CN210604897U

CN210604897U - Test system for on-load radio frequency relay

Info

Publication number: CN210604897U
Application number: CN201921431696.8U
Authority: CN
Inventors: 黄卫豪; 姚品业; 陈炼铭
Original assignee: Shenzhen Xike Technology Co ltd
Current assignee: Shenzhen Xike Technology Co ltd
Priority date: 2019-08-30
Filing date: 2019-08-30
Publication date: 2020-05-22
Anticipated expiration: 2029-08-30

Abstract

The utility model provides a test system for area carries radio frequency relay, including power module, the radio frequency port, voltage acquisition analog/digital conversion module, the count key, a single-chip microcomputer, a display screen, first PWM drive module, second PWM drive module and load resistance, voltage acquisition analog/digital conversion module gathers analog voltage value and converts digital voltage value into through the radio frequency port, the singlechip is handled this digital voltage value and is shown signal display and through the display screen display, the count key sends the count signal to the singlechip, and the radio frequency relay drive end work that awaits measuring through first PWM drive module drive, the singlechip passes through second PWM drive module drive load resistance, load resistance and the radio frequency relay radio frequency end electricity that awaits measuring are connected. The utility model discloses a test system can monitor whether the radio frequency relay contact of taking the load is closed completely, can also switch the test to the radio frequency relay of different models, realizes the multichannel test, has improved the efficiency of test, has reduced the test cost.

Description

Test system for on-load radio frequency relay

Technical Field

The utility model relates to a coaxial relay test technical field of radio frequency, in particular to a test system for carrying radio frequency relay.

Background

The radio frequency coaxial relay is also called as a microwave coaxial relay, which is a radio frequency relay taking a coaxial high-frequency joint as a radio frequency leading-out end, because the microwave signal transmitted by the coaxial high-frequency joint has the characteristics of high frequency, wide frequency band and large information quantity, the radio frequency coaxial relay is widely applied to systems such as multipath communication, relay communication, scattering communication, mobile communication, satellite communication, radar system, navigation system, electronic countermeasure, measurement and detection and the like in the fields of aerospace, aviation, navigation, communication, military, science and technology and the like, therefore, the performance test system for the radio frequency coaxial relay is very important, at present, the existing radio frequency coaxial relay test system has high equipment cost, large volume and few functions, the existing test equipment can not carry out load test performance on the radio frequency coaxial relay and can not switch the test aiming at the radio frequency relays of different models at will not, the efficiency of the test is greatly reduced, and the cost of the test is improved.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides a switch the test to the radio frequency relay of different models, realize taking the load test, the multichannel test, efficient, with low costs is used for taking the test system who carries the radio frequency relay.

The utility model discloses a realize through following technical scheme:

the utility model discloses a test system for radio frequency relay with load, including power module, radio frequency port, voltage acquisition analog/digital conversion module, count key, singlechip, display screen, first PWM drive module, second PWM drive module and load resistance, power module supplies power for each power consumption part, voltage acquisition analog/digital conversion module gathers the analog voltage value of radio frequency relay radio frequency end to be measured through the radio frequency port and converts into digital voltage value, the singlechip will receive the digital voltage value and process into display signal and show through the display screen, the count key sends the count signal to the singlechip, first PWM drive module receives the count signal and drives the radio frequency relay drive end to be measured work, the singlechip drives the load resistance through the second PWM drive module, and the load resistor is electrically connected with the radio frequency end of the radio frequency relay to be tested.

Furthermore, the test system further comprises a start-stop key, a monitoring switch, a frequency change-over switch and a relay change-over switch, wherein the start-stop key, the monitoring switch, the frequency change-over switch and the relay change-over switch are all electrically connected with the input end of the single chip microcomputer.

Further, the test system further comprises an LED indicator light, and the LED indicator light is connected with the single chip microcomputer and is used for displaying the on-off state of the radio frequency port.

Further, the singlechip is an STC8A8K64S4A12 singlechip.

Further, the display screen is an LCD (liquid crystal display) screen.

Furthermore, the first PWM driving module and the second PWM driving module are both UD2981 Darlington tube array driving chips.

Implement the utility model discloses a test system for carrying radio frequency relay has following technical characteristic and profitable technological effect:

the utility model discloses a test system for area carries radio frequency relay not only can accurately monitor and take the load radio frequency relay contact closed completely, can also switch the test to the radio frequency relay of different models, has realized the multichannel test, has improved the efficiency of test, has reduced the test cost.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.

Fig. 1 is a functional block diagram of a test system for an on-load rf relay according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a test system for an on-load rf relay according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 1 and 2, a preferred embodiment of the present invention is a testing system for an on-load rf relay, including a power module 1, an rf port 2, a voltage acquisition a/d conversion module 3, a counting key 4, a single chip 5, a display screen 6, a first PWM driving module 7, a second PWM driving module 8 and a load resistor 9, where the power module 1 supplies power to each power consumption part, the voltage acquisition a/d conversion module 3 acquires an analog voltage value at an rf terminal of an rf relay 10 to be tested through the rf port 2 and converts the analog voltage value into a digital voltage value, the single chip 5 processes the received digital voltage value into a display signal and displays the display signal through the display screen 6, the counting key 4 sends out a counting signal to the single chip 5, the first PWM driving module 7 receives the counting signal and drives a driving end of the rf relay 10 to be tested to operate, the single chip 5 drives the load resistor 9 through the second PWM driving module 8, the load resistor 9 is electrically connected with the radio frequency end of the radio frequency relay 10 to be tested.

The test system further comprises a start-stop key 11, a monitoring switch 12, a frequency change-over switch 13 and a relay change-over switch 14, wherein the start-stop key 11, the monitoring switch 12, the frequency change-over switch 13 and the relay change-over switch 14 are all electrically connected with the input end of the single chip microcomputer 5.

The test system further comprises an LED indicator light 15, and the LED indicator light 15 is connected with the single chip microcomputer 5 and used for displaying the on-off state of the radio frequency port 2.

The singlechip 5 is an STC8A8K64S4A12 singlechip.

The display screen 6 is an LCD liquid crystal display screen.

The first PWM driving module 7 and the second PWM driving module 8 are both UD2981 Darlington tube array driving chips.

Further explanation is as follows:

the embodiment of the utility model provides a test system for carrying radio frequency relay adopts 8 position singlechip STC8A8K64S4A12 as this test circuit board' S master control MCU (singlechip).

① cold switching is realized by switching a load into a radio frequency port after a contact of a radio frequency relay is closed stably, switching of the relay is controlled by PWM1 and IC1, the load is switched into the radio frequency port only after the contact of the relay is closed by PWM2 and IC2, IRFP064 is a high-power N-channel MOS (metal oxide semiconductor) transistor, and the gate voltage can be completely switched on when 10V exists, so that the MOS transistor is controlled to be switched on and off by IC2, a singlechip cannot directly control the MOS transistor, and the output voltage of an I/O port cannot reach 10V.

② radio frequency port voltage sampling of the radio frequency relay (whether the radio frequency port is normally closed or opened is judged by collecting the voltage of a 1K sampling resistor connected to the radio frequency port), analog-to-digital conversion is carried out by utilizing a resource 12-bit ADC arranged in the single chip microcomputer to obtain the voltage of the sampling resistor, and then filtering is carried out on the program to reduce accidental sampling errors.

③ function keys are respectively provided with a start-stop key, a counting key, a monitoring switch, a frequency switch (switching between fast-500 ms and slow-100 ms) and a relay switch, and the total number of the function keys is 5.

The ④ display screen adopts the LCD1602 display screen to show count, monitor switch, relay switching parameter of different models.

⑤ the first PWM driving module and the second PWM driving module are UD2981 Darlington tube array driving chips, each channel of the first PWM driving module and the second PWM driving module can output 500mA at the maximum, and a freewheeling diode is arranged in each channel for eliminating the counter potential of a coil, so that the single chip microcomputer is suitable for driving the radio frequency relay, the driving capability of the single chip microcomputer is limited, so that the PWM driving module can be used for controlling the radio frequency relay to control large current with small current, and the UDN2981 is the bridge.

⑥ the LED indicator light is controlled by judging the voltage of the radio frequency port to display the on-off state of the radio frequency port.

the utility model discloses a test system for area carries radio frequency relay not only can accurately monitor whether the radio frequency relay contact is closed completely, can also switch the test to the radio frequency relay of different models, has realized the multichannel test, has improved the efficiency of test, has reduced the test cost.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A test system for a loaded radio frequency relay is characterized by comprising a power supply module, a radio frequency port, a voltage acquisition analog-digital conversion module, a counting key, a single chip microcomputer, a display screen, a first PWM driving module, a second PWM driving module and a load resistor, wherein the power supply module supplies power for all power utilization parts, the voltage acquisition analog-digital conversion module acquires an analog voltage value of the radio frequency end of the radio frequency relay to be tested through the radio frequency port and converts the analog voltage value into a digital voltage value, the single chip microcomputer processes the digital voltage value into a display signal and displays the display signal through the display screen, the counting key sends a counting signal to the single chip microcomputer, the first PWM driving module receives the counting signal and drives the driving end of the radio frequency relay to be tested to work, and the single chip microcomputer drives the load resistor through the second PWM driving module, and the load resistor is electrically connected with the radio frequency end of the radio frequency relay to be tested.

2. The test system of claim 1, further comprising a start-stop key, a monitor switch, a frequency switch and a relay switch, wherein the start-stop key, the monitor switch, the frequency switch and the relay switch are electrically connected to the input end of the single chip microcomputer.

3. The test system of claim 1, further comprising an LED indicator light connected to the single chip microcomputer and configured to display the on-off state of the radio frequency port.

4. The test system of claim 1, wherein the single chip microcomputer is an STC8A8K64S4a12 single chip microcomputer.

5. The test system of claim 1, wherein the display is an LCD screen.

6. The test system of claim 1, wherein the first and second PWM driving modules are both UD2981 Darlington tube array driving chips.