CN215072424U - LoRa signal generator and LoRa system - Google Patents
LoRa signal generator and LoRa system Download PDFInfo
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- CN215072424U CN215072424U CN202120717489.XU CN202120717489U CN215072424U CN 215072424 U CN215072424 U CN 215072424U CN 202120717489 U CN202120717489 U CN 202120717489U CN 215072424 U CN215072424 U CN 215072424U
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Abstract
The utility model provides a LoRa signal generator and a LoRa system, a man-machine interaction device used for interacting information with a user is arranged outside a shell of the signal generator, and a singlechip in communication connection with the man-machine interaction device is arranged in the shell, so that the portability of the signal generator is improved; the signal generator also comprises a signal receiving circuit and a signal sending circuit, the single chip microcomputer can receive a configuration instruction of a user through the man-machine interaction device and send a modulation instruction corresponding to the configuration instruction to the signal receiving circuit and/or the signal sending circuit, and then the signal receiving circuit and/or the signal sending circuit adjust circuit parameters to parameters corresponding to the modulation instruction. The utility model discloses can alleviate the not high problem of efficiency of software testing and the accuracy of test result that exists among the current loRa radio frequency index test method.
Description
Technical Field
The utility model belongs to the technical field of the communication technology and specifically relates to a loRa signal generator and loRa system are related to.
Background
Long Range Radio (LoRa) is a low power local area network wireless communication technology. LoRa is realized based on spread spectrum technology, has powerful interference killing feature. The maximum characteristic of LoRa is that the transmission distance is farther than that of other communication technologies under the conditions of low transmission rate requirement and same power consumption, and the characteristics of low power consumption and long-distance transmission are considered. Because of the characteristics, the LoRa is widely applied to the internet of things, and is particularly suitable for transmission of information with small data volume.
However, with the rapid development of LoRa, existing software and hardware development tools and test instruments cannot completely adapt to the development of LoRa. Especially for the test of the LoRa radio frequency index, a dedicated software and hardware development tool and a dedicated test instrument are lacked, which affects the development and test efficiency of the LoRa product, and further restricts the development of the LoRa.
The conventional LoRa radio frequency index testing method mainly performs quantitative testing on some passive indexes, wherein the passive indexes mainly comprise a Voltage Stabilizing Wave Ratio (VSWR), Efficiency (Efficiency) and the like of an antenna; for the test of active indexes (such as receiving sensitivity, sending power and the like) of a whole machine product and outdoor field test, because a standard LoRa signal generating source is lacked, a matched special test tool and a matched scheme are not provided for realizing the configuration of LoRa modulation parameters, an upper computer is required to be connected for configuring the LoRa modulation parameters, then a configuration file is generated and stored on a general signal generator, and the test efficiency and the accuracy of a test result are influenced.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a loRa signal generation device and system to alleviate the not high problem of efficiency of software testing and test result's accuracy that exists among the current loRa radio frequency index test method.
In a first aspect, an embodiment of the present invention provides a LoRa signal generator, the signal generator includes: a human-computer interaction device and a singlechip; the human-computer interaction device is arranged outside the shell of the signal generator and used for interacting information with a user, the single chip microcomputer is arranged in the shell, and the human-computer interaction device is in communication connection with the single chip microcomputer; the signal generator also comprises a signal receiving circuit and a signal transmitting circuit; the single chip microcomputer is used for receiving a configuration instruction of a user through the human-computer interaction device and sending a modulation instruction corresponding to the configuration instruction to the signal receiving circuit and/or the signal sending circuit; and the signal receiving circuit and/or the signal sending circuit are/is used for receiving the modulation instruction and adjusting the circuit parameters to the parameters corresponding to the modulation instruction.
In combination with the first aspect, an embodiment of the present invention provides the first implementation manner of the first aspect, wherein the human-computer interaction device includes a display screen and a physical button, which are in communication connection with the single chip microcomputer; the display screen is used for displaying human-computer interaction information; the physical keys are used for transmitting pressing signals to the single chip microcomputer.
With reference to the first aspect, an embodiment of the present invention provides a second implementation manner of the first aspect, where the physical keys include a direction control key set and a parameter input key set; the direction control key group consists of a plurality of direction control keys corresponding to different directions; the parameter input key group is composed of a plurality of parameter input keys corresponding to different functions.
In combination with the first aspect, an embodiment of the present invention provides a third implementation manner of the first aspect, wherein the human-computer interaction device includes a touch screen, and the touch screen is used for implementing human-computer interaction.
With reference to the first aspect, an embodiment of the present invention provides a fourth implementation manner of the first aspect, wherein the signal receiving circuit includes: the low noise amplifier is connected with the signal receiver, the low noise amplifier, the down converter, the analog-to-digital converter pair and the LoRa demodulator in sequence; the low-noise amplifier is used for receiving a remote LoRa signal output by the tested equipment through the signal receiver, amplifying the remote LoRa signal and outputting an amplified signal corresponding to the remote LoRa signal; the down converter is used for receiving the amplified signal, performing down conversion on the amplified signal, and outputting an in-phase quadrature signal corresponding to the amplified signal; the analog-to-digital converter pair is used for receiving the in-phase orthogonal signal, performing analog-to-digital conversion on the in-phase orthogonal signal and outputting a digital signal corresponding to the in-phase orthogonal signal; and the LoRa demodulator is used for receiving the digital signal and demodulating the digital signal.
In combination with the first aspect, an embodiment of the present invention provides a fifth implementation manner of the first aspect, wherein the signal sending circuit includes: the low-power-consumption power amplifier comprises a LoRa modulator, an up-converter, a power amplifier and a signal transmitter which are connected in sequence; the LoRa modulator is used for receiving the local baseband signal of the signal generator, modulating the local baseband signal and outputting a modulation signal corresponding to the local baseband signal; the up-converter is used for receiving the modulation signal, up-converting the modulation signal and outputting a high-frequency signal corresponding to the modulation signal; and the power amplifier is used for receiving the high-frequency signal, performing power amplification on the high-frequency signal, and outputting a local LoRa signal corresponding to the high-frequency signal through the signal transmitter so that the tested equipment can receive the local LoRa signal.
In combination with the first aspect, an embodiment of the present invention provides a sixth implementation manner of the first aspect, wherein the signal generator is configured with an SMA interface.
With reference to the first aspect, an embodiment of the present invention provides a seventh implementation manner of the first aspect, wherein the signal generator further includes an antenna; the antenna is connected with the signal generator through the SMA interface; the antenna is used for receiving a remote LoRa signal output by the transmitting equipment to be tested and/or the receiving equipment to be tested and sending the remote LoRa signal to the signal generator through the SMA interface; the antenna is also used for receiving the local LoRa signal output by the signal generator through the SMA interface and sending the local LoRa signal to the tested transmitting equipment and/or the tested receiving equipment.
In combination with the first aspect, an embodiment of the present invention provides an eighth implementation manner of the first aspect, wherein the signal generator is configured with an antenna switch connected to the single chip microcomputer.
In a second aspect, an embodiment of the present invention further provides a LoRa system, including the signal generator described in any of the above embodiments, further including a target device communicatively connected to the signal generator, where the target device includes: the device comprises a tested receiving device and/or a tested transmitting device; the signal generator is further configured to send a local LoRa signal to the target device, and generate a test result according to a response signal returned by the target device; and receiving a remote LoRa signal sent by the target equipment, and generating a test result according to the remote LoRa signal.
The utility model provides a loRa signal generator and loRa system sets up the man-machine interaction device that is used for with user's interaction information in the casing outside of signal generator, sets up the singlechip with man-machine interaction device communication connection in the casing, has improved signal generator's portability; the signal generator also comprises a signal receiving circuit and a signal sending circuit, the single chip microcomputer can receive a configuration instruction of a user through the man-machine interaction device and send a modulation instruction corresponding to the configuration instruction to the signal receiving circuit and/or the signal sending circuit, and then the signal receiving circuit and/or the signal sending circuit adjust circuit parameters to parameters corresponding to the modulation instruction. Parameters (such as amplitude, frequency band, bandwidth, spread spectrum and the like) of the LoRa signal can be rapidly configured through the signal generator, a credible standard LoRa signal source is provided for the tested equipment, and the testing efficiency and the accuracy of the testing result are improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an LoRa signal generator according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a second LoRa signal generator according to an embodiment of the present invention;
fig. 3 is an external schematic view of a second LoRa signal generator according to an embodiment of the present invention;
fig. 4 is an internal schematic diagram of a second LoRa signal generator according to an embodiment of the present invention;
fig. 5 is a structural diagram of an internal circuit of a second LoRa signal generator according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a third LoRa signal generator according to an embodiment of the present invention.
Icon: 1-a human-computer interaction device; 11-a display screen; 12-physical keys; 121-direction control key set; 122-parameter input key set; 13-a touch screen; 2, a singlechip; 3-a signal receiving circuit; 4-a signal transmitting circuit; 5-a shell; 6-SMA interface; 7-an antenna; 8-an antenna switch; 9-data acquisition interface.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Some embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.
The embodiment of the utility model provides a first kind loRa signal generator, as shown in fig. 1, this signal generator includes man-machine interaction device 1, singlechip 2, signal receiving circuit 3 and signal transmission circuit 4; the man-machine interaction device 1 is arranged outside the shell of the signal generator; the singlechip 2 is arranged in the shell; the human-computer interaction device 1 is in communication connection with the singlechip 2. The human-computer interaction device 1 is used for interacting information with a user. The man-machine interaction device 1 can select common components such as physical keys, a display screen and the like to be freely combined according to actual needs.
When the tested equipment is receiving equipment, the singlechip 2 is used for receiving a configuration instruction of a user through the human-computer interaction device 1 and sending a modulation instruction corresponding to the configuration instruction to the signal sending circuit 4; the signal sending circuit 4 is used for receiving the modulation instruction, and adjusting the circuit parameters to the parameters corresponding to the modulation instruction so as to meet the waveform requirements of the LoRa signal under different conditions; the LoRa signal generator can output a modulated local LoRa signal to the tested receiving equipment through the signal transmitting circuit 4; after receiving the local LoRa signal, the tested receiving equipment outputs a remote LoRa signal corresponding to the local LoRa signal to the LoRa signal generator; after receiving the remote loRa signal, the LoRa signal generator compares the remote loRa signal with a local loRa signal output to the tested receiving equipment, and then obtains the error rate of the received signal of the tested receiving equipment.
When the tested device is a transmitting device, the transmitting device to be tested outputs a remote LoRa signal to the LoRa signal generator; the LoRa signal generator may receive the remote LoRa signal through the signal receiving circuit 3; the single chip microcomputer 2 is used for receiving a configuration instruction of a user through the human-computer interaction device 1 and sending a modulation instruction corresponding to the configuration instruction to the signal receiving circuit 3; the signal receiving circuit 3 is used for receiving the modulation instruction, and adjusting the circuit parameters to the parameters corresponding to the modulation instruction so as to meet the waveform requirements of the LoRa signal under different conditions; and then the LoRa signal generator outputs a local LoRa signal corresponding to the remote LoRa signal to the tested transmitting equipment, and compares the local LoRa signal with the previously received remote LoRa signal output by the tested receiving equipment, so as to obtain the error rate of the signal sent by the tested transmitting equipment.
The parameters mainly include center frequency, signal strength, Spreading Factor (Spreading Factor), Bandwidth (Bandwidth), Coding Rate (Coding Rate), Packet Configuration (Packet Configuration), and the like, and can be selected according to actual needs.
In the first LoRa signal generator, the man-machine interaction device for interacting information with a user is arranged outside the shell of the signal generator, and the single chip microcomputer in communication connection with the man-machine interaction device is arranged in the shell, so that the portability of the signal generator is improved; the signal generator also comprises a signal receiving circuit and a signal sending circuit, the single chip microcomputer can receive a configuration instruction of a user through the man-machine interaction device and send a modulation instruction corresponding to the configuration instruction to the signal receiving circuit and/or the signal sending circuit, and then the signal receiving circuit and/or the signal sending circuit adjust circuit parameters to parameters corresponding to the modulation instruction. Parameters (such as amplitude, frequency band, bandwidth, spread spectrum and the like) of the LoRa signal can be rapidly configured through the signal generator, a credible standard LoRa signal source is provided for the tested equipment, and the testing efficiency and the accuracy of the testing result are improved.
On the basis of above-mentioned first kind loRa signal generator, the embodiment of the utility model provides a second kind loRa signal generator still is provided. As shown in fig. 2, the signal generator comprises a human-computer interaction device 1, a single chip microcomputer 2, a signal receiving circuit 3 and a signal sending circuit 4; the man-machine interaction device 1 is arranged outside the shell of the signal generator; the singlechip 2 is arranged in the shell; the man-machine interaction device 1 comprises a display screen 11 and a physical key 12 which are in communication connection with the single chip microcomputer.
The display screen 11 is used for displaying human-computer interaction information, so that a user can know a parameter configuration process and a parameter configuration result through the display screen 11. The user can generate a pressing signal by pressing the physical key 12, and the physical key 12 is used for transmitting the pressing signal to the single chip microcomputer 2, so that the single chip microcomputer receives a configuration instruction of the user and sends a modulation instruction corresponding to the configuration instruction to the signal receiving circuit 3 and/or the signal sending circuit 4, and further the signal receiving circuit 3 and/or the signal sending circuit 4 adjust the circuit parameter to a parameter corresponding to the modulation instruction.
In order to further facilitate the user to configure different parameters, the layout mode of the physical keys is optimized. The physical keys can also comprise a direction control key group and a parameter input key group; the direction control key group consists of a plurality of direction control keys corresponding to different directions; the parameter input key group is composed of a plurality of parameter input keys corresponding to different functions.
Taking fig. 3 as an example, in fig. 3, the front side of the housing 5 of the signal generator is provided with direction control keys respectively corresponding to the upper, lower, left and right directions, and the four direction control keys jointly form a direction control key group 121; the front side of the housing 5 of the signal generator is provided with 12 parameter input keys below the direction control key group 121, wherein the 12 parameter input keys comprise 9 keys with digital characters, one key with 'DEL' characters and one key with 'OK' characters, and the 12 parameter input keys jointly form a parameter input key group 122.
In order to realize communication, the signal generator is provided with an SMA interface. The SMA interface can meet the requirements of different test environments.
When conducting indoor conduction test, the SMA interface can be used for connecting a communication wire, so that wired signal transmission between the signal generator and the tested device (transmitting device and/or receiving device) is realized.
When the field measurement is carried out, the SMA interface can be used for connecting an antenna, so that the signal generator and the nearby tested device (transmitting device and/or receiving device) can carry out wireless signal transmission.
When the tested device is a receiving device, the signal generator can output the modulated local LoRa signal to the tested receiving device through the antenna, and then the signal generator can also receive the remote LoRa signal corresponding to the local LoRa signal output by the tested receiving device through the antenna, so that the performance test of the tested receiving device is completed.
When the tested device is a transmitting device, the signal generator can receive a remote LoRa signal output by the tested transmitting device through the antenna, and then the signal generator can also output a local LoRa signal corresponding to the remote LoRa signal to the tested transmitting device through the antenna, so that the performance of the tested transmitting device is tested.
Taking fig. 3 as an example, in fig. 3, the SMA interface 6 is located at the top of the housing 5 of the signal generator, the antenna 7 is fixedly connected with the SMA interface 6, and the shape of the lower end of the antenna 7 is matched with the shape of the SMA interface 6.
On the basis that the signal generator is provided with the antenna through the SMA interface, the signal generator can be also provided with an antenna switch connected with the singlechip for controlling the starting and the closing of the antenna.
Taking fig. 3 as an example, in fig. 3, the antenna switch 8 is located at the right side of the housing 5 of the signal generator, and the antenna switch 8 is set as a dial key having two shift positions in the vertical direction; one of the gears is provided with an OFF character which represents that the antenna is turned OFF; the other gear has the word "ON" and represents the start of the antenna.
In order to facilitate the collection of the parameter configuration data in the signal generator, the signal generator may further include a data collection interface.
Taking fig. 3 as an example, in fig. 3, the data acquisition interface 9 is located on the right side of the housing 5 of the signal generator. The data acquisition interface 9 can be selected as a common interface (such as a universal USB interface) according to actual needs.
In the process of using the signal generator, the signal receiving circuit receives a remote LoRa signal (which is an analog signal) sent by the tested device to the LoRa signal generator, and the remote LoRa signal is further converted into a local digital signal, so that the signal generator performs corresponding circuit parameter configuration, and further completes subsequent testing work.
Based on this, as shown in fig. 4, the signal receiving circuit includes: the digital-to-analog converter comprises a signal receiver, a low noise amplifier, a down converter, an analog-to-digital converter pair (consisting of two analog-to-digital converters) and a LoRa demodulator which are connected in sequence. For ease of description, in fig. 4, RX represents the signal receiver, Mixer represents the down-converter, and ADC represents the analog-to-digital converter pair.
And the low-noise amplifier is used for receiving the remote LoRa signal output by the tested equipment through the signal receiver, amplifying the remote LoRa signal and outputting an amplified signal corresponding to the remote LoRa signal. And the down converter is used for receiving the amplified signal, performing down conversion on the amplified signal and outputting an in-phase quadrature signal corresponding to the amplified signal. And the analog-to-digital converter pair is used for receiving the in-phase orthogonal signal (I/Q), performing analog-to-digital conversion on the in-phase orthogonal signal and outputting a digital signal corresponding to the in-phase orthogonal signal. And the LoRa demodulator is used for receiving the digital signal and demodulating the digital signal.
In the process of using the signal generator, the signal generator generates a local baseband signal (which is a digital signal), and the local baseband signal needs to be further converted into a local LoRa signal by the signal transmitting circuit, and the local LoRa signal is output, so that the device under test receives the local LoRa signal to complete the subsequent test operation.
Based on this, as shown in fig. 4, the signal transmission circuit includes: the low-power-consumption high-power-consumption low-power-consumption power amplifier comprises a LoRa modulator, an up-converter, a power amplifier and a signal transmitter which are sequentially connected. For convenience of description, in fig. 4, the up-converter is represented by LO, the power amplifier is represented by PA, and the signal transmitter is represented by TX.
And the LoRa modulator is used for receiving the local baseband signal of the signal generator, modulating the local baseband signal and outputting a modulation signal corresponding to the local baseband signal. And the up-converter is used for receiving the modulation signal, up-converting the modulation signal and outputting a high-frequency signal corresponding to the modulation signal. And the power amplifier is used for receiving the high-frequency signal, performing power amplification on the high-frequency signal, and outputting a local LoRa signal corresponding to the high-frequency signal through the signal transmitter so that the receiving equipment to be tested can receive the local LoRa signal.
Fig. 5 shows a specific internal circuit structure of the second LoRa signal generator, which is not described again.
In the second LoRa signal generator, the man-machine interaction device for interacting information with the user is arranged outside the shell of the signal generator, and the singlechip is arranged in the shell, so that the portability of the signal generator is improved; the signal generator further comprises a signal receiving circuit and a signal sending circuit, the man-machine interaction device comprises a display screen and a physical key which are in communication connection with the single chip microcomputer, and the pressing signal is transmitted to the single chip microcomputer through the physical key so that the single chip microcomputer can receive a configuration instruction of a user and send a modulation instruction corresponding to the configuration instruction to the signal receiving circuit and/or the signal sending circuit, and then the signal receiving circuit and/or the signal sending circuit can adjust circuit parameters to parameters corresponding to the modulation instruction. Parameters (such as amplitude, frequency band, bandwidth, spread spectrum and the like) of the LoRa signal can be rapidly configured through the signal generator, a credible standard LoRa signal source is provided for the tested equipment, and the testing efficiency and the accuracy of the testing result are improved. In addition, the signal generator is provided with the SMA interface, so that different testing conditions of wired signals and wireless signals can be met, and the signal generator has better universality in different testing environments.
On the basis of above-mentioned first kind loRa signal generator, the embodiment of the utility model provides a still provides third kind loRa signal generator. As shown in fig. 6, the signal generator includes a human-computer interaction device 1, a single chip microcomputer 2, a signal receiving circuit 3 and a signal sending circuit 4; the man-machine interaction device 1 is arranged outside the shell of the signal generator; the singlechip 2 is arranged in the shell; the man-machine interaction device 1 comprises a touch screen 13 which is in communication connection with the single chip microcomputer 2.
The touch screen 13 is used for realizing human-computer interaction. The user can touch the touch screen 13, so that the single chip microcomputer receives the configuration instruction of the user through the touch screen 13, and sends a modulation instruction corresponding to the configuration instruction to the signal receiving circuit and/or the signal sending circuit, and further the signal receiving circuit and/or the signal sending circuit adjusts the circuit parameter to the parameter corresponding to the modulation instruction. The user can know the parameter configuration process and the parameter configuration result through the display function of the touch screen 13.
In the third LoRa signal generator, the human-computer interaction device includes a touch screen in communication connection with the single-chip microcomputer, and the single-chip microcomputer receives a configuration instruction of a user through the touch screen and sends a modulation instruction corresponding to the configuration instruction to the signal receiving circuit and/or the signal sending circuit, so that the signal receiving circuit and/or the signal sending circuit adjust a circuit parameter to a parameter corresponding to the modulation instruction. Parameters (such as amplitude, frequency band, bandwidth, spread spectrum and the like) of the LoRa signal can be rapidly configured through the signal generator, a credible standard LoRa signal source is provided for the tested equipment, and the testing efficiency and the accuracy of the testing result are improved. In addition, the signal generator is provided with the SMA interface, so that different testing conditions of wired signals and wireless signals can be met, and the signal generator has better universality in different testing environments.
The embodiment of the utility model provides a still provide a loRa system, this system include any kind of signal generator that above-mentioned embodiment provided and with this signal generator communication connection's target device, the target device includes: a receiving device under test and/or a transmitting device under test.
The signal generator is used for sending a local LoRa signal to the target equipment and generating a test result according to a response signal (corresponding to the local LoRa signal) returned by the target equipment; and receiving a remote LoRa signal sent by the target equipment, and generating a test result according to the remote LoRa signal.
The specific working process and the generated effect of the system are similar to the corresponding contents of the signal generator provided in the above embodiments, and are not described herein again.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.
Claims (10)
1. A LoRa signal generator, comprising: a human-computer interaction device and a singlechip; the human-computer interaction device is arranged outside the shell of the signal generator and used for interacting information with a user, the single chip microcomputer is arranged in the shell, and the human-computer interaction device is in communication connection with the single chip microcomputer;
the signal generator also comprises a signal receiving circuit and a signal transmitting circuit;
the single chip microcomputer is used for receiving a configuration instruction of a user through the human-computer interaction device and sending a modulation instruction corresponding to the configuration instruction to the signal receiving circuit and/or the signal sending circuit;
and the signal receiving circuit and/or the signal sending circuit are/is used for receiving the modulation instruction and adjusting the circuit parameters to the parameters corresponding to the modulation instruction.
2. The signal generator of claim 1, wherein the human-computer interaction device comprises a display screen and physical keys in communication connection with the single-chip microcomputer; the display screen is used for displaying human-computer interaction information; the physical keys are used for transmitting pressing signals to the single chip microcomputer.
3. The signal generator of claim 2, wherein the physical keys comprise a set of directional control keys and a set of parameter input keys; the direction control key group consists of a plurality of direction control keys corresponding to different directions; the parameter input key group is composed of a plurality of parameter input keys corresponding to different functions.
4. The signal generator of claim 1, wherein the human interaction device comprises a touch screen for human interaction.
5. The signal generator of claim 1, wherein the signal receiving circuit comprises: the low noise amplifier is connected with the signal receiver, the low noise amplifier, the down converter, the analog-to-digital converter pair and the LoRa demodulator in sequence;
the low-noise amplifier is used for receiving a remote LoRa signal output by the tested equipment through the signal receiver, amplifying the remote LoRa signal and outputting an amplified signal corresponding to the remote LoRa signal;
the down converter is used for receiving the amplified signal, performing down conversion on the amplified signal, and outputting an in-phase quadrature signal corresponding to the amplified signal;
the analog-to-digital converter pair is used for receiving the in-phase orthogonal signal, performing analog-to-digital conversion on the in-phase orthogonal signal and outputting a digital signal corresponding to the in-phase orthogonal signal;
and the LoRa demodulator is used for receiving the digital signal and demodulating the digital signal.
6. The signal generator of claim 1, wherein the signal transmission circuit comprises: the low-power-consumption power amplifier comprises a LoRa modulator, an up-converter, a power amplifier and a signal transmitter which are connected in sequence;
the LoRa modulator is used for receiving the local baseband signal of the signal generator, modulating the local baseband signal and outputting a modulation signal corresponding to the local baseband signal;
the up-converter is used for receiving the modulation signal, up-converting the modulation signal and outputting a high-frequency signal corresponding to the modulation signal;
and the power amplifier is used for receiving the high-frequency signal, performing power amplification on the high-frequency signal, and outputting a local LoRa signal corresponding to the high-frequency signal through the signal transmitter so that the tested equipment can receive the local LoRa signal.
7. The signal generator of claim 1, wherein the signal generator is configured with an SMA interface.
8. The signal generator of claim 7, further comprising an antenna; the antenna is connected with the signal generator through the SMA interface;
the antenna is used for receiving a remote LoRa signal output by the tested equipment and sending the remote LoRa signal to the signal generator through the SMA interface;
the antenna is also used for receiving the local LoRa signal output by the signal generator through the SMA interface and sending the local LoRa signal to the tested equipment.
9. The signal generator of claim 8, wherein the signal generator is configured with an antenna switch connected to the single-chip microcomputer.
10. An LoRa system, comprising the signal generator of any of claims 1-9, and a target device communicatively coupled to the signal generator, the target device comprising: the device comprises a tested receiving device and/or a tested transmitting device;
the signal generator is used for sending a local LoRa signal to the target equipment and generating a test result according to a response signal returned by the target equipment; and receiving a remote LoRa signal sent by the target equipment, and generating a test result according to the remote LoRa signal.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115063955A (en) * | 2022-06-21 | 2022-09-16 | 青岛合启立智能科技有限公司 | Cold chain platform alarm control system and alarm method |
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