CN210166890U - Single wireless door and window alarm device - Google Patents
Single wireless door and window alarm device Download PDFInfo
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- CN210166890U CN210166890U CN201921338409.9U CN201921338409U CN210166890U CN 210166890 U CN210166890 U CN 210166890U CN 201921338409 U CN201921338409 U CN 201921338409U CN 210166890 U CN210166890 U CN 210166890U
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Abstract
The utility model provides a wireless door and window alarm device of monomer, including singlechip, acceleration sensor and host computer, the singlechip is connected with the acceleration sensor electricity, singlechip and host computer wireless connection. The acceleration sensor comprises a sensor chip including a VSPin and VDDPin, VDDThe pin is connected with a triode VDDThe pin is connected with the emitting electrode of the triode at VDDA first capacitor is connected between the pin and the emitter of the triode. The V isSThe pins are also connected to the emitter of the transistor, VSThe pin is also connected withA second capacitor and a third capacitor, the second capacitor and the third capacitor being connected in parallel and to ground. The device detects the motion state of door and window through acceleration sensor in real time, detects that door and window is in the motion state after, and the singlechip is through handling acceleration sensor's data, judges the on-off state of door and window to can send the warning through the alarm. The utility model has the characteristics of detect accurate, low-power consumption.
Description
Technical Field
The utility model relates to a door and window warning field, concretely relates to wireless door and window alarm device of monomer.
Background
The traditional door and window alarm is designed in a double-body mode, the alarm is composed of a permanent magnet and an alarm main body, a normally open reed switch is arranged in the alarm, when the permanent magnet and the reed switch are close to each other, namely when a door and a window are closed, the reed switch is attracted under the action of a magnetic field of the permanent magnet, and the alarm is in a standby dormant state. When the permanent magnet and the reed switch are far away from each other, namely when the door and the window are opened, the reed switch is disconnected, the alarm circuit is triggered, and a corresponding alarm signal is sent out. The traditional door and window alarm needs to install an alarm main body and a permanent magnet on a door and window body and a door and window frame respectively, has the defects of inconvenient installation, easy false alarm, unattractive appearance and the like, and influences the user experience and the alarm quality.
SUMMERY OF THE UTILITY MODEL
The installation that exists to current door and window alarm is inconvenient, the alert scheduling problem of easy wrong report, the utility model provides a wireless door and window alarm device of monomer.
The utility model adopts the following technical proposal:
a single wireless door and window alarm device comprises a single chip microcomputer, an acceleration sensor and an upper computer, wherein the single chip microcomputer is electrically connected with the acceleration sensor and wirelessly connected with the upper computer;
the acceleration sensor comprises a sensor chip which comprises a VSPin and VDDPin, VDDThe pin is connected with a triode, specifically VDDThe pin is connected with the emitting electrode of the triode at VDDA first capacitor is connected between the pin and the emitter of the triode; the V isSThe pins are also connected to the emitter of the transistor, VSThe pin is also connected with a second capacitor and a third capacitor, and the second capacitor and the third capacitor are connected in parallel and grounded;
the single chip microcomputer is connected with the base of the triode and is also connected with an alarm, and the alarm is a light emitting diode.
Preferably, the singlechip is also connected with loRa wireless communication chip, and the singlechip passes through loRa wireless communication chip and host computer wireless connection.
Preferably, the single chip microcomputer is connected with a power supply, and the power supply is a CR2450 type DC3V button cell.
Preferably, the type of the single chip microcomputer is MSP 430.
Preferably, the model number of the sensor chip is ADXL 362.
Preferably, the LoRa wireless communication chip is model number CW1278 SL-470.
Preferably, the light emitting diode is capable of emitting red light.
Preferably, the base electrode of the triode is connected with a base electrode resistor, and the emitter electrode of the triode is connected with an emitter electrode resistor; the first capacitor is grounded.
The utility model has the advantages that:
the utility model provides a wireless door and window alarm device of monomer, through acceleration sensor real-time detection door and window's motion state, detect door and window and be in the motion state after, the singlechip is handled through the data to acceleration sensor, judges door and window's on-off state to can send the warning through the alarm, send alarm information for the host computer through crossing loRa wireless communication mode, the host computer can send alarm information to user's cell-phone. The utility model has the characteristics of detect accurate, low-power consumption, the appearance is monomer formula, has characteristics such as simple to operate, novel pleasing to the eye.
Drawings
Fig. 1 is a circuit diagram of the single chip microcomputer control provided by the utility model.
Fig. 2 is a circuit diagram of an acceleration sensor control circuit.
Fig. 3 is a circuit diagram of the LoRa wireless communication circuit.
Detailed Description
The utility model is described in detail with the following figures:
referring to fig. 1 to 3, the single wireless door and window alarm device comprises a single chip microcomputer, an acceleration sensor and an upper computer, wherein the single chip microcomputer is electrically connected with the acceleration sensor and wirelessly connected with the upper computer.
As shown in figure 1, the single-chip microcomputer D1 is connected with a power supply G1, and the power supply G1 selects a CR2450 type DC3V button battery according to the structural size and the endurance time. Power filter capacitors C3 and C8, current limiting resistors R1, R6, R7, R10 and R1, light emitting diodes V1, V2 and V3, a key S1, a pull-up resistor R4 and a reset capacitor C4.
In consideration of cost control, the single chip microcomputer D1 of the present embodiment uses an MSP430 single chip microcomputer, and in specific implementation, the single chip microcomputer D1 can be replaced by other control chips, including other types of single chip microcomputers, CPLDs, DSPs, and the like. The LEDs V1, V2 and V3 are respectively selected from red, yellow and green.
The key S1 in fig. 1 has a multiplexing function, and the single chip microcomputer can realize different functions according to the length of the key time. Specifically, after the key S1 is pressed, the single chip microcomputer D1 starts an internal timer, records the time when the key is pressed, and after the key S1 is lifted, the single chip microcomputer D1 closes the timer, and the single chip microcomputer executes different actions according to the recorded time: when the key pressing time is less than 3 seconds, the system self-checks, and the yellow light flickers for 3 times; the key pressing time is 3-5 seconds, the green light is flickered, and a network access instruction is sent to the communication module D3; and when the key pressing time exceeds 5 seconds, the system is restarted.
The red light is an alarm, and the red light is used for lighting when the single chip microcomputer detects that the door and the window are opened.
As shown in fig. 2, the acceleration sensor includes a sensor chip D2 including VSPin and VDDPin, VDDThe pin is connected with an NPN type triode V4, specifically VDDThe pin is connected with the emitter of a triode V4 at VDDA first capacitor C7 is connected between the pin and the emitter of the triode V4, and the first capacitor is grounded.
The V isSThe pin is also connected with the emitter of a triode V4SThe pin is also connected to a second capacitor C5 and a third capacitor C6, which are connected in parallel and to ground.
The base electrode of the triode is connected with a base electrode resistor R14, and the emitter electrode of the triode is connected with an emitter electrode resistor R15.
C5 is tantalum capacitor C5, and C6 and C7 are ceramic capacitors.
The acceleration sensor D2 selected in the embodiment is ADXL362, has the functions of low power consumption, triaxial acceleration acquisition, 12-bit output resolution and the like, and can avoid undersampling and aliasing due to the characteristic of continuous sampling of full-bandwidth data.
According to the operating characteristics of the acceleration sensor, the power supply (V) is turned off or the operating voltage drops below the rated rangeS、 VDDAnd any bypass capacitance) must be fully discharged before reapplication can occur. In particular, after removing battery G1, the sensor external bypass capacitance and internal parasitic capacitance will remain charged for a period of about ten seconds, during which time the battery is reinstalled, resulting in sensor failure due to incomplete discharge. Therefore, the present embodiment uses the sensor power supply VSAnd VDDAn NPN type triode V4 is added at the front end, and the connection or disconnection of the NPN type triode V4 is controlled by a P2.2 port of the single chip microcomputer, so that the connection and disconnection of the power supply of the acceleration sensor D2 can meet the design requirements.
The singlechip is also connected with loRa wireless communication chip, and the singlechip passes through loRa wireless communication chip and host computer wireless connection.
Referring to fig. 3, a LoRa wireless communication circuit diagram is shown. As shown in fig. 3, the wireless communication device includes a LoRa wireless communication chip D3, a matching antenna W1, peripheral circuits L1, C1, C2, and a storage capacitor C11. The LoRa wireless communication chip D3 adopts a CW1278SL-470 chip, the visible communication distance is 1km, the communication frequency is 470MHz, the bandwidth is 7.8-500 kHz, and the LoRa wireless communication chip has the characteristics of adjustable frequency band, low power consumption, high sensitivity, blocking resistance and the like. The matched radio frequency RF antenna circuit adopts an inductor L1 and capacitors C1 and C2 to form a pi-shaped filter circuit, and harmonic interference is eliminated. In this embodiment, the energy storage circuit adopts a farad capacitor C11 to connect in parallel to the communication module D3 power end, compensates the voltage drop that the heavy current in the twinkling of an eye that appears in the communication process leads to, ensures that the communication module supplies power stably.
Of course, the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and the changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present invention should also belong to the protection scope of the present invention.
Claims (8)
1. A single wireless door and window alarm device is characterized by comprising a single chip microcomputer, an acceleration sensor and an upper computer, wherein the single chip microcomputer is electrically connected with the acceleration sensor and wirelessly connected with the upper computer;
the acceleration sensor comprises a sensor chip which comprises a VSPin and VDDPin, VDDThe pin is connected with a triode, specifically VDDThe pin is connected with the emitting electrode of the triode at VDDA first capacitor is connected between the pin and the emitter of the triode; the V isSThe pins are also connected to the emitter of the transistor, VSThe pin is also connected with a second capacitor and a third capacitor, and the second capacitor and the third capacitor are connected in parallel and grounded;
the single chip microcomputer is connected with the base of the triode and is also connected with an alarm, and the alarm is a light emitting diode.
2. The single wireless door and window alarm device of claim 1, wherein the single chip microcomputer is further connected with a LoRa wireless communication chip, and the single chip microcomputer is wirelessly connected with an upper computer through the LoRa wireless communication chip.
3. The single wireless door and window alarm device of claim 1, wherein the single chip microcomputer is connected with a power supply, and the power supply is a CR2450 type DC3V button cell.
4. The wireless door and window alarm device as claimed in claim 1, wherein the single chip microcomputer is of a model of MSP 430.
5. The wireless door and window alarm device as claimed in claim 1, wherein the type of the sensor chip is ADXL 362.
6. The wireless door and window alarm device of claim 2, wherein the model of the LoRa wireless communication chip is CW1278 SL-470.
7. The wireless door and window alarm device as claimed in claim 1, wherein the light emitting diode emits red light.
8. The wireless door and window alarm device with single body as claimed in claim 1, wherein the base electrode of the triode is connected with a base resistor, and the emitter electrode of the triode is connected with an emitter resistor; the first capacitor is grounded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921338409.9U CN210166890U (en) | 2019-08-19 | 2019-08-19 | Single wireless door and window alarm device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921338409.9U CN210166890U (en) | 2019-08-19 | 2019-08-19 | Single wireless door and window alarm device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210166890U true CN210166890U (en) | 2020-03-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921338409.9U Active CN210166890U (en) | 2019-08-19 | 2019-08-19 | Single wireless door and window alarm device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210166890U (en) |
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2019
- 2019-08-19 CN CN201921338409.9U patent/CN210166890U/en active Active
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