CN209215492U - A kind of NB-IoT signal test system - Google Patents
A kind of NB-IoT signal test system Download PDFInfo
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- CN209215492U CN209215492U CN201821600508.5U CN201821600508U CN209215492U CN 209215492 U CN209215492 U CN 209215492U CN 201821600508 U CN201821600508 U CN 201821600508U CN 209215492 U CN209215492 U CN 209215492U
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Abstract
The utility model relates to testing fields, especially a kind of NB-IoT signal test system, it include: remote server and handheld test device, handheld test device includes NB communications module, main control MCU, first display module, power supply module and microUSB interface module, main control MCU connects NB communications module and the first display module, power supply module includes power module, first power supply circuit, second power supply circuit and decompression converting circuit, power module connects microUSB interface module, first power supply circuit, second power supply circuit and decompression converting circuit, first power supply circuit includes sequentially connected first prime filter circuit, power supply voltage stabilizing chip U1 and the first rear class filtering circuit.Following effect may be implemented in the utility model: handheld test device is easy to carry, easy to use；By microUSB interface module, power supply mode is simple；Using the independent power supply circuit of two-way, when preventing the first display module from working, the supply voltage of other modules is pulled low.
Description
Technical field
The utility model relates to Internet of Things instrument communication test field more particularly to a kind of NB-IoT signal test systems.
Background technique
NB-IoT terminal device currently on the market is before use, be usually in client user, terminal manufacturer and to work as
Lower completion is coordinated jointly by ground operator, and the NB-IoT that operator needs to open local base station before terminal comes into operation first believes
Number, and drive test and optimization are carried out to the ground network.Secondly, terminal manufacturer is in investment product before use, needing the technology of profession
Personnel carry professional test equipment or actual product is tested, if expection is not achieved in discovery signal covering, need to contact fortune
It seeks quotient and carries out network tuning.Finally, if product communication success rate decline occurs in product, being needed after sale in client's use process
Personnel contact client and operator carries out signal testing together.
Operator needs independent carried terminal and notebook in test network environment, and convenience is poor.In long-time to certain
When earth signal is monitored, often because battery not enough terminates test in advance.
Utility model content
To solve the above problems, the utility model proposes a kind of portable NB-IoT signal test systems.
A kind of NB-IoT signal test system, comprising: remote server and hand-held with remote server communication connection
Test device, the handheld test device include NB communications module, main control MCU, the first display module, power supply module and
MicroUSB interface module,
The NB communications module and remote server realize interactive correspondence,
The main control MCU connection NB communications module and the first display module,
The power supply module includes power module, the first power supply circuit, the second power supply circuit and decompression converting circuit, institute
Power module connection microUSB interface module, the first power supply circuit, the second power supply circuit and decompression converting circuit are stated, it is described
First power supply circuit includes sequentially connected first prime filter circuit, power supply voltage stabilizing chip U1 and the first rear class filtering electricity
Road, the first prime filter circuit connect power module, the first rear class filtering circuit connection main control MCU, the decompression
Conversion circuit connects NB communications module and main control MCU, and second power supply circuit connects the first display module.
Preferably, the first prime filter circuit includes capacitor C1, C2, and one end of the capacitor C1 connects power supply pressure stabilizing
The input terminal of chip U1, other end ground connection, the input terminal of one end connection power supply voltage stabilizing chip U1 of the capacitor C2, another termination
Ground.
Preferably, the first rear class filtering circuit includes capacitor C3, C4, C39, and one end of the capacitor C3 connects power supply
The output end of voltage stabilizing chip U1, other end ground connection, the output end of one end connection power supply voltage stabilizing chip U1 of the capacitor C4 are another
End ground connection, the output end of one end connection power supply voltage stabilizing chip U1 of the capacitor C39, other end ground connection.
Preferably, second power supply circuit includes sequentially connected second prime filter circuit, power supply voltage stabilizing chip U2
And the second rear class filtering circuit, the second prime filter circuit connect power module, the first rear class filtering circuit connects
Connect the first display module.
Preferably, the second prime filter circuit includes capacitor C5, C6, and one end of the capacitor C5 connects power supply pressure stabilizing
The input terminal of chip U2, other end ground connection, the input terminal of one end connection power supply voltage stabilizing chip U2 of the capacitor C6, another termination
Ground.
Preferably, the second rear class filtering circuit includes capacitor C7, C8, and one end of the capacitor C7 connects power supply pressure stabilizing
The output end of chip U2, other end ground connection, the output end of one end connection power supply voltage stabilizing chip U2 of the capacitor C8, another termination
Ground.
Preferably, the decompression converting circuit include buck converter U6, third filter circuit, capacitor C36, C37,
C38, resistance R44, R45, R46, R49 and inductance L1, the first, second and third pin of the buck converter U6 are separately connected electricity
Feel one end of L1, one end, third filter circuit and the buck converter U6 of the other end connection resistance R44 of the inductance L1
The 14th pin, the resistance R44 the other end connection resistance R46 one end and buck converter U6 the 5th pin,
One end of the 4th pin connection resistance R45 of the buck converter U6, the other end of described resistance R45, R46 and decompression turn
Parallel operation U6 the 15th, 16 pins be grounded respectively, the buck converter U6 the ten, the 11,12 pins are separately connected
Power input, one end of the 13rd pin connection resistance R49 of the buck converter U6, the other end of the resistance R49
Connect main control MCU, the buck converter U6 the seven, the eight, 17 pins be grounded respectively, the 9th of the buck converter U6 the
Pin connects one end of capacitor C38, and the other end ground connection of the capacitor C38, one end of described capacitor C36, C37 are separately connected
Power input, other end ground connection.
Preferably, the third filter circuit include capacitor C29, C30 successively in parallel, C31, C32, C33, C34,
C35。
Preferably, the NB communications module include NB communication module and the first antenna seat being connect with NB communication module,
Second antenna pedestal and plug-in interface.
It preferably, further include the second display module being connect with main control MCU.
By using the utility model, following effect may be implemented:
1. handheld test device is easy to carry, easy to use；When power supply module electricity shortage, connect by microUSB
The power supply units such as mouth mold block connection computer, charger baby are powered, and power supply mode is simple and diversified；Use the independent confession of two-way
Circuit, wherein powering all the way to the first display module, another way gives other module for power supply, prevents the first display module from working
When, the supply voltage of other modules is pulled low and influences work；It is independent to use decompression for the input over-voltage for avoiding NB communications module
Conversion circuit powers output after input decompression to NB communications module.
2. the first display module and the second display module are used, when some display module fails wherein, another
Display module still is able to work；
3. using first antenna seat, the second antenna pedestal, different antennas can be selected to be communicated as required；Using slotting
Formula interface is pulled out, the replacement of NB communications module is facilitated.
Detailed description of the invention
Utility model will be further described in detail below with reference to the attached drawings and specific embodiments.
Fig. 1 is the connection schematic diagram of the utility model embodiment；
Fig. 2 is the circuit diagram of microUSB interface module in the utility model embodiment；
Fig. 3 is the structural schematic diagram of power supply module in the utility model embodiment；
Fig. 4 is the circuit diagram of the first power supply circuit in the utility model embodiment；
Fig. 5 is the circuit diagram of the second power supply circuit in the utility model embodiment；
Fig. 6 is the circuit diagram of decompression converting circuit in the utility model embodiment；
Fig. 7 is the connection schematic diagram of memory module in the utility model embodiment；
Fig. 8 is the connection schematic diagram of the second display module in the utility model embodiment；
Fig. 9 is the circuit diagram of key module in the utility model embodiment；
Figure 10 is the connection schematic diagram of NB communications module in the utility model embodiment.
Specific embodiment
Below in conjunction with attached drawing, the technical solution of the utility model is further described, but the utility model and unlimited
In these embodiments.
As shown in Figure 1, a kind of NB-IoT signal test system, comprising: remote server and with remote server communicate
The handheld test device of connection.Handheld test device include NB communications module, main control MCU, the first display module, power supply module with
And microUSB interface module, NB communications module and remote server realize interactive correspondence, main control MCU connect NB communications module with
And first display module, power supply module are connect with NB communications module, main control MCU, the first display module, microUSB interface mould
Block connects power supply module.Handheld test device is easy to carry, easy to use；Pass through microUSB interface module, power supply mode letter
It is single.
In the present embodiment, remote server issues test instruction, and handheld test device passes through NB communications module, master control
MCU carries out uplink and downlink test, repeats to send upstream data, remote server calculates data correctness and packet loss downlink to hand-held
Test device simultaneously records.Similarly, the first display module shows test result and uploads test result downlink test result,
Remote server can generate complete test report according to corresponding test result.It should be noted that the NB-IoT in the present embodiment
The test method of signal is the prior art, and the present embodiment does not make improvements.
As shown in Fig. 2, microUSB interface module includes microUSB interface P4, Schottky diode D3, resistance R51.
The anode of the first pin connection Schottky diode D3 of microUSB interface P4, the cathode connection+5v of Schottky diode D3,
The second pin of microUSB interface P4, third pin be negative, positive supply input terminal, and negative, positive power input can connect notebook
Or charger baby, power supply mode is simple, is convenient for carrying, connected after the 5th pin series resistor R51 of microUSB interface P4+
5v。
As shown in figure 3, power supply module includes that power module and the first power supply circuit, the second power supply circuit and decompression turn
Circuit is changed, power module connects microUSB interface module, the first power supply circuit, the second power supply circuit and decompression conversion electricity
Road, the first power supply circuit connect main control MCU, memory module, the decompression converting circuit connection NB communications module and master control
MCU, second power supply circuit connect the first display module.In the present embodiment, it using the independent power supply circuit of two-way, prevents
When first display module works, the supply voltage of other modules is pulled low；It is independent to use to avoid NB communications module from inputting over-voltage
Output is powered to NB communications module after decompression converting circuit decompression.
As shown in figure 4, the first power supply circuit include sequentially connected first prime filter circuit, power supply voltage stabilizing chip U1 with
And the first rear class filtering circuit, the first prime filter circuit connect power module, the first rear class filtering circuit connection main control MCU.
Wherein, the first prime filter circuit includes capacitor C1, C2；First rear class filtering circuit includes capacitor C3, C4, C39.Capacitor C1's
One end connects the input terminal of power supply voltage stabilizing chip U1, and other end ground connection, one end connection power supply voltage stabilizing chip U1's of capacitor C2 is defeated
Entering end, other end ground connection, one end of capacitor C3 connects the output end of power supply voltage stabilizing chip U1, and the other end is grounded, and the one of capacitor C4
The output end of end connection power supply voltage stabilizing chip U1, other end ground connection, one end connection power supply voltage stabilizing chip U1's of capacitor C39 is defeated
Outlet, the other end ground connection, power supply voltage stabilizing chip U1 input terminal connection+5V input, power supply voltage stabilizing chip U1 output end connection+
3V output, power supply voltage stabilizing chip U1 model GM6250-3.0ST89R.
As shown in figure 5, the second power supply circuit include sequentially connected second prime filter circuit, power supply voltage stabilizing chip U2 with
And the second rear class filtering circuit, the second prime filter circuit connect power module, the first rear class filtering circuit connection
First display module.Wherein, the second prime filter circuit includes capacitor C5, C6；Second rear class filtering circuit include capacitor C7,
C8.The input terminal of one end connection power supply voltage stabilizing chip U2 of the capacitor C5, one end of other end ground connection, the capacitor C6 connects
Connect the input terminal of power supply voltage stabilizing chip U2, other end ground connection, the output of one end connection power supply voltage stabilizing chip U2 of the capacitor C7
End, other end ground connection, the output end of one end connection power supply voltage stabilizing chip U2 of the capacitor C8, other end ground connection, power supply pressure stabilizing
Input terminal connection+the 5V of chip U2 is inputted, and output end connects the first display module, power supply voltage stabilizing chip U2 model GM6250-
3.0ST89R。
As shown in fig. 6, decompression converting circuit include buck converter U6, third filter circuit, capacitor C36, C37, C38,
Resistance R44, R45, R46, R49 and inductance L1, wherein the third filter circuit include capacitor C29, C30 successively in parallel,
C31,C32,C33,C34,C35.The first, second and third pin of the buck converter U6 is separately connected one end of inductance L1, institute
State one end of other end connection resistance R44, one end of capacitor C29, C30, C31, C32, C33, C34, C35 and drop of inductance L1
The 14th pin of pressure converter U6, one end of the other end connection resistance R46 of the resistance R44 and buck converter U6
5th pin, the buck converter U6 the 4th pin connection resistance R45 one end, the capacitor C29, C30, C31, C32,
C33, C34, C35, the 15th of the other end of resistance R45, R46 and buck converter U6 the, 16 pins are grounded respectively, described
Buck converter U6 the ten, the 11,12 pins be separately connected power input+5V, the tenth of the buck converter U6 the
Three pins connect one end of resistance R49, and the other end of the resistance R49 connects main control MCU, and the of the buck converter U6
Seven, eight, 17 pins are grounded respectively, one end of the 9th pin connection capacitor C38 of the buck converter U6, the capacitor
The other end of C38 is grounded, and one end of described capacitor C36, C37 are separately connected power input, other end ground connection, buck converter
The model TLV62130RGTR of U6.
In one embodiment, as shown in fig. 7, this test macro further includes the memory module connecting with main control MCU.For
Test result is stored in memory module, analyzes and traces convenient for network state.
In one embodiment, the first display module uses LCD Liquid Crystal Module, when signal testing result is for the ease of first
Between intuitively obtained by user, in test equipment install additional LCD Liquid Crystal Module, main menu is shown after device power, is being tested
Operational process is shown in the process.
In one embodiment, as shown in figure 8, this test macro further includes the second display module connecting with main control MCU.
Second display module includes the LED light that at least one connect with main control MCU.Complexity is used in order to be further reduced, and in nothing
It arranges in pairs or groups under the premise of LCD Liquid Crystal Module or the damage of LCD Liquid Crystal Module, the light that can be used the display such as LED different shows signal
Test result.
In one embodiment, this test macro further includes the key module connecting with main control MCU.As shown in Fig. 9, press
Key module includes key KEY1, KEY2, KEY3, KEY4, resistance R7, R8, R9, R10, capacitor C10, C11, C12, C13, described
Capacitor C10 is in parallel with key KEY1, and one end ground connection of the key KEY1, the other end connects one end of resistance R7, the resistance
The other end of R7 connects main control MCU.By user key-press, switching menu option determines that test content and return exit menu,
Wherein: key KEY1, KEY2, KEY3, KEY4 access main control MCU, and normality is pulled up respectively by pull-up resistor R7, R8, R9, R10
It is+3V to voltage, after corresponding to by key pressing, is reduced to low level, main control MCU is by identifying that high and low level jump determines key
Release is pressed, according to the definition of key, menu is shown, selects menu, exit interface.
NB communications module is used to carry out data interaction with remote server.As shown in Figure 10, in one embodiment, NB is logical
Believe that mould group includes that NB communication module and the first antenna seat connecting with NB communication module, the second antenna pedestal and plug-in connect
Mouthful, the wherein model BC95-B5 of NB communication module.By first antenna seat, the second antenna pedestal, can select as required not
Same antenna is communicated；Using plug-in interface, facilitate the replacement of NB communications module.
Those skilled in the art of the present invention can do described specific embodiment various
The similar mode of modify or supplement or adopt substitutes, but without departing from the spirit of the present application or surmounts appended right and want
Seek range defined in book.
Claims (10)
1. a kind of NB-IoT signal test system characterized by comprising remote server and with remote server communicate connect
The handheld test device connect, the handheld test device include NB communications module, main control MCU, the first display module, power supply module
And microUSB interface module,
The NB communications module and remote server realize interactive correspondence,
The main control MCU connection NB communications module and the first display module,
The power supply module includes power module, the first power supply circuit, the second power supply circuit and decompression converting circuit, the electricity
Source module connection microUSB interface module, the first power supply circuit, the second power supply circuit and decompression converting circuit, described first
Power supply circuit includes sequentially connected first prime filter circuit, power supply voltage stabilizing chip U1 and the first rear class filtering circuit, institute
State the first prime filter circuit connection power module, the first rear class filtering circuit connection main control MCU, the decompression conversion electricity
Road connects NB communications module and main control MCU, and second power supply circuit connects the first display module.
2. NB-IoT signal test system according to claim 1, which is characterized in that the first prime filter circuit packet
Include capacitor C1, C2, the input terminal of one end connection power supply voltage stabilizing chip U1 of the capacitor C1, other end ground connection, the capacitor C2
One end connection power supply voltage stabilizing chip U1 input terminal, the other end ground connection.
3. NB-IoT signal test system according to claim 1, which is characterized in that the first rear class filtering circuit packet
Include capacitor C3, C4, C39, the output end of one end connection power supply voltage stabilizing chip U1 of the capacitor C3, other end ground connection, the electricity
Hold the output end of one end connection power supply voltage stabilizing chip U1 of C4, one end of other end ground connection, the capacitor C39 connects power supply pressure stabilizing
The output end of chip U1, other end ground connection.
4. NB-IoT signal test system according to claim 1, which is characterized in that second power supply circuit include according to
The second prime filter circuit, power supply voltage stabilizing chip U2 and the second rear class filtering circuit of secondary connection, the second prime filtering
Circuit connection power module, the first display module of the first rear class filtering circuit connection.
5. NB-IoT signal test system according to claim 4, which is characterized in that the second prime filter circuit packet
Include capacitor C5, C6, the input terminal of one end connection power supply voltage stabilizing chip U2 of the capacitor C5, other end ground connection, the capacitor C6
One end connection power supply voltage stabilizing chip U2 input terminal, the other end ground connection.
6. NB-IoT signal test system according to claim 4, which is characterized in that the second rear class filtering circuit packet
Include capacitor C7, C8, the output end of one end connection power supply voltage stabilizing chip U2 of the capacitor C7, other end ground connection, the capacitor C8
One end connection power supply voltage stabilizing chip U2 output end, the other end ground connection.
7. NB-IoT signal test system according to claim 1, which is characterized in that the decompression converting circuit includes drop
Pressure converter U6, third filter circuit, capacitor C36, C37, C38, resistance R44, R45, R46, R49 and inductance L1, the drop
The first, second and third pin of pressure converter U6 is separately connected one end of inductance L1, and the other end of the inductance L1 connects resistance R44
One end, third filter circuit and buck converter U6 the 14th pin, the other end of the resistance R44 connects resistance
One end of R46 and the 5th pin of buck converter U6, the one of the 4th pin connection resistance R45 of the buck converter U6
End, the other end of described resistance R45, R46 and buck converter U6 the 15th, 16 pins be grounded respectively, the decompression
Converter U6 the ten, the 11,12 pins be separately connected power input, the 13rd pin of the buck converter U6 connects
One end of connecting resistance R49, the other end connection main control MCU of the resistance R49, the seven, the eight, the 17 of the buck converter U6
Pin is grounded respectively, one end of the 9th pin connection capacitor C38 of the buck converter U6, the other end of the capacitor C38
Ground connection, one end of described capacitor C36, C37 are separately connected power input, other end ground connection.
8. NB-IoT signal test system according to claim 7, which is characterized in that the third filter circuit include according to
Capacitor C29, C30, C31, C32, C33, C34, C35 of secondary parallel connection.
9. NB-IoT signal test system according to claim 1-8, which is characterized in that the NB communications module
Including NB communication module and the first antenna seat being connect with NB communication module, the second antenna pedestal and plug-in interface.
10. NB-IoT signal test system according to claim 1-8, which is characterized in that further include and master control
Second display module of MCU connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201821600508.5U CN209215492U (en) | 2018-09-29 | 2018-09-29 | A kind of NB-IoT signal test system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821600508.5U CN209215492U (en) | 2018-09-29 | 2018-09-29 | A kind of NB-IoT signal test system |
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| CN201821600508.5U Active CN209215492U (en) | 2018-09-29 | 2018-09-29 | A kind of NB-IoT signal test system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110907000A (en) * | 2019-11-19 | 2020-03-24 | 上海桑锐电子科技股份有限公司 | Unidirectional low-pass filtering blocking circuit and method |
| CN112954725A (en) * | 2021-02-10 | 2021-06-11 | 深圳市汇顶科技股份有限公司 | Test method, communication system and NB-IoT device |
-
2018
- 2018-09-29 CN CN201821600508.5U patent/CN209215492U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110907000A (en) * | 2019-11-19 | 2020-03-24 | 上海桑锐电子科技股份有限公司 | Unidirectional low-pass filtering blocking circuit and method |
| CN112954725A (en) * | 2021-02-10 | 2021-06-11 | 深圳市汇顶科技股份有限公司 | Test method, communication system and NB-IoT device |
| CN112954725B (en) * | 2021-02-10 | 2023-08-01 | 深圳市汇顶科技股份有限公司 | Test method, communication system and NB-IoT device |
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