Remote data acquisition and control equipment

Abstract

The utility model discloses remote data acquisition and control equipment, which comprises a controller and a plurality of meter heads connected with metering equipment, and one end of each meter head is connected with a control unit; the controller comprises a wireless transmission unit, a direct-current power supply input unit, a battery power supply input unit, a processor, a storage unit and an interface unit, the interface unit, the storage unit, the wireless transmission unit and the battery power supply input unit are all connected with the processor, and the direct-current power supply input unit is connected with the battery power supply input unit; according to the utility model, data are collected through the interface unit and uploaded to the cloud service platform through the wireless transmission unit, control instructions or control logics issued by the cloud service platform are received at the same time, the work of the metering equipment is automatically controlled through the cooperation of the controller and the control unit, and a worker does not need to simulate input operation through a keyboard and a mouse. And automatic remote data acquisition and control are facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of energy metering communication, and specifically relates to a remote data acquisition and control device. Background Art

[0002] Energy is the basis of social activities, usually referring to coal, petroleum, natural gas, biomass energy, electricity, heat, and other various resources that can obtain useful energy directly or through processing and conversion. In all links from energy production to consumption, only by reducing consumption, minimizing losses and pollutant emissions, and stopping waste can energy be utilized effectively and rationally. In energy production, storage, conversion, utilization, management, and research, activities to achieve unified units, accurate and reliable measurement, and energy metering are important means for energy conservation and emission reduction.

[0003] After retrieval, the Chinese patent document with the application number 202110363248.4 discloses a device for realizing remote data acquisition and control of equipment, including a control BOX. The input end of the control BOX is connected to the output end of a non-standard device to obtain the output signal of the output end of the non-standard device. The control BOX includes a video data conversion layer, an image information transmission layer, an image analysis layer, and an instruction layer. In this invention, the control BOX receives the video output VGA, DVI, and HDMI signals of the non-standard device, converts the video output VGA, DVI, and HDMI signals into video digital signals through the video data conversion layer, intercepts the video digital signals through the image information transmission layer to generate picture information and transmits it to the image analysis layer through the vnc protocol, analyzes the numbers and characters in the pictures in real time through the image analysis layer, and realizes remote information input and control at the non-standard device end through keyboard and mouse simulation input, and the acquisition and remote control are instruction-based, and data acquisition and remote control are achieved through an instruction-based method.

[0004] However, when the above device for realizing remote data acquisition and control analyzes the numbers and characters in the pictures in real time, it requires personnel to perform simulation input operations through the keyboard and mouse, which is not convenient for automatically controlling metering equipment. Therefore, we need to propose a remote data acquisition and control device to solve the above problems. Summary of the Invention

[0005] The purpose of the utility model is to provide a remote data acquisition and control device, which collects data through an interface unit and uploads it to a cloud service platform through a wireless transmission unit. At the same time, it receives control instructions or control logics issued by the cloud service platform, and realizes the automatic control of the metering equipment through the cooperation of a controller and a control unit, so as to solve the problems raised in the background art.

[0006] To achieve the above object, the utility model provides the following technical solution: A remote data acquisition and control device, including a controller and multiple meter heads connected to metering devices, and a control unit is connected to one end of each of the meter heads;

[0007] The controller includes a wireless transmission unit, a DC power input unit, a battery power input unit, a processor, a storage unit, and an interface unit. The interface unit, the storage unit, the wireless transmission unit, and the battery power input unit are all connected to the processor, and the DC power input unit is connected to the battery power input unit;

[0008] The interface unit includes an MBUS interface, a MODBUS interface, and a DO interface. The MBUS interface and the MODBUS interface are bidirectionally connected to the processor, the DO interface is unidirectionally connected to the processor, the control unit is connected to the MBUS interface and the DO interface respectively through a communication line, and the meter head is connected to the MODBUS interface through a communication line.

[0009] Preferably, the wireless transmission unit includes a wireless transmission module U6, a USB interface, and a debugging interface. The USB_DP pin of the USB interface for differential communication is connected to a resistor R60, the USB_DM pin of the USB interface is connected to a resistor R59, and one ends of the resistor R59 and the resistor R60 are both connected to the control chip U5.

[0010] Preferably, the DC power input unit includes a power input protection module, a DCDC buck module, an external power supply, a battery switching module, an LDO buck module, and a battery charging module. The power input protection module is electrically connected to the DCDC buck module, the DCDC buck module is connected to the external power supply, the external power supply is connected to the battery switching module, the battery switching module is connected to the LDO buck module, and the LDO buck module is connected to the battery charging module.

[0011] Preferably, the battery power input unit includes a rechargeable lithium battery, and a connection terminal JP2 for connection to the processor is provided at one end of the rechargeable lithium battery.

[0012] Preferably, the processor includes a processor module U5 and a USB interface, and the processor module U5 controls the wireless transmission unit through the USB interface.

[0013] Preferably, the MBUS interface includes an MBUS conversion circuit for UART to MBUS. The MBUS conversion circuit includes a switching tube Q12 and a boost circuit mainly composed of a chip U20, a triode Q8, an inductor L6, and a diode D5. The boost circuit is electrically connected to the chip U20.

[0014] Preferably, the MODBUS interface includes a RS485 conversion circuit for UART to RS485. The RS485 conversion circuit includes a main RS485 connector J12, an RC filter circuit composed of a resistor R135, a resistor R136, a capacitor C62 and a capacitor C63, and a surge protection circuit mainly composed of diodes TVS7, diode TVS8 and diode TVS9. The RC filter circuit is connected to the surge protection circuit, and the surge protection circuit is connected to the RS485 connector J12.

[0015] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0016] The present utility model collects data through the interface unit and uploads it to the cloud service platform via the wireless transmission unit. At the same time, it receives the control instructions or control logic issued by the cloud service platform, and realizes the automatic control of the metering device through the cooperation of the controller and the control unit, without the need for personnel to perform simulation input operations through the keyboard and mouse, which is convenient for automated remote data collection and control. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is the system block diagram of the present utility model;

[0018] Figure 2 is the circuit diagram of the power input protection module of the present utility model;

[0019] Figure 3 is the circuit diagram of the DCDC step-down module of the present utility model;

[0020] Figure 4 is the circuit diagram of the LD0 step-down module of the present utility model;

[0021] Figure 5 is the circuit diagram of the battery charging module of the present utility model;

[0022] Figure 6 is the circuit diagram of the wireless transmission unit of the present utility model;

[0023] Figure 7 is the circuit diagram of the processor of the present utility model;

[0024] Figure 8 is the circuit diagram of the MBUS communication interface of the present utility model;

[0025] Figure 9 is the circuit diagram of the MODBUS communication interface of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0027] Please refer to Figures 1-9 , the present utility model provides a technical solution: a remote data acquisition and control device, including a controller and multiple meter heads connected to a metering device, and a control unit is connected to one end of each meter head; the controller includes a wireless transmission unit, a DC power input unit, a battery power supply input unit, a processor, a storage unit, and an interface unit. The interface unit, the storage unit, the wireless transmission unit, and the battery power supply input unit are all connected to the processor, and the DC power input unit is connected to the battery power supply input unit; the interface unit includes an MBUS interface, a MODBUS interface, and a DO interface. The MBUS interface and the MODBUS interface are bidirectionally connected to the processor, the DO interface is unidirectionally connected to the processor, the control unit is connected to the MBUS interface and the DO interface respectively through a communication line, and the meter head is connected to the MODBUS interface through a communication line; the MBUS interface and the MODBUS interface are data communication interfaces, and the DO interface is a logic output control port.

[0028] After the system is powered on, it reads the metering device data through the MBUS interface and the MODBUS interface according to the set detection interval and stores it, and uploads the locally collected and stored data according to the set upload interval. In the external power supply state, after the upload is completed, it receives the instructions sent by the platform in real time and executes them until the next upload. In the battery power supply state, each time after the upload is completed, it opens a receiving window for a certain period of time, receives the instructions sent by the platform and executes them, and enters the low-power sleep state after execution until the next reading or upload interval arrives. The control logic for reading the metering device data and inputting it into the local storage is used to output control signals through the MODBUS interface or the DO interface, and read the metering device data through the MBUS interface and the MODBUS interface, and upload the feedback control execution status, so as to realize the automatic control of the metering device without the need for personnel to perform simulation input operations through the keyboard and mouse, which is convenient for automatic remote data acquisition and control.

[0029] The DC power input unit includes a power input protection module, a DCDC buck module, an external power supply, a battery switching module, an LDO buck module, and a battery charging module. The power input protection module is electrically connected to the DCDC buck module, the DCDC buck module is connected to the external power supply, the external power supply is connected to the battery switching module, the battery switching module is connected to the LDO buck module, and the LDO buck module is connected to the battery charging module.

[0030] As Figure 2 shown, the power input protection module includes an input terminal JP1 and a common mode inductor CM1. One end of the input terminal JP1 is connected with a capacitor C1 and a capacitor C5. One end of the capacitor C1 is connected with a diode TVS1 and a fuse F1. One end of the fuse F1 is connected with a diode D1. One end of the diode D1 is connected with a capacitor C2. The capacitor C2 is connected in parallel on one side of the common mode inductor CM1. The other side of the common mode inductor CM1 is connected in parallel with a capacitor C3, a diode TVS2 and a capacitor C4. And a bead L1 is connected between the capacitor C3 and the diode TVS2. One end of the diode TVS1 is connected with a diode TVS3. One end of the diode TVS3 is connected in parallel with a resistor R1 and a diode TVS4.

[0031] The external DC power supply is input from the input terminal JP1, filtered by the capacitors C1 and C5, protected against lightning strikes by the diodes TVS1, TVS2 and TVS3, prevented from reverse connection by the fuse F1 and the diode D1, and then EMI-protected by the common mode inductor CM1, the capacitor C2, the capacitor C3 and the bead L1, and enters the input capacitor C4 to provide a stable power supply for the step-down chip U11 and the subsequent MBUS circuit.

[0032] As Figure 3As shown, the DCDC step-down module includes a step-down chip U11. The tenth pin of the step-down chip U11 is connected to an inductor L7 and a capacitor C77. One end of the capacitor C77 is connected to the first pin of the step-down chip U11. One end of the inductor L7 is connected to a capacitor PE1, a capacitor C79, resistors R191, R101, and R187 connected in series. One end of the capacitor C79 is connected to resistors R189 and R190 connected in series. The connection end of the resistors R189 and R190 is connected to a resistor R72. A diode D12 is connected between the ninth and tenth pins of the step-down chip U11. The eighth pin of the step-down chip U11 is connected in parallel with a capacitor C76 and capacitors C74 and a resistor R19 connected in series. The fifth pin of the step-down chip U11 is connected to a resistor R188. The fourth pin of the step-down chip U11 is connected to a capacitor C75. The second pin of the step-down chip U11 is connected to a capacitor C78 and resistors R186 and R185 connected in series. The connection end of the resistors R186 and R185 is connected to the third pin of the step-down chip U11. With the step-down chip U11, the diode D12, the inductor L7, and the peripheral resistors R185, R186 for low-voltage startup threshold setting, the capacitor C75 for soft-start setting, the resistor R188 for switching frequency setting, the capacitors C74, R19, C76 for compensation circuit, the resistors R191, R101, R187 for output voltage feedback, and the capacitor C77, a BUCK circuit is formed to step down the externally input direct current to 5V direct current and supply it to the system.

[0033] One path of the obtained 5V power supply passes through a resistor R16, is filtered by capacitors C20 and C21 connected in parallel, and then is connected to a charging management chip U3 for a 1-cell rechargeable lithium battery. A resistor R21 is connected to U3 for setting the charging current.

[0034] The battery power supply input unit includes a rechargeable lithium battery. One end of the rechargeable lithium battery is provided with a connection terminal JP2 for connecting to the processor, facilitating the connection of the battery to the connection terminal.

[0035] As Figure 4 shown, the LDO step-down module is mainly composed of an LDO step-down chip U2, an LDO step-down chip U4, and a MOS transistor Q1. The specific connection method is as shown in the figure. As Figure 5As shown in the figure, the battery charging module mainly consists of a charging management chip U3. Capacitors C20, C21 and resistor R16 are connected in parallel to the fourth pin of the charging management chip U3. Another path of the obtained 5V power supply passes through diode D2 and the battery, and is input together with the MOS transistor Q1 controlled by 5V to supply power to the subsequent LDO step-down chips U2, U4 and the wireless communication module LTE. When the 5V power supply exists, the MOS transistor Q1 is turned off, and the system is powered by 5V. When the external power supply is disconnected and the 5V voltage disappears, the MOS transistor Q1 is turned on, and the system is supplied with emergency power by the battery. The function of diode D2 is to prevent the battery from back-feeding to 5V, thereby increasing the battery loss and interfering with the power state detection composed of resistors R189 and R190.

[0036] The LDO step-down chips U2 and U4 step down the input of the previous stage 5V or battery to 3.3V or 1.8V levels to provide stable power for the CPU and the communication between the CPU and LTE.

[0037] As Figure 6 shown in the figure, the wireless transmission unit includes a wireless transmission module U6, a USB interface and a debugging interface. The USB_DP pin for differential communication of the USB interface is connected with a resistor R60, and the USB_DM pin of the USB interface is connected with a resistor R59. One ends of the resistor R59 and the resistor R60 are both connected to the control chip U5 to realize the communication between the control chip U5 and the wireless transmission module.

[0038] The debugging interface of the wireless transmission module U6 is at 1.8V level, which is connected to a level conversion circuit composed of Q6 and Q7, and is reserved for external debugging of the wireless transmission module U6.

[0039] As Figure 7 shown in the figure, the processor includes a processor module U5 and a USB interface. The processor module U5 controls the wireless transmission unit through the USB interface, and the UART asynchronous communication serial port of the processor module U5 is converted into an external communication interface through RS485 and MBUS.

[0040] As Figure 8As shown in the figure, it is a conversion circuit between UART and MBUS. The MBUS interface includes a MBUS conversion circuit between UART and MBUS. The MBUS conversion circuit includes a switching transistor Q12 and a boost circuit mainly composed of a chip U20, a triode Q8, an inductor L6, and a diode D5. The boost circuit is electrically connected to the chip U20. The TX signal of UART realizes the output conversion from the 24V of the external DC power supply and the output of 36V of the boost circuit composed of U20, Q8, L6, and D5 by controlling the switch of Q12, so as to realize the output conversion from the 3.3V TTL output of UART to the 24V and 36V level changes of MBUS, and at the same time meet the power supply to the external meter head and communication to the external meter head connection interface J11. The communication input of the small current change of the MBUS meter head is converted into a voltage fluctuation through J11 by R152 and R147, and then through the U27 operational amplifier circuit and the detection circuit composed of Q23, Q24, and Q25, and is converted into the TTL waveform of UART, so that the processor including the processor module U5 can identify it.

[0041] As Figure 9 As shown in the figure, it is a conversion circuit between UART and RS485. The MODBUS interface includes a RS485 conversion circuit between UART and RS485. The RS485 conversion circuit includes a main RS485 connector J12, an RC filter circuit composed of a resistor R135, a resistor R136, a capacitor C62, and a capacitor C63, and a surge protection circuit mainly composed of diodes TVS7, TVS8, and TVS9. The RC filter circuit is connected to the surge protection circuit, and the surge protection circuit is connected to the RS485 connector J12. The processor module U5 is connected to the ADM2483 integrating signal isolation and conversion to directly convert UART into RS485 communication signals. The differential signals RS485_A and RS485_B of RS485 pass through the RC filter circuit composed of R135, R136, C62, and C63 and the surge protection circuit composed of TVS7, TVS8, and TVS9 and are connected to the RS485 connector J12 to quickly connect to external RS485 devices.

[0042] In summary, data is collected through the interface unit and uploaded to the cloud service platform through the wireless transmission unit. At the same time, the control instructions or control logic issued by the cloud service platform are received, and the automatic control of the metering device is realized through the cooperation of the controller and the control unit, without the need for personnel to input operations through keyboard and mouse emulation, which is convenient for automated remote data collection and control.

[0043] Although embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A remote data acquisition and control device, comprising a controller and a plurality of meter heads connected to a metering device, characterized in that: One end of each meter head is connected to a control unit; The controller includes a wireless transmission unit, a DC power input unit, a battery power input unit, a processor, a storage unit and an interface unit, wherein the interface unit, the storage unit, the wireless transmission unit and the battery power input unit are all connected to the processor, and the DC power input unit is connected to the battery power input unit; The interface unit includes an MBUS interface, a MODBUS interface and a DO interface. The MBUS interface and the MODBUS interface are bidirectionally connected to the processor, and the DO interface is unidirectionally connected to the processor. The control unit is connected to the MBUS interface and the DO interface respectively through communication lines, and the meter head is connected to the MODBUS interface through a communication line.

2. A remote data acquisition and control device according to claim 1, characterized in that: The wireless transmission unit includes a wireless transmission module U6, a USB interface and a debugging interface. The USB_DP pin of the USB interface differential communication is connected to a resistor R60, and the USB_DM pin of the USB interface is connected to a resistor R59. One end of the resistor R59 and the resistor R60 are both connected to the control chip U5.

3. A remote data acquisition and control device according to claim 2, characterized in that: The DC power input unit includes a power input protection module, a DCDC step-down module, an external power supply, a battery switching module, an LDO step-down module and a battery charging module. The power input protection module is electrically connected to the DCDC step-down module, the DCDC step-down module is connected to the external power supply, the external power supply is connected to the battery switching module, the battery switching module is connected to the LDO step-down module, and the LDO step-down module is connected to the battery charging module.

4. A remote data acquisition and control device according to claim 3, characterized in that: The battery-powered input unit includes a rechargeable lithium battery. One end of the rechargeable lithium battery is provided with a connection terminal JP2 for connecting to a processor.

5. The remote data acquisition and control device according to claim 4, characterized in that: The processor includes a processor module U5 and a USB interface, and the processor module U5 is connected to control the wireless transmission unit via the USB interface.

6. The remote data acquisition and control device according to claim 5, characterized in that: The MBUS interface includes an MBUS conversion circuit for UART and MBUS. The MBUS conversion circuit includes a switch tube Q12 and a boost circuit mainly composed of a chip U20, a transistor Q8, an inductor L6 and a diode D5. The boost circuit is electrically connected to the chip U20.

7. The remote data acquisition and control device according to claim 6, characterized in that: The MODBUS interface includes an RS485 conversion circuit for UART to RS485, the RS485 conversion circuit includes a main RS485 connector J12, an RC filter circuit composed of a resistor R135, a resistor R136, a capacitor C62 and a capacitor C63, and a surge protection circuit mainly composed of a diode TVS7, a diode TVS8 and a diode TVS9, the RC filter circuit is connected to the surge protection circuit, and the surge protection circuit is connected to the RS485 connector J12.

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