CN216352743U

CN216352743U - Anti-dismantling alarm beacon bracelet circuit

Info

Publication number: CN216352743U
Application number: CN202123062346.9U
Authority: CN
Inventors: 扈曙辉; 黎萍
Original assignee: Shenzhen Kangkaiming Technology Co ltd
Current assignee: Shenzhen Kangkaiming Technology Co ltd
Priority date: 2021-12-07
Filing date: 2021-12-07
Publication date: 2022-04-19
Anticipated expiration: 2031-12-07

Abstract

The utility model discloses an anti-dismantling alarm beacon bracelet circuit, which comprises: the device comprises a Bluetooth module, a voltage reduction circuit, a high-frequency crystal oscillator circuit, a low-frequency crystal oscillator circuit, a radio frequency circuit, a first TVS (transient voltage suppressor) tube circuit, a second TVS tube circuit, an SOS (sequence of events) key circuit, an indicator lamp circuit and a detection module; the Bluetooth module comprises a Bluetooth chip; the corresponding ends of the Bluetooth chip are respectively and electrically connected with corresponding ends of a voltage reduction circuit, a high-frequency crystal oscillator circuit, a low-frequency crystal oscillator circuit, a radio frequency circuit, an SOS key circuit, an indicator light circuit and a detection module; the corresponding end of the detection module is electrically connected with the corresponding ends of the first TVS tube circuit and the second TVS tube circuit respectively. The utility model adopts a double-crystal oscillator mode, can work for several months under the condition that the product is powered by a button battery, realizes that the bracelet and the watchband are cut off by detecting the copper wire, and avoids the high cost caused by detecting the skin of a human body by adopting a photoelectric sensor arranged in the bottom of the bracelet in the market at present.

Description

Anti-dismantling alarm beacon bracelet circuit

Technical Field

The utility model relates to the technical field of bracelet circuits, in particular to an anti-dismantling alarm beacon bracelet circuit.

Background

At present, the medical industry widely adopts the NFC bracelet to patient. The bracelet is waterproof and non-detachable, and can be used for medical payment or information registration of patient examination. With the administrative needs of patients or specific personnel in some hospitals or institutions, patients or specific personnel are required to move only in designated areas. Such as during codid, isolated patients are not allowed to exit the ward. Furthermore, it is not allowed to leave an isolated room for entry or for quarantine requiring personnel to be isolated at the hotel.

The existing technology in the market at present is the GPS bracelet that prison used, and this bracelet adopts firm watchband design, often adopts screw and five metals design to combine to prevent tearing open, and the design life-span is more than 5 years usually, and the price is all between 300 ~ 1000 yuan, therefore the cost is relatively high, can't promote on a large scale. Still there is another kind of bracelet in addition on the market, through the place built-in optical sensing equipment in bracelet bottom and human contact, detects whether the human body carries the wrist-watch through the optical reflection of human skin, but this kind can bring the great consumption of product, and is with high costs, and it can only work about 1 week to charge usually once.

SUMMERY OF THE UTILITY MODEL

Aiming at the problems in the prior art, the utility model provides an anti-dismantling alarm beacon bracelet circuit.

In order to achieve the purpose, the technical scheme of the utility model is as follows:

an anti-dismantle alarm beacon bracelet circuit, comprising: the device comprises a Bluetooth module, a voltage reduction circuit, a high-frequency crystal oscillator circuit, a low-frequency crystal oscillator circuit, a radio frequency circuit, a first TVS (transient voltage suppressor) tube circuit, a second TVS tube circuit, an SOS (sequence of events) key circuit, an indicator lamp circuit and a detection module; the Bluetooth module comprises a Bluetooth chip; the corresponding ends of the Bluetooth chip are respectively and electrically connected with corresponding ends of a voltage reduction circuit, a high-frequency crystal oscillator circuit, a low-frequency crystal oscillator circuit, a radio frequency circuit, an SOS key circuit, an indicator light circuit and a detection module; the corresponding end of the detection module is also electrically connected with the corresponding ends of the first TVS tube circuit and the second TVS tube circuit respectively; first TVS pipe circuit, second TVS pipe circuit still with the copper connection of bracelet.

Preferably, the high-frequency crystal oscillator circuit comprises a high-frequency crystal oscillator C1, a resistor R3 and a resistor R4; one end of the high-frequency crystal oscillator C1 is electrically connected with one end of the resistor R3 and the P11 port of the Bluetooth chip respectively, and the other end of the high-frequency crystal oscillator C1 is electrically connected with one end of the resistor R4 and the P12 port of the Bluetooth chip respectively; the other end of the resistor R3 and the other end of the resistor R4 are grounded.

Preferably, the low-frequency crystal oscillator circuit comprises a low-frequency crystal oscillator C2, a resistor R1 and a resistor R2; one end of the high-frequency crystal oscillator C2 is electrically connected with one end of the resistor R1 and the P61 port of the Bluetooth chip respectively, and the other end of the high-frequency crystal oscillator C2 is electrically connected with one end of the resistor R2 and the P62 port of the Bluetooth chip respectively; the other end of the resistor R1 and the other end of the resistor R2 are grounded.

Preferably, radio frequency circuit one end and bluetooth chip P3 port electric connection, the other end still with bluetooth antenna electric connection, this bluetooth antenna adopts on-board PCB antenna.

Preferably, the corresponding ends of the detection module are electrically connected with the P4 interface and the P5 interface corresponding to the bluetooth chip, respectively.

Preferably, the first TVS transistor circuit includes a first TVS transistor T1, a P51 port of the first TVS transistor T1 is electrically connected to a corresponding end of the detection module, and a P52 port of the first TVS transistor T1 is electrically connected to an end of the copper wire.

Preferably, the second TVS transistor circuit includes a second TVS transistor T2 and a pull-up resistor R5, a P54 port of the second TVS transistor T2 is electrically connected to a corresponding end of the detection module and one end of the pull-up resistor R5, and a P53 port of the second TVS transistor T2 is correspondingly connected to the other end of the copper wire; the other end of the pull-up resistor R5 is electrically connected with a VCC end.

Preferably, the voltage reduction circuit is a DCDC voltage reduction circuit, and a corresponding end of the DCDC voltage reduction circuit is electrically connected with the P0 port of the bluetooth chip.

Preferably, the SOS key circuit includes an SOS key K1, and a corresponding end of the SOS key K1 is electrically connected to the P7 port of the bluetooth chip.

Preferably, the indicator light circuit comprises an LED indicator light, and a corresponding end of the LED indicator light is electrically connected with the P8 port of the bluetooth chip.

By adopting the technical scheme of the utility model, the utility model has the following beneficial effects:

1. the circuit design of the utility model adopts a double-crystal oscillator mode, so that the product can work for several months under the condition of power supply of the button battery.

2. This circuit realizes through the detection to the copper wire that the bracelet watchband is cut, avoids adopting the built-in photoelectric sensor in bracelet bottom to detect the high cost that human skin brought on the market at present.

Drawings

FIG. 1 is a schematic circuit diagram of the present invention;

fig. 2 is a schematic view of the bracelet structure of the present invention.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the utility model and are not to be construed as limiting the utility model.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, a first feature "on" or "an over" a second feature unless expressly stated or limited otherwise

"under" may include the first and second features being in direct contact, and may also include the first and second features not being in direct contact, but being in contact with each other through additional features between them. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Referring to fig. 1 to 2, the present invention provides a tamper-proof alarm beacon bracelet circuit, including: the device comprises a Bluetooth module, a voltage reduction circuit 500, a high-frequency crystal oscillator circuit 300, a low-frequency crystal oscillator circuit 400, a radio frequency circuit 200, a first TVS (television set top box) tube circuit 800, a second TVS tube circuit 900, an SOS (sequence of signal output) key circuit, an indicator lamp circuit 600 and a detection module C5; the bluetooth module includes a bluetooth chip 100; the corresponding ends of the Bluetooth chip 100 are respectively and electrically connected with the corresponding ends of the voltage reduction circuit 500, the high-frequency crystal oscillator circuit 300, the low-frequency crystal oscillator circuit 400, the radio frequency circuit 200, the SOS key circuit, the indicator lamp circuit 600 and the detection module C5; the corresponding end of the detection module C5 is also electrically connected to the corresponding ends of the first TVS transistor circuit 800 and the second TVS transistor circuit 900, respectively; the first TVS transistor circuit 800 and the second TVS transistor circuit 900 are further connected to the copper wire 700 of the bracelet.

In this embodiment, the high-frequency crystal oscillator C1 is connected to a GPIO port of the bluetooth chip 100 through a P11 port and a P12 port, the high-frequency crystal oscillator C1 is connected to the ground through a resistor R3 and a resistor R4, and a resistor R3 and a resistor R4 are introduced to adjust the resistances of the resistor R3 and the resistor R4 according to differences of PCBs in different batches, so as to complete circuit matching and calibration of the crystal oscillator, thereby ensuring the accuracy of the crystal oscillator; the low-frequency crystal oscillator C2 is connected to the Bluetooth chip 100 through a P61 port and a P62 port, the low-frequency crystal oscillator C2 is connected to the ground through a resistor R1 and a resistor R2, and the purpose of introducing a resistor R1 and a resistor R2 in the same way is to ensure that crystal oscillator calibration is carried out on PCBs in different batches and ensure the accuracy of crystal oscillators, the reason for adopting the combination of the double crystal oscillators is that the high-frequency crystal oscillator C1 can provide a CPU operation clock with high speed of the Bluetooth chip 100 and a frequency clock of a radio frequency circuit of 2.4G, but the high-frequency crystal oscillator always operates and brings a large power consumption design to the chip, so the low-frequency crystal oscillator is introduced at the same time, when the Bluetooth chip does not transmit Bluetooth signals and data processing, namely the idle state of the Bluetooth chip, the low-frequency crystal oscillator is used for providing a clock to the Bluetooth chip, and the power consumption of the Bluetooth chip during operation can be greatly reduced; the high-frequency crystal oscillator circuit 300 comprises a high-frequency crystal oscillator C1, a resistor R3 and a resistor R4; one end of the high-frequency crystal oscillator C1 is electrically connected with one end of the resistor R3 and the P11 port of the Bluetooth chip respectively, and the other end of the high-frequency crystal oscillator C1 is electrically connected with one end of the resistor R4 and the P12 port of the Bluetooth chip respectively; the other end of the resistor R3 and the other end of the resistor R4 are grounded; the low-frequency crystal oscillator circuit 400 comprises a low-frequency crystal oscillator C2, a resistor R1 and a resistor R2; one end of the high-frequency crystal oscillator C2 is electrically connected with one end of the resistor R1 and the P61 port of the Bluetooth chip respectively, and the other end of the high-frequency crystal oscillator C2 is electrically connected with one end of the resistor R2 and the P62 port of the Bluetooth chip respectively; the other end of the resistor R1 and the other end of the resistor R2 are grounded.

Adopt the board to carry PCB antenna in this embodiment can reduce the cost of product, radio frequency circuit 200 one end and the P3 port electric connection of bluetooth chip 100, the other end still with bluetooth antenna electric connection, this bluetooth antenna adopts board to carry PCB antenna.

In this embodiment, the first TVS transistor circuit 800 and the second TVS transistor circuit 900 function to prevent static electricity from being conducted to the chip directly through the copper wire 700, and further breakdown the chip; the corresponding end of the detection module is electrically connected with the P4 interface and the P5 interface corresponding to the Bluetooth chip respectively; the detection module is set as an MCU module; the first TVS transistor circuit 800 includes a first TVS transistor T1, a P51 port of the first TVS transistor T1 is electrically connected to a corresponding end of the detection module, and a P52 port of the first TVS transistor T1 is electrically connected to an end of the copper wire 700; the second TVS transistor circuit 900 includes a second TVS transistor T2 and a pull-up resistor R5, a P54 port of the second TVS transistor T2 is electrically connected to a corresponding end of the detection module and one end of the pull-up resistor R5, and a P53 port of the second TVS transistor T2 is correspondingly connected to the other end of the copper wire 700; the other end of the pull-up resistor R5 is electrically connected with a VCC end.

In the embodiment, the bracelet is powered by the button cell, because the bluetooth chip 100 can work at the lowest voltage of 1.8V, and the voltage of the button cell is 3.0V, in order to reduce the power consumption of the product, the button cell is connected to the P0 port of the chip through the DCDC voltage reduction circuit, and the DCDC circuit is responsible for reducing the voltage from 3.0V to 1.8V, so that the power consumption of the product can be greatly reduced; the voltage-reducing circuit 500 is a DCDC voltage-reducing circuit, and a corresponding end of the DCDC voltage-reducing circuit is electrically connected to the P0 port of the bluetooth chip 100.

The SOS key circuit comprises an SOS key K1, wherein the corresponding end of the SOS key K1 is electrically connected with the P7 port of the Bluetooth chip 100; the indicator light circuit 600 includes an LED indicator light, and a corresponding end of the LED indicator light is electrically connected to the P8 port of the bluetooth chip 100.

Referring to fig. 2, the bracelet includes a watch dial 111, a first watchband 333 and a second watchband 444 connected with the watch dial 111, and an SOS button 222 disposed above the watch dial 111, wherein the first watchband 333 is provided with a plurality of watch holes 555 disposed side by side, the second watchband 444 is provided with a watch buckle 666 adapted to the watch holes 555, the first watchband 333 and the second watchband 444 are made of TPU materials commonly used in the medical industry at present, and the TPU materials are only 0.3mm thick, so that the bracelet is very portable in hand, wherein the TPU materials can wrap and seal the watch dial to achieve a waterproof effect; the watch dial 111 is made of circular plastic materials, and the size of the watch dial 111 is 36mm in diameter and 5mm in thickness; two enameled copper wires run a circle inside the double-layer TPU material along the edges of the first watchband 333 and the second watchband 444 to form a conductive loop, and in addition, in order to reduce the process difficulty, the two enameled copper wires 700 are directly adhered to the double-faced adhesive inside the TPU for fixing, so that a better waterproof effect can be achieved.

The working principle of the utility model is as follows:

the bracelet cutting detection module C5 defaults to set the P5 port and the P4 port of the Bluetooth chip 100 to high level, when the Bluetooth chip needs to detect whether the bracelet is cut, the Bluetooth chip 100 sets the P5 port to low level, delays for 1ms, then sets the P4 port to high level to be pulled up for input, if the bracelet is not cut, the VCC end passes through a resistor R5 and then reaches a copper wire, and then flows back to the P5 port, and at the moment, the P4 port is in a high level state; if the bracelet watchband is cut off, the VCC end passes through a resistor R5 to a P4 port, and the P4 port is at a high level; in order to avoid misjudgment, when the Bluetooth chip detects, if the watchband is detected to be cut off, the Bluetooth chip immediately and repeatedly initiates 3 times of detection, and if the P4 ports are detected for 3 times and are all high level, the watchband is considered to be cut off;

in order to reduce the power consumption of the product, the detection module C5 is not always in a detection state, and the module is periodically awakened by the low-frequency crystal oscillator C2 once every 1 second; when the watchband is detected to be cut off, continuously detecting for 3 times at a period of 20ms, and if the watchband is detected to be interrupted for 3 times, informing the Bluetooth chip broadcasting equipment of cutting off the Bluetooth broadcast message by using a detection module C5; the SOS key K1 is connected to the P7 port of the bluetooth chip 100, and when the SOS key K1 is pressed for more than 3 seconds, the bluetooth chip can detect the message, and then send out the bluetooth broadcast message of SOS emergency call, and at the same time send out the red flash of LED.

The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the technical solutions of the present invention, which are made by using the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. An anti-disassembly alarm beacon bracelet circuit, comprising: the device comprises a Bluetooth module, a voltage reduction circuit, a high-frequency crystal oscillator circuit, a low-frequency crystal oscillator circuit, a radio frequency circuit, a first TVS (transient voltage suppressor) tube circuit, a second TVS tube circuit, an SOS (sequence of events) key circuit, an indicator lamp circuit and a detection module; the Bluetooth module comprises a Bluetooth chip; the corresponding ends of the Bluetooth chip are respectively and electrically connected with corresponding ends of a voltage reduction circuit, a high-frequency crystal oscillator circuit, a low-frequency crystal oscillator circuit, a radio frequency circuit, an SOS key circuit, an indicator light circuit and a detection module; the corresponding end of the detection module is also electrically connected with the corresponding ends of the first TVS tube circuit and the second TVS tube circuit respectively; first TVS pipe circuit, second TVS pipe circuit still with the copper connection of bracelet.

2. The tamper-resistant alarm beacon bracelet circuit of claim 1, wherein the high frequency crystal oscillator circuit comprises a high frequency crystal oscillator C1, a resistor R3, a resistor R4; one end of the high-frequency crystal oscillator C1 is electrically connected with one end of the resistor R3 and the P11 port of the Bluetooth chip respectively, and the other end of the high-frequency crystal oscillator C1 is electrically connected with one end of the resistor R4 and the P12 port of the Bluetooth chip respectively; the other end of the resistor R3 and the other end of the resistor R4 are grounded.

3. The tamper-resistant alarm beacon bracelet circuit of claim 2, wherein the low frequency crystal oscillator circuit comprises a low frequency crystal oscillator C2, a resistor R1, a resistor R2; one end of the high-frequency crystal oscillator C2 is electrically connected with one end of the resistor R1 and the P61 port of the Bluetooth chip respectively, and the other end of the high-frequency crystal oscillator C2 is electrically connected with one end of the resistor R2 and the P62 port of the Bluetooth chip respectively; the other end of the resistor R1 and the other end of the resistor R2 are grounded.

4. The tamper-resistant alarm beacon bracelet circuit of claim 3, wherein one end of the radio frequency circuit is electrically connected with a port P3 of a Bluetooth chip, and the other end of the radio frequency circuit is further electrically connected with a Bluetooth antenna, and the Bluetooth antenna adopts an onboard PCB antenna.

5. The tamper-resistant alarm beacon bracelet circuit of claim 1, wherein the corresponding ends of the detection module are electrically connected with a P4 interface and a P5 interface corresponding to a Bluetooth chip, respectively.

6. The tamper-resistant alarm beacon bracelet circuit of claim 5, wherein the first TVS tube circuit comprises a first TVS tube T1, a P51 port of the first TVS tube T1 is electrically connected to a corresponding end of the detection module, and a P52 port of the first TVS tube T1 is electrically connected to one end of a copper wire.

7. The tamper-resistant alarm beacon bracelet circuit of claim 6, wherein the second TVS tube circuit comprises a second TVS tube T2 and a pull-up resistor R5, a P54 port of the second TVS tube T2 is electrically connected with a corresponding end of the detection module and one end of the pull-up resistor R5 respectively, and a P53 port of the second TVS tube T2 is correspondingly connected with the other end of the copper wire; the other end of the pull-up resistor R5 is electrically connected with a VCC end.

8. The tamper-resistant alarm beacon bracelet circuit of claim 5, wherein the voltage-reducing circuit is a DCDC voltage-reducing circuit, and a corresponding end of the DCDC voltage-reducing circuit is electrically connected with a P0 port of the Bluetooth chip.

9. The tamper-proof alarm beacon bracelet circuit of claim 8, wherein the SOS key circuit comprises an SOS key K1, and a corresponding end of the SOS key K1 is electrically connected with a P7 port of the Bluetooth chip.

10. The tamper-resistant alarm beacon bracelet circuit of claim 9, wherein the indicator light circuit comprises an LED indicator light, and a corresponding end of the LED indicator light is electrically connected with a P8 port of the bluetooth chip.