Magnetic detachable RFID acousto-optic electronic tag

Abstract

The utility model relates to radio frequency wireless electronic circuit technical field especially, and more particularly to a kind of magnetically attractable dismountable RFID sound-light electronic tag, when using, base is bound and fixed on the external installed body, then the main body is magnetically attracted and fixed on base, wherein, anti-theft switch detects whether body is separated from base;When main control circuit detects that body and base are illegally separated by anti-theft switch, control sound-light alarm circuit to carry out sound-light alarm, RFID antenna and external reader-writer or mobile terminal are wirelessly connected, and main control circuit reads / write inventory information and on / off switch power mode;When the signal strength of WiFi module connection WiFi hotspot is lower than rated value, main control circuit controls sound-light alarm circuit to carry out sound-light alarm;WiFi module is also connected to remote server or mobile terminal by WiFi hotspot, and magnetically attractable dismountable RFID sound-light electronic tag is set remotely;To realize that quick replacement maintenance charging can be carried out, and have sound-light alarm, anti-theft alarm and other functions, intelligent degree is high, and small in size.

Description

Technical Field

[0001] This utility model relates to the field of radio frequency wireless electronic circuit technology, and more specifically, to a magnetically detachable RFID audio-visual electronic tag. Background Technology

[0002] Existing RFID tags are widely used in logistics, warehousing, and equipment management, especially RFID electronic tags with audible and visual alarm functions, which can provide better intelligent management functions in personnel inspection, automatic identification, and alarm prompts. However, most RFID audible and visual tags are currently installed using screws or adhesive, which has problems such as cumbersome installation, inability to quickly disassemble, inconvenience in replacement, maintenance, and charging, and damage to equipment surfaces.

[0003] Therefore, it is necessary to provide a magnetic RFID electronic tag that is simple in structure, quick to install, reusable, and has audible and visual prompts. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a magnetically detachable RFID audio-visual electronic tag that is simple in circuitry, simple in structure, small in size, highly intelligent, and can be quickly replaced, maintained, and charged, in view of the above-mentioned defects of the prior art.

[0005] The technical solution adopted by this utility model to solve its technical problem is:

[0006] A magnetically detachable RFID audio-visual electronic tag is constructed, comprising a magnetically detachable shell and a circuit board; wherein, the magnetically detachable shell includes: a base and a body, the base is bound and fixed to an external mounting body, the base magnetically fixes the body, and the circuit board is disposed within the body;

[0007] The circuit board is equipped with a main control circuit, an RFID antenna, and an audible and visual alarm circuit. The main control circuit is connected to the RFID antenna and the audible and visual alarm circuit respectively. The anti-theft switch is connected to the main control circuit. The anti-theft switch detects whether the main body is separated from the base.

[0008] When the main control circuit detects that the main body and the base are illegally separated through the anti-theft switch, it controls the sound and light alarm circuit to perform a sound and light alarm. The RFID antenna is wirelessly connected to an external reader or mobile terminal to read / write inventory information and turn the battery swapping mode on / off through the main control circuit.

[0009] The main control circuit is also connected to a WiFi module, which is wirelessly connected to a WiFi hotspot. When the signal strength of the WiFi module connected to the WiFi hotspot is lower than the rated value, the main control circuit controls the audible and visual alarm circuit to perform an audible and visual alarm. The WiFi module can also connect to a remote server or mobile terminal through the WiFi hotspot to remotely configure the magnetically detachable RFID audible and visual electronic tag.

[0010] The magnetically detachable RFID audio-visual electronic tag of this utility model includes a battery connected to the anti-theft switch, the WiFi module, the main control circuit, and the audio-visual alarm circuit to provide power.

[0011] The battery is also connected to a charging indicator circuit, which is connected to a TYPE-C female connector. The TYPE-C female connector is connected to an external charger to charge the battery.

[0012] The charging indicator circuit displays the charging status and the fully charged status.

[0013] The magnetically detachable RFID audio-visual electronic tag of this utility model includes a charging indicator circuit comprising: a transistor, a first resistor, a second resistor, a first light-emitting diode, and a second light-emitting diode.

[0014] The VBUS terminals of the TYPE-C female connector are all connected to the anode of the first diode. The cathode of the first diode is connected to the first resistor and the transmitter of the transistor. The other end of the first resistor is connected to the second resistor and the base of the transistor. The collector of the transistor is connected to the anode of the first LED. The cathode of the first LED is connected to the third resistor. The other end of the second resistor is connected to the anode of the battery. The cathode of the battery is grounded. The anode of the battery is also connected to the anode of the second diode. The cathode of the second diode is the 3.3V output terminal.

[0015] The VBUS terminals of the TYPE-C female connector are all connected to a fourth resistor, the other end of the fourth resistor is connected to the positive terminal of the second light-emitting diode, and the other end of the third resistor and the negative terminal of the second light-emitting diode are both grounded.

[0016] The multiple GND terminals of the TYPE-C female connector are all grounded.

[0017] The magnetically detachable RFID audio-visual electronic tag of this utility model includes a main control circuit comprising a wireless transceiver chip and an RFID antenna.

[0018] The TX1 terminal of the wireless transceiver chip is connected to a first inductor, the other end of the first inductor is connected to a first capacitor and a second capacitor, the other end of the first capacitor is connected to a fifth resistor and a third capacitor, the other end of the fifth resistor is connected to the TX1 terminal of the RFID antenna, and the other ends of the second capacitor and the third capacitor are both grounded.

[0019] The TX2 terminal of the wireless transceiver chip is connected to a second inductor, the other end of the second inductor is connected to a fourth capacitor and a fifth capacitor, the other end of the fourth capacitor is connected to a sixth resistor and a sixth capacitor, the other end of the sixth resistor is connected to the TX2 terminal of the RFID antenna, and the other ends of the fifth capacitor and the sixth capacitor are both grounded.

[0020] The GND terminal of the RFID antenna is also grounded. The RX terminal of the wireless transceiver chip is connected to a seventh capacitor. The other end of the seventh capacitor is connected to a seventh resistor. The other end of the seventh resistor is connected to the other end of the second inductor.

[0021] The VBAT terminal of the wireless transceiver chip is connected to the 3.3V output terminal, and the DVSS terminal is grounded.

[0022] The magnetically detachable RFID audio-visual electronic tag of this utility model includes an anti-theft switch connected to the SCK / P72 terminal of the wireless transceiver chip and the other end connected to the 3.3V output terminal. An eighth capacitor is connected in parallel with the anti-theft switch.

[0023] The magnetically detachable RFID audio-visual electronic tag of this utility model includes an audio-visual alarm circuit comprising a third light-emitting diode, a fourth light-emitting diode, and a buzzer.

[0024] The 3.3V output terminal is connected to an eighth resistor and a ninth resistor. The other end of the eighth resistor is connected to the positive terminal of the third LED, and the negative terminal of the third LED is connected to the P32_INT0 terminal of the wireless transceiver chip. The other end of the ninth resistor is connected to the positive terminal of the fourth LED, and the negative terminal of the fourth LED is connected to the P33_INT1 terminal of the wireless transceiver chip.

[0025] The 3.3V output terminal is connected to the positive terminal of the buzzer, the negative terminal of the buzzer is connected to the drain of the field-effect transistor, the source of the field-effect transistor is grounded and the gate is connected to the P34 / SIC_CLK terminal of the wireless transceiver chip, and a tenth resistor is connected in parallel between the gate and the source of the field-effect transistor.

[0026] The magnetically detachable RFID audio-visual electronic tag of this utility model includes a WiFi module of model ESP826601S. The TX and RX terminals of the WiFi module are connected one-to-one with the HSU_RX and HSU_TX terminals of the wireless transceiver chip in sequence. The RST terminal of the WiFi module is connected to the RSTOUT_N terminal of the wireless transceiver chip.

[0027] The 3V3 terminal of the WiFi module is connected to the 3.3V output terminal, and the GND terminal is grounded.

[0028] The magnetically detachable RFID audio-visual electronic tag of this utility model contains a wireless transceiver chip of model number PN5321A3HN.

[0029] The magnetically detachable RFID audio-visual electronic tag of this utility model includes an RFID tag fixedly connected to the base, and the main control circuit reads the information of the RFID tag through the RFID antenna to bind the main body and the base.

[0030] The RFID tag is equipped with a touch switch. When the body is combined with the base, pressing the touch switch will disable the RFID tag, and vice versa. When the body moves away from the base, the RFID antenna will read the information of the RFID tag.

[0031] The magnetically detachable RFID audio-visual electronic tag of this utility model has multiple fixing holes on the base for the binding strap to pass through, and a magnet and multiple guide positioning posts are fixedly connected to the base.

[0032] The main body is provided with multiple positioning holes and iron pieces. The multiple positioning holes are directly opposite to the multiple guide positioning posts. The positioning holes cooperate with the guide positioning posts. The iron pieces are directly opposite the magnet and match the magnet.

[0033] The pressing end of the anti-theft switch faces the end face of the base that is close to the main body, and the pressing end of the tactile switch faces the end face of the main body that is close to the base.

[0034] The beneficial effects of this utility model are as follows: During use, the base is bound and fixed to the external installation body, and then the main body is magnetically fixed to the base. An anti-theft switch detects whether the main body is separated from the base. When the main control circuit detects illegal separation of the main body from the base via the anti-theft switch, it controls the audible and visual alarm circuit to activate the alarm. The RFID antenna wirelessly connects to an external reader or mobile terminal, reading / writing inventory information and switching the battery swapping mode on / off via the main control circuit. When the signal strength of the WiFi module connected to the WiFi hotspot is lower than the rated value, the main control circuit controls the audible and visual alarm circuit to activate the alarm. The WiFi module also connects to a remote server or mobile terminal via the WiFi hotspot to remotely set the magnetically detachable RFID audible and visual electronic tags. This enables rapid replacement, maintenance, and charging, and features audible and visual alarms, anti-theft alarms, and other functions. It is highly intelligent, small in size, easy to use, and widely applicable. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the utility model will be further described below in conjunction with the accompanying drawings and embodiments. The drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0036] Figure 1 This is a circuit diagram of the main control circuit of the magnetically detachable RFID audio-visual electronic tag according to a preferred embodiment of the present invention.

[0037] Figure 2 This is a circuit diagram of the RFID antenna of a magnetically detachable RFID audio-visual electronic tag according to a preferred embodiment of the present invention.

[0038] Figure 3 This is a circuit diagram of the sound and light alarm circuit of the magnetically detachable RFID sound and light electronic tag according to a preferred embodiment of the present invention.

[0039] Figure 4 This is a circuit diagram of the anti-theft switch for a magnetically detachable RFID audio-visual electronic tag, which is a preferred embodiment of this utility model.

[0040] Figure 5 This is a circuit diagram of the WiFi module of a magnetically detachable RFID audio-visual electronic tag according to a preferred embodiment of the present invention.

[0041] Figure 6 This is a circuit diagram of the charging indicator circuit of the magnetically detachable RFID audio-visual electronic tag according to a preferred embodiment of the present invention.

[0042] Figure 7This is a circuit diagram of the TYPE-C female connector of the magnetically detachable RFID audio-visual electronic tag according to a preferred embodiment of the present invention.

[0043] Figure 8 This is an exploded view of a magnetically detachable RFID audio-visual electronic tag according to a preferred embodiment of the present invention. Detailed Implementation

[0044] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, a clear and complete description will be provided below in conjunction with the technical solutions in the embodiments of this utility model. Obviously, the described embodiments are some, but not all, embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0045] The preferred embodiment of this utility model is a magnetically detachable RFID acoustic-optical electronic tag, such as... Figure 1 As shown, see also Figures 2 to 8 It includes a magnetically detachable housing 100 and a circuit board (not shown in the figure); wherein, the magnetically detachable housing 100 includes: a base 110 and a body 120, the base 110 is bound and fixed to the external mounted body, the base 110 magnetically fixes the body 120, and the circuit board is located inside the body 120.

[0046] The circuit board is equipped with a main control circuit 200, an RFID antenna A1, and an audible and visual alarm circuit 300. The main control circuit 200 is connected to the RFID antenna A1 and the audible and visual alarm circuit 300 respectively. The anti-theft switch SW1 is connected to the main control circuit 200. The anti-theft switch SW1 detects whether the body 120 is separated from the base 110.

[0047] When the main control circuit 200 detects that the main body 120 and the base 110 are illegally separated through the anti-theft switch SW1, it controls the sound and light alarm circuit 300 to perform a sound and light alarm. The RFID antenna A1 is wirelessly connected to an external reader or mobile terminal to read / write inventory information and turn on / off the battery swapping mode through the main control circuit 200.

[0048] The main control circuit 200 is also connected to a WiFi module U9. The WiFi module U9 is wirelessly connected to a WiFi hotspot. When the signal strength of the WiFi module U9 connected to the WiFi hotspot is lower than the rated value, the main control circuit 200 controls the audible and visual alarm circuit 300 to perform an audible and visual alarm. The WiFi module U9 can also connect to a remote server or mobile terminal through the WiFi hotspot to remotely set the magnetically detachable RFID audible and visual electronic tag.

[0049] In use, the base 110 is bound and fixed to the external mounting body, and then the main body 120 is magnetically fixed to the base 110. The anti-theft switch SW1 detects whether the main body 120 is separated from the base 110. When the main control circuit 200 detects illegal separation of the main body 120 from the base 110 via the anti-theft switch SW1, it controls the audible and visual alarm circuit 300 to activate the audible and visual alarm. The RFID antenna A1 wirelessly connects to an external reader or mobile terminal, and the main control circuit 200 reads / writes inventory information and switches the battery swapping mode on / off. When the signal strength of the WiFi module U9 connected to the WiFi hotspot is lower than the rated value, the main control circuit 200 controls the audible and visual alarm circuit 300 to activate the audible and visual alarm. The WiFi module U9 also connects to a remote server or mobile terminal via the WiFi hotspot to remotely set the magnetically detachable RFID audible and visual electronic tags. This allows for quick replacement, maintenance, and charging, and features audible and visual alarms, anti-theft alarms, and other functions. It is highly intelligent, small in size, easy to use, and widely applicable.

[0050] like Figures 2 to 7 As shown, battery U4 is connected to anti-theft switch SW1, WiFi module U9, main control circuit 200 and sound and light alarm circuit 300 respectively to provide power supply;

[0051] Battery U4 is also connected to a charging indicator circuit 400, which is connected to a TYPE-C female USB1. The TYPE-C female USB1 is connected to an external charger to charge battery U4.

[0052] The charging indicator circuit 400 displays the charging status and the fully charged status; it uses a TYPE-C female USB1 port for charging, making it widely applicable.

[0053] like Figure 6 and Figure 7 As shown, the charging indicator circuit 400 includes: transistor Q1, first resistor R18, second resistor R19, first light-emitting diode LED4, and second light-emitting diode LED1;

[0054] Multiple VBUS terminals of the TYPE-C female USB1 are connected to the anode of the first diode U5. The cathode of the first diode U5 is connected to the first resistor R18 and the transmitter of transistor Q1. The other end of the first resistor R18 is connected to the second resistor R19 and the base of transistor Q1. The collector of transistor Q1 is connected to the anode of the first LED4. The cathode of the first LED4 is connected to the third resistor R20. The other end of the second resistor R19 is connected to the anode of battery U4. The cathode of battery U4 is grounded. The anode of battery U4 is also connected to the anode of the second diode U6. The cathode of the second diode U6 is the 3.3V output terminal, and the output voltage is approximately 3.3V.

[0055] The multiple VBUS terminals of the TYPE-C female USB1 are all connected to the fourth resistor R5. The other end of the fourth resistor R5 is connected to the positive terminal of the second light-emitting diode LED1. The other end of the third resistor R20 and the negative terminal of the second light-emitting diode LED1 are both grounded.

[0056] Multiple GND terminals of the TYPE-C female USB1 are grounded; the first LED4 indicates the fully charged status and turns off after the battery U4 is fully charged, and the second LED1 indicates the charging status; the first diode U5 and the second diode U6 are used for voltage drop, with a voltage drop of about 0.7V, to meet the voltage requirements for charging the battery U4 and supplying power to the product, and are low in cost and small in size.

[0057] like Figure 1 and Figure 6 As shown, the main control circuit 200 includes: a wireless transceiver chip U1 and an RFID antenna A1;

[0058] The TX1 terminal of the wireless transceiver chip U1 is connected to the first inductor L3. The other end of the first inductor L3 is connected to the first capacitor C24 and the second capacitor C22. The other end of the first capacitor C24 is connected to the fifth resistor R16 and the third capacitor C30. The other end of the fifth resistor R16 is connected to the TX1 terminal of the RFID antenna A1. The other ends of the second capacitor C22 and the third capacitor C30 are both grounded.

[0059] The TX2 terminal of the wireless transceiver chip U1 is connected to the second inductor L4. The other end of the second inductor L4 is connected to the fourth capacitor C25 and the fifth capacitor C23. The other end of the fourth capacitor C25 is connected to the sixth resistor R17 and the sixth capacitor C31. The other end of the sixth resistor R17 is connected to the TX2 terminal of the RFID antenna A1. The other ends of the fifth capacitor C23 and the sixth capacitor C31 are both grounded.

[0060] The GND terminal of RFID antenna A1 is also grounded. The RX terminal of wireless transceiver chip U1 is connected to the seventh capacitor C21. The other end of the seventh capacitor C21 is connected to the seventh resistor R15. The other end of the seventh resistor R15 is connected to the other end of the second inductor L4. This is to achieve filtering and impedance matching of RFID antenna A1, and to meet the usage requirements of RFID antenna A1. RFID antenna A1 is an NFC antenna.

[0061] The VBAT terminal of the wireless transceiver chip U1 is connected to the 3.3V output terminal, and the DVSS terminal is grounded.

[0062] like Figure 1 and Figure 4 as well as Figure 6As shown, the anti-theft switch SW1 is connected to the SCK / P72 terminal of the wireless transceiver chip U1, and the other end is connected to the 3.3V output terminal. The anti-theft switch SW1 is connected in parallel with the eighth capacitor C32 to filter and prevent false alarms.

[0063] like Figure 1 and Figure 3 as well as Figure 6 As shown, the audible and visual alarm circuit 300 includes: a third light-emitting diode LED2 and a fourth light-emitting diode LED3, as well as a buzzer BUZZER1;

[0064] The 3.3V output terminal is connected to the eighth resistor R6 and the ninth resistor R7. The other end of the eighth resistor R6 is connected to the positive terminal of the third LED2, and the negative terminal of the third LED2 is connected to the P32_INT0 terminal of the wireless transceiver chip U1. The other end of the ninth resistor R7 is connected to the positive terminal of the fourth LED3, and the negative terminal of the fourth LED3 is connected to the P33_INT1 terminal of the wireless transceiver chip U1.

[0065] The 3.3V output terminal is connected to the positive terminal of the buzzer BUZZER1, and the negative terminal of the buzzer BUZZER1 is connected to the drain of the field-effect transistor Q2. The source of the field-effect transistor Q2 is grounded and its gate is connected to the P34 / SIC_CLK terminal of the wireless transceiver chip U1. The gate and source of the field-effect transistor Q2 are connected in parallel with the tenth resistor R21. The circuit is simple, low in cost, and small in size. The buzzer BUZZER1 is an active buzzer BUZZER1.

[0066] like Figure 1 and Figure 5 as well as Figure 6 As shown, the WiFi module U9 is model ESP826601S. The TX and RX terminals of the WiFi module U9 are connected one-to-one with the HSU_RX and HSU_TX terminals of the wireless transceiver chip U1 in sequence. The RST terminal of the WiFi module U9 is connected to the RSTOUT_N terminal of the wireless transceiver chip U1.

[0067] The 3V3 terminal of the WiFi module U9 is connected to the 3.3V output terminal and the GND terminal is grounded; it is low in cost and small in size.

[0068] like Figure 1 As shown, the wireless transceiver chip U1, model PN5321A3HN, features high integration, low cost, small size, and strong stability.

[0069] like Figure 8As shown, an RFID tag 111 is fixedly connected to the base 110. The main control circuit 200 reads the information of the RFID tag 111 through the RFID antenna A1 to bind the main body 120 to the base 110. This achieves a non-one-to-one binding between the main body 120 and the base 110 (dynamic binding), while the base 110 is bound one-to-one with the external installed object. This allows the base 110 to automatically bind with the external installed object when the main body 120 is replaced, eliminating the need for manual operation and demonstrating a high degree of intelligence.

[0070] The RFID tag 111 is equipped with a tactile switch 112 (which controls the on / off state of the coil of the RFID tag 111). When the body 120 is combined with the base 110, pressing the tactile switch 112 disables the RFID tag 111; conversely, when the body 120 is close to the base 110, the RFID tag 111 is active. When the body 120 is placed on the base 110, the RFID antenna A1 can quickly read the information of the RFID tag 111. Furthermore, the tactile switch 112 is a membrane switch, which is easy to manufacture and install, and is small in size and low in cost.

[0071] like Figure 8 As shown, the base 110 is provided with multiple fixing holes 113 for the binding strap (not shown in the figure) to pass through, and a magnet 130 and multiple guide positioning posts 140 are fixedly connected to the base 110.

[0072] The main body 120 is provided with multiple positioning holes (not shown in the figure) and iron pieces (not shown in the figure). The multiple positioning holes are directly opposite to multiple guide positioning posts 140, and the positioning holes cooperate with the guide positioning posts 140. The iron pieces are directly opposite to the magnet 130 and are matched with the magnet 130.

[0073] The pressing end of the anti-theft switch SW1 is directly opposite the end face of the base 110 near the body 120, and the pressing end of the tactile switch 112 is directly opposite the end face of the body 120 near the base 110; the structure is simple and the cost is low.

[0074] Among them, the magnet 130 is kept away from the RFID antenna A1 to avoid magnetic interference, and the RFID tag 111 is facing the RFID antenna A1 to quickly read the information of the RFID tag 111; furthermore, the RFID antenna A1 is provided with dual coils, one coil reads the information of the RFID tag 111, and the other coil is wirelessly connected to an external reader or mobile terminal.

[0075] Furthermore, the end face of the main body 120 away from the base 110 is provided with an identification area 121 to identify external readers or mobile terminals. A QR code can also be pasted on the identification area 121 to meet different usage needs.

[0076] It should be understood that those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A magnetically detachable RFID audio-visual electronic tag, comprising a magnetically detachable housing and a circuit board; characterized in that, The magnetically detachable housing includes a base and a body. The base is fixed to the external mounting body, and the base magnetically fixes the body. The circuit board is located inside the body. The circuit board is equipped with a main control circuit, an RFID antenna, and an audible and visual alarm circuit. The main control circuit is connected to the RFID antenna and the audible and visual alarm circuit respectively. The anti-theft switch is connected to the main control circuit. The anti-theft switch detects whether the main body is separated from the base. When the main control circuit detects that the main body and the base are illegally separated through the anti-theft switch, it controls the sound and light alarm circuit to perform a sound and light alarm. The RFID antenna is wirelessly connected to an external reader or mobile terminal to read / write inventory information and turn the battery swapping mode on / off through the main control circuit. The main control circuit is also connected to a WiFi module, which is wirelessly connected to a WiFi hotspot. When the signal strength of the WiFi module connected to the WiFi hotspot is lower than the rated value, the main control circuit controls the audible and visual alarm circuit to perform an audible and visual alarm. The WiFi module can also connect to a remote server or mobile terminal through the WiFi hotspot to remotely configure the magnetically detachable RFID audible and visual electronic tag.

2. The magnetically detachable RFID acoustic-optical electronic tag according to claim 1, characterized in that, The battery is connected to the anti-theft switch, the WiFi module, the main control circuit, and the audible and visual alarm circuit respectively to provide power supply; The battery is also connected to a charging indicator circuit, which is connected to a TYPE-C female connector. The TYPE-C female connector is connected to an external charger to charge the battery. The charging indicator circuit displays the charging status and the fully charged status.

3. The magnetically detachable RFID acoustic-optical electronic tag according to claim 2, characterized in that, The charging indicator circuit includes: a transistor, a first resistor, a second resistor, a first light-emitting diode, and a second light-emitting diode; The VBUS terminals of the TYPE-C female connector are all connected to the anode of the first diode. The cathode of the first diode is connected to the first resistor and the transmitter of the transistor. The other end of the first resistor is connected to the second resistor and the base of the transistor. The collector of the transistor is connected to the anode of the first LED. The cathode of the first LED is connected to the third resistor. The other end of the second resistor is connected to the anode of the battery. The cathode of the battery is grounded. The anode of the battery is also connected to the anode of the second diode. The cathode of the second diode is the 3.3V output terminal. The VBUS terminals of the TYPE-C female connector are all connected to a fourth resistor, the other end of the fourth resistor is connected to the positive terminal of the second light-emitting diode, and the other end of the third resistor and the negative terminal of the second light-emitting diode are both grounded. The multiple GND terminals of the TYPE-C female connector are all grounded.

4. The magnetically detachable RFID acoustic-optical electronic tag according to claim 3, characterized in that, The main control circuit includes: a wireless transceiver chip and the RFID antenna; The TX1 terminal of the wireless transceiver chip is connected to a first inductor, the other end of the first inductor is connected to a first capacitor and a second capacitor, the other end of the first capacitor is connected to a fifth resistor and a third capacitor, the other end of the fifth resistor is connected to the TX1 terminal of the RFID antenna, and the other ends of the second capacitor and the third capacitor are both grounded. The TX2 terminal of the wireless transceiver chip is connected to a second inductor, the other end of the second inductor is connected to a fourth capacitor and a fifth capacitor, the other end of the fourth capacitor is connected to a sixth resistor and a sixth capacitor, the other end of the sixth resistor is connected to the TX2 terminal of the RFID antenna, and the other ends of the fifth capacitor and the sixth capacitor are both grounded. The GND terminal of the RFID antenna is also grounded. The RX terminal of the wireless transceiver chip is connected to a seventh capacitor. The other end of the seventh capacitor is connected to a seventh resistor. The other end of the seventh resistor is connected to the other end of the second inductor. The VBAT terminal of the wireless transceiver chip is connected to the 3.3V output terminal, and the DVSS terminal is grounded.

5. The magnetically detachable RFID acoustic-optical electronic tag according to claim 4, characterized in that, The anti-theft switch is connected to the SCK / P72 terminal of the wireless transceiver chip and the other end is connected to the 3.3V output terminal. The anti-theft switch is connected in parallel with an eighth capacitor.

6. The magnetically detachable RFID acoustic-optical electronic tag according to claim 4, characterized in that, The audible and visual alarm circuit includes: a third light-emitting diode, a fourth light-emitting diode, and a buzzer; The 3.3V output terminal is connected to an eighth resistor and a ninth resistor. The other end of the eighth resistor is connected to the positive terminal of the third LED, and the negative terminal of the third LED is connected to the P32_INT0 terminal of the wireless transceiver chip. The other end of the ninth resistor is connected to the positive terminal of the fourth LED, and the negative terminal of the fourth LED is connected to the P33_INT1 terminal of the wireless transceiver chip. The 3.3V output terminal is connected to the positive terminal of the buzzer, the negative terminal of the buzzer is connected to the drain of the field-effect transistor, the source of the field-effect transistor is grounded and the gate is connected to the P34 / SIC_CLK terminal of the wireless transceiver chip, and a tenth resistor is connected in parallel between the gate and the source of the field-effect transistor.

7. The magnetically detachable RFID acoustic-optical electronic tag according to claim 4, characterized in that, The WiFi module is model ESP826601S. The TX and RX terminals of the WiFi module are connected one-to-one with the HSU_RX and HSU_TX terminals of the wireless transceiver chip in sequence. The RST terminal of the WiFi module is connected to the RSTOUT_N terminal of the wireless transceiver chip. The 3V3 terminal of the WiFi module is connected to the 3.3V output terminal, and the GND terminal is grounded.

8. The magnetically detachable RFID acoustic-optical electronic tag according to claim 4, characterized in that, The wireless transceiver chip is model PN5321A3HN.

9. The magnetically detachable RFID acoustic-optical electronic tag according to claim 1, characterized in that, An RFID tag is fixedly connected to the base, and the main control circuit reads the information of the RFID tag through the RFID antenna to bind the main body and the base. The RFID tag is equipped with a touch switch. When the body is combined with the base, pressing the touch switch disables the RFID tag; otherwise, the RFID tag is enabled. When the body moves away from the base, the RFID antenna reads the information of the RFID tag.

10. The magnetically detachable RFID acoustic-optical electronic tag according to claim 9, characterized in that, The base is provided with multiple fixing holes for the binding strap to pass through, and a magnet and multiple guide positioning posts are fixedly connected to the base; The main body is provided with multiple positioning holes and iron pieces. The multiple positioning holes are directly opposite to the multiple guide positioning posts. The positioning holes cooperate with the guide positioning posts. The iron pieces are directly opposite the magnet and match the magnet. The pressing end of the anti-theft switch faces the end face of the base that is close to the main body, and the pressing end of the tactile switch faces the end face of the main body that is close to the base.

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