Anti-lost device circuit
By simplifying the anti-lost device circuit structure, using the CY8018 chip and the signal enhancement unit of the Bluetooth antenna, and combining battery detection and sensor wake-up mechanisms, the problems of high cost and high power consumption of the anti-lost device circuit are solved, and a low-cost, low-power anti-lost device product is realized, which is suitable for a variety of scenarios.
Patent Information
- Application Number
- CN202422751963.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-12
- Publication Date
- 2025-10-10
- Estimated Expiration
- 2034-11-12
AI Technical Summary
The existing anti-lost device circuit has high cost and high power consumption, which limits its application scope.
The circuit structure consists of a main control module, button, buzzer module, sensor module and power module. The main control module integrates a communication module and communicates with the search device through a Bluetooth antenna. The main control chip uses CY8018. The communication antenna cooperates with the filtering unit and signal enhancement unit to reduce computing requirements. The sensor module activates the main control module to broadcast information when it detects movement, and the battery detection unit monitors the battery voltage in real time.
It reduces circuit cost and power consumption, realizes low-cost, low-power anti-loss device products, and extends battery life. It is suitable for preventing the loss of valuables such as mobile phones, wallets, keys, luggage, and for locating children, pets and vehicles.
Smart Images
Figure CN223427158U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to circuit structure field, concretely relates to a kind of anti-lost device circuits. BACKGROUND
[0002] Anti-lost device application scene is extensive, such as can be applicable to the anti-lost of mobile phone, wallet, key, luggage and other valuables, also can be used to prevent children from getting lost, pet lost and vehicle positioning etc., the circuit of existing anti-lost device is complex, the requirement of chip is relatively higher, needs to have certain computing power, when needing to obtain position information, chip calculates position information according to the information collected, and reports to host computer, therefore, the anti-lost device circuit of prior art is high in cost, high in power consumption, and high cost has restricted the application range of product. UTILIT Y MODEL CONTENT
[0003] To solve the problems in the prior art, the utility model provides an anti-lost device circuit.
[0004] The anti-lost device circuit of the utility model is composed of main control module, key, buzzer module, sensor module and power module, wherein the output end of the key and the output end of the sensor module are connected with the input end of the main control module respectively, the input end of the buzzer module is connected with the output end of the main control module, the power module is used to power the whole circuit, the main control module integrates communication module, is equipped with communication antenna for communicating with finding device, and is used to broadcast information to finding device.
[0005] Further, the main control module includes main control chip, crystal oscillator and filter unit, the main control chip uses CY8018 chip, the communication antenna is Bluetooth antenna, the pin 2 and pin 3 of the main control chip are connected with crystal oscillator, and the filter unit is arranged at the power supply pin of the main control chip and the communication pin connected with communication antenna.
[0006] Further, the filter unit of the power supply pin of the main control chip uses filter capacitor, and the filter unit on the communication pin of the main control chip uses π-type filter.
[0007] Further, signal enhancement unit is further arranged between the communication antenna and the filter unit.
[0008] Further, the signal enhancement unit includes resistance R9 and inductance ANT1, wherein the inductance ANT1 is connected in series on communication line, one end of the resistance R9 is arranged between the communication antenna and inductance ANT1, and the other end of the resistance R9 is grounded.
[0009] Furthermore, a voltage stabilizing unit is provided between the power supply end of the main control module and the battery. The voltage stabilizing unit includes a linear voltage regulator P1, a capacitor C10 and a capacitor C12. The capacitor C10 and the capacitor C12 are connected in parallel, one end of which is connected between the power input end of the linear voltage regulator P1 and the battery, and the other end is grounded. The power output end of the linear voltage regulator P1 is connected to the power supply end of the main control module.
[0010] Furthermore, the sensor module adopts a displacement sensor, and the displacement sensor is connected to pins 8 and 9 of the main control chip.
[0011] Furthermore, the buzzer module includes a driver chip connected to the pins 15 and 21 - 22 of the main control chip and a buzzer arranged at the output end of the driver chip.
[0012] Furthermore, the main control module is further provided with a battery detection unit, the input end of the battery detection unit is connected to the output end of the battery, and the output end of the battery detection unit is connected to the detection pin 21 of the main control chip.
[0013] Furthermore, the battery detection unit includes a first resistor, a second resistor and a first capacitor, the first resistor and the second resistor are connected in series, one end is connected to the power supply end of the battery, and the other end is grounded, one end of the first capacitor is grounded, and the other end of the first capacitor is connected to the detection pin of the main control chip between the first resistor and the second resistor.
[0014] Compared with the existing technology, the beneficial effects of the present invention are as follows: the present invention broadcasts information to the host computer, similar to a Bluetooth beacon, calculates the location information through the host computer, and uploads it to the server, but does not store the information and calculate the location itself. Therefore, the requirements for the main control module are very low, the circuit is simple, and the circuit cost can be effectively reduced;
[0015] During normal use, when the sensor receives movement information, it activates the dormant main control module to broadcast the information, thereby effectively reducing product power consumption. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] In order to more clearly illustrate the solutions in the present invention or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.
[0017] Figure 1 This is the structural diagram of the utility model;
[0018] Figure 2 This is a schematic diagram of the main control module circuit according to an embodiment of the present utility model;
[0019] Figure 3 This is a circuit schematic diagram of a sensor module embodiment 1;
[0020] Figure 4 This is a circuit schematic diagram of the second embodiment of the sensor module;
[0021] Figure 5 This is the circuit schematic diagram of the battery detection unit;
[0022] Figure 6 This is the circuit schematic diagram of the buzzer module. DETAILED DESCRIPTION
[0023] Unless otherwise defined, all technical and scientific terms used in this utility model have the same meanings as commonly understood by those skilled in the art to which this utility model belongs. The terms used in the specification of this utility model are only for the purpose of describing specific embodiments and are not intended to limit this utility model. The terms "including" and "having" and any variations thereof in the specification and claims of this utility model and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first" and "second" in the specification and claims of this utility model or the above-mentioned drawings are used to distinguish different objects, not to describe a specific order.
[0024] References to "embodiments" in this disclosure mean that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the disclosure. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it necessarily refer to mutually exclusive, independent, or alternative embodiments to other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described in this disclosure may be combined with other embodiments.
[0025] In order to enable those skilled in the art to better understand the solution of the present invention, the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the accompanying drawings.
[0026] Find My is an application technology released by Apple. Peripheral products that support this technology can use the Apple devices around them (iPhone, iPad, AirPods, AirTag, etc.) to help locate themselves, even if they do not have a GPS module.
[0027] On this basis, the utility model provides an anti-lost device circuit, which is applied to the Find My anti-lost device product and is combined with Apple devices to locate the anti-lost device. The utility model has a simple circuit structure, can effectively reduce the cost of the product, and is conducive to the popularization of the application of anti-lost device products.
[0028] like Figure 1As shown, the anti-lost device circuit of the present invention consists of a main control module, a button, a buzzer module, a sensor module and a power module, wherein the output end of the button and the output end of the sensor module are respectively connected to the input end of the main control module, the input end of the buzzer module is connected to the output end of the main control module, the power module supplies power to the entire circuit, and the main control module integrates a communication module and is provided with a communication antenna for communicating with a search device, which is used to broadcast information to the search device.
[0029] like Figure 2 and Figure 5 As shown, the main control module of this example includes a main control chip U1, a crystal oscillator X1 and a filtering unit. The main control chip adopts the CY8018 chip, and the communication antenna is a Bluetooth antenna. The antenna is connected to the pads TP9 and TP10 led out through pin 6 of the main control chip U1. Pins 2 and 3 of the main control chip U1 are connected to the crystal oscillator X1. The filtering unit is arranged at the power supply pin of the main control chip and the communication pin connected to the communication antenna.
[0030] In this example, pin 18 of the main control chip U1 is connected to the 3.3V power supply and battery respectively, pins 19 and 20 output DCDC power supply, pins 8-9 are connected to the sensor module, pin 21 is connected to the battery detection unit, pins 10-12 are connected to the debug port, pin 16 is connected to the switch button J1, and pins 15, 21-22 are connected to the buzzer module.
[0031] Furthermore, the filtering unit of the power supply pin of the main control chip U1 adopts a filtering capacitor, and the filtering unit on the communication pin of the main control chip U1 adopts a π-type filter, including an inductor L2, a capacitor C7, and a capacitor C8. The inductor is connected in series to pin 6 of the main control chip U1, and one end of the capacitor C7 and the capacitor C8 are grounded, and the other ends are respectively arranged at both ends of the inductor L2.
[0032] Preferably, this embodiment further includes a signal enhancement unit between the communication antenna and the filtering unit. The signal enhancement unit includes a resistor R9 and an inductor ANT1. The inductor ANT1 is connected in series to the communication line, one end of the resistor R9 is disposed between the communication antenna and the inductor ANT1, and the other end of the resistor R9 is grounded. The antenna signal is modulated and matched by the resistor R9 and the inductor ANT1, thereby improving the quality of the received signal of the present invention.
[0033] In this example, a voltage stabilizing unit is further provided between the power supply end of the main control chip U1 and the battery pin BAT. The voltage stabilizing unit includes a linear voltage regulator P1, a capacitor C10, and a capacitor C12. The capacitors C10 and C12 are connected in parallel, with one end connected between the power input end of the linear voltage regulator P1 and the battery, and the other end connected to the ground. The power output end of the linear voltage regulator P1 is connected to the filtering unit, thereby providing a stable power supply for the entire circuit.
[0034] Preferably, the main control chip in this example can also adopt a UWB positioning chip, which can directly send positioning information to the APP of the host computer.
[0035] like Figure 5 As shown, the battery detection unit of this example includes a first resistor R1, a second resistor R2 and a first capacitor C9. The first resistor R1 and the second resistor R2 are connected in series, one end of which is connected to the power supply end of the battery and the other end is grounded. One end of the first capacitor C9 is grounded, and the other end of the first capacitor C9 is connected to the detection pin of the main control chip U1 between the first resistor R1 and the second resistor R2.
[0036] like Figure 3 As shown, as an embodiment of the present invention, the sensor module of this example includes a displacement sensor U2, a resistor R5, a resistor R4 and a capacitor C14. Pin A2 and pin B2 of the displacement sensor U2 are respectively connected to pin 8 and pin 9 of the main control chip U1. The main control chip of this example can communicate with the search device APP, sleep in a normal state, and is in a slow broadcast state. It wakes up and broadcasts data information once every first time period. If the displacement sensor U2 detects movement, it sends displacement information to the main control chip U1. The main control chip U1 is activated, adjusts the speed of external broadcasting, enters a fast broadcast state, and broadcasts data information once every second time period. The first time period can be one hour, the second time period can be 3 minutes, etc., and can also be set to other values according to needs. The time counting is achieved through the crystal oscillator X1. If you need to find a product, you can also wake up the main control chip U1 by communicating with the host computer.
[0037] like Figure 4 As shown, as another embodiment of the present invention, other displacement sensor chips such as MSA3S01 can also be purchased in this example to meet positioning requirements of different accuracies or different needs.
[0038] like Figure 6 As shown, the buzzer module in this example includes a buzzer driver DC009 and a buzzer driven by the buzzer driver DC009. Pins 1 and 2 of the buzzer driver DC009 are connected to pins 21 and 22 of the main control chip U1, respectively. The high and low levels of the two pins control the amplification of the buzzer sound. Pin 3 of the buzzer driver DC009 is connected to pin 15 of the main control chip U1 for setting the buzzer drive mode. Pins 6 and 7 of the buzzer driver DC009 are connected to the buzzer, respectively.
[0039] This example works as follows:
[0040] Before use, the circuit is debugged through the pads connected with external debugging device, after debugging, the main control chip U1 broadcasts information according to setting to find device, the find device calculates position information and track according to the displacement information reported by the main control chip, so that the article installed with the circuit can be conveniently found.When in pairing timeout, it automatically enters sleep state, the main control chip can be re-awakened through communication with the upper computer, then enters pairing state and realizes anti-lost finding, thereby effectively reducing power consumption.
[0041] The battery detection unit detects the battery voltage in real time, the power supply voltage in the example is 3.7V, when the battery voltage is less than 2.7V, the circuit does not work, and the user is reminded through the buzzer to place the battery voltage too low and to protect the battery. The circuit in the example is simple and only consists of three small chips and multiple resistance and capacitance devices, and the power consumption is very low, which can support use for 4-5 years, thereby facilitating the user and effectively reducing product cost and use cost.
[0042] The above specific embodiments are preferred embodiments of the utility model, and the utility model is not limited by the specific embodiments, and the scope of the utility model includes but is not limited to the specific embodiments, and equivalent changes made according to the utility model are within the protection scope of the utility model.
Claims
1. An anti-lost device circuit, characterized in that: The anti-lost device circuit consists of a main control module, a button, a buzzer module, a sensor module and a power module. The output end of the button and the output end of the sensor module are respectively connected to the input end of the main control module, the input end of the buzzer module is connected to the output end of the main control module, and the power module supplies power to the entire circuit. The main control module integrates a communication module and is provided with a communication antenna for communicating with the search device, which is used to broadcast information to the search device.
2. The anti-loss device circuit according to claim 1, characterized in that: The main control module includes a main control chip, a crystal oscillator and a filtering unit. The main control chip adopts the CY8018 chip, the communication antenna is a Bluetooth antenna, pins 2 and 3 of the main control chip are connected to the crystal oscillator, and the filtering unit is set at the power supply pin of the main control chip and the communication pin connected to the communication antenna.
3. The anti-loss device circuit according to claim 2, characterized in that: The filtering unit of the power supply pin of the main control chip adopts a filtering capacitor, and the filtering unit on the communication pin of the main control chip adopts a π-type filter.
4. The anti-loss device circuit according to claim 2, characterized in that: A signal enhancement unit is further provided between the communication antenna and the filtering unit.
5. The anti-lost device circuit according to claim 4, characterized in that: The signal enhancement unit includes a resistor R9 and an inductor ANT1, wherein the inductor ANT1 is connected in series to the communication line, one end of the resistor R9 is arranged between the communication antenna and the inductor ANT1, and the other end of the resistor R9 is grounded.
6. The anti-lost device circuit according to claim 2, characterized in that: A voltage stabilizing unit is further provided between the power supply end of the main control module and the battery. The voltage stabilizing unit includes a linear voltage regulator P1, a capacitor C10, and a capacitor C12. The capacitors C10 and C12 are connected in parallel, with one end connected between the power input end of the linear voltage regulator P1 and the battery, and the other end connected to the ground. The power output end of the linear voltage regulator P1 is connected to the power supply end of the main control module.
7. The anti-loss device circuit according to claim 2, characterized in that: The sensor module adopts a displacement sensor, and the displacement sensor is connected to pins 8 and 9 of the main control chip.
8. The anti-loss device circuit according to claim 2, characterized in that: The buzzer module includes a driver chip connected to the pins 15 and 21-22 of the main control chip and a buzzer arranged at the output end of the driver chip.
9. The anti-loss device circuit according to any one of claims 2 to 8, characterized in that: The main control module is further provided with a battery detection unit, the input end of the battery detection unit is connected to the output end of the battery, and the output end of the battery detection unit is connected to the detection pin 21 of the main control chip.
10. The anti-loss device circuit according to claim 9, characterized in that: The battery detection unit includes a first resistor, a second resistor and a first capacitor. The first resistor and the second resistor are connected in series, one end of which is connected to the power supply end of the battery and the other end is grounded. One end of the first capacitor is grounded, and the other end of the first capacitor is connected to the detection pin of the main control chip between the first resistor and the second resistor.