CN204044568U - There is the gsm module of double card list standby function - Google Patents
There is the gsm module of double card list standby function Download PDFInfo
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- CN204044568U CN204044568U CN201420482760.6U CN201420482760U CN204044568U CN 204044568 U CN204044568 U CN 204044568U CN 201420482760 U CN201420482760 U CN 201420482760U CN 204044568 U CN204044568 U CN 204044568U
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- 238000004891 communication Methods 0.000 claims description 8
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 101000616761 Homo sapiens Single-minded homolog 2 Proteins 0.000 description 52
- 102100021825 Single-minded homolog 2 Human genes 0.000 description 52
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 101000703681 Homo sapiens Single-minded homolog 1 Proteins 0.000 description 1
- 102100031980 Single-minded homolog 1 Human genes 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
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Abstract
The utility model relates to a kind of gsm module with double card list standby function.The technical problems to be solved in the utility model is to provide a kind of simple and reliable, with low cost, gsm module with double card list standby function that antijamming capability is strong.Solve the technical scheme of this problem: the gsm module with double card list standby function, it comprises radio-frequency unit, master control unit, switching part, the first SIM card, the second SIM card and the interface unit of being with antennal interface; Switching part is a single pole double throw analog switch, and its control signal input end is connected with master control unit, connects input end and is connected with radio-frequency unit, and two connect output terminal and are connected with the first SIM card, the second SIM card respectively; First SIM card and two signal wire tie points identical in the second SIM card are connected output terminal respectively and are connected with two of switching part, and in each SIM card, remaining four signal wire tie point one_to_one corresponding is connected to radio-frequency unit after being connected.
Description
Technical field
The utility model relates to a kind of gsm module, particularly a kind of gsm module with double card list standby function.
Background technology
At present, industrial gsm module device, the overwhelming majority all adopts a SIM card to be used as the identification of communication.But find some problems in actual use, wherein main problem is once the unstable networks of the SIM card operator adopted, and equipment can be caused frequently to go offline, have a strong impact on communication effect, particularly some are national abroad, some incomplete area of carrier network base station coverage.In order to address this problem, some producer have employed double card mode, and operator's poor signal, just automatically switches to another one operator.Their scheme is generally that placement one switches chip, and all signal wires of SIM card are switched to another one SIM card from a SIM card.But this switching chip price general charged is somewhat expensive, and delivery cycle is long, affects the quick listing of product, in addition, because all signal wires all pass through this chip, the interference of chip to signal adds many times, can have influence on the identification of SIM card.
Utility model content
The purpose of this utility model is: provide a kind of simple and reliable, with low cost, gsm module with double card list standby function that antijamming capability is strong for above-mentioned Problems existing.
The technical scheme that the utility model adopts is: the gsm module with double card list standby function, is characterized in that: it comprises radio-frequency unit, master control unit, switching part, the first SIM card, the second SIM card and the interface unit of being with antennal interface, wherein,
Radio-frequency unit, is connected with master control unit, judges whether current network signal is better than setting value, then judged result is sent to master control unit for Received signal strength;
Master control unit, be connected with interface unit with radio-frequency unit, switching part respectively, the on the one hand judged result that sends over of received RF parts, and to transmit control signal to switching part according to this judged result and control its action, carry out communication by interface unit and external unit on the other hand;
Switching part, it is a single pole double throw analog switch, its control signal input end is connected with master control unit, connect input end to be connected with radio-frequency unit, two connect output terminal and are connected with the first SIM card, the second SIM card respectively, for receiving the control signal that master control unit sends over, and according to this control signal control linkage input end and two break-makes be connected between output terminal;
First SIM card and two signal wire tie points identical in the second SIM card are connected output terminal respectively and are connected with two of switching part, and in each SIM card, remaining four signal wire tie point one_to_one corresponding is connected to radio-frequency unit after being connected;
Interface unit, is connected with master control unit with external unit respectively, realizes the communication of described gsm module and external unit on the one hand, on the other hand for described gsm module provides power supply.
Described radio-frequency unit comprises rf signal reception assembly, emission of radio frequency signals assembly, and is connected with master control unit with rf signal reception assembly, emission of radio frequency signals assembly respectively for judging whether network signal is better than the radiofrequency signal processing components of setting value.
The model of described radiofrequency signal processing components is XL600.
Described master control unit is that R5F212BC controller and peripheral circuit thereof form by model.
Described switching part employing model is the single pole double throw analog switch of SGM3005XD/TR.
Described first SIM card and the second SIM card are usim card, micro SIM card, SIM chip.
Described interface unit is row's pin, row's seat or golden finger wiring board.
Antennal interface on described radio-frequency unit is SMA interface.
The beneficial effects of the utility model are: 1, in the utility model, the first SIM card and two signal wire tie points identical in the second SIM card are connected output terminal respectively and are connected with two of switching part, and remaining four signal wire tie point one_to_one corresponding is connected to radio-frequency unit after being connected in each SIM card, the signal wire controlling SIM card can realize the mutual switching of SIM card, compared to prior art, not only reduce cost, and improve antijamming capability, implement more simple and reliable, cost performance is high.2, the switching of SIM card can be realized when charged, without the need to shutdown.3, utilize radio-frequency unit to complete the judgement of network signal good job, thus reduce the requirement to master control unit.4, the SIM card kind supported is many, and scope is wide, can be usim card, micro SIM card, SIM chip.
Accompanying drawing explanation
Fig. 1 is theory diagram of the present utility model.
Fig. 2 is circuit theory diagrams of the present utility model.
Embodiment
As shown in Figure 1 and Figure 2, the present embodiment comprises radio-frequency unit 1 (both are connected by microstrip line), master control unit 2, switching part 3, first SIM card 4, second SIM card 5 and the interface unit 6 of being with antennal interface.
Radio-frequency unit 1, comprise rf signal reception assembly, emission of radio frequency signals assembly and radiofrequency signal processing components, described radiofrequency signal processing components (U1, Hangzhou Xun Long Science and Technology Ltd. produces, and model is XL600) be connected with master control unit 2 with rf signal reception assembly, emission of radio frequency signals assembly respectively; Described rf signal reception assembly is used for Received signal strength, and transmits it to radiofrequency signal processing components, and according to this signal, radiofrequency signal processing components judges whether current network signal is better than setting value, then judged result is sent to master control unit 2.
Master control unit 2 is that R5F212BC controller (U2) and peripheral circuit thereof form by model; Be connected with interface unit 6 with radio-frequency unit 1, switching part 3 respectively, air-data is carried out on the one hand mutual with radio-frequency unit 1, the judged result that received RF parts 1 send over, and according to this judged result to switching part 3 transmit control signal control its action, carry out communication by interface unit 6 and external unit on the other hand, transmit data.
Switching part 3, employing model is the single pole double throw analog switch (U3) of SGM3005XD/TR, its control signal input end is connected with master control unit 2, connect input end (being equivalent to the moved end of single-pole double-throw switch (SPDT)) to be connected with radio-frequency unit 1, two connect output terminal (being equivalent to the not moved end of single-pole double-throw switch (SPDT)) and are connected with the first SIM card 4, second SIM card 5 respectively, for receiving the control signal that master control unit 2 sends over, and according to this control signal control linkage input end and two break-makes be connected between output terminal.
First SIM card 4 and the second SIM card 5 (SIM1 and SIM2, identification module as gsm module logging in network) upper two identical signal wire tie points are connected output terminal with two of switching part 3 respectively and are connected, and in each SIM card remaining four signal wire tie point one_to_one corresponding connected after be connected to radio-frequency unit 1; In this example, the pin 5 of the first SIM card 4 and the second SIM card 5 is connected output terminal with two of switching part 3 respectively and is connected, after the pin 1 of the first SIM card 4, pin 3, pin 4, pin 6 are connected with the pin 1 of the second SIM card 5, pin 3, pin 4, pin 6 one_to_one corresponding respectively, then be connected to radio-frequency unit 1; The signal wire switching SIM card by switching part 3 in practical application can realize the mutual switching of SIM card, and the pin 5 namely by controlling which SIM card is connected the switching that can realize SIM card with radio-frequency unit 1.
Interface unit 6 (JP1), is connected with master control unit 2 with external unit respectively, realizes the communication of described gsm module and external unit on the one hand, on the other hand for described gsm module provides power supply.
The type of described first SIM card 4 and the second SIM card 5 can be usim card, micro SIM card, SIM chip.
Described interface unit 6 can be polytype external interface, can be row's pin, row's seat or golden finger wiring board.
Antennal interface on described radio-frequency unit 1 is SMA interface (for the assembly that fixes up an aerial wire), is connected with radio-frequency unit 1 by microstrip line.
Principle of the present utility model is: first radio-frequency unit 1 judges current network conditions, and judged result is sent to master control unit 2, whether master control unit 2 determines to transmit control signal to switching part 3 to control it and switch according to this judged result, realizes the selection to the first SIM card 4 and the second SIM card 5.
See in conjunction with actual service condition of the present utility model, after acquiescence selection first SIM card 4 is as identification module, once network condition is undesirable, master control unit 2 can to switching part 3 transmit control signal control its switch, select the second SIM card 5 as identification module.In like manner, select the second SIM card 5 as after identification module, once network condition is undesirable, master control unit 2 can transmit control signal to switching part 3 and control it and switch, then switches back the first SIM card 4.Handoff procedure only need control a signal wire, implement more simple and reliable, and antijamming capability is strong.
Claims (8)
1. one kind has the gsm module of double card list standby function, it is characterized in that: it comprises radio-frequency unit (1), master control unit (2), switching part (3), the first SIM card (4), the second SIM card (5) and the interface unit (6) of being with antennal interface, wherein
Radio-frequency unit (1), be connected with master control unit (2), judges whether current network signal is better than setting value, then judged result is sent to master control unit (2) for Received signal strength;
Master control unit (2), be connected with interface unit (6) with radio-frequency unit (1), switching part (3) respectively, the judged result that one side received RF parts (1) sends over, and to transmit control signal to switching part (3) according to this judged result and control its action, on the other hand carry out communication by interface unit (6) and external unit;
Switching part (3), it is a single pole double throw analog switch, its control signal input end is connected with master control unit (2), connect input end to be connected with radio-frequency unit (1), two connect output terminal and are connected with the first SIM card (4), the second SIM card (5) respectively, for receiving the control signal that master control unit (2) sends over, and according to this control signal control linkage input end and two break-makes be connected between output terminal;
Upper two the identical signal wire tie points of first SIM card (4) and the second SIM card (5) are connected output terminal with two of switching part (3) respectively and are connected, and in each SIM card remaining four signal wire tie point one_to_one corresponding connected after be connected to radio-frequency unit (1);
Interface unit (6), is connected with master control unit (2) with external unit respectively, realizes the communication of described gsm module and external unit on the one hand, on the other hand for described gsm module provides power supply.
2. the gsm module with double card list standby function according to claim 1, it is characterized in that: described radio-frequency unit (1) comprises rf signal reception assembly, emission of radio frequency signals assembly, and be connected for judging whether network signal is better than the radiofrequency signal processing components of setting value with rf signal reception assembly, emission of radio frequency signals assembly and master control unit (2) respectively.
3. the gsm module with double card list standby function according to claim 2, is characterized in that: the model of described radiofrequency signal processing components is XL600.
4. the gsm module with double card list standby function according to claim 1 or 2 or 3, is characterized in that: described master control unit (2) is that R5F212BC controller and peripheral circuit thereof form by model.
5. the gsm module with double card list standby function according to claim 1 or 2 or 3, is characterized in that: described switching part (3) employing model is the single pole double throw analog switch of SGM3005XD/TR.
6. the gsm module with double card list standby function according to claim 1 or 2 or 3, is characterized in that: described first SIM card (4) and the second SIM card (5) are usim card, micro SIM card, SIM chip.
7. the gsm module with double card list standby function according to claim 1 or 2 or 3, is characterized in that: described interface unit (6) is row's pin, row's seat or golden finger wiring board.
8. the gsm module with double card list standby function according to claim 1 or 2 or 3, is characterized in that: the antennal interface on described radio-frequency unit (1) is SMA interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420482760.6U CN204044568U (en) | 2014-08-26 | 2014-08-26 | There is the gsm module of double card list standby function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420482760.6U CN204044568U (en) | 2014-08-26 | 2014-08-26 | There is the gsm module of double card list standby function |
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| Publication Number | Publication Date |
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| CN204044568U true CN204044568U (en) | 2014-12-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420482760.6U Expired - Lifetime CN204044568U (en) | 2014-08-26 | 2014-08-26 | There is the gsm module of double card list standby function |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110300405A (en) * | 2019-07-17 | 2019-10-01 | 陕西瑞迅电子信息技术有限公司 | A kind of device and method for realizing SIM card switching |
| CN111756427A (en) * | 2020-05-06 | 2020-10-09 | 广州市中海达测绘仪器有限公司 | Multi-card single-standby GNSS receiver intelligent switching device, method, equipment and medium |
-
2014
- 2014-08-26 CN CN201420482760.6U patent/CN204044568U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110300405A (en) * | 2019-07-17 | 2019-10-01 | 陕西瑞迅电子信息技术有限公司 | A kind of device and method for realizing SIM card switching |
| CN111756427A (en) * | 2020-05-06 | 2020-10-09 | 广州市中海达测绘仪器有限公司 | Multi-card single-standby GNSS receiver intelligent switching device, method, equipment and medium |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20141224 |