CN217085299U - Meteorological data acquisition device - Google Patents
Meteorological data acquisition device Download PDFInfo
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- CN217085299U CN217085299U CN202122972706.2U CN202122972706U CN217085299U CN 217085299 U CN217085299 U CN 217085299U CN 202122972706 U CN202122972706 U CN 202122972706U CN 217085299 U CN217085299 U CN 217085299U
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Abstract
The utility model discloses a meteorological data acquisition device, include: the control chip, the digital signal shaping input module, the analog-to-digital conversion module and the communication module which are connected with the control chip, and the communication lightning protection module which is connected with the communication module; the digital signal shaping input module comprises a multi-path pulse frequency input interface shaping processing circuit and a multi-path digital I/O input interface shaping processing circuit. The utility model discloses a modularization, the design of integrating avoids the interference between the module, has still increased the lightning protection measure simultaneously, has ensured stability, the reliability of system, has improved the anti-interference and anti thunderbolt's of system ability, very big promotion meteorological data acquisition's stability and accuracy nature.
Description
Technical Field
The utility model relates to a meteorological observation field especially relates to a meteorological data acquisition device.
Background
The meteorological data acquisition device is the most important component in the meteorological data acquisition system, the stability and the accuracy of meteorological data acquisition are closely related with the performance and the security of meteorological data acquisition device, many meteorological data acquisition equipment at present adopt the general type imported product of last century development, some functions have not had the data acquisition effect yet, nevertheless still work, cause the interference to required data acquisition easily, and circuit design does not take lightning protection measure, use easily and receive the thunderbolt damage under outdoor environment, it has unstability, inaccurate problem to lead to meteorological data acquisition easily when using present meteorological data acquisition device to meteorological data acquisition.
SUMMERY OF THE UTILITY MODEL
The utility model provides a meteorological data acquisition device for there is unstable, coarse problem when solving present meteorological data acquisition device and carrying out meteorological data collection.
In order to achieve the above object, the utility model provides a meteorological data acquisition device, include: the control chip, the digital signal shaping input module, the analog-to-digital conversion module and the communication module which are connected with the control chip, and the communication lightning protection module which is connected with the communication module; the digital signal shaping input module comprises a multi-path pulse frequency input interface shaping processing circuit and a multi-path digital I/O input interface shaping processing circuit.
Preferably, the method further comprises the following steps: the sensor correction value storage module is connected with the control chip; the shaping processing circuit of the multi-path pulse frequency input interface is used for connecting a rainfall and wind speed acquisition sensor; the multi-path digital I/O input interface shaping processing circuit is used for connecting the wind direction Gray code sensor; the analog-to-digital conversion module is used for connecting the temperature sensor and the temperature and humidity sensor.
Preferably, the analog-to-digital conversion module comprises a plurality of analog differential signal processing circuits and a programmable instrument linear amplification and A/D analog-to-digital conversion circuit, the input ends of the analog differential signal processing circuits are connected with the corresponding temperature sensor and the temperature and humidity sensor, the output ends of the analog differential signal processing circuits are sequentially connected with the programmable instrument linear amplification and A/D analog-to-digital conversion circuit, and the output ends of the programmable instrument linear amplification and A/D analog-to-digital conversion circuit are connected with the control chip.
Preferably, the programmable meter linear amplification and A/D analog-to-digital conversion circuit comprises a meter linear amplifier, a multipath non-inverting amplifier, a 2-1 converter, an emitter follower and an A/D converter which are connected in sequence.
Preferably, the digital signal shaping input module comprises a plurality of digital interface circuits, each digital interface circuit has the same circuit structure and comprises a diode D1, a first resistor R1 and a dual-time-base integrated circuit U1, the cathode of the diode D1 is connected with the digital signal acquisition circuit, the anode of the diode D1 is connected with one end of the first resistor R1, the common end of the diode D1 is connected with the input end of the dual-time-base integrated circuit U1, the other end of the first resistor R1 is connected with the first output end of the system power supply module, and the output end of the dual-time-base integrated circuit U1 is connected with one port of the control chip.
Preferably, the power supply system further comprises a system power supply module for supplying power to the components, wherein the system power supply module comprises a lightning protection input circuit, a first power chip U3, a first voltage conversion chip U4, a second power chip U5, a second voltage conversion chip U6, a first voltage stabilization chip U7, a second voltage stabilization chip U8, a third voltage stabilization chip U9 and a fourth voltage stabilization chip U10, one end of the lightning protection input circuit is connected with an external power supply, the other end of the lightning protection input circuit is connected with the input end of the first power chip U3, the output end of the first power chip U3 outputs +5V voltage and is simultaneously connected with a digital signal shaping input module, a constant current source module, a system work indicator light module, the input end of the first voltage conversion chip U4 and the input end of the second power chip U5, the output end of the first voltage conversion chip U4 outputs-5V voltage and is simultaneously connected with an analog-to-digital conversion module, the output end of the second power chip U5 outputs +12V voltage and is simultaneously connected with the input end of the second voltage conversion chip U6 The output end of the second voltage conversion chip U6 is connected with the input end of the second voltage stabilization chip U8, the output end of the first voltage stabilization chip U7 outputs +9V voltage and is simultaneously connected with the input end of the third voltage stabilization chip U9, the output end of the second voltage stabilization chip U8 outputs-9V voltage and is simultaneously connected with the input end of the fourth voltage stabilization chip U10, the output end of the third voltage stabilization chip U9 outputs +5V voltage, and the output end of the fourth voltage stabilization chip U10 outputs-5V voltage.
Preferably, the programmable instrument linear amplification and a/D analog-to-digital conversion module is further connected with a constant current source module, the constant current source module is connected with a temperature sensing device, the constant current source module includes a second resistor R2, a third resistor R3, a first operational amplifier U2 and a conducting switch Q1, one end of the second resistor R2 is connected with the programmable instrument linear amplification and a/D analog-to-digital conversion module, the other end of the second resistor R2 is connected with one end of the temperature sensing device, the other end of the temperature sensing device is connected with an input end of the conducting switch Q1, a control end of the conducting switch Q1 is connected with a first end of the first operational amplifier U2, an output end of the conducting switch Q1 is connected with a second end of the first operational amplifier U1, a common end of the first resistor R3 is connected, a third end of the first operational amplifier U2 is connected with a first output end of the system power supply module, and the other end of the third resistor R3 is grounded.
The utility model discloses following beneficial effect has: the utility model provides a meteorological data acquisition device adopts the modularization, integrates the design, avoids the interference between the module, has still increased the lightning protection and has hit the measure simultaneously, has ensured stability, the reliability of system, has improved the anti-interference and anti thunderbolt's of system ability, very big promotion meteorological data acquisition's stability and accuracy nature.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification. In the drawings:
fig. 1 is a schematic diagram of an overall structure of a meteorological data acquisition device according to a preferred embodiment of the present invention;
fig. 2 is a schematic circuit diagram of a digital signal shaping input module of a meteorological data acquisition device according to a preferred embodiment of the present invention;
fig. 3 is a schematic diagram of a circuit structure of an analog-to-digital conversion module of a meteorological data acquisition device according to a preferred embodiment of the present invention;
fig. 4 is a schematic circuit diagram of a constant current source module of a meteorological data acquisition device according to a preferred embodiment of the present invention;
FIG. 5 is a schematic diagram of a system power module of a meteorological data acquisition device according to a preferred embodiment of the present invention;
fig. 6 is a schematic circuit diagram of an indicator light module of a meteorological data acquisition device according to a preferred embodiment of the present invention.
Detailed Description
The embodiments of the invention will be described in detail below with reference to the drawings, but the invention can be implemented in many different ways as defined and covered by the claims.
As shown in fig. 1 to 6, the present embodiment provides a meteorological data acquisition apparatus, including: meteorological data acquisition device includes: the control chip, the digital signal shaping input module, the analog-to-digital conversion module and the communication module which are connected with the control chip, and the communication lightning protection module which is connected with the communication module; the digital signal shaping input module comprises a multi-path pulse frequency input interface shaping processing circuit and a multi-path digital I/O input interface shaping processing circuit. In this embodiment, meteorological data acquisition device still includes: the sensor correction value storage module is connected with the control chip; the shaping processing circuit of the multi-path pulse frequency input interface is used for connecting a rainfall and wind speed acquisition sensor; the multi-path digital I/O input interface shaping processing circuit is used for connecting the wind direction Gray code sensor; the analog-to-digital conversion module is used for connecting the temperature sensor and the temperature and humidity sensor.
In this embodiment, the control chip may be any control chip having a logic operation function and an I/O interface, such as MCU, CPU, FPGA, and the like, and the control chip of this embodiment is described by taking CPU as an example; the communication module specifically adopts a 485 communication module, and in other embodiments, modules with communication functions, such as a serial port module and a 432 communication module, can also be adopted; the digital signal acquisition circuit is specifically a 12-channel digital I/O input interface shaping processing module, and in other embodiments, a digital I/O input interface shaping processing module with any channel number can be adopted; the pulse frequency input interface shaping module is specifically a 4-path pulse frequency input interface shaping module, and in other embodiments, a pulse frequency input interface shaping module with any number of channels can be adopted; the digital signal acquisition circuit comprises a digital sensor and is used for acquiring digital signals, and the analog signal acquisition circuit comprises an analog sensor and is used for acquiring analog signals; the sensor correction value storage module specifically adopts an EEPROM chip, can retain data for a long time without an additional battery, supports online modification and real-time correction, and is convenient for users to use.
The analog-to-digital conversion module comprises an analog differential signal processing circuit and a programmable instrument linear amplification and A/D analog-to-digital conversion circuit, wherein the input end of the analog differential signal processing circuit is connected with an analog signal acquisition circuit, the output end of the analog differential signal processing circuit is connected with the input end of the programmable instrument linear amplification and A/D analog-to-digital conversion circuit, the input end of the programmable instrument linear amplification and A/D analog-to-digital conversion circuit is also connected with the analog signal acquisition circuit, and the output end of the programmable instrument linear amplification and A/D analog-to-digital conversion circuit is connected with a CPU.
Specifically, the analog differential signal processing circuit comprises a MAX399EPA chip, the programmable instrument linear amplification and A/D analog-to-digital conversion circuit comprises an instrument linear amplifier, a non-inverting amplifier, a 2-1 converter, an emitter follower, an A/D converter and a singlechip, wherein the instrument linear amplifier is specifically a 1 instrument linear amplifier composed of three MAX432EPA chips, the in-phase amplifier is specifically a 16-path in-phase amplifier composed of MAX432EPA, the 2-1 converter is specifically a MAX 4544EPA chip, the emitter follower is specifically a MAX432EPA chip, the A/D converter is specifically a 16-bit A/D converter composed of MAX 195AEDE chips, the single chip is specifically an 8-bit single chip microcomputer of AT89C52, in other embodiments, the functions of this embodiment can be achieved by using chips of other models, and the specific model of this embodiment cannot be understood as a limitation to the present invention; the input end of the MAX399EPA chip is connected with an analog signal acquisition circuit, the control end of the MAX399EPA chip is connected with a P2.6 port and a P2.7 port of a control chip, the output end of the MAX399EPA chip is connected with the input end of an instrument linear amplifier, the output end of the instrument linear amplifier is connected with the input end of a non-inverting amplifier and the first input end of a 2-1 converter, the output end of the non-inverting amplifier is connected with the second input end of the 2-1 converter, the control end of the 2-1 converter is connected with a P2.3 port of the control chip, the output end of the 2-1 converter is connected with the input end of an emitter follower, the output end of the emitter follower is connected with the input end of an A/D converter, the power supply end of the A/D converter is connected with a system power supply module after passing through MAX 6350EPA, the output end of the A/D converter is connected with a single chip, and the single chip is also connected with a P3.6 port of the control chip, the single chip microcomputer is also connected with a MAX 485ESA chip.
In the embodiment, 4 groups of analog differential high-resistance input channels are designed in the A/D conversion channel, two groups of high-precision fixed gain amplifiers are arranged in the A/D conversion channel, and the high-precision 16-bit A/D converter is combined to accurately convert analog voltage in any range, so that the conversion precision can reach 0.1% even if weak voltage of 0-25 mV is used.
Specifically, the programmable instrument linear amplification and a/D analog-to-digital conversion module is further connected with a constant current source module, the constant current source module is connected with a temperature sensing device, the constant current source module comprises a second resistor R2, a third resistor R3, a first operational amplifier U2 and a conducting switch Q1, one end of the second resistor R2 is connected with the programmable instrument linear amplification and a/D analog-to-digital conversion module, the other end of the second resistor R2 is connected with one end of the temperature sensing device, the other end of the temperature sensing device is connected with the input end of the conducting switch Q1, the control end of the conducting switch Q1 is connected with the first end of the first operational amplifier U2, the output end of the conducting switch Q1 is connected with the second end of the first operational amplifier U1, the common end is connected with one end of the third resistor R3, the third end of the first operational amplifier U2 is connected with the first output end of the system power supply module, and the other end of the third resistor R3 is grounded.
The on-switch Q1 in this embodiment can be field effect transistor, triode or IGBT, the on-switch Q1 of this embodiment explains with the field effect transistor as an example, MAX432EPA is chooseed for use to the first operational amplifier U2 of this embodiment, of course, choose the function that operational amplifier of other arbitrary signals also can this embodiment, it is not right that this embodiment explains with MAX432EPA as an example the utility model discloses form the restriction, the second resistance R2 of 1K resistance has been selected for use in this embodiment, and the third resistance R3 of 2K resistance, be used for realizing the circuit function to the resistance of selecting for use which kind of resistance, be the common general knowledge in this field, the resistance size of selecting for use in this embodiment is not right the utility model discloses form the restriction. In the present embodiment, the constant current source module utilizes the negative feedback of the operational amplifier and the virtual ground principle, so that the voltage applied by the third resistor R3 whose lower end controls the size of the constant current source module is constant, and therefore the drain current I of the field effect transistor is 5V/2K 2.5 mA. Since the gate resistance of the fet is infinite, the gate current is 0, so the source current is equal to the drain current and is constant, and the second resistor E2 is mainly used to reduce the common mode voltage of the temperature resistive load, so as to meet the requirement of the first operational amplifier U2 for normal operation.
Specifically, the digital signal shaping input module includes 12 digital interface circuits, each digital interface circuit has the same circuit structure, the present embodiment is described by taking a digital interface circuit connected to a P0.0 port of a CPU as an example, each digital interface circuit includes a diode D1, a first resistor R1, and a dual-time-base integrated circuit U1, a cathode of the diode D1 is connected to the digital signal acquisition circuit, an anode of the diode D1 is connected to one end of the first resistor R1, a common end of the diode D1 is connected to an input end of the dual-time-base integrated circuit U1, the other end of the first resistor R1 is connected to a first output end of the system power supply module, and an output end of the dual-time-base integrated circuit U1 is connected to one port of the CPU.
In this embodiment, the first resistor R1 is a pull-up resistor, the diode D1 is used to prevent signal fluctuation of the digital signal acquisition circuit from affecting the dual-time-base integrated circuit U1, the dual-time-base integrated circuit U1 specifically uses an NE556 chip, and the digital interface circuit uses the NE556 chip to perform pulse line shaping, so as to increase the interference rejection capability of the interface.
Specifically, the present embodiment further includes a system power module for supplying power to each component, where the system power module includes a lightning protection input circuit, a first power chip U3, a first voltage conversion chip U4, a second power chip U5, a second voltage conversion chip U6, a first voltage stabilization chip U7, a second voltage stabilization chip U8, a third voltage stabilization chip U9, and a fourth voltage stabilization chip U10, where a specific model of the first power chip U3 is MAX744AEPA, a model of the first voltage conversion chip U4 is ICL7662EPA, a model of the second power chip U5 is MAX 761EPA, a model of the second voltage conversion chip U6 is ICL7662EPA, a model of the first voltage stabilization chip U7 is 78L09, a model of the second voltage stabilization chip U8 is 79L09, a model of the third voltage stabilization chip U9 is ICL L, a model of the fourth voltage stabilization chip U5853 is 78L09, a model of the second voltage stabilization chip U8 is 79L09, and the system power module may also adopt other models that affect the functions of the current chip U867-LM L, the chip type number of the present embodiment does not limit the present invention, one end of the lightning protection input circuit is connected to an external power source, the other end of the lightning protection input circuit is connected to the input end of the first power chip U3, the output end of the first power chip U3 outputs +5V voltage and is simultaneously connected to the digital signal shaping input module, the constant current source module, the system operation indicator lamp module, the input end of the first voltage conversion chip U4 and the input end of the second power chip U5, the output end of the first voltage conversion chip U4 outputs-5V voltage and is simultaneously connected to the analog-to-digital conversion module, the output end of the second power chip U5 outputs +12V voltage and is simultaneously connected to the input end of the second voltage conversion chip U6 and the input end of the first voltage stabilization chip U7, the output end of the second voltage conversion chip U6 is connected to the input end of the second voltage stabilization chip U8, the output end of the first voltage stabilization chip U7 outputs +9V voltage and is simultaneously connected to the input end of the third voltage stabilization chip U9, the output end of the second voltage stabilization chip U8 outputs-9V voltage and is simultaneously connected with the input end of the fourth voltage stabilization chip U10, the output end of the third voltage stabilization chip U9 outputs +5V voltage, and the output end of the fourth voltage stabilization chip U10 outputs-5V voltage.
The implementation is isolated and connected with an external power supply through a lightning protection input circuit, when the external power supply is struck by lightning or has a fault accident, the influence on a post-stage circuit of a system power supply module is avoided, the external power supply is isolated and input to a first power supply chip U3 through the lightning protection input circuit, and is processed by a first power supply chip U3 to output a +5V digital voltage which is used for supplying power to a digital signal circuit, a 5V digital signal sensor and an A/D converter digital positive power supply and is simultaneously output to a first voltage conversion chip U4 and a second power supply chip U5, the first voltage conversion chip U4 converts the +5V digital voltage into a-5V digital voltage which is output and used for supplying power to an A/D converter digital negative power supply, the second power supply chip U5 boosts the +5V digital voltage into a +12V voltage which is output and supplies power to a 12V digital sensor and a 12V analog sensor, the voltage is simultaneously output to a second voltage conversion chip U6 and a first voltage stabilization chip U7, the second voltage conversion chip U6 converts positive 12V voltage into-12V voltage and outputs the voltage to a second voltage stabilization chip U8, the first voltage stabilization chip U7 converts the 12V voltage into +9V analog voltage and outputs the voltage to supply power for an analog signal circuit and outputs the voltage to a third voltage stabilization chip U9, the second voltage stabilization chip U8 converts the-12V voltage into-9V analog voltage and outputs the voltage to supply power for an analog circuit and outputs the voltage to a fourth voltage stabilization chip U10, the third voltage stabilization chip U9 converts the +9V analog voltage into +5V analog voltage and outputs the voltage to supply power for an A/D converter, and the fourth voltage stabilization chip U10 converts the-9V analog voltage into-5V analog voltage and outputs the voltage to supply power for the A/D converter. It should be noted that the specific voltage value used in this embodiment is for facilitating understanding, in other embodiments, other chips and/or different connection manners are used, the functions of voltage conversion and lifting can also be implemented, and different voltage values can be set according to actual requirements, and the specific voltage value used in this embodiment should not be construed as a limitation to the present invention.
Specifically, the system operation indicator lamp module comprises a fourth resistor R4 and a light emitting diode D2, wherein one end of the fourth resistor R4 is connected to the P3.7 port of the CPU, the other end of the fourth resistor R4 is connected to the cathode of the light emitting diode D2, and the anode of the light emitting diode D2 is connected to the +5V digital voltage output end of the system power supply module.
In this embodiment, when the P3.7 port of the CPU outputs a low level, the light emitting diode D2 is turned on to emit light, and when the P3.7 port of the CPU outputs a high level, the light emitting diode D2 is turned off to emit no light, and the level output by the P3.7 port of the CPU is controlled by a software program, so that the indicator light can be turned on and off constantly or flickered at a certain frequency to indicate what state the meteorological data acquisition device is in.
The digital interface of the meteorological data acquisition device of the embodiment adopts a double-time-base circuit to perform pulse line adjustment, so that the anti-interference capability of the interface is improved; the analog interface adopts a special interface conversion circuit with high conduction performance, high switching speed and good consistency, an internal integrated programmable gain instrument amplification circuit is adopted, and a high-precision 16-bit A/D conversion circuit is matched, so that the acquisition precision of the analog sensor is ensured, the storage of the correction value of the sensor is designed by using an EEPROM chip, data can be retained for a long time without an additional battery, online modification is supported, real-time correction is carried out, and the use by a user is facilitated; considering that the system is easy to be struck by lightning when long-distance power supply and data transmission are carried out, a lightning protection design circuit is additionally arranged at the input end of the power supply module and the output end of the 485 communication module, so that the system can be ensured to normally work in a severe environment; many devices, especially resistance-capacitance devices are reduced, and the reliability and the maintainability of the whole machine are improved. The mechanical potentiometer is cancelled, so that the shock resistance of the whole machine is improved, and the system drift is reduced. And the mainstream devices in the market are adopted, so that convenience is brought to production and maintenance.
To sum up, the utility model discloses a meteorological data acquisition device adopts the modularization, integrates the design to take jam-proof and lightning protection measure, ensured stability, the reliability of system, improved the anti-interference and anti thunderbolt's of system ability, very big promotion meteorological data acquisition's stability and accuracy nature.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. A meteorological data acquisition device, comprising: the device comprises a control chip, a digital signal shaping input module, an analog-to-digital conversion module and a communication module which are connected with the control chip, and a communication lightning protection module connected with the communication module;
the digital signal shaping input module comprises a multi-channel pulse frequency input interface shaping processing circuit and a multi-channel digital I/O input interface shaping processing circuit.
2. The meteorological data acquisition apparatus of claim 1, further comprising: the sensor correction value storage module is connected with the control chip; the shaping processing circuit of the multi-path pulse frequency input interface is used for connecting a rainfall and wind speed acquisition sensor; the multi-path digital I/O input interface shaping processing circuit is used for connecting a wind direction Gray code sensor; the analog-to-digital conversion module is used for connecting a temperature sensor and a temperature and humidity sensor.
3. The meteorological data acquisition device of claim 2, wherein the analog-to-digital conversion module comprises a plurality of analog differential signal processing circuits, a programmable meter linear amplification and A/D analog-to-digital conversion circuit, the input ends of the analog differential signal processing circuits are connected with corresponding temperature sensors and temperature and humidity sensors, the output ends of the analog differential signal processing circuits are sequentially connected with the programmable meter linear amplification and A/D analog-to-digital conversion circuit, and the output ends of the programmable meter linear amplification and A/D analog-to-digital conversion circuit are connected with the control chip.
4. The meteorological data acquisition device of claim 3, wherein the programmable instrument linear amplification and A/D conversion circuit comprises an instrument linear amplifier, a multi-path non-inverting amplifier, a 2-1 converter, an emitter follower and an A/D converter which are connected in sequence.
5. The meteorological data acquisition device according to claim 2, wherein the digital signal shaping input module comprises a plurality of digital interface circuits, each digital interface circuit has the same circuit structure and comprises a diode D1, a first resistor R1 and a dual time-based integrated circuit U1, a cathode of the diode D1 is connected with the digital signal acquisition circuit, an anode of the diode D1 is connected with one end of the first resistor R1, a common end of the diode D1 is connected with an input end of the dual time-based integrated circuit U1, the other end of the first resistor R1 is connected with a first output end of a system power module, and an output end of the dual time-based integrated circuit U1 is connected with one port of the control chip.
6. The meteorological data acquisition device according to claim 1, further comprising a system power module for supplying power to the components, wherein the system power module comprises a lightning protection input circuit, a first power chip U3, a first voltage conversion chip U4, a second power chip U5, a second voltage conversion chip U6, a first voltage stabilization chip U7, a second voltage stabilization chip U8, a third voltage stabilization chip U9 and a fourth voltage stabilization chip U10, one end of the lightning protection input circuit is connected with an external power supply, the other end of the lightning protection input circuit is connected with an input end of the first power chip U3, an output end of the first power chip U3 outputs +5V voltage and is simultaneously connected with a digital signal shaping input module, a constant current source module, a system operation indicator light module, an input end of the first voltage conversion chip U4 and an input end of the second power chip U5, an output end of the first voltage conversion chip U4 outputs-5V voltage and is simultaneously connected with an analog-to-digital conversion module The block, second power chip U5's output +12V voltage and connect simultaneously second voltage conversion chip U6's input with first regulator chip U7's input, second voltage conversion chip U6's output is connected second regulator chip U8's input, first regulator chip U7's output +9V voltage and connect simultaneously third regulator chip U9's input, second regulator chip U8's output-9V voltage and connect simultaneously fourth regulator chip U10's input, third regulator chip U9's output +5V voltage, fourth regulator chip U10's output-5V voltage.
7. The meteorological data acquisition device of claim 3, wherein the programmable meter linear amplification and A/D analog-to-digital conversion module is further connected with a constant current source module, the constant current source module is connected with a temperature sensing device, the constant current source module comprises a second resistor R2, a third resistor R3, a first operational amplifier U2 and a conducting switch Q1, one end of the second resistor R2 is connected with the programmable meter linear amplification and A/D analog-to-digital conversion module, the other end of the second resistor R2 is connected with one end of the temperature sensing device, the other end of the temperature sensing device is connected with an input end of the conducting switch Q1, a control end of the conducting switch Q1 is connected with a first end of the first operational amplifier U2, an output end of the conducting switch Q1 is connected with a second end of the first operational amplifier U1, and a common end is connected with one end of the third resistor R3, the third end of the first operational amplifier U2 is connected with the first output end of the system power supply module, and the other end of the third resistor R3 is grounded.
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Address after: Room 1801, 18th floor, building 1, yard 1, No. 81, Beiqing Road, Haidian District, Beijing 100094 Patentee after: Zhongkexing Tuwei Tianxin Technology Co.,Ltd. Address before: Room 1801, 18 / F, building 1, yard 1, No. 81 Beiqing Road, Haidian District, Beijing 100085 Patentee before: Zhongkexing Tuwei Tianxin (Beijing) Technology Co.,Ltd. |