Beidou energy-saving device and endurance time evaluation method thereof

Abstract

The application provides a Beidou energy-saving device and a method for evaluating the endurance time of the device, which comprises an external antenna for receiving Beidou satellite signals and sending short messages; a terminal device comprising an internal antenna, a Beidou integrated board, a main board, a lithium battery and an interface board; the internal antenna is used for receiving Beidou satellite signals and sending short messages; the Beidou integrated board is used for switching the external antenna and the internal antenna according to the current, receiving and resolving the Beidou satellite signals and transmitting and modulating the signals, and sending the amplified signals to the Beidou satellite through the antenna; the main board is used for controlling external devices and interfaces, supplying power to the Beidou integrated board and mutual communication, and managing the charging and discharging of the lithium battery; the lithium battery is used for supplying power to the Beidou integrated board, the main board, the interface board and the external antenna; a power adapter is used for charging the lithium battery; and a computer is used for sending the length and content of the short messages input by a user on a computer serial port communication interface to the main board. The application saves energy under the condition of ensuring normal signal transmission and reception.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of Beidou positioning technology, and particularly relates to a Beidou energy-saving device and a method for evaluating the endurance time thereof. BACKGROUND

[0002] Compared with other satellite navigation systems, the Beidou navigation system has a short message function, and can transmit text information through Beidou satellites.

[0003] In forest fire prevention, border patrol, unpopulated area exploration and remote mining areas where mobile communication coverage is poor, the temperature difference is large, and the low temperature can reach-40 DEG C; the geographical environment is harsh, and there is no charging condition during long-distance travel. In order to provide reliable position information reporting service, it is required that the continuous working time is not less than 16 hours in normal temperature environment (25 DEG C), and the continuous working time is not less than 8 hours in low temperature environment (-40 DEG C).

[0004] Therefore, it is necessary to provide a short message device with a long endurance time to ensure the implementation of a long-distance task. SUMMARY

[0005] In view of the problems in the prior art, the present application provides a Beidou energy-saving device and a method for evaluating the endurance time thereof.

[0006] The present application provides a Beidou energy-saving device, comprising:

[0007] An external antenna is used for receiving Beidou satellite signals and sending short messages;

[0008] A terminal device comprises a built-in antenna, a Beidou integrated board, a mainboard, a lithium battery and an interface board, the built-in antenna, the mainboard and the external antenna are connected with the Beidou integrated board, and the lithium battery and the interface board are connected with the mainboard;

[0009] The built-in antenna is used for receiving Beidou satellite signals and sending short messages;

[0010] The Beidou integrated board is used for controlling the switching access between the external antenna and the built-in antenna according to the current of the Beidou integrated board, receiving the Beidou satellite signals from the external antenna and / or the built-in antenna, and receiving and solving the Beidou satellite signals and modulating the transmission, and then sending the amplified signals to the Beidou satellite through the external antenna and / or the built-in antenna;

[0011] The mainboard is used for controlling external devices and interfaces, supplying power to the Beidou integrated board and mutual communication, and managing the charging and discharging of the lithium battery;

[0012] The lithium battery is used for supplying power to the Beidou integrated board, the mainboard, the interface board and the external antenna;

[0013] A power adapter is connected with the interface board, and the power adapter is used to charge the lithium battery through the interface board and the main board.

[0014] A computer is connected with the interface board, and the computer is used to send the length and content of the short message input by a user in a computer serial port communication interface to the main board.

[0015] The application also provides a method for evaluating the endurance time of the Beidou energy-saving device.

[0016] The screen-on working power consumption of the terminal device in the Beidou energy-saving device is determined.

[0017] The screen-off endurance time of the terminal device is determined according to the screen-on working power consumption.

[0018] The total endurance time of the Beidou energy-saving device is determined according to the preset screen-on working time of the terminal device and the screen-off endurance time.

[0019] The Beidou energy-saving device and the method for evaluating the endurance time thereof provided by the application can reduce the power consumption under the condition of ensuring the normal signal receiving and transmitting, and can provide stable short message communication under the environment with poor communication signal coverage or without wired network resources. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the application or prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative effort on the basis of these drawings.

[0021] Figure 1 is one of the structural schematic diagrams of the Beidou energy-saving device provided by the application;

[0022] Figure 2 is the second structural schematic diagram of the Beidou energy-saving device provided by the application;

[0023] Figure 3 is the schematic diagram of the position information reporting transmission, reception and storage in the Beidou energy-saving device provided by the application;

[0024] Figure 4 is the schematic diagram of the position information reporting transmission, reception and storage in the Beidou energy-saving device provided by the application;

[0025] Figure 5The present application provides a Beidou energy-saving device environmental temperature position information reporting endurance time length schematic diagram.

[0026] Figure 6 The present application provides a Beidou energy-saving device power consumption evaluation schematic diagram.

[0027] Figure 7 The present application provides a Beidou energy-saving device endurance time length estimation method flowchart schematic diagram.

[0028] Figure 8 The present application provides a Beidou energy-saving device endurance time length test evaluation method flowchart schematic diagram. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical scheme and advantages of the present application clearer, the technical scheme in the present application will be described clearly and completely below in combination with the drawings in the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0030] In the prior art, a Beidou-3 RDSS (Radio Determination Satellite Service) mobile phone back clip includes an MCU (Microcontroller Unit), an RDSS short message module, a power management module, a battery, an RDSS antenna and a USB (Universal Serial Bus) C interface for connecting a mobile phone, realizes the organic combination of the Beidou-3 back clip and the public network mobile phone, plug and play, and realizes short message communication.

[0031] Disadvantages: first, it needs to be combined with a public network mobile phone, and cannot provide short message communication in the environment without a public network mobile phone or poor mobile signal coverage; second, it does not provide an RNSS (Radio Navigation Satellite Service) antenna, and cannot provide high-precision short message location service; third, the hardware module does not explain energy-saving application, and cannot provide long endurance time length.

[0032] In the prior art, a Beidou short message sharing terminal and a Beidou short message receiving and sending method, the Beidou short message sharing terminal integrates a Beidou short message module, a wired network interface module, a WIFI (Wireless Fidelity) module, an AP (Access Point) module, a Bluetooth wireless module and other communication interfaces. The short message receiving and sending sharing is realized through the communication interfaces.

[0033] Disadvantages are: first, the shared terminal cannot provide short message communication in the environment with poor communication signal coverage or without wired network resources by integrating wired and wireless communication modules; second, the shared terminal is inconvenient for mobile and portable use and cannot support outdoor environment applications such as border patrol and forest inspection; third, the RNSS antenna is not provided on the hardware circuit, and high-precision short message location service cannot be provided; fourth, the L frequency point has large transmission power and large power consumption, and is not an energy-saving device, and cannot support portable long-time endurance applications; fifth, the short message transceiving process is too complex, multiple interfaces need to be queued for transceiving, there is a risk of delay conflict and short message loss, thereby affecting the success rate of short message communication.

[0034] The present application has essential differences from the prior art. How to realize short message transceiving communication without public network or external communication interface, to provide regional short message communication and global short message communication, to support various combined applications by installation and adaptation, to be convenient to use, and to realize long-endurance high-precision location information reporting and energy-saving evaluation method are the innovation points of the present application.

[0035] The present application will be described below in combination with Figure 1 A Beidou energy-saving device is described.

[0036] An external antenna is used for receiving Beidou satellite signals and transmitting short messages.

[0037] A terminal device includes a built-in antenna, a Beidou integrated board, a mainboard, a lithium battery and an interface board, the built-in antenna, the mainboard and the external antenna are connected with the Beidou integrated board, and the lithium battery and the interface board are connected with the mainboard.

[0038] The built-in antenna is used for receiving Beidou satellite signals and transmitting short messages.

[0039] The Beidou integrated board is used for switching access between the external antenna and the built-in antenna according to the current of the Beidou integrated board, receiving Beidou satellite signals from the external antenna and / or the built-in antenna, and providing intermediate frequency signals processed by frequency conversion to a baseband circuit, receiving and solving the Beidou satellite signals, and transmitting the signals to a Beidou satellite through the external antenna and / or the built-in antenna after amplification.

[0040] The mainboard is used for controlling external devices and interfaces, supplying power to the Beidou integrated board and mutual communication, and charging and discharging management of the lithium battery.

[0041] The lithium battery is used for supplying power to the Beidou integrated board, the mainboard, the interface board and the external antenna.

[0042] A power adapter is connected with the interface board, and the power adapter is used for charging the lithium battery through the interface board and the mainboard.

[0043] A computer connected with the interface board, the computer is used for sending the length and content of the short message inputted by the user in the computer serial port communication interface to the main board, and further receiving the position information sentence.

[0044] The terminal device can be a mobile phone, a tablet or other wearable device. The power adapter supports 5V slow charging and 12V fast charging for the charging voltage of the lithium battery. The lithium battery has large capacity and can work normally at low temperature of-40℃. The Beidou integrated board is further used for transmitting and receiving Beidou regional short messages and Beidou global short messages.

[0045] The embodiment comprehensively utilizes the built-in antenna and the external antenna of the terminal device, controls the switching access between the external antenna and the built-in antenna by detecting the current, thereby reducing the power consumption under the condition of ensuring normal signal transmission and reception, and providing stable short message communication in the environment with poor communication signal coverage or without wired network resources.

[0046] On the basis of the above embodiment, as shown in the figure, Figure 2 The external antenna includes a B2b antenna and a general antenna in the embodiment, the general antenna is used for receiving satellite signals of Beidou S, B3, B1 and B2 frequency points, and transmitting global short messages and regional short messages, the B2b antenna is an active antenna, which contains a low noise amplifier and a filter circuit, and the B2b antenna is used for receiving global short messages; and / or,

[0047] The built-in antenna includes a Beidou L antenna oscillator, a Beidou S receiving antenna oscillator and a Beidou B3 receiving antenna oscillator, the built-in antenna is used for receiving satellite signals of Beidou B3 and S frequency points, and transmitting regional short messages of L frequency points; and / or,

[0048] The Beidou integrated board includes an L power amplifier circuit, an S low noise amplifier circuit, a B3 low noise amplifier circuit, a switch, a power division network, a filter, a multi-mode multi-frequency transceiver circuit, a current detection circuit, a Beidou baseband circuit, an interface circuit and a power conversion circuit, one end of each of the L power amplifier circuit, the S low noise amplifier circuit and the B3 low noise amplifier circuit is connected with the power division network and the corresponding filter through the corresponding switch, the other end of each of the L power amplifier circuit, the S low noise amplifier circuit and the B3 low noise amplifier circuit is connected with the built-in antenna, the power division network is connected with the filter and the current detection circuit, the multi-mode multi-frequency transceiver circuit is connected with the filter, the multi-mode multi-frequency transceiver circuit, the current detection circuit and the interface circuit are connected with the Beidou baseband circuit; and / or,

[0049] The main board comprises one or more of a power management circuit, a first storage medium (storage medium 2) and a first control circuit (control circuit 2), the first storage medium (storage medium 2) is used for storing one or more of short message information, serial port information and configuration information, the power management circuit is used for charging and discharging management of the lithium battery, and converts the power provided by the lithium battery into a preset direct current voltage output (such as a boost-buck power conversion output of 5V direct current voltage), the first control circuit (control circuit 2) is used for control processing of peripherals, a display screen and an external interface, and exchanges interface information protocols; and / or,

[0050] The interface board comprises a USB-TypeC interface circuit, the USB-TypeC interface circuit comprises one or more of 1pps, a first serial port (serial port 2), a second serial port (serial port 3), a Vbus and a D+ / D- interface, the first serial port (serial port 2) is used for filling and testing, the second serial port (serial port 3) is used for exchanging information with external equipment, the D+ / D- interface is used for exchanging information with the computer, and the Vbus interface is used for charging the terminal equipment by an alternating current power adapter, and the Vbus interface direct current voltage supports +12V fast charging and +5V slow charging.

[0051] The ordinary antenna in the external antenna comprises a Beidou L, S, B1, B3 and B2 antenna oscillator, a Beidou L transmission power amplification circuit, a Beidou S receiving low noise amplification circuit, a Beidou receiving B1 low noise amplification circuit, a Beidou receiving B3, B2b and B2a low noise amplification circuit, and is used for receiving Beidou S, B3, B1 and B2 satellite signals and transmitting global short messages or regional short messages. The external antenna is connected and used through an external port of a mobile phone.

[0052] The Beidou integrated board is used for receiving, amplifying, filtering, down-converting and baseband positioning calculation of Beidou S, B3, B1, B2b and B2a signals, and is also used for transmitting Beidou regional short messages and Beidou global short messages.

[0053] On the basis of the above-mentioned embodiments, as Figure 2As shown, the interface circuit in the embodiment includes one or more of 1pps, a third serial port (serial port 0), a fourth serial port (serial port 1), a first power supply voltage (VCC1), and a second power supply voltage (VCC2), which are used for interfacing and level conversion, the third serial port (serial port 0) is used for filling and testing, the fourth serial port (serial port 1) is used for exchanging information with the mainboard, the first power supply voltage (VCC1) and the second power supply voltage (VCC2) receive the current (such as +5V DC) output from the power management circuit, the first power supply voltage (VCC1) supplies power to the power conversion circuit, and the second power supply voltage (VCC2) supplies power to the current detection circuit, the external port, and the built-in L power amplifier circuit; and / or,

[0054] The multi-mode multi-frequency transceiver circuit includes one or more of a transmit signal up-conversion modulation circuit, a receive signal down-conversion processing circuit, and a register circuit, the register is used to store configuration information of transceiver circuit parameters, such as transmit circuit opening or closing, and receive circuit low-power mode configuration; and / or,

[0055] The Beidou baseband circuit includes one or more of a second control circuit (control circuit 1), other logic circuits, and firmware.

[0056] The other logic circuits and firmware are used to receive the intermediate frequency signal of the down-conversion output of the multi-mode multi-frequency transceiver circuit, solve the output position information, and send the short message baseband signal to the multi-mode multi-frequency transceiver circuit for modulation and output;

[0057] The second control circuit (control circuit 1) is used to configure the transmit signal control word of the multi-mode multi-frequency transceiver circuit, which is not limited to including the control word of the transmit signal high-low temperature compensation, and controls the switching of the switch according to the current detected by the current detection circuit, including controlling the switches corresponding to the L power amplifier circuit, the S low-noise amplifier circuit, and the B3 low-noise amplifier circuit, to realize the switching access between the external antenna and the built-in antenna; and / or,

[0058] The power conversion circuit is used to convert the direct current output by the first power supply voltage (VCC1) in the interface circuit into different voltages, respectively, to supply power to the low-noise amplifier circuit, the switch, the multi-mode multi-frequency transceiver circuit, the current detection circuit, and the Beidou baseband circuit.

[0059] The power conversion circuit improves the power conversion efficiency, and the power conversion efficiency is between 88% and 96% in a low-voltage and small-current state. For example, the power conversion circuit converts the +2.5V to 4.35V direct current output by VCC1 in the receiving interface circuit into 3.3V, 1.8V, 1.35V, 1.2V, and 0.8V, respectively, to supply power to the low-noise amplifier circuit, the switch, the multi-mode multi-frequency transceiver circuit, the current detection, and the Beidou baseband circuit, etc.

[0060] On the basis of the above-mentioned embodiments, in the present embodiment, the second control circuit is configured to:

[0061] In the case that the current detected by the current detection circuit is less than a first preset threshold, the switches are controlled to switch to an internal antenna working mode, the switch connected to the L power amplifier circuit switches the internal channel, the switch connected to the S low noise amplifier circuit switches the internal channel and turns on the S low noise amplifier circuit, and the switch connected to the B3 low noise amplifier circuit switches the internal channel and turns on the B3 low noise amplifier circuit, the internal antenna working mode is configured to transmit regional short messages through the internal L power amplifier circuit and receive Beidou satellite signals through the B3 low noise amplifier circuit;

[0062] In the case that the current detected by the current detection circuit is greater than or equal to the first preset threshold and less than or equal to a second preset threshold, the switches are controlled to switch to a mixed working mode of the internal antenna and the external antenna, the switch connected to the L power amplifier circuit switches the internal channel, the switch connected to the S low noise amplifier circuit switches the external channel and turns off the S low noise amplifier circuit, and the switch connected to the B3 low noise amplifier circuit switches the internal channel and turns on the B3 low noise amplifier circuit, the second preset threshold is greater than the first preset threshold, and the mixed working mode is configured to transmit global short messages through the internal L power amplifier circuit, receive Beidou satellite signals through the B3 low noise amplifier circuit, and receive short message reply signals through the external B2b antenna;

[0063] In the case that the current detected by the current detection circuit is greater than the second preset threshold, the switches are controlled to switch to an external antenna working mode, the switch connected to the L power amplifier circuit switches the external channel, the switch connected to the S low noise amplifier circuit switches the external channel and turns off the S low noise amplifier circuit, the switch connected to the B3 low noise amplifier circuit switches the external channel and turns off the B3 low noise amplifier circuit, and the external antenna working mode is configured to transmit global short messages or regional short messages through the external general antenna and receive Beidou satellite signals through the external B3 low noise amplifier circuit.

[0064] The first preset threshold can be set to 20 mA, and the second preset threshold can be set to 60 mA.

[0065] On the basis of the above-mentioned embodiments, as shown in Figure 3 In the present embodiment, the short message transmission and reception mode includes an external global short message, an external regional short message, and an internal regional short message.

[0066] There are two configurations for external global short message, one is to configure external B2b antenna, internal antenna, internal L power amplifier, internal B3 low noise amplifier, multi-mode multi-frequency transceiver circuit, Beidou baseband circuit, interface circuit, mainboard and interface board and other circuit combinations, the second is to configure external ordinary antenna, multi-mode multi-frequency transceiver circuit, Beidou baseband circuit, interface circuit, mainboard, interface board and other circuit combinations, the two combinations can be used as external global short message position information reporting transceiver.

[0067] For built-in regional short message, the configuration content includes internal antenna, internal power amplifier, internal S low noise amplifier, internal B3 low noise amplifier, multi-mode multi-frequency transceiver circuit, Beidou baseband circuit, interface circuit, mainboard and interface board and other circuit combinations, which are used for built-in regional short message position information reporting transceiver.

[0068] For external regional short message, the configuration content includes external ordinary antenna, multi-mode multi-frequency transceiver circuit, Beidou baseband circuit, interface circuit, mainboard and interface board and other circuit combinations, which are used for external regional short message position information reporting transceiver.

[0069] On the basis of the above embodiment, the computer in the embodiment is further used to count the number of short message receipts received from the mainboard, and calculate the short message communication success rate according to the number.

[0070] On the basis of the above embodiment, as shown in Figure 4 The operation of the short message in the embodiment includes solving position information, receiving short message and sending short message, the word length of the sent short message is less than or equal to a preset number of Chinese characters, different transmission rates are supported, the positioning accuracy of the solved position information is that the error in the horizontal direction is less than or equal to a third preset threshold value, and the error in the elevation direction is less than or equal to a fourth preset threshold value.

[0071] For example, the word length provided by the sent short message is 1000 Chinese characters at most, four grades of transmission rates of 2kbps, 4kbps, 8kbps and 16kbps are supported, the storage capacity is 256GB, and the hardware circuit can receive RNSS B3 frequency satellite positioning signal. The solved position information is used to provide positioning accuracy (95%): horizontal ≤ 6m, elevation ≤ 8m, which can provide high-precision short message position service, and the positioning accuracy is higher than that of S position. The received short message information is used to receive the receipt information of the transmitted short message, and is used to calculate the position signal reporting communication success rate.

[0072] The application also provides a method for evaluating the endurance time of the Beidou energy-saving device according to any one of the above embodiments, which is used for energy-saving design evaluation, comprising:

[0073] Determine the screen-on working power consumption of the terminal device in the Beidou energy-saving device;

[0074] determine the screen-off endurance time of the terminal device according to the screen-on working power consumption;

[0075] determine the total endurance time of the Beidou energy-saving device according to the preset screen-on working time of the terminal device and the screen-off endurance time.

[0076] On the basis of the above-mentioned embodiments, the screen-on working power consumption of the terminal device in the Beidou energy-saving device is determined in this embodiment, which comprises:

[0077] The screen-on working power consumption is calculated according to the screen-on transient power consumption, the screen-off transient power consumption and the preset screen-on working time of the terminal device, and the transmission duration of each position information report and the transmission frequency of each position information report.

[0078] On the basis of the above-mentioned embodiments, the screen-on working power consumption is calculated by the following formula in this embodiment:

[0079] B = (P2 + (P3 - P2) x T1 / T2) x T3

[0080] Wherein, B is the screen-on working power consumption, the unit is watt-hour; P2 is the screen-on transient power consumption, the unit is watt; P3 is the screen-off transient power consumption, the unit is watt; T1 is the transmission duration of each position information report, the unit is second; T2 is the transmission frequency of each position information report, the unit is second; T3 is the preset screen-on working time, the unit is hour.

[0081] On the basis of the above-mentioned embodiments, the screen-off endurance time of the terminal device is determined according to the screen-on working power consumption by the following formula in this embodiment, which comprises:

[0082] T4 = (A - B) / (P1 + (P3 - P1) x T1 / T2)

[0083] Wherein, T4 is the screen-off endurance time, the unit is hour, A is the maximum capacity of the lithium battery, the unit is watt-hour; P1 is the standby transient power consumption of the terminal device, the unit is watt;

[0084] The formula of the total endurance time T5 of the Beidou energy-saving device is:

[0085] T5 = T3 + T4.

[0086] On the basis of the above-mentioned embodiments, the endurance mode selection of the Beidou energy-saving device in this embodiment comprises the built-in antenna endurance when the environment temperature is less than the fifth preset threshold (low temperature) and the external antenna endurance when the environment temperature is greater than or equal to the fifth preset threshold (high temperature).

[0087] In the long distance, the implementation provides the Beidou energy saving device without charging condition, which can continuously report position information for not less than 16 hours at normal temperature environment (25℃), and can normally receive and transmit position information report for not less than 8 hours at low temperature environment (-40℃).

[0088] Figure 5 is a schematic diagram of the endurance time of position information report provided by the embodiment of the application at ambient temperature, including normal temperature endurance time evaluation and low temperature endurance time evaluation. The normal temperature endurance time evaluation is configured to use the built-in area short message in Figure 3 to evaluate the normal temperature endurance time of the Beidou energy saving device; the low temperature endurance time evaluation is configured to use the external area short message in Figure 3 to evaluate the low temperature endurance time of the Beidou energy saving device.

[0089] Figure 6 is a schematic diagram of the power consumption evaluation of the Beidou energy saving device provided by the embodiment of the application, and the flow steps include: first, standby receiving positioning information power consumption evaluation; further, screen-on transmitting and receiving position information report power consumption evaluation, including transmitting position information report power consumption evaluation and standby receiving positioning information power consumption evaluation; further, screen-off transmitting and receiving position information report power consumption evaluation, including transmitting position information report power consumption evaluation and standby receiving positioning information power consumption evaluation.

[0090] The detailed parameters of the normal temperature built-in antenna power consumption evaluation are shown in Table 1, and the detailed parameters of the low temperature external ordinary antenna power consumption evaluation table are shown in Table 2. The standby receiving positioning information power consumption is 1.05W at normal temperature 25℃, and the power consumption is 1.16W at low temperature -40℃; the screen-on receiving positioning information power consumption is 1.33W at normal temperature 25℃, and the power consumption is 1.44W at low temperature -40℃; the transmitting position information report power consumption is 12.45W at normal temperature 25℃, and the power consumption is 12.56W at low temperature -40℃.

[0091] Table 1

[0092]

[0093] Table 2

[0094]

[0095] Figure 7 is a schematic diagram of the endurance time estimation method of the Beidou energy saving device provided by the embodiment of the application, and the method steps include: first, lithium battery total discharge capacity estimation, at normal temperature +25℃, the total discharge capacity C1 is evaluated according to the product of the lithium battery voltage value and the battery capacity; at low temperature -40℃, the total discharge capacity C2 of the lithium battery is evaluated to be about 61% of the total discharge capacity at normal temperature. Further, standby, screen-on and screen-off power consumption estimation, details are shown in Figure 6The power consumption of the provided Beidou energy-saving device is evaluated; further, the position information report transmission time length and transmission frequency value are provided: the maximum support is 1000 Chinese characters each time within the transmission time length, and the value of the embodiment is 1000 Chinese characters, and the time length is about 1 second; the transmission frequency supports the interval of 30 seconds to 180 seconds, and the value of the embodiment is the positioning information report frequency of 120 seconds; further, the endurance mode selection is provided: the built-in antenna endurance in low temperature environment; the external antenna endurance in normal temperature environment, which is shown in detail in Figure 5 The endurance time length of the position information report in the provided environment temperature is shown in the schematic diagram; further, the scene estimation is provided: the value of the screen-on endurance time length in the embodiment is 1 hour or 2 hours; the screen-on power consumption is calculated, and then the screen-off endurance time length is calculated, and finally the total endurance time length is calculated.

[0096] Table 3 is an estimation example of the normal temperature endurance time length provided by the embodiment of the present application, which adopts the above-mentioned Figure 7 The endurance time length evaluation method provided by the embodiment of the present application is adopted, and the normal temperature endurance time length is calculated as 18.13 hours by using the above-mentioned endurance time length evaluation calculation formula.

[0097] Table 4 is an estimation table of the low temperature endurance time length provided by the embodiment of the present application, which adopts the above-mentioned Figure 7 The endurance time length evaluation method provided by the embodiment of the present application is adopted, and the low temperature endurance time length is calculated as 10.14 hours by using the above-mentioned endurance time length evaluation calculation formula.

[0098] Table 3

[0099]

[0100] Table 4

[0101] Item Value Unit Remark Lithium battery maximum capacity 12.98 Wh, watt hour Standby transient power consumption 1.16 W, watt Screen-on transient power consumption 1.44 W, watt Screen-off transient power consumption 12.56 W, watt Duration of each position information report transmission 1.00 S, second 1000 Chinese characters Frequency of each position information report transmission 120.00 S, second Cumulative screen-on working time length 1.00 h, hour Screen-on time length 1 hour Cumulative screen-on working power consumption 1.53 Wh, watt hour Screen-off working time length 9.14 h, hour Endurance time length 10.14 h, hour

[0102] Figure 8 The endurance time length test evaluation method provided by the embodiment of the present application is shown in the schematic diagram, and the steps of the endurance time length test evaluation method include: first, the lithium battery of the mobile phone is fully charged, and the lithium battery voltage is 4.35V≤lithium battery voltage<4.45V; further, the normal temperature or low temperature endurance mode is selected, and the built-in antenna or external antenna endurance mode is selected; further, the mobile phone is set up to receive and transmit information from the sky, and the basic parameters are set; further, the screen-on working time length is set to 1 hour or 2 hours, the position information report transmission frequency is set to 120 seconds, and the content of 1000 Chinese characters is transmitted each time; further, the position information report transmission button on the display screen is clicked to start counting the number of position information reports, and whether the communication success rate is greater than 95% is counted. The above-mentioned endurance time length test evaluation method is adopted, the normal temperature endurance time length is measured as 17.5 hours, and the communication success rate is 98%; the low temperature endurance time length is measured as 9.9 hours, and the communication success rate is 96%.

[0103] It should be pointed out finally that the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit the same; and although the present application has been described in detail with reference to the foregoing embodiments, it should be appreciated by those skilled in the art that the technical solutions recorded in the foregoing embodiments can be modified, or some technical features thereof can be replaced equivalently; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A method for evaluating the flight time of a Beidou energy-saving device, characterized in that: The device comprises: External antenna for receiving Beidou satellite signals and sending short messages; The terminal device includes a built-in antenna, a Beidou integrated board, a mainboard, a lithium battery, and an interface board. The built-in antenna, the mainboard, and the external antenna are connected to the Beidou integrated board, and the lithium battery and the interface board are connected to the mainboard. The built-in antenna is used to receive Beidou satellite signals and send short messages; The Beidou integrated board is used to control the switching access between the external antenna and the internal antenna according to its own current, receive Beidou satellite signals from the external antenna and / or the internal antenna, perform reception and decoding and transmission modulation on the Beidou satellite signals, and send them to Beidou satellites through the external antenna and / or the internal antenna after amplification; The mainboard is used to control external devices and interfaces, power the Beidou integrated board and enable mutual communication, and manage the charge and discharge of the lithium battery; The lithium battery is used to power the Beidou integrated board, main board, interface board and external antenna; A power adapter connected to the interface board, the power adapter being used to charge the lithium battery through the interface board and the main board; A computer connected to the interface board, the computer being used to send the length and content of the short message input by the user on the computer serial communication interface to the main board; The endurance evaluation method includes: Determine the power consumption of the terminal device with the screen on in the Beidou energy-saving device; Determining the screen-off battery life of the terminal device based on the screen-on power consumption; Determining the total battery life of the Beidou energy-saving device according to the preset screen-on working time and the screen-off battery life of the terminal device; Determine the power consumption of the terminal device in the Beidou energy-saving device with the screen on, including: Calculate the screen-on working power consumption based on the screen-on transient power consumption, screen-off transient power consumption, and preset screen-on working time of the terminal device, as well as the transmission duration and transmission frequency of each location information report; The power consumption of the bright screen operation is calculated by the following formula: B=(P2+(P3-P2)×T1 / T2)×T3 Wherein, B is the power consumption of the screen on operation; P2 is the instantaneous power consumption of the screen on, in watts; P3 is the instantaneous power consumption of the screen off, in watts; T1 is the transmission duration of each location information report, in seconds; T2 is the transmission frequency of each location information report, in seconds; T3 is the preset screen on operation duration, in hours; The screen-off battery life of the terminal device is determined based on the screen-on power consumption using the following formula, including: T4 = (AB) / (P1+(P3-P1)×T1 / T2) Wherein, T4 is the screen-off battery life, A is the maximum capacity of the lithium battery, and P1 is the standby transient power consumption of the terminal device; The formula for the total endurance time T5 of the Beidou energy-saving device is: T5=T3+T4.

2. The method for evaluating the flight time of a Beidou energy-saving device according to claim 1, wherein: The external antenna includes a B2b antenna and a common antenna, wherein the common antenna is used to receive satellite signals of Beidou S, B3, B1 and B2 frequencies, and to send global short messages and regional short messages, and the B2b antenna is an active antenna containing a low-noise amplifier and a filter circuit, and is used to receive global short messages; and / or, The built-in antenna includes a Beidou L antenna vibrator, a Beidou S receiving antenna vibrator and a Beidou B3 receiving antenna vibrator, and the built-in antenna is used to receive satellite signals of Beidou B3 and S frequency points and transmit regional short messages of L frequency point; and / or, The Beidou integrated board includes an L power amplifier circuit, an S low noise amplifier circuit, a B3 low noise amplifier circuit, a switch, a power division network, a filter, a multi-mode multi-frequency transceiver circuit, a current detection circuit, a Beidou baseband circuit, an interface circuit and a power conversion circuit. One end of each of the L power amplifier circuit, the S low noise amplifier circuit and the B3 low noise amplifier circuit is connected to the power division network and the corresponding filter through a corresponding switch, and the other end of each is connected to the built-in antenna. The power division network is connected to the filter and the current detection circuit, the multi-mode multi-frequency transceiver circuit is connected to the filter, and the multi-mode multi-frequency transceiver circuit, the current detection circuit, and the interface circuit are connected to the Beidou baseband circuit; and / or, The mainboard includes one or more of a power management circuit, a first storage medium, and a first control circuit, wherein the first storage medium is used to store one or more of short message information, serial port information, and configuration information; the power management circuit is used to manage the charge and discharge of the lithium battery and convert the power provided by the lithium battery into a preset DC voltage output; the first control circuit is used to control and process peripherals, display screens, and external interfaces, and exchange interface information protocols; and / or, The interface board includes a USB-TypeC interface circuit, which includes one or more of 1pps, a first serial port, a second serial port, a Vbus and a D+ / D- interface. The first serial port is used for charging and debugging, the second serial port is used for exchanging information with an external device, the D+ / D- interface is used for exchanging information with the computer, and the Vbus interface is used for an AC power adapter to charge the terminal device.

3. The method for evaluating the flight time of a Beidou energy-saving device according to claim 2, wherein: The interface circuit includes one or more of 1pps, a third serial port, a fourth serial port, a first power supply voltage, and a second power supply voltage. The interface circuit is used for interface and level conversion. The third serial port is used for charging and debugging, and the fourth serial port is used to interact with the mainboard. The first power supply voltage and the second power supply voltage receive the current output from the power management circuit. The first power supply voltage powers the power conversion circuit, and the second power supply voltage powers the current detection circuit, the external port, and the built-in L power amplifier circuit. and / or, The multi-mode multi-frequency transceiver circuit includes one or more of a transmission signal up-conversion modulation circuit, a reception signal down-conversion processing circuit, and a register circuit, wherein the register is used to store configuration information of transceiver circuit parameters; and / or, The Beidou baseband circuit includes one or more of a second control circuit, other logic circuits and firmware; The other logic circuits and firmware are used to receive the intermediate frequency signal output by the down-conversion of the multi-mode multi-frequency transceiver circuit, calculate and output position information, and send a short message baseband signal to the multi-mode multi-frequency transceiver circuit for modulation and output; The second control circuit is used to configure the transmission signal control word of the multi-mode multi-frequency transceiver circuit, and control the switching of the switch according to the current of the Beidou baseband circuit detected by the current detection circuit, so as to achieve switching access between the external antenna and the internal antenna; and / or, The power conversion circuit is used to convert the direct current output of the first power supply voltage in the interface circuit into different voltages, respectively powering the low-noise amplifier circuit, switch, multi-mode multi-frequency transceiver circuit, current detection circuit and Beidou baseband circuit.

4. The method for evaluating the flight time of a Beidou energy-saving device according to claim 3, wherein: The second control circuit is used for: When the current detected by the current detection circuit is less than a first preset threshold, the switch is controlled to switch to the built-in antenna operating mode, the switch connected to the L power amplifier circuit switches the built-in channel, the switch connected to the S low noise amplifier circuit switches the built-in channel and turns on the S low noise amplifier circuit, and the switch connected to the B3 low noise amplifier circuit switches the built-in channel and turns on the B3 low noise amplifier circuit. The built-in antenna operating mode is used to transmit regional short messages through the built-in L power amplifier circuit and receive Beidou satellite signals through the B3 low noise amplifier circuit; When the current detected by the current detection circuit is greater than or equal to the first preset threshold and less than or equal to the second preset threshold, the switch is controlled to switch to a mixed working mode of the internal antenna and the external antenna, the switch connected to the L power amplifier circuit switches the internal channel, the switch connected to the S low noise amplifier circuit switches the external channel and turns off the S low noise amplifier circuit, and the switch connected to the B3 low noise amplifier circuit switches the internal channel and turns on the B3 low noise amplifier circuit, the second preset threshold is greater than the first preset threshold, and the mixed working mode is used to transmit global short messages through the internal L power amplifier circuit, receive Beidou satellite signals through the B3 low noise amplifier circuit, and receive short message receipt signals through the external B2b antenna; When the current detected by the current detection circuit is greater than the second preset threshold, the switch is controlled to switch to the external antenna working mode, the switch connected to the L power amplifier circuit switches the external channel, the switch connected to the S low noise amplifier circuit switches the external channel and turns off the S low noise amplifier circuit, and the switch connected to the B3 low noise amplifier circuit switches the external channel and turns off the B3 low noise amplifier circuit. In the external antenna working mode, global short messages or regional short messages are sent and received through an external ordinary antenna, and Beidou satellite signals are received through the external B3 low noise amplifier circuit.

5. The method for evaluating the flight time of a Beidou energy-saving device according to claim 2, wherein: The short message sending and receiving modes include external global short message, external regional short message and internal regional short message; For an external global short message, the configuration includes an external B2b antenna, an internal antenna, a built-in L power amplifier, a built-in B3 low-noise amplifier, a multi-mode and multi-frequency transceiver circuit, a Beidou baseband circuit, an interface circuit, a main board, and an interface board; or an external ordinary antenna, a multi-mode and multi-frequency transceiver circuit, a Beidou baseband circuit, an interface circuit, a main board, and an interface board; For built-in regional short messages, the configuration includes built-in antenna, built-in power amplifier, built-in S low-noise amplifier, built-in B3 low-noise amplifier, multi-mode multi-frequency transceiver circuit, Beidou baseband circuit, interface circuit, main board and interface board; For external regional short messages, the configuration includes an external ordinary antenna, a multi-mode and multi-frequency transceiver circuit, a Beidou baseband circuit, an interface circuit, a main board, and an interface board.

6. The method for evaluating the flight time of a Beidou energy-saving device according to claim 1, wherein: The computer is further used to count the number of receipts of short messages received from the mainboard, and to calculate the message communication success rate based on the number.

7. The method for evaluating the flight time of a Beidou energy-saving device according to claim 1, wherein: The operations on the short message include calculating position information, receiving short messages and sending short messages. The word length of the short message sent is less than or equal to a preset number of Chinese characters, and different transmission rates are supported. The positioning accuracy of the calculated position information is that the error in the horizontal direction is less than or equal to the third preset threshold, and the error in the elevation direction is less than or equal to the fourth preset threshold.

8. The method for evaluating the flight time of a Beidou energy-saving device according to claim 1, wherein: The battery life options of the Beidou energy-saving device include the battery life of the built-in antenna when the ambient temperature is less than a fifth preset threshold and the battery life of the external antenna when the ambient temperature is greater than or equal to the fifth preset threshold.

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