Portable LEU waveform tester

Abstract

The utility model discloses a portable LEU waveform tester, which relates to the technical field of LEU application, and comprises an LEU device, a simulation load, a signal acquisition module and a data processing module, the LEU device is connected with the simulation load, the simulation load is connected with the signal acquisition module, and the signal acquisition module is connected with the data processing module. The simulation load and the signal acquisition module are both connected with the data processing module through a USB, the structure is simple, the weight is light, carrying is convenient, a first field test can be achieved, an LEU test laboratory is moved to the field, parameter indexes of LEU equipment are directly tested on the application field, and the test efficiency is improved. Parameter information such as frequency and amplitude of a C interface signal of the LEU equipment is quantitatively analyzed, meanwhile, change conditions of an original waveform emitted by the LEU equipment and a waveform in practical application are detected in real time, testing is simple and convenient, and analysis and comparison of the LEU waveform are facilitated.

Description

TECHNICAL FIELD

[0001] The utility model relates to LEU application technical field especially, it is a portable LEU waveform tester. BACKGROUND

[0002] LEU equipment is divided into indoor application and outdoor application two kinds, most install in the room, LEU equipment passes through serial communication interface periodically from the data message of department equipment such as ground control center in the place, real -time these data message conversion meets LEU equipment C interface electrical characteristics signal, through the cable connected active transponder, continuously to active transponder transmission, generally speaking, the main work module and component of LEU equipment appear fault, will directly lead to the change of LEU equipment C interface signal parameter,

[0003] In prior art, the test mode of LEU equipment in field application generally includes reading code element information and testing signal level, for example reads the message information of LEU output port or reads the message information of active transponder equipment,

[0004] But the field situation is more complex, and the active transponder and LEU equipment tail cable have influence on C interface signal, the existing test means is difficult to cover the influence of these factors on the equipment, and this test mode directly carries out hardware demodulation to the C interface signal of LEU equipment, and does not reflect the change of original signal and waveform sent by LEU equipment, and this analysis mode has significant defects and deficiencies.

[0005] Therefore, the portable LEU waveform tester is provided to solve the above problems. UTILITY MODEL CONTENTS

[0006] The utility model discloses a portable LEU waveform tester, which directly tests the parameter index of LEU equipment in the application field, quantitatively analyzes the frequency and amplitude of the C interface signal of LEU equipment, and simultaneously detects the original waveform transmitted by the LEU equipment and the change of the waveform in actual application.

[0007] To achieve the above object, the utility model provides a portable LEU waveform tester, which comprises an LEU equipment, an analog load, a signal acquisition module and a data processing module.

[0008] Preferably, the LEU equipment comprises a serial interface, a data processing board and a tail cable, and the LEU equipment is connected with the analog load through the tail cable.

[0009] Preferably, the signal acquisition module adopts an external small-size high-speed acquisition card, and a sampling frequency of the external small-size high-speed acquisition card is set as 100MHz.

[0010] Preferably, the external small-size high-speed acquisition card is provided with a signal conditioner, a signal splitter and a digital-to-analog converter.

[0011] Preferably, the data processing module adopts a notebook computer, and the notebook computer is set as a 5V voltage working mode.

[0012] Preferably, the notebook computer is provided with a display interface, and the notebook computer is built-in with LEU analysis software.

[0013] Preferably, when the frequency is 200-600KHz, the impedance value of the analog load is 120Ω±1%, and when the frequency is 8.82KHz±0.1KHz, the impedance value of the analog load is 120Ω±1%.

[0014] Therefore, the portable LEU waveform tester has the following beneficial effects:

[0015] (1) By connecting a standard load, original information of a C interface of the LEU equipment can be directly measured, and the real state of the LEU equipment under the standard load condition can be reflected more;

[0016] (2) The structure is simple, the weight is light, and the portable LEU waveform tester is convenient to carry and can realize first-site testing, which is equivalent to moving the LEU testing laboratory to the site, and the testing is simple and convenient, and the original signal tested can be reserved, so that the LEU waveform can be analyzed and compared;

[0017] (3) The parameter index of the LEU equipment can be directly tested on the application site, the analog load is a site transponder, the frequency and amplitude of the C interface signal of the LEU equipment and other parameter information can be quantitatively analyzed, the original waveform and the change of the waveform in actual application of the LEU equipment can be detected in real time, and the real state of the C interface under the condition of connecting the site transponder equipment of the LEU can be reflected.

[0018] The technical scheme of the portable LEU waveform tester will be further described in detail below with reference to the drawings and embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 Fig. 1 is a structural view of the portable LEU waveform tester;

[0020] Figure 2 Fig. 2 is a module connection view of the portable LEU waveform tester.

[0021] Wherein: 1, LEU device; 101, serial interface; 102, data processing board; 103, tail cable; 2, analog load; 3, external small size high-speed acquisition card; 301, signal conditioner; 302, signal splitter; 303, digital-to-analog converter; 4, notebook computer; 401, display interface. DETAILED DESCRIPTION

[0022] The technical scheme of the utility model is further explained below by means of the drawings and examples.

[0023] Unless otherwise defined, technical terms or scientific terms used in the utility model should be understood as the usual meaning understood by a person with ordinary skills in the field to which the utility model belongs. In the utility model, the words "first", "second" and similar words do not represent any order, quantity or importance, but are only used to distinguish different components. The words "include" or "contain" and similar words mean that the elements or objects before the words cover the elements or objects listed after the words and their equivalents, and do not exclude other elements or objects. The words "connect" or "connected" and similar words are not limited to physical or mechanical connection, but can include electrical connection, whether direct or indirect. The words "up", "down", "left", "right" and the like are only used to represent relative positional relationship, and when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0024] EMBODIMENT

[0025] As shown in Figure 1 and Figure 2 The utility model provides a portable LEU waveform tester, including LEU device 1, analog load 2, signal acquisition module and data processing module, LEU device 1 is connected with analog load 2, analog load 2 is connected with signal acquisition module, and analog load 2 and signal acquisition module are connected with data processing module through USB.

[0026] LEU device 1 includes serial interface 101, data processing board 102 and tail cable 103, and LEU device 1 is connected with analog load 2 through tail cable 103.

[0027] Analog load 2 can simulate field active transponder equipment, and its characteristics are that under the condition that the frequency is 200-600KHz, the impedance value is 120Ω±1%, and under the condition that the frequency is 8.82KHz±0.1KHz, the impedance value is 120Ω±1%.

[0028] The signal acquisition module adopts an external small-size high-speed acquisition card 3, the sampling frequency of the external small-size high-speed acquisition card 3 is set to 100 MHz, which not only meets the sampling requirement, but also reduces the data volume and data usage space, and improves the operation speed, the external small-size high-speed acquisition card 3 is in a low-power mode when no work instruction is received, the power consumption is small, and no additional power supply is required, so the portable LEU waveform tester has the characteristics of simple structure, light weight and easy to carry.

[0029] The external small-size high-speed acquisition card 3 is provided with a signal conditioner 301, a signal splitter 302 and a digital-to-analog converter 303, and the C interface signal of the LEU device 1 is converted into a digital signal through the digital-to-analog converter 303.

[0030] The data processing module adopts a notebook computer 4, the notebook computer 4 is set to a 5V voltage working mode, and provides 5V working voltage and data communication for other modules except the analog load through the USB connection mode, and the communication and power supply are integrated;

[0031] The notebook computer 4 is provided with a display interface 401, the display interface 401 displays the waveform profile and details of the signal, the notebook computer 4 is provided with LEU analysis software, analyzes the C interface signal of the LEU device 1, calculates the amplitude and rate parameter information, filters out the C6 signal by using digital filtering, calculates the amplitude and rate of the C1 signal, filters out the C1 signal by using digital filtering, calculates the amplitude and rate of the C6 signal, decodes according to the requirements of TB / T3485-2017 "Transponder Transmission System Technical Conditions" Appendix A.5, and realizes the output and analysis of the waveform.

[0032] Therefore, the portable LEU waveform tester has the advantages of simple structure, light weight, easy to carry, can realize the first field test, is equivalent to moving the LEU test laboratory to the field, is simple and convenient to test, can reserve the original signal tested, and is convenient for LEU waveform analysis and comparison.

[0033] Finally, it should be noted that: the above examples are only used to illustrate the technical scheme of the utility model and not to limit it, although the utility model has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical scheme of the utility model can still be modified or replaced, and these modifications or replacements cannot make the modified technical scheme deviate from the spirit and scope of the utility model technical scheme.

Claims

1. A portable LEU waveform tester, characterized in that: It includes an LEU device, a simulated load, a signal acquisition module and a data processing module. The LEU device is connected to the simulated load, the simulated load is connected to the signal acquisition module, and both the simulated load and the signal acquisition module are connected to the data processing module via USB.

2. A portable LEU waveform tester according to claim 1, characterized in that: The LEU device includes a serial interface, a data processing board and a tail cable, and the LEU device is connected to the simulated load through the tail cable.

3. A portable LEU waveform tester according to claim 1, characterized in that: The signal acquisition module adopts an external small-size high-speed acquisition card, and the sampling frequency of the external small-size high-speed acquisition card is set to 100 MHz.

4. A portable LEU waveform tester according to claim 3, characterized in that: The external small-size high-speed acquisition card is provided with a signal conditioner, a signal splitter and a digital-to-analog converter.

5. A portable LEU waveform tester according to claim 1, characterized in that: The data processing module adopts a laptop computer, and the laptop computer is set to a 5V voltage working mode.

6. A portable LEU waveform tester according to claim 5, characterized in that: The laptop computer is provided with a display interface, and the laptop computer has built-in LEU analysis software.

7. A portable LEU waveform tester according to claim 1, characterized in that: When the frequency is 200-600KHz, the impedance value of the simulated load is 120Ω±1%, and when the frequency is 8.82KHz±0.1KHz, the impedance value of the simulated load is 120Ω±1%.

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