Unmanned metering controller

Abstract

The utility model provides an unmanned metering controller, which relates to the technical field of industrial automation, and is characterized in that a serial port signal interaction end of a main control chip is connected with a signal interaction end of a serial port integrated circuit, and the serial port integrated circuit is connected with a plurality of external serial port devices; a network port interface of the network port circuit is connected with an external server, and a data interaction end of the network port circuit is connected with a data interaction end of the main control chip; and the power supply end of the voltage conversion circuit is connected with the power supply ends of the main control chip, the serial port integrated circuit and the network port circuit. The unmanned metering controller has the beneficial effects that the data of each device is uploaded to the server, and the control instruction of the server is distributed to each device through the unmanned metering controller. By using the unmanned metering controller, the on-site wiring workload can be greatly reduced. In addition, the matched control cabinet can use a small size specification, and the demand quantity of cables is also greatly reduced. And due to the compactness of the system, the failure rate of the system is further reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of industrial automation, in particular to an unmanned metering controller. Background Art

[0002] Unmanned metering involves many devices, including weighing sensors, QR code modules, printers, card readers, infrared gratings, etc. The data of these devices needs to be uploaded to the server, and they will also receive control instructions from the server. The traditional solution is to use X86 industrial computers + remote I / O modules to connect these devices. This method has many disadvantages. First, the cost is high. Secondly, on-site installation is more troublesome and requires more cables. Finally, maintenance is inconvenient.

[0003] Field devices usually require other conversion devices to connect to the controller. In addition, the supporting control cabinet also needs larger size specifications and a large amount of cables. Because the system is less compact, the system failure rate will also increase accordingly. Utility Model Content

[0004] In view of the problems existing in the prior art, the utility model provides an unmanned metering controller, comprising:

[0005] A main control chip, wherein a serial port signal interaction end of the main control chip is connected to a signal interaction end of a serial port integrated circuit, and the serial port integrated circuit is connected to a plurality of external serial port devices;

[0006] A network port circuit, wherein the network port interface of the network port circuit is connected to an external server, and the data interaction end of the network port circuit is connected to the data interaction end of the main control chip;

[0007] A voltage conversion circuit, wherein a power supply end of the voltage conversion circuit is connected to a battery, and a power supply end of the voltage conversion circuit is connected to power supply ends of the main control chip, the serial port integrated circuit and the network port circuit.

[0008] Preferably, the serial port signal interaction end of the main control chip includes a serial port signal receiving end and a serial port signal sending end, and the serial port integrated circuit includes a plurality of identical serial port sub-circuits, each of which includes:

[0009] A serial port chip, wherein the ninth pin of the serial port chip is connected to the serial port signal receiving end of the main control chip through a first connector, and the tenth pin of the serial port chip is connected to the serial port signal sending end of the main control chip through a second connector;

[0010] A plug, wherein the second pin of the plug is connected to the thirteenth pin of the serial port chip, and the third pin of the plug is connected to the fourteenth pin of the serial port chip;

[0011] A socket, wherein the second pin of the socket is connected to the seventh pin of the serial port chip, the third pin of the socket is connected to the eighth pin of the serial port chip, and the fifth pin of the socket is connected to the fifth pin of the plug and is grounded;

[0012] a first inductor, one end of which is respectively connected to the tenth and eleventh pins of the plug and the tenth and eleventh pins of the socket, and the other end of which is grounded;

[0013] The first pin and the third pin of the serial port chip are connected through a first capacitor, the fourth pin and the fifth pin of the serial port chip are connected through a second capacitor, the fifteenth pin of the serial port chip is connected to one end of the third capacitor and the fourth capacitor and is grounded, the other end of the third capacitor is connected to the second pin of the serial port chip, the other end of the fourth capacitor is connected to the sixth pin of the serial port chip, and the sixteenth pin of the serial port chip is connected to one end of the fifth capacitor and the power supply end of the voltage conversion circuit.

[0014] Preferably, the power supply end of the voltage conversion circuit includes a first power supply end and a second power supply end, and the voltage conversion circuit includes:

[0015] a first polarized capacitor, wherein a positive electrode of the first polarized capacitor is connected to the battery and one end of a first patch magnetic bead, and the other end of the first patch magnetic bead serves as the first power supply end;

[0016] a sixth capacitor, one end of which is connected to the other end of the first patch bead, one end of the seventh capacitor, and one end of the second patch bead, and the other end of which is connected to the other end of the seventh capacitor and one end of the third patch bead and is grounded;

[0017] An eighth capacitor, one end of the eighth capacitor is connected to the other end of the second patch bead and one end of the ninth capacitor, the other end of the eighth capacitor is connected to the other end of the third patch bead and the other end of the ninth capacitor and is grounded, and one end of the eighth capacitor serves as the second power supply end.

[0018] Preferably, the network port circuit includes:

[0019] The tenth pin of the network port interface is connected to one end of the first resistor and one end of the first bidirectional protection diode, the other end of the first resistor is connected to the twenty-first pin of the network port chip, the eleventh pin of the network port interface is connected to one end of the second resistor and one end of the second bidirectional protection diode, the other end of the second resistor is connected to the twenty-second pin of the network port chip, and the other ends of the first bidirectional protection diode and the second bidirectional protection diode are grounded;

[0020] A fourth patch magnetic bead, one end of the fourth patch magnetic bead is connected to the ninth and eleventh pins of the network port interface, the other end of the fourth patch magnetic bead is connected to one end of the tenth capacitor and the power supply end of the voltage conversion circuit, and the other end of the tenth capacitor is grounded;

[0021] a third resistor, one end of the third resistor being respectively connected to the fourth, fifth, seventh and eighth pins of the network port and one end of the first varistor, the other end of the third resistor being connected to one end of the eleventh capacitor, the other end of the eleventh capacitor being connected to the other end of the first varistor and being grounded;

[0022] A network transformer circuit, wherein a signal interaction end of the network transformer circuit is respectively connected to the first, second, third and sixth pins of the network port interface, and a data interaction end of the network transformer circuit is connected to the data interaction end of the network port driver chip;

[0023] The first pin, the eighteenth pin, the thirty-second pin, and the twenty-first to twenty-sixth pins of the network port driver chip are connected to the power supply end of the voltage conversion circuit;

[0024] The third to fifth pins, the thirty-sixth pin, the thirty-seventh pin, the thirty-second pin, the twenty-eighth pin, the twenty-fifth pin, the twenty-fourth pin, and the twenty-third pin of the network port driver chip are connected to the data interaction end of the main control chip.

[0025] Preferably, the network transformer circuit comprises:

[0026] A network transformer, wherein the ninth pin of the network transformer is connected to the sixth pin of the network port interface, the eleventh pin of the network transformer is connected to the third pin of the network port interface, the fourteenth pin of the network transformer is connected to the second pin of the network port interface, and the sixteenth pin of the network transformer is connected to the first pin of the network port interface;

[0027] a fourth resistor, one end of the fourth resistor being respectively connected to the fifteenth and tenth pins of the network transformer and one end of the second varistor, the other end of the fourth resistor being connected to one end of the twelfth capacitor, and the other end of the second varistor and the other end of the twelfth capacitor being grounded;

[0028] a fifth SMD bead, one end of which is respectively connected to the second pin, the seventh pin, one end of the thirteenth capacitor and one end of the fourteenth capacitor of the network transformer, the other end of the thirteenth capacitor and the other end of the fourteenth capacitor are grounded, and the other end of the fifth SMD bead is connected to the power supply end of the voltage conversion circuit;

[0029] The first pin, the third pin, the sixth pin and the eighth pin of the network transformer are respectively connected to one end of the fifth resistor, one end of the sixth resistor, one end of the seventh resistor and one end of the eighth resistor, the other ends of the fifth resistor and the sixth resistor are connected to and connected to the power supply end of the voltage conversion circuit, and the other ends of the seventh resistor and the eighth resistor are connected to and connected to the power supply end of the voltage conversion circuit;

[0030] The first pin of the network transformer is also connected to one end of a ninth resistor and one end of a fifteenth capacitor, and the other end of the ninth resistor is connected to the fifteenth pin of the network port driver chip;

[0031] The third pin of the network transformer is also connected to one end of the tenth resistor and one end of the sixteenth capacitor, and the other end of the tenth resistor is connected to the fourteenth pin of the network port driver chip;

[0032] The sixth pin of the network transformer is also connected to one end of the eleventh resistor and one end of the seventeenth capacitor, and the other end of the eleventh resistor is connected to the twelfth pin of the network port driver chip;

[0033] The eighth pin of the network transformer is also connected to one end of a twelfth resistor and one end of an eighteenth capacitor, and the other end of the twelfth resistor is connected to the eleventh pin of the network port driver chip;

[0034] The other ends of the fifteenth capacitor, the sixteenth capacitor, the seventeenth capacitor and the eighteenth capacitor are grounded.

[0035] Preferably, it also includes a transient suppression diode array, wherein the first pin of the transient suppression diode array is connected to the first pin of the network port driver chip, the third pin of the transient suppression diode array is connected to the eighth pin of the network port driver chip, the sixth pin of the transient suppression diode array is connected to the third pin of the network port driver chip, the fourth pin of the transient suppression diode array is connected to the sixth pin of the network port driver chip, and the second pin of the transient suppression diode array is grounded.

[0036] Preferably, it also includes a switch input and output circuit, including:

[0037] A switch quantity input circuit connected to the switch quantity input terminal of the main control chip through a relay isolation circuit;

[0038] The switch output circuit is connected to the switch output terminal of the main control chip through an optical coupling isolation circuit.

[0039] Preferably, a USB circuit is also included, including:

[0040] A USB interface, wherein the first pin of the USB interface is connected to one end of a nineteenth capacitor, one end of the nineteenth capacitor is connected to the fourth pin of the USB interface and one end of a second inductor and is grounded, the other end of the second inductor is connected to the fifth pin and the sixth pin of the USB interface, and the second pin and the third pin of the USB interface are connected to the USB data interaction end of the main control chip.

[0041] The above technical solution has the following advantages or beneficial effects: a rich external interface is provided on the unmanned metering controller through the serial port integrated circuit to meet the simultaneous access of multiple devices. The on-site equipment can directly access the controller without any conversion equipment, and the network port circuit is connected to the external server. The data of each device is uploaded to the server through the unmanned metering controller, and the control instructions of the server are distributed to each device. The use of the unmanned metering controller will greatly reduce the wiring workload on site. In addition, the supporting control cabinet can use small size specifications, and the demand for cables is also greatly reduced. Because of the compactness of the system, the system failure rate is also further reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 This is a structural schematic diagram of an unmanned metering controller in a preferred embodiment of the utility model;

[0043] Figure 2 This is a structural diagram of a serial port sub-circuit in a preferred embodiment of the utility model;

[0044] Figure 3 This is a schematic diagram of the structure of a voltage conversion circuit in a preferred embodiment of the utility model;

[0045] Figure 4 This is a structural diagram of a network port circuit in a preferred embodiment of the present utility model;

[0046] Figure 5 This is a pin diagram of the network port driver chip in a preferred embodiment of the utility model;

[0047] Figure 6 This is a structural diagram of a network voltage conversion circuit in a preferred embodiment of the utility model;

[0048] Figure 7 This is a schematic structural diagram of a transient suppression diode array in a preferred embodiment of the utility model;

[0049] Figure 8 This is a schematic diagram of the USB circuit structure in a preferred embodiment of the utility model. DETAILED DESCRIPTION

[0050] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. The present invention is not limited to the implementation mode, and other implementation modes may also fall within the scope of the present invention as long as they meet the purpose of the present invention.

[0051] In a preferred embodiment of the present utility model, based on the above problems existing in the prior art, an unmanned metering controller is provided. Figure 1 As shown, including:

[0052] A main control chip 1, wherein a serial port signal interaction end of the main control chip 1 is connected to a signal interaction end of a serial port integrated circuit 2, and the serial port integrated circuit 2 is connected to a plurality of external serial port devices 3;

[0053] A network port circuit 4, wherein the network port interface of the network port circuit 4 is connected to an external server 5, and a data interaction end of the network port circuit 4 is connected to a data interaction end of the main control chip 1;

[0054] The voltage conversion circuit 6 has a power supply end connected to the battery 7 , and a power supply end connected to the main control chip 1 , the serial port integrated circuit 2 and the network port circuit 4 .

[0055] In a preferred embodiment of the utility model, the serial port signal interaction end of the main control chip 1 includes a serial port signal receiving end and a serial port signal sending end, and the serial port integrated circuit 2 includes a plurality of identical serial port sub-circuits, each of which includes:

[0056] The serial port chip U1, the ninth pin of the serial port chip U1 is connected to the serial port signal receiving terminal PB11 of the main control chip 1 through the first connector J1, and the tenth pin of the serial port chip U1 is connected to the serial port signal sending terminal PB10 of the main control chip 1 through the second connector J2;

[0057] Socket CON1, the second pin of the socket CON1 is connected to the seventh pin of the serial port chip U1, the third pin of the socket CON1 is connected to the eighth pin of the serial port chip, and the fifth pin of the socket CON1 is connected to the fifth pin of the plug CON2 and grounded;

[0058] Plug CON2, the second pin of the plug CON2 is connected to the thirteenth pin of the serial port chip U1, and the third pin of the plug CON2 is connected to the fourteenth pin of the serial port chip U1;

[0059] a first inductor L1, one end of which is respectively connected to the tenth and eleventh pins of the plug CON2 and the tenth and eleventh pins of the socket CON2, and the other end of which is grounded;

[0060] The first pin and the third pin of the serial port chip U1 are connected through the first capacitor C1, the fourth pin and the fifth pin of the serial port chip U1 are connected through the second capacitor C2, the fifteenth pin of the serial port chip U1 is connected to one end of the third capacitor C3 and the fourth capacitor C4 and is grounded, the other end of the third capacitor C3 is connected to the second pin of the serial port chip U1, the other end of the fourth capacitor C4 is connected to the sixth pin of the serial port chip U1, and the sixteenth pin of the serial port chip U1 is connected to one end of the fifth capacitor C5 and the power supply end 3.3V of the voltage conversion circuit 6.

[0061] Specifically, in this embodiment, the plurality of serial port integrated circuits 2 include a plurality of serial port sub-circuits. In this embodiment, each serial port sub-circuit is preferably configured as 1 CAN bus serial port, 2 RS-232 serial ports, and 6 RS-485 serial ports, which are respectively connected to a plurality of external serial port devices involved in unmanned metering;

[0062] like Figure 2 As shown, taking the RS-232 serial port as an example, in this embodiment, the serial port chip U1 preferably adopts the MAX3232CSE chip, and each serial port sub-circuit is provided with a socket CON1 and a plug CON2, providing two plug-in modes, which is suitable for more devices, and sends the hardware data uploaded by the device to the serial port signal interaction end of the main control chip U1 to achieve device access. The controller can be accessed without additional conversion equipment, so that the control cabinet supporting the original unmanned metering controller only needs a smaller size specification, and the demand for cables is also greatly reduced. Because the compactness of the system is improved, the system failure rate will also decrease accordingly.

[0063] In a preferred embodiment of the present invention, the power supply end of the voltage conversion circuit 6 includes a first power supply end DC3.3V and a second power supply end A3V3. Figure 3 As shown, the voltage conversion circuit 6 includes:

[0064] A first polar capacitor EC1, wherein the positive electrode of the first polar capacitor EC1 is connected to a battery VCC and one end of a first patch magnetic bead FB1, and the other end of the first patch magnetic bead FB1 serves as a first power supply end DC3.3V;

[0065] A sixth capacitor C6, one end of the sixth capacitor C6 is connected to the other end of the first patch magnetic bead FB1, one end of the seventh capacitor C7, and one end of the second patch magnetic bead FB2, and the other end of the sixth capacitor C6 is connected to the other end of the seventh capacitor C7 and one end of the third patch magnetic bead FB3 and is grounded;

[0066] The eighth capacitor C8, one end of the eighth capacitor is connected to the other end of the second chip bead FB2 and one end of the ninth capacitor C9, the other end of the eighth capacitor C8 is connected to the other end of the third chip bead FB3 and the other end of the ninth capacitor C9 and is grounded, and one end of the eighth capacitor C8 serves as the second power supply end A3V3.

[0067] Specifically, in this embodiment, the voltage provided by the battery is converted into DC 3.3V and AC 3.3V by the voltage conversion circuit 6, and the first power supply end and the second power supply end respectively provide power to the main control chip 1, the serial port integrated circuit 2 and the network port circuit 4.

[0068] In a preferred embodiment of the present invention, Figure 4 As shown, the network port circuit 4 includes:

[0069] The tenth pin of the network port interface RJ2 is connected to one end of the first resistor R1 and one end of the first bidirectional protection diode TVS1, the other end of the first resistor R1 is connected to the twenty-first pin of the network port chip U2, the eleventh pin of the network port interface RJ2 is connected to one end of the second resistor R2 and one end of the second bidirectional protection diode TVS2, the other end of the second resistor R2 is connected to the twenty-second pin of the network port chip U2, and the other ends of the first bidirectional protection diode TVS1 and the second bidirectional protection diode TVS2 are grounded;

[0070] A fourth patch bead FB4, one end of the fourth patch bead FB4 is connected to the ninth and eleventh pins of the network interface RJ2, the other end of the fourth patch bead FB4 is connected to one end of the tenth capacitor C10 and the power supply end DC3.3V of the voltage conversion circuit, and the other end of the tenth capacitor C10 is grounded;

[0071] a third resistor R3, one end of the third resistor R3 is respectively connected to the fourth, fifth, seventh and eighth pins of the network interface RJ2 and one end of the first varistor VR, the other end of the third resistor is connected to one end of the eleventh capacitor, the other end of the eleventh capacitor C11 is connected to the other end of the first varistor VR1 and grounded;

[0072] A network transformer circuit, wherein a signal interaction end of the network transformer circuit is respectively connected to the first, second, third and sixth pins of the network port interface RJ2, and a data interaction end of the network transformer circuit is connected to the data interaction end of the network port driver chip;

[0073] The first pin, the eighteenth pin, the thirty-second pin, and the twenty-first to twenty-sixth pins of the network port driver chip U2 are connected to the power supply end of the voltage conversion circuit 6;

[0074] Specifically, in this embodiment, the eighteenth pin of the network port driver chip U2 is connected to the second power supply terminal A3V3 of the voltage conversion circuit 6 , and the remaining pins connected to the power supply terminals are connected to the first power supply terminal DC3.3V of the voltage conversion circuit 6 .

[0075] The third to fifth pins PB11-PB13, the thirty-sixth pin PC4, the thirty-seventh pin PC5, the thirty-second pin PA7, the twenty-eighth pin PA1, the twenty-fifth pin PC1, the twenty-fourth pin PA2, and the twenty-third pin PB1 of the network port driver chip U2 are connected to the data interaction end of the main control chip U1.

[0076] Specifically, in this embodiment, some pins of the network port driver chip U2 are connected to resistors, capacitors, diodes and other electronic components, which are all conventional chip-connected protection electronic components and belong to basic technology. They are not described separately here. Figure 5 No additional marking is done.

[0077] In a preferred embodiment of the present invention, Figure 6 As shown, the network transformer circuit includes:

[0078] The network transformer TR, the ninth pin RX- of the network transformer TR is connected to the sixth pin of the network port interface RJ2, the eleventh pin RX+ of the network transformer TR is connected to the third pin of the network port interface RJ2, the fourteenth pin TX- of the network transformer TR is connected to the second pin of the network port interface RJ2, and the sixteenth pin TX+ of the network transformer TR is connected to the first pin of the network port interface RJ2;

[0079] Among them, TX+ (Transmit Positive): transmit positive pole.

[0080] TX-(Transmit Negative): Transmit negative pole.

[0081] RX+ (Receive Positive): Receive positive.

[0082] RX-(Receive Negative): Receive negative pole.

[0083] TX+ and TX- are the transmitting end, used to send data signals, while RX+ and RX- are the receiving end, used to receive data signals. These pins are common in communication interfaces and are used to achieve data communication between devices.

[0084] a fourth resistor R4, one end of the fourth resistor R4 is respectively connected to the fifteenth and tenth pins of the network transformer TR and one end of the second varistor VR2, the other end of the fourth resistor R4 is connected to one end of the twelfth capacitor C12, and the other end of the second varistor VR2 and the other end of the twelfth capacitor C12 are grounded;

[0085] A fifth patch bead FB5, one end of the fifth patch bead FB5 is respectively connected to the second pin, the seventh pin, one end of the thirteenth capacitor C13 and one end of the fourteenth capacitor C14 of the network transformer TR, the other end of the thirteenth capacitor C13 and the other end of the fourteenth capacitor C14 are grounded, and the other end of the fifth patch bead FB5 is connected to the power supply end DC3.3V of the voltage conversion circuit 6;

[0086] The first pin, the third pin, the sixth pin and the eighth pin of the network transformer TR are respectively connected to one end of the fifth resistor R5, one end of the sixth resistor R6, one end of the seventh resistor R7 and one end of the eighth resistor R8, the other ends of the fifth resistor R5 and the sixth resistor R6 are connected to and connected to the power supply end DC3.3V of the voltage conversion circuit, and the other ends of the seventh resistor R7 and the eighth resistor R8 are connected to and connected to the power supply end DC3.3V of the voltage conversion circuit;

[0087] The first pin TD+ of the network transformer TR is also connected to one end of the ninth resistor R9 and one end of the fifteenth capacitor C15, and the other end MDITP of the ninth resistor R9 is connected to the fifteenth pin of the network port driver chip U2;

[0088] The third pin TD- of the network transformer TR is also connected to one end of the tenth resistor R10 and one end of the sixteenth capacitor C16, and the other end MDITN of the tenth resistor R10 is connected to the fourteenth pin of the network port driver core U2;

[0089] The sixth pin RD+ of the network transformer TR is also connected to one end of the eleventh resistor R11 and one end of the seventeenth capacitor C17, and the other end MDIRP of the eleventh resistor R11 is connected to the twelfth pin of the network port driver chip U2;

[0090] The eighth pin RD- of the network transformer TR is also connected to one end of the twelfth resistor R12 and one end of the eighteenth capacitor C18, and the other end MDIRN of the twelfth resistor R12 is connected to the eleventh pin of the network port driver chip U2;

[0091] The other ends of the fifteenth capacitor C15, the sixteenth capacitor C16, the seventeenth capacitor C17 and the eighteenth capacitor C18 are grounded.

[0092] Specifically, the pin diagram of the network port driver chip U2 is as follows: Figure 5 shown.

[0093] The external server 5 is connected to the network port interface RJ2 of the network port circuit to achieve connection with the unmanned metering controller. The control instructions issued by the server 5 are sent to the network port driver chip U2 through the network interface RJ2 through the network transformer circuit. The network port driver chip forwards the control instructions to the corresponding serial port device 3 through the main control chip U1; the network transformer circuit plays the role of signal coupling and isolation, which can protect the circuit from electrical noise and interference, and improve the stability and reliability of data transmission. Therefore, the network transformer in this embodiment preferably adopts the H1601CE network transformer, which can be widely used in various Ethernet-based network devices and communication systems, such as switches, routers, servers, workstations, etc.

[0094] In a preferred embodiment of the present invention, Figure 7 As shown, it also includes a transient suppression diode array TVSA, the first pin of the transient suppression diode array TVSA is connected to the first pin of the network port driver chip U2, the third pin of the transient suppression diode array TVSA is connected to the eighth pin of the network port driver chip U2, the sixth pin of the transient suppression diode array TVSA is connected to the third pin of the network port driver chip U2, the fourth pin of the transient suppression diode array TVSA is connected to the sixth pin of the network port driver chip U2, and the second pin of the transient suppression diode array TVSA is grounded.

[0095] Specifically, in this embodiment, a transient suppression diode array TVSA is also included. The transient suppression diode array TVSA is an electronic component used to protect the circuit. Its main function is to guide the excessive voltage to the ground line or power line when the transient voltage is too high in the circuit to protect other components in the circuit from damage. In this embodiment, it is used to protect the network transformer circuit.

[0096] Transient suppression diode array TVSA plays a very important role in the circuit. It can effectively protect other components in the circuit from damage by transient voltage, thereby improving the reliability and stability of the circuit.

[0097] In a preferred embodiment of the present invention, Figure 1 As shown, it also includes a switch input and output circuit 8, including:

[0098] The switch quantity input circuit 81 is connected to the switch quantity input terminal of the main control chip U1 through the relay isolation circuit 82;

[0099] The switch output circuit 83 is connected to the switch output terminal of the main control chip U2 through the optical coupling isolation circuit 84.

[0100] Specifically, this embodiment also provides DI (switch input circuit 81) and DO (switch output circuit 83) for receiving digital signals from traffic lights, gratings, etc. on site. DO uses relay isolation to provide 8-way dry contact signals; DI uses optocoupler isolation to simultaneously access 8-way dry contact signals. This expands the types of devices that can be connected.

[0101] In a preferred embodiment of the present invention, Figure 8 As shown, a USB circuit 9 is also included, including:

[0102] USB interface USB, a first pin of the USB interface USB is connected to one end of the nineteenth capacitor C19, one end of the nineteenth capacitor C19 is connected to the fourth pin of the USB interface USB and one end of the second inductor L2 and is grounded, the other end of the second inductor L2 is connected to the fifth pin and the sixth pin of the USB interface USB, and the second pin and the third pin of the USB interface USB are connected to the USB data interaction terminals PA11 and PA12 of the main control chip U1.

[0103] Specifically, in this embodiment, the unmanned metering controller is also provided with a USB interface that can be connected to an ID card reader, printer, etc. that use a USB interface, thereby ensuring the applicability of the controller in different scenarios.

[0104] In general, the unmanned metering controller of the utility model integrates multiple serial ports, switch input and output interfaces and USB interfaces, which can directly connect multiple external devices involved in unmanned metering, send the uploaded hardware data to the server through the unmanned metering controller, and distribute the control instructions issued by the server to the corresponding devices.

[0105] The unmanned metering controller provides a rich set of external interfaces through the serial port integrated circuit to meet the simultaneous access of multiple devices. On-site devices no longer need any conversion equipment to directly access the controller. The use of this unmanned metering controller will greatly reduce the wiring workload on site. In addition, the supporting control cabinet can use small-sized specifications, and the demand for cables is also greatly reduced. Because of the compactness of the system, the system failure rate is also further reduced.

[0106] The above are only preferred embodiments of the present invention, and are not intended to limit the implementation methods and protection scope of the present invention. Those skilled in the art should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the contents of this specification and illustrations should be included in the protection scope of the present invention.

Claims

1. An unmanned metering controller, characterized in that: include: A main control chip, wherein a serial port signal interaction end of the main control chip is connected to a signal interaction end of a serial port integrated circuit, and the serial port integrated circuit is connected to a plurality of external serial port devices; A network port circuit, wherein the network port interface of the network port circuit is connected to an external server, and the data interaction end of the network port circuit is connected to the data interaction end of the main control chip; A voltage conversion circuit, wherein a power supply end of the voltage conversion circuit is connected to a battery, and a power supply end of the voltage conversion circuit is connected to power supply ends of the main control chip, the serial port integrated circuit and the network port circuit.

2. The unmanned metering controller according to claim 1, characterized in that: The serial port signal interaction end of the main control chip includes a serial port signal receiving end and a serial port signal sending end, and the serial port integrated circuit includes a plurality of identical serial port sub-circuits, each of which includes: A serial port chip, wherein the ninth pin of the serial port chip is connected to the serial port signal receiving end of the main control chip through a first connector, and the tenth pin of the serial port chip is connected to the serial port signal sending end of the main control chip through a second connector; A plug, wherein the second pin of the plug is connected to the thirteenth pin of the serial port chip, and the third pin of the plug is connected to the fourteenth pin of the serial port chip; A socket, wherein the second pin of the socket is connected to the seventh pin of the serial port chip, the third pin of the socket is connected to the eighth pin of the serial port chip, and the fifth pin of the socket is connected to the fifth pin of the plug and is grounded; a first inductor, one end of which is respectively connected to the tenth and eleventh pins of the plug and the tenth and eleventh pins of the socket, and the other end of which is grounded; The first pin and the third pin of the serial port chip are connected through a first capacitor, the fourth pin and the fifth pin of the serial port chip are connected through a second capacitor, the fifteenth pin of the serial port chip is connected to one end of the third capacitor and the fourth capacitor and is grounded, the other end of the third capacitor is connected to the second pin of the serial port chip, the other end of the fourth capacitor is connected to the sixth pin of the serial port chip, and the sixteenth pin of the serial port chip is connected to one end of the fifth capacitor and the power supply end of the voltage conversion circuit.

3. The unmanned metering controller according to claim 1, characterized in that: The power supply end of the voltage conversion circuit includes a first power supply end and a second power supply end, and the voltage conversion circuit includes: a first polarized capacitor, wherein a positive electrode of the first polarized capacitor is connected to the battery and one end of a first patch magnetic bead, and the other end of the first patch magnetic bead serves as the first power supply end; a sixth capacitor, one end of which is connected to the other end of the first patch bead, one end of the seventh capacitor, and one end of the second patch bead, and the other end of which is connected to the other end of the seventh capacitor and one end of the third patch bead and is grounded; An eighth capacitor, one end of the eighth capacitor is connected to the other end of the second patch bead and one end of the ninth capacitor, the other end of the eighth capacitor is connected to the other end of the third patch bead and the other end of the ninth capacitor and is grounded, and one end of the eighth capacitor serves as the second power supply end.

4. The unmanned metering controller according to claim 1, characterized in that: The network port circuit comprises: The tenth pin of the network port interface is connected to one end of the first resistor and one end of the first bidirectional protection diode, the other end of the first resistor is connected to the twenty-first pin of the network port chip, the eleventh pin of the network port interface is connected to one end of the second resistor and one end of the second bidirectional protection diode, the other end of the second resistor is connected to the twenty-second pin of the network port chip, and the other ends of the first bidirectional protection diode and the second bidirectional protection diode are grounded; A fourth patch magnetic bead, one end of the fourth patch magnetic bead is connected to the ninth and eleventh pins of the network port interface, the other end of the fourth patch magnetic bead is connected to one end of the tenth capacitor and the power supply end of the voltage conversion circuit, and the other end of the tenth capacitor is grounded; a third resistor, one end of the third resistor being respectively connected to the fourth, fifth, seventh and eighth pins of the network port and one end of the first varistor, the other end of the third resistor being connected to one end of the eleventh capacitor, the other end of the eleventh capacitor being connected to the other end of the first varistor and being grounded; A network transformer circuit, wherein a signal interaction end of the network transformer circuit is respectively connected to the first, second, third and sixth pins of the network port interface, and a data interaction end of the network transformer circuit is connected to the data interaction end of the network port driver chip; The first pin, the eighteenth pin, the thirty-second pin, and the twenty-first to twenty-sixth pins of the network port driver chip are connected to the power supply end of the voltage conversion circuit; The third to fifth pins, the thirty-sixth pin, the thirty-seventh pin, the thirty-second pin, the twenty-eighth pin, the twenty-fifth pin, the twenty-fourth pin, and the twenty-third pin of the network port driver chip are connected to the data interaction end of the main control chip.

5. The unmanned metering controller according to claim 4, characterized in that: The network voltage transformation circuit comprises: A network transformer, wherein the ninth pin of the network transformer is connected to the sixth pin of the network port interface, the eleventh pin of the network transformer is connected to the third pin of the network port interface, the fourteenth pin of the network transformer is connected to the second pin of the network port interface, and the sixteenth pin of the network transformer is connected to the first pin of the network port interface; a fourth resistor, one end of the fourth resistor being respectively connected to the fifteenth and tenth pins of the network transformer and one end of the second varistor, the other end of the fourth resistor being connected to one end of the twelfth capacitor, and the other end of the second varistor and the other end of the twelfth capacitor being grounded; a fifth SMD bead, one end of which is respectively connected to the second pin, the seventh pin, one end of the thirteenth capacitor and one end of the fourteenth capacitor of the network transformer, the other end of the thirteenth capacitor and the other end of the fourteenth capacitor are grounded, and the other end of the fifth SMD bead is connected to the power supply end of the voltage conversion circuit; The first pin, the third pin, the sixth pin and the eighth pin of the network transformer are respectively connected to one end of the fifth resistor, one end of the sixth resistor, one end of the seventh resistor and one end of the eighth resistor, the other ends of the fifth resistor and the sixth resistor are connected to and connected to the power supply end of the voltage conversion circuit, and the other ends of the seventh resistor and the eighth resistor are connected to and connected to the power supply end of the voltage conversion circuit; The first pin of the network transformer is also connected to one end of a ninth resistor and one end of a fifteenth capacitor, and the other end of the ninth resistor is connected to the fifteenth pin of the network port driver chip; The third pin of the network transformer is also connected to one end of the tenth resistor and one end of the sixteenth capacitor, and the other end of the tenth resistor is connected to the fourteenth pin of the network port driver chip; The sixth pin of the network transformer is also connected to one end of the eleventh resistor and one end of the seventeenth capacitor, and the other end of the eleventh resistor is connected to the twelfth pin of the network port driver chip; The eighth pin of the network transformer is also connected to one end of a twelfth resistor and one end of an eighteenth capacitor, and the other end of the twelfth resistor is connected to the eleventh pin of the network port driver chip; The other ends of the fifteenth capacitor, the sixteenth capacitor, the seventeenth capacitor and the eighteenth capacitor are grounded.

6. The unmanned metering controller according to claim 5, characterized in that: It also includes a transient suppression diode array, wherein the first pin of the transient suppression diode array is connected to the first pin of the network port driver chip, the third pin of the transient suppression diode array is connected to the eighth pin of the network port driver chip, the sixth pin of the transient suppression diode array is connected to the third pin of the network port driver chip, the fourth pin of the transient suppression diode array is connected to the sixth pin of the network port driver chip, and the second pin of the transient suppression diode array is grounded.

7. The unmanned metering controller according to claim 1, characterized in that: It also includes switch input and output circuits, including: A switch quantity input circuit connected to the switch quantity input terminal of the main control chip through a relay isolation circuit; The switch output circuit is connected to the switch output terminal of the main control chip through an optical coupling isolation circuit.

8. The unmanned metering controller according to claim 1, characterized in that: Also included is the USB circuit, including: A USB interface, wherein the first pin of the USB interface is connected to one end of a nineteenth capacitor, one end of the nineteenth capacitor is connected to the fourth pin of the USB interface and one end of a second inductor and is grounded, the other end of the second inductor is connected to the fifth pin and the sixth pin of the USB interface, and the second pin and the third pin of the USB interface are connected to the USB data interaction end of the main control chip.

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