CN215647396U - Circuit for automatically switching SIM card according to operator network - Google Patents
Circuit for automatically switching SIM card according to operator network Download PDFInfo
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- CN215647396U CN215647396U CN202122008377.XU CN202122008377U CN215647396U CN 215647396 U CN215647396 U CN 215647396U CN 202122008377 U CN202122008377 U CN 202122008377U CN 215647396 U CN215647396 U CN 215647396U
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Abstract
The utility model discloses a circuit for automatically switching SIM cards according to operator networks, which comprises a signal acquisition circuit for acquiring signals of each operator in an installation region, a communication module for connecting the operator networks and an analog switch circuit for switching mobile, communication and telecommunication operator networks, wherein the output end of the signal acquisition circuit is connected with the input end of the communication module, the output end of the communication module is connected with the input end of the analog switch circuit, and the output end of the analog switch circuit is respectively connected with a mobile phone card, a communication mobile phone card and a telecommunication mobile phone card. According to the utility model, after the communication module polls and searches the operator network, the operator network existing on site is selected for communication through the networking response condition, and the connected network is selected in the network coverage area supported by the single network operator, so that the stability of equipment network connection is ensured.
Description
Technical Field
The utility model relates to the technical field of Internet of things, in particular to a circuit for automatically switching an SIM card according to an operator network.
Background
The existing internet of things equipment is usually only provided with an SIM card matched with an internet of things module, and in the field use process, the common program setting is directly connected with an operator network of the SIM card, and then the internet of things equipment can be used. However, in reality, the problem that a remote area only has a single operator network exists, and in addition, due to the special use scene, the used E-SIM card (directly welded on a circuit board) cannot be conveniently replaced. It cannot be solved in time when the SIM card and the operator are mismatched. In addition, the practical technical difficulty is that the communication module generally only supports one SIM card communication in order to reduce the cost, so there is no way to solve the problem by using the communication module without increasing the cost.
SUMMERY OF THE UTILITY MODEL
The technical problem to be solved by the utility model is to provide a circuit for automatically switching an SIM card according to an operator network, which can select operators existing on site to carry out networking and ensure the stability of network connection.
In order to solve the technical problems, the technical scheme adopted by the utility model is as follows.
The circuit for automatically switching the SIM card according to the operator network comprises a signal acquisition circuit for acquiring signals of each operator in an installation region, a communication module for connecting the operator network and an analog switch circuit for switching the networks of the mobile, the Unicom and the telecom operators, wherein the output end of the signal acquisition circuit is connected with the input end of the communication module, the output end of the communication module is connected with the input end of the analog switch circuit, and the output end of the analog switch circuit is respectively connected with the mobile phone card, the Unicom mobile phone card and the telecom mobile phone card.
The above circuit for automatically switching the SIM card according to the operator network, the communication module is a full network communication module.
The circuit for automatically switching the SIM card according to the operator network is characterized in that the communication module is a 4G communication module.
The circuit for automatically switching the SIM card according to the operator network adopts two CD4052BM chips as the analog switch circuit.
Due to the adoption of the technical scheme, the technical progress of the utility model is as follows.
According to the utility model, after the communication module polls and searches the operator network, the operator network existing on site is selected for communication through the networking response condition, and the connected network is selected in the network coverage area supported by the single network operator, so that the stability of equipment network connection is ensured.
Drawings
FIG. 1 is a functional block diagram of the present invention;
FIG. 2 is a schematic diagram of the present invention;
fig. 3 is a circuit diagram of a signal acquisition circuit according to the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
The circuit for automatically switching the SIM card according to the operator network has a structural block diagram shown in figure 1 and comprises a signal acquisition circuit, a communication module and an analog switch circuit, wherein the output end of the signal acquisition circuit is connected with the input end of the communication module, the output end of the communication module is connected with the input end of the analog switch circuit, and the output end of the analog switch circuit is respectively connected with a mobile phone card, a communication mobile phone card and a telecommunication mobile phone card.
The communication module is a communication module of the whole network communication, is used for connecting an operator network and can carry out mobile, communication and networking of a telecommunication network.
The communication module adopts the 4G communication module, has guaranteed signal transmission's reliability and network connection's stability.
The analog switch circuit is used for switching the connected mobile phone card, the communication mobile phone card and the telecommunication mobile phone card, in the actual networking process, the analog switch circuits of the three mobile phone cards are respectively opened through the analog switch circuit, the communication modules respectively perform networking communication, and finally one of the three mobile phone cards is selected for the networking communication. The schematic diagram of the utility model is shown in fig. 2, the 4G communication module adopts ML7820+ chip to realize the connection of mobile, communication and telecommunication network signals, and adopts two CD4052BM chips to realize the analog switch circuit, wherein one chip sends clock signals to the mobile phone card, the communication mobile phone card and the telecommunication mobile phone card, and the other chip transmits data with the mobile phone card, the communication mobile phone card and the telecommunication mobile phone card.
The signal acquisition circuit is used for installing signals of mobile, communication and telecommunication operators in regions, the communication module is selectively connected with a mobile network, a communication network and a telecommunication network according to a network of a field operator acquired by the signal acquisition circuit, a circuit diagram of the signal acquisition circuit is shown in figure 3, and an LM3S2948PACK chip is used for acquiring signals of each operator.
When the communication module works, the communication module is divided into two conditions, one is that when the installation region only has one operator network, the mobile phone cards of different operators are switched and conducted through the analog switch circuit respectively, the operator network capable of being connected for communication is finally selected, and the mobile phone cards of the rest operators are not used any more.
In another case, when multiple operator networks exist in an installation region, after the analog switch circuit is turned on to perform respective networking tests, the communication module selects a set operator networking priority to perform networking, and can also autonomously select one operator to perform networking according to signal intensity.
Claims (4)
1. The circuit for automatically switching the SIM card according to the operator network is characterized in that: the system comprises a signal acquisition circuit for acquiring signals of each operator in an installation region, a communication module for connecting operator networks and an analog switch circuit for switching the networks of the three operators, namely mobile, communication and telecommunication, wherein the output end of the signal acquisition circuit is connected with the input end of the communication module, the output end of the communication module is connected with the input end of the analog switch circuit, and the output end of the analog switch circuit is respectively connected with a mobile phone card, a communication mobile phone card and a telecommunication mobile phone card.
2. The circuit for automatically switching a SIM card according to a carrier network of claim 1, wherein: the communication module is a full-network communication module.
3. The circuit for automatically switching a SIM card according to a carrier network of claim 1, wherein: the communication module is a 4G communication module.
4. The circuit for automatically switching a SIM card according to a carrier network of claim 1, wherein: the analog switching circuit employs two CD4052BM chips.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122008377.XU CN215647396U (en) | 2021-08-25 | 2021-08-25 | Circuit for automatically switching SIM card according to operator network |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122008377.XU CN215647396U (en) | 2021-08-25 | 2021-08-25 | Circuit for automatically switching SIM card according to operator network |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215647396U true CN215647396U (en) | 2022-01-25 |
Family
ID=79901699
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122008377.XU Active CN215647396U (en) | 2021-08-25 | 2021-08-25 | Circuit for automatically switching SIM card according to operator network |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215647396U (en) |
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2021
- 2021-08-25 CN CN202122008377.XU patent/CN215647396U/en active Active
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