Direct current monitoring device with switching value detection

Abstract

The utility model discloses a direct current monitoring device with switching value detection, which comprises a shell, a touch screen, a control mainboard and an external terminal, and a microcomputer processor, an alternating current acquisition circuit, a direct current acquisition circuit, a switching value acquisition circuit, an external control circuit, a communication circuit, a power supply circuit and a buzzer are distributed on the control mainboard. The touch screen is installed on the front face of the outer shell, the control mainboard is arranged at the rear end of the touch screen, the rear end of the control mainboard is the back face of the outer shell, the back face of the outer shell is provided with a wiring terminal, and 24-way switching values and the running state of equipment can be detected.

Description

TECHNICAL FIELD

[0001] The utility model relates to a monitoring device, specifically a direct current monitoring device with on-off quantity detection. BACKGROUND

[0002] The direct current screen is the abbreviation of the direct current operating power supply system, and is commonly known as the intelligent maintenance-free direct current power supply screen. The power operating power supply in the power plant and the transformer substation adopts the direct current power supply at present, and the direct current screen provides the power supply for the control load, the power load and the like, is the basis of the contemporary power system control and protection, is one of the indispensable equipment in the transformer substation, is a new type of direct current system of digital control, protection, management and measurement. The direct current screen is composed of a monitoring unit, a charging module unit, a voltage reduction silicon chain unit, a direct current feeder unit, a battery inspection unit and an insulation monitoring unit. At present, the direct current monitoring device is limited by the volume, generally does not have the on-off quantity detection function, needs to be additionally provided with the on-off quantity detection unit, and the increase of components will bring the increase of cost and the increase of failure rate, and simultaneously increases the workload of the later maintenance. SUMMARY

[0003] The utility model discloses a direct current monitoring device with on-off quantity detection can detect 24 on-off quantities, and the state of the detection equipment operation.

[0004] In order to solve the above technical problem, the utility model adopts the technical scheme that:

[0005] The utility model discloses a direct current monitoring device with on-off quantity detection, including the shell, touch -sensitive screen, control mainboard and external terminal, wherein the microcomputer processor, alternating current acquisition circuit, direct current acquisition circuit, external control circuit, communication circuit, power supply circuit and buzzer are distributed on the control mainboard, still install the on-off quantity acquisition circuit on the control mainboard, the touch -sensitive screen is installed at the front of the shell, and the control mainboard is set up at the back end of the touch -sensitive screen, and the back end of the control mainboard is the back of the shell, and the back of the shell is equipped with the terminal.

[0006] Further, the alternating current acquisition circuit collects alternating voltage through an alternating voltage transformer, processes and converts the collected alternating voltage data and sends them into the microcomputer processor; the direct current acquisition circuit collects direct current voltage through resistance voltage reduction and collects direct current through an external current transformer, processes and converts the collected direct current voltage and direct current data and sends them into the microcomputer processor; the on-off quantity acquisition circuit collects through optical coupling isolation and sends into the microcomputer processor through a channel switch.

[0007] Further, the external control circuit, the on-off quantity acquisition circuit, the direct current acquisition circuit, the alternating current acquisition circuit and the communication circuit are connected with the terminal respectively.

[0008] Further, the power supply circuit provides power supply for the communication circuit, the AC acquisition circuit, the DC acquisition circuit, the external control circuit, the microcomputer processor, the buzzer and the switching value acquisition circuit.

[0009] Further, the external control circuit and the switching value acquisition circuit are connected with the wiring terminal at the lower end, and the DC acquisition circuit, the AC acquisition circuit and the communication circuit are connected with the wiring terminal at the upper end.

[0010] Further, the communication circuit is connected with the wiring terminal and the microcomputer processor, and the communication circuit comprises internal communication and external communication, and the communication circuit transmits data through the RS485 transceiver and communicates in the form of RS485 through the modbus protocol.

[0011] Further, the power supply circuit converts the externally input power supply into 12V and 5V power supply required by each functional circuit on the control mainboard.

[0012] Further, the touch screen is connected with the control mainboard through the wire harness, and each component on the control mainboard is connected through the functional circuit; and the wiring terminal is connected with the terminal base on the control mainboard.

[0013] The utility model has the advantages of:

[0014] The utility model sets the switching value acquisition circuit in the DC monitoring equipment, can detect the equipment running state, and realizes fault alarm. DRAWINGS

[0015] The utility model will be further explained in detail in combination with the drawings and specific embodiments.

[0016] Figure 1 It is system connection block diagram of the utility model.

[0017] Figure 2 It is front structure schematic view of the utility model.

[0018] Figure 3 It is mainboard structure schematic view of the utility model.

[0019] Figure 4 It is back structure schematic view of the utility model.

[0020] Figure 5 It is circuit diagram of switching value acquisition circuit of the utility model. SPECIFIC EMBODIMENT

[0021] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. The components of the embodiments of the utility model described and shown in the drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the claimed utility model, but only represents selected embodiments of the utility model. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the utility model protection.

[0022] As shown in the figure, the utility model discloses a kind of DC monitoring device with switch quantity detection, including shell 1, touch screen 2, control mainboard 10 and external terminal 21, wherein control mainboard 10 is distributed with various components and functional circuit, including microcomputer processor 11, alternating current acquisition circuit 13, direct current acquisition circuit 14, switch quantity acquisition circuit 17, external control circuit 16, communication circuit 15, power supply circuit 12 and buzzer 19, functional circuit includes alternating current acquisition circuit 13, direct current acquisition circuit 14, switch quantity acquisition circuit 17, external control circuit 16, communication circuit 15, power supply circuit 12, microcomputer processor 11 and buzzer 19 are components.

[0023] Touch screen 2 is installed on the front of shell 1, control mainboard 10 is arranged at the rear end of touch screen 2, the rear end of control mainboard 10 is the back of shell 1, and the back of shell 1 is provided with terminal 21.

[0024] Touch screen 2 is used for man-machine interaction, and each basic parameter of the utility model is set by touch screen 2, and the parameters mainly include alarm threshold of each group of voltage, alarm threshold of each group of current, alarm threshold of each group of switch quantity and various parameters of battery automatic charging and the like information, while touch screen 2 can display each information of system in real time, and interface is friendly.

[0025] In an embodiment of the utility model, the alternating current acquisition circuit 13 is collected by alternating voltage transformer, and the collected alternating voltage data is sent into microcomputer processor 11 after processing and conversion;The direct current acquisition circuit 14 is collected by resistance voltage reduction, and is collected by external current transformer, and the collected direct current voltage and direct current data are sent into microcomputer processor 11 after processing and conversion;The switch quantity acquisition circuit 17 is collected by photo-coupler isolation, and is sent into microcomputer processor 11 by channel switch. The channel switch here is CD4051 eight-channel switch.

[0026] The AC collection circuit is collected through an AC voltage transformer, the input high voltage enters the voltage transformer through a current-limiting resistor, the voltage transformer outputs a current signal converted into a voltage signal through a sampling resistor, and the voltage signal is sent to a rear end, and finally the collected AC voltage is sent to a microprocessor.

[0027] The DC voltage collection circuit is DC voltage which is reduced to low voltage through several voltage reduction resistors, is sent to a rear end CD4051 eight-channel switch, and finally the collected AC voltage is sent to a microprocessor.

[0028] The DC current circuit is a current signal converted into a voltage signal through an external current sampling box, is connected to an input terminal, and is finally sent to a microprocessor.

[0029] In an embodiment of the utility model, external control circuit 16, switch value collection circuit 17, DC collection circuit 14, AC collection circuit 13 and communication circuit 15 are connected with wiring terminal respectively.

[0030] In an embodiment of the utility model, power supply circuit provides power supply for communication circuit, AC collection circuit, DC collection circuit, external control circuit, microprocessor, buzzer and switch value collection circuit.

[0031] In an embodiment of the utility model, external control circuit and switch value collection circuit are connected with wiring terminal located at lower end, and DC collection circuit, AC collection circuit and communication circuit are connected with wiring terminal located at upper end.

[0032] In an embodiment of the utility model, communication circuit is connected with wiring terminal and microprocessor, and communication circuit contains internal communication and external communication, and communication circuit transmits data through RS485 transceiver, and communicates through modbus protocol in RS485 form.

[0033] In an embodiment of the utility model, power supply circuit converts external input power supply into 12V and 5V power supply required by each functional circuit on control main plate through filtering, rectification, voltage reduction and other processing. External control circuit controls external components through the dry contact of relay controlled by microprocessor. Buzzer 19 sends out sound alarm under the control of microprocessor 11 when system fails.

[0034] In an embodiment of the utility model, touch screen 2 is connected with control main plate 10 through flat cable, the flat cable is touch screen interface 18, and each component on control main plate 10 is connected through functional circuit; wiring terminal 21 is connected with terminal base on control main plate.

[0035] In an embodiment of the utility model, as shown in Figure 5As shown, the switch quantity acquisition circuit includes 4 groups of acquisition terminals P1, P2, P3, P4, each group of acquisition terminals is provided with 6 switches SW, capacitors C and resistors R, the switch quantity acquisition circuit is connected with the wiring terminal, and the switch quantity acquisition circuit is connected with the microcomputer processor through a single-end 8-channel multi-switch. The model of the single-end 8-channel multi-switch is CD4051. The module P5 of the switch quantity acquisition circuit is connected with the power supply circuit. The monitoring device can also be provided with an indicating lamp, and the switch quantity acquisition circuit can also be provided with a module P6, which is connected with the indicating lamp.

[0036] In an embodiment of the present application, the model of the control mainboard is PSM-JK12. The present application adds a switch quantity acquisition circuit to PSM-JK12 to realize 24-way acquisition.

[0037] The above only describes preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can be variously changed and modified. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A DC monitoring device with switch quantity detection, characterized in that, It includes a housing, a touch screen, a control motherboard, and external terminals. The control motherboard contains a microcomputer processor, AC acquisition circuit, DC acquisition circuit, external control circuit, communication circuit, power supply circuit, and buzzer. A switch quantity acquisition circuit is also installed on the control motherboard. The touch screen is installed on the front of the housing, and the control motherboard is located at the rear of the touch screen. The rear of the control motherboard is the back of the housing, and the back of the housing has wiring terminals.

2. The DC monitoring device with switch quantity detection according to claim 1, characterized in that, The AC acquisition circuit acquires AC voltage through an AC voltage transformer, processes and converts the acquired AC voltage data, and then sends it to the microcomputer processor. The DC acquisition circuit acquires DC voltage through a resistor voltage reduction circuit and DC current through an external shunt circuit. The acquired DC voltage and DC current data are processed and converted before being sent to the microcomputer processor. The switch quantity acquisition circuit acquires data through optocoupler isolation and sends it to the microcomputer processor via a channel switch.

3. The DC monitoring device with switch quantity detection according to claim 2, characterized in that, The external control circuit, switch quantity acquisition circuit, DC acquisition circuit, AC acquisition circuit and communication circuit are respectively connected to the terminal block.

4. The DC monitoring device with switch quantity detection according to claim 1, characterized in that, The power supply circuit provides power to the communication circuit, AC acquisition circuit, DC acquisition circuit, external control circuit, microprocessor, buzzer, and switch quantity acquisition circuit.

5. The DC monitoring device with switch quantity detection according to claim 3, characterized in that, The external control circuit and the switch quantity acquisition circuit are connected to the terminal block at the lower end, while the DC acquisition circuit, the AC acquisition circuit, and the communication circuit are connected to the terminal block at the upper end.

6. The DC monitoring device with switch quantity detection according to claim 1, characterized in that, The communication circuit is connected to the terminal block and the microcomputer processor. The communication circuit includes internal and external communication. The communication circuit relays data through an RS485 transceiver and communicates in RS485 format via the Modbus protocol.

7. The DC monitoring device with switch quantity detection according to claim 4, characterized in that, The power supply circuit converts the externally input power into 12V and 5V power required by the various functional circuits on the control motherboard.

8. The DC monitoring device with switch quantity detection according to claim 1, characterized in that, The touch screen is connected to the control motherboard via a ribbon cable, and the components on the control motherboard are connected via functional circuits; the terminal blocks are connected to the terminal bases on the control motherboard.

9. The DC monitoring device with switch quantity detection according to claim 1, characterized in that, The digital input acquisition circuit includes 4 sets of acquisition terminals. Each set of acquisition terminals is equipped with 6 switches, capacitors and resistors. The digital input acquisition circuit is connected to the wiring terminals and is connected to the microcomputer processor through a single-ended 8-channel multiplexer.

10. A DC monitoring device with switch quantity detection according to claim 1, characterized in that, The model of the control motherboard is PSM-JK12.

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