CN202841453U - Classroom microphone based on wireless radio frequency and frequency hopping technologies - Google Patents
Classroom microphone based on wireless radio frequency and frequency hopping technologies Download PDFInfo
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- CN202841453U CN202841453U CN 201220544085 CN201220544085U CN202841453U CN 202841453 U CN202841453 U CN 202841453U CN 201220544085 CN201220544085 CN 201220544085 CN 201220544085 U CN201220544085 U CN 201220544085U CN 202841453 U CN202841453 U CN 202841453U
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Abstract
Disclosed is a classroom microphone based on wireless radio frequency and frequency hopping technologies. The defect that an existing microphone for a voice teaching system is large in size and high in weight and power consumption can be overcome by the use of the wireless radio frequency and frequency hopping technologies. The classroom microphone based on the wireless radio frequency and frequency hopping technologies comprises a microphone (1) which is connected with a power amplifier (2), the power amplifier is connected with a voice processing module, the voice processing module is connected with a power supply (7), a memory (10), an oscillator (9) and a wireless receiver (6), the voice processing module is provided with a microcontroller (4), a digital-to-analog converter (8), an analog-to-digital converter (3) and a radio frequency device (5), one end of the microcontroller is connected with the digital-to-analog converter and the analog-to-digital converter, the other end of the microcontroller is connected with the radio frequency device, and the microcontroller is provided with a chip. The classroom microphone based on the wireless radio frequency and frequency hopping technologies is used for all factories, schools and meetings.
Description
Technical field:
The utility model relates to the classroom microphone device of a kind of less radio-frequency and frequency hopping.
Background technology:
The used microphone device of existing voice teaching system all is that volume is large, and quality is large, carries and uses inconvenience; Power consumption is large, the frequent battery; Employing fixed frequency communication is vulnerable to disturb, and affect communication quality, and confidentiality and antijamming capability are lower, and infinitely radio frequency and frequency hopping just can overcome above-mentioned shortcoming.
Summary of the invention:
The purpose of this utility model is exactly the communication mode that the carrier frequency of utilizing receiving-transmitting sides signal transmission in the Frequency-hopping Communication Technology is jumped simultaneously/become according to certain predetermined rule, makes confidentiality, anti-interference and the anti fading ability of wireless telecommunications that significant raising arranged; Its easier with traditional arrowband communication is compatible mutually, is easy to promote the use of.
Above-mentioned purpose realizes by following technical scheme:
The classroom microphone device of a kind of less radio-frequency and frequency hopping, its composition comprises: microphone, described microphone is connected with power amplifier, described power amplifier is connected with speech processing module, described speech processing module and power supply, memory, oscillator and wireless receiver connect, described speech processing module has microcontroller, the digital-to-analogue converter, analog to digital converter and radio-frequency (RF) device, described microcontroller one end is connected with analog to digital converter with described digital-to-analogue converter, the described microcontroller other end is connected with radio-frequency (RF) device, and described microcontroller has chip.
The classroom microphone device of described less radio-frequency and frequency hopping, described chip are nR24E1, and described memory is EEPROM (Electrically Erasable Programmable Read Only Memo).
Beneficial effect:
1. the chip of the utility model microcontroller is nR24E1,, maximum advantage is to have the carrier detect function; Under specific receiving mode, during radio-frequency carrier within the nR24E1 working channel occurring, carrier detect pin (CD) is set high, this characteristic has well been avoided the collision between the different emitter data bags under the same operating frequency, effectively prevented the interference of signal, so that Mike and phonetic incepting system reach Frequency Synchronization;
2. the speech processing module of the utility model employing after digital-to-analogue conversion and analog-to-digital conversion, is 200 meters in its transmission range, and when delaying time less than 150ms, acoustical testing reaches 3.8, and therefore originally practical property has the advantage that tonequality is good, cost is low.
The frequency hopping that the utility model adopts has strong security, and ' antijamming capability is strong, have the multiple access networking capability, have anti-fading ability and be easy to ability with traditional narrow-band communication system compatibility.
The utility model adopts the mode of high concentration, and equipment volume is little, lightweight, portably uses conveniently; System power dissipation is low, and is energy-conservation, avoided the trouble of frequent battery.
Description of drawings:
Accompanying drawing 1 is the structural representation of this product.
Embodiment:
Embodiment 1:
The classroom microphone device of a kind of less radio-frequency and frequency hopping, its composition comprises: microphone 1, described microphone is connected with power amplifier 2, described power amplifier is connected with speech processing module, described speech processing module is connected with power supply 7, memory 10, oscillator 9 and wireless receiver 6, described speech processing module has microcontroller 4, digital-to-analogue converter 8, analog to digital converter 3 and radio-frequency (RF) device 5, described microcontroller one end is connected with analog to digital converter with described digital-to-analogue converter, and the described microcontroller other end is connected with radio-frequency (RF) device.
Embodiment 2:
The classroom microphone device of described less radio-frequency and frequency hopping, described chip are nR24E1, and described memory is EEPROM (Electrically Erasable Programmable Read Only Memo).
Embodiment 3:
(1) after the start operation, microcontroller at first reads EEPROM (EEPROM (Electrically Erasable Programmable Read Only Memo)) internal program;
(2) manually press the Frequency Synchronization button after, the microcontroller in the speech processing module is so that Mike and phonetic incepting system reach Frequency Synchronization;
(3) input signal is waited in simultaneously initialization of Mike and phonetic incepting system;
(4) when the voice signal input is arranged, signal is carried out analog-to-digital conversion, give the buffer in the microcontroller;
(5) voice signal in the buffer is transferred to Radio (front end of emission), and then sends to phonetic incepting equipment by SPI (Serial Peripheral Interface).
Phonetic incepting equipment is by software, and it is set to continuous retrieval status, when having retrieved the voice signal input, gives buffer with the voice signal of receiving; By digital-to-analogue conversion, give loud speaker with voice signal again.
Claims (2)
1. the classroom microphone device of a less radio-frequency and frequency hopping, its composition comprises: microphone, it is characterized in that: described microphone is connected with power amplifier, described power amplifier is connected with speech processing module, described speech processing module and power supply, memory, oscillator and wireless receiver connect, described speech processing module has microcontroller, the digital-to-analogue converter, analog to digital converter and radio-frequency (RF) device, described microcontroller one end is connected with analog to digital converter with described digital-to-analogue converter, the described microcontroller other end is connected with radio-frequency (RF) device, and described microcontroller has chip.
2. the classroom microphone device of less radio-frequency according to claim 1 and frequency hopping, it is characterized in that: described chip is nR24E1, described memory is EEPROM (Electrically Erasable Programmable Read Only Memo).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220544085 CN202841453U (en) | 2012-10-23 | 2012-10-23 | Classroom microphone based on wireless radio frequency and frequency hopping technologies |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220544085 CN202841453U (en) | 2012-10-23 | 2012-10-23 | Classroom microphone based on wireless radio frequency and frequency hopping technologies |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202841453U true CN202841453U (en) | 2013-03-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220544085 Expired - Fee Related CN202841453U (en) | 2012-10-23 | 2012-10-23 | Classroom microphone based on wireless radio frequency and frequency hopping technologies |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202841453U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104796820A (en) * | 2014-01-20 | 2015-07-22 | 快捷半导体(苏州)有限公司 | Detection circuit and method for mobile device |
-
2012
- 2012-10-23 CN CN 201220544085 patent/CN202841453U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104796820A (en) * | 2014-01-20 | 2015-07-22 | 快捷半导体(苏州)有限公司 | Detection circuit and method for mobile device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130327 Termination date: 20131023 |