CN215067255U - Indoor positioner based on pseudo-supersound - Google Patents
Indoor positioner based on pseudo-supersound Download PDFInfo
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- CN215067255U CN215067255U CN202121185162.9U CN202121185162U CN215067255U CN 215067255 U CN215067255 U CN 215067255U CN 202121185162 U CN202121185162 U CN 202121185162U CN 215067255 U CN215067255 U CN 215067255U
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Abstract
The utility model relates to an indoor location technical field especially relates to an indoor positioner based on pseudo-supersound, including the base station end, the base station end includes main control chip, band pass filter, power amplifier and high pitch loudspeaker, the band pass filter input is connected with the main control chip electricity, the band pass filter output is connected with power amplifier's input electricity, power amplifier's output and high pitch loudspeaker electricity are connected, main control chip receives the instruction of sending positioning signal from the synchronous end of clock, produce the modulation positioning signal, the interference signal of other frequency channels of band pass filter filtering, high pitch loudspeaker sends pseudo-ultrasonic wave, positioning terminal receives the time difference that the pseudo-ultrasonic wave signal that different base stations sent produced according to its adapter and calculates positioning terminal's position and gives the user with the result transmission, this positioner simple structure, easy the constitution can realize under indoor environment can reach decimeter level positioning accuracy and other positioning terminal relatively in the aspect of the cost The system has significant advantages.
Description
Technical Field
The utility model relates to an indoor location technical field especially relates to an indoor positioner based on pseudo-supersound.
Background
Research on indoor positioning technology based on acoustic signals is underway. Depending on the acoustic signal frequency, we can comb the acoustic signal-based indoor positioning techniques into three categories: audible-based, pseudo-ultrasound-based and ultrasound-based, with the difference that the audible-based indoor localization techniques mainly localize by means of sound signals with frequencies in the range of 20Hz-15kHz as localization signals, which easily causes noise interference, the ultrasound-based indoor localization techniques typically localize by means of sound signals with frequencies above 30kHz as localization signals; the method needs special ultrasonic playing equipment, and signals are easily shielded; the indoor positioning technology based on the pseudo-ultrasound mainly uses the acoustic signal with the frequency ranging from 15kHz to 22kHz as the positioning signal to position, wherein the pseudo-ultrasound signal has the advantages of strong anti-interference performance, strong privacy and the like compared with an audible acoustic signal, and can not cause noise interference to the movement of a human body. How to provide a pseudo-ultrasonic positioning device with simple structure and good positioning accuracy becomes the research direction in the field.
SUMMERY OF THE UTILITY MODEL
The utility model provides an indoor positioner based on pseudo-supersound adopts TDOA positioning algorithm, realizes good indoor positioning accuracy.
In order to achieve the above object, the utility model provides a following technical scheme:
the utility model provides an indoor positioner based on pseudo-supersound, including base station end, clock synchronization end and positioning terminal, the base station end includes main control chip, wireless communication module, band pass filter, power amplifier and high pitch loudspeaker, wireless communication module is connected with main control chip input pin electricity, the band pass filter input is connected with main control chip's DAC pin electricity, the band pass filter output is connected with power amplifier's input electricity, power amplifier's output is connected with high pitch loudspeaker electricity, main control chip receives the instruction of sending the locating signal from clock synchronization end through wireless communication module, produce chirp modulation locating signal through the DAC pin, bring the interference signal of other frequency channels through band pass filter filtering modulation, amplify through power amplifier at last and carry high pitch loudspeaker, high pitch loudspeaker sends pseudo-ultrasonic wave, positioning terminal receives the time difference that pseudo-ultrasonic wave signal that different base stations sent produced according to its adapter and calculates the location The location of the terminal and the results are transmitted to the user.
Furthermore, the positioning terminal transmits the signal to the user through the Bluetooth communication module.
Further, the main control chip adopts STM32F 103.
Further, the wireless communication module adopts an NRF24L01 module.
The indoor positioning device based on the pseudo-ultrasound is simple in structure, easy to construct, capable of achieving decimeter-level positioning accuracy in an indoor environment and has obvious advantages in cost compared with other positioning systems.
Drawings
Fig. 1 is a block diagram of a base station end structure of an indoor positioning device based on pseudo-ultrasound according to an embodiment of the present invention.
Detailed Description
The present invention will be further described with reference to the following examples.
Referring to fig. 1, an indoor positioning device based on pseudo-ultrasound comprises a base station end, a clock synchronization end and a positioning terminal, wherein the base station end comprises a main control chip, a wireless communication module, a band-pass filter, a power amplifier and a high pitch loudspeaker, the wireless communication module is electrically connected with an input pin of the main control chip, an input end of the band-pass filter is electrically connected with a DAC pin of the main control chip, an output end of the band-pass filter is electrically connected with an input end of the power amplifier, an output end of the power amplifier is electrically connected with the high pitch loudspeaker, the main control chip receives a positioning signal sending instruction from the clock synchronization end through the wireless communication module, generates a chirp modulation positioning signal through the DAC pin, filters interference signals brought by modulation through the band-pass filter, finally amplifies the interference signals to the high pitch loudspeaker through the power amplifier, and the high pitch loudspeaker sends pseudo-ultrasound waves, the positioning terminal calculates the position of the positioning terminal according to the time difference generated by the sound pick-up receiving pseudo ultrasonic signals sent by different base stations and transmits the result to a user;
in this embodiment, the positioning terminal transmits a signal to a user through the bluetooth communication module;
in this embodiment, the main control chip employs an STM32F 103;
in this embodiment, the wireless communication module adopts an NRF24L01 module.
Claims (4)
1. The utility model provides an indoor positioner based on pseudo-supersound, includes clock synchronization end, location terminal and is no less than 4 base station ends of deploying at definite position, characterized in that, the base station end includes main control chip, wireless communication module, band pass filter, power amplifier and high pitch loudspeaker, and wireless communication module is connected with main control chip input pin electricity, and the band pass filter input is connected with main control chip's DAC pin electricity, and the band pass filter output is connected with power amplifier's input electricity, and power amplifier's output and high pitch loudspeaker electricity are connected.
2. The pseudo-ultrasound-based indoor positioning apparatus according to claim 1, wherein the positioning terminal transmits a signal to a user through a bluetooth communication module.
3. The pseudo-ultrasound-based indoor positioning apparatus according to claim 1, wherein the main control chip employs STM32F 103.
4. The pseudo-ultrasound based indoor positioning apparatus of claim 1, wherein the wireless communication module employs an NRF24L01 module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121185162.9U CN215067255U (en) | 2021-05-31 | 2021-05-31 | Indoor positioner based on pseudo-supersound |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121185162.9U CN215067255U (en) | 2021-05-31 | 2021-05-31 | Indoor positioner based on pseudo-supersound |
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| Publication Number | Publication Date |
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| CN215067255U true CN215067255U (en) | 2021-12-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202121185162.9U Active CN215067255U (en) | 2021-05-31 | 2021-05-31 | Indoor positioner based on pseudo-supersound |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111983564A (en) * | 2020-08-12 | 2020-11-24 | 中国计量大学 | Sound positioning system and positioning method based on TDOA |
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2021
- 2021-05-31 CN CN202121185162.9U patent/CN215067255U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111983564A (en) * | 2020-08-12 | 2020-11-24 | 中国计量大学 | Sound positioning system and positioning method based on TDOA |
| CN111983564B (en) * | 2020-08-12 | 2023-03-03 | 中国计量大学 | Sound positioning system and positioning method based on TDOA |
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