CN217846928U

CN217846928U - Multi-channel automatic acquisition control terminal based on wireless network

Info

Publication number: CN217846928U
Application number: CN202222305547.5U
Authority: CN
Inventors: 田青; 李奇
Original assignee: Xi'an Mobile Lianxin Intelligent Technology Co ltd
Current assignee: Xi'an Mobile Lianxin Intelligent Technology Co ltd
Priority date: 2022-08-31
Filing date: 2022-08-31
Publication date: 2022-11-18
Anticipated expiration: 2032-08-31

Abstract

The utility model discloses a wireless network-based multi-channel automatic acquisition control terminal, which comprises a power supply unit, an acquisition control unit and a wireless transmission unit; the acquisition control unit comprises an MCU-controller, an analog-to-digital converter, a 485 driver, a DI/DO unit, an analog acquisition interface, a digital 485 interface and a control interface, the power supply unit supplies power to the MCU-controller and the wireless transmission unit, the analog acquisition interface is electrically connected with the analog-to-digital converter, the analog-to-digital converter is electrically connected with the MCU-controller, the digital 485 interface is electrically connected with the 485 driver, the 485 driver is electrically connected with the MCU-controller, the MCU-controller is electrically connected with the DI/DO unit, the DI/DO unit is electrically connected with the control interface, the MCU-controller is electrically connected with the wireless transmission unit, and the analog acquisition interface and the digital 485 interface are externally connected with various sensors.

Description

Multi-channel automatic acquisition control terminal based on wireless network

Technical Field

The utility model belongs to the technical field of gather or control terminal, concretely relates to multichannel automatic acquisition control terminal based on wireless network.

Background

With the development of big data and artificial intelligence technology, the automatic control technology is introduced into the intelligent water service field to realize the automatic control of equipment such as water pumps, valves and rolling shutters, thereby realizing unattended operation of a factory, reducing the threshold of operation technology and liberating labor force.

The existing control scheme mostly adopts PLC control, and has the defects of troublesome wiring, high cost, more fault points and inconvenient maintenance.

The existing terminal can only carry out data acquisition and transmission and cannot carry out automatic control, so that the control efficiency is reduced.

Some existing terminals are powered by mains supply 220V or batteries, when the mains supply 220V is powered off, software control is needed for switching, and the fault rate of switching the mains supply 220V into the batteries is high, and the stability is poor.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome above-mentioned prior art not enough, provide a multichannel automatic acquisition control terminal based on wireless network.

In order to solve the technical problem, the technical scheme of the utility model is that: a multi-channel automatic acquisition control terminal based on a wireless network comprises a power supply unit, an acquisition control unit and a wireless transmission unit;

the acquisition control unit comprises an MCU-controller, an analog-to-digital converter, a 485 driver, a DI/DO unit, an analog acquisition interface, a digital 485 interface and a control interface, the power supply unit is powered on the MCU-controller and the wireless transmission unit, the analog acquisition interface is electrically connected with the analog-to-digital converter, the analog-to-digital converter is electrically connected with the MCU-controller, the digital 485 interface is electrically connected with the 485 driver, the 485 driver is electrically connected with the MCU-controller, the MCU-controller is electrically connected with the DI/DO unit, the DI/DO unit is electrically connected with the control interface, the MCU-controller is electrically connected with the wireless transmission unit, the analog acquisition interface and the digital 485 interface are externally connected with various sensors, the control interface is externally connected with a water pump/valve of a controlled device, and the wireless transmission unit is wirelessly connected with a computer end/mobile end of a background server.

Preferably, the power supply unit comprises a 5V conversion unit, a first power conversion IC, a switching circuit IC, a second power conversion IC, a charging management IC and a rechargeable lithium battery, the 5V conversion unit is externally connected with a mains supply 220v, and a 5V conversion unit is respectively and electrically connected with the first power conversion IC and the charging management IC, the first power conversion IC is electrically connected with the switching circuit IC, the switching circuit IC is electrically connected with the second power conversion IC, the second power conversion IC supplies power to the MCU-controller, the switching circuit IC supplies power to the wireless transmission unit, and the charging management IC is electrically connected with the rechargeable lithium battery.

Preferably, the switching circuit IC comprises a MOS transistor Q6, a resistor R27, a resistor R75 and a resistor R76, wherein pin 1 of the MOS transistor Q6 is electrically connected with the resistor R27, the resistor R75 and the resistor R76 respectively, the other end of the resistor R75 is grounded, the other end of the resistor R76 is electrically connected with the rechargeable lithium battery, the other end of the resistor R27 is electrically connected with the first power switching IC, pin 2 of the MOS transistor Q6 is connected with the second power switching IC and outputs VBAT _3v8, and pin 3 of the MOS transistor Q6 is connected with the rechargeable lithium battery.

Preferably, the wireless transmission unit comprises a 4G module, an NB module and an LoRa module, and the 4G module, the NB module and the LoRa module are respectively electrically connected to the MCU-controller.

Preferably, the MCU-controller comprises a single chip microcomputer U15, a magnetic bead L5, an inductor L13, a crystal oscillator X4, a load capacitor C83, a load capacitor C84, a filter capacitor C17, a filter capacitor C23, a filter capacitor C42, a capacitor C88, an inductor L12, a bluetooth antenna J10, a capacitor C87, a connector J4, an inductor L1, an inductor L4 and a crystal oscillator X1;

an AB 2pin of the single chip microcomputer U15 is connected with an inductor L13, the other end of the inductor L13 is connected with a W1 pin of the single chip microcomputer U15, a capacitor C73 and a magnetic bead L5 respectively, the other end of the capacitor C73 is grounded, the other end of the magnetic bead L5 is connected with a filter capacitor C17, a filter capacitor C23 and a filter capacitor C42 respectively, and the other ends of the filter capacitor C17, the filter capacitor C23 and the filter capacitor C42 are grounded respectively;

the A23 pin of the single chip microcomputer U15 is respectively connected with the 1 pin of the crystal oscillator X4 and the load capacitor C83, the B24 pin of the single chip microcomputer U15 is respectively connected with the 3 pin of the crystal oscillator X4 and the load capacitor C84, the other ends of the load capacitor C83 and the load capacitor C84 are grounded, and the 2pin and the 4pin of the crystal oscillator X4 are grounded;

the H23 pin of the single chip microcomputer U15 is connected with a capacitor C88 and an inductor L12 respectively, the other end of the inductor L12 is connected with a Bluetooth antenna J10 and a capacitor C87 respectively, the other ends of the capacitor C88 and the capacitor C87 are connected with the F23 pin of the single chip microcomputer U15 respectively, and the other ends of the capacitor C88 and the capacitor C87 are grounded;

the AC24 pin of the single chip microcomputer U15 is connected with the 4 pins of the connector J4, the AA24 pin of the single chip microcomputer U15 is connected with the 3 pins of the connector J4, 1 pin of the connector J4 is respectively connected with the resistor R106, the filter capacitor C17, the filter capacitor C23 and the filter capacitor C42, the other end of the resistor R106 is connected with the 4 pins of the connector J4, and the 2 pins of the connector J4 are grounded;

a pin C1 of the single chip microcomputer U15 is connected with a capacitor C17, the other end of the capacitor C17 is respectively connected with a capacitor C71 and a capacitor C72, the other end of the capacitor C71 is respectively connected with a pin D2 of the crystal oscillator X1 and the single chip microcomputer U15, and the other end of the capacitor C72 is respectively connected with the other end of the crystal oscillator X1 and a pin F2 of the single chip microcomputer U15;

a pin B3 of the single chip microcomputer U15 is connected with an inductor L1, the other end of the inductor L1 is connected with an inductor L4, the other end of the inductor L4 is respectively connected with a capacitor C79, a capacitor C80 and a pin E24 of the single chip microcomputer U15, and the other ends of the capacitor C79 and the capacitor C80 are grounded;

the single chip microcomputer U15 is further connected with the 4G module, the NB module and the LoRa module respectively.

Preferably, the analog-to-digital converter comprises an analog-to-digital conversion U3 and a resistor RP1, wherein a PIN 2 of the analog-to-digital conversion U3 is connected with a PIN 1 of the resistor RP1, a PIN 1 of the analog-to-digital conversion U3 is connected with a PIN 3 of the resistor RP1, a PIN 16 of the analog-to-digital conversion U3 is connected with a PIN 5 of the resistor RP1, a PIN 15 of the analog-to-digital conversion U3 is connected with a PIN 7 of the resistor RP1,

PINs

2, 4, 6 and 8 of the resistor RP1 are respectively connected with the MCU-controller,

PINs

6, 7, 10 and 11 of the analog-to-digital conversion U3 are respectively connected with 4 low-pass filters, 4 low-pass filters are respectively connected with a 4PIN joint J7 and a 4PIN joint J14, and the 4PIN joint J7 and the 4PIN joint J14 are connected with an analog quantity acquisition interface.

Preferably, the 485 driver includes a 485 driver chip U7, a common-mode inductor U10 and an ESD protection device D5,

pins

15 and 17 of the 485 driver chip U7 are respectively connected to pins 1 of the common-mode inductor U10,

pins

13 and 18 of the 485 driver chip U7 are respectively connected to pins 2 of the common-mode inductor U10, a resistor R15 is connected between pin 1 and pin 2 of the common-mode inductor U10, pin 3 of the common-mode inductor U10 is connected to pin 2 of the ESD protection device D5, pin 4 of the common-mode inductor U10 is connected to pin 1 of the ESD protection device D5, pin 3 of the common-mode inductor U10 is grounded,

pins

4, 5, 6 and 7 of the 485 driver chip U7 are connected to an MCU-controller, and the 485 driver chip U7 is connected to a digital 485 interface.

Preferably, the DI/DO unit comprises a DO control circuit and a DI control circuit, the DO control circuit comprises a relay U2, a triode Q1, a resistor R4 and a fuse F1, a PIN 1 of the relay U2 is connected with a PIN 3 of the triode Q1 through the resistor R1 and provides VCC-5V-IN, a PIN 2 of the relay U2 provides VCC-5V-IN, a PIN 6 of the relay U2 is connected with a PIN 1 of the fuse F1, a PIN 2 of the fuse F1 is connected with a PIN 2 of a PIN 2 joint J3, a PIN 8 of the relay U2 is connected with a PIN 1 of the PIN 2 joint J3, a PIN 1 of the triode Q1 is connected with the DIO-DO1 through the resistor R2, a PIN 1 of the triode Q1 is grounded through the resistor R4, and a PIN 1 of the triode Q1 is grounded;

the DI control circuit comprises a rectifier bridge U31, a voltage stabilizing diode D29, a filter capacitor C6, a light emitting diode D1, an optocoupler U5, a resistor R166 and a resistor R167, wherein a PIN 1 of the rectifier bridge U31 is connected with a PIN 1 of a PIN 2 connector J1 through a resistor R11, a PIN 2 of the rectifier bridge U31 is connected with a PIN 2 of the PIN 2 connector J1, a PIN 3 of the rectifier bridge U31 is respectively connected with the voltage stabilizing diode D29, the filter capacitor C6 and the light emitting diode D1, a PIN 4 of the rectifier bridge U31 is respectively connected with the other end of the voltage stabilizing diode D29, the other end of the filter capacitor C6 and a PIN 2 of the optocoupler U5, the other end of the light emitting diode D1 is connected with the PIN 1 of the optocoupler U5, a PIN 3 of the optocoupler U5 is connected with the resistor R166, a PIN 3 of the optocoupler U5 is also connected with the resistor R167 and is connected with a DIO-DI1, and a PIN 4 of the optocoupler U5 is grounded;

the 2PIN joint J1 and the 2PIN joint J3 are connected with a control interface, and the control interface is externally connected with a water pump/valve of controlled equipment;

the DIO-DO1 and the DIO-DI1 are respectively connected with the MCU-controller.

Preferably, the multiple sensors comprise a liquid level sensor, a pressure sensor and a temperature and humidity sensor, and the multi-channel automatic acquisition control terminal based on the wireless network is further in wireless connection with other acquisition terminals.

Compared with the prior art, the utility model has the advantages of:

(1) The utility model discloses a multichannel automatic acquisition control terminal based on wireless network, the acquisition control unit will control and gather the integration, the acquisition control unit is used for data acquisition through analog quantity acquisition interface and digital 485 interface connection multiple sensor, data are handled through MCU-controller, then transform into control data through DI/DO unit, water pump/valve through the control interface connection controled equipment for the opening and closing of control water pump/valve, realize gathering, control integration, reduce cost; the utility model does not use PLC control, does not need troublesome wiring, has low cost, few fault points, convenient installation and convenient maintenance;

(2) The utility model discloses other sensor equipment can be directly gathered through analog quantity collection interface and digit 485 interface to the collection control unit, produces the linkage with a plurality of sensor equipment, also can be used for gathering data through other collection terminals of wireless network connection to participate in the control, reduce collection module quantity, reduce cost realizes multichannel control, need not increase collection terminal, reduce cost;

(3) The utility model discloses wireless transmission unit utilizes multiple thing networking transmission mode to be compatible, has adopted multiple ripe thing networking wireless transmission mode loRa, 4G, NB, and the user can customize one or more wireless transmission mode according to self scene needs, guarantees the stable transmission of data, reaches high-efficient automatic control's purpose, does not rely on single wireless transmission mode, does not have the limitation to equipment application scene, and the control success rate is high; the utility model discloses a wireless transmission unit and backstage server's computer end/mobile terminal wireless connection, computer end, cell-phone end all can look over and revise backstage information, and it is more convenient to operate;

(4) The utility model discloses the power supply unit is used for supplying power for acquisition control unit and wireless transmission unit, can carry out commercial power 220V power failure monitoring simultaneously, because the switching circuit IC switching circuit process of power supply unit is accomplished by hardware circuit completely, does not have software control to intervene, can improve switching efficiency by a wide margin, improves system stability, and switching circuit does not need other singlechip software to support, reduces cost by a wide margin; when the commercial power is supplied by 220V, the rechargeable lithium battery does not participate in power supply, so that the charging and using times of the rechargeable lithium battery are reduced, and the service life of the rechargeable lithium battery is prolonged;

(5) The utility model is mainly applied to the field of intelligent water affairs at present, and automatically controls the starting and stopping of equipment such as water pumps, valves, curtain rolling machines and the like in unattended places; the terminal can receive data of other acquisition terminals in a wireless transmission mode to generate linkage, and has an acquisition function to realize integration of acquisition and control.

Drawings

Fig. 1 is a block diagram of a multi-channel automatic acquisition control terminal based on a wireless network according to the present invention;

fig. 2 is a schematic view of the utility model of a multi-channel automatic acquisition control terminal based on wireless network;

FIG. 3 is a circuit diagram of the 5V conversion unit of the present invention;

fig. 4 is a circuit diagram of a first power conversion IC of the present invention;

fig. 5 is a circuit diagram of a second power conversion IC of the present invention;

fig. 6 is a circuit diagram of the charging management IC of the present invention;

FIG. 7 is a circuit diagram of a switching circuit IC of the present invention;

FIG. 8 is a circuit diagram of the MCU-controller of the present invention;

fig. 9 is a circuit diagram of the analog-to-digital converter of the present invention;

fig. 10 is a circuit diagram of the 485 driver of the present invention;

fig. 11 is a circuit diagram of the DO control circuit of the present invention;

fig. 12 is a circuit diagram of the DI control circuit of the present invention.

Detailed Description

The following description of the embodiments of the present invention is provided in connection with the following embodiments:

it should be noted that the structures, ratios, sizes, etc. illustrated in the present specification are only used to cooperate with the contents disclosed in the specification for the understanding and reading of the people skilled in the art, and are not used to limit the limit conditions that the present invention can be implemented, and any modifications of the structures, changes of the ratio relationships or adjustments of the sizes should still fall within the scope that the technical contents disclosed in the present invention can cover without affecting the functions and the achievable purposes of the present invention.

Example 1

As shown in fig. 1, the utility model discloses a multi-channel automatic acquisition control terminal based on wireless network, which comprises a power supply unit, an acquisition control unit and a wireless transmission unit;

Example 2

As shown in fig. 1, the power supply unit includes a 5V conversion unit, a first power conversion IC, a switching circuit IC, a second power conversion IC, a charging management IC and a rechargeable lithium battery, the 5V conversion unit is externally connected to a mains supply 220v, a 5V conversion unit which is electrically connected to the first power conversion IC and the charging management IC respectively, the first power conversion IC is electrically connected to the switching circuit IC, the switching circuit IC is electrically connected to the second power conversion IC, the second power conversion IC supplies power to the MCU-controller, the switching circuit IC supplies power to the wireless transmission unit, and the charging management IC is electrically connected to the rechargeable lithium battery.

As shown in fig. 7, the switching circuit IC includes a MOS transistor Q6, a resistor R27, a resistor R75, and a resistor R76, where pin 1 of the MOS transistor Q6 is electrically connected to the resistor R27, the resistor R75, and the resistor R76, respectively, the other end of the resistor R75 is connected to ground, the other end of the resistor R76 is electrically connected to the rechargeable lithium battery, the other end of the resistor R27 is electrically connected to the first power switching IC, pin 2 of the MOS transistor Q6 is connected to the second power switching IC, and outputs VBAT _3v8, and pin 3 of the MOS transistor Q6 is connected to the rechargeable lithium battery.

The switching circuit IC is mainly realized by utilizing the cut-off and the conduction of the MOS tube FDN 340;

when the mains power is supplied by 220V, the 4G V/u VBAT/u DET has a pull-up 10K resistor in a schematic diagram of converting 5V to 3.8V, so that the signal of the 4G V/u VBAT/u DET is at a high level at the moment, the 1 pin of the FDN340 is also at a high level, the MOS transistor FDN340 is at a cut-off state at the moment, and VBAT _3V8 is provided by a power converter converting 5V to 3.8V;

when the mains supply 220V is powered off, the 4g _vbat _detsignal is at a low level, and at this time, the MOS transistor FDN340 is IN a conducting state, and due to the power failure of the mains supply 220V, the voltage VBAT _3V8 obtained by the power converter also disappears, and due to the conduction of the MOS transistor FDN340, the VBAT _ IN provided by the rechargeable lithium battery flows to VBAT _3V8, and continues to supply power to subsequent components.

When the commercial power is supplied by 220V, the rechargeable lithium battery does not participate in the work, the charging and using times of the rechargeable lithium battery are reduced, and the service life of the rechargeable lithium battery is prolonged.

Because the switching circuit is completely completed by a hardware circuit without software control intervention, the switching efficiency can be greatly improved, and the system stability is improved.

The switching circuit does not need the support of other single-chip microcomputer software, thereby greatly reducing the cost.

As shown in fig. 3, it is a circuit diagram of a 5V conversion unit, which converts a commercial ac 220V into a dc 5V;

in the figure, J23 is a 220V commercial power input connecting piece, F2 is a fuse, R104 is a piezoresistor, U13 is an ACDC conversion module, the fuse and the piezoresistor are selected as household protection devices at the front end of the circuit, and the rear devices are prevented from being burnt when the current and the voltage are large; when 5V voltage is output, a plurality of filter capacitors are selected to provide clean power input for subsequent circuits.

As shown in fig. 4, a circuit diagram of the first power conversion IC converts dc 5V into 3.8V;

there is diode D21 before the 5V power gets into DCDC, diode D21 mainly prevents that lithium cell electric current from flowing backward, the DCDC model adopts SY8113BADC, this is the efficient synchronous voltage drop DC-DC converter, what this chip adopted is PWM technique, main switch and synchronous switch have been integrateed simultaneously in order to reduce the energy consumption, its input voltage can select in 4.5V to 18V scope, R132 and R131 adopt high accuracy resistance, the purpose is in order to provide accurate 3.8V voltage source, 3.8V is the voltage source that provides for wireless transmission module.

As shown in fig. 5, a circuit diagram of a second power conversion IC converts 3.8V dc to 3.3V dc;

3.8V changes the DCDC model SY8089AAAC that 3.3V chooseed for use, SY8089AAAC is a synchronous step-down DC-DC regulator, and IC can provide the output current as high as 2A, has very low output voltage ripple and little external inductor and condenser, has short circuit and overvoltage protection latch closing function. The terminal can be provided with a stable and reliable 3.3V voltage with low ripple.

As shown in fig. 6, is a circuit diagram of the charge management IC;

the J12 connector is connected with a rechargeable lithium battery, the TP4056 is a lithium battery power supply management chip and mainly used for controlling the charging current and voltage of the lithium battery, and the R39 connector can adjust the charging current.

Example 3

As shown in fig. 1, the wireless transmission unit includes a 4G module, an NB module, and an LoRa module, and the 4G module, the NB module, and the LoRa module are electrically connected to the MCU-controller, respectively.

The 4G module selects converged AIR724UG which is a mainstream 4G CAT 1 module at present, the AIR724UG is internally provided with rich network protocols, integrates a plurality of industrial standard interfaces, supports a plurality of driving and software functions, and communicates with the MCU-controller through UART.

The NB module is an NB module NB81 developed by Lierda, the NB81 is an NB-IoT module, the NB module is communicated with the infrastructure of a mobile network operator through a 3GPP Rel-14 radio protocol, the NB module has the characteristics of radio frequency baseband integrated design, high integration level and low cost, and the NB module is communicated with the MCU-controller through a UART.

The LoRa module mainly adopts a mature and stable radio frequency module and ASR6500S, and communicates with the MCU-controller through an SPI interface.

Example 4

As shown in fig. 8, the MCU-controller includes a single chip microcomputer U15, a magnetic bead L5, an inductor L13, a crystal oscillator X4, a load capacitor C83, a load capacitor C84, a filter capacitor C17, a filter capacitor C23, a filter capacitor C42, a capacitor C88, an inductor L12, a bluetooth antenna J10, a capacitor C87, a connector J4, an inductor L1, an inductor L4, and a crystal oscillator X1;

an AB 2pin of the single chip microcomputer U15 is connected with an inductor L13, the other end of the inductor L13 is respectively connected with a W1 pin of the single chip microcomputer U15, a capacitor C73 and a magnetic bead L5, the other end of the capacitor C73 is grounded, the other end of the magnetic bead L5 is respectively connected with a filter capacitor C17, a filter capacitor C23 and a filter capacitor C42, and the other ends of the filter capacitor C17, the filter capacitor C23 and the filter capacitor C42 are respectively grounded;

an AC24 pin of the single chip microcomputer U15 is connected with a 4pin of the connector J4, an AA24 pin of the single chip microcomputer U15 is connected with a 3 pin of the connector J4, a 1 pin of the connector J4 is respectively connected with a resistor R106, a filter capacitor C17, a filter capacitor C23 and a filter capacitor C42, the other end of the resistor R106 is connected with the 4pin of the connector J4, and a 2pin of the connector J4 is grounded;

the C1 pin of the single chip microcomputer U15 is connected with a capacitor C17, the other end of the capacitor C17 is respectively connected with a capacitor C71 and a capacitor C72, the other end of the capacitor C71 is respectively connected with the crystal oscillator X1 and the D2 pin of the single chip microcomputer U15, and the other end of the capacitor C72 is respectively connected with the other end of the crystal oscillator X1 and the F2 pin of the single chip microcomputer U15;

The MCU-controller is an MCU with a Bluetooth function, the model number nRF52840 is a singlechip designed by NORDIC company based on an ARM Cortex-M4 CPU and a floating point computing unit (FPU), the MCU-controller is provided with a 1MB flash memory and a 256kB RAM, and the main frequency rate can reach 64MHz.

Due to the use of the magnetic beads L5, the interference of high-frequency signals is reduced, and the stability of the system is improved.

The crystal oscillator X4 is provided with the load capacitors C83 and C84, so that a more accurate 32MHz clock is provided, and the connection stability of Bluetooth is improved.

The use of the filter capacitors C17, C23 and C42 reduces the ripple of the system 3.3V, so that the MCU-controller works more stably.

The design of the blue tooth antenna pi-shaped circuits C88, L12 and C87 improves the emission gain of the blue tooth, and the transmission distance of the blue tooth is stronger.

Connector J4, for use with a debug interface.

The inductors L1, L4 and L13 are matched with the power supply conversion inside the MCU-controller, so that the power consumption of the MCU-controller during working is reduced.

Example 5

As shown in fig. 9, the analog-to-digital converter includes an analog-to-digital converter U3 and a resistor RP1, a PIN 2 of the analog-to-digital converter U3 is connected to a PIN 1 of the resistor RP1, a PIN 1 of the analog-to-digital converter U3 is connected to a PIN 3 of the resistor RP1, a PIN 16 of the analog-to-digital converter U3 is connected to a PIN 5 of the resistor RP1, a PIN 15 of the analog-to-digital converter U3 is connected to a PIN 7 of the resistor RP1, PINs 2, 4, 6, and 8 of the resistor RP1 are respectively connected to the MCU-controller, PINs 6, 7, 10, and 11 of the analog-to-digital converter U3 are respectively connected to 4 low-pass filters, 4 low-pass filters are respectively connected to 4PIN connectors J7 and 4PIN connectors J14, and the 4PIN connectors J7 and 4PIN connectors J14 are connected to the analog quantity acquisition interface.

The analog-digital conversion U3 selects an analog-digital converter model ADS1120 of TI company, the ADS1120 is an analog-digital converter of a low-power consumption, low-noise, 16-bit and small-signal sensor, the analog-digital converter is communicated with the MCU-controller through an SPI interface, and the terminal supports 4-path 4-20mA analog quantity input.

And the exclusion resistor RP1 is connected between the MCU-controller and the ADS1120 signal in series, so that signal reflection is reduced, and the signal communication quality is improved.

The resistor R28 isolates the analog ground from the digital ground, reduces the influence of a ground loop on an analog signal and improves the acquisition precision.

And 4 paths of R and C low-pass filtering, namely R23, C21, R25, C25, R148, C121, R149 and C122, filtering each path of low-frequency signal, and ensuring the integrity of the signal.

4 groups of D13, D14, D8, D9, D15, D16, D11 and D12 are used, and the 8KV static electricity can be resisted, so that the circuit is protected from being damaged.

R114, R115, R55 and R113 are resistors with the precision of 0.1 per mill of low temperature drift, and the signal conversion precision is improved.

Example 6

As shown in fig. 10, the 485 driver includes a 485 driver chip U7, a common mode inductor U10, and an ESD protection device D5, pins 15 and 17 of the 485 driver chip U7 are respectively connected to pin 1 of the common mode inductor U10, pins 13 and 18 of the 485 driver chip U7 are respectively connected to pin 2 of the common mode inductor U10, a resistor R15 is connected between pin 1 and pin 2 of the common mode inductor U10, pin 3 of the common mode inductor U10 is connected to pin 2 of the ESD protection device D5, pin 4 of the common mode inductor U10 is connected to pin 1 of the ESD protection device D5, pin 3 of the common mode inductor U10 is grounded, pins 4, 5, 6, and 7 of the 485 driver chip U7 are connected to an MCU-controller, and the 485 driver chip U7 is connected to a digital 485 interface.

A485 driving chip selected by the 485 driving chip U7 is ADM2582EBRWZ, the chip is an isolated RS-485 driver, an external power supply and an internal power supply can be isolated, input and output pins can provide +/-15 KV electrostatic protection, and the device has open-circuit and short-circuit fault protection functions.

The common-mode inductor U10 can improve the common-mode signal resistance and improve the communication quality.

The ESD protection device D5 can play a role in protecting the 485 driver, and the signal anti-interference capacity is improved.

Example 7

The DI/DO unit includes a DO control circuit and a DI control circuit;

as shown IN fig. 11, the DO control circuit includes a relay U2, a transistor Q1, a resistor R4, and a fuse F1, wherein PIN 1 of the relay U2 is connected to PIN 3 of the transistor Q1 through the resistor R1 and provides VCC-5V-IN, PIN 2 of the relay U2 provides VCC-5V-IN, PIN 6 of the relay U2 is connected to PIN 1 of the fuse F1, PIN 2 of the fuse F1 is connected to PIN 2 of the PIN connector J3, PIN 8 of the relay U2 is connected to PIN 1 of the PIN connector J3, PIN 1 of the transistor Q1 is connected to DIO-DO1 through the resistor R2, PIN 1 of the transistor Q1 is grounded through the resistor R4, and PIN 1 of the transistor Q1 is grounded.

The DO control circuit selects a Fuji-Tong relay, the type is F3AA005E, when DIO _ DO1 is at a low level, the triode S8050 works in a cut-off state, so that

pins

1 and 2 of the F3AA005E are both high, the relay is in an on state, when the DIO _ DO1 is at a high level, the triode S8050 is conducted, pin 1 of the F3AA005E is low, pin 2 is high, the relay is attracted, and the relay is in an off state at the moment.

The terminal supports 8-path DO control.

R4 is 47K resistance pull-down ground connection, is the low level during default state, prevents that the software from not controlling the time, and the high-low level is indefinite, switches the relay round trip, leads to damaging the device.

The triode Q1 can increase the capacity of a driving relay of the IO port of the MCU-controller.

Relay U2 may provide a 5A current capability.

The fuse F1 prevents the relay from being opened instantly, the current is too large, the control equipment is damaged, and the protective effect is achieved.

As shown in fig. 12, the DI control circuit includes a rectifier bridge U31, a zener diode D29, a filter capacitor C6, a light emitting diode D1, an optocoupler U5, a resistor R166, and a resistor R167, wherein a PIN 1 of the rectifier bridge U31 is connected to a PIN 1 of a PIN 2 junction J1 through a resistor R11, a PIN 2 of the rectifier bridge U31 is connected to a PIN 2 of the PIN 2 junction J1, a PIN 3 of the rectifier bridge U31 is connected to the zener diode D29, the filter capacitor C6, and the light emitting diode D1, a PIN 4 of the rectifier bridge U31 is connected to the other end of the zener diode D29, the other end of the filter capacitor C6, and the PIN 2 of the optocoupler U5, the other end of the light emitting diode D1 is connected to a PIN 1 of the optocoupler U5, a PIN 3 of the optocoupler U5 is connected to the resistor R166, a PIN 3 of the optocoupler U5 is further connected to the resistor R167 and connected to the DIO-DI1, and a PIN 4 of the optocoupler U5 is grounded;

the DIO-DO1 and the DIO-DI1 are respectively connected with the MCU-controller.

The DI control circuit can realize the monitoring of the on and off states of 220V alternating current, and the terminal supports 10 DI monitoring.

The rectifier bridge U31 may convert the ac signal to a dc signal.

The zener diode D29 can stabilize the dc voltage at 5.1V.

C6 is a filter capacitor which can filter noise waves.

The light emitting diode D1 is on when the power is on and off when the power is off, and plays a role in indicating.

The optocoupler U5 plays an isolation role, ensures that the MCU-controller circuit is isolated from the controlled equipment, and prevents the circuit fault of the controlled equipment from damaging the control circuit of the terminal.

The pull-up resistor R166 keeps the terminal in a stable high state when not powered on, and prevents signal suspension and misoperation.

Resistor R167 may serve as a current limiting function.

As shown in fig. 2, the various sensors include a liquid level sensor, a pressure sensor and a temperature and humidity sensor, and the multi-channel automatic acquisition control terminal based on the wireless network can also be in wireless connection communication with other acquisition terminals.

The working principle of the utility model is as follows:

as shown in fig. 1 and 2, the utility model discloses a multichannel automatic acquisition control terminal based on wireless network, including electrical unit, acquisition control unit and wireless transmission unit, the leading principle is based on thing networking wireless network transmission data, realize automatic acquisition control function, wherein wireless transmission unit mode supports 4G, NB, loRa, the user can select one or more wireless transmission mode, the acquisition interface includes analog quantity acquisition interface and digit 485 interface, support analog quantity 4-20mA input and 485 input interface, these two kinds of interfaces have covered most sensor interface on the market, what the control interface adopted is DI/DO control, digital switching value, the utility model discloses acquisition control terminal is through the acquisition interface of self, gathers various sensor data, contains but not limited to pressure, sensors such as liquid level, DO, then handles sensor data through MCU-controller again, converts control data through DI/DO unit, realizes the automatic control to controlled equipment, realizes gathering, control integration.

The utility model discloses what the power supply unit mainly realized is power conversion, change into direct current 5V by alternating current 220V earlier, realize ACDC conversion, there is one kind of 5V to convert into 3.8V through DCDC and give the wireless transmission unit power supply, simultaneously 5V also carries out charge management to chargeable lithium cell through charging management IC, still one kind of 5V converts into 3.8V through first power conversion IC, simultaneously and lithium cell input enter switching circuit IC, when realizing that the commercial power is normal through switching circuit IC, the lithium cell is out of work, when having a power failure, start the lithium cell power supply; the acquisition control unit mainly realizes the design of 3 interfaces, an analog acquisition interface of 4-20mA, a digital 485 interface and a control interface; the wireless transmission part has the function of transmitting the acquired data to the background server in a 4G, NB and LoRa wireless transmission mode.

As shown in fig. 2, the collection terminal is an alternative device in the implementation of the collection control terminal of the present invention, that is, when the collection point is far away from the controlled device or the collection of data must be implemented in a wireless transmission manner. Multiple sensor is connected to collection terminal self to the data of gathering through certain sending frequency, sends for wireless transmission mode the utility model discloses collection control terminal can realize like this collection terminal with the utility model discloses collection control terminal's linkage, the utility model discloses collection control terminal handles received data analysis, then makes corresponding execution action to controlled equipment to reach automatic control's purpose.

As shown in fig. 2, the background server is a display of the data acquisition and controlled device state of the terminal, and may also implement parameter configuration of the terminal, such as configuration of acquisition interval, transmission frequency, high limit, and low limit.

The utility model discloses a multichannel automatic acquisition control terminal based on wireless network, the acquisition control unit will control and gather the integration, the acquisition control unit is used for data acquisition through analog quantity acquisition interface and digital 485 interface connection multiple sensor, data are handled through MCU-controller, then transform into control data through DI/DO unit, water pump/valve through the control interface connection controled equipment for the opening and closing of control water pump/valve, realize gathering, control integration, reduce cost; the utility model discloses do not use PLC control, do not need troublesome wiring, with low costs, the fault point is few, simple to operate, convenient maintenance.

The utility model discloses other sensor equipment are directly gathered to collection control unit accessible analog quantity collection interface and digit 485 interface, produce the linkage with a plurality of sensor equipment, also can be used for data collection through other collection terminals of wireless network connection to participate in control, reduce collection module quantity, reduce cost realizes the multi-path control, need not increase collection terminal, the cost is reduced.

The utility model discloses wireless transmission unit utilizes multiple thing networking transmission mode to be compatible, has adopted multiple ripe thing networking wireless transmission mode loRa, 4G, NB, and the user can customize one or more wireless transmission mode according to self scene needs, guarantees the stable transmission of data, reaches high-efficient automatic control's purpose, does not rely on single wireless transmission mode, does not have the limitation to equipment application scene, and the control success rate is high; the utility model discloses a wireless transmission unit and backend server's computer end/removal end wireless connection, computer end, cell-phone end all can look over and revise backstage information, and it is more convenient to operate.

The utility model discloses the electrical unit is used for supplying power for acquisition control unit and wireless transmission unit, can carry out commercial power 220V power failure monitoring simultaneously, because the switching circuit IC switching circuit process of electrical unit is the hardware circuit completion completely, does not have software control to intervene, can improve switching efficiency by a wide margin, improves system stability, and switching circuit does not need other singlechip software to support, reduces cost by a wide margin; when the commercial power is supplied by 220V, the rechargeable lithium battery does not participate in power supply, so that the charging and using times of the rechargeable lithium battery are reduced, and the service life of the rechargeable lithium battery is prolonged.

The utility model is mainly applied to the field of intelligent water affairs at present, and automatically controls the starting and stopping of equipment such as water pumps, valves, curtain rolling machines and the like in unattended places; the terminal can receive data of other acquisition terminals in a wireless transmission mode to generate linkage, and has an acquisition function to realize acquisition control integration.

Although the preferred embodiments of the present invention have been described in detail, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.

Many other changes and modifications can be made without departing from the spirit and scope of the invention. It is to be understood that the invention is not to be limited to the specific embodiments, and that the scope of the invention is defined by the appended claims.

Claims

1. The utility model provides a multichannel automatic acquisition control terminal based on wireless network which characterized in that: the wireless power supply comprises a power supply unit, an acquisition control unit and a wireless transmission unit;

the acquisition control unit comprises an MCU-controller, an analog-to-digital converter, a 485 driver, a DI/DO unit, an analog acquisition interface, a digital 485 interface and a control interface, wherein the power supply unit supplies power to the MCU-controller and the wireless transmission unit, the analog acquisition interface is electrically connected with the analog-to-digital converter, the analog-to-digital converter is electrically connected with the MCU-controller, the digital 485 interface is electrically connected with the 485 driver, the 485 driver is electrically connected with the MCU-controller, the MCU-controller is electrically connected with the DI/DO unit, the DI/DO unit is electrically connected with the control interface, the MCU-controller is electrically connected with the wireless transmission unit, the analog acquisition interface and the digital 485 interface are externally connected with various sensors, the control interface is externally connected with a water pump/valve of a controlled device, and the wireless transmission unit is wirelessly connected with a computer end/mobile end of the background server.

2. The multi-channel automatic acquisition control terminal based on the wireless network according to claim 1, characterized in that: the power supply unit comprises a 5V conversion unit, a first power supply conversion IC, a switching circuit IC, a second power supply conversion IC, a charging management IC and a rechargeable lithium battery, the 5V conversion unit is externally connected with a mains supply 220V, the 5V conversion unit is respectively and electrically connected with the first power supply conversion IC and the charging management IC, the first power supply conversion IC is electrically connected with the switching circuit IC, the switching circuit IC is electrically connected with the second power supply conversion IC, the second power supply conversion IC supplies power to the MCU-controller, the switching circuit IC supplies power to the wireless transmission unit, and the charging management IC is electrically connected with the rechargeable lithium battery.

3. The wireless network-based multi-channel automatic acquisition control terminal according to claim 2, wherein: the switching circuit IC comprises an MOS tube Q6, a resistor R27, a resistor R75 and a resistor R76, wherein 1 pin of the MOS tube Q6 is respectively and electrically connected with the resistor R27, the resistor R75 and the resistor R76, the other end of the resistor R75 is grounded, the other end of the resistor R76 is electrically connected with a rechargeable lithium battery, the other end of the resistor R27 is electrically connected with a first power supply conversion IC, 2 pins of the MOS tube Q6 are connected with a second power supply conversion IC and output VBAT _3V8, and 3 pins of the MOS tube Q6 are connected with the rechargeable lithium battery.

4. The wireless network-based multi-channel automatic acquisition control terminal according to claim 1, wherein: the wireless transmission unit comprises a 4G module, an NB module and a LoRa module, and the 4G module, the NB module and the LoRa module are electrically connected with the MCU-controller respectively.

5. The multi-channel automatic acquisition control terminal based on the wireless network according to claim 4, characterized in that: the MCU-controller comprises a single chip microcomputer U15, a magnetic bead L5, an inductor L13, a crystal oscillator X4, a load capacitor C83, a load capacitor C84, a filter capacitor C17, a filter capacitor C23, a filter capacitor C42, a capacitor C88, an inductor L12, a Bluetooth antenna J10, a capacitor C87, a connector J4, an inductor L1, an inductor L4 and a crystal oscillator X1;

6. The multi-channel automatic acquisition control terminal based on the wireless network according to claim 1, characterized in that: the analog-to-digital converter comprises an analog-to-digital conversion U3 and a resistor RP1, wherein a PIN 2 of the analog-to-digital conversion U3 is connected with a PIN 1 of the resistor RP1, a PIN 1 of the analog-to-digital conversion U3 is connected with a PIN 3 of the resistor RP1, a PIN 16 of the analog-to-digital conversion U3 is connected with a PIN 5 of the resistor RP1, a PIN 15 of the analog-to-digital conversion U3 is connected with a PIN 7 of the resistor RP1, PINs 2, 4, 6 and 8 of the resistor RP1 are respectively connected with the MCU-controller, PINs 6, 7, 10 and 11 of the analog-to-digital conversion U3 are respectively connected with 4 paths of low-pass filtering, 4 paths of low-pass filtering are respectively connected with a 4PIN joint J7 and a 4PIN joint J14, and the 4PIN joint J7 and the 4PIN joint J14 are connected with an analog quantity acquisition interface.

7. The wireless network-based multi-channel automatic acquisition control terminal according to claim 1, wherein: the 485 driver comprises a 485 driving chip U7, a common-mode inductor U10 and an ESD protection device D5, wherein a pin 15 and a pin 17 of the 485 driving chip U7 are respectively connected with a pin 1 of the common-mode inductor U10, a pin 13 and a pin 18 of the 485 driving chip U7 are respectively connected with a pin 2 of the common-mode inductor U10, a resistor R15 is connected between the pin 1 and the pin 2 of the common-mode inductor U10, a pin 3 of the common-mode inductor U10 is connected with a pin 2 of the ESD protection device D5, a pin 4 of the common-mode inductor U10 is connected with a pin 1 of the ESD protection device D5, a pin 3 of the common-mode inductor U10 is grounded, a pin 4, a pin 5, a pin 6 and a pin 7 of the 485 driving chip U7 are connected with an MCU-controller, and the 485 driving chip U7 is connected with a digital 485 interface.

8. The wireless network-based multi-channel automatic acquisition control terminal according to claim 1, wherein: the DI/DO unit comprises a DO control circuit and a DI control circuit, the DO control circuit comprises a relay U2, a triode Q1, a resistor R4 and a fuse F1, a PIN 1 of the relay U2 is connected with a PIN 3 of the triode Q1 through the resistor R1 and provides VCC-5V-IN, a PIN 2 of the relay U2 provides VCC-5V-IN, a PIN 6 of the relay U2 is connected with a PIN 1 of the fuse F1, a PIN 2 of the fuse F1 is connected with a PIN 2 of a PIN joint J3, a PIN 8 of the relay U2 is connected with a PIN 1 of the PIN joint J3, a PIN 1 of the triode Q1 is connected with the DIO-DO1 through the resistor R2, a PIN 1 of the triode Q1 is grounded through the resistor R4, and a PIN 1 of the triode Q1 is grounded;

the DI control circuit comprises a rectifier bridge U31, a voltage stabilizing diode D29, a filter capacitor C6, a light emitting diode D1, an optocoupler U5, a resistor R166 and a resistor R167, wherein a PIN 1 of the rectifier bridge U31 is connected with a PIN 1 of a 2PIN joint J1 through a resistor R11, a PIN 2 of the rectifier bridge U31 is connected with a PIN 2 of the 2PIN joint J1, a PIN 3 of the rectifier bridge U31 is respectively connected with the voltage stabilizing diode D29, the filter capacitor C6 and the light emitting diode D1, a PIN 4 of the rectifier bridge U31 is respectively connected with the other end of the voltage stabilizing diode D29, the other end of the filter capacitor C6 and the PIN 2 of the optocoupler U5, the other end of the light emitting diode D1 is connected with the PIN 1 of the optocoupler U5, a PIN 3 of the optocoupler U5 is connected with the resistor R166, the PIN 3 of the optocoupler U5 is also connected with the resistor R167 and is connected with a DIO-DI1, and the PIN 4 of the optocoupler U5 is grounded;

the DIO-DO1 and the DIO-DI1 are respectively connected with the MCU-controller.

9. The wireless network-based multi-channel automatic acquisition control terminal according to claim 1, wherein: the multi-sensor system comprises a plurality of sensors, a wireless network, a multi-channel automatic acquisition control terminal and a plurality of wireless network terminals, wherein the plurality of sensors comprise a liquid level sensor, a pressure sensor and a temperature and humidity sensor, and the multi-channel automatic acquisition control terminal based on the wireless network is also in wireless connection with other acquisition terminals.