CN201387656Y - 3V powered wireless door magnetic sensor - Google Patents

Abstract

The utility model discloses a 3V power supply type wireless door magnetic sensor, which comprises a door magnetic strip trigger circuit containing a triode, a single-chip microcomputer control circuit containing a single-chip microcomputer, and a high-frequency transmitting circuit. A boost circuit is connected between the circuits, and the boost circuit includes a switching power supply IC, an inductor, a Schottky diode, and a field effect tube. The switching power supply IC is connected to the gate of the field effect tube, and the drain of the field effect tube Connect the collector of the triode, the source parallel inductance of the FET and the Schottky diode; the emitter of the triode of the gate magnetic strip trigger circuit is connected to a 3V power supply for power supply. The utility model adjusts the door magnetic structure, and the interior can be suitable for installing two 1.5V batteries, and the capacity of the two 1.5V batteries is above 600mA/h.

Description

3V operated type wireless door magnetic inductor

Technical field

The utility model relates to a kind of intelligent alarm end-gate magnetic induction device, particularly a kind of 3V operated type wireless door magnetic inductor.

Background technology

After the bar magnet trigger gate magnetic main body tongue tube work of motion, warning message is launched with high frequency transmission circuit.There are some inconvenient factors in this power supply mode to the user in use: 1) though 12V 23A stack or 12V27A stack battery volume are less, have only between the 50mA/h to 60mA/h but battery capacity is low, thereby cause serviceable life lower, if calculate for 30 times by triggering every day to use, battery has only about 1 ~ 2 month serviceable life; 2) 12V 23A stack or 12V 27A stack battery are because usable range is narrower, and it is difficult therefore to buy, and can only just can buy in above supermarket in large-and-medium size cities, buys quite difficulty in small and medium-sized cities; 3) 12V 23A stack or 12V 27A stack battery price are more expensive, and general unit price is about 5 ~ 6 yuan; For this reason, develop a kind of power supply convenience and lower-cost wireless door magnetic inductor and become research emphasis.

Summary of the invention

Goal of the invention: technical problem to be solved in the utility model is at the deficiencies in the prior art, and a kind of 3V operated type wireless door magnetic inductor is provided.

Technical scheme: the utility model discloses a kind of 3V operated type wireless door magnetic inductor, comprise the door magnetic magnetic stripe trigger circuit that contain triode, the single chip machine controlling circuit and the high frequency transmission circuit that contain single-chip microcomputer, be connected with booster circuit between described door magnetic magnetic stripe trigger circuit and the high frequency transmission circuit, described booster circuit comprises Switching Power Supply IC, inductance, schottky diode, field effect transistor, described Switching Power Supply IC is connected with the grid of field effect transistor, the drain electrode of field effect transistor connects inductance and schottky diode, the inductance other end connects the collector of described triode, the source ground of field effect transistor; The transistor emitter of described door magnetic magnetic stripe trigger circuit is connected power supply with the 3V power supply.

In the utility model, preferably, the single chip machine controlling circuit of described single-chip microcomputer also is connected with the battery low-voltage testing circuit; Described battery low-voltage testing circuit comprises second triode, the 3rd triode, the 5th triode and light emitting diode; The base stage of described second triode connects the 3V power supply, and the collector of second triode is connected with the base stage of the 3rd triode, and the collector of the 3rd triode is connected with the base stage of the 5th triode, and the collector of the 5th triode is connected with single-chip microcomputer and light emitting diode.

In the utility model, preferably, described 3V power supply is the battery of the 1.5V of two joint series connection.

Beneficial effect: 3V operated type wireless door magnetic inductor described in the utility model has overcome above-mentioned shortcoming with 12V stack battery, and the opposite house magnetic structure is adjusted, and inside can be fit to install 2 joint 1.5V batteries, and the capacity of 2 joint 1.5V batteries is more than 600mA/h.On circuit, increased the operating voltage that booster circuit is increased to voltage in circuit such as satisfying high-frequency emission, single-chip microcomputer, make that serviceable life, average energy reached time a year and a half, it is short serviceable life to overcome original magnetic, reduced the frequency of door magnetic replacing battery, solved battery and on market, buy difficult problem.Increase a low power detection circuit simultaneously, when door magnetoelectricity quantity not sufficient, self low pressure pilot lamp is lighted the reminding user to replace battery; Also battery low pressure information is sent to simultaneously that alarm terminal is reminded the user, this also is the function that current all magnetic do not possess.

Description of drawings

Below in conjunction with the drawings and specific embodiments the utility model is done further to specify, above-mentioned and/or otherwise advantage of the present utility model will become apparent.

Fig. 1 is for comprising the door magnetic inductor circuit theory diagrams of booster circuit in the utility model.

Fig. 2 a and Fig. 2 b are the circuit theory diagrams of the utility model mesolow testing circuit.

Fig. 3 implements structural representation for the utility model.

Embodiment:

As shown in Figure 1, the utility model discloses a kind of 3V operated type wireless door magnetic inductor, comprise the door magnetic magnetic stripe trigger circuit that contain triode Q4, the single chip machine controlling circuit and the high frequency transmission circuit that contain single-chip microcomputer U2, be connected with booster circuit between described door magnetic magnetic stripe trigger circuit and the high frequency transmission circuit, described booster circuit comprises Switching Power Supply IC U1, inductance L 1, schottky diode D1, field effect transistor Q6, described Switching Power Supply IC U1 is connected with the grid of field effect transistor Q6, the drain electrode of field effect transistor Q6 connects inductance L 1 and schottky diode D1, inductance L 1 other end connects the collector of described triode Q4, the source ground of field effect transistor Q6, when voltage add to field effect transistor Q6 when drain electrode simultaneously this voltage add to the 2 pin VDD of Switching Power Supply IC U1, the basic pulse voltage that Switching Power Supply IC produces a 100KHz exports the grid of field effect transistor Q6 to by 5 pin EXT, and field effect transistor work is boosted by inductance L 1; Be filtered into DC voltage by electrochemical capacitor C5 again by schottky diode D1 output booster voltage, regulate intrinsic standoff ratio, make by U1 control 100KHz width and be output as 12V by resistance R 13, R14 again, for radiating circuit and single chip circuit use.

The emitter of the triode Q4 of described door magnetic magnetic stripe trigger circuit is connected power supply with the 3V power supply.Door magnetic magnetic stripe trigger circuit are made up of triode Q1, triode Q4, resistance R 1, resistance R 2, resistance R 3, resistance R 6, capacitor C 1, capacitor C 12, LED 1 and tongue tube SW-PB, tongue tube is in normally open, under the effect of door magnetic magnetic stripe, the tongue tube closure, if at this moment door magnetic magnetic stripe leaves tongue tube, tongue tube is in off-state, at this moment+the 3V power supply gives capacitor C 1 charging by resistance R 1, triode Q1, Q4 conducting work, LED 1 relay indicating light is lighted, and provides electric current to booster circuit simultaneously.

Single chip part is independently finished by single-chip microcomputer U2, the burned in advance self-compiling program of this single-chip microcomputer, and when 1 pin of single-chip microcomputer U2 had the voltage input, the 3 pin output encoder pulses of single-chip microcomputer U2 added to triode Q7 base stage, and triode Q7 works at this moment.

High frequency transmission circuit is made up of capacitor C 4, resistance R 13, resistance R 14, capacitor C 5, inductance L 2, capacitor C 2, triode Q7, triode Q8, quartz crystal oscillator X1, resistance R 4, resistance R 7 and radio-frequency antenna RF, and resistance R 7 is drawn radio frequency output and is connected with U2.Hold when single-chip microcomputer 3 pin RF-OUT export triode Q7 base stage RF-OUT to, triode Q7, Q8 work simultaneously, and triode Q8 and quartz crystal X1 constitute the oscillation circuit generation higher-order of oscillation and launched by antenna.Capacitor C 1 charging finishes the LED1 lamp and extinguishes, and high-frequency emission finishes.

Shown in Fig. 2 a and Fig. 2 b, door magnetic inductor described in the utility model also comprises the battery low-voltage testing circuit, and described battery low-voltage testing circuit comprises the second triode Q2, the 3rd triode Q3, the 5th triode Q5 and LED 2; Base stage series and parallel resistance R 8 and the resistance R 16 of the described second triode Q2, resistance R 8 is connected with the 3V power supply, resistance R 16 ground connection; The collector of the second triode Q2 is connected with the base stage of the 3rd triode Q3, and the base stage of the 3rd triode Q3 is connected with the 3V power supply by resistance R 9; Base stage with the 5th triode Q5 behind the collector series resistance R10 of the 3rd triode Q3 is connected, and is connected with the 3V power supply after drawing resistance in series R15 between the base stage of resistance R 10 and the 5th triode Q5.The collector of the 5th triode Q5 is connected with Switching Power Supply IC U2 and LED 2.The 5th triode Q5 draws to be communicated with U2 and carries out the low pressure check point, series resistor R11 between described check point and the diode (LED) 2.

Door magnetic magnetic stripe triggers principle of work: when magnet left tongue tube, tongue tube open circuit, 3V power supply made triode Q1, Q4 conducting for capacitor C 1 charging by resistance R 1, and this moment, LED 1 relay indicating light was lighted, and expression door magnetic is started working.Voltage is added on the VDD of U1, provides operating voltage that the information that door magnetic leaves is launched for triode Q7, the Q8 of chip U2 and high frequency transmission circuit after the EXT of U1 end output high-frequency impulse control field effect transistor Q6 work is boosted by inductance L 1.This end-of-job when capacitor C 1 charging finishes, triode Q1, Q4 quit work, and this moment, LED 2 relay indicating lights extinguished (expression door magnetic quits work).

Low pressure testing principle: when cell voltage is lower than 1.9V, triode Q2 did not work when divider resistance R16 both end voltage was lower than 0.7V, triode Q3, Q5 work, LED 2 pilot lamp are lighted the reminding user to replace battery simultaneously, when door magnetic triggers, when the low pressure test side of U2 was noble potential, U2 thought that battery low pressure sends to terminal to this information by high-frequency mode again and comes the reminding user to replace battery.

As shown in Figure 3, in the utility model, during concrete enforcement, comprising chassis body 1, main body, to be provided with battery low pressure pilot lamp 2 be that LED 2, high-frequency emission pilot lamp 3 are LED 1, tongue tube induction region 4,3V battery installation region 5, and the parts that are mated are bar magnet 7 and magnetic receiver 6.

The utility model provides a kind of thinking and method of 3V operated type high frequency door magnetic inductor; the method and the approach of this technical scheme of specific implementation are a lot; the above only is a preferred implementation of the present utility model; should be understood that; for those skilled in the art; under the prerequisite that does not break away from the utility model principle, can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.The all available prior art of each component part not clear and definite in the present embodiment is realized.

Claims (3)

1, a kind of 3V power supply type wireless door sensor, comprise the door magnetic strip trigger circuit that contains triode (Q4), the single-chip microcomputer control circuit that contains single-chip microcomputer (U2) and high-frequency transmitting circuit, it is characterized in that, described door magnetic A boost circuit is connected between the strip trigger circuit and the high-frequency transmitting circuit, and the boost circuit includes a switching power supply IC (U1), an inductor (L1), a Schottky diode (D1), and a field effect transistor (Q6). The switching power supply IC (U1) is connected to the gate of the field effect transistor (Q6), the drain of the field effect transistor (Q6) is connected to the inductor (L1) and the Schottky diode (D1), and the other end of the inductor (L1) The collector of the triode (Q4) is connected, and the source of the field effect transistor (Q6) is grounded; the emitter of the triode (Q4) of the door magnetic strip trigger circuit is connected to a 3V power supply for power supply. 2. The 3V power supply type wireless magnetic door sensor according to claim 1, characterized in that, the single-chip microcomputer control circuit of the single-chip microcomputer (U2) is also connected with the battery low-voltage detection circuit; the battery low-voltage detection circuit includes a second three-pole tube (Q2), third triode (Q3), fifth triode (Q5), and light-emitting diode (LED2); the base of the second triode (Q2) is connected to a 3V power supply, and the second, third The collector of the transistor (Q2) is connected to the base of the third transistor (Q3), and the collector of the third transistor (Q3) is connected to the base of the fifth transistor (Q5). The collector of the pole tube (Q5) is connected with the microcontroller (U2) and the light emitting diode (LED2). 3. The 3V-powered wireless magnetic door sensor according to claim 1 or 2, wherein the 3V power supply is two 1.5V batteries connected in series.

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