CN209044817U - Multifunctional electric fire-disaster monitoring device based on Internet of Things - Google Patents
Multifunctional electric fire-disaster monitoring device based on Internet of Things Download PDFInfo
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- CN209044817U CN209044817U CN201822201568.6U CN201822201568U CN209044817U CN 209044817 U CN209044817 U CN 209044817U CN 201822201568 U CN201822201568 U CN 201822201568U CN 209044817 U CN209044817 U CN 209044817U
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Abstract
The utility model discloses a kind of multifunctional electric fire-disaster monitoring device based on Internet of Things, eight Strong MCU U1 including model STC12C5A60S2, the crystal oscillating circuit being connect with single-chip microcontroller U1, program burn writing circuit, modulus conversion chip U2, radio communication circuit, lithium battery and DC power-supply circuit；The output of the DC power-supply circuit is connect with lithium battery, modulus conversion chip U2, program burn writing circuit and radio communication circuit respectively；The input of the modulus conversion chip U2 is connect with current transformer, residual current detector and hygrosensor respectively.Through the above scheme, the utility model has many advantages, such as that structure is simple, power supply is reliable, detection is comprehensive, has very high practical value and promotional value in electrical fire monitoring technical field.
Description
Technical field
The utility model relates to electrical fire monitoring technical fields, are based especially on the multifunctional electric fire prison of Internet of Things
Control device.
Background technique
Electric fire monitoring device, You Yitai main controller (SDFK) and several residual current formula fire alarm installations
(SDFA), buses isolator is formed by connecting through components such as dual bus.When the residual current formula fire alarm dress in protected circuit
When setting the earth-fault current of detection more than preset value, by analysis, confirm, sending sound, visual alarm and control signal, together
When earth-fault signal passed to main controller, main controller sending sound, visual alarm and control by bus within the several seconds
Signal processed, display screen display alarm address, records and saves alarm and control information.Traditional electrical fire main cause can be with
Be divided into: leakage fire, short circuit and fire hazard, overload fire, contact resistance cross conflagration, the bad fire of heat dissipation, Electrostatic Fire etc..
Currently, existing civilian electricity consumption is most to be only provided with earth leakage protective device, and not set electrical fire monitoring fills
It sets, which increases the security risks of civil safety electricity consumption.In addition, traditional electric fire monitoring device uses mains-supplied,
And if only if when electrical fire occurs, electric fire monitoring device is in power failure state after alternating current disappears, can not detection circuit
In residual circuit.In turn, so that electric fire monitoring device performs practically no function.It can be said that here it is the weights of frequent electrical fire
Want one of reason.
It is, therefore, desirable to provide a kind of multifunctional electric fire-disaster monitoring device based on Internet of Things, the real-time detection people, quotient, work
Industry electricity consumption guarantees that electric fault detection is more reliable.
Utility model content
In view of the above-mentioned problems, the purpose of this utility model is to provide a kind of, the multifunctional electric fire based on Internet of Things is supervised
Device is controlled, the technical solution adopted in the utility model is as follows:
Multifunctional electric fire-disaster monitoring device based on Internet of Things, eight including model STC12C5A60S2 enhanced
Single-chip microcontroller U1, the crystal oscillating circuit being connect with single-chip microcontroller U1, program burn writing circuit, modulus conversion chip U2, radio communication circuit,
Lithium battery and DC power-supply circuit；The output of the DC power-supply circuit is burnt with lithium battery, modulus conversion chip U2, program respectively
Write circuit is connected with radio communication circuit；The input of the modulus conversion chip U2 respectively with current transformer, voltage transformer
Residual current detector and hygrosensor wherein arbitrarily connect.
The radio communication circuit includes the wireless communication chips U3 of model nRF401, is connected to wireless communication chips U3
VCO1 pin and VCO2 pin between inductance L1, one end is connect and another with the PF_PWR pin of wireless communication chips U3
The resistance R2 of ground connection is held, one end is connect with the FILT1 pin of wireless communication chips U3 and the capacitor C6 of other end ground connection, series connection
The resistance R3 and capacitor C5 that one end is connect with the FILT1 pin of wireless communication chips U3 afterwards and the other end is grounded are connected to wireless
The ANT1 pin of capacitor C8 between the ANT1 pin and ANT2 pin of communication chip U3, one end and wireless communication chips U3 connect
Connect and the other end ground connection capacitor C7, one end connect with the ANT2 pin of wireless communication chips U3 and the other end be grounded capacitor
C9, one end is connected between capacitor C7 and capacitor C8 and the other end is connected to the inductance L2 between capacitor C8 and capacitor C9, series connection
One end is connected to the inductance L3 and capacitor C10 that between capacitor C7 and capacitor C8 and the other end is grounded afterwards, and one end is connected to after series connection
Between capacitor C8 and capacitor C9 and the other end ground connection inductance L4 and capacitor C11, be connected between capacitor C10 and capacitor C11
Antenna, the crystal oscillator Y2 and resistance R1 being connected to after in parallel between the XC1 pin of wireless communication chips U3 and XC2 pin, one end with
The XC1 pin of wireless communication chips U3 connects and the capacitor C3 of other end ground connection and one end are with wireless communication chips U3's
The capacitor C4 of the connection of XC2 pin and other end ground connection；VCC1 pin, VCC2 pin and the VCC3 of the wireless communication chips U3
Pin is connect with DC power-supply circuit.The PWR_UP pin of the wireless communication chips U3 and the serial port P2.4 of single-chip microcontroller U1
Connection；The TXEN pin of the wireless communication chips U3 is connect with the serial port P2.3 of single-chip microcontroller U1；The wireless communication chips
The CS pin of U3 is connect with the serial port P2.2 of single-chip microcontroller U1；The DIN pin of the wireless communication chips U3 is with single-chip microcontroller U1's
Serial port P2.1 connection；The DOUT pin of the wireless communication chips U3 is connect with the serial port P2.0 of single-chip microcontroller U1.
The DC power-supply circuit includes the transformer T1 being electrically connected with external city, the bridge that input terminal is connect with transformer T1
Formula rectifier D1, the DC converting circuit with the output connection of bridge rectifier D 1, and it is connected to bridge rectifier D 1 and straight
Flow the reverse voltage protection circuit between conversion circuit.
The reverse voltage protection circuit include series connection after be connected to bridge rectifier D 1 two output between resistance R4,
Diode D2 and resistance R5, one end are connected to the resistance R6 between resistance R4 and an output end of bridge rectifier D 1, and grid connects
It connects between diode D2 and resistance R5, the other end connection of source electrode and resistance R6 and drain another with bridge rectifier D 1
The N-channel field-effect tube Q1, the resistance R7 and grid that one end is connect with the source electrode of N-channel field-effect tube Q1 of output end connection
It is connect with the other end of resistance R7, drain the drain electrode connection with N-channel field-effect tube Q1 and the N-channel field-effect of source electrode ground connection
Pipe Q2；The anode of the diode D2 is connect with resistance R5 and cathode is connect with resistance R4.
Preferably, the DC converting circuit includes the resistance R8 that one end is connected between resistance R4 and resistance R6, grid
The N-channel field-effect tube Q3 connecting with the other end of resistance R8, one end are connect and another with the drain electrode of N-channel field-effect tube Q3
The resistance R9 of ground connection is held, one end is connected between resistance R4 and resistance R6 and the capacitor C17 of other end ground connection, anode and N-channel
The diode D3 of the source electrode connection of field-effect tube Q3, one end is connect with the cathode of diode D3 after parallel connection and the other end is connected to
Capacitor C18 and resistance R10 between capacitor C17 and resistance R8, the change with two primary coils one secondary coil, model EE18
Depressor T2, the diode D5 that anode is connect with an output end of the secondary coil of transformer T2, the secondary of anode and transformer T2
The diode D4 that another output end of coil connects and cathode is connect with the cathode of diode D5, the yin of one end and diode D5
The capacitor C19 of pole connection and other end ground connection, the diode D6 that anode is connect with the cathode of diode D5, one end and diode
The resistance 11 of the anode connection of D6, base stage connect with the other end of resistance R11, the cathode of collector and diode D5 connect and
The triode Q4 and grid of the anode connection of emitter and lithium battery connect with the anode of diode D6, drains and lithium battery
Anode connection and the P-channel field-effect transistor (PEFT) pipe Q5 that is connect with the cathode of diode D6 of source electrode；The secondary coil of the transformer T2
Centre tap ground connection；One end of the first primary coil of the transformer T2 connect with the grid of N-channel field-effect tube Q3 and
Other end ground connection；One end of the second primary coil of the transformer T2 is connected between resistance R8 and capacitor C17 and the other end
It is connect with the source electrode of N-channel field-effect tube Q3；The power supply of the power input VCC and modulus conversion chip U2 of the single-chip microcontroller are defeated
Enter to hold Vcc to connect with the cathode of diode D6；VCC1 pin, VCC2 pin and the VCC3 pin of the wireless communication chips U3
It is connect with the cathode of diode D6.
Further, described program programming circuit includes that VCC pin is connect and model with the cathode of diode D6
The program burn writing chip U4 of MAX232, the capacitor C12 being connected between the VCC pin and GND pin of program burn writing chip U4, even
The capacitor C13 between the VCC pin and V+ pin of program burn writing chip U4 is met, the C1+ for being connected to program burn writing chip U4 draws
Capacitor C14 between foot and C1- pin, the capacitor C15 being connected between the C2+ pin and C2- pin of program burn writing chip U4,
The capacitor C16 being connected between the V- pin and GND pin of program burn writing chip U4, and with program burn writing chip U4's
The RS232 interface that T2OUT pin, R2IN pin connect one to one.
Compared with prior art, the utility model has the following beneficial effects:
(1) the utility model dexterously uses the modulus conversion chip conversion people, quotient, adopts in commercial power (especially civilian)
Current signal and temperature signal of collection etc., the operation conditions of real-time monitoring circuit are effectively prevented from high temperature, overload and Leakage Current
Operation.The utility model can be realized the monitoring of electricity consumption state trend, be prevented by the action value of fire alarm default in single-chip microcontroller
In possible trouble.
(2) reverse voltage protection circuit and DC converting circuit is dexterously arranged in the utility model, guarantees that power supply is reliable, has
Effect ground blocks backward voltage to enter in DC converting circuit.Under normal circumstances, using mains-supplied while, and to lithium battery
It charges.And if only if when external alternating current disappears, just using lithium battery power supply, in this way, just can solve in the prior art
It powers insecure problem.
(3) the utility model has dexterously used wireless communication chips, and the wireless communication chips and mobile terminal device connect
It connects, and utilizes mobile terminal device visual observation electricity consumption situation.In conclusion the utility model has, structure is simple, powers
Reliably, the advantages that comprehensive is detected, there is very high practical value and promotional value in electrical fire monitoring technical field.
Detailed description of the invention
In order to illustrate more clearly of the technical solution of the utility model embodiment, will use below required in embodiment
Attached drawing is briefly described, it should be understood that the following drawings illustrates only some embodiments of the utility model, therefore is not to be seen as
It is the restriction to protection scope, it to those skilled in the art, without creative efforts, can be with root
Other relevant attached drawings are obtained according to these attached drawings.
Fig. 1 is the structural schematic diagram of the utility model.
Specific embodiment
It is practical to this with reference to the accompanying drawings and examples to keep the purposes, technical schemes and advantages of the application apparent
Novel to be described further, the embodiments of the present invention includes but is not limited to the following example.Based on the reality in the application
Apply example, those of ordinary skill in the art's every other embodiment obtained without making creative work, all
Belong to the range of the application protection.
Embodiment
As shown in Figure 1, present embodiments providing a kind of multifunctional electric fire-disaster monitoring device based on Internet of Things, including type
Number be STC12C5A60S2 eight Strong MCU U1, the crystal oscillating circuit being connect with single-chip microcontroller U1, program burn writing circuit,
ADC0809CCN modulus conversion chip U2, radio communication circuit, lithium battery and DC power-supply circuit.Wherein, DC power-supply circuit
Output connect respectively with lithium battery, modulus conversion chip U2, program burn writing circuit and radio communication circuit.In addition, modulus turns
The input for changing chip U2 is adopted with electric signals such as current transformer, remaining detector, voltage transformer and hygrosensors respectively
Collect component connection.In the present embodiment, when the residual current of power circuit is more than residual current alarm setting value, report is executed
It is alert.Alarm setting value can be set according to the size of the normal leakage current of route, should follow to be not less than in the setting of the value and be protected
Twice for protecting electric wiring normal leakage current maxima, and it is not more than 1000mA.In addition, monitoring distribution by temperature sensor
The temperature of case, cable or cable connection, when being more than temperature movement setting value, be delayed certain time, executes alarm operation.Temperature
The necessary fixing-stable of the installation of sensor, prevents from falling and causes line short.Factory default temperature alarming setting value is 55 DEG C, is moved
Making delay time is 5.0S.At the same time, the present embodiment measures the real available value of three-phase current by current sampling circuit, works as survey
Magnitude is more than that overcurrent acts setting value, and be delayed certain time, executes alarm.Factory default overcurrent protection acts setting value
160A, delay time 5.0S.The present embodiment is also provided with the voltage that voltage transformer acquisition electricity consumption carries out, when primary voltage is super
After over-voltage acts setting value, be delayed certain time, executes alarm, and it is 270v that factory default overvoltage protection, which acts setting value, is prolonged
When the time be 5.0S.Above-mentioned parameter design can be actually needed according to user and Protection parameters calculate setting, the standard of setting
It is the prior art with calculation, just it will not go into details herein.It should be noted that the present embodiment is structure-based improvement, and
The software program not being used for improves, the content that those skilled in the art records according to the present embodiment, using routine
Usability of program fragments compiling just can obtain the software program of the present embodiment, therefore, just it will not go into details herein.At the same time, this implementation
The parameter of electric components in example is obtained using conventional calculation formula, details are not described herein again parameter calculation procedure.?
In the present embodiment, SCM program programming setting is carried out using program burn writing circuit.Specifically, which includes
VCC pin is connect with the cathode of diode D6 and the program burn writing chip U4 of model MAX232, is connected to program burn writing chip
Capacitor C12 between the VCC pin and GND pin of U4 is connected between the VCC pin and V+ pin of program burn writing chip U4
Capacitor C13, the capacitor C14 being connected between the C1+ pin and C1- pin of program burn writing chip U4, is connected to program burn writing core
Capacitor C15 between the C2+ pin and C2- pin of piece U4, is connected between the V- pin and GND pin of program burn writing chip U4
Capacitor C16, and the RS232 interface to connect one to one with the T2OUT pin of program burn writing chip U4, R2IN pin.This
Embodiment can be by program burn writing circuit configuration operating parameter alarming value, when appearance overload, excess temperature, short trouble in electricity consumption
When, signal that modulus conversion chip U2 the is converted alarming value advance with single-chip microcontroller U1 is compared, is prompted.
In the present embodiment, radio communication circuit includes the wireless communication chips U3 of model nRF401, is connected to wireless
The PF_PWR pin of inductance L1 between the VCO1 pin and VCO2 pin of communication chip U3, one end and wireless communication chips U3 connect
Connect and the other end ground connection resistance R2, one end connect with the FILT1 pin of wireless communication chips U3 and the other end be grounded electricity
Hold C6, the resistance R3 and capacitor C5 that one end is connect with the FILT1 pin of wireless communication chips U3 after series connection and the other end is grounded,
The capacitor C8 being connected between the ANT1 pin of wireless communication chips U3 and ANT2 pin, one end and wireless communication chips U3's
The capacitor C7 of the connection of ANT1 pin and other end ground connection, one end is connect with the ANT2 pin of wireless communication chips U3 and the other end
The capacitor C9 of ground connection, one end is connected between capacitor C7 and capacitor C8 and the other end is connected between capacitor C8 and capacitor C9
Inductance L2, one end is connected to the inductance L3 and capacitor C10 that between capacitor C7 and capacitor C8 and the other end is grounded, series connection after series connection
One end is connected between capacitor C8 and capacitor C9 and the inductance L4 and capacitor C11 of other end ground connection afterwards, be connected to capacitor C10 with
Antenna between capacitor C11, the crystal oscillator Y2 being connected to after in parallel between the XC1 pin of wireless communication chips U3 and XC2 pin and
Resistance R1, one end is connect with the XC1 pin of wireless communication chips U3 and the capacitor C3 of other end ground connection and one end and wireless
The XC2 pin of communication chip U3 connects and the capacitor C4 of other end ground connection；The VCC1 pin of the wireless communication chips U3,
VCC2 pin and VCC3 pin are connect with DC power-supply circuit.Wherein, the PWR_UP pin of the wireless communication chips U3 with
The serial port P2.4 connection of single-chip microcontroller U1.The TXEN pin of the wireless communication chips U3 and the serial port P2.3 of single-chip microcontroller U1 connect
It connects；The CS pin of the wireless communication chips U3 is connect with the serial port P2.2 of single-chip microcontroller U1.The wireless communication chips U3's
DIN pin is connect with the serial port P2.1 of single-chip microcontroller U1.The DOUT pin of the wireless communication chips U3 and the string of single-chip microcontroller U1
The P2.0 connection of row mouth.In the present embodiment, it is connect using wireless communication chips U3 with mobile terminal device, by modulus conversion chip
Electric current, the temperature signal of U2 acquisition receive through single-chip microcontroller U1 and are sent to wireless communication chips U3, and user is set using mobile terminal
Standby observation electricity consumption situation.Wherein, radio communication circuit is existing module, and wireless transmission does not transmit specific action process herein just not
It gives and repeating.
In the present embodiment, in order to guarantee that power supply is reliable, by external alternating current be converted into the direct current of+5V for single-chip microcontroller U1,
Modulus conversion chip U2, wireless communication chips U3 and program burn writing chip U4 are used, meanwhile, it charges to lithium battery.This is straight
Stream power supply circuit includes the bridge rectifier D 1 that input terminal is connect with transformer T1 with the outside transformer T1 that is electrically connected of city again,
With the DC converting circuit of the output connection of bridge rectifier D 1, and be connected to bridge rectifier D 1 and DC converting circuit it
Between reverse voltage protection circuit.Wherein, DC converting circuit includes the resistance that one end is connected between resistance R4 and resistance R6
R8, the N-channel field-effect tube Q3 that grid is connect with the other end of resistance R8, one end connect with the drain electrode of N-channel field-effect tube Q3,
And the resistance R9 of other end ground connection, one end is connected between resistance R4 and resistance R6 and the capacitor C17 of other end ground connection, anode
The diode D3 being connect with the source electrode of N-channel field-effect tube Q3, it is in parallel after one end connect with the cathode of diode D3 and the other end
The capacitor C18 and resistance R10 being connected between capacitor C17 and resistance R8 have two primary coils, one secondary coil, model
The transformer T2 of EE18, the diode D5 that anode is connect with an output end of the secondary coil of transformer T2, anode and transformer
The diode D4 that another output end of the secondary coil of T2 connects and cathode is connect with the cathode of diode D5, one end and two poles
The cathode of pipe D5 connects and the capacitor C19 of other end ground connection, the diode D6 that anode is connect with the cathode of diode D5, one end
The resistance 11 connecting with the anode of diode D6, base stage connect with the other end of resistance R11, the cathode of collector and diode D5
The triode Q4 and grid of connection and the anode connection of emitter and lithium battery connect with the anode of diode D6, drain and
The P-channel field-effect transistor (PEFT) pipe Q5 that the anode of lithium battery connects and source electrode is connect with the cathode of diode D6.In addition, backward voltage is protected
Protection circuit includes resistance R4, diode D2 and the resistance R5 being connected between two outputs of bridge rectifier D 1 after connecting, one end
The resistance R6 being connected between resistance R4 and an output end of bridge rectifier D 1, grid be connected to diode D2 and resistance R5 it
Between, the N-channel field-effect that is connect with another output end of bridge rectifier D 1 of the other end connection of source electrode and resistance R6 and drain electrode
Pipe Q1, the resistance R7 and grid that one end is connect with the source electrode of N-channel field-effect tube Q1 connect with the other end of resistance R7, leak
The drain electrode connection of pole and N-channel field-effect tube Q1 and the N-channel field-effect tube Q2 of source electrode ground connection.It should be noted that transformer
The centre tap of the secondary coil of T2 is grounded, one end of the first primary coil of transformer T2 and the grid of N-channel field-effect tube Q3
Pole connection and the other end be grounded, and one end of the second primary coil of transformer T2 be connected between resistance R8 and capacitor C17,
And the other end is connect with the source electrode of N-channel field-effect tube Q3.When normal power supply, N-channel field-effect tube Q2 is in the conductive state, N
Channel field-effect pipe Q1 is in off state, when there is backward voltage waveform in 1 failure of bridge rectifier D, triggering N-channel field effect
Should pipe Q1 conducting, and make N-channel field-effect tube Q2 end, effectively block backward voltage enter in DC converting circuit, prevent
Backward voltage damages lithium battery.
In the present embodiment, electric parameter is as follows: resistance R1 is 100k Ω, and resistance R2 is 22k Ω, and resistance R3 is 100 Ω,
Resistance R4 is 5.1k Ω, and resistance R5 is 4.7k Ω, and resistance R6 is 10k Ω, and resistance R7 is 10k Ω, and resistance R8 is 100 Ω, resistance
R9 is 1k Ω, and resistance R10 is 1k Ω, and resistance R11 is 1k Ω, and capacitor C1 is 30pF, and capacitor C2 is 30pF, and capacitor C3 is 22pF,
Capacitor C4 is 22pF, and capacitor C5 is 100pF, and capacitor C6 is 220pF, and capacitor C7 is 220pF, and capacitor C8 is 5.5pF, and capacitor C9 is
5.5pF, capacitor C10 are 220pF, and capacitor C11 is 220pF, and capacitor C12 is 100uF, and capacitor C13 is 100uF, and capacitor C14 is
1uF, capacitor C15 are 1uF, and capacitor C16 is 1uF, and capacitor C17 is 220uF/220V, and capacitor C18 is 20pF, and capacitor C19 is
220uF, inductance L1 are 220uH, and inductance L2 is 100uH, and inductance L3 is 220uH, and inductance L4 is 220uH.
In the present embodiment, when external alternating current normal power supply, the direct current of the cathode output+5V of diode D5, a side
Face is that single-chip microcontroller U1, modulus conversion chip U2, wireless communication chips U3 and program burn writing chip U4 power；On the other hand ,+5V
Direct current trigger triode Q4 conducting, and then charge to lithium battery.At this point, source electrode and the leakage of P-channel field-effect transistor (PEFT) pipe Q5
Pole cut-off, in this way, can guarantee that lithium battery is in a single state of charge or discharge, just to extend the use longevity of lithium battery
Life.When, external alternating current disappears (alternating current normally disappears or electrical fire causes alternating current to disappear), P-channel field-effect transistor (PEFT)
The source electrode of pipe Q5 and drain electrode are connected, by lithium battery to single-chip microcontroller U1, modulus conversion chip U2, wireless communication chips U3 and program
Programming chip U4 power supply.At this point, due to being provided with diode D6, so that the base stage of triode Q4 is in low level, triode Q4
Collector and emitter be in off state, being designed in this way is advantageous in that, prevents lithium battery reverse power supply, avoids because of direct current
There are fault ground points to cause monitoring power supply unreliable in power supply circuit and/or external mains circuit.It can be said that the utility model
With substantive features and progress, had a vast market foreground in field in the people, quotient, commercial power.
Above-described embodiment is only the preferred embodiment of the utility model, is not intended to limit the scope of the present invention,
In every case the design principle of the utility model is used, and carries out the non-creative variation worked and made on this basis, it should all
Belong within the protection scope of the utility model.
Claims (3)
1. the multifunctional electric fire-disaster monitoring device based on Internet of Things, which is characterized in that including model STC12C5A60S2's
Eight Strong MCU U1, the crystal oscillating circuit being connect with single-chip microcontroller U1, program burn writing circuit, modulus conversion chip U2, nothing
Line telecommunication circuit, lithium battery and DC power-supply circuit；The output of the DC power-supply circuit respectively with lithium battery, analog-to-digital conversion core
Piece U2, program burn writing circuit are connected with radio communication circuit；
The radio communication circuit includes the wireless communication chips U3 of model nRF401, is connected to wireless communication chips U3's
Inductance L1 between VCO1 pin and VCO2 pin, one end is connect with the PF_PWR pin of wireless communication chips U3 and the other end
The resistance R2 of ground connection, one end is connect with the FILT1 pin of wireless communication chips U3 and the capacitor C6 of other end ground connection, after series connection
One end is connect with the FILT1 pin of wireless communication chips U3 and the resistance R3 and capacitor C5 of other end ground connection, is connected to channel radio
Believe the capacitor C8 between the ANT1 pin and ANT2 pin of chip U3, one end connect with the ANT1 pin of wireless communication chips U3,
And the capacitor C7 of other end ground connection, one end is connect with the ANT2 pin of wireless communication chips U3 and the capacitor C9 of other end ground connection,
One end is connected between capacitor C7 and capacitor C8 and the other end is connected to the inductance L2 between capacitor C8 and capacitor C9, after series connection
One end is connected between capacitor C7 and capacitor C8 and the inductance L3 and capacitor C10 of other end ground connection, and one end is connected to electricity after series connection
Hold the inductance L4 and capacitor C11 that between C8 and capacitor C9 and the other end is grounded, is connected to the day between capacitor C10 and capacitor C11
Line, the crystal oscillator Y2 and resistance R1, one end and nothing being connected to after in parallel between the XC1 pin of wireless communication chips U3 and XC2 pin
The XC1 pin of line communication chip U3 connects and the capacitor C3 of the other end ground connection and XC2 of one end and wireless communication chips U3
The capacitor C4 of pin connection and other end ground connection；VCC1 pin, VCC2 pin and the VCC3 pin of the wireless communication chips U3
It is connect with DC power-supply circuit；The PWR_UP pin of the wireless communication chips U3 and the serial port P2.4 of single-chip microcontroller U1 connect
It connects；The TXEN pin of the wireless communication chips U3 is connect with the serial port P2.3 of single-chip microcontroller U1；The wireless communication chips U3
CS pin connect with the serial port P2.2 of single-chip microcontroller U1；The DIN pin of the wireless communication chips U3 and the string of single-chip microcontroller U1
The P2.1 connection of row mouth；The DOUT pin of the wireless communication chips U3 is connect with the serial port P2.0 of single-chip microcontroller U1；
The DC power-supply circuit includes the transformer T1 being electrically connected with external city, and the bridge-type that input terminal is connect with transformer T1 is whole
Device D1 is flowed, the DC converting circuit with the output connection of bridge rectifier D 1, and it is connected to bridge rectifier D 1 and direct current turn
Change the reverse voltage protection circuit between circuit；
The reverse voltage protection circuit includes the resistance R4 being connected between two outputs of bridge rectifier D 1 after connecting, two poles
Pipe D2 and resistance R5, one end are connected to the resistance R6 between resistance R4 and an output end of bridge rectifier D 1, and grid is connected to
Between diode D2 and resistance R5, another output of the connection of the other end of source electrode and resistance R6 and drain electrode and bridge rectifier D 1
The N-channel field-effect tube Q1 of connection is held, the resistance R7 and grid and electricity that one end is connect with the source electrode of N-channel field-effect tube Q1
Hinder the other end connection, drain electrode and the drain electrode connection of N-channel field-effect tube Q1 and the N-channel field-effect tube Q2 of source electrode ground connection of R7；
The anode of the diode D2 is connect with resistance R5 and cathode is connect with resistance R4.
2. the multifunctional electric fire-disaster monitoring device according to claim 1 based on Internet of Things, which is characterized in that described straight
Stream conversion circuit includes the resistance R8 that one end is connected between resistance R4 and resistance R6, and grid is connect with the other end of resistance R8
The drain electrode connection of N-channel field-effect tube Q3, one end and N-channel field-effect tube Q3 and the resistance R9 of other end ground connection, one end connection
Between resistance R4 and resistance R6 and the capacitor C17 of other end ground connection, anode are connect with the source electrode of N-channel field-effect tube Q3
Diode D3, the cathode of one end and diode D3 connect after parallel connection and the other end is connected to the electricity between capacitor C17 and resistance R8
Hold C18 and resistance R10, the transformer T2 with two primary coils, one secondary coil, model EE18, anode is with transformer T2's
Secondary coil an output end connection diode D5, anode connect with another output end of the secondary coil of transformer T2 and
The diode D4 that cathode is connect with the cathode of diode D5, one end is connect with the cathode of diode D5 and the electricity of other end ground connection
Hold C19, the diode D6 that anode is connect with the cathode of diode D5, the resistance 11 that one end is connect with the anode of diode D6, base
Pole connect with the other end of resistance R11, the cathode connection of collector and diode D5 and the anode of emitter and lithium battery connect
Triode Q4 and grid is connect with the anode of diode D6, drain connect and source electrode and diode with the anode of lithium battery
The P-channel field-effect transistor (PEFT) pipe Q5 of the cathode connection of D6；The centre tap of the secondary coil of the transformer T2 is grounded；The transformer
One end of the first primary coil of T2 is connect with the grid of N-channel field-effect tube Q3 and the other end is grounded；The transformer T2's
One end of second primary coil is connected between resistance R8 and capacitor C17 and the source electrode of the other end and N-channel field-effect tube Q3 connect
It connects；Cathode of the power input Vcc of the power input VCC and modulus conversion chip U2 of the single-chip microcontroller with diode D6
Connection；VCC1 pin, VCC2 pin and the VCC3 pin of the wireless communication chips U3 is connect with the cathode of diode D6.
3. the multifunctional electric fire-disaster monitoring device according to claim 2 based on Internet of Things, which is characterized in that the journey
Sequence programming circuit includes that VCC pin is connect and the program burn writing chip U4 of model MAX232 with the cathode of diode D6, connection
Capacitor C12 between the VCC pin and GND pin of program burn writing chip U4, is connected to the VCC pin of program burn writing chip U4
Capacitor C13 between V+ pin, the capacitor C14 being connected between the C1+ pin and C1- pin of program burn writing chip U4, even
The capacitor C15 between the C2+ pin and C2- pin of program burn writing chip U4 is met, the V- for being connected to program burn writing chip U4 draws
Capacitor C16 between foot and GND pin, and connect one to one with the T2OUT pin of program burn writing chip U4, R2IN pin
RS232 interface.
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| CN201822201568.6U CN209044817U (en) | 2018-12-26 | 2018-12-26 | Multifunctional electric fire-disaster monitoring device based on Internet of Things |
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| CN201822201568.6U CN209044817U (en) | 2018-12-26 | 2018-12-26 | Multifunctional electric fire-disaster monitoring device based on Internet of Things |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116524668A (en) * | 2023-05-11 | 2023-08-01 | 南京航空航天大学 | Machine carries intelligent combined type fire detection device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116524668A (en) * | 2023-05-11 | 2023-08-01 | 南京航空航天大学 | Machine carries intelligent combined type fire detection device |
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