Personnel card circuit based on NFC and BLE technologies

Abstract

The utility model discloses a personnel card circuit based on NFC (Near Field Communication) and BLE (Bluetooth Low Energy) technologies. The personnel card circuit comprises a 2.4 G low-power-consumption Bluetooth chip, a singlechip circuit, an NFC circuit, a power supply circuit, an LED (Light Emitting Diode) lamp circuit and a 2.4 G Bluetooth antenna circuit, the utility model provides a personnel card circuit based on NFC (near field communication) and BLE (Bluetooth Low Energy) technologies, which can quickly identify and register personnel information by utilizing the NFC technology, can realize access control management and meets the conventional personnel card function; relevant areas are subjected to fence demarcation through base station positioning, positions and motion states of personnel in the demarcated areas are supervised in real time through the BLE technology, the accuracy and the automation degree of the whole management process are greatly improved, product startup and shutdown can be achieved through NFC induction, product energy consumption can be effectively controlled, and product quality is improved. The service life of the product is ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of card circuits, and in particular relates to a personnel card circuit based on NFC and BLE technologies. Background Art

[0002] Currently, the industry uses RFID technology for personnel management and information tracking, relying on readers and writers at site identification locations to identify or report information. This is inefficient and cannot effectively track and manage personnel location information and mobility during the wearing process. Utility Model Content

[0003] In view of this, the main purpose of the utility model is to provide a personnel card circuit based on NFC and BLE technology.

[0004] In order to achieve the above object, the technical solution of the utility model is implemented as follows:

[0005] The embodiment of the utility model provides a personnel card circuit based on NFC and BLE technology, including a 2.4G low-power Bluetooth chip, a single-chip circuit, an NFC circuit, a power supply circuit, an LED light circuit, and a 2.4G Bluetooth antenna circuit. The power supply circuit is used to power the 2.4G low-power Bluetooth chip and the single-chip circuit. The NFC circuit is communicatively connected to the single-chip circuit. The single-chip circuit and the NFC circuit are both connected to the power supply circuit to control the on and off of the power supply circuit. The 2.4G Bluetooth antenna circuit is connected to the 2.4G low-power Bluetooth chip to be connected to a base station. The signal output end of the NFC circuit is connected to the signal input end of the single-chip circuit to feed back the NFC sensing state to the single-chip circuit, and the single-chip circuit controls the power supply circuit to be turned off.

[0006] In the above scheme, the power supply circuit includes a battery, a load switch, a fourth capacitor, a seventh capacitor, a fourth resistor, and a first diode. The positive electrode of the battery is respectively connected to the VIN terminal of the load switch and the first end of the fourth capacitor, the ON terminal of the load switch is connected to the first end of the fourth resistor R4, the second end of the fourth resistor is connected to the cathode of the first diode, the Vout terminal of the load switch is connected to the first end of the seventh capacitor, and the negative electrode of the battery, the second end of the seventh capacitor, and the second end of the fourth capacitor are all grounded.

[0007] In the above solution, the VCC terminal of the 2.4G low-power Bluetooth chip is connected to the first terminal of the seventh capacitor.

[0008] In the above scheme, the 2.4G Bluetooth antenna circuit includes a first inductor, a second capacitor, a third capacitor, and an antenna. The first end of the first inductor is respectively connected to the first end of the second capacitor and the RF_TX end of the 2.4G low-power Bluetooth chip, the second end of the first inductor is respectively connected to the first end of the third capacitor and the antenna, and the second end of the second capacitor and the second end of the third capacitor are both grounded.

[0009] In the above scheme, the single-chip microcomputer circuit includes a single-chip microcomputer, a seventh resistor, a tenth capacitor, and an eleventh capacitor. The P3.3 / ADC11 / INT1 / MISO_4 / I2CSDA_4 terminal of the single-chip microcomputer is connected to the positive electrode of the first diode, the Vcc / AVcc / ADC_VRef+ terminal of the single-chip microcomputer is respectively connected to the first end of the tenth capacitor and the first end of the eleventh capacitor, the second end of the tenth capacitor and the second end of the eleventh capacitor are both grounded, the CCP0 / TxD2 / ADC1 / P1.1 terminal of the single-chip microcomputer is connected to the GPIO0 terminal of the 2.4G low-power Bluetooth chip, and the CCP1 / RxD2 / ADC0 / P1.0 terminal of the single-chip microcomputer is connected to the GPIO1 terminal of the 2.4G low-power Bluetooth chip.

[0010] In the above scheme, the NFC circuit includes an NFC chip, a fifth resistor, a sixth resistor, a tenth resistor, an eighth capacitor, a ninth capacitor, a twelfth capacitor, a thirteenth capacitor, and an NFC coil. The first end of the tenth resistor is connected to the first end of the seventh capacitor, and the second end of the tenth resistor is respectively connected to the first end of the tenth capacitor, the first end of the fifth resistor, the first end of the sixth resistor, the first end of the eighth capacitor, and the VCC end of the NFC chip. The SDA end of the NFC chip is connected to the second end of the fifth resistor, the SCL end of the NFC chip is connected to the second end of the sixth resistor, and the VOUT end of the NFC chip is connected to the ninth capacitor and then grounded. The IN1 end of the NFC chip is respectively connected to the first end of the twelfth capacitor, the first end of the thirteenth capacitor and the first end of the NFC coil, the IN2 end of the NFC chip is respectively connected to the second end of the twelfth capacitor, the second end of the thirteenth capacitor and the second end of the NFC coil, the CSN end of the NFC chip is connected to the XTALO / MCLKO_2 / RxD_3 / ADC6 / P1.6 end of the microcontroller, the SCL end of the NFC chip is connected to the I2CSCL / SCLK / ADC5 / P1.5 end of the microcontroller, and the IRQ end of the NFC chip is connected to the P3.2 / ADC10 / INT0 / SCLK_4 / I2CSCL_4 end of the microcontroller.

[0011] In the above scheme, the LED lamp circuit includes an eighth resistor and a light emitting diode. The first end of the eighth resistor is connected to the P5.5 terminal of the single chip microcomputer, and the second end of the eighth resistor is connected in series with the light emitting diode and then grounded.

[0012] Compared with the prior art, the utility model provides a personnel card circuit based on NFC and BLE technology, which can quickly identify and register personnel information by using NFC technology, and realize access control management, satisfying the conventional personnel card function; fences are demarcated for relevant areas through base station positioning, and the position and movement status of personnel in the demarcated area are monitored in real time by using BLE technology, which greatly improves the accuracy and automation of the entire management process, and can realize product power on and off through NFC sensing, which can effectively control product energy consumption and ensure the service life of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The drawings described herein are used to disclose a further understanding of the present invention and constitute a part of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0014] Figure 1 This is a schematic diagram of the structure of the personnel card circuit based on NFC and BLE technology according to an embodiment of the utility model;

[0015] Figure 2 This is a schematic diagram of the structure of the 2.4G low-power Bluetooth chip described in the embodiment of the utility model;

[0016] Figure 3 It is a structural schematic diagram of the power supply circuit described in the embodiment of the utility model;

[0017] Figure 4 This is a schematic diagram of the structure of the single chip microcomputer circuit and the LED lamp circuit according to the embodiment of the utility model;

[0018] Figure 5 It is a structural schematic diagram of the HFC circuit described in an embodiment of the utility model. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0020] The same or similar numbers in the drawings of this embodiment correspond to the same or similar parts; in the description of the present utility model, it should be understood that the terms "upper", "lower", "left", "right", "inner", "outer", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as a limitation on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0021] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, article or device. In the absence of more restrictions, an element defined by the sentence "includes a ..." does not exclude the existence of other identical elements in the process, article or device including the element.

[0022] The present invention provides a personnel card circuit based on NFC and BLE technology, such as Figure 1-5 As shown, it includes a 2.4G low-power Bluetooth chip U1, a single-chip microcomputer circuit, an NFC circuit, a power supply circuit, an LED light circuit, and a 2.4G Bluetooth antenna circuit. The power supply circuit is used to power the 2.4G low-power Bluetooth chip U1 and the single-chip microcomputer circuit. The NFC circuit is communicatively connected to the single-chip microcomputer circuit. The single-chip microcomputer circuit and the NFC circuit are both connected to the power supply circuit to control the on and off of the power supply circuit. The 2.4G Bluetooth antenna circuit is connected to the 2.4G low-power Bluetooth chip U1 to connect to a positioning base station. The signal output end of the NFC circuit is connected to the signal input end of the single-chip microcomputer circuit to feed back the NFC sensing state to the single-chip microcomputer circuit, and the single-chip microcomputer circuit controls the power supply circuit to shut down.

[0023] like Figure 1-5As shown, the power supply circuit includes a battery BAT1, a load switch U2, a fourth capacitor C4, a seventh capacitor C7, a fourth resistor R4, and a first diode MD1. The positive electrode of the battery BAT1 is respectively connected to the VIN terminal of the load switch U2 and the first end of the fourth capacitor C4, the ON terminal of the load switch U2 is connected to the first end of the fourth resistor R4, the second end of the fourth resistor R4 is connected to the negative electrode of the first diode MD1, the Vout terminal of the load switch U2 is connected to the first end of the seventh capacitor C7, and the negative electrode of the battery BAT1, the second end of the seventh capacitor C7, and the second end of the fourth capacitor C4 are all grounded.

[0024] like Figure 1-5 As shown, the VCC terminal of the 2.4G low-power Bluetooth chip U1 is connected to the first terminal of the seventh capacitor C7.

[0025] In the above solution, a 2.4G low-power Bluetooth chip is used to broadcast and report location information and motion status in real time.

[0026] like Figure 1-5 As shown, the 2.4G Bluetooth antenna circuit includes a first inductor L1, a second capacitor C2, a third capacitor C3, and an antenna ANT1. The first end of the first inductor L1 is respectively connected to the first end of the second capacitor C2 and the RF_TX end of the 2.4G low-power Bluetooth chip U1, the second end of the first inductor L1 is respectively connected to the first end of the third capacitor C3 and the antenna ANT1, and the second end of the second capacitor C2 and the second end of the third capacitor C3 are both grounded.

[0027] like Figure 1-5 As shown, the single-chip microcomputer circuit includes a single-chip microcomputer U4, a seventh resistor R7, a tenth capacitor C10, and an eleventh capacitor C11. The P3.3 / ADC11 / INT1 / MISO_4 / I2CSDA_4 terminal of the single-chip microcomputer U4 is connected to the positive electrode of the first diode MD1, the Vcc / AVcc / ADC_VRef+ terminal of the single-chip microcomputer U4 is respectively connected to the first end of the tenth capacitor C10 and the first end of the eleventh capacitor C11, the second end of the tenth capacitor C10 and the second end of the eleventh capacitor C11 are both grounded, the CCP0 / TxD2 / ADC1 / P1.1 terminal of the single-chip microcomputer U4 is connected to the GPIO0 terminal of the 2.4G low-power Bluetooth chip U1, and the CCP1 / RxD2 / ADC0 / P1.0 terminal of the single-chip microcomputer U4 is connected to the GPIO1 terminal of the 2.4G low-power Bluetooth chip U1.

[0028] In the above scheme, the single-chip microcomputer circuit controls the LED to stay on for 3 seconds after power-on, indicating that the product is powered on, and controls the power circuit to remain on; in the powered-on state, after receiving the NFC sensing status feedback, the LED light is controlled to flash three times, and then the power circuit is controlled to shut down to shut down the product.

[0029] like Figure 1-5 As shown, the NFC circuit includes an NFC chip U3, a fifth resistor R5, a sixth resistor R6, a tenth resistor R10, an eighth capacitor C8, a ninth capacitor C9, a twelfth capacitor C12, a thirteenth capacitor C13, and an NFC coil A1. The first end of the tenth resistor R10 is connected to the first end of the seventh capacitor C7, and the second end of the tenth resistor R10 is respectively connected to the first end of the tenth capacitor C10, the first end of the fifth resistor R5, the first end of the sixth resistor R6, the first end of the eighth capacitor C8, and the VCC end of the NFC chip U3. The SDA end of the NFC chip U3 is connected to the second end of the fifth resistor R5, the SCL end of the NFC chip U3 is connected to the second end of the sixth resistor R6, and the VOUT end of the NFC chip U3 is connected to the ninth capacitor C9. After connection, it is grounded, the IN1 end of the NFC chip U3 is respectively connected to the first end of the twelfth capacitor C12, the first end of the thirteenth capacitor C13 and the first end of the NFC coil A1, the IN2 end of the NFC chip U3 is respectively connected to the second end of the twelfth capacitor C12, the second end of the thirteenth capacitor C13 and the second end of the NFC coil A1, the CSN end of the NFC chip U3 is connected to the XTALO / MCLKO_2 / RxD_3 / ADC6 / P1.6 end of the microcontroller U4, the SCL end of the NFC chip U3 is connected to the I2CSCL / SCLK / ADC5 / P1.5 end of the microcontroller U4, and the IRQ end of the NFC chip U3 is connected to the P3.2 / ADC10 / INT0 / SCLK_4 / I2CSCL_4 end of the microcontroller U4.

[0030] In the above scheme, the NFC circuit can write the personnel information into the NFC chip U3 in advance, realize on-site clocking in through the card reader induction, and utilize the field energy collection and external power supply function of the NFC chip U3 to control the power circuit to be turned on in the off state, so as to start the product, and the single-chip circuit controls the power circuit to remain in the on state; in the on state, the NFC sensing state is fed back to the single-chip microcomputer circuit, and then the single-chip microcomputer circuit controls the power circuit to be turned off to shut down the product.

[0031] like Figure 1-5 As shown, the LED lamp circuit includes an eighth resistor R8 and a light emitting diode D1. The first end of the eighth resistor R8 is connected to the P5.5 end of the single chip computer U4. The second end of the eighth resistor R8 is connected in series with the light emitting diode D1 and then grounded.

[0032] In the above solution, the LED light circuit indicates the power on / off status of the product. It lights up for 3 seconds to enter the power on state; it flashes 3 times to enter the power off state.

[0033] In summary, in smart parks and smart campus applications, personnel information can be written into the NFC chip first; when relevant personnel go to work or school, they can use NFC technology to clock in and access control management, and turn on the card at the same time; BLE starts the wearer's location information at work, which is convenient for real-time management of personnel on-the-job information; when leaving get off work or school, they can use NFC technology to clock in and access control management, and turn off the card at the same time. Save energy consumption and ensure product life.

[0034] The above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention.

Claims

1. A personnel card circuit based on NFC and BLE technology, characterized in that: It includes a 2.4G low-power Bluetooth chip, a single-chip microcomputer circuit, an NFC circuit, a power supply circuit, an LED light circuit, and a 2.4G Bluetooth antenna circuit. The power supply circuit is used to power the 2.4G low-power Bluetooth chip and the single-chip microcomputer circuit. The NFC circuit is communicatively connected to the single-chip microcomputer circuit. The single-chip microcomputer circuit and the NFC circuit are both connected to the power supply circuit to control the on and off of the power supply circuit. The 2.4G Bluetooth antenna circuit is connected to the 2.4G low-power Bluetooth chip to be connected to a base station. The signal output end of the NFC circuit is connected to the signal input end of the single-chip microcomputer circuit to feed back the NFC sensing state to the single-chip microcomputer circuit, and the single-chip microcomputer circuit controls the power supply circuit to be turned off.

2. The personnel card circuit based on NFC and BLE technology according to claim 1 is characterized in that: The power supply circuit includes a battery, a load switch, a fourth capacitor, a seventh capacitor, a fourth resistor, and a first diode. The positive electrode of the battery is respectively connected to the VIN terminal of the load switch and the first end of the fourth capacitor, the ON terminal of the load switch is connected to the first end of the fourth resistor R4, the second end of the fourth resistor is connected to the cathode of the first diode, the Vout terminal of the load switch is connected to the first end of the seventh capacitor, and the negative electrode of the battery, the second end of the seventh capacitor, and the second end of the fourth capacitor are all grounded.

3. The personnel card circuit based on NFC and BLE technology according to claim 2 is characterized in that: The VCC terminal of the 2.4G low-power Bluetooth chip is connected to the first terminal of the seventh capacitor.

4. The personnel card circuit based on NFC and BLE technology according to claim 3 is characterized in that: The 2.4G Bluetooth antenna circuit includes a first inductor, a second capacitor, a third capacitor, and an antenna. The first end of the first inductor is respectively connected to the first end of the second capacitor and the RF_TX end of the 2.4G low-power Bluetooth chip, the second end of the first inductor is respectively connected to the first end of the third capacitor and the antenna, and the second end of the second capacitor and the second end of the third capacitor are both grounded.

5. The personnel card circuit based on NFC and BLE technology according to claim 4 is characterized in that: The single-chip microcomputer circuit includes a single-chip microcomputer, a seventh resistor, a tenth capacitor, and an eleventh capacitor. The P3.3 / ADC11 / INT1 / MISO_4 / I2CSDA_4 terminal of the single-chip microcomputer is connected to the positive electrode of the first diode, the Vcc / AVcc / ADC_VRef+ terminal of the single-chip microcomputer is respectively connected to the first end of the tenth capacitor and the first end of the eleventh capacitor, the second end of the tenth capacitor and the second end of the eleventh capacitor are both grounded, the CCP0 / TxD2 / ADC1 / P1.1 terminal of the single-chip microcomputer is connected to the GPIO0 terminal of the 2.4G low-power Bluetooth chip, and the CCP1 / RxD2 / ADC0 / P1.0 terminal of the single-chip microcomputer is connected to the GPIO1 terminal of the 2.4G low-power Bluetooth chip.

6. The personnel card circuit based on NFC and BLE technology according to claim 5, characterized in that: The NFC circuit includes an NFC chip, a fifth resistor, a sixth resistor, a tenth resistor, an eighth capacitor, a ninth capacitor, a twelfth capacitor, a thirteenth capacitor, and an NFC coil. The first end of the tenth resistor is connected to the first end of the seventh capacitor, the second end of the tenth resistor is respectively connected to the first end of the tenth capacitor, the first end of the fifth resistor, the first end of the sixth resistor, the first end of the eighth capacitor, and the VCC end of the NFC chip. The SDA end of the NFC chip is connected to the second end of the fifth resistor, the SCL end of the NFC chip is connected to the second end of the sixth resistor, the VOUT end of the NFC chip is connected to the ninth capacitor and then grounded. The IN1 end of the chip is respectively connected to the first end of the twelfth capacitor, the first end of the thirteenth capacitor and the first end of the NFC coil, the IN2 end of the NFC chip is respectively connected to the second end of the twelfth capacitor, the second end of the thirteenth capacitor and the second end of the NFC coil, the CSN end of the NFC chip is connected to the XTALO / MCLKO_2 / RxD_3 / ADC6 / P1.6 end of the microcontroller, the SCL end of the NFC chip is connected to the I2CSCL / SCLK / ADC5 / P1.5 end of the microcontroller, and the IRQ end of the NFC chip is connected to the P3.2 / ADC10 / INT0 / SCLK_4 / I2CSCL_4 end of the microcontroller.

7. The personnel card circuit based on NFC and BLE technology according to claim 6, characterized in that: The LED lamp circuit includes an eighth resistor and a light emitting diode. The first end of the eighth resistor is connected to the P5.5 terminal of the single chip computer. The second end of the eighth resistor is connected in series with the light emitting diode and then grounded.

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