CN218546966U - Power supply real-time monitoring device - Google Patents
Power supply real-time monitoring device Download PDFInfo
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- CN218546966U CN218546966U CN202222588429.XU CN202222588429U CN218546966U CN 218546966 U CN218546966 U CN 218546966U CN 202222588429 U CN202222588429 U CN 202222588429U CN 218546966 U CN218546966 U CN 218546966U
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Abstract
The utility model discloses a power real time monitoring device, include: the sampling gating switching circuit comprises a controller, a sampling gating switching circuit and a sampling common channel circuit; the control end of the sampling gating switching circuit is connected with a GPIOx pin of the controller through a level conversion chip, and the input end of the sampling gating switching circuit is connected with the output ends of a plurality of divider resistor sampling channels; the output end is connected with the input end of the sampling common channel; the input ends of the plurality of divider resistance sampling channels are connected with a power supply; the sampling gating switching circuit is used for receiving the control of the controller to gate at least one divider resistor sampling channel to complete the acquisition of power signals; the input end of the sampling common channel circuit is connected with the output end of the sampling gating switching circuit, and the output end of the sampling common channel circuit is connected with the AD port of the controller or connected with the controller through the external expansion AD chip. According to the utility model discloses the power real time monitoring device who realizes carries out real time monitoring to a plurality of state volumes of power, and degree of automation is high, and detection efficiency is high, and real-time response is strong, can quantify a plurality of state volumes of power simultaneously.
Description
Technical Field
The utility model belongs to the technical field of power control, concretely relates to power real time monitoring device.
Background
The power supply is used as the power of the system, and the state of the power supply is related to whether the vehicle-mounted system can normally operate. At present, the power supply monitoring in the vehicle-mounted system is realized only by simple state indication, the real-time monitoring and quantification of the power supply state are lacked, the system fault elimination is lacked with powerful data support, and the difficulty of the system fault elimination is increased to a certain extent.
Disclosure of Invention
Therefore, to the above defect of prior art or improve at least a bit in the demand, the utility model provides a power real time monitoring device, monitoring device realize real-time monitoring power state based on nationwide productization components and parts, realize the real time monitoring management to power state through the quantization to the power state volume.
The utility model discloses a power real time monitoring device, a serial communication port, include: the sampling gating switching circuit comprises a controller, a sampling gating switching circuit and a sampling public channel circuit;
the control end of the sampling gating switching circuit is connected with a GPIOx pin of the controller through a level conversion chip, and the input end of the sampling gating switching circuit is connected with the output ends of a plurality of divider resistor sampling channels; the output end of the sampling gating switching circuit is connected with the input end of the sampling public channel; the input ends of the plurality of divider resistance sampling channels are connected with a power supply;
the sampling gating switching circuit is used for receiving the control of the controller to gate at least one divider resistor sampling channel to complete the acquisition of the power supply signal;
the input end of the sampling public channel circuit is connected with the output end of the sampling gating switching circuit, and the output end of the sampling public channel circuit is connected with the AD port of the controller or connected with the controller through an external expansion AD chip, so that voltage or current or temperature collection of the channel selected by the sampling gating switching circuit is realized.
Further, the sampling gating switching circuit comprises a switch relay which is connected with the control interface of the controller.
Furthermore, the sampling common channel circuit comprises a first operational amplifier, a first isolation amplifier, a second operational amplifier and a third operational amplifier which are connected in sequence.
Further, the model of the external expansion AD chip is AD1674AMD;
furthermore, the device also comprises an RS485 communication circuit, the input end of the RS485 communication circuit is connected with the controller, and the output end of the RS485 communication circuit is connected with the input end of the display and alarm circuit; and the output end of the display and alarm circuit is connected with an indicator lamp.
Furthermore, the device also comprises an Ethernet communication circuit, one end of which is connected with the controller, and the other end of which is connected with the Ethernet interface.
Further, the controller model is JDSPF28335.
Furthermore, the device also comprises a CAN communication circuit connected with the controller, wherein the CAN communication circuit comprises a CAN transceiver and an isolated power supply chip for supplying power to the transceiver.
Further, the model of the CAN transceiver chip is GLb1050C, and the model of the isolation power supply chip is DPT2-K5S5FM.
Further, the RS485 communication circuit comprises an RS485 transceiver and an isolation power supply chip for supplying power to the transceiver.
The beneficial technical effects of the utility model are embodied in that:
(1) According to the utility model, the real-time power monitoring device can monitor a plurality of state quantities of the power supply in real time under the condition of receiving the control signal, has high automation degree, high detection efficiency and strong real-time response, and can quantify the plurality of state quantities of the power supply at the same time;
(2) According to the utility model discloses a power real-time monitoring device, the first aspect can communicate with the ethernet, transmits to the host computer; in the second aspect, the result can be sent to the display and alarm circuit through the RS485 communication circuit; the problem that power state monitoring can not be quantized is solved, data support provided for power troubleshooting is achieved to a certain extent, and efficiency of power troubleshooting is improved.
Drawings
FIG. 1 is a schematic diagram of the overall frame assembly of an embodiment of the present invention;
fig. 2 is a schematic diagram of a CAN communication circuit according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a sampling strobe switching circuit according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a sampling common channel circuit according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the invention. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
The utility model discloses a power real time monitoring device, including controller, ethernet communication circuit, CAN communication circuit, RS485 communication circuit, sampling gating switching circuit, sampling common channel circuit, demonstration and warning circuit, wherein:
the control end of the sampling gating switching circuit is connected with a GPIOx pin of the controller through a level conversion chip, and the input end of the sampling gating switching circuit is connected with the output ends of the plurality of divider resistor sampling channels; the output end of the sampling gating switching circuit is connected with the input end of the sampling public channel;
the sampling gating switching circuit is used for gating a certain divider resistor sampling channel to realize the selection of the adopted channel, only one channel is gated at the same time to finish the acquisition of power supply voltage or current, and a plurality of different sampling channels realize sampling through time-sharing sampling channel selection;
the input end of the sampling common channel circuit is connected with the output end of the sampling gating switching circuit, and the output end of the sampling common channel circuit is connected with the AD port of the controller and used for collecting voltage, current or temperature of a channel of a power supply system corresponding to the sampling gating switching circuit;
one end of the Ethernet communication circuit is connected with a pin with a serial port function of the controller, and the other end of the Ethernet communication circuit is connected with an Ethernet interface;
one end of the CAN communication circuit is connected with a pin with a CAN transceiving function of the controller, and the output end of the CAN communication circuit is connected with the output end of another CAN communication circuit or a networking node in a CAN network;
the input end of the RS485 communication circuit is connected with a pin with a serial port function of the controller, and the output end of the RS485 communication circuit is connected with the input end of the display and alarm circuit; the input end of the display and alarm circuit is connected with the output end of the RS485 communication circuit, and the output end of the display and alarm circuit is connected with the indicator lamp.
As shown in figure 1, the utility model discloses power monitoring device includes controller, ethernet communication circuit, CAN communication circuit, RS485 communication circuit, sampling gate switching circuit, sampling common channel circuit, demonstration and warning circuit.
In a specific embodiment, the controller uses model JDSPF28335, the ethernet module uses serial port to ethernet module MC3Y028CE, the CAN communication chip uses model GLb1050C, the RS485 communication chip is model GLb2492C, and the like, and all core chips in the monitoring device are home devices, wherein:
the sampling gating switching circuit mainly comprises a relay, wherein the control end of the relay is connected with a GPIOx pin of the controller through a level conversion chip, the input end of the sampling gating switching circuit is connected with the output ends of the voltage division resistors, and the output end of the sampling gating switching circuit is connected with the input end of the sampling public channel. The sampling gating switching circuit gates different divider resistance sampling channels by controlling different relays, ensures that only one channel is gated at the same time, and realizes the sampling of information (output voltage, input voltage and the like) of different branches of a power supply system.
The sampling common channel circuit realizes acquisition and processing of acquisition quantity corresponding to the sampling gating switching circuit and acquisition and processing of acquisition quantity corresponding to the leakage detection circuit, and the combined circuit comprises two operational amplifiers and an isolation operational amplifier. The input end of the common sampling channel is connected with the output end of the sampling gating switching circuit, and the output end of the common sampling channel is connected with the AD port of the controller. The sampling public channel completely isolates the acquired signals from the controller through the isolation operational amplifier, so that the safety of the controller is fully protected in terms of hardware. And the AD circuit with the external expansion is preferentially selected, so that the data acquisition precision can be improved.
The Ethernet communication circuit realizes the information interaction between a single machine of the power supply system and an external system in a remote control state, the input end of the Ethernet communication circuit is connected with a pin with a serial port function of the controller, the output end of the Ethernet communication circuit is connected with an Ethernet interface, the Ethernet communication circuit realizes that serial port data is converted into Ethernet data through the Ethernet module to be sent out, and can also receive external Ethernet data, the serial port data is converted into serial port data to enter the controller through the serial port of the controller, so that the functions of converting the serial port into the Ethernet and converting the Ethernet into the serial port are realized, and the bidirectional information interaction is realized.
The CAN communication circuit realizes information interaction among all mutually independent components in the power supply system, the input end of the CAN communication circuit is connected with a pin with a CAN transceiving function of the controller, the output end of the CAN communication circuit is connected with the output end of another CAN communication circuit or a networking node in a CAN network, and the CAN communication circuit realizes networking of the CAN network through the CAN transceiver to realize one-to-one or one-to-many bidirectional information interaction. Meanwhile, a CAN transceiver with an isolation function and a power supply with the isolation function are required to be preferred so as to improve the reliability of data transmission.
The RS485 communication circuit realizes the information interaction between the single machine of the power supply system and the display screen and the alarm circuit in the control state, the input end of the RS485 communication circuit is connected with the pin with the serial port function of the controller, and the output end of the RS485 communication circuit is connected with the input end of the display and alarm circuit. The RS485 communication circuit realizes bidirectional information interaction between the controller and the display terminal through the 485 transceiver. It is required to select the 485 transceiver with isolation function and half-duplex working mode and the power supply with isolation function to improve the reliability of data transmission, and to ensure the consistency of the matching resistance in the circuit.
The input end of the display and alarm circuit is connected with the output end of the RS485 communication circuit, and the output end of the display and alarm circuit is connected with the indicator lamp. The display and alarm circuit displays data information such as voltage, current, temperature and the like of a system on the display screen in real time, can receive the setting of system parameters (voltage, current, temperature, IP address and the like) through the external keys, and lights the indicator lamp for alarming when the display screen displays specific abnormal information when abnormal conditions occur.
The utility model discloses an ethernet communication circuit, CAN communication circuit, RS485 communication circuit, sampling gating switching circuit, sampling common channel circuit, demonstration and alarm circuit adopt modularization, universalization design, sharing when multichannel voltage detection is time division.
Example (c):
the Ethernet communication circuit completes the information interaction function between the system and the outside in a system program control state, the model of a module used in the Ethernet communication circuit is MC3Y028CE, the module realizes the interconversion between a serial port and the Ethernet, and the module is strong in portability. The upper computer can carry out real-time interaction on any state information in the system through the Ethernet communication circuit.
The CAN communication circuit consists of a CAN transceiver and a CAN isolated power supply as shown in fig. 2. When the communication circuit mainly realizes the multi-path output in the system, all functional components are communicated with each other to form a CAN communication network, and information is collected into one component to be processed in a unified manner, so that the management of data is facilitated. The CAN transceiver with the isolation function CAN improve the reliability of system data transmission, and the GLb1050C with the Chinese Ke Ci province is selected for the purpose, and an isolation power supply is needed to supply power to the transceiver. The isolation power supply adopts a model DPT2-K5S5FM, and converts a 5V power supply into an isolated 5V power supply to provide electric energy for the transceiver. In the networking process of the CAN communication circuit, the matching resistance is very important, and improper selection CAN cause errors in the data transmission process. In a normal case, the value of the matching resistor (R45 in the figure) in the circuit is generally selected to be 120 Ω.
And the RS485 communication circuit consists of an RS485 transceiver and an isolation power supply. The communication circuit mainly realizes information interaction between the state information of the system and the display and alarm circuit module in the local control state, and is used for local display or inquiry or operation functions of the state information of the system. The RS485 has better anti-interference capability than 422 and 232 communication, and meanwhile, the half-duplex mode is adopted to reduce the fault-tolerant rate and improve the reliability of data, the RS485 transceiver is of a model GLb2492C, and the isolation power supply is of a model DPT2-K5S5FM.
The sampling gating switching circuit is composed of relays, a controller sends out a control signal, the control signal is subjected to level conversion, and then the on and off of the relays are controlled to realize the on and off of a certain path of voltage after voltage division, as shown in fig. 3, when + M2+ and + M2-are high at the same time, the relays K7F and K7H are in a closed state, and the sampling gating switching circuit is switched on. In order to ensure the safety and reliability of the circuit, the control signals of the relays are AND-processed in the controller program or the logic AND circuit design is utilized, namely, only one relay is in a connection state or all relays are in disconnection and connection at any one time.
A sampling resistor voltage division channel is formed by resistors R95 and R96, as shown in figure 3, input voltage ZK is converted into M2, different detection voltages correspond to different voltage division ratios, wherein the values of R95 and R96 are determined by the sampling range of an AD chip, and in order to ensure the linearity of the AD chip and improve the sampling precision, the value of a precision resistor network after voltage division is generally ensured to be near the middle value of the sampling range of the AD chip, and a precision resistor must be selected.
The common sampling channel is composed of operational amplifiers N2, N3A and N3B and an isolation amplifier N4, the isolation amplifier N4 ensures that the input voltage and the voltage between the controllers are completely isolated, and the specific circuit design is shown in FIG. 4.
The AD port of the controller can use the AD interface of the DSP itself, and can also extend the AD chip. In the design, a successive approximation type analog-to-digital conversion chip AD1674AMD with a 12-bit to-be-parallel microcomputer interface is selected as an externally-expanded AD chip, the conversion time is only 10 mu s, four input ranges can be selected, in order to ensure the universality of the circuit, the input range of 0-20V is adopted in the design, and the output adopts a parallel mode.
The controller can be replaced by DSP (Digital Signal Processor), FPGA (Field Programmable Gate Array), ARM (Advanced RISCMacachines), soC (System on Chip). The controller JDSPF28335 selected in this embodiment mainly completes control of the relay, communication with the display screen through RS485, communication with the upper computer through ethernet, and processing of the sampling value. The state information of the system is sent to a display and alarm circuit through a local control communication circuit for display or sound and light alarm, or sent to an upper computer through a remote control communication circuit for display.
The display and alarm circuit is used for displaying the power state quantity on the display screen at any time so as to quantitatively master each state quantity in the power system.
The description of the present invention is merely an illustration of the present invention, and those skilled in the art can modify or supplement the described embodiments or replace them with similar ones, without departing from the scope of the present invention or exceeding the scope defined by the claims.
Claims (10)
1. A real-time power monitoring apparatus, comprising: the sampling gating switching circuit comprises a controller, a sampling gating switching circuit and a sampling common channel circuit;
the control end of the sampling gating switching circuit is connected with a GPIOx pin of the controller through a level conversion chip, and the input end of the sampling gating switching circuit is connected with the output ends of a plurality of divider resistor sampling channels; the output end of the sampling gating switching circuit is connected with the input end of the sampling public channel; the input ends of the plurality of divider resistance sampling channels are connected with a power supply;
the sampling gating switching circuit is used for receiving the control of the controller to gate at least one divider resistor sampling channel to complete the acquisition of a power supply signal;
the input end of the sampling public channel circuit is connected with the output end of the sampling gating switching circuit, and the output end of the sampling public channel circuit is connected with the AD port of the controller or connected with the controller through an externally-expanded AD chip, so that voltage or current or temperature collection of the channel selected by the sampling gating switching circuit is realized.
2. The real-time power supply monitoring device according to claim 1, wherein the sampling gating switching circuit comprises a switching relay, and the switching relay is connected with a control interface of the controller.
3. The real-time power supply monitoring device according to claim 1 or 2, wherein the sampling common channel circuit comprises a first operational amplifier, a first isolation amplifier, a second operational amplifier and a third operational amplifier which are connected in sequence.
4. The device as claimed in claim 3, wherein the external AD chip model is AD1674AMD.
5. The real-time power monitoring device according to claim 4, wherein the device further comprises an RS485 communication circuit, the input end of the RS485 communication circuit is connected with the controller, and the output end of the RS485 communication circuit is connected with the input end of the display and alarm circuit; and the output end of the display and alarm circuit is connected with an indicator lamp.
6. The real-time power monitoring device of claim 4, further comprising an Ethernet communication circuit, one end of which is connected to the controller and the other end of which is connected to an Ethernet interface.
7. The device for real-time monitoring power supply according to claim 6, wherein the controller is JDSPF28335.
8. The device for real-time monitoring of power supply of claim 7, further comprising a CAN communication circuit connected to said controller, said CAN communication circuit comprising a CAN transceiver and an isolated power chip for powering said transceiver.
9. The device for real-time monitoring of power supply of claim 8, wherein the CAN transceiver chip is of the type GLb1050C and the isolated power supply chip is of the type DPT2-K5S5FM.
10. The device for real-time monitoring of a power supply of claim 5, wherein the RS485 communication circuit comprises an RS485 transceiver and an isolated power supply chip for supplying power to the transceiver.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222588429.XU CN218546966U (en) | 2022-09-27 | 2022-09-27 | Power supply real-time monitoring device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222588429.XU CN218546966U (en) | 2022-09-27 | 2022-09-27 | Power supply real-time monitoring device |
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| Publication Number | Publication Date |
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| CN218546966U true CN218546966U (en) | 2023-02-28 |
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| CN202222588429.XU Active CN218546966U (en) | 2022-09-27 | 2022-09-27 | Power supply real-time monitoring device |
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