitance is charged by an external charging resistor, simultaneously, an input capture function of the corresponding IO port is turned on, a rising edge is detected, when the rising edge is detected, the capacitance charging is completed, one-time input capture is completed, and finally, the program compares the obtained capacitance charging time with the capacitance charging time without touch to determine whether touch occurs, when touch occurrence is detected, setting corresponding global flag bit, when the main program is switched to one-key dialing task, firstly detecting whether the global flag bit corresponding to the key is 1, if so, executing corresponding AT instruction, dialing corresponding telephone number, wherein each capacitor key corresponds to a fixed telephone number, of course, the telephone number can be edited in the program in advance or written in EEPROM in advance, and when touch event occurs, reading the telephone number from corresponding address.

As shown in fig. 3, the wireless communication functional unit mainly comprises a wireless communication module SIM800C, a SIM card holder, an MIC sound collection circuit, a SPEAKER, and 5 antennas; wherein, pins 9 and 10 of the SIM800C are connected with the input of the MIC or the microphone, and pins 11 and 12 of the SIM800C are connected with the loudspeaker or the earphone; the 32 feet of the SIM800C are connected to a transceiving antenna after passing through two decoupling capacitors of 0.1uF, the 15 feet of the SIM800C are connected with the 5 feet of the SIM card holder, the 16 feet of the SIM800C are connected with the 6 feet of the SIM card holder, the 17 feet of the SIM800C are connected with the 4 feet of the SIM card holder, and the 18 feet of the SIM800C are connected with the 2 feet of the SIM card holder. The overall block diagram of the system shown in fig. 1 mainly includes three parts: the system comprises a capacitive touch key input unit, a microcontroller processing unit and a wireless communication functional unit, wherein the microcontroller processing unit is a mature scheme in the embedded field and mainly comprises five parts, namely a microcontroller, a memory chip, a reset circuit and a clock circuit.

The above description in this specification is merely illustrative of the present invention. Those skilled in the art can make various modifications or additions to the described embodiments or replace them with similar ones, without departing from the scope of the present invention as defined in the following claims.

Claims

1. A one-key dialing electronic system constructed based on capacitive touch keys is characterized in that: the system comprises a capacitance touch key input unit, a microcontroller processing unit and a wireless communication functional unit; the capacitive touch key input unit is realized by matching a small copper-clad area on a printed circuit board with an external charging resistor, each small copper-clad area is connected with one external charging resistor to form a capacitive touch key, and the other end of each charging resistor is connected to a power supply anode VCC.

2. The one-touch-dialing electronic system constructed based on capacitive touch keys of claim 1, further comprising: the microcontroller processing unit comprises a microcontroller, a memory chip, a clock circuit and a reset circuit; the microcontroller adopts an STM32F407 series chip in the meaning and is packaged into LQFP 144.

3. The one-touch-dialing electronic system constructed based on capacitive touch keys of claim 1, further comprising: the wireless communication functional unit mainly comprises a GSM/GPRS/3G/4G communication module matched with an external antenna/PCB antenna/FPC antenna.