CN114646952A - Distance acquisition method, device, system, storage medium and electronic equipment - Google Patents

Abstract

A distance acquisition method, device, system, storage medium and electronic device, wherein time synchronization is performed with an external device to obtain a time difference between the electronic device and the external device, and the target sending time and time difference for transmitting a ranging signal to the external device, When reaching the target sending time, a ranging signal is sent to the external device, and the spatial distance between the external device and the electronic device returned by the external device is received. The spatial distance is received by the external device according to the ranging signal, target sending time, time difference and the external device. Calculated from the actual receiving moment of the ranging signal. Among them, the time difference between the electronic device and the external device is obtained by synchronizing the time between the electronic device and the external device, and further using the time difference, the measurement between the electronic device and the external device can be realized by sending and receiving a ranging signal once. It can improve the efficiency of distance measurement between devices.

Description

Distance acquisition method, device, system, storage medium and electronic device

technical field

The embodiments of the present application relate to the field of computer technologies, and in particular, to a distance acquisition method, apparatus, system, storage medium, and electronic device.

Background technique

With the rapid development of computer technology, the measurement of the distance between objects no longer depends on manual field measurement, but the measurement of the distance between objects is realized through the time of signal transmission and reception. However, in the related art, the devices need to exchange the time for transmitting and receiving the ranging signal multiple times to realize the ranging, and the efficiency is low.

SUMMARY OF THE INVENTION

The present application provides a distance acquisition method, device, system, storage medium and electronic device, which can improve the efficiency of distance measurement.

In a first aspect, the present application provides a method for obtaining a distance, which is applied to an electronic device, including:

Perform time synchronization with an external device to obtain the time difference between the electronic device and the external device;

The target sending time and the time difference for transmitting the ranging signal to the external device;

Send the ranging signal to the external device when the target sending time is reached;

receiving the spatial distance between the external device and the electronic device returned by the external device, the spatial distance is determined by the external device according to the ranging signal, the target sending time, the time difference and the It is calculated by the actual receiving moment when the external device receives the ranging signal.

In a second aspect, the present application provides a distance acquisition device, which is applied to electronic equipment, including:

an acquisition module, configured to perform time synchronization with an external device to obtain the time difference between the electronic device and the external device;

a time information transmission module, configured to transmit the target sending time of the ranging signal and the time difference to the external device;

a ranging signal sending module, configured to send the ranging signal to the external device when the target sending time is reached;

A spatial distance receiving module, configured to receive the spatial distance between the external device and the electronic device returned by the external device, and the spatial distance is determined by the external device according to the ranging signal and the target sending time , the time difference, and the actual receiving moment when the external device receives the ranging signal.

In a third aspect, the present application provides a method for obtaining a distance, which is applied to an electronic device, including:

Perform time synchronization with an external device to obtain the time difference between the electronic device and the external device;

receiving the target sending time of the ranging signal transmitted by the external device;

receiving the ranging signal sent by the external device;

Calculate the spatial distance between the electronic device and the external device according to the target sending time, the time difference, the ranging signal, and the actual receiving time when the ranging signal is received, and calculate the spatial distance between the electronic device and the external device. The distance is sent to the external device.

In a fourth aspect, the present application provides a distance acquisition device, which is applied to electronic equipment, including:

a synchronization module, configured to perform time synchronization with an external device to obtain the time difference between the electronic device and the external device;

a time information receiving module, configured to receive the target sending time of the ranging signal transmitted by the external device;

a ranging signal receiving module, configured to receive the ranging signal sent by the external device;

A space distance sending module, configured to calculate the space between the electronic device and the external device according to the target sending time, the time difference, the ranging signal and the actual receiving time when the ranging signal is received distance, and send the spatial distance to the external device.

In a fifth aspect, the present application provides a distance acquisition system, including an electronic device and an external device, wherein the electronic device is configured to perform time synchronization with the external device to obtain a distance between the electronic device and the external device. time difference, and transmit the target sending time of the ranging signal and the time difference to the external device, when the target sending time is reached, send the ranging signal to the external device, and receive the the spatial distance between the external device and the electronic device;

The external device is configured to receive the ranging signal and the time difference sent by the electronic device, and according to the target sending time, the time difference, the ranging signal and the actual receiving time when the ranging signal is received, Calculate the spatial distance between the external device and the electronic device, and send the spatial distance to the electronic device.

In a sixth aspect, the present application provides a storage medium on which a computer program is stored, and when the computer program is loaded by a processor of an electronic device, the steps in any of the distance acquisition methods provided by the present application are executed.

In a seventh aspect, the present application also provides an electronic device, the electronic device includes a processor and a memory, the memory stores a computer program, and the processor executes any distance acquisition method as provided in the present application by loading the computer program stored in the memory. A step of.

In this application, the time difference between the electronic device and the external device is obtained by synchronizing the time between the electronic device and the external device, and by further utilizing the time difference, the distance between the electronic device and the external device can be realized by sending and receiving a ranging signal once. Compared with the related art, the present application does not need to send the receiving time of the ranging signal, and the external device directly calculates the spatial distance from the electronic device according to the target sending time, the actual receiving time and the time difference, which reduces the number of data transmissions and can improve the The efficiency of distance measurement between devices. Among them, by sending the target sending time of the ranging signal to the external device, it is convenient for the external device to prepare for receiving the ranging signal according to the target sending time, so as to ensure the smooth sending and receiving of the ranging signal, and the smooth sending and receiving of the ranging signal. Provide a basis for accurate measurement of the distance between devices. Among them, by returning the measured spatial distance to the sender of the ranging signal, the sender of the ranging signal can obtain the spatial distance with the external device after sending the ranging signal, which is convenient for subsequent application of the spatial distance.

Description of drawings

In order to illustrate the technical solutions in the present application more clearly, the following briefly introduces the accompanying drawings used in the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those skilled in the art, other drawings can also be obtained from these drawings without any creative effort.

1 is a schematic flowchart of a distance acquisition method provided by an embodiment of the present application;

2 is a schematic diagram of interaction between an electronic device and an external device in a distance acquisition method provided by an embodiment of the present application;

FIG. 3 is another schematic flowchart of a distance acquisition method provided by an embodiment of the present application;

4 is a schematic flowchart of a specific flow of time synchronization between devices and performing ranging between devices in a distance acquisition method provided by an embodiment of the present application;

5 is a schematic flowchart of data transmission in a distance acquisition process provided by an embodiment of the present application;

6 is a schematic structural diagram of a distance acquisition system provided by an embodiment of the present application;

7 is a schematic structural diagram of a distance acquisition device provided by an embodiment of the present application;

8 is another schematic structural diagram of a distance acquisition device provided by an embodiment of the present application;

FIG. 9 is a structural block diagram of an electronic device provided by an embodiment of the present application.

Detailed ways

It should be noted that the terms "first", "second" and "third" in the present application are used to distinguish different objects, rather than to describe a specific order. Furthermore, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or modules is not limited to the listed steps or modules, but some embodiments also include unlisted steps or modules, or some embodiments Other steps or modules inherent to these processes, methods, products or devices are also included.

Reference herein to an "embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor a separate or alternative embodiment that is mutually exclusive of other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

The embodiments of the present application provide a distance acquisition method, a distance acquisition device, a distance acquisition system, a storage medium, and an electronic device, wherein the execution subject of the distance acquisition method may be the distance acquisition device provided in the embodiments of the present application, or an integrated distance acquisition method. The electronic equipment of the device, wherein the distance acquisition device can be implemented by means of hardware or software. The electronic device may be a device equipped with a processor and having data processing capability, such as a smart phone, a tablet computer, a palmtop computer, and a notebook computer.

Please refer to FIG. 1, which is a schematic flowchart of a distance acquisition method provided by an embodiment of the present application. As shown in FIG. 1, the distance acquisition method is applied to an electronic device, and the process of the distance acquisition method provided by the embodiment of the present application may be as follows:

101. Perform time synchronization with an external device to obtain a time difference between the electronic device and the external device.

Among them, in the embodiment of the present application, the external device is the peer device that performs spatial distance measurement with the electronic device. Calculate.

Among them, due to the different timing rates and operating environments of the local clocks of different devices, the timing times of different devices are different, and in the embodiment of the present application, by synchronizing the time between the electronic device and the external device, it is possible to obtain the electronic device and the external device. time difference. The acquisition of the time difference can facilitate the subsequent acquisition of the actual propagation time of the ranging signal according to the time difference, thereby realizing effective measurement of the spatial distance between the electronic device and the external device.

Wherein, in the embodiment of the present application, the time synchronization between the electronic device and the external device may be implemented through a data transmission link, for example, by establishing a data transmission link between the electronic device and the external device, so that the electronic device and the external device Time information can be exchanged with each other through a data transmission link to realize time synchronization between the electronic device and the external device, that is, optionally, in some embodiments of the present application, the step of "synchronizing time with the external device" includes :

Establish a data transmission link with the communication chip of the external device through the communication chip of the electronic device;

Time synchronization is performed with the external device via the data transmission link.

Wherein, in this embodiment of the present application, both the electronic device and the external device may be provided with a communication chip. For example, please refer to FIG. 2. FIG. 2 is a schematic diagram of interaction between the electronic device and the external device provided by the embodiment of the present application. The chip is used to establish a data transmission link between the electronic device and the external device. For example, the communication chips can exchange address information with each other, and establish a data transmission link between the electronic device and the external device according to the address information.

Among them, after the electronic device and the external device exchange time information with each other through the data transmission link, each can obtain the time information of the other party, realize the time synchronization between the electronic device and the external device, and then realize the time difference between the electronic device and the external device. Obtain.

102. Transmit the target sending time of the ranging signal and the time difference to the external device.

Among them, the ranging signal is a signal that can be sent and received. By sending and receiving the ranging signal by two objects respectively, the propagation time of the ranging signal between the two objects can be obtained. The propagation time between two objects can be used to calculate the distance between the two objects. For example, the propagation time of the ranging signal between the two objects and the propagation rate can be used to realize the travel distance of the ranging signal in the propagation time. , where the moving distance of the ranging signal is the spatial distance between two objects.

Among them, in the embodiment of the present application, the target sending time is the time when the ranging signal is sent. By transmitting the target sending time to the external device, after receiving the sending time of the ranging signal sent by the electronic device, the external device can The preparation for receiving the ranging signal is made at the time of sending, which is convenient for the external device to receive the ranging signal smoothly. Calculation of the spatial distance between.

Among them, in this embodiment of the present application, the target sending time may be determined through negotiation between the two parties. For example, the electronic device and the external device may first exchange time information, mutually determine their respective idle time, and determine the target sending time from the idle time. time. Among them, in the embodiment of the present application, the target sending time is located after the node time during time synchronization, that is, after the time synchronization between the electronic device and the external device, the sending of the ranging signal is performed to ensure the validity of the propagation time of the ranging signal. Obtain.

Among them, in the embodiment of the present application, by sending the time difference to the external device, after receiving the ranging signal, the external device can determine whether the ranging signal is between the electronic device and the external device according to the target sending time, the actual receiving time and the time difference. The actual propagation time between devices, to achieve rapid acquisition of the actual propagation time of the ranging signal.

103. Send the ranging signal to the external device when the target sending time is reached.

Among them, since the ranging signal is sent from the side of the electronic device, the target sending time is based on the time of the local clock of the electronic device, that is, when the local clock of the electronic device reaches the target sending time, the electronic device will measure the time. The distance signal is sent out, and the distance measurement signal is sent to the external device.

Among them, in the embodiments of the present application, the ranging signal may be sent or received through the ranging chip, that is, optionally, in some embodiments of the present application, the step of "sending to the target sending time when the The external device sends the ranging signal", including:

When the target sending time is reached, the ranging signal is sent to the ranging chip of the external device through the ranging chip of the electronic device.

The ranging chip in the electronic device can send ranging signals to the external device, and the ranging chip in the external device can receive the ranging signal sent by the ranging chip in the electronic device.

Wherein, in the embodiments of the present application, the communication chip may be different from the ranging chip. For example, in some embodiments of the present application, the types of signals sent and received by the communication chip and the ranging chip are different.

Among them, the different types of signals sent and received can clearly distinguish between time synchronization tasks and ranging tasks. For example, one type of signal is used to establish a data transmission link for time synchronization, while another type of signal is used for distance calculation. Avoid signal confusion interfering with distance measurement results.

For example, in the embodiment of the present application, the communication chip includes at least one of a Bluetooth chip, a Zigbee protocol chip, a wireless fidelity network chip, an ultra-wideband chip, or a near-field communication chip; the ranging chip includes an ultrasonic ranging chip, an electromagnetic wave At least one of a ranging chip or an audio chip. For example, a data transmission link between an electronic device and an external device is established through Bluetooth, and then the time synchronization between the electronic device and the external device is performed according to the data transmission link, and the transmission and reception of ultrasonic waves are used to realize the electronic device and the external device. Calculation of the spatial distance between. Among them, for the transmission and reception of ultrasonic signals to realize the calculation of the spatial distance between the electronic device and the external device, an ultrasonic ranging chip can be set on the electronic device and the external device to transmit and receive the ultrasonic signal.

Among them, in the embodiment of the present application, the audio chip is the audio device component that comes with the electronic device and the external device. When the audio device component can send and receive corresponding signals (such as ultrasonic signals), it can directly pass the electronic device. The audio device components on the device and the external device realize the transmission and reception of corresponding signals without additional configuration of the corresponding ranging chip.

Among them, in the embodiment of the present application, the ranging chip corresponds to the audio module. For example, in the embodiment of the present application, the audio module of the electronic device sends a ranging signal (such as an ultrasonic signal) to the external device, and the external device passes the The audio module of the external device receives the ranging signal sent by the audio module in the electronic device (for example, the ultrasonic signal sent by the corresponding electronic device).

Among them, different modules are used for the time synchronization between devices and the transmission and reception of ranging signals, and the timing of each module is affected by the timing rate of their respective local clocks, the operating environment and other factors, so that the timing time of each module is There are differences, as shown in Figure 2, for electronic devices, the local time of the communication chip in the electronic device also has timing differences with the audio time of the ranging chip in the electronic device; for external devices, the communication chip in the external device has a timing difference. There is also a timing difference with the audio time of the ranging chip in this external device.

However, in order to obtain the propagation time of the ranging signal, it is necessary to clarify the transmission time of the audio module that sends the ranging signal in the electronic device and the reception time of the ranging signal received in the external device. However, since the audio modules of the two devices are in the There is a time difference in timing. Therefore, it is necessary to remove the influence of the time difference to obtain the accurate propagation time of the ranging signal.

For example, please refer to Figure 2, since the transmission and reception of the ranging signal is completed by the audio module (corresponding ranging chip), the time difference between the electronic device and the external device is the time difference for the audio module timing However, since the communication chip is used for time synchronization in the embodiment of the present application, it is necessary to determine the difference between the electronic device and the external device according to the time difference between the two communication chips and the time difference between the communication chip and the audio module in each device. The time difference of the audio module timing, that is, optionally, in some embodiments of the present application, the step "obtaining the time difference between the electronic device and the external device" includes:

Obtain the local time difference according to the local time of the communication chip of the electronic device and the local time of the communication chip of the external device;

Obtain the first communication audio time difference according to the local time of the communication chip of the electronic device and the audio time of the ranging chip of the electronic device;

Obtain the second communication audio time difference according to the local time of the communication chip of the external device and the audio time of the ranging chip of the external device;

According to the local time difference, the first communication audio time difference and the second communication audio time difference, the time difference between the electronic device and the external device is obtained.

Wherein, in the embodiment of the present application, the local time is the timing time of the communication chip, and the audio time is the timing time of the ranging chip.

Among them, through the local time difference existing in the timing of the two communication chips, and the timing difference between the communication chip and the ranging chip in each device, the time difference between the two devices in the audio module timing can be obtained. For example, when the local time of the electronic device If the timing difference with the local time of the external device is 100ms, the timing difference between the local time in the electronic device and the audio time is 100ms, and the timing difference between the local time in the external device and the audio time is 200ms, then the audio time between the electronic device and the external device The timing difference is 400ms (ie 100ms+100ms+200ms).

104. Receive the spatial distance between the external device and the electronic device returned by the external device, where the spatial distance is determined by the external device according to the ranging signal, the target sending time, the time difference, and It is calculated by the actual receiving moment when the external device receives the ranging signal.

Among them, after receiving the ranging signal, the external device has obtained the sending time, receiving time, time difference and the type of the ranging signal. Therefore, the external device can directly The receiving time, the time difference and the ranging signal are used to calculate the spatial distance between the external device and the electronic device, so as to speed up the calculation of the spatial distance between the electronic device and the external device.

Among them, the electronic device realizes the acquisition of the spatial distance by the sender of the ranging signal by receiving the spatial distance between the external device and the electronic device returned by the external device, which facilitates the application of the spatial distance by the sender of the ranging signal. For example, in practical applications , the user can send ranging signals to the external device through the electronic device, and directly receive the spatial distance returned by the external device, so that the user can directly obtain the distance from the external device through the electronic device, and realize the remote measurement of the distance between objects. There is no need for manual on-the-spot measurement, which improves the efficiency of ranging.

Among them, in the embodiment of the present application, the time synchronization between the electronic device and the external device is performed to obtain the time difference between the electronic device and the external device, and the time difference is further utilized to realize the electronic device and the external device through one transmission and reception of the ranging signal. Compared with the related art, the present application does not require the transmission of the receiving time of the ranging signal, and the external device directly calculates the spatial distance between the place and the electronic device according to the target sending time, the actual receiving time and the time difference, reducing the number of data transmissions, It can improve the efficiency of distance measurement between devices. Among them, by sending the target sending time of the ranging signal to the external device, it is convenient for the external device to prepare for receiving the ranging signal according to the target sending time, so as to ensure the smooth sending and receiving of the ranging signal, and the smooth sending and receiving of the ranging signal. Provide a basis for accurate measurement of the distance between devices. Among them, by returning the measured spatial distance to the sender of the ranging signal, the sender of the ranging signal can obtain the spatial distance with the external device after sending the ranging signal, which is convenient for subsequent application of the spatial distance.

Please refer to FIG. 3. FIG. 3 is another schematic flowchart of a distance acquisition method provided by an embodiment of the present application. The distance acquisition method is applied to an electronic device. The process of the distance acquisition method provided by the embodiment of the present application may be as follows:

201. Perform time synchronization with an external device to obtain a time difference between the electronic device and the external device.

Among them, in the embodiment of the present application, the external device is the peer device that performs spatial distance measurement with the electronic device. Calculate.

Among them, due to the different timing rates and operating environments of the local clocks of different devices, the timing times of different devices are different, and in the embodiment of the present application, by synchronizing the time between the electronic device and the external device, it is possible to obtain the electronic device and the external device. time difference. The acquisition of the time difference can facilitate the subsequent acquisition of the actual propagation time of the ranging signal according to the time difference, thereby realizing effective measurement of the spatial distance between the electronic device and the external device.

202. Receive the target sending time of the ranging signal transmitted by the external device.

Among them, the ranging signal is a signal that can be sent and received. By sending and receiving the ranging signal by two objects respectively, the propagation time of the ranging signal between the two objects can be obtained. The propagation time between two objects can be used to calculate the distance between the two objects. For example, the propagation time of the ranging signal between the two objects and the propagation rate can be used to realize the travel distance of the ranging signal in the propagation time. , where the moving distance of the ranging signal is the spatial distance between two objects.

Among them, in the embodiment of the present application, the target sending time is the time when the ranging signal is sent. By receiving the target sending time sent by the external device before sending the ranging signal, the ranging signal can be received according to the target sending time. It is convenient to receive the ranging signal sent by the external device smoothly, and the smooth reception of the ranging signal can realize the acquisition of the receiving time of the ranging signal, and further realize the calculation of the propagation time of the ranging signal, which is convenient for The measurement of the spatial distance between subsequent electronic equipment and external equipment.

Among them, in this embodiment of the present application, the target sending time may be determined through negotiation between the two parties. For example, the electronic device and the external device may first exchange time information, mutually determine their respective idle time, and determine the target sending time from the idle time. time. Among them, in the embodiment of the present application, the target sending time is located after the node time during time synchronization, that is, after the electronic device and the external device are time synchronized, the ranging signal is sent to ensure smooth reception of the ranging signal.

203. Receive the ranging signal sent by the external device.

Wherein, by receiving the ranging signal sent by the external device, the moment when the ranging signal is received can be taken as the actual receiving moment, wherein the acquisition of the actual receiving moment is convenient for the subsequent calculation of the propagation time of the ranging signal.

Among them, since the ranging signal is received by the electronic device, the actual receiving time is based on the clock of the electronic device. Among them, considering that there is a timing difference between the electronic device and the external device, the propagation time of the ranging signal needs to be calculated according to the target sending time, the actual receiving time and the time difference of the ranging signal.

204. Calculate the spatial distance between the electronic device and the external device according to the target sending time, the time difference, the ranging signal, and the actual receiving time when the ranging signal is received, and calculate the distance between the electronic device and the external device. The spatial distance is sent to the external device.

Among them, since the electronic device has obtained the transmission time, reception time, time difference, and type of the ranging signal after receiving the ranging signal, the electronic device can directly The receiving time, the time difference and the ranging signal are used to calculate the spatial distance between the electronic device and the external device, so as to speed up the calculation of the spatial distance between the electronic device and the external device.

Among them, by returning the spatial distance between the electronic device and the external device to the external device, the external device can directly obtain the spatial distance with the electronic device after sending the ranging signal, which is convenient for the sender of the ranging signal to determine the spatial distance. Get and apply.

Among them, in this embodiment of the present application, since the ranging signal will be affected by the external environment during the propagation process, when calculating the spatial distance between the electronic device and the external device according to the propagation time and the ranging signal, the distance between the electronic device and the external device can also be calculated according to the The attenuation coefficient of the ranging signal during the propagation process is used to calculate the spatial distance, so as to improve the accuracy of the spatial distance measurement. , the ranging signal and the actual receiving moment when the ranging signal is received, and calculating the spatial distance between the electronic device and the external device", including:

determining a propagation attenuation coefficient of the ranging signal;

Calculate the spatial distance between the electronic device and the external device according to the target sending time, the time difference, the propagation attenuation coefficient, and the actual receiving time when the ranging signal is received.

Wherein, in the embodiment of the present application, the propagation attenuation coefficient can be obtained through multiple experiments. Based on different external environments, the propagation attenuation coefficient is different. The specific value and acquisition method of the propagation attenuation coefficient are not limited in the embodiment of the present application. .

Among them, in the embodiment of the present application, when calculating the spatial distance between the electronic device and the external device, the accuracy of the measurement of the spatial distance between the devices can also be improved by means of verification, that is, optionally, in this In some embodiments of the application, the step "calculates the distance between the electronic device and the external device according to the target sending time, the time difference, the ranging signal, and the actual receiving time when the ranging signal is received. the spatial distance", including:

demodulating the ranging signal to obtain device identification information;

If the device identification information is preset device identification information, according to the target sending time, the time difference, the ranging signal, and the actual receiving time when the ranging signal is received, calculate the difference between the electronic device and the device. the spatial distance between the external devices.

Wherein, by checking the device identification information in the ranging signal, it can be determined whether the sender of the ranging signal is a preset device. For example, in this embodiment of the present application, the preset device identification information is the same as the electronic device The device pre-establishes the identification information of the authorized device, and the authorization operation can ensure the reliability, security and validity of the source of the ranging signal.

Among them, in the embodiment of the present application, the counterpart device that establishes the data communication link can be set as an authorized device, and the transmitter of the ranging signal and the counterpart of the data communication link are set to be consistent, so that the transmission of the ranging signal can be ensured The validity of information such as time and time difference is conducive to the effective measurement of propagation time and spatial distance.

Among them, in the embodiment of the present application, the time synchronization between the electronic device and the external device is performed to determine the time difference between the electronic device and the external device, so as to calculate the effective time for the ranging signal to propagate between the electronic device and the external device according to the time difference, which is convenient for Subsequently, the spatial distance between the electronic device and the external device is calculated according to the effective propagation time. Among them, by returning the calculated spatial distance to the external device, the external device that sends the ranging signal can directly obtain the spatial distance between the electronic device and the external device after sending the ranging signal, which facilitates the acquisition of the spatial distance and application.

Please refer to FIG. 4 . FIG. 4 is a schematic diagram of a specific flow of time synchronization between devices and ranging between devices provided by an embodiment of the present application. The specific process of time synchronization between devices and ranging between devices is as follows :

301. First establish a connection between the electronic device and the external device through Bluetooth; wherein, the Bluetooth connection method may include traditional Bluetooth (classic BT) or low-power Bluetooth (BLE);

302, align the Bluetooth local clock (RTC, real time clock) of electronic equipment and external equipment by the time synchronization mechanism of bluetooth link layer (linklayer), obtain the time difference of electronic equipment bluetooth local time and external equipment bluetooth local time;

303. For the electronic device, realize the microsecond (us)-level time synchronization between the Bluetooth local time in the electronic device and the audio local time through a soft bus or a hard bus, and obtain the time difference between the Bluetooth local time and the audio local time in the electronic device; the same to get the time difference between the Bluetooth local time and the audio local time in the external device;

304. Obtain the time difference between the other party's Bluetooth local time and the audio local time through Bluetooth, according to the time difference between the Bluetooth local time of the electronic device and the external device, the time difference between the Bluetooth local time and the audio time in the electronic device, and the Bluetooth local time and the audio local time in the external device. The time difference of time, the audio time difference between the electronic device and the external device is obtained, and the audio time difference is the time difference (synchronization time parameter) Tsys between the electronic device and the external device;

305. The electronic device issues an instruction to send a data packet to an external device through Bluetooth, wherein the data packet contains instruction information and time information TS1 of ultrasonic transmission;

306. When receiving the data packet, the external device parses the data packet to obtain the instruction information and the transmission time information TS1 of the ultrasonic wave, and triggers the ultrasonic wave receiving instruction according to the transmission time TS1 of the ultrasonic wave, and starts to receive the ultrasonic wave signal;

307. When the ultrasonic transmission time TS1 is reached, the electronic device sends an ultrasonic signal to the external device, and modulates the Bluetooth address information or device identification information of the electronic device through the ultrasonic wave;

308. When the external device receives the ultrasonic signal, record the reception time TS2 of the received ultrasonic signal, and demodulate the ultrasonic signal to obtain the Bluetooth address information or device identification information of the electronic device;

309. When the Bluetooth address information or device identification information obtained by the external device demodulating the ultrasonic signal is consistent with the Bluetooth address information or device identification information of the electronic device (electronic device establishing a Bluetooth connection), according to the transmission time TS1 of the ultrasonic signal and the ultrasonic signal The receiving time TS2 and the time difference Tsys calculate the spatial distance between the electronic device and the external device;

310. The external device sends the spatial distance from the electronic device to the electronic device.

Wherein, in the embodiment of the present application, the spatial distance L between the electronic device and the external device can be calculated by the following formula, which specifically includes:

L=340*K*(TS2-TS1+Tsys)

Among them, K is the propagation factor of the speed of sound affected by external factors, that is, the propagation attenuation coefficient of the ultrasonic wave when it propagates between the electronic device and the external device; Tsys is the synchronization time parameter of the audio time of the electronic device and the external device.

Among them, through the establishment of the Bluetooth link between the electronic device and the external device, the Bluetooth local time and the audio local time can be exchanged according to the Bluetooth link, and the time synchronization between the electronic device and the external device can be further realized. The electronic equipment and external equipment can realize the effective acquisition of the propagation time of the ranging signal between the electronic equipment and the external equipment, and the acquisition of the propagation time of the ranging signal can realize the measurement of the spatial distance between the electronic equipment and the external equipment.

Please refer to FIG. 5. FIG. 5 is a schematic flowchart of data transmission in a distance acquisition process provided by an embodiment of the present application, wherein the data transmission process in the distance acquisition process includes the following:

401. The electronic device sends a Bluetooth connection request to an external device;

402. The external device establishes a Bluetooth connection link with the electronic device based on the Bluetooth connection request;

403. The electronic device sends the local Bluetooth time of the electronic device to the external device through the Bluetooth connection link;

404. After receiving the local Bluetooth time of the electronic device sent by the electronic device, the external device sends the local Bluetooth time of the external device to the electronic device;

405. The electronic device sends the local audio time of the electronic device to the external device through the Bluetooth connection link;

406. After receiving the local audio time of the electronic device sent by the electronic device, the external device sends the local audio time of the external device to the electronic device; and according to the Bluetooth local time and audio local time of the electronic device and the Bluetooth local time and audio local time of the external device Calculate the audio time difference between the external device and the electronic device (that is, the time difference Tsys);

407. The target sending time TS1 when the electronic device sends the ranging signal to the external device; the external device makes preparations for receiving the ultrasonic signal after receiving the target sending time; the electronic device makes preparations for transmitting the ultrasonic signal;

408. After reaching the target sending time TS1 after a period of time, the electronic device sends an ultrasonic signal to the external device;

409. The external device receives the ultrasonic signal, and analyzes the ultrasonic signal to obtain the device identification information;

410, when the device identification information is consistent with the device identification of the electronic device, calculate the spatial distance between the external device and the electronic device according to the target sending time TS1, the ultrasonic receiving time TS2 and the time difference Tsys;

411. The external device sends the spatial distance from the electronic device to the electronic device.

Among them, through the establishment of the Bluetooth connection link between the electronic device and the external device, it is convenient to send or exchange the Bluetooth local time and the audio local time between the electronic device and the external device, and the Bluetooth local time and audio between the electronic device and the external device are facilitated. The exchange of local time can calculate the time difference between the electronic device and the external device, which is convenient for the accurate calculation of the propagation time of the ranging signal. Among them, after receiving the ranging signal, the external device directly calculates the spatial distance with the electronic device according to the sending time, receiving time and time difference of the ranging signal, so as to realize the fast calculation of the spatial distance. Among them, the external device calculates the spatial distance The calculation of the spatial distance on the side of the electronic device can be avoided, and accordingly, the transmission of the ranging signal to the electronic device at the time of receiving can be avoided, the number of information transmissions can be reduced, and the calculation efficiency of the spatial distance can be improved. Among them, by returning the spatial distance to the electronic device, the sender of the ranging signal can directly obtain the spatial distance after sending the ranging signal, which is convenient for the application of the spatial distance. The method also avoids manual on-site measurement and improves the efficiency of distance measurement.

In order to better implement the distance acquisition method of the present application, the present application further provides a distance acquisition system based on the above distance acquisition method. Wherein, the meanings of the words in the distance acquisition device are the same as those in the above distance acquisition method, and the specific implementation details may refer to the descriptions in the method embodiments.

Please refer to FIG. 6. FIG. 6 is a schematic structural diagram of a distance acquisition system provided by the present application, wherein the distance acquisition system may include:

The electronic device 501 is configured to perform time synchronization with the external device, obtain the time difference between the electronic device and the external device, and transmit the target sending time of the ranging signal and the time difference to the external device, in Sending the ranging signal to the external device when reaching the target sending time, and receiving the spatial distance between the external device and the electronic device returned by the external device;

The external device 502 is configured to receive the ranging signal and the time difference sent by the electronic device, and according to the target sending time, the time difference, the ranging signal and the actual receiving time when the ranging signal is received, Calculate the spatial distance between the external device and the electronic device, and send the spatial distance to the electronic device.

In order to better implement the distance acquisition method of the present application, the present application further provides a distance acquisition device based on the above distance acquisition method. Wherein, the meanings of the words in the distance obtaining device are the same as those in the above distance obtaining method, and the specific implementation details may refer to the description in the method embodiment.

Please refer to FIG. 7. FIG. 7 is a schematic structural diagram of a distance acquisition device provided by an embodiment of the present application, wherein the distance acquisition device is applied to an electronic device, and the distance acquisition device may include:

an acquisition module 601, configured to perform time synchronization with an external device to obtain a time difference between the electronic device and the external device;

a time information transmission module 602, configured to transmit the target sending time of the ranging signal and the time difference to the external device;

A ranging signal sending module 603, configured to send the ranging signal to the external device when the target sending time is reached;

Spatial distance receiving module 604, configured to receive the spatial distance between the external device and the electronic device returned by the external device, where the spatial distance is sent by the external device according to the ranging signal and the target It is calculated from the time, the time difference, and the actual receiving time when the external device receives the ranging signal.

Optionally, in an embodiment of the present application, the obtaining module 601 includes:

a link unit, configured to establish a data transmission link with the communication chip of the external device through the communication chip of the electronic device;

A synchronization unit, configured to perform time synchronization with the external device through the data transmission link.

Optionally, in an embodiment of the present application, the ranging signal sending module 603 includes:

A ranging signal sending unit, configured to send the ranging signal to the ranging chip of the external device through the ranging chip of the electronic device when the target sending time is reached; wherein the communication chip is connected to the ranging chip of the external device. The types of signals sent and received by the ranging chip are different.

Optionally, in some embodiments of the present application, the communication chip includes at least one of a Bluetooth chip, a Zigbee protocol chip, a wireless fidelity network chip, an ultra-wideband chip, or a near field communication chip, and the ranging chip The chip includes at least one of an ultrasonic ranging chip, an electromagnetic wave ranging chip or an audio chip.

Optionally, in some embodiments of the present application, the obtaining module 601 includes:

a first obtaining unit, configured to obtain the local time difference according to the local time of the communication chip of the electronic device and the local time of the communication chip of the external device;

a second obtaining unit, configured to obtain the first communication audio time difference according to the local time of the communication chip of the electronic device and the audio time of the ranging chip of the electronic device;

a third obtaining unit, configured to obtain the second communication audio time difference according to the local time of the communication chip of the external device and the audio time of the ranging chip of the external device;

The fourth obtaining unit is configured to obtain the time difference between the electronic device and the external device according to the local time difference, the first communication audio time difference and the second communication audio time difference.

Please refer to FIG. 8. FIG. 8 is another schematic structural diagram of a distance acquisition device provided by an embodiment of the present application, wherein the distance acquisition device is applied to an electronic device, and the distance acquisition device may include:

a synchronization module 701, configured to perform time synchronization with an external device to obtain a time difference between the electronic device and the external device;

A time information receiving module 702, configured to receive the target sending time of the ranging signal transmitted by the external device;

A ranging signal receiving module 703, configured to receive the ranging signal sent by the external device;

The spatial distance sending module 704 is configured to calculate the distance between the electronic device and the external device according to the target sending time, the time difference, the ranging signal and the actual receiving time when the ranging signal is received. space distance, and send the space distance to the external device.

Optionally, in some embodiments of the present application, the spatial distance sending module 704 includes:

a determining unit, configured to determine the propagation attenuation coefficient of the ranging signal;

The first calculation unit is configured to calculate the spatial distance between the electronic device and the external device according to the target sending time, the time difference, the propagation attenuation coefficient, and the actual receiving time when the ranging signal is received.

Optionally, in some embodiments of the present application, the spatial distance sending module 704 further includes:

a demodulation unit, configured to demodulate the ranging signal to obtain device identification information;

The second calculation unit is configured to, if the device identification information is preset device identification information, according to the target sending time, the time difference, the ranging signal and the actual receiving time of the ranging signal, A spatial distance between the electronic device and the external device is calculated.

It should be noted that the distance acquisition device provided in the embodiment of the present application and the distance acquisition method in the above embodiments belong to the same concept, and the specific implementation process thereof is detailed in the above related embodiments, which will not be repeated here.

The embodiments of the present application provide a storage medium on which a computer program is stored. When the stored computer program is executed on the processor of the electronic device provided by the embodiment of the present application, the processor of the electronic device can execute any one of the above suitable programs. Steps in a method for obtaining a distance from an electronic device. The storage medium may be a magnetic disk, an optical disk, a read only memory (Read Only Memory, ROM), or a random access device (Random Access Memory, RAM), or the like.

An embodiment of the present application further provides an electronic device. Referring to FIG. 9 , the electronic device 800 includes a processor 810 and a memory 820 .

The processor 810 in this embodiment of the present application may be a general-purpose processor, such as a processor of an ARM architecture.

A computer program is stored in the memory 820, which may be a high-speed random access memory, or a non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid-state storage devices. Accordingly, memory 820 may also include a memory controller to provide processor 810 access to memory 820 . The processor 810 is configured to execute any of the above distance acquisition methods by executing the computer program in the memory 820, such as:

Perform time synchronization with an external device to obtain the time difference between the electronic device and the external device;

The target sending time and the time difference for transmitting the ranging signal to the external device;

Send the ranging signal to the external device when the target sending time is reached;

receiving the spatial distance between the external device and the electronic device returned by the external device, the spatial distance is determined by the external device according to the ranging signal, the target sending time, the time difference and the It is calculated by the actual receiving moment when the external device receives the ranging signal.

The method, device, system, storage medium and electronic device for distance acquisition provided by the present application have been described in detail above. The principles and implementations of the present application are described with specific examples. The descriptions of the above embodiments are only It is used to help understand the method and the core idea of the present application; meanwhile, for those skilled in the art, according to the idea of the present application, there will be changes in the specific implementation and application scope. In summary, this specification The content should not be construed as a limitation on this application.

Claims (12)

1. A distance acquisition method is applied to electronic equipment and is characterized by comprising the following steps:

carrying out time synchronization with external equipment to obtain a time difference between the electronic equipment and the external equipment;

transmitting the target sending time of the ranging signal and the time difference to the external equipment;

transmitting the ranging signal to the external device when the target transmission time is reached;

and receiving a space distance between the external equipment and the electronic equipment, wherein the space distance is obtained by the external equipment through calculation according to the ranging signal, the target sending time, the time difference and the actual receiving time of the ranging signal received by the external equipment.

2. The distance acquisition method according to claim 1, wherein said time-synchronizing with the external device comprises:

establishing a data transmission link with a communication chip of the external device through the communication chip of the electronic device;

time synchronization is carried out with the external equipment through the data transmission link;

the sending the ranging signal to the external device when the target sending time is reached includes:

when the target sending time is reached, sending the ranging signal to a ranging chip of the external equipment through the ranging chip of the electronic equipment;

the communication chip and the ranging chip send and receive signals of different types.

3. The distance obtaining method according to claim 2, wherein the communication chip comprises at least one of a bluetooth chip, a zigbee protocol chip, a wireless fidelity network chip, an ultra-wideband chip, or a near field communication chip, and the distance measuring chip comprises at least one of an ultrasonic distance measuring chip, an electromagnetic wave distance measuring chip, or an audio chip.

4. The distance acquisition method according to claim 2, wherein said obtaining a time difference between the electronic device and the external device comprises:

obtaining a local time difference according to the local time of the communication chip of the electronic equipment and the local time of the communication chip of the external equipment;

obtaining a first communication audio time difference according to the local time of a communication chip of the electronic equipment and the audio time of a distance measuring chip of the electronic equipment;

obtaining a second communication audio time difference according to the local time of the communication chip of the external equipment and the audio time of the ranging chip of the external equipment;

and obtaining the time difference between the electronic equipment and the external equipment according to the local time difference, the first communication audio time difference and the second communication audio time difference.

5. A distance acquisition method is applied to electronic equipment and is characterized by comprising the following steps:

carrying out time synchronization with external equipment to obtain a time difference between the electronic equipment and the external equipment;

receiving the target sending time of the ranging signal transmitted by the external equipment;

receiving the ranging signal sent by the external equipment;

and calculating the space distance between the electronic equipment and the external equipment according to the target sending time, the time difference, the ranging signal and the actual receiving time of receiving the ranging signal, and sending the space distance to the external equipment.

6. The method according to claim 5, wherein the calculating a spatial distance between the electronic device and the external device according to the target transmission time, the time difference, the ranging signal, and an actual reception time at which the ranging signal is received comprises:

determining a propagation attenuation coefficient of the ranging signal;

and calculating the space distance between the electronic equipment and the external equipment according to the target sending time, the time difference, the propagation attenuation coefficient and the actual receiving time of the received ranging signal.

7. The method according to claim 5, wherein the calculating a spatial distance between the electronic device and the external device according to the target transmission time, the time difference, the ranging signal, and an actual reception time at which the ranging signal is received comprises:

demodulating the ranging signal to obtain equipment identification information;

if the equipment identification information is preset equipment identification information, calculating the spatial distance between the electronic equipment and the external equipment according to the target sending time, the time difference, the ranging signal and the actual receiving time of the ranging signal.

8. A distance obtaining system comprises an electronic device and an external device, and is characterized in that the electronic device is used for carrying out time synchronization with the external device to obtain a time difference between the electronic device and the external device, transmitting a target sending time of a ranging signal and the time difference to the external device, sending the ranging signal to the external device when the target sending time is reached, and receiving a space distance between the external device and the electronic device, wherein the space distance is returned by the external device;

the external device is used for receiving the ranging signal sent by the electronic device and the time difference, calculating a spatial distance between the external device and the electronic device according to the target sending time, the time difference, the ranging signal and the actual receiving time of the ranging signal, and sending the spatial distance to the electronic device.

9. A distance acquisition device is applied to electronic equipment and is characterized by comprising:

the acquisition module is used for carrying out time synchronization with external equipment to obtain a time difference between the electronic equipment and the external equipment;

the time information transmission module is used for transmitting the target sending time of the ranging signal and the time difference to the external equipment;

the ranging signal sending module is used for sending the ranging signal to the external equipment when the target sending time is reached;

and the spatial distance receiving module is used for receiving a spatial distance between the external equipment and the electronic equipment, wherein the spatial distance is obtained by the external equipment through calculation according to the ranging signal, the target sending time, the time difference and the actual receiving time when the external equipment receives the ranging signal.

10. A distance acquisition device is applied to electronic equipment and is characterized by comprising:

the synchronization module is used for carrying out time synchronization with external equipment to obtain a time difference between the electronic equipment and the external equipment;

the time information receiving module is used for receiving the target sending time of the ranging signal transmitted by the external equipment;

the ranging signal receiving module is used for receiving the ranging signal sent by the external equipment;

and the space distance sending module is used for calculating the space distance between the electronic equipment and the external equipment according to the target sending time, the time difference, the ranging signal and the actual receiving time of the ranging signal, and sending the space distance to the external equipment.

11. A storage medium having stored thereon a computer program for performing the steps of the distance acquisition method according to any one of claims 1-7 when the computer program is loaded by a processor of an electronic device.

12. An electronic device comprising a processor and a memory, said memory storing a computer program, wherein said processor performs the steps in the distance acquisition method according to any one of claims 1-4 or 5-7 by loading said computer program.

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