CN110888370A

CN110888370A - Micro-power consumption multifunctional integrated data acquisition unit

Info

Publication number: CN110888370A
Application number: CN201911244001.XA
Authority: CN
Inventors: 倪勇; 陈洁
Original assignee: Jiangsu Molit Technology Co Ltd
Current assignee: Jiangsu Molit Technology Co Ltd
Priority date: 2019-12-06
Filing date: 2019-12-06
Publication date: 2020-03-17

Abstract

The invention discloses a micro-power multifunctional integrated data acquisition unit in the field of civil engineering, aiming at measuring and acquiring bridge data more conveniently and timely. The internal structure of the acquisition unit is as follows: the micro-power consumption data acquisition unit cascades the analog signal expansion module and the RS485 signal expansion module through an IDC grey flat cable and an IDC socket, and charges the lithium battery through a 10W/18V solar panel; the micro-power consumption data acquisition unit switches the 4-20 mA signal conditioning module and the +/-10V voltage signal conditioning module through the signal switch to realize the function that one channel can measure various physical quantities; the RS485 protection circuit interface is communicated with the non-isolated RS485 internal interface of the micro-power consumption data acquisition unit through an RS485 signal common mode filter; the microcontroller is communicated with the cloud server through the full-isolation RS485 external interface and the DTU data transmission module.

Description

Micro-power consumption multifunctional integrated data acquisition unit

Technical Field

The invention relates to the field of civil engineering and discloses a micro-power-consumption multifunctional integrated data acquisition unit technology.

Background

At present, except for the condition that extra-long and large bridges need to be deployed and a health detection system is needed, a plurality of small and medium bridges need to be detected and protected, but because the small and medium bridges are numerous and widely distributed, the whole monitoring system cost is difficult to bear.

At present, collection equipment on the market has single function, large overall dimension, external power supply dispersion and overlarge distance of construction wiring, and a plurality of problems of difficult replacement and test of a data collection module are solved, so that the cost of a monitoring system is increased, and a large amount of human resources are wasted.

Disclosure of Invention

The invention aims to provide a micro-power multifunctional integrated data acquisition unit to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: a micro-power-consumption multifunctional data acquisition unit comprises a micro-power-consumption data acquisition unit, an analog signal expansion module, an RS485 signal expansion module, an IDC grey flat cable, an IDC socket, a lithium battery, a DTU data transmission module, a switching power supply, an antenna, a 10W/18V solar cell panel, a signal switch, a 4-20 mA signal conditioning module, a +/-10V voltage signal conditioning module, an instrumentation amplifier, an excitation module, a constant current source excitation module, a power frequency filter, an anti-aliasing filter, an analog-to-digital converter, a microcontroller, an RTC real-time clock, an EEPROM, an Ethernet interface, a USB interface, a fully-isolated RS485 external interface, a non-isolated RS485 internal interface, an I2C protection circuit, a power management module, a lithium battery management module, a power state monitoring module, an external power supply anti-surge interface, an anti-surge signal interface, an LED channel state indicator lamp, IO expander, multiplexer, external circuit protection interface, RS485 protection circuit interface, DC-DC isolation power supply. The micro-power consumption data acquisition unit cascades the analog signal expansion module and the RS485 signal expansion module through an IDC grey flat cable and an IDC socket, and charges the lithium battery through a 10W/18V solar panel; the micro-power consumption data acquisition unit switches the 4-20 mA signal conditioning module and the +/-10V voltage signal conditioning module through the signal switch to realize the function that one channel can measure various physical quantities; the RS485 protection circuit interface is communicated with the non-isolated RS485 internal interface of the micro-power consumption data acquisition unit through an RS485 signal common mode filter; the microcontroller is communicated with the cloud server through the full-isolation RS485 external interface and the DTU data transmission module.

As an optimization: the excitation module provides power for an external 4-20 mA type sensor, the signal conditioning module conditions the sensor through 4-20 mA, and the sensor is collected through the analog-to-digital converter.

As an optimization: the microcontroller realizes measurement of external voltage signals through the signal switch, performs voltage conversion through the internal +/-10V voltage signal conditioning module, and acquires the voltage signals through the analog-to-digital converter.

As an optimization: the vibrating wire sensor is connected with the instrument amplifier after being switched by the signal switch through the anti-surge signal interface, conditioned by the power frequency filter and the anti-aliasing filter and then sent to the analog-to-digital converter for collection.

As an optimization: and the microcontroller performs low-power consumption management on the external equipment through an electronic switch in the power management module.

Compared with the prior art, the invention has the beneficial effects that:

the problems that in the current engineering application, when different physical quantity monitoring objects are measured, the system is difficult to integrate, the system is complex and large in size, sensor integration of different manufacturers needs to be considered, the system is difficult to maintain, the cost is high and the like are solved. The system only needs one data acquisition unit, the measurement of various physical quantity sensors can be realized, meanwhile, the requirement on an external power supply is not high, the system is suitable for being applied to a scene that commercial power cannot be provided, the acquisition modules (analog signals and RS485 signals) of different types of physical quantities are integrated in one data acquisition unit, the integration level of the system is greatly improved, the cost (implementation and maintenance) is greatly reduced, meanwhile, each acquisition module can be mixed, the measurement of three physical quantity signals can be realized through configuration on the same channel of the analog signal acquisition module, the flexibility of the system is greatly improved, a reliable low-cost scheme is provided for realizing a light and small integrated system, and the market competitiveness and the applicability of the system are improved.

Drawings

FIG. 1 is a block diagram of a micro-power multifunctional data acquisition unit according to the present invention;

FIG. 2 is a block diagram of a micro-power data collector;

FIG. 3 is a block diagram of an analog signal expansion module;

FIG. 4 is a block diagram of an RS485 signal expansion module;

FIG. 5 shows a voltage signal measurement circuit inside the micro-power data collector;

FIG. 6 shows a 4-20 mA current signal measuring circuit inside the micro-power consumption data collector;

FIG. 7 is a DC-DC conversion circuit inside the micro-power consumption data collector;

FIG. 8 shows a circuit module for monitoring the power status inside the micro-power data collector;

fig. 9 an IO extender of the I2C interface of the analog signal extension module and the RS485 signal extension module;

FIG. 10 is an isolated power supply built into the RS485 signal expansion module;

FIG. 11 is an excitation module inside the micro-power consumption data collector;

fig. 12 is a schematic diagram of signal and ground loops of the micropower data collector and the analog signal expansion module;

fig. 13 is a schematic diagram of a signal and ground loop of the micro-power consumption data collector and the RS485 signal expansion module;

FIG. 14 is a logic block diagram of a low power consumption of the micro-power multifunctional integrated data acquisition unit.

In the figure: 1. a micro-power consumption data acquisition unit; 2. an analog signal expansion module; 3. an RS485 signal expansion module; 4. IDC gray flat cable; 5. an IDC jack; 6. a lithium battery; 7. a DTU data transmission module; 8. a switching power supply; 9. an antenna; 10. a 10W/18V solar panel; 11. a signal switch; 12. a 4-20 mA signal conditioning module; 13. a +/-10V voltage signal conditioning module; 14. an instrumentation amplifier; 15. an excitation module; 16. a constant current source excitation module; 17. a power frequency filter; 18. a low-pass filter; 19. an analog-to-digital converter; 20. a microcontroller; 21. an RTC real-time clock; 22. an EEPROM; 23. an Ethernet interface; 24. a USB interface; 25. a fully-isolated RS485 external interface; 26. a non-isolated RS485 internal interface; 27. I2C protection circuit; 28. a power management module; 29. a lithium battery management module; 30. a power state monitoring module; 31. an external power supply anti-surge interface; 32. a second lithium battery; 33. an IDC interface of the micro-power consumption data acquisition unit; 34. an analog signal expansion module IDC jack; 35. I2C protection circuit; 36. an LED channel status indicator light; 37. an IO expander; 38. a signal relay group; 39. an anti-surge signal interface; 40. an RS485 signal expansion module IDC socket; 41. I2C protection circuit; 42. an LED channel status indicator light; 43. an RS485 signal common mode filter; 44. an IO expander; 45. a multiplexer; 46. an external power protection interface; 47. an RS485 protection circuit interface; 48. a DC-DC isolated power supply.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1, a micro power consumption data collector 1, an analog signal expansion module 2, and an RS485 signal expansion module 3 are cascaded through an IDC socket 5 via an IDC gray-flat cable 4, and one system is composed of 1 micro power

consumption data collector

1 and 8 analog signal expansion modules 2 or RS485 signal expansion modules 3, wherein the analog signal expansion modules 2 and the RS485 signal expansion modules 3 can be overlapped in a mixed manner, but the total number of the modules cannot exceed 8, and meanwhile, the 8 modules set the address of the module via a three-position dial switch on each module. Three physical quantities of the analog signal expansion module 2 are as follows: the vibrating wire signal, the voltage signal and the 4-20 mA current signal realize the arbitrary configuration of the three signals through an internal signal switching circuit. The micro-power consumption data acquisition unit 1 performs data interaction with the DTU data transmission module 7 through the external RS485 interface 25, the DTU data transmission module is connected with the antenna 9 to better transmit data, the DTU data transmission module 7 performs data communication with the cloud service center through the 3G/4G wireless network, receives a control acquisition command from the cloud platform, and realizes remote online monitoring. The internal lithium battery 6 serves as a main energy supply part, and the solar cell panel 10 charges the lithium battery 6. The whole system realizes micro-power operation under the management of the micro-power data acquisition unit 1. The switching power supply 8 is provided as a backup power supply input in the case of mains supply.

Referring to fig. 2, a signal switch 11 is connected to a 4-20 mA signal conditioning module 12 and then connected to an analog-to-digital converter 19, the signal switch 11 is connected to a ± 10V voltage signal conditioning module 13 and then connected to the analog-to-digital converter 19, the signal switch 11 is connected to an instrumentation amplifier 14 and then connected to a power frequency filter 17 and then connected to a low pass filter 18, and finally connected to the analog-to-digital converter 19. The excitation module 15 and the constant current source excitation module 16 are respectively connected to the signal switch 11, the information transmitted to the analog-to-digital converter 19 is converted into digital quantity through processing and transmitted to the microcontroller 20, and the microcontroller 20 is respectively connected with the RTC real-time clock 21, the EEPROM22, the ethernet interface 23, the USB interface 24 and the full-isolation RS485 external interface 25. In addition, the non-isolated RS485 internal interface 26 is connected to the microcontroller 20 and then is connected to a micro power consumption data collector IDC interface 33, and the micro power consumption data collector IDC interface 33 is connected to the signal switch 11. The second lithium battery 32 is also connected to the I2C protection circuit 27, and the I2C protection circuit 27 is connected to the microcontroller 20. The 10W/18V solar panel 10 is connected to the lithium battery management module 29, and the lithium battery 32 is connected with the lithium battery management module 29. The lithium battery management module 29 is connected with the power management module 28, the external power supply anti-surge interface 31 is connected into the lithium battery management module 29, the external power supply anti-surge interface 31 is connected into the power state monitoring module 30, and the power state monitoring module 30 is connected into the analog-to-digital converter 19. When the whole system works in a scene with commercial power, the external power supply anti-surge interface 31 supplies power to the system, the internal lithium battery 6 is charged, and when the system is powered off accidentally, the system is automatically switched to the internal lithium battery 32 through the internal lithium battery management module 29 to supply power to the system. If the system working environment has no commercial power, the external power supply of the system is supplied by the 10W/18V solar panel 10.

Please refer to fig. 3, the IDC socket 34 of the analog signal expansion module is connected to the I2C protection circuit 35, the I2C protection circuit 35 is connected to the IO expander 37, the IO expander 37 is connected to the LED channel status indicator 36, the IO expander 37 is further connected to the signal relay group 38, the signal relay group 38 is further connected to the IDC socket 34 of the analog signal expansion module, and the anti-surge signal interface 39 is connected to the signal relay group 38. The signal relay group 38 is composed of a plurality of signal relays, and each signal relay corresponds to one sensor channel. The anti-surge signal interface 39 is composed of a two-stage surge protection circuit, which is generally a combination of GDT and TVS.

Please refer to fig. 4, the LED channel status indicator 42 is connected to the IO extender 44, the IO extender 44 is connected to the I2C protection circuit 41, the I2C protection circuit 41 is connected to the RS485 signal extension module IDC socket 40, the RS485 signal extension module IDC socket 40 is connected to the DC-DC isolation power supply 48, the DC-DC isolation power supply 48 is connected to the multiplexer 45, the multiplexer 45 is connected to the RS485 signal extension module IDC socket 40, the multiplexer 45 is connected to the RS485 protection circuit interface 47, the multiplexer 45 is connected to the external power protection interface 46, the multiplexer 45 is connected to the IO extender 44, and the RS485 signal common mode filter 43 is connected to the RS485 signal extension module IDC socket 40. The LED channel status indicator 42 is used for indicating the current display of information such as on, off, and operation mode of the channel sensor, as in the analog signal expansion module, and is distinguished by the cycle difference of the intermittent flashing of the LED lamp. The DC-DC isolation power supply 48 is used to provide an isolated power supply for the external RS485 type sensor.

The working principle of the invention is as follows:

the whole system consists of a micro-power consumption data collector, an analog signal expansion module and an RS485 signal expansion module, wherein the analog signal expansion module and the RS485 signal expansion module are used as data collection daughter boards, a power supply is uniformly provided by the micro-power consumption data collector, and meanwhile, the channel switching logic control of the two sub-modules of the analog signal expansion module and the RS485 signal expansion module is also carried out communication control through I2C of the micro-power consumption data collector.

Referring to fig. 5, the circuit for measuring voltage signals inside a micro-power consumption data collector connects resistors R23, R24, and R25 in parallel to a positive input terminal through an operational amplifier, and the positive input terminal is connected in parallel with a bidirectional transient suppression diode D4. The upper side and the lower side of the operational amplifier are connected with a voltage source. One end of the resistor R31 is grounded, the other end is connected with the resistor R32, and the other end of the resistor R32 is connected to the output end of the operational amplifier. The negative input end of the operational amplifier is connected between the resistor R31 and the resistor R32 to form a feedback loop. The circuit can measure the external +/-10V voltage signal range and condition the voltage signal range to be in a 0-5V range suitable for measurement of the analog-to-digital converter.

Please refer to fig. 6, which shows a 4-20 mA current signal measuring circuit inside the micro power consumption data collector. The diode D5, the diode D4 and the resistor R30 are connected in parallel to the positive input end of the operational amplifier, a voltage source is applied to the upper end and the lower end of the proportional amplifier, the resistor R33 and the resistor R35 are connected in parallel to the negative input end, one end of the resistor R34 is connected to the output end of the operational amplifier, and the other end of the resistor R34 is connected to the negative input end to form a feedback circuit. The circuit is used to convert the current signal to a range of voltage signals suitable for measurement by the analog to digital converter.

Please refer to fig. 7, which illustrates an internal DC-DC conversion circuit of the micro power consumption data collector. A DC-DC conversion circuit in the micro-power consumption data collector adopts a chip U20 with the model of LMR14006Y to carry out voltage reduction. The capacitor C72 and the capacitor C73 are connected in parallel to the resistor R72, signals at the other ends of the capacitor C72 and the capacitor C73 are grounded, meanwhile, the port of the resistor R72 is also connected with the No. 5 pin of the U20, and the other end of the resistor R72 is connected with the No. 4 pin of the U20. Pin No. 2 of U20 is signal ground. One end of the Schottky diode is connected with the signal ground, and the other end of the Schottky diode is connected with the pin No. 1 on the U20 in series with the capacitor C71. The resistor R74 is connected in series with the resistor R75, the capacitor C74, the capacitor C75, the capacitor C76 and the capacitor C77 are connected in parallel to one end of the inductor L2, and a voltage source is further applied to the circuit. The capacitors C74, C75, C76 and C77 are connected in series with the resistors R74 and R75, and the other end of the series branch is connected with the signal ground. Pin No. 3 of U20 is connected between resistor R74 and resistor R75. Pin 6 of U20 is connected to the other side of inductor L2 through between capacitor C71 and the schottky diode. The 4-20 mA current signal measuring circuit in the micro-power consumption data acquisition unit is used for converting an external 12V coarse power supply to obtain a 5V accurate power supply, and meanwhile, the DC-DC can ensure higher conversion efficiency.

Referring to fig. 8, a circuit module for monitoring the internal power state of a micro power consumption data collector is shown, wherein a capacitor C103 is added at two ends of a resistor R92, one end of the resistor R92 is grounded, the other end of the resistor R91 is connected to a resistor R90, the other end of the resistor R91 is connected to a positive input end of an operational amplifier, the circuit passes through a space between a diode D15 and a bidirectional transient suppression diode D16, voltage sources are connected at the upper and lower sides of the operational amplifier, an output end of the operational amplifier is connected to a negative input end of the operational amplifier to form feedback, an output end of the operational amplifier is further connected to a capacitor C104, and the other end of the capacitor C104 is grounded, the circuit module for monitoring the internal power state of the micro power consumption data collector is used for monitoring the power supply state of the system, and includes that no external power supply is provided and the internal power is low when the voltage of a BAT Vol pin voltage is less than 1.2V, ② indicates that the external power supply is provided but the power supply is sufficient when the voltage of the BAT Vol pin is greater than 2.2V, and ③ indicates.

Please refer to fig. 9, which illustrates an IO extender of the I2C interface of the analog signal extension module and the RS485 signal extension module. Three wires are drawn out from one side of the dial switch SW1 and are respectively connected with the resistors R49, R50 and R51, the other sides of the resistors R49, R50 and R51 are mutually connected and a voltage source is applied, and the signal of the other side of the dial switch is grounded. U5 is a chip with model number TCA9535PWR, and pins No. 2, No. 3 and No. 21 of U5 are respectively connected between resistors R49 and SW1, between resistors R50 and SW1 and between resistors R51 and SW 1. The VCC and GND pins on U5 are connected in parallel to two capacitors, C1 and C2 respectively. The pin No. 22 and the pin No. 23 of the U5 are respectively connected with a resistor R52 and a resistor R53. The IO expanders of the I2C interfaces of the analog signal expansion module and the RS485 signal expansion module are used for driving the LED channel state indicator lamp and controlling the opening and closing of the signal (analog and RS485) channel. And the dial switch is used for chip selection of the module addresses of each analog signal expansion module and each RS485 signal expansion module.

Please refer to fig. 10, which illustrates an isolated power supply built in the RS485 signal expansion module. For providing power to an external RS85 type sensor. RT1 and RT2 are self-recovery fuses for cutting off power supply in time when an external power supply is abnormally short-circuited, and for re-connecting the self-recovery fuses after the abnormality disappears.

Please refer to fig. 11, which is an excitation module inside the micro power consumption data collector, and has two functions, one is to provide an excitation voltage for measuring vibrating wire signals, and the other is to provide a power supply for measuring an external 4-20 mA type sensor.

Please refer to fig. 12, which is a schematic diagram of signal and ground loops of the micro power consumption data collector and the analog signal expansion module, for explaining an electrical connection relationship between a system ground (digital ground DGND), a protection ground, and a shielding ground of the system.

Please refer to fig. 13, which is a schematic diagram of a signal and ground loop of the micro power consumption data collector and the RS485 signal extension module, for explaining an electrical connection relationship between a system ground (digital ground DGND), a protection ground, and a shielding ground of the system.

Please refer to fig. 14, which is a logic block diagram of low power consumption of the micro-power multifunctional integrated data acquisition unit, showing which modules are powered off and which are powered on when the whole system is in low power consumption and normal mode operation. Switch in the figure represents an electronic Switch, and is controlled to be turned on and off by MCU logic signals. Each module identifies, in addition to the quiescent current and the load current, an estimate of the total power consumption of the system.

Micro-power consumption data acquisition unit: the microcontroller 20 employs an STM32F107 serial processor from ST corporation, with the capability of USB, ethernet interfaces. The analog-to-digital converter 19 adopts a 4-channel fully differential/8-channel single-ended, 250Ksps, 16bit type analog-to-digital converter of AD7689 series of ADI company, and has extremely low power consumption of 3.5 mW. The instrumentation amplifier 14 uses AD8422 from ADI corporation to achieve 100-fold gain amplification of the vibrating wire signal. The I2C protection circuit 27 is used to protect the I2C interface from damage during module plugging and unplugging by using a three-terminal filter and ESD protection period to constitute a protection circuit. The fully-isolated RS485 external interface 25 adopts an ADM2587 fully-isolated RS485 driver of ADI company, and an isolation power supply is integrated inside the fully-isolated RS485 external interface except for RS485 signal isolation, so that the configuration of an external isolation power supply is omitted, and the fully-isolated RS485 external interface is communicated with an external DTU or RS485 bus, so that the protection capability of the fully-isolated RS485 external interface is improved by using a fully-isolated model. The non-isolated RS485 internal interface 26 is an interface for communicating with the RS485 signal expansion module, and because the internal interface is not very high in protection capability requirement, and a full-isolation type interface is not necessary, an RS485 driver of an SN65HVD72 model of TI company is adopted. The power state monitoring module 30 is connected to the analog-to-digital converter through resistance voltage division, operational amplifier buffering and certain overvoltage protection measures, and judges the current system power supply operation condition of the system through monitoring voltage. If the electric quantity of the system is low or the external power supply is suddenly powered off, the system can report the corresponding power supply information to the cloud server as diagnosis information so as to timely send out early warning. The lithium battery management module 29 adopts a MAX1873 chip of meixin corporation to realize the charging management of the 7.4V lithium battery, the chip can receive the external direct current power supply provided by the switching power supply 8, and also can receive the external power supply provided by the 10W/18V solar cell panel 10, when the MAX1873 works in the low power consumption mode, the current consumption of the chip is less than 10uA, and the system is very suitable for the low power consumption requirement of the system.

The analog signal expansion module, the IO expander, uses TCA9535 of TI corporation, with 16-bit logical IO output, meaning that control of 16 channels is supported at maximum. The annunciator relay adopts an ohm dragon G6K series patch type signal relay.

The RS485 signal expansion module and the IO expander adopt TCA9535 of TI company, have 16-bit logic IO output, and mean that the control of 16 channels is supported at most. The multiplexer can adopt two ADGS5414 of ADI company, and each chip has 8-channel signal on-off control function. Because this veneer need provide the power to the outside, in order to improve the ability that the system protected outside anomaly, this power adopts the isolation power, and the model can select golden sun rise technology's WRB1212S model isolation power, realizes the power isolation of system side and external sensor side.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. A micro-power multifunctional integrated data acquisition unit is characterized in that: the micro-power consumption data acquisition device comprises a micro-power consumption data acquisition unit (1), an analog signal expansion module (2), an RS485 signal expansion module (3), an electric wire (9) and a 10W/18V solar panel (10), wherein the micro-power consumption data acquisition unit (1) is used for cascading the analog signal expansion module (2) and the RS485 signal expansion module (3) through an IDC grey flat cable (4) and an IDC socket (5), the 10W/18V solar panel (10) is connected with a lithium battery (6) for charging, and the electric wire (9) is electrically connected with a DTU data transmission module (7) and can remotely transmit data; the micro-power consumption data acquisition unit (1) is connected with the signal switch (11) to switch the 4-20 mA signal conditioning module (12) and the +/-10V voltage signal conditioning module (13), and the function that one channel can measure various physical quantities is achieved.

2. A micro-power multifunctional integrated data acquisition unit according to claim 1, comprising an excitation module (15), characterized in that: the excitation module (15) is connected with an external 4-20 mA type sensor, the excitation module (15) provides a power supply for the external 4-20 mA type sensor, the excitation module (15) is connected with a 4-20 mA signal conditioning module (12) for conditioning, and then is connected with an analog-to-digital converter (19) for collection.

3. A micro-power multifunctional integrated data acquisition unit according to claim 1, comprising a microcontroller (20) characterized in that: the microcontroller (20) is connected with the signal switch (11) to realize measurement of external voltage signals, voltage conversion is carried out by connecting the internal +/-10V voltage signal conditioning module (13), and acquisition is carried out by the analog-to-digital converter (19).

4. The micro-power multifunctional integrated data acquisition unit according to claim 1, comprising a vibrating wire sensor connected with an anti-surge signal interface (39), characterized in that: the vibrating wire sensor is connected with an anti-surge signal interface (39), is connected with an instrument amplifier (14) after being switched by a signal switch (11), is conditioned by a power frequency filter (17) and an anti-aliasing filter (18), and is sent to an analog-to-digital converter (19) for collection.

5. The micro-power multifunctional integrated data acquisition unit according to claim 1, characterized in that: and the microcontroller (20) is connected with an electronic switch in the power management module (28) to perform low-power consumption management on the peripheral equipment.