CN209656866U - Power monitoring device - Google Patents

Abstract

The utility model proposes a power supply monitoring device, which is applied to DME monitoring equipment in the civil aviation system, including power supply, power converter, acquisition circuit, ADC converter, multiplexing selector, FPGA programmable controller, embedded Single-chip microcomputer, serial port; the input end of the power converter is connected to the output end of the power supply, and the output end of the power converter is connected to the power interface of the FPGA programmable controller and the embedded single-chip microcomputer; the output end of the acquisition circuit is connected to the input of the ADC converter end, the output of the ADC converter is connected to the input of the multiplexing selector, and the output of the multiplexing selector is connected to the FPGA programmable controller, the FPGA programmable controller, the embedded microcontroller Connected in turn, the embedded microcontroller is connected to the control panel of the DME monitoring equipment through the serial port. The combination of an independent power supply and a high-speed power converter improves the conversion efficiency of the power supply.

Description

Power monitoring device

technical field

The utility model relates to the technical field of civil aviation DME monitoring, in particular to a power monitoring device.

Background technique

The original monitoring equipment cannot meet the needs of civil aviation projects in terms of function, real-time performance, and reliability. The original equipment only has the alarm function of power supply performance, and does not measure the power supply voltage, current, power amplifier voltage, battery status, etc. . Various parameters cannot be displayed in detail, and maintenance personnel cannot find out the cause of the alarm fault as soon as possible according to the alarm signal, and perform fault removal; on the other hand. Because the original battery monitoring equipment needs to monitor multiple analog signals and switching signals at the same time, the input terminal of the existing power monitoring equipment shares the power supply with the DME equipment, and the power conversion efficiency is too low, which seriously affects the AD conversion of the collected signals. The conversion rate of the power supply monitoring device is too low for the detection frequency of the DME detection equipment. When the monitoring data is collected by AD, the collection speed is slow and the bandwidth is occupied. Therefore, the collected data cannot be sent to the alarm device for display in time. Cause the machine to freeze or delay.

Utility model content

The purpose of this utility model is to at least solve one of said technical defects.

For this reason, an object of this utility model is to propose a kind of power monitoring device, utilize independent power supply and high-speed power converter to combine, have improved the conversion efficiency of power, utilize ADC converter and multiplexing selector and FPGA can Combined with a programmable controller, by controlling the chip selection state of the multiplexing selector, data acquisition can be performed on multiple signals at the same time, which improves the processing speed of the collected data. The collected data will be displayed on the control panel of the DME monitoring equipment, which will help the staff to find the abnormal data in time and judge the fault location in time according to the abnormal data.

In order to achieve the above purpose, an embodiment of the present utility model provides a power monitoring device, which is applied to DME monitoring equipment in civil aviation systems, including power supply, power converter, acquisition circuit, ADC converter, multiplexing selector , FPGA programmable controller, embedded single-chip microcomputer, serial port; The input end of described power converter is connected the output end of power supply, and the output end of described power converter is connected the power interface of FPGA programmable controller and embedded single-chip microcomputer; The input end of the acquisition circuit is provided with 7-way DC signal acquisition interfaces and 4-way AC signal acquisition interfaces, the output end of the acquisition circuit is connected to the input end of the ADC converter, and the output end of the ADC converter is connected to the multiplexer With the input end of the selector, the output end of the multiplexing selector is connected to the FPGA programmable controller, and the FPGA programmable controller and the embedded single-chip microcomputer are connected sequentially, and the embedded single-chip microcomputer is connected to the DME monitoring through a serial port. The control panel of the device.

Preferably, the 7 DC signal acquisition interfaces include a DME power supply voltage interface, a DME power supply current interface, a DME power amplifier voltage interface, an antenna feed interface on the No. 1 machine, an antenna feed interface on the No. 2 machine, a transponder feed interface and monitoring power feeder interface.

In any of the above schemes, it is preferred that the AC signal acquisition interface of No. 4 includes the beacon power interface of the No. 1 transmitter, the power power interface of the No. 1 transmitter, the beacon power interface of the No. 2 transmitter, the No. 2 transmitter Transmitter power supply interface.

In any of the solutions above, it is preferable that there are two ADC converters, and the two ADC converters respectively select a chip of model AD9220 to realize the acquisition of waveform signals.

In any of the solutions above, preferably, the power supply is UPS power supply.

In any of the above schemes, preferably, the power converter is a power converter with a model number of LT8705.

In any of the above schemes, it is preferred that the output terminals of each of the ADC converters are respectively connected to a multiplexing selector, and the multiplexing selector is a 4-way 2-input multiplexer with a model number of 74F157A device; the output end of the multiplexing selector is connected to the FPGA programmable controller.

A power monitoring device provided according to an embodiment of the present invention is compared with the existing civil aviation DME equipment power monitoring device. It has at least the following advantages: 1. Using the combination of an independent power supply and a high-speed power converter improves the conversion efficiency of the power supply; 2. Using the combination of an ADC converter and a multiplexing selector and an FPGA programmable controller, the The chip selection state of the multiplexing selector can realize data acquisition of multiple signals at the same time, which improves the processing speed of the collected data. The control panel display is helpful for the staff to find out the abnormal data in time, and judge the fault location in time according to the abnormal data.

Additional aspects and advantages of the present invention will be set forth in part in the description which follows, and part will be apparent from the description which follows, or can be learned by practice of the present invention.

Description of drawings

The above and/or additional aspects and advantages of the present utility model will become apparent and easy to understand from the description of the embodiments in conjunction with the following drawings, wherein:

FIG. 1 is a schematic diagram of a circuit connection structure of a power monitoring device provided by an embodiment of the present invention.

Fig. 2 is a circuit schematic diagram of a power converter in a power monitoring device provided by an embodiment of the utility model;

Fig. 3 is a schematic circuit diagram of an ADC converter in a power monitoring device provided by an embodiment of the present invention;

In the figure: 1. Power supply; 2. Power converter; 3. Acquisition circuit; 4. ADC converter; 5. Multiplexing selector; 6. FPGA programmable controller; 7. Embedded microcontroller;

Detailed ways

Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention, but should not be construed as limiting the present invention.

As shown in Figure 1, a power monitoring device according to an embodiment of the present invention is applied to DME monitoring equipment in a civil aviation system, including a power supply 1, a power converter 2, an acquisition circuit 3, an ADC converter 4, a multiplexing Selector 5, FPGA programmable controller 6, embedded single-chip microcomputer 7, serial port; The input end of described power converter 2 is connected the output end of power supply 1, and the output end of described power converter 2 is connected FPGA programmable controller 6 and the power supply interface of embedded single-chip microcomputer 7; The input end of described collection circuit 3 is provided with 7 roads DC signal collection interfaces and 4 roads AC signal collection interfaces, and the output end of described collection circuit 3 connects the input end of ADC converter 4 , the output end of the ADC converter 4 is connected to the input end of the multiplexing selector 5, and the output end of the multiplexing selector 5 is connected to the FPGA programmable controller 6, and the FPGA programmable controller 6 , The embedded single-chip microcomputer 7 is connected in sequence, and the embedded single-chip microcomputer 7 is connected to the control panel of the DME monitoring equipment through the serial port.

The 7-way DC signal acquisition interface includes DME power supply voltage interface, DME power supply current interface, DME power amplifier voltage interface, antenna feed interface on No. 1 machine, antenna feed interface on No. 2 machine, transponder feed interface and monitor feed interface. The 7 channels of DC signal acquisition interfaces are the 4-20MA DC signals of the DME collected, which are the voltage value, current value, power value of the DME, the feed voltage of the antenna of the No. 1 unit, the feed voltage of the antenna of the No. 2 unit, Transponder feed voltage and monitor feed voltage, etc., all 4-20MA DC signals can be directly collected into the ADC converter for digital conversion.

The AC signal collection interface of No. 4 includes the beacon power interface of the No. 1 transmitter, the power supply interface of the No. 1 transmitter, the beacon power interface of the No. 2 transmitter, and the power supply interface of the No. 2 transmitter. It should be noted that in the acquisition circuit, corresponding current transformers and voltage transformers are set corresponding to the 4-way AC acquisition interfaces. Since all the signals received from the 4-way AC signal acquisition interfaces are AC signals, the transformers are required to convert the AC After the signal is collected in proportion to a small signal, the ADC converter can be used for digital conversion.

As shown in FIG. 3 , there are two ADC converters 4 , and the two ADC converters 4 respectively select chips of model AD9220 to realize the acquisition of waveform signals. The high-speed analog-to-digital converter AD9220 of ADI Company is used to realize the acquisition of waveform signals. The maximum sampling rate of AD9220 can reach 10MHz, and an external crystal oscillator of 8MHz is used. FPGA internally realizes waveform storage through sampling. AD9220 has two kinds of input modes of DC coupling and AC coupling. The utility model adopts a DC coupling and an input mode of 0-5V. Use the internal 2.5V reference voltage. Because the vertical resolution of the system only needs 255 levels, the high 8 bits of AD9220 are used to connect the acquisition signal, and the low 8 bits are output to connect to the multiplexing selector. By setting two AD9220 chips, the simultaneous acquisition of 7 channels of DC signals and 4 channels of AC signals is realized.

As shown in FIG. 2 , the power supply 1 is UPS power supply. Use UPS power supply for independent power supply, avoid, intervene in DME equipment, occupy power, reduce power conversion rate, power converter 2 uses power converter 2 model LT8705. Using a single inductor and 4-switch synchronous rectification, the LT8705 operates over a wide input voltage range of 2.8V to 80V and produces an output of 1.3V to 80V. Its high input voltage helps simplify transient protection; a single LT8705 can deliver up to 250W of output power, making the device suitable for a range of loads by varying the switching power MOSFETs accordingly. By connecting multiple circuits in parallel, higher output power can be achieved.

In the above embodiment, preferably, the output ends of each ADC converter 4 are respectively connected to a multiplexing selector 5, and the multiplexing selector 5 selects a 4-way 2-input multiplexer whose model is 74F157A Multiplexer; the output of the multiplexer is connected to the FPGA programmable controller 6. 74F157A is a high-speed four-way 2-input multiplexer, which is selected from the data source under the control of the general data selection input (S) Select 4 bits of data at the same time. Carry out bus transmission, thereby solving the traditional data acquisition in which the input terminals are scanned sequentially according to the set frequency, the register addresses of the ADC converters are obtained one by one, and the cumbersome process of obtaining data is paid attention to.

In the description of this specification, descriptions with reference to the terms "one embodiment", "some embodiments", "example", "specific examples", or "some examples" mean that specific features described in connection with the embodiment or example , structures, materials or features are included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although the embodiments of the present invention have been shown and described above, it can be understood that the above-mentioned embodiments are exemplary and cannot be construed as limitations of the present invention. The above-mentioned embodiments can be changed, modified, replaced and modified within the scope of the present utility model under the principle and purpose. The scope of the invention is defined by the appended claims and their equivalents.

Claims (7)

1. a kind of electrical power monitoring device is applied to DME monitoring device in Civil Aviation System, which is characterized in that including power supply, electricity Source converter, Acquisition Circuit, ADC converter, multiplexing selector, FPGA programmable controller, embedded scm, string Mouthful；The output end of the input terminal connection power supply of the power adapter, the output end of the power adapter connect FPGA The power interface of programmable controller and embedded scm；The input terminal of the Acquisition Circuit is acquired equipped with 7 road direct current signals Interface and 4 road ac signal acquisition interfaces, the input terminal of the output end connection ADC converter of the Acquisition Circuit, the ADC turn The input terminal of the output end connection multiplexing selector of parallel operation, the output end connection FPGA of the multiplexing selector can be compiled Range controller, the FPGA programmable controller, embedded scm are sequentially connected, and the embedded scm is connected by serial ports It is connected to the control panel of DME monitoring device.

2. electrical power monitoring device according to claim 1, which is characterized in that direct current signal acquisition interface described in 7 tunnels includes DME supply voltage interface, DME source current interface, DME power amplifier voltage interface, No.1 aircraft antenna feeding interface, on No. two machines Antenna feeding interface, transponder feeding interface and monitor feeding interface.

3. electrical power monitoring device according to claim 1, which is characterized in that ac signal acquisition interface described in 4 tunnels includes 1 The beacon power interface of number transmitter, the power power-supply interface of No. 1 transmitter, No. 2 transmitters beacon power interface, No. 2 hairs Penetrate the power power-supply interface of machine.

4. electrical power monitoring device according to claim 1, which is characterized in that there are two the ADC converter is set, two institutes State the acquisition that ADC converter selects the chip of model AD9220 to realize waveform signal respectively.

5. electrical power monitoring device according to claim 1, which is characterized in that the power supply selects ups power.

6. electrical power monitoring device according to claim 1, which is characterized in that power adapter selects model LT8705's Power adapter.

7. electrical power monitoring device according to claim 4, which is characterized in that the output end of each ADC converter point Selector Lian Jie not be multiplexed, the multiplexing selector selects 4 tunnel, 2 input multiplexer of model 74F157A.