Distance measuring device and distance measuring system

Abstract

The utility model discloses distance measuring equipment and a distance measuring system, and the distance measuring equipment comprises a plurality of antenna assemblies; the phase shifting devices are correspondingly connected with the antenna assemblies, and the phase shifting devices are configured to respond to UWB tag signals and adjust the phases of the antenna assemblies so as to obtain distance measurement values of different angles. The ranging device can automatically adjust the phase of the antenna assembly according to different angles, increase the directionality of the antenna assembly, and enhance UWB tag signals, so that other signal interference in the environment can be eliminated, and the ranging accuracy is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of distance measurement, in particular to a distance measurement device and a distance measurement system. Background Art

[0002] UWB (Ultra-Wideband) refers to radio technology that uses a frequency band of 500 MHz or higher, or a technology with a fractional bandwidth of 25% or higher. Fractional bandwidth refers to the ratio of the signal's bandwidth to its center frequency. UWB is a radio technology that uses wideband frequencies and offers advantages such as high range resolution, excellent penetration, strong immunity to narrowband noise, and coexistence with other devices sharing the same frequency.

[0003] In related technologies, when a ranging device is performing ranging, the received UWB tag signal may be interfered with by other signals in the environment, resulting in low ranging accuracy. Utility Model Content

[0004] The present invention aims to address, at least to some extent, one of the technical problems in the related art. To this end, the first object of the present invention is to provide a ranging device that automatically adjusts the phase of an antenna assembly according to different angles, thereby increasing the antenna assembly's directivity and enhancing the UWB tag signal. This eliminates interference from other signals in the environment and improves ranging accuracy.

[0005] The second purpose of the present invention is to provide a distance measurement system.

[0006] To achieve the above-mentioned objectives, an embodiment of the first aspect of the present invention proposes a ranging device, comprising: multiple antenna assemblies; a phase shifting device corresponding to each of the antenna assemblies, wherein the phase shifting device is configured to respond to a UWB tag signal and adjust the phase of the antenna assembly to obtain ranging values ​​at different angles.

[0007] According to the ranging device of the present invention, when measuring the distance of a UWB tag, a phase shifter can respond to the UWB tag signal and adjust the phase of the corresponding antenna assembly to obtain ranging values ​​at different angles. As a result, the device can automatically adjust the phase of the antenna assembly according to different angles, increasing the antenna assembly's directivity and enhancing the UWB tag signal, thereby eliminating interference from other signals in the environment and improving ranging accuracy.

[0008] In addition, the distance measuring device according to the above embodiment of the present invention may also have the following additional technical features:

[0009] Specifically, the phase shifting device is further configured to scan the UWB tag signal in the range of 0-180° according to a preset step.

[0010] Specifically, the phase shifting device includes: a phase shifter, and the phase shifter is connected to the antenna assembly in a one-to-one correspondence.

[0011] Specifically, the above-mentioned ranging device also includes: a controller, which is respectively connected to each of the phase shifters and is configured to determine a target ranging value according to the phase difference of each of the antenna components, and determine the position of the UWB tag according to the target ranging value.

[0012] Specifically, the phase shifting device includes: a control chip, and the control chip is connected to the antenna assembly in a one-to-one correspondence.

[0013] Specifically, the multiple control chips are communicatively connected with each other.

[0014] Specifically, one of the multiple control chips is used as a main control chip, and the main control chip is configured to determine a target ranging value according to the phase difference of each antenna component, and determine the position of the UWB tag according to the target ranging value.

[0015] To achieve the above-mentioned purpose, a second embodiment of the present invention provides a ranging system, comprising the above-mentioned ranging device and a vehicle.

[0016] Specifically, the above-mentioned ranging system further includes: a plurality of anchor points, and each anchor point is correspondingly provided with one of the ranging devices.

[0017] According to the distance measurement system of the embodiment of the present invention, the distance measurement device described above can eliminate interference from other signals in the environment and improve the accuracy of distance measurement.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description and in part will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a block diagram of a distance measuring device according to an embodiment of the present utility model;

[0020] Figure 2 1 is a block diagram of a distance measuring device according to an embodiment of the present invention;

[0021] Figure 3 1 is a block diagram of a distance measuring device according to an embodiment of the present invention;

[0022] Figure 4 is a block diagram of a distance measuring device according to another embodiment of the present invention;

[0023] Figure 51 is a block diagram of a distance measuring device according to an embodiment of the present invention;

[0024] Figure 6 Schematic diagram of a distance measurement system according to an embodiment of the present invention. DETAILED DESCRIPTION

[0025] The following describes in detail embodiments of the present invention, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention, and should not be construed as limiting the present invention.

[0026] The distance measuring device and the distance measuring system provided in the embodiments of the present invention will be described below with reference to the accompanying drawings.

[0027] Figure 1 Schematic diagram of a distance measuring device according to an embodiment of the present invention.

[0028] like Figure 1 As shown, the ranging device 100 of an embodiment of the present invention includes: multiple antenna components 110; a phase shifter 120 correspondingly connected to each antenna component 110, and the phase shifter 120 is configured to respond to the UWB tag signal and adjust the phase of the antenna component 110 to obtain ranging values ​​at different angles.

[0029] Specifically, when measuring the distance of a device equipped with a UWB tag (such as a UWB car key, etc.), at a certain angle, the phase shifter 120 receives the UWB tag signal and adjusts the phase of each antenna component 110 based on the received UWB tag signal, so that the phase of the waveform corresponding to the UWB tag signal received by each antenna component 110 is the same. The UWB tag signals received by each antenna component 110 with the same waveform phase are superimposed on each other, which can enhance the UWB tag signal. The phase shifter 120 can calculate the ranging value at this angle based on the UWB tag signal. The phase shifter 120 then changes the scanning angle of the UWB tag signal and adjusts the phase of each antenna component 110 based on the received UWB tag signal to obtain the ranging value at this angle. Similarly, the ranging device 100 can obtain ranging values ​​at different angles.

[0030] For example, Figure 2As shown, there are three antenna assemblies 110, which are arranged from left to right. The UWB tag is on the right side of the ranging device 100. The waveform of the UWB tag signal is a sine wave. When the transmission path of the UWB tag signal is a direct path, if the phase shifter 120 does not adjust the phase of the antenna assembly 110, the antenna assembly 110 on the left receives the UWB tag signal the latest, while the antenna assembly 110 on the right receives the UWB tag signal the earliest. The phases of the waveforms corresponding to the UWB tag signals received by the three antenna assemblies 110 are different, thereby weakening the strength of the received UWB tag signal, which in turn causes the UWB tag signal strength to be confused with other signals in the environment, making it impossible to obtain an accurate ranging value. In this embodiment, the phase shifter 120 corresponding to the antenna assembly 110 on the left can advance its phase by a certain value, and the phase shifter 120 corresponding to the antenna assembly 110 on the right can delay its phase by a certain value. The phase shifter 120 corresponding to the antenna assembly 110 in the middle does not adjust its phase value, so that the phases of the waveforms corresponding to the UWB tag signals received by the three antenna assemblies 110 are the same, thereby enhancing the UWB tag signal. The phase shifter 120 can calculate the ranging value at this angle based on the UWB tag signal. When the transmission path of the UWB tag signal is Figure 2 In the reflection path shown, the phase shifter 120 can adjust the phase of the antenna assembly 110 according to the angle at that time to obtain the ranging value at that angle. Therefore, the phase shifter 120 can obtain ranging values ​​at different angles by adjusting the phase of the antenna assembly 110.

[0031] According to an embodiment of the present invention, the phase shifting device 120 is further configured to scan the UWB tag signal in the range of 0-180° according to a preset step.

[0032] In other words, the phase shifter 120 can start at 0° and step by a certain angle (e.g., 5°) to complete the scanning of the UWB tag signal within a range of 180°. Based on the UWB tag signal received at the corresponding angle, the phase of the antenna assembly 110 is adjusted, thereby obtaining different ranging values ​​at different angles. This can reduce the number of ranging measurements, save the time spent on ranging, and improve ranging efficiency.

[0033] According to one embodiment of the present invention, Figure 3 As shown, the phase shifting device 120 includes: a phase shifter 121, and the phase shifter 121 is connected to the antenna assembly 110 in a one-to-one correspondence.

[0034] That is, the phase shifter 121 can respond to the UWB tag signal and obtain ranging values ​​at different angles by adjusting the phase of the corresponding antenna assembly 110 .

[0035] Furthermore, according to one embodiment of the present invention, Figure 3 As shown, the ranging device 100 further includes a controller 130, which is connected to each phase shifter 121 and configured to determine a target ranging value based on the phase difference of each antenna assembly 110, and to determine the location of the UWB tag based on the target ranging value. The controller 130 may be a UWB chip.

[0036] Specifically, each phase shifter 121 transmits the phase difference of the UWB tag signal received by its corresponding antenna assembly 110 at the current angle to the controller 130. The controller 130 can calculate the target ranging value corresponding to the current angle based on the phase difference of each antenna assembly 110. The controller 130 selects the smallest target ranging value from the target ranging values ​​corresponding to multiple angles as the ranging value of the direct path, thereby determining the location of the UWB tag. This eliminates the interference of the reflected path on the direct path ranging accuracy, thereby improving the UWB ranging accuracy.

[0037] According to another embodiment of the present invention, Figure 4 As shown, the phase shifting device 120 includes a control chip 122, which is connected to the antenna assembly 110 in a one-to-one correspondence. The control chip 122 can be a UWB chip.

[0038] That is, the control chip 122 can respond to the UWB tag signal and obtain ranging values ​​at different angles by adjusting the phase of the corresponding antenna component 110 .

[0039] According to an embodiment of the present invention, the plurality of control chips 122 are communicatively connected to each other, that is, data can be transmitted between the plurality of control chips 122 .

[0040] According to one embodiment of the present invention, one of the multiple control chips 122 is used as a main control chip, and the main control chip is configured to determine a target ranging value according to the phase difference of each antenna component 110, and determine the location of the UWB tag according to the target ranging value.

[0041] For example, if Figure 5As shown, there are three antenna assemblies 110, arranged from left to right. The control chip 122 corresponding to the middle antenna assembly 110 can be used as the main control chip. The control chips 122 corresponding to the antenna assemblies 110 on both sides can transmit the phase difference of the UWB tag signal received by its corresponding antenna assembly 110 at the current angle to the main control chip. The main control chip can calculate the target ranging value corresponding to the current angle based on the phase difference of each antenna assembly 110. The main control chip selects the smallest target ranging value from the target ranging values ​​corresponding to multiple angles as the ranging value of the direct path, thereby determining the location of the UWB tag. In this way, the interference of the reflection path on the direct path ranging accuracy can be eliminated, thereby improving the UWB ranging accuracy.

[0042] In summary, the ranging device according to the embodiment of the present invention can, when measuring the distance of a UWB tag, respond to the UWB tag signal through a phase shifting device, adjusting the phase of the corresponding antenna assembly, and obtaining ranging values ​​at different angles. As a result, the device can automatically adjust the phase of the antenna assembly according to different angles, increasing the antenna assembly's directivity and enhancing the UWB tag signal, thereby eliminating interference from other signals in the environment and improving ranging accuracy.

[0043] Corresponding to the above embodiment, the present utility model also proposes a distance measurement system.

[0044] like Figure 6 As shown, the ranging system 200 according to the embodiment of the present invention includes the aforementioned ranging device 100 and a vehicle 210 .

[0045] According to the distance measurement system of the embodiment of the present invention, the distance measurement device described above can eliminate interference from other signals in the environment and improve the accuracy of distance measurement.

[0046] Furthermore, according to an embodiment of the present invention, the distance measurement system 200 further includes: a plurality of anchor points, each anchor point being provided with a corresponding distance measurement device 100 .

[0047] For example, the ranging system 200 can be configured with five anchor points, one of which is located in the middle of the vehicle 210, and the remaining four at the four corners of the vehicle 210. Each anchor point corresponds to a ranging device 100. Each ranging device 100 receives a UWB tag signal from a key UWB tag and calculates the tag's position based on the signal. Multiple anchor points and corresponding ranging devices 100 can improve the accuracy of UWB key positioning.

[0048] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0049] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0050] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0051] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations on the present invention. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A distance measuring device, characterized in that: include: multiple antenna assemblies; A phase shifting device is connected to each antenna assembly, and the phase shifting device is configured to respond to the UWB tag signal and adjust the phase of the antenna assembly to obtain ranging values ​​at different angles.

2. The distance measuring device according to claim 1, characterized in that The phase shifting device is further configured to scan the UWB tag signal in the range of 0-180° according to a preset step.

3. The distance measuring device according to claim 1, wherein: The phase shifting device includes: a phase shifter, and the phase shifter is connected to the antenna assembly in a one-to-one correspondence.

4. The distance measuring device according to claim 3, characterized in that Also includes: A controller is connected to each phase shifter, and is configured to determine a target ranging value according to the phase difference of each antenna assembly, and determine the position of the UWB tag according to the target ranging value.

5. The distance measuring device according to claim 1, characterized in that The phase shifting device includes a control chip, and the control chip is connected to the antenna components in a one-to-one correspondence.

6. The distance measuring device according to claim 5, characterized in that The multiple control chips are communicatively connected with each other.

7. The distance measuring device according to claim 6, characterized in that One of the multiple control chips is used as a main control chip, and the main control chip is configured to determine a target ranging value according to the phase difference of each antenna component, and determine the position of the UWB tag according to the target ranging value.

8. A ranging system, characterized in that: The device comprises the distance measuring device and the vehicle according to any one of claims 1 to 7.

9. The distance measurement system according to claim 8, characterized in that: Also includes: There are multiple anchor points, and each anchor point is correspondingly provided with one of the distance measuring devices.

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