CN218941088U

CN218941088U - Color screen amateur interphone capable of transmitting characters

Info

Publication number: CN218941088U
Application number: CN202222994967.9U
Authority: CN
Inventors: 陈日清
Original assignee: Quanzhou Iradio Electronics Co ltd
Current assignee: Quanzhou Iradio Electronics Co ltd
Priority date: 2022-11-10
Filing date: 2022-11-10
Publication date: 2023-04-28
Anticipated expiration: 2032-11-10

Abstract

The utility model relates to a color screen amateur interphone capable of transmitting characters, which comprises a microprocessor, a radio frequency chip, a color liquid crystal screen, a radio frequency receiving and transmitting antenna and a FLASH memory, wherein the radio frequency chip is connected with the microprocessor and a microphone, the color liquid crystal screen, an array keyboard board and the FLASH memory are respectively connected with the microprocessor, the microprocessor is also connected with a volume regulator through a filter shaping circuit, a loudspeaker is connected with the volume regulator through an audio power amplifier, and the volume regulator is also connected with the radio frequency chip. The utility model stores debug data, frequency point data, word stock and voice data in Flash, and can display characters on a color liquid crystal screen by contrasting the word stock in a Flash memory after receiving codes; after the microprocessor reads the voice data in Flash, the voice data can be converted into PWM waveforms by utilizing the self PWM function, and then the PWM waveforms are converted into analog voice waveforms through the filter shaping circuit and sent into the audio power amplifier.

Description

Color screen amateur interphone capable of transmitting characters

Technical Field

The utility model relates to the technical field of interphones, in particular to a color screen amateur interphone capable of transmitting characters.

Background

The typical analog amateur interphone transmits data by means of DTMF, FSK or MDC, etc., while DTMF, FSK or MDC only transmit very little data. The number of the commonly used Chinese characters is thousands or more, and the code of each Chinese character is doubled compared with the ASCII characters, so that the required data volume is larger, and the matching of a word stock chip is required. In addition, the voice broadcasting needs to be externally hung with a special voice chip. In addition, when the language is not Chinese character, the word stock chip of other languages needs to be replaced.

Disclosure of Invention

In view of the defects of the prior art, the technical problem to be solved by the utility model is to provide the color screen amateur interphone capable of transmitting characters, which can realize the transmission of characters and voice broadcasting while realizing the interphone.

In order to solve the technical problems, the utility model adopts the following technical scheme:

the color screen amateur interphone comprises a microprocessor, a radio frequency chip, a color liquid crystal screen, a radio frequency receiving and transmitting antenna, a FLASH memory, an array keyboard board, a microphone and a loudspeaker, wherein the radio frequency chip adopts a BK4819 chip and is connected with the microprocessor and the microphone, and two paths of receiving channels and two paths of transmitting channels are connected between the radio frequency chip and the radio frequency receiving and transmitting antenna; the color liquid crystal display, the array keyboard board and the FLASH memory are respectively connected with a microprocessor, the microprocessor is also connected with a volume regulator through a filtering and shaping circuit, the loudspeaker is connected with the volume regulator through an audio power amplifier, and the volume regulator is also connected with a radio frequency chip.

Preferably, the array keyboard on the array keyboard board is connected with the microprocessor through a flexible flat cable.

Preferably, the color liquid crystal screen is internally provided with an ST7735 driving chip and is connected with the microprocessor through a flip type flat cable seat.

Preferably, the radio frequency transceiver antenna is a UV dual-band radio frequency antenna.

Preferably, the back side of the array keyboard plate is provided with a mounting groove, and the loudspeaker is fixed in the mounting groove of the array keyboard plate through a weight and a screw.

Preferably, the interphone further comprises a radio chip, wherein the radio chip is connected with the microprocessor, and a radio channel is connected between the radio chip and the radio frequency receiving and transmitting antenna.

Preferably, the radio chip employs BK1080.

Compared with the prior art, the utility model has the following beneficial effects:

the interphone disclosed by the utility model adopts the BK4819 chip as a radio frequency chip and the BK1080 chip as a radio chip, is matched with a proper microprocessor for control, and different types of microprocessors are required to be selected for different functional designs. The microprocessor receives signals of the keys and the keyboard operation of the interphone body, and controls the interphone to enter, set or exit the menu, emit radio frequency and the like according to different operations. The Flash memory stores debugging data, frequency point data, word stock and voice data, simple codes are transmitted through MDC or FSK characteristics of BK4819, and after receiving the codes, the receiving-end interphone can display characters on the color liquid crystal screen by contrasting the word stock in the Flash memory; after the microprocessor reads the voice data in Flash, the voice data can be converted into PWM waveforms by utilizing the self PWM function, and then the PWM waveforms are converted into analog voice waveforms through the filter shaping circuit and sent into the audio power amplifier. The volume regulator of the body changes the volume of the loudspeaker by changing the amplitude of the signal sent to the audio power amplifier.

Drawings

Fig. 1 is a schematic block diagram of an intercom of the present utility model.

Detailed Description

In order to make the above features and advantages of the present utility model more comprehensible, embodiments accompanied with figures are described in detail below.

As shown in fig. 1, the present embodiment provides a color-screen amateur interphone capable of transmitting text, which comprises a microprocessor 10, a radio frequency chip 20, a color liquid crystal screen 13, a radio frequency transceiver antenna 21, a FLASH memory 30, an array keyboard board, keys 11, a microphone 22 and a speaker 17.

In this embodiment, the microprocessor 10 selects a suitable microprocessor from the market, for example, STM32F405RG may be used.

In this embodiment, the radio frequency chip 20 adopts a BK4819 chip and is connected with a microprocessor, and two paths of receiving channels and two paths of transmitting channels are connected between the radio frequency chip 20 and the radio frequency transceiver antenna 21: a receiving channel control switch is connected between the two receiving channels and the radio frequency chip 20, and one receiving channel can be selected by the receiving channel control switch, and the two receiving channels are respectively a 100-240MHz receiving channel and a 240-520MHz receiving channel. An emission channel control switch is connected between the two emission channels and the radio frequency chip, and can select one emission channel through the emission channel control switch, and the two emission channels are respectively a 100-240MHz emission channel and a 240-520MHz emission channel. Both the receive channel control switch and the transmit channel control switch are commercially available and configured, and the receive channel control switch and the transmit channel control switch are controllable by the rf chip 20 and are conventional techniques, and are not described in detail herein.

The radio frequency chip 20 of the present embodiment is connected to the microphone 22 and the volume regulator 15, the speaker 17 is connected to the volume regulator 15 through the audio power amplifier 16, and intercom voice transmission is achieved through the microphone 22, the radio frequency chip 20, the transmitting channel and the radio frequency receiving and transmitting antenna 21, and intercom voice reception is achieved through the radio frequency receiving and transmitting antenna 21, the receiving channel, the radio frequency chip 20, the volume regulator 15, the audio power amplifier 16 and the speaker 17.

The radio frequency receiving and transmitting antenna 21 in this embodiment is a UV dual-band radio frequency antenna, the interphone further includes a radio chip 40, the radio chip 40 adopts BK1080 and is connected with the microprocessor 10, a radio channel is connected between the radio chip 40 and the radio frequency receiving and transmitting antenna 21, and the radio chip 40 is further connected to the volume regulator 15, so as to receive an FM radio signal of 64M-108MHz, and realize a radio function.

In this embodiment, the color lcd 13, the key 11, the array keyboard board and the FLASH memory 30 are respectively connected to the microprocessor 10, and the microprocessor 10 is further connected to the volume adjuster 15 through the filter shaping circuit 14. The character library is written in the Flash memory 30 in advance and is correspondingly coded, so that simple codes can be transmitted through the MDC or FSK characteristics of BK4819, and characters can be displayed on the color liquid crystal display 13 by contrasting the character library in the Flash memory 30 after the receiving-end interphone receives the codes; simultaneously, voice data is written in the Flash memory 30 in advance, and voice playing can be performed through the PWM function of the microprocessor 10, so that the flash+PWM voice playing mode is more flexible and convenient compared with the fixed voice of the voice chip IC.

The color liquid crystal screen 13 of the embodiment is installed on the front surface of the intercom housing, is internally provided with a ST7735 driving chip and is connected with the microprocessor 10 through a flip type flat cable seat, and the color liquid crystal screen 13 can be used for freely displaying text menus or pictures.

The array keyboard board is installed on the front surface of the intercom shell and the array keyboard 12 thereon is connected with the microprocessor 10 through a flexible flat cable, and the specific use of the 4 x 4 array keyboard 12 is convenient for users to select different menu settings and conveniently set working frequency points, and the array keyboard 12 is connected through the flexible flat cable, so that the disassembly is convenient. The mounting groove has been seted up to array keyboard board backside, speaker 17 is fixed in the mounting groove of array keyboard board through weight and screw, need not to beat the glue, convenient to detach changes.

The interphone can charge a lithium battery block with the maximum voltage of 8.4V in a mode of boosting charging or charging by a seat through the body type C, and the lithium battery block stabilizes the voltage to 3.3V through a voltage stabilizing circuit and then supplies power for the whole interphone circuit.

While the basic principles and main features of the utility model and advantages of the utility model have been shown and described, it will be understood by those skilled in the art that the present utility model is not limited by the foregoing embodiments, which are described in the foregoing description merely illustrate the principles of the utility model, and various changes and modifications may be made therein without departing from the spirit and scope of the utility model as defined in the appended claims and their equivalents.

Claims

1. The utility model provides a color screen amateur intercom of transmissible characters which characterized in that: the device comprises a microprocessor, a radio frequency chip, a color liquid crystal screen, a radio frequency receiving and transmitting antenna, a FLASH memory, an array keyboard plate, a microphone and a loudspeaker, wherein the radio frequency chip adopts a BK4819 chip and is connected with the microprocessor and the microphone, and two paths of receiving channels and two paths of transmitting channels are connected between the radio frequency chip and the radio frequency receiving and transmitting antenna; the color liquid crystal display, the array keyboard board and the FLASH memory are respectively connected with a microprocessor, the microprocessor is also connected with a volume regulator through a filtering and shaping circuit, the loudspeaker is connected with the volume regulator through an audio power amplifier, and the volume regulator is also connected with a radio frequency chip; and writing a character library into the Flash memory in advance and correspondingly coding.

2. The text-transmissible color-screen amateur interphone of claim 1, characterized in that: the color liquid crystal screen is internally provided with an ST7735 driving chip and is connected with the microprocessor through a flip type flat cable seat.

3. The text-transmissible color-screen amateur interphone of claim 1, characterized in that: and an array keyboard on the array keyboard board is connected with the microprocessor through a flexible flat cable.

4. The text-transmissible color-screen amateur interphone of claim 1, characterized in that: the mounting groove is formed in the back side of the array keyboard plate, and the loudspeaker is fixed in the mounting groove of the array keyboard plate through the weight and the screw.

5. The text-transmissible color-screen amateur interphone of claim 1, characterized in that: the radio frequency receiving and transmitting antenna is a UV dual-band radio frequency antenna.

6. The text-transmissible color-screen amateur interphone of claim 5, characterized in that: the interphone also comprises a radio chip, wherein the radio chip is connected with the microprocessor, and a radio channel is connected between the radio chip and the radio frequency receiving and transmitting antenna.

7. The text-transmissible color-screen amateur intercom of claim 6, wherein: the radio chip adopts BK1080.