Positioning circuit and method based on wireless energy supply and audio signals

Abstract

The invention discloses a positioning circuit and method based on wireless energy supply and audio signals, and relates to the technical field of wireless energy supply technology and audio signal processing, and the technical module comprises an electromagnetic energy generation module, a positioned module, and a positioning signal receiving and calculating module. According to the audio signal positioning circuit and method based on the dual-power-supply setting, energy is efficiently utilized, meanwhile, positioning is conducted through audio signals, compared with a traditional electromagnetic wave or optical positioning method, propagation of the audio signals in a complex environment is more stable, the positioning accuracy can be improved, and the positioning accuracy is improved. The position coordinates of the sound source target are solved by measuring and calculating the time difference between sound signals sent by the sound source target and reaching the sound sensor modules and combining the position coordinates of the sound sensor modules through a sound source positioning algorithm.

Description

Technical Field

[0001] The present invention relates to the fields of wireless power supply technology and audio signal processing technology, and more specifically, to a positioning circuit and method based on wireless power supply and audio signals. Background Art

[0002] In the medical and industrial fields, there is an increasing demand for positioning internal devices or equipment. Traditional positioning methods often rely on wired connections or complex sensor networks, which not only limits the mobility of the equipment but also increases the complexity of the system. Moreover, the existing technology has deficiencies in wireless power supply, audio signal transmission and positioning calculation. Therefore, the development of a circuit and method for wireless power supply and positioning using audio signals is of great significance to improving the flexibility and application scope of positioning technology. Summary of the invention

[0003] In view of the deficiencies in the prior art, the object of the present invention is to provide a positioning circuit and method based on wireless power supply and audio signals.

[0004] The above technical objectives of the present invention are achieved through the following technical solutions: A positioning method based on wireless power supply and audio signals, comprising the following steps:

[0005] Step 1: An electromagnetic energy generating module composed of an electromagnetic signal generating circuit and an electromagnetic energy transmitting coil transmits an electromagnetic oscillation signal;

[0006] Step 2: The electromagnetic energy receiving coil in the located module is responsible for receiving the electromagnetic signal. On the one hand, the electromagnetic signal is converted into DC energy to drive the various circuits of the located module through the electromagnetic energy receiving circuit. On the other hand, the alternating current generated by the electromagnetic energy receiving circuit is directly used to drive the audio generator to work;

[0007] Step 3: The audio generating circuit in the located module generates an electrical signal of an audio frequency and drives the audio generator to generate an audio signal;

[0008] Step 4: Multiple microphones in the positioning signal receiving and calculating module simultaneously receive and collect the audio signal into a digital signal in the audio signal acquisition circuit, and obtain the position of the module to be positioned by positioning calculation of the multiple digital signals;

[0009] Step 5: After obtaining the collected voltage, the electromagnetic signal transmission power is controlled. The transmission power corresponds to the change in the received signal voltage. The DC voltage of the received signal controls the level of the transmitted audio signal. This can realize the collection and positioning of swept frequency signals or various modulated signals.

[0010] Furthermore, in step 2, the dual power supply is set to AC power supply and DC power supply, the AC power supply is the direct utilization of electromagnetic energy, and the DC power supply is generated by a conversion circuit.

[0011] Furthermore, in step 4, the positioning calculation module uses a certain number of microphones to construct a sound source target positioning system.

[0012] Furthermore, in step 5, the feedback forms a negative feedback circuit to control the voltage level of the transmitted audio signal.

[0013] A positioning circuit based on wireless energy supply and audio signals comprises an electromagnetic energy generating module, a positioned module, and a positioning signal receiving and calculating module.

[0014] Furthermore, the electromagnetic energy generating module includes an electromagnetic signal generating circuit and an electromagnetic energy transmitting coil. The electromagnetic energy generating module can transmit an electromagnetic oscillation signal, and the electromagnetic energy generating module can provide energy for the positioning module.

[0015] Furthermore, the located module includes an electromagnetic energy receiving coil, an electromagnetic energy receiving circuit, an audio signal generating circuit and an audio generating device. The located module can receive electromagnetic energy and convert part of the electromagnetic energy into DC energy to drive the audio signal generating circuit to generate an audio signal, and the other part directly drives the audio generator to generate an audio signal.

[0016] Furthermore, the positioning signal receiving and calculating module includes multiple microphones, an audio signal acquisition circuit, and a positioning calculation circuit. The positioning signal receiving and calculating module receives the audio signal emitted by the positioned module, and determines the position of the positioned module through multi-channel digital signal processing and positioning calculation.

[0017] In summary, the present invention has the following beneficial effects:

[0018] 1. Wireless power supply: Through the emission and reception of electromagnetic energy, wireless power supply to the located module is realized, which improves the flexibility and applicability of the system.

[0019] 2. Audio signal positioning circuit and method with dual power supply setting: This design adopts dual power supply setting, that is, direct use of electromagnetic energy and conversion of electromagnetic energy into direct current, which makes efficient use of energy. Compared with traditional electromagnetic wave or optical positioning methods, audio signals are more stable in propagation in complex environments, which is conducive to improving positioning accuracy. By measuring the time difference between the sound signal emitted by the sound source target reaching each sound sensor module, and then using the sound source positioning algorithm combined with the position coordinates of each sound sensor module, the position coordinates of the sound source target are solved.

[0020] 3. Multi-channel signal processing: Audio signals are collected synchronously by multiple microphones and processed in combination with positioning calculation circuits to achieve accurate position calculation of the located module. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a system overall framework diagram of the embodiment provided by the present invention;

[0022] Figure 2 It is the basic transmission form of the embodiment provided by the present invention;

[0023] Figure 3 A circuit diagram of an embodiment provided by the present invention. DETAILED DESCRIPTION

[0024] The present invention is described in detail below in conjunction with the accompanying drawings and embodiments.

[0025] This embodiment provides a positioning circuit and method based on wireless power supply and audio signals, including the following steps:

[0026] Step 1: An electromagnetic energy generating module composed of an electromagnetic signal generating circuit and an electromagnetic energy transmitting coil transmits an electromagnetic oscillation signal.

[0027] Wireless power transmission achieved by electromagnetic coils can achieve higher energy transmission efficiency in the near-field area using magnetically coupled resonant wireless power transmission (MCRWPT) technology. In addition, for implantable medical devices (CR), electromagnetic coil wireless power supply provides friendly biosafety because they do not need to penetrate the skin for energy transmission. In terms of electrical isolation, wireless power supply technology avoids direct electrical connection between the power supply end and the power-consuming device, reducing the risk of electric shock. In terms of technological maturity, wireless power transmission technology has been able to well match the energy supply requirements of flexible electronic devices. In this embodiment, as shown in the figure, the electromagnetic part is only used as energy supply.

[0028] Step 2: The electromagnetic energy receiving coil in the located module is responsible for receiving the electromagnetic signal, and converting the electromagnetic signal into DC energy to drive each circuit of the located module through the electromagnetic energy receiving circuit. On the other hand, the energy received by the electromagnetic energy receiving circuit can also directly power the audio generator, realizing a dual-channel power supply setting and improving the circuit utilization efficiency.

[0029] The simple electromagnetic signal reception and calculation processing in step 2 is cumbersome and has large errors. Therefore, this design adopts the principle of multi-current power supply, that is, AC or DC power supply, to realize the position calculation preprocessing of the audio signal.

[0030] Step 3: The audio generating circuit in the located module generates an electrical signal of an audio frequency and drives the audio generator to generate an audio signal.

[0031] Step 4: Multiple microphones in the positioning signal receiving and calculating module simultaneously receive and collect the audio signal into a digital signal in the audio signal acquisition circuit, and obtain the position of the module to be positioned by positioning calculation of the multiple digital signals.

[0032] The positioning calculation described in step 4 is a position calculation algorithm for calculating the position of the audio signal, as follows: After constructing the basic circuit and obtaining the final acquisition voltage, under the same signal source, even if the two sound sensor modules receive the signals at different times, their waveforms are similar. In order to facilitate understanding and calculation, the audio signal is sampled at a frequency of △ using the signal acquisition module. i is the starting sampling point, E j is the end sampling point, and N is the number of sampling points. The sampling results are s 11 ,s 12 ……s 1n and 21 ,s 22 ……s 2n .

[0033]

[0034] Using the cross-correlation parameters we can get:

[0035]

[0036] In the sampling range [M j ,N j ], let N j -M j =τ0, set the delay number to τ, and τ≤τ0, so Updated to:

[0037]

[0038] According to formula (1), the cross-correlation parameter can be used as a function of τ. In order to obtain the cross-correlation parameters The maximum delay number τ is required to make the two sound sensors receive completely similar sound source signals, and the delay is expressed as Δt:

[0039] Δt=τ·Δ (2)

[0040] Therefore, the sampling value is brought in and the correlation coefficient is calculated. is the τ value at the maximum value. Finally, the time difference between the two signals is measured, and then the distance is calculated through the time difference.

[0041] Step 5: After obtaining the collected voltage, the electromagnetic signal controls the transmission power according to the voltage size. The transmission power corresponds to the change in the received signal voltage. The DC voltage of the received signal controls the level of the transmitted audio signal. This can realize the collection and positioning of swept frequency signals or various modulated signals.

[0042] The feedback can adopt closed-loop feedback control, and the voltage value of the output audio signal can be adjusted by comparing it with the voltage value at the previous moment, so as to accurately obtain the relationship between voltage and position.

[0043] The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A positioning method based on wireless power supply and audio signals, characterized in that: The following steps are involved: Step 1: An electromagnetic energy generating module composed of an electromagnetic signal generating circuit and an electromagnetic energy transmitting coil transmits an electromagnetic oscillation signal; Step 2: The electromagnetic energy receiving coil in the located module is responsible for receiving the electromagnetic signal. On the one hand, the electromagnetic signal is converted into DC energy to drive the various circuits of the located module through the electromagnetic energy receiving circuit. On the other hand, the alternating current generated by the electromagnetic energy receiving circuit is directly used to drive the audio generator to work; Step 3: The audio generating circuit in the located module generates an electrical signal of an audio frequency and drives the audio generator to generate an audio signal; Step 4: Multiple microphones in the positioning signal receiving and calculating module simultaneously receive and collect the audio signal into the audio signal acquisition circuit to synchronously collect the digital signal, and obtain the position of the located module through positioning calculation of the multiple digital signals; Step 5: After obtaining the collected voltage, the electromagnetic signal transmission power is controlled. The transmission power corresponds to the change in the received signal voltage. The DC voltage of the received signal controls the level of the transmitted audio signal. This can realize the collection and positioning of swept frequency signals or various modulated signals.

2. A positioning method based on wireless power supply and audio signals according to claim 1, characterized in that: In step 2, the dual power supply is set to AC power supply and DC power supply, the AC power supply is the direct use of electromagnetic energy, and the DC power supply is generated by a conversion circuit.

3. The positioning method based on wireless power supply and audio signal according to claim 1, characterized in that: In step 4, the positioning calculation module uses a certain number of microphones to construct a sound source target positioning system.

4. The positioning method based on wireless power supply and audio signal according to claim 1, characterized in that: In step 5, the feedback forms a negative feedback circuit to control the voltage level of the transmitted audio signal.

5. The positioning circuit based on wireless power supply and audio signal according to claim 1, characterized in that: It includes an electromagnetic energy generating module, a positioned module, and a positioning signal receiving and calculating module.

6. A positioning circuit based on wireless power supply and audio signal according to claim 5, characterized in that: The electromagnetic energy generating module includes an electromagnetic signal generating circuit and an electromagnetic energy transmitting coil. The electromagnetic energy generating module can transmit an electromagnetic oscillation signal. The electromagnetic energy generating module can provide energy for the positioning module.

7. The positioning circuit based on wireless power supply and audio signal according to claim 5, characterized in that: The located module includes an electromagnetic energy receiving coil, an electromagnetic energy receiving circuit, an audio signal generating circuit and an audio generating device. The located module can receive electromagnetic energy and convert part of the electromagnetic energy into DC energy to drive the audio signal generating circuit to generate an audio signal, and the other part directly drives the audio generator to generate an audio signal.

8. The positioning circuit based on wireless power supply and audio signal according to claim 5, characterized in that: The positioning signal receiving and calculating module includes multiple microphones, an audio signal acquisition circuit, and a positioning calculation circuit. The positioning signal receiving and calculating module receives the audio signal emitted by the positioned module, and determines the position of the positioned module through multi-channel digital signal processing and positioning calculation.

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