CN109491299A - A kind of super low-power consumption data collection station based on MCU - Google Patents
A kind of super low-power consumption data collection station based on MCU Download PDFInfo
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0423—Input/output
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
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- G05B2219/21119—Circuit for signal adaption, voltage level shift, filter noise
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Abstract
The invention discloses a kind of super low-power consumption data collection station based on MCU, includes embedded microcontroller U1, is connected to the signal condition and A/D converter circuit of USB interface on embedded microcontroller U1, battery charging management circuit and sensor.The present invention may be implemented to be cut off the power in data acquisition gap by data collection station is automatic or manual, zero-power is realized so as to ensure to acquire gap in data, the mode of the control cutting system power supply than purely by method of manually cutting off the power it is more thorough, than using embedded microprocessor suspend mode or standby mode power consumption it is much lower.
Description
Technical field
The present invention relates to on-site data gathering application field, specifically a kind of super low-power consumption data based on MCU are acquired eventually
End.
Background technique
It in many application fields, handles after on the one hand needing to be acquired data preservation, on the other hand needs again
Data acquisition instrument has long-time idle function, and such as the application in field on-fixed place, data collection station can only be adopted
It is powered with battery, the power consumption of data collection station and can work long hours that it is very important.For low-power consumption, number
It is relatively easy to realize according to acquisition and storage.The current method for realizing low power consumption based on embedded MCU mostly uses two methods: one
Kind method is: not cutting system power supply, using function such as embedded microprocessor cooperation the standby of microprocessor of low-power consumption, suspend mode
Be able to achieve the low-power consumption of system, this method is commonly available lower system power dissipation, but due to microprocessor even at
Suspend mode and standby mode, can still consume energy, other circuits of simultaneity factor can also generate the static consumption electric current of part；It is another
Kind method is to switch the zero-power of realization system by purely artificial method power cutoff plus power switch, but if grasp
Forget that the system power supply larger energy consumption useless it will cause possible long-time is turned off manually as personnel.It is adopted in battery powered data
In collecting system, data acquisition is intermittent noncontinuity mostly, can be spaced the long period again after usual data acquisition
It is acquired next time, so, within the data acquisition intermittent time, if can be automatic by the consumption electric current energy of data collection station
Control is in the case where almost nil, it is clear that smaller than by the suspend mode of embedded microprocessor or the power consumption of standby mode
It is more, so as to reduce the energy consumption of data collection station with more reducing, extend battery powered data collection station it is standby when
Between.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of super low-power consumption data collection station based on MCU, Ke Yishi
Present data acquisition gap is cut off the power by data collection station is automatic or manual, real so as to ensure to acquire gap in data
Existing zero-power, the mode of the control cutting system power supply than purely by method of manually cutting off the power it is more thorough, it is more embedded than use
Microprocessor sleeping or standby mode power consumption are much lower.
The technical solution of the present invention is as follows:
A kind of super low-power consumption data collection station based on MCU, includes embedded microcontroller U1, is connected to embedded
The signal condition and A/D converter circuit of USB interface, battery charging management circuit and sensor on microcontroller U1；
The battery charging management circuit include charging chip U4, low quiescent current LDO linear regulator chip U3,
NPN triode Q1, NPN triode Q2, PNP triode Q3, it is multiple manually control key and several resistance and capacitor, described fills
The BAT pin of electrical chip U4, the emitter of PNP triode Q3 are connect with the anode of battery connecting interface J1, charging chip U4
The charging detection interface of CHRG pin and embedded microcontroller U1 connect, the VCC interface of charging chip U4 connects with USB respectively
The base stage connection of mouth, NPN triode Q2, the collector of NPN triode Q2, the collector of NPN triode Q1, USB interface are multiple
The one end for manually controlling key is connect with the base stage of PNP triode Q3, the emitter ground connection of NPN triode Q2, PNP triode
The collector of Q3, the base stage of NPN triode Q1 are all connected with the power input of LDO linear regulator chip U3, LDO linear voltage stabilization core
The output end of piece U3 includes digital circuit power source VCC and analog circuit power supply AVCC, the emitter of NPN triode Q1 and insertion
Decline the power supply automatic control interface connection of controller U1, and multiple other ends for manually controlling key are and embedded microcontroller
The power supply manual control interface of U1 connects, and multiple other ends for manually controlling key pass through resistance eutral grounding；
The signal condition and A/D converter circuit of the sensor include modulus conversion chip U5 and sensor interface P2,
The analog input end of modulus conversion chip U5 is connect with sensor interface P2, the digital output end of modulus conversion chip U5 with
The data collection terminal of embedded microcontroller U1 connects.
The USB interface includes USB chip USB1, resistance R3, resistance R5, resistance R6, Transient Suppression Diode TV3
And one end of TV4, the resistance R3 and one end of resistance R5 USB transmission interface corresponding with embedded microcontroller U1 connect
Connect, one end of resistance R6 and ground connection, the other end of resistance R3, Transient Suppression Diode TV3 one end with USB chip USB1's
Pin 2 connects, and the other end of resistance R5, one end of Transient Suppression Diode TV4 are connect with the pin 3 of USB chip USB1, electricity
The other end of resistance R6 is connect with the pin 4 of USB chip USB1, the other end, the Transient Suppression Diode of Transient Suppression Diode TV3
The other end of TV4 is grounded.
The CHRG pin of the charging chip U4 detects interface by the charging of resistance R30 and embedded microcontroller U1
CHRG_DET_O connection, the CHRG pin of charging chip U4 directly detect interface CHRG_ with the charging of embedded microcontroller U1
The CHRG pin of DET_I connection, charging chip U4 connects digital circuit power source VCC by resistance R34；The charging chip U4
VCC interface connect with the pin 1 of USB chip USB1 by resistance R28, the VCC interface of charging chip U4 passes sequentially through resistance
It is connect after R28, resistance R26 with the base stage of NPN triode Q2, the VCC interface of charging chip U4 is grounded by capacitor C17, NPN tri-
The base stage of pole pipe Q2 is grounded by resistance R22, and the collector of NPN triode Q2 passes through the base stage of resistance R23 and PNP triode Q3
Connection, the collector of NPN triode Q1 connect by resistance R16 with the base stage of PNP triode Q3, multiple keys that manually control
One end is connect by corresponding resistance with the base stage of PNP triode Q3 respectively, and the collector of NPN triode Q2 passes sequentially through resistance
It being connect after R23, resistance R25 with the emitter of PNP triode Q3, the base stage of NPN triode Q1 is connect with one end of resistance R17,
And the base stage of NPN triode Q1 is grounded by resistance R18, the other end of resistance R17 respectively with capacitor C9, capacitor C10, resistance
The power input of R20 with LDO linear regulator chip U3 connects, and the other end of capacitor C9, the other end of capacitor C10 are grounded, electricity
The other end of resistance R20 is grounded by resistance R21, and the U_DET pin of the other end of resistance R20 and embedded microcontroller U1 connect
Connect, the output end of LDO linear regulator chip U3, one end of capacitor C11, one end of capacitor C12, resistance R24 one end with number
The VCC connection of word circuit power, the other end of capacitor C11, the other end of capacitor C12, resistance R27 one end be grounded, resistance R24
The other end, one end of capacitor C13, one end of capacitor C14 connect with analog circuit power supply AVCC, the other end of resistance R27,
The other end of capacitor C13, the other end of capacitor C14 are grounded, and multiple other ends for manually controlling key pass through electricity
Hinder R15 ground connection.
The signal condition and A/D converter circuit of the sensor further include having resistance R29, resistance R37, transient state to inhibit two
Pole pipe TV1 and TV2, resistance R31, resistance R35, capacitor C15, capacitor C16, capacitor C18, capacitor C19, resistance R32 and resistance
The pin 1 of R36, sensor interface P2 are connect with one end of resistance R37, the pin 2 of sensor interface P2, resistance R37 it is another
It holds, one end of Transient Suppression Diode TV2 is connect with resistance R35, the other end ground connection of Transient Suppression Diode TV2, resistance
The other end of R35 is connect with the analog input end AIN+ of modulus conversion chip U5, and the other end of resistance R35 passes through capacitor
C19 ground connection, the pin 4 of sensor interface P2 connect with one end of resistance R29, the pin 3 of sensor interface P2, resistance R29
The other end, Transient Suppression Diode TV1 one end connect with resistance R31, the other end of Transient Suppression Diode TV1 ground connection,
The other end of resistance R31 is connect with the analog input end AIN- of modulus conversion chip U5, and the other end of resistance R31 successively leads to
It crosses capacitor C18, capacitor C15 to connect with the REFOUT pin of modulus conversion chip U5, the VCC pin connection of modulus conversion chip U5
The VCC pin of digital circuit power source VCC, modulus conversion chip U5 are grounded by capacitor C16, and the SCK of modulus conversion chip U5 draws
Foot is connect by resistance R36 with the pulse output pin of embedded microcontroller U1, the SDO pin of modulus conversion chip U5 with it is embedding
Enter to decline controller U1 data collection terminal connection.
LCD display interface circuit, the embedded microcontroller are also connected on the embedded microcontroller U1
Device U1 is connect by LCD display interface circuit with LCD display.
The embedded microcontroller U1 selects the super low-power consumption MCU based on ARM Cortex core.
The modulus conversion chip U5 selects 24 modulus conversion chips of sigma-delta type.
Advantages of the present invention:
The present invention is powered using chargeable single-unit high-capacity lithium battery, is equipped with battery charging management circuit, and charging interface is adopted
With Micro USB interface, while USB storage medium can be connected by the interface or connect with PC machine by the storing data of inside
It is read out according to csv file format；Control core embedded microcontroller U1 of the invention, which is used, is based on ARM Cortex core
Super low-power consumption MCU；The analog signal of data sampling sensor output carries out modulus by signal condition and A/D converter circuit and turns
It changes, the result of AD conversion is read by MCU and carried out respective handling by the synchronous serial interface of 2 lines, and the data acquired in real time are logical
The liquid crystal display LCD for crossing low-power consumption shows that the data acquired in real time can be stored in not used FLASH storage inside MCU
In the storage medium connected in device or by Micro USB；The present invention utilizes the battery charging management that can automatically and manually turn off
Circuit realize acquire gaps interrupt system power supply in data with realize system at this stage close to zero-power；Data of the invention
Acquisition terminal configuration is multiple to manually control key, on the one hand realizes that configuration, calibration of system parameter etc. operates, on the other hand can be with
Pass through any manual shutdown or power up function for manually controlling key and realizing data collection station.
Detailed description of the invention
Fig. 1 is the minimum system circuit diagram of embedded microcontroller U1 of the present invention.
Fig. 2 is the circuit diagram of USB interface of the present invention.
Fig. 3 is the circuit diagram of battery charging management circuit of the present invention.
Fig. 4 is the circuit diagram of signal condition of the present invention and A/D converter circuit.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
A kind of super low-power consumption data collection station based on MCU, includes embedded microcontroller U1, is connected to embedded
The signal condition and A/D converter circuit of USB interface, battery charging management circuit and sensor on microcontroller U1；
See that Fig. 1 and Fig. 2, USB interface include USB chip USB1, resistance R3, resistance R5, resistance R6, two poles of transient state inhibition
Pipe TV3 and TV4, one end of resistance R3 USB transmission interface D- corresponding with embedded microcontroller U1, that is, pin 44 connect, resistance
One end of R5 USB transmission interface D+ corresponding with embedded microcontroller U1, that is, pin 45 connects, one end of resistance R6 and ground connection,
The other end of resistance R3, one end of Transient Suppression Diode TV3 are connect with the pin 2 of USB chip USB1, and resistance R5's is another
It holds, one end of Transient Suppression Diode TV4 is connect with the pin 3 of USB chip USB1, the other end and USB chip of resistance R6
The pin 4 of USB1 connects, and the other end of Transient Suppression Diode TV3, the other end of Transient Suppression Diode TV4 are grounded；Electricity
R3, R5 and R6 are hindered for the interference signal energy absorption in USB swapping process, and Transient Suppression Diode TV3 and TV4 are for preventing
The damage of USB device caused by surge；
See that Fig. 1-Fig. 3, battery charging management circuit include the LDO linear voltage stabilization core of charging chip U4, low quiescent current
Piece U3, NPN triode Q1, NPN triode Q2, PNP triode Q3, six manually control key Key1-Key6 and several resistance
And capacitor, the BAT pin of charging chip U4, the emitter of PNP triode Q3 are connect with the anode of battery connecting interface J1, electricity
The cathode of pond connecting interface J1 is grounded, CHRG pin the filling by resistance R30 and embedded microcontroller U1 of charging chip U4
Electro-detection interface CHRG_DET_O, that is, pin 24 connects, and the CHRG pin of charging chip U4 is directly with embedded microcontroller U1's
Charging detection interface CHRG_DET_I, that is, pin 25 connects, and the CHRG pin of charging chip U4 connects number electricity by resistance R34
Road power supply VCC；The VCC interface of charging chip U4 is connect by resistance R28 with the pin 1 of USB chip USB1, charging chip U4's
VCC interface is connect after passing sequentially through resistance R28, resistance R26 with the base stage of NPN triode Q2, and the VCC interface of charging chip U4 is logical
Capacitor C17 ground connection is crossed, the base stage of NPN triode Q2 is grounded by resistance R22, and the collector of NPN triode Q2 passes through resistance R23
Connect with the base stage of PNP triode Q3, the collector of NPN triode Q2 pass sequentially through after resistance R23, resistance R25 with tri- pole PNP
The emitter of pipe Q3 connects, and the emitter ground connection of NPN triode Q2, the collector of NPN triode Q1 passes through resistance R16 and PNP
The base stage of triode Q3 connects, six one end for manually controlling key Key1-Key6 pass through respectively corresponding resistance R4, R7, R9,
R10, R12 or R14 are connect with the base stage of PNP triode Q3, and the base stage of NPN triode Q1 is connect with one end of resistance R17, and
The base stage of NPN triode Q1 is grounded by resistance R18, the other end of resistance R17 respectively with capacitor C9, capacitor C10, resistance R20
It is connected with the power input of LDO linear regulator chip U3, the other end of capacitor C9, the other end of capacitor C10 are grounded, resistance
The other end of R20 is grounded by resistance R21, and the other end of resistance R20 and the U_DET pin of embedded microcontroller U1 draw
Foot 20 connects, the output end of LDO linear regulator chip U3, one end of capacitor C11, one end of capacitor C12, resistance R24 one end
Connect with digital circuit power source VCC, the other end of capacitor C11, the other end of capacitor C12, resistance R27 one end be grounded,
The other end of resistance R24, one end of capacitor C13, capacitor C14 one end connect with analog circuit power supply AVCC, resistance R27's
The other end, the other end of capacitor C13, capacitor C14 the other end be grounded, the emitter of NPN triode Q1 and embedded micro-control
The power supply automatic control interface of device U1 processed, that is, pin 21 connects, six other ends for manually controlling key Key1-Key6 with it is embedding
The power supply manual control interface i.e. pin 14 of controller U1 of entering to decline connects, and six manually control the another of key Key1-Key6
One end passes through resistance R15 and is grounded；Wherein, charging chip U4 charging current can be set by resistance R33, maximum programming electricity
It flows up to 800mA, while charged state standby signal being provided；LDO linear regulator chip U3 exports 3.0V power supply as system progress
Power supply, wherein VCC is data collection station digital circuit power source, and AVCC is analog portion circuit power, and the two passes through two 0 Europe
Nurse resistance R24 and R27 are isolated, and Key1-Key6 is 6 miniature keys, for system parameter input, calibration and on-off system
The operation such as power supply, triode Q1-Q3 are low-power transistor.When different key in 6 miniature keys is pressed, corresponding K_
Voltage at ADC is different, send 12 ADC inside MCU to convert the analog voltage at K_ADC, and different keys is corresponding
Different AD conversion values, so as to realize the discrimination of key, this kind of method only needs a signal wire that can realize multiple stand alone types
The key assignments of keyboard obtains；
See Fig. 1 and Fig. 4, the signal condition and A/D converter circuit of sensor include that modulus conversion chip U5, sensor connect
Mouth P2 and resistance R29, resistance R37, Transient Suppression Diode TV1 and TV2, resistance R31, resistance R35, capacitor C15, capacitor
The pin 1 of C16, capacitor C18, capacitor C19, resistance R32 and resistance R36, sensor interface P2 are connect with one end of resistance R37,
The pin 2 of sensor interface P2, the other end of resistance R37, Transient Suppression Diode TV2 one end connect with resistance R35, wink
State inhibits the other end ground connection of diode TV2, the other end of resistance R35 and the analog input end AIN+ of modulus conversion chip U5
Connection, and the other end of resistance R35 is grounded by capacitor C19, the pin 4 of sensor interface P2 is connect with one end of resistance R29,
The pin 3 of sensor interface P2, the other end of resistance R29, Transient Suppression Diode TV1 one end connect with resistance R31, wink
State inhibits the other end ground connection of diode TV1, the other end of resistance R31 and the analog input end AIN- of modulus conversion chip U5
Connection, and the other end of resistance R31 passes sequentially through capacitor C18, capacitor C15 and the REFOUT pin of modulus conversion chip U5 connects
It connects, the VCC pin of modulus conversion chip U5 connects digital circuit power source VCC, and the VCC pin of modulus conversion chip U5 passes through capacitor
C16 ground connection, the SCK pin of modulus conversion chip U5 are by the pulse output pin of resistance R36 and embedded microcontroller U1
Pin 3 connects, and the SDO pin of modulus conversion chip U5 is connect with the data of embedded microcontroller U1 collection terminal, that is, pin 4.It passes
The output of sensor can may be unipolar signal for differential signal, when output is unipolar signal, by sensor interface
AINN and AGND pin, that is, pin 3 and 4 of P2 is connect, while the output signal of sensor can be biggish signal as lied prostrate
Superfine can also be the smaller signal of millivolt level, can be realized by 24 sigma-delta type ADC.Resistance R29 and R37 are the Europe 680K
Resistance, it is ensured that in sensor internal short-term, ADC transformation result is determining spilling, so that it is guaranteed that MCU is to sensor
State recognized.For protecting modulus conversion chip U5 input terminal over-voltage, modulus turns by Transient Suppression Diode TV1 and TV2
The reference power source for changing chip U5 is provided by the Precision reference source that it is internally integrated.
Wherein, LCD display interface circuit is also connected on embedded microcontroller U1, embedded microcontroller U1 passes through
LCD display interface circuit is connect with LCD display；Embedded microcontroller U1 selects the ultralow function based on ARM Cortex core
Consume MCU；Modulus conversion chip U5 selects 24 modulus conversion chips of sigma-delta type.
The working principle of the invention:
When carrying out charging to lithium battery by USB interface or connecting with the USB interface of PC machine, charging chip U4 can be passed through
It charges to lithium battery, while NPN triode Q2 is connected, thus PNP triode Q3 also saturation conduction, so that charging chip U4
Out-put supply can power to LDO linear regulator chip U3, system obtains normal power supply, is charging or reading data
While, data collection station works normally.
When do not use USB interface charged to lithium battery or read data when, NPN triode Q2 by；Data acquisition
When terminal works normally, the MCU_IO pin of embedded microcontroller U1 exports low level, it is ensured that PNP triode Q3 saturation is led
Logical, system can obtain power supply from lithium battery and obtain stable working power by LDO linear regulator chip U3；If at one section
Time built-in type microcontroller U1 does not carry out any operation to data collection station, and embedded microcontroller U1 is automatically controlled
MCU_IO pin exports high level, and NPN triode Q1 is by so that PNP triode Q3 is also by lithium battery stops being to be
System power supply, it is ensured that the substantially zeroed power consumption of system.If necessary to data collection station hand off power supply, can be adopted in data
When collecting terminal normal work, presses any key Key1-Key6 and relevant keypress function program is cooperated to realize manual power-off operation.
When data collection station needs revert to normal operating conditions from off-position when, press in Key1-Key6 any one by
Key, can make PNP triode Q3 is saturation conduction state, and lithium battery starts for system normal power supply, while by embedded micro-control
Device U1 processed automatically controls MCU_IO pin and exports low level, and after unclamping key, system is still normal operating conditions.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (7)
1. a kind of super low-power consumption data collection station based on MCU, it is characterised in that: include embedded microcontroller U1, even
It is connected to USB interface on embedded microcontroller U1, the signal condition of battery charging management circuit and sensor and AD conversion electricity
Road；
The battery charging management circuit includes LDO linear regulator chip U3, NPN of charging chip U4, low quiescent current
Triode Q1, NPN triode Q2, PNP triode Q3, multiple key and several resistance and capacitor, the charging are manually controlled
The BAT pin of chip U4, the emitter of PNP triode Q3 are connect with the anode of battery connecting interface J1, charging chip U4's
CHRG pin is connect with the charging of embedded microcontroller U1 detection interface, and the VCC interface of charging chip U4 connects with USB respectively
The base stage connection of mouth, NPN triode Q2, the collector of NPN triode Q2, the collector of NPN triode Q1, USB interface are multiple
The one end for manually controlling key is connect with the base stage of PNP triode Q3, the emitter ground connection of NPN triode Q2, PNP triode
The collector of Q3, the base stage of NPN triode Q1 are all connected with the power input of LDO linear regulator chip U3, LDO linear voltage stabilization core
The output end of piece U3 includes digital circuit power source VCC and analog circuit power supply AVCC, the emitter of NPN triode Q1 and insertion
Decline the power supply automatic control interface connection of controller U1, and multiple other ends for manually controlling key are and embedded microcontroller
The power supply manual control interface of U1 connects, and multiple other ends for manually controlling key pass through resistance eutral grounding；
The signal condition and A/D converter circuit of the sensor include modulus conversion chip U5 and sensor interface P2, modulus
The analog input end of conversion chip U5 is connect with sensor interface P2, the digital output end of modulus conversion chip U5 and insertion
Decline controller U1 data collection terminal connection.
2. a kind of super low-power consumption data collection station based on MCU according to claim 1, it is characterised in that: described
USB interface includes USB chip USB1, resistance R3, resistance R5, resistance R6, Transient Suppression Diode TV3 and TV4, the electricity
The USB transmission interface connection corresponding with embedded microcontroller U1 of one end of one end and resistance R5 for hindering R3, the one of resistance R6
End and ground connection, the other end of resistance R3, one end of Transient Suppression Diode TV3 are connect with the pin 2 of USB chip USB1, electricity
One end of the other end, Transient Suppression Diode TV4 that hinder R5 is connect with the pin 3 of USB chip USB1, the other end of resistance R6
It is connect with the pin 4 of USB chip USB1, the other end of the other end of Transient Suppression Diode TV3, Transient Suppression Diode TV4
It is grounded.
3. a kind of super low-power consumption data collection station based on MCU according to claim 2, it is characterised in that: described
The CHRG pin of charging chip U4 detects interface CHRG_DET_O by the charging of resistance R30 and embedded microcontroller U1 and connects
It connects, the CHRG pin of charging chip U4 is directly connect with the charging of embedded microcontroller U1 detection interface CHRG_DET_I, is filled
The CHRG pin of electrical chip U4 connects digital circuit power source VCC by resistance R34；The VCC interface of the charging chip U4 is logical
It crosses resistance R28 to connect with the pin 1 of USB chip USB1, the VCC interface of charging chip U4 passes sequentially through resistance R28, resistance R26
It is connect afterwards with the base stage of NPN triode Q2, the VCC interface of charging chip U4 is grounded by capacitor C17, the base of NPN triode Q2
Pole is grounded by resistance R22, and the collector of NPN triode Q2 is connect by resistance R23 with the base stage of PNP triode Q3, NPN tri-
The collector of pole pipe Q1 is connect by resistance R16 with the base stage of PNP triode Q3, and multiple one end for manually controlling key lead to respectively
It crosses corresponding resistance to connect with the base stage of PNP triode Q3, the collector of NPN triode Q2 passes sequentially through resistance R23, resistance
It is connect after R25 with the emitter of PNP triode Q3, the base stage of NPN triode Q1 is connect with one end of resistance R17, and tri- pole NPN
The base stage of pipe Q1 is grounded by resistance R18, the other end of resistance R17 respectively with capacitor C9, capacitor C10, resistance R20 and LDO line
Property voltage stabilizing chip U3 power input connection, the other end ground connection of the other end of capacitor C9, capacitor C10, resistance R20's is another
End is grounded by resistance R21, and the other end of resistance R20 is connect with the U_DET pin of embedded microcontroller U1, and LDO is linear
The output end of voltage stabilizing chip U3, one end of capacitor C11, one end of capacitor C12, resistance R24 one end and digital circuit power source
VCC connection, the other end of capacitor C11, the other end of capacitor C12, resistance R27 one end be grounded, the other end of resistance R24,
One end of capacitor C13, one end of capacitor C14 are connect with analog circuit power supply AVCC, the other end of resistance R27, capacitor C13
The other end, capacitor C14 the other end be grounded, multiple other ends for manually controlling key pass through resistance R15 and are grounded.
4. a kind of super low-power consumption data collection station based on MCU according to claim 1, it is characterised in that: described
The signal condition and A/D converter circuit of sensor further include having resistance R29, resistance R37, Transient Suppression Diode TV1 and TV2, electricity
R31, resistance R35, capacitor C15, capacitor C16, capacitor C18, capacitor C19, resistance R32 and resistance R36 are hindered, sensor interface P2's
Pin 1 is connect with one end of resistance R37, the pin 2 of sensor interface P2, the other end of resistance R37, Transient Suppression Diode
One end of TV2 is connect with resistance R35, the other end ground connection of Transient Suppression Diode TV2, the other end and modulus of resistance R35
The analog input end AIN+ connection of conversion chip U5, and the other end of resistance R35 is grounded by capacitor C19, sensor interface
The pin 4 of P2 is connect with one end of resistance R29, and the pin 3 of sensor interface P2, the other end of resistance R29, transient state inhibit two poles
One end of pipe TV1 is connect with resistance R31, the other end ground connection of Transient Suppression Diode TV1, the other end and mould of resistance R31
Number conversion chip U5 the AIN- connection of analog input end, and the other end of resistance R31 pass sequentially through capacitor C18, capacitor C15 and
The REFOUT pin of modulus conversion chip U5 connects, and the VCC pin of modulus conversion chip U5 connects digital circuit power source VCC, mould
The VCC pin of number conversion chip U5 is grounded by capacitor C16, and the SCK pin of modulus conversion chip U5 passes through resistance R36 and insertion
Decline the pulse output pin connection of controller U1, the number of the SDO pin of modulus conversion chip U5 and embedded microcontroller U1
It is connected according to collection terminal.
5. a kind of super low-power consumption data collection station based on MCU according to claim 1, it is characterised in that: described
LCD display interface circuit is also connected on embedded microcontroller U1, the embedded microcontroller U1 is shown by LCD
Device interface circuit is connect with LCD display.
6. a kind of super low-power consumption data collection station based on MCU according to claim 1, it is characterised in that: described
Embedded microcontroller U1 selects the super low-power consumption MCU based on ARM Cortex core.
7. a kind of super low-power consumption data collection station based on MCU according to claim 1, it is characterised in that: described
Modulus conversion chip U5 selects 24 modulus conversion chips of sigma-delta type.
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