CN215910918U - Campus guard card and campus guard card subassembly - Google Patents

Abstract

The embodiment of the application provides a campus guard card and campus guard card external member, and this campus guard card includes: the device comprises a power management circuit, a main control circuit and a Type-C interface circuit, wherein the main control circuit is respectively connected with a serial data transmission signal pin, an analog audio output signal pin and a microphone input signal pin of the Type-C interface circuit, and the power management circuit is connected with a power signal pin of the Type-C interface circuit; the master control circuit supports an audio output function, and the campus daemon card is used for connecting a terminal device, a power converter or an analog audio earphone with a Type-C interface through the Type-C interface. The scheme of this application carries out the interface self-defining through idle pin in to Type-C interface for under the prerequisite that does not increase digital commentaries on classics analog module, can realize multiple functions such as simulation audio output, charge and upgrading/debugging through same interface.

Description

Campus guard card and campus guard card subassembly

Technical Field

The application relates to the technical field of intelligent campus management, in particular to a campus daemon card and a campus daemon card suite.

Background

The existing campus cards for students have single functions, generally only support functions of consumption card swiping, attendance card punching and the like, and along with the rapid development of networks, some campus cards can also gradually support functions of audio playing, voice call and the like. However, for the campus card supporting audio output, currently, analog audio output to the earphone is mainly realized by adopting an earphone interface such as 3.5nm, and in addition, the existing charging interface generally adopts a USB protocol interface, specifically, a Type-A, Micro-B interface, etc., since the charging and the earphone are necessary functions, two holes with different types and sizes need to be formed on the campus card, which not only increases the manufacturing process and cost, but also is not favorable for waterproof and miniaturized design, etc.

SUMMERY OF THE UTILITY MODEL

In view of the above, to solve at least one of the above problems, embodiments of the present application provide a campus daemon card and a campus daemon card suite.

An embodiment of the present application provides a campus daemon card, including: the device comprises a power management circuit, a main control circuit and a Type-C interface circuit, wherein the main control circuit is respectively connected with a serial data transmission signal pin, an analog audio output signal pin and a microphone input signal pin of the Type-C interface circuit, and the power management circuit is connected with a power signal pin of the Type-C interface circuit;

the master control circuit supports an audio output function, and the campus daemon card is used for connecting a terminal device, a power converter or an analog audio earphone with a Type-C interface through the Type-C interface.

For example, in one embodiment, the analog audio output signal pins are the SSRX + pin and the SSRX-pin of the Type-C interface;

the microphone input signal pin is a first VBUS pin of the Type-C interface.

For example, in one embodiment, the serial data transfer signal pins are the D + pin and the D-pin of the Type-C interface;

the power signal pin is a second VBUS pin and a GND pin of the Type-C interface.

For example, in one embodiment, the campus daemon card is configured to contact, when the analog audio headset is connected, a contact of each of the SSRX + pin, the SSRX-pin, the first VBUS pin, and the GND pin of the Type-C interface circuit with a corresponding pin contact in a Type-C interface of the analog audio headset.

For example, in one embodiment, the campus daemon card is configured to contact a corresponding pin contact of a Type-C interface end of a Type-C to USB interface transmission line through respective contacts of the D + pin, the D-pin, the second VBUS pin, and a GND pin of the Type-C interface circuit when the terminal device or the power converter is connected through the Type-C to USB interface transmission line.

For example, in one embodiment, the campus daemon card is configured to make contact with a corresponding pin contact of a Type-C interface end of a Type-C to USB interface transmission line only through respective contacts of the second VBUS pin and a GND pin of the Type-C interface circuit when the power converter is connected through the Type-C to USB interface transmission line.

For example, in one embodiment, the main control circuit includes a main control chip, a cellular communication module and a bluetooth audio module, and both the cellular communication module and the bluetooth audio module are connected to the main control chip, wherein the bluetooth audio module is respectively connected to the serial data transmission signal pin, the analog audio output signal pin and the microphone input signal pin of the Type-C interface circuit;

the cellular communication module is used for realizing the voice communication and network access functions of the campus daemon card, and the Bluetooth audio module is used for playing online or offline audio.

For example, in one embodiment, the left channel and right channel audio output pins of the bluetooth audio module are connected to the SSRX + pin and the SSRX-pin of the Type-C interface, respectively;

an MIC input pin of the Bluetooth audio module is connected with a first VBUS pin of the Type-C interface;

and the serial data input pin and the serial data output pin of the Bluetooth audio module are respectively connected with the D + pin and the D-pin of the Type-C interface.

For example, in one embodiment, the main control circuit includes an NFC module and a GPS positioning module, and both the NFC module and the GPS positioning module are connected to the main control chip;

the NFC module is used for realizing near field communication between the campus daemon card and the campus terminal equipment, and the GPS positioning module is used for carrying out position positioning on the campus daemon card.

The embodiment of the application also provides a campus guard card suite, which comprises the campus guard card and the power converter and/or the analog audio earphone with the Type-C interface which are used cooperatively.

The embodiment of the application has the following beneficial effects:

the campus daemon card comprises a power management circuit, a main control circuit and a Type-C interface circuit, wherein the main control circuit is respectively connected with a serial data transmission signal pin, an analog audio output signal pin and a microphone input signal pin of the Type-C interface circuit, and the power management circuit is connected with a power signal pin of the Type-C interface circuit; the main control circuit supports an audio output function, and the campus daemon card is used for connecting terminal equipment, a power converter or an analog audio earphone with a Type-C interface through the Type-C interface. The scheme of this application carries out the interface self-defining through idle pin to in the Type-C interface, need not increase like under the condition of hardware such as DAC chip, can realize utilizing same Type-C interface to realize the compatibility of multiple functions such as analog audio output, data transmission and charging, practices thrift the cost, can also guarantee the high-fidelity of audio etc..

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.

Fig. 1 shows a first structural diagram of a campus daemon card according to an embodiment of the present application;

FIG. 2 is a schematic diagram illustrating pin customization for a Type-C interface according to an embodiment of the present application;

FIG. 3 is a schematic diagram illustrating an architecture of an analog audio headset with a Type-C interface according to an embodiment of the present application;

fig. 4 shows a second structural diagram of the campus daemon card according to the embodiment of the present application.

Description of the main element symbols:

100-campus guard card; 101-a master control circuit; 102-Type-C interface circuit; 103-power management circuitry; 110-a master control chip; 120-a cellular communication module; 130-a bluetooth audio module; 140-an NFC module; 150-GPS location module.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments.

The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present application without making any creative effort, shall fall within the protection scope of the present application.

Hereinafter, the terms "including", "having", and their derivatives, which may be used in various embodiments of the present application, are intended to indicate only specific features, numbers, steps, operations, elements, components, or combinations of the foregoing, and should not be construed as first excluding the existence of, or adding to, one or more other features, numbers, steps, operations, elements, components, or combinations of the foregoing.

Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the various embodiments of the present application belong. The terms (such as those defined in commonly used dictionaries) should be interpreted as having a meaning that is consistent with their contextual meaning in the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein in various embodiments.

Referring to fig. 1, the present embodiment provides a campus card 100. the campus card 100 has not only basic functions of a school student card, such as checking on attendance, swiping a card for canteen consumption, etc., but also an audio output function, for example, it can access audio programs, such as himalaya, etc., on line to realize interesting functions of audio on demand, on-line listening and reading, etc.

It is worth noting that the campus daemon card 100 in the embodiment of the present application realizes the access of the analog audio headset by using the USB Type-C interface supporting the bidirectional connection, and in addition, the USB Type-C interface can also be used for charging, system upgrading, debugging and the like of the campus daemon card 100.

Exemplarily, as shown in fig. 1, the campus daemon card 100 includes: power management circuit 103, master control circuit 101 and Type-C interface circuit 102, the serial data transmission signal pin, analog audio output signal pin and the microphone input signal pin of Type-C interface circuit 102 are connected respectively to master control circuit 101, and power management circuit 103 connects the power signal pin of Type-C interface circuit 102. The power management circuit 103 is mainly used to provide required operating voltages for the modules in the main control circuit 101. The main control circuit 101 is used as a main control of the campus daemon card 100, and is mainly used for implementing corresponding functions of the campus daemon card 100, such as attendance checking, consumption payment, positioning, audio output and the like. The Type-C interface circuit 102 is mainly used for connecting with an external device through a Type-C interface, such as connecting with a power converter for charging, connecting with an analog audio earphone with a Type-C interface for analog audio output, and connecting with a terminal device such as a computer and a mobile phone for system data upgrading or debugging.

FIG. 2 shows all pin definitions for the Type-C interface. In one embodiment, as shown in fig. 2, the SSRX + pin and the SSRX-pin of the Type-C interface can be defined as analog audio output signal pins for analog audio output of left and right channels of the campus daemon card 100, instead of the 3.5nm headset interface. And defining a VBUS pin of the Type-C interface as a Microphone (MIC) input signal pin for obtaining an external analog audio signal and the like.

In addition, in order to be compatible with the data transmission and charging functions, a D + pin and a D-pin of the Type-C interface are also defined as serial data transmission signal pins, and can be used for realizing data transmission and the like between the campus daemon card 100 and a terminal device such as a computer. And defining a second VBUS pin and a GND pin of the Type-C interface as power supply signal pins. For example, when power is required to be supplied to an external device such as a mouse, a keyboard, etc., power can be supplied through the two pins.

It is noted that to achieve direct output of analog audio, the present embodiment will customize the analog audio headset with Type-C interface. It will be appreciated that the 3.5nm headset interface is replaced with a pin-customized Type-C interface, and in particular, as shown in fig. 3, the Type-C interface in the analog audio headset will only use the SSRX + pin, the SSRX-pin, a VBUS pin, and the GND pin.

In a first usage scenario, when accessing the customized analog audio headset with a Type-C interface, the campus daemon card 100 will only make contact with the pin contacts in the Type-C interface of the analog audio headset as shown in fig. 3 through the respective contacts of the SSRX + pin, the SSRX-pin, the first VBUS pin, and the GND pin in the Type-C interface circuit 102.

In the second usage scenario, when system upgrade or debugging needs to be performed on the campus daemon card 100, a Type-C to USB interface transmission line may be used to connect the campus daemon card 100 with a terminal device, and at this time, the campus daemon card 100 contacts a corresponding pin contact of a Type-C interface end of the Type-C to USB interface transmission line through respective contacts of a D + pin, a D-pin, a second VBUS pin, and a GND pin of the Type-C interface circuit 102. It can be understood that the Type-C to USB interface transmission line at this time may be a general signal transmission line.

In a third usage scenario, when the campus daemon card 100 needs to be charged, a Type-C to USB interface transmission line may be used to connect the campus daemon card 100 and the power converter, and at this time, the campus daemon card 100 will only contact a corresponding pin contact of a Type-C interface end of the Type-C to USB interface transmission line through respective contacts of a second VBUS pin and a GND pin of the Type-C interface circuit 102. It can be understood that the Type-C terminal in the Type-C to USB interface transmission line at this time may only use the VBUS pin and the GND pin, or may also use a general signal transmission line, and at this time, the CC pin needs to be grounded.

Generally, the Type-C interface uses more main pins including VBUS, D +, D-, and GND pins, and these pins can implement two operating modes of data transmission and charging, and in addition, can also perform automatic switching of the operating mode through the CC pin. However, in the present application, in addition to using the above-mentioned several main pins, the function of the uncommon pin such as the SSRX + pin and the SSRX-pin in the Type-C interface is customized, so that the Type-C interface circuit 102 of the campus daemon card 100 can be compatible with the above-mentioned multiple functions at the same time.

In this embodiment, the function of the campus daemon card 100 needs to be supported by a corresponding hardware circuit. In one embodiment, as shown in fig. 2, the main control circuit 101 includes a main control chip 110, a cellular communication module 120, a bluetooth audio module 130, and the like, and the cellular communication module 120 and the bluetooth audio module 130 are both connected to the main control chip 110. As a part of the main control circuit 101, the bluetooth audio module 130 is used to connect with the Type-C interface circuit 102, and specifically, it is connected with the serial data transmission signal pin, the analog audio output signal pin and the microphone input signal pin of the Type-C interface circuit 102, respectively.

The cellular communication module 120 is mainly used for implementing the voice communication and network access functions of the campus daemon card 100, for example, the cellular communication module 120 mainly includes a SIM card and a 3G/4G/5G communication module, where the 3G/4G/5G communication module is mainly responsible for communication with a carrier base station providing the SIM card, so as to implement voice call, short message communication, even video call, and the like of the campus daemon card 100. The bluetooth audio module 130 may be configured to implement online audio output and the like in a case where the campus daemon card 100 supports a network. In addition, the bluetooth audio module 130 can also be used to connect with a bluetooth headset to play audio and the like.

For example, taking a bluetooth audio module 130 of the BC352xx series as an example, the bluetooth audio module 130 supports audio output and data transmission, and thus, a left channel audio output (SPK _ L) pin and a right channel audio output (SPK _ R) pin thereof can be correspondingly connected to an SSRX + pin and an SSRX-pin in the Type-C interface, respectively; connecting an MIC input pin of the Bluetooth audio module 130 with a first VBUS pin in a Type-C interface; and, connecting serial data input and output (UART _ RX and UART _ TX) pins of the Bluetooth audio module 130 to a D + pin and a D-pin of the Type-C interface, respectively. It is understood that the pin connection of the bluetooth audio module 130 is only an example, and may be specifically configured according to actual requirements, and is not limited herein.

As an alternative, as shown in fig. 4, the campus daemon card 100 supports an NFC function, and exemplarily, the host circuit 101 further includes an NFC module 140, where the NFC module 140 is connected to the host chip 110. The NFC module 140 is mainly used for implementing near field communication between the campus daemon card 100 and the campus terminal device, for example, the NFC module may be used for paying a consumption amount and the like through a POS machine near a campus store; or, the card reader can be used for checking attendance and punching cards through an attendance machine close to a school door.

Further, the campus daemon card 100 also supports a positioning function. Exemplarily, the main control circuit 101 further includes a GPS positioning module 150, wherein the GPS positioning module 150 is connected to the main control chip 110. The GPS positioning module 150 can be used to position the campus daemon card 100 so as to obtain the location of the student. Furthermore, the position information of the students can be uploaded to the server through the communication module, and then pushed to teachers, parents and the like of the students, so that the students can know the dynamic state of the students.

In the application, the function of idle pins is customized through the Type-C interface circuit 102 of the campus daemon card 100, that is, the campus daemon card can be compatible with multiple functions listed above through the improvement of the Type-C interface. Compared with a 3.5nm earphone interface, the campus daemon card 100 with the improved Type-C interface has the following advantages: (1) the cost is low because hardware such as DAC chips and the like is not required to be added; (2) because the adopted method is to simulate the output of audio tone quality signals, the sound effect is high fidelity; (3) the special holes for the earphones do not need to be formed, more components do not need to be added, the waterproof design is convenient, and the earphones are not easy to damage.

The embodiment of the present application further provides a campus daemon card kit, exemplarily, the campus daemon card kit includes the above campus daemon card 100, and the above power converter and/or the above analog audio earphone with a Type-C interface used cooperatively. It is to be understood that the alternatives of the campus daemon card 100 described above are equally applicable to this embodiment and therefore will not be described again here.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application.

Claims (10)

1. A campus daemon card, comprising: the device comprises a power management circuit, a main control circuit and a Type-C interface circuit, wherein the main control circuit is respectively connected with a serial data transmission signal pin, an analog audio output signal pin and a microphone input signal pin of the Type-C interface circuit, and the power management circuit is connected with a power signal pin of the Type-C interface circuit;

the master control circuit supports an audio output function, and the campus daemon card is used for connecting a terminal device, a power converter or an analog audio earphone with a Type-C interface through the Type-C interface.

2. The campus daemon card of claim 1, wherein the analog audio output signal pins are the SSRX + pin and the SSRX-pin of the Type-C interface;

the microphone input signal pin is a first VBUS pin of the Type-C interface.

3. The campus daemon card of claim 2, wherein the serial data transmission signal pins are a D + pin and a D-pin of the Type-C interface;

the power signal pin is a second VBUS pin and a GND pin of the Type-C interface.

4. The campus daemon card of claim 2, wherein the campus daemon card is configured to contact a corresponding pin contact in a Type-C interface of the analog audio headset through respective contacts of the SSRX + pin, the SSRX-pin, the first VBUS pin, and a GND pin of the Type-C interface circuit when the analog audio headset is accessed.

5. The campus daemon card of claim 3, wherein the campus daemon card is configured to contact a corresponding pin contact of a Type-C interface end of a Type-C to USB interface transmission line through respective contacts of the D + pin, the D-pin, the second VBUS pin and a GND pin of the Type-C interface circuit when the terminal device or the power converter is connected through the Type-C to USB interface transmission line.

6. The campus daemon card of claim 3, wherein the campus daemon card is configured to make contact with a corresponding pin contact of a Type-C interface end of a Type-C to USB interface transmission line only through respective contacts of the second VBUS pin and a GND pin of the Type-C interface circuit when the power converter is connected through the Type-C to USB interface transmission line.

7. The campus daemon card of claim 3, wherein the main control circuit comprises a main control chip, a cellular communication module and a Bluetooth audio module, the cellular communication module and the Bluetooth audio module are both connected with the main control chip, wherein the Bluetooth audio module is respectively connected with the serial data transmission signal pin, the analog audio output signal pin and the microphone input signal pin of the Type-C interface circuit;

the cellular communication module is used for realizing the voice communication and network access functions of the campus daemon card, and the Bluetooth audio module is used for playing online or offline audio.

8. The campus daemon card of claim 7, wherein the left channel and right channel audio output pins of the Bluetooth audio module are connected to the SSRX + pin and the SSRX-pin of the Type-C interface, respectively;

an MIC input pin of the Bluetooth audio module is connected with a first VBUS pin of the Type-C interface;

and the serial data input pin and the serial data output pin of the Bluetooth audio module are respectively connected with the D + pin and the D-pin of the Type-C interface.

9. The campus daemon card of claim 7, wherein the master control circuit comprises an NFC module and a GPS positioning module, and both the NFC module and the GPS positioning module are connected with the master control chip;

the NFC module is used for realizing near field communication between the campus daemon card and the campus terminal equipment, and the GPS positioning module is used for carrying out position positioning on the campus daemon card.

10. A campus daemon card kit comprising a campus daemon card according to any one of claims 1 to 9, and the power converter and/or the analog audio earphone with Type-C interface used cooperatively.

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