Indoor positioning terminal based on 5G signal

Abstract

The utility model relates to the technical field of indoor positioning equipment, in particular to an indoor positioning terminal based on 5G signals, which is characterized in that an ultra-low power consumption MCU of the terminal performs data interaction with a three-axis sensor and a 5G positioning chip, and the 5G positioning chip is connected with a base station of an operator network through a 5G signal transceiving unit; a first load switch is arranged on a power supply line of the 5G positioning chip, and the ultra-low power consumption MCU is connected with the control end of the first load switch; when the three-axis sensor detects movement, the ultra-low power consumption MCU is triggered to exit the ultra-low power consumption mode, meanwhile, the first load switch is switched on to power on the 5G positioning chip, the 5G positioning chip performs data interaction with the base station through the 5G signal receiving and transmitting unit after being powered on, and the base station performs data interaction with the server through an operator network; and in a certain time, when the three-axis sensor does not detect motion, the ultra-low power consumption MCU enters an ultra-low power consumption mode to disconnect the first load switch, so that the 5G positioning chip is powered off.

Description

Technical Field

[0001] The utility model relates to the technical field of indoor positioning equipment, and specifically to an indoor positioning terminal based on 5G signals. Background Art

[0002] Indoor positioning is widely used in personnel management, material management, and equipment management in smart factories, smart mines, public facilities, and other places. Currently, there are mainly indoor positioning technologies such as Bluetooth AOA (Angle of Arrival) and UWB (Ultra WideBand). This type of positioning technology requires the deployment of beacons, and there are problems such as complex construction and long debugging time, which affects the efficiency of equipment deployment and normal production. In addition, this type of positioning system is usually developed based on privatized protocols, and the cost of docking with the owner's original system is high, which brings instability to subsequent maintenance and updates. Summary of the invention

[0003] The purpose of the utility model is to overcome the shortcomings of the above-mentioned background technology and provide an indoor positioning terminal based on 5G signals, which can effectively reduce the construction difficulty and cost and ensure the normal operation of the owner's production business.

[0004] The technical solution adopted by the utility model is as follows:

[0005] A 5G signal-based indoor positioning terminal comprises a 5G positioning chip, an ultra-low power MCU, a three-axis sensor and a battery pack for powering the three. The ultra-low power MCU is connected to the three-axis sensor and the 5G positioning chip and performs data exchange. The 5G positioning chip is connected to a base station of an operator network through a 5G signal transceiver unit. A first load switch is provided on the power supply line of the 5G positioning chip, and the ultra-low power MCU is connected to a control end of the first load switch. The three-axis sensor sends a signal when detecting motion, and the ultra-low power MCU exits the ultra-low power mode after receiving the signal, and at the same time, the first load switch is turned on through the control end to power on the 5G positioning chip. After the 5G positioning chip is powered on, data is exchanged with the base station through the 5G signal transceiver unit, and the base station performs data exchange with a server through the operator network. Within a certain period of time, when the three-axis sensor does not detect motion, the ultra-low power MCU enters the ultra-low power mode, and at the same time, the first load switch is disconnected through the control end to power off the 5G positioning chip.

[0006] In a further solution, the 5G signal transceiver unit includes at least one group of transceiver links, each group has a 5G signal sending link and a 5G signal receiving link, one end of the 5G signal sending link and the 5G signal receiving link are connected to the 5G positioning chip, and the other end are connected to the RF switch, and different links are connected to the antenna by switching the RF switch.

[0007] In a further solution, a power amplifier and a filter are provided on the 5G signal transmission link; a filter and a low-noise amplifier are provided on the 5G signal receiving link.

[0008] In a further solution, an impedance matching circuit is provided between the radio frequency switch and the antenna.

[0009] In a further scheme, the battery pack is provided with a power management module, which includes a charging and debugging interface, a charging chip, a second load switch and a power regulator; the charging and debugging interface is connected to the input side of the charging chip, and the output side of the charging chip is connected to the battery pack and the control end of the second load switch. The battery pack supplies power to the 5G positioning chip, the ultra-low power consumption MCU and the three-axis sensor through the second load switch and the power regulator. The first load switch is arranged on the power supply line between the power regulator and the 5G positioning chip; when the output side of the charging chip outputs voltage to charge the battery pack, the charging chip disconnects the second load switch through the control end, and when the output side of the charging chip does not output voltage, the charging chip connects the second load switch through the control end.

[0010] In a further solution, the charging debugging interface is also connected to the debugging interface of the 5G positioning chip.

[0011] In a further solution, the ultra-low power MCU is connected to a voltage sampling circuit, a sampling end of the voltage sampling circuit is connected to the battery pack, and the ultra-low power MCU samples the voltage of the battery pack through the voltage sampling circuit after exiting the ultra-low power mode.

[0012] In a further solution, the ultra-low power consumption MCU is connected to the three-axis sensor via an IIC bus and performs data exchange.

[0013] In a further solution, the ultra-low power consumption MCU is connected to the 5G positioning chip via a UART bus and performs data exchange.

[0014] In a further solution, the 5G positioning chip is a 5G positioning chip of 3GPP Release 17 version.

[0015] The utility model has the following beneficial effects:

[0016] 1. The utility model can achieve docking with the operator's existing cellular private network through the 5G positioning chip of the 3GPP Release 17 protocol version, reuse the existing network, achieve low-cost deployment, and enjoy the operator's telecommunications-level services, ensure the normal operation of the equipment, reduce the network failure rate, and thus reduce the subsequent maintenance expenses;

[0017] 2. The utility model uses an ultra-low power consumption chip to control the power on and off of the 5G positioning chip, so that the overall power consumption of the indoor positioning terminal can fully meet the needs of the positioning system. Under the condition of overall low power consumption, the capacity and volume of the battery can be reduced, so that the volume of the indoor positioning terminal can also be made relatively small, which is convenient for construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Schematic diagram of the system structure of an embodiment of the utility model.

[0019] The figure includes: three-axis sensor U1, ultra-low power MCU U2, 5G positioning chip U3, power regulator U4, first load switch U5, second load switch U6, charging chip U7, Phase 5N MMMB PAM module U8, L-PAMIF module U9, charging debugging interface J1, battery pack B1, voltage sampling circuit ADC, first 5G signal sending link L1, first 5G signal receiving link L2, second 5G signal sending link L3, second 5G signal receiving link L4, impedance matching circuit IM, antenna ANT, UART bus L5, IIC bus L6, first power amplifier PA1, second power amplifier PA2, first low noise amplifier LNA1, second low noise amplifier LNA2, first filter F1, second filter F2, third filter F3, fourth filter F4, RF switch DP4T, antenna ANT. DETAILED DESCRIPTION

[0020] In order to enable ordinary technicians in the field to more clearly understand the purpose, technical solutions and advantages of the utility model, the utility model is further explained below in conjunction with the drawings and embodiments, but the utility model is not limited to the following embodiments.

[0021] In the description of the present invention, it should be noted that the terms "upper", "lower", "inside", "outside", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0022] like Figure 1As shown, the present embodiment provides an indoor positioning terminal based on 5G signals, including a 5G positioning chip U3 based on 3GPP Release 17, an ultra-low power MCU U2, a three-axis sensor U1, a power management module, a 5G signal transceiver unit, a voltage sampling circuit ADC, and a battery pack B1. The battery pack B1 supplies power to the 5G positioning chip U3, the ultra-low power MCU U2, and the three-axis sensor U1 under the control of the voltage management module.

[0023] The power supply line of the 5G positioning chip U3 is provided with a first load switch U5, and the ultra-low power consumption MCU U2 is connected to the control end of the first load switch U5. When the three-axis sensor U1 detects movement, it sends a signal. After receiving the signal, the ultra-low power consumption MCU U2 exits the ultra-low power consumption mode, and at the same time, the first load switch U5 is turned on through the control end, and the battery pack B1 powers on the 5G positioning chip U3. After the 5G positioning chip U3 is powered on, data is exchanged with the base station of the operator network through the 5G signal transceiver unit, and the base station exchanges data with the server through the operator network. Within a certain period of time, if the three-axis sensor U1 does not detect movement, the ultra-low power consumption MCU U2 enters the ultra-low power consumption mode (standby or sleep), and at the same time, the ultra-low power consumption MCU U2 disconnects the first load switch U5 through the control end to power off the 5G positioning chip U3, and the 5G positioning chip U3 stops working, thereby saving power.

[0024] The battery pack B1 is provided with a power management module, which includes a charging debugging interface J1, a charging chip U7, a second load switch U6 and a power regulator U4. The charging debugging interface J1 is connected to the input side of the charging chip U7, and the output side of the charging chip U7 is connected to the battery pack B1 and the control end of the second load switch U6. The battery pack B1 is connected to the ultra-low power MCU U2 and the three-axis sensor U1 through the second load switch U6 and the power regulator U4. The power regulator U4 is also connected to the 5G positioning chip U3 through the first load switch U5. After the external power supply is turned on, there is an output voltage on the output side of the charging chip U7, and this output voltage charges the battery pack B1. When charging starts, the charging chip U7 disconnects the second load switch U6 through the control end, and the 5G positioning chip U3, the ultra-low power MCU U2, and the three-axis sensor U1 are all de-energized. When the external power supply is disconnected, the output side of the charging chip U7 does not output voltage. The charging chip U7 turns on the second load switch U6 through the control terminal. The power regulator U4 supplies power to the ultra-low power MCU U2 and the three-axis sensor U1. The ultra-low power MCU U2 decides whether to turn on the first load switch U5 to power the 5G positioning chip U3.

[0025] The charging debugging interface J1 is also connected to the debugging interface of the 5G positioning chip U3 for debugging the 5G positioning chip U3. The charging chip U7 is not charged during debugging.

[0026] The ultra-low power MCU U2 is connected to a voltage sampling circuit ADC (using existing technology), and the sampling end of the voltage sampling circuit ADC is connected to the battery pack B1. After the ultra-low power MCU U2 exits the ultra-low power mode, the voltage of the battery pack B1 is sampled through the voltage sampling circuit ADC.

[0027] The ultra-low power MCU U2 is connected to the three-axis sensor U1 and the 5G positioning chip U3 and performs data exchange. The 5G positioning chip U3 is connected to the operator network through the 5G signal transceiver unit. Specifically:

[0028] The ultra-low power MCU U2 is connected to the three-axis sensor U1 through the IIC bus L6 and exchanges data. The ultra-low power MCUU2 is connected to the 5G positioning chip U3 through the UART bus L5 and exchanges data, and sends the acquired three-axis sensor U1 data to the 5G positioning chip U3. After the 5G positioning chip U3 receives the data sent by the ultra-low power MCU U2, it combines its own positioning data and transmits it to the base station through the 5G signal transceiver unit. After receiving the data, the base station processes it and then feeds it back to the server on the operator network side. The data sent by the server is sent through the base station, received by the 5G signal transceiver unit, and then transmitted to the 5G positioning chip U3.

[0029] The 5G signal transceiver unit is provided with at least one group of transceiver links, and the signal frequency band of the transceiver link is determined according to the frequency band of the operator. Figure 1 The 5G signal transceiver unit shown is provided with two groups of transceiver links, corresponding to the transceiver of the 5G N78 frequency band and the 5GN41 frequency band positioning signals, wherein the N78 frequency band is provided with a first 5G signal transmission link L1 and a first 5G signal receiving link L2, the first 5G signal transmission link L1 is provided with a first power amplifier PA1 and a first filter F1, and the first 5G signal receiving link L2 is provided with a second filter F2 and a first low noise amplifier LNA1. The N41 frequency band is provided with a second 5G signal transmission link L3 and a second 5G signal receiving link L4, the second 5G signal transmission link L3 is provided with a second power amplifier PA2 and a third filter F3, and the second 5G signal receiving link is provided with a fourth filter F4 and a second low noise amplifier LNA2. One end of the first 5G signal sending link L1 and the first 5G signal receiving link L2, the second 5G signal sending link L3 and the second 5G signal receiving link L4 are all connected to the 5G positioning chip U3, and the other end is connected to different pins of the RF switch DP4T. The RF switch DP4T is also connected to the antenna ANT through the impedance matching circuit IM. By switching the RF switch DP4T, different links can be connected to the antenna ANT to receive / send data.

[0030] The above-mentioned transceiver link can also be directly implemented by using an existing integrated chip with 5G frequency band signal transceiver function, for example, Figure 1 The second 5G signal sending link L3 can be implemented by the Phase 5N MMMB PAM module U8, and the first 5G signal sending link L1 and the first 5G signal receiving link L2 can be implemented by the L-PAMIF module U9 with integrated RF switch DP4T.

[0031] In this embodiment, the 5G positioning chip U3 is connected to a SIM card module. In addition, the 5G positioning chip and other chips are equipped with conventional peripheral circuits, which will not be introduced in detail here.

[0032] The electronic components such as chips and modules in this embodiment all adopt existing technologies.

[0033] This embodiment can utilize the existing 5G Release 17 proprietary networks of telecom operators such as China Mobile, China Telecom, and China Unicom, measure the location of the positioning terminal on the base station side through the UTDOA technology, and enjoy the network and service guarantees of the operator. At the same time, the operator has system-level maintenance and testing capabilities, and can quickly locate problems when they occur, thereby ensuring the efficient operation of the owner's production business.

[0034] The working principle of this embodiment is:

[0035] (1) The frequency band positioning signal of 5G N78 is output from the TX_HB high frequency port, amplified by the power amplifier in the L-PAMIF module, filtered by the filter, and then transmitted to the antenna ANT port through the RF switch DP4T, and the signal is sent out by the antenna ANT;

[0036] After receiving the signal, the base station of the operator network can determine the location information of the terminal and then send it to the server. For example, after receiving the signal from multiple base stations, the time difference of the terminal signal arriving at different base stations is calculated through UTDOA (Uplink Time Difference of Arrival) to obtain the location of the terminal relative to the base station, and finally obtain the location information of the terminal and send it to the server. UTDOA is an existing technology and will not be further introduced here.

[0037] (2) The frequency band positioning signal of 5G N41 is output from the TX_MHB1 medium and high frequency port of the 5G positioning chip U3, amplified and filtered by the Phase 5N MMMB PAM module, and then transmitted to the antenna ANT port through the RF switch DP4T, and the signal is sent out by the antenna ANT; the base station processes the signal in the same way as above;

[0038] (3) The data sent by the server is sent out through the base station. The 5G positioning chip U3 controls the RF switch DP4T to select the antenna ANT to connect to the first 5G signal receiving link L2, receive the 5G N78 frequency band signal sent by the base station, and send it to the RX HB terminal of the positioning chip after filtering and amplification;

[0039] (4) The data sent by the server is sent outward through the base station. The 5G positioning chip U3 controls the RF switch DP4T to select the antenna ANT to connect to the second 5G signal receiving link L4, receive the 5G N41 frequency band signal, and send it to the RX MHB1 terminal of the positioning chip after filtering and amplification;

[0040] (5) After completing a positioning function, it is necessary to enter a low-power state. The first load switch U5 can be controlled to disconnect through the GPIO interface of the ultra-low-power MCU U2 to power off the 5G positioning chip U3. The ultra-low-power MCU U2 then enters an ultra-low-power state, and the entire terminal enters an ultra-low-power mode.

[0041] (6) The ultra-low power MCU U2 and the 5G positioning chip U3 exchange data through the UART bus L5. In addition to sending positioning signals, the 5G positioning chip U3 can also report data through the operator network. After the ultra-low power MCU U2 exits low power consumption, it will turn on the voltage sampling circuit ADC to sample the voltage of the battery pack, and then read the data of the three-axis sensor U1 through the IIC bus L6, and send it to the 5G positioning chip U3 through the UART bus L5. The 5G positioning chip U3 then uploads the data through the radio frequency signal of the 5G signal transceiver unit;

[0042] (7) In the ultra-low power state, the 5G positioning chip U3 is powered off, and the ultra-low power MCU U2 is in ultra-low power mode. When the three-axis sensor U1 detects the movement of the positioning terminal, it sends a signal to the ultra-low power MCU U2. After receiving the signal, the ultra-low power MCU U2 exits the ultra-low power mode.

[0043] (8) When the charging debugging interface J1 is connected to an external power supply, the charging chip U7 will disconnect the second load switch U6, so that the ultra-low power MCU U2, the three-axis sensor U1, and the 5G positioning chip U3 cannot be powered on during charging and cannot work normally. When the charging power supply is unplugged, the charging chip U7 connects the second load switch U6, and the ultra-low power MCU U2, the three-axis sensor U1, and the 5G positioning chip U3 can use the battery to work normally.

[0044] The above is only a preferred embodiment of the utility model. For those skilled in the art, the utility model may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. An indoor positioning terminal based on 5G signals, Features: It includes a 5G positioning chip (U3), an ultra-low power MCU (U2), a three-axis sensor (U1), and a battery pack (B1) that powers the three. The ultra-low power MCU (U2) is connected to the three-axis sensor (U1) and the 5G positioning chip (U3) and exchanges data. The 5G positioning chip (U3) is connected to the base station of the operator's network through a 5G signal transceiver unit. A first load switch (U5) is provided on the power supply line of the 5G positioning chip (U3), and the ultra-low power consumption MCU (U2) is connected to the control end of the first load switch (U5); when the three-axis sensor (U1) detects movement, it sends a signal, and after receiving the signal, the ultra-low power consumption MCU (U2) exits the ultra-low power consumption mode, and at the same time, the first load switch (U5) is turned on through the control end to power on the 5G positioning chip (U3); after the 5G positioning chip (U3) is powered on, data is exchanged with the base station through the 5G signal transceiver unit, and the base station exchanges data with the server through the operator network; within a certain period of time, when the three-axis sensor (U1) does not detect movement, the ultra-low power consumption MCU (U2) enters the ultra-low power consumption mode, and at the same time, the first load switch (U5) is disconnected through the control end to power off the 5G positioning chip (U3).

2. According to claim 1, an indoor positioning terminal based on 5G signals, Features: The 5G signal transceiver unit includes at least one group of transceiver links, each group has a 5G signal transmission link and a 5G signal reception link, one end of the 5G signal transmission link and the 5G signal reception link are connected to the 5G positioning chip (U3), and the other end is connected to the radio frequency switch (DP4T), and different links are connected to the antenna (ANT) by switching the radio frequency switch (DP4T).

3. According to claim 2, an indoor positioning terminal based on 5G signals, Features: The 5G signal transmission link is provided with a power amplifier and a filter; the 5G signal reception link is provided with a filter and a low-noise amplifier.

4. According to claim 2, an indoor positioning terminal based on 5G signals, Features: An impedance matching circuit (IM) is provided between the radio frequency switch (DP4T) and the antenna (ANT).

5. According to claim 1, an indoor positioning terminal based on 5G signals, Features: The battery pack (B1) is provided with a power management module, which includes a charging debugging interface (J1), a charging chip (U7), a second load switch (U6) and a power regulator (U4); the charging debugging interface (J1) is connected to the input side of the charging chip (U7), the output side of the charging chip (U7) is connected to the battery pack (B1) and the control end of the second load switch (U6), the battery pack (B1) supplies power to the 5G positioning chip (U3), the ultra-low power MCU (U2) and the three-axis sensor (U1) through the second load switch (U6) and the power regulator (U4), and the first load switch (U5) is arranged on the power supply line between the power regulator (U4) and the 5G positioning chip (U3); when the output side of the charging chip (U7) outputs a voltage to charge the battery pack (B1), the charging chip (U7) disconnects the second load switch (U6) through the control end, and when the output side of the charging chip (U7) does not output a voltage, the charging chip (U7) connects the second load switch (U6) through the control end.

6. According to claim 5, an indoor positioning terminal based on 5G signals, Features: The charging debugging interface (J1) is also connected to the debugging interface of the 5G positioning chip (U3).

7. The indoor positioning terminal based on 5G signal according to claim 1, Features: The ultra-low power consumption MCU (U2) is connected to a voltage sampling circuit (ADC), a sampling end of the voltage sampling circuit (ADC) is connected to a battery pack (B1), and the ultra-low power consumption MCU (U2) samples the voltage of the battery pack (B1) through the voltage sampling circuit (ADC) after exiting an ultra-low power consumption mode.

8. The indoor positioning terminal based on 5G signal according to claim 1, Features: The ultra-low power consumption MCU (U2) is connected to the three-axis sensor (U1) via an IIC bus (L6) and performs data exchange.

9. The indoor positioning terminal based on 5G signal according to claim 1, Features: The ultra-low power consumption MCU (U2) is connected to the 5G positioning chip (U3) via the UART bus (L5) and performs data exchange.

10. An indoor positioning terminal based on 5G signals according to any one of claims 1 to 9, Features: The 5G positioning chip (U3) is a 5G positioning chip (U3) of 3GPP Release 17.

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