Meteorological monitoring data acquisition circuit

Abstract

The utility model discloses a meteorological monitoring data acquisition circuit, which mainly solves the problems that the existing ponding alarm device is generally large in size and high in energy consumption and cannot meet the requirement of low-power-consumption operation. The acquisition circuit comprises an analog-to-digital converter connected with an external sensor, a pulse signal conditioning circuit, a pulse signal detection circuit and a single-chip microcomputer control chip which are sequentially connected with the analog-to-digital converter, and a power supply circuit and an early warning starting circuit which are connected with the single-chip microcomputer control chip. According to the utility model, through components such as the analog-to-digital converter, the pulse signal conditioning circuit, the pulse signal detection circuit and the single-chip microcomputer control chip, acquisition, processing and transmission of meteorological data such as ponding are realized. The circuit has the advantages of being small in size, low in energy consumption and the like, compared with an existing ponding alarm device, the circuit can more effectively meet the requirement for low-power-consumption operation, and a more convenient and reliable solution is provided for safety monitoring of a subway station.

Description

TECHNICAL FIELD

[0001] The utility model belongs to electronic circuit technical field, specifically, it is related to a meteorological monitoring data acquisition circuit. BACKGROUND

[0002] Most of the subway stations are located in underground space, and the terrain is relatively low. During flood season or water pipe burst, water accumulation is easy to occur. Some equipment rooms and areas not used in new line construction are often unattended, and there are safety hazards during the interval of patrol. In order to solve this problem, a portable water accumulation alarm device is developed.

[0003] The meteorological monitoring system of the station sets monitoring points in the key parts of the station hall prone to water accumulation and backflow in the flood prevention key station. The system continuously collects outdoor weather data, rainfall data and water accumulation data through sensors, wireless communication, camera monitoring and solar power supply technology and uploads them in real time. Among them, the monitoring point equipment is mainly used to collect water accumulation data of key low-lying parts and upload them to the outdoor host; the outdoor host is used to collect meteorological data such as rainfall, temperature and humidity, wind speed, and after packaging with the water accumulation data, the data is uploaded to the control room monitoring terminal through the wireless communication network to realize the local display of all monitoring data; at the same time, the monitoring terminal forwards the received data to the cloud platform through the GPRS network to realize real-time data storage.

[0004] The current flood prevention monitoring method mainly relies on manual patrol, which has the problems of low efficiency and slow response. Although some stations are equipped with meteorological monitoring systems, most of these systems are limited to collecting meteorological data, and the monitoring of water accumulation data is relatively insufficient. The existing water accumulation alarm device generally has large volume and high energy consumption, which cannot meet the low-power operation requirement. UTILITY MODEL CONTENT

[0005] The utility model aims at providing a meteorological monitoring data acquisition circuit, which mainly solves the problem that the existing water accumulation alarm device generally has large volume and high energy consumption, which cannot meet the low-power operation requirement.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0007] A meteorological monitoring data acquisition circuit, comprising an analog-to-digital converter connected with an external sensor, a pulse signal conditioning circuit, a pulse signal detection circuit and a single-chip microcomputer control chip connected with the analog-to-digital converter in sequence, and a power supply circuit and a pre-warning starting circuit connected with the single-chip microcomputer control chip; wherein the power supply circuit is also connected with the pre-warning starting circuit and the pulse signal detection circuit.

[0008] Further, in the utility model, the pulse signal conditioning circuit includes resistance R1, capacitor C1 connected with analog-digital converter after parallel connection, operational amplifier A1 connected with resistance R1, capacitor C1 after parallel connection at the other end of positive phase input end, resistance R2, capacitor C2 connected with the positive phase input end of operational amplifier A1 at one end and the output end of operational amplifier A1 at the other end, resistance R3 connected with the inverting input end of operational amplifier A1 at one end and grounded at the other end, potentiometer VR1 connected with the inverting input end of operational amplifier A1 at fixed end, resistance R4 connected with the sliding end of potentiometer VR1 and the other fixed end at one end and the output end of operational amplifier A1 at the other end, and diode D1, D2 connected with the sliding end of potentiometer VR1 at one end after positive and negative pole reverse parallel connection and connected with the output end of operational amplifier A1 at the other end after parallel connection

[0009] Further, in the utility model, the pulse signal detection circuit includes resistance R5, R6, R7 connected in turn in series, resistance R8 connected in parallel at both ends of resistance R5, R6, R7 in series, diode D3, D4 connected with the positive pole and resistance R6, R7 connection end after sequential connection in series and connected with the negative pole and R5, R6 connection end, comparator A2 connected with the negative pole of diode D3 at negative pole input end and connected with the negative pole of diode D4 at output end, comparator A3 connected with the common end of resistance R8, resistance R7 at negative pole input end, resistance R9, R12, capacitor C3 connected with the negative pole input end of comparator A3, resistance R10, R11 connected with the other end of resistance R9, resistance R12, capacitor C4 connected with the other end of resistance R12, and resistance R13 connected with the other end of capacitor C3, C4 and the output end of comparator A6;Among them, the other end of resistance R10, R11 is connected with power supply circuit;The positive pole input end of comparator A5 is connected with the output end of operational amplifier A1, and the positive pole input end of comparator A6 is connected with 3.3V voltage source.

[0010] Further, in the utility model, the power supply circuit includes sampling module connected with single-chip microcomputer control chip, charging module connected with sampling module, 12V lithium battery group and overvoltage and undervoltage protector, DC12V to 5V module connected with overvoltage and undervoltage protector, and DC5V to 3.3V module connected with DC12V to 5V module.

[0011] Further, in the utility model, the early warning starting circuit includes the chip U1, chip U2 connected through a plurality of pins, the capacitor C5 that one end is connected with the 15th pin of chip U1 and the other end is connected with the 14th pin of chip U2, the capacitor C6 that one end is connected with the 14th pin of chip U1 and the other end is connected with the 14th pin of chip U2, the single-pole double-throw switch S1 that fixed end is connected with the 14th pin of chip U1, the diode D5 that positive pole is connected with the Q4 pin of chip U1 and negative pole is connected with the 15th pin of chip U1, the resistance R14 that one end is connected with the negative pole of diode D5 and the other end is grounded, the resistance R15 that one end is connected with the 14th pin of chip U1 and the other end is grounded, the capacitor C7 that one end is connected with the 3rd pin of chip U1 and the 13th pin of chip U2, the capacitor C8 that one end is connected with the 2nd pin of chip U1 and the 5th pin of chip U2, the capacitor C9 that one end is connected with the 4th pin of chip U1 and the 6th pin of chip U2, the resistance R7 that one end is connected with the free end of capacitor C7, C8, C9 and the other end is grounded;Wherein, the 1st, 3rd, 8th, 10th pin of chip U2 is connected as input end with single-chip microcomputer control chip, and the movable end of switch S1 is connected with the external alarm circuit.

[0012] Further, in the utility model, the single-chip microcomputer control chip adopts STM32 F1 series.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] The utility model discloses a module converter, pulse signal conditioning circuit, pulse signal detection circuit, single-chip microcomputer control chip and other components, realizes the collection, processing and transmission of meteorological data such as accumulated water.This circuit has the advantages of small size, low energy consumption, compared with the prior art accumulated water alarm device can more effectively meet the low power consumption operation demand, provides a more convenient, reliable solution for the safety monitoring of subway station.Using the circuit can build a station weather monitoring system, realizes the real-time collection and upload of accumulated water data of key low-lying parts, uploads data to the control room monitoring terminal and cloud platform through wireless communication network, and guarantees the safe operation of subway station. BRIEF DESCRIPTION OF DRAWINGS

[0015] Fig. 1 It is the principle diagram of the utility model.

[0016] Fig. 2 It is the principle diagram of the pulse signal conditioning circuit in the utility model.

[0017] Fig. 3 It is the principle diagram of the pulse signal detection circuit in the utility model.

[0018] Fig. 4 It is the principle diagram of the early warning starting circuit in the utility model. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments. The embodiments of the present invention include, but are not limited to, the following embodiments.

[0020] Example

[0021] like Figs. 1-4 As shown, this utility model discloses a meteorological monitoring data acquisition circuit, including an analog-to-digital converter connected to an external sensor, a pulse signal conditioning circuit, a pulse signal detection circuit, and a microcontroller control chip connected sequentially to the analog-to-digital converter, as well as a power supply circuit and an early warning activation circuit connected to the microcontroller control chip; wherein, the power supply circuit is also connected to the early warning activation circuit and the pulse signal detection circuit. In this embodiment, the microcontroller control chip adopts the STM32 F1 series. The STM32 F1 series basic MCU meets the various application needs of the industrial, medical, and consumer markets. This series achieves high performance by utilizing excellent peripherals and low power consumption, low voltage operation, while also achieving high integration at an acceptable price, with a simple architecture and easy-to-use tools. The STM32F103 microcontroller uses a Cortex-M3 core, with a maximum CPU speed of 72MHz. This series of MCUs has 16KB to 1MB Flash, various control peripherals, a USB full-speed interface, and CAN. When no water accumulation occurs, the water accumulation alarm device formed by the acquisition circuit of this utility model operates at ultra-low power consumption, less than 0.1W, and can operate continuously for more than 3 months. When water accumulation occurs, the signal collected by the external sensor is converted into a digital pulse signal by the analog-to-digital converter. After the signal is conditioned and amplified by the pulse signal conditioning circuit, the pulse signal detection circuit immediately wakes up the microcontroller after detecting the relevant pulse signal, and quickly transmits the water accumulation status and water depth data to the monitoring terminal in the vehicle control room. The monitoring terminal displays the water accumulation data in real time and issues a buzzer alarm to alert the staff to immediately carry out on-site inspection and emergency treatment measures, thereby improving the timeliness of emergency response to water accumulation accidents.

[0022] In the embodiment, the pulse signal conditioning circuit comprises a resistor R1 and a capacitor C1 connected in parallel, an operational amplifier A1 connected to the other end of the resistor R1 and the capacitor C1 in parallel, a resistor R2 and a capacitor C2 connected to the positive input end of the operational amplifier A1 and the output end of the operational amplifier A1 respectively, a resistor R3 connected to the negative input end of the operational amplifier A1 and grounded, a potentiometer VR1 connected to the negative input end of the operational amplifier A1, a resistor R4 connected to the sliding end of the potentiometer VR1 and the output end of the operational amplifier A1, and diodes D1 and D2 connected to the sliding end of the potentiometer VR1 and the output end of the operational amplifier A1 respectively. The circuit mainly realizes the conditioning and amplification of digital pulse signals.

[0023] In the embodiment, the pulse signal detection circuit comprises resistors R5, R6 and R7 connected in series, a resistor R8 connected to the two ends of the series connection of the resistors R5, R6 and R7, diodes D3 and D4 connected to the positive end of the resistor R6 and the resistor R5 respectively, a comparator A2 connected to the negative end of the diode D3 and the negative end of the diode D4, a comparator A3 connected to the common end of the resistor R8 and the resistor R7, resistors R9 and R12 and a capacitor C3 connected to the negative input end of the comparator A3, resistors R10 and R11 connected to the other end of the resistor R9, a capacitor C4 connected to the other end of the resistor R12, and a resistor R13 connected to the other end of the capacitor C3, the other end of the capacitor C4 and the output end of the comparator A6; the other end of the resistor R10 and the other end of the resistor R11 are connected to a power supply circuit; the positive input end of the comparator A5 is connected to the output end of the operational amplifier A1, and the positive input end of the comparator A6 is connected to a 3.3V voltage source. The circuit mainly realizes the detection of pulse digital signals and feeds back the detection results to a single-chip microcomputer control chip.

[0024] In the embodiment, the power supply circuit comprises a sampling module connected with the single-chip control chip, a charging module connected with the sampling module, a 12V lithium battery pack and an over-voltage and under-voltage protector, a DC 12V to 5V module connected with the over-voltage and under-voltage protector, and a DC 5V to 3.3V module connected with the DC 12V to 5V module. The sampling module is used to obtain the control signal for starting the single-chip control chip, so that the power supply circuit is switched from the standby power supply state to the full-load power supply state. The over-voltage and under-voltage protector is used to avoid the over-voltage damage of the DC 12V to 5V module. The DC 12V to 5V module is used to convert the 12V lithium battery pack power supply into a 5V chip power supply voltage. The DC 5V to 3.3V module is used to convert the 5V voltage into a 3.3V chip power supply voltage. The above modules are all existing mature modules, and the skilled in the art can directly purchase them on the basis of knowing the functions of the modules.

[0025] In the embodiment, the pre-warning starting circuit comprises a chip U1 and a chip U2 connected through a plurality of pins, a capacitor C5 having one end connected with the 15th pin of the chip U1 and the other end connected with the 14th pin of the chip U2, a capacitor C6 having one end connected with the 14th pin of the chip U1 and the other end connected with the 14th pin of the chip U2, a single-pole double-throw switch S1 having a fixed end connected with the 14th pin of the chip U1, a diode D5 having a positive electrode connected with the Q4 pin of the chip U1 and a negative electrode connected with the 15th pin of the chip U1, a resistor R14 having one end connected with the negative electrode of the diode D5 and the other end grounded, a resistor R15 having one end connected with the 14th pin of the chip U1 and the other end grounded, a capacitor C7 having one end connected with the 3rd pin of the chip U1 and the 13th pin of the chip U2, a capacitor C8 having one end connected with the 2nd pin of the chip U1 and the 5th pin of the chip U2, a capacitor C9 having one end connected with the 4th pin of the chip U1 and the 6th pin of the chip U2, and a resistor R7 having one end connected with the free ends of the capacitors C7, C8 and C9 and the other end grounded. The 1st, 3rd, 8th and 10th pins of the chip U2 are connected with the single-chip control chip as input ends, and the movable end of the switch S1 is connected with an external alarm circuit. When the single-chip control chip receives a water accumulation related pulse signal, the single-chip control chip drives the pre-warning starting circuit, so that the alarm circuit sends an alarm signal.

[0026] Through the above design, the utility model discloses through analog-digital converter, pulse signal conditioning circuit, pulse signal detection circuit, single-chip control chip etc. component, realized the collection, processing and transmission of meteorological data such as water accumulation. This circuit has the advantages such as small size, low energy consumption, compared with the existing water accumulation alarm device can more effectively meet the low-power operation demand, provides a more convenient, reliable solution for the safety monitoring of subway station. Therefore, compared with the prior art, the utility model has substantial characteristics and progress.

[0027] The above embodiment is only one of the preferred embodiments of the present application, and should not be used to limit the protection scope of the present application, but any insignificant modification or polishing made in the main design idea and spirit of the present application, the technical problems solved are still consistent with the present application, and should be included in the protection scope of the present application.

Claims

1. A meteorological monitoring data acquisition circuit, characterized in that, The pulse signal detection circuit comprises resistors R5, R6 and R7 connected in series, a resistor R8 connected in parallel to both ends of the series connection of the resistors R5, R6 and R7, diodes D3 and D4 connected in series with the positive electrode connected to the connection end of the resistors R6 and R7 and the negative electrode connected to the connection end of the resistors R5 and R6, a comparator A2 with the negative input end connected to the negative electrode of the diode D3 and the output end connected to the negative electrode of the diode D4, a comparator A3 with the negative input end connected to the common end of the resistor R8 and the resistor R7, resistors R9 and R12 and a capacitor C3 connected to the negative input end of the comparator A3, resistors R10 and R11 both connected to the other end of the resistor R9, a capacitor C4 connected to the other end of the resistor R12, and a resistor R13 connected to the other ends of the capacitors C3 and C4 and the output end of the comparator A6; wherein the other ends of the resistors R10 and R11 are both connected to the power supply circuit; the positive input end of the comparator A5 is connected to the output end of the operational amplifier A1, and the positive input end of the comparator A6 is connected to a 3.3V voltage source.

2. The meteorological monitoring data acquisition circuit according to claim 1, characterized in that, The pulse signal detection circuit comprises resistors R5, R6 and R7 connected in series, a resistor R8 connected in parallel to both ends of the series connection of the resistors R5, R6 and R7, diodes D3 and D4 connected in series with the positive electrode connected to the connection end of the resistors R6 and R7 and the negative electrode connected to the connection end of the resistors R5 and R6, a comparator A2 with the negative input end connected to the negative electrode of the diode D3 and the output end connected to the negative electrode of the diode D4, a comparator A3 with the negative input end connected to the common end of the resistor R8 and the resistor R7, resistors R9 and R12 and a capacitor C3 connected to the negative input end of the comparator A3, resistors R10 and R11 both connected to the other end of the resistor R9, a capacitor C4 connected to the other end of the resistor R12, and a resistor R13 connected to the other ends of the capacitors C3 and C4 and the output end of the comparator A6; wherein the other ends of the resistors R10 and R11 are both connected to the power supply circuit; the positive input end of the comparator A5 is connected to the output end of the operational amplifier A1, and the positive input end of the comparator A6 is connected to a 3.3V voltage source.

3. The weather monitoring data acquisition circuit of claim 2, wherein, The power supply circuit comprises a sampling module connected to the single-chip microcomputer control chip, a charging module, a 12V lithium battery pack and an over / under voltage protector connected to the sampling module, a DC12V to 5V module connected to the over / under voltage protector, and a DC5V to 3.3V module connected to the DC12V to 5V module.

4. The weather monitoring data acquisition circuit of claim 3, wherein, ​ 5. The weather monitoring data acquisition circuit of claim 4, wherein, The pre-warning starting circuit comprises a chip U1, a chip U2, a capacitor C5 having one end connected with the 15th pin of the chip U1 and the other end connected with the 14th pin of the chip U2, a capacitor C6 having one end connected with the 14th pin of the chip U1 and the other end connected with the 14th pin of the chip U2, a single-pole double-throw switch S1 having a fixed end connected with the 14th pin of the chip U1, a diode D5 having a positive electrode connected with the Q4 pin of the chip U1 and a negative electrode connected with the 15th pin of the chip U1, a resistor R14 having one end connected with the negative electrode of the diode D5 and the other end grounded, a resistor R15 having one end connected with the 14th pin of the chip U1 and the other end grounded, a capacitor C7 having one end connected with the 3rd pin of the chip U1 and the 13th pin of the chip U2, a capacitor C8 having one end connected with the 2nd pin of the chip U1 and the 5th pin of the chip U2, a capacitor C9 having one end connected with the 4th pin of the chip U1 and the 6th pin of the chip U2, and a resistor R7 having one end connected with the free ends of the capacitors C7, C8 and C9 and the other end grounded; wherein the 1st, 3rd, 8th and 10th pins of the chip U2 are connected with a single-chip microcomputer control chip as input ends, and the movable end of the switch S1 is connected with an external alarm circuit.

6. The weather monitoring data acquisition circuit of claim 5, wherein, The single-chip microcomputer control chip adopts an STM32 F1 series.

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