CN218180999U - Switch matrix for testing high-power meter wave product - Google Patents
Switch matrix for testing high-power meter wave product Download PDFInfo
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- CN218180999U CN218180999U CN202222482276.0U CN202222482276U CN218180999U CN 218180999 U CN218180999 U CN 218180999U CN 202222482276 U CN202222482276 U CN 202222482276U CN 218180999 U CN218180999 U CN 218180999U
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Abstract
The utility model relates to the technical field of electrical switches, in particular to a switch matrix for testing a high-power meter-wave product, which comprises a high-power single-pole multi-throw switch, a drive circuit and a test system control unit interface; each port of a tested product is connected to a tested piece signal interface of the switch matrix, each path of signal input into the switch matrix from the tested product selects one path of signal to be connected to a subsequent circuit by the first-stage high-power single-pole multi-throw switch, the selected signal is input to the sum end of the second-stage high-power single-pole multi-throw switch through the sum end of the first-stage high-power single-pole multi-throw switch, and the selected signal is sent to a test instrument by the second-stage single-pole multi-throw high-power switch through the instrument port of the switch matrix. The utility model discloses an use high-power relay switch and optical coupler chip to keep apart the high-power signal of being tested twice, reduce high-power signal to control, drive circuit's influence.
Description
Technical Field
The utility model relates to an electrical switch technical field specifically is a switch matrix for high-power meter ripples product testing.
Background
During the development and production process in the field of telecommunications, it is often necessary to perform performance tests on products. When performing performance testing on a product having multiple ports and outputting a high-power signal, multiple attenuators and a large number of cables and other controllers and test instruments are generally required to build a test system. Usually, the interface connected with the test instrument needs to be frequently replaced in the test process of the product, and the control of the working state of the product is also involved in the operation process; because the performance test contents are usually more, the operator may have faulty operations such as cable connection error, product control error and the like in the long-time working process, so that the instrument or the high-power attenuator or the product is damaged, the production cost of the product is increased, and the production work plan of the product is delayed.
In the prior art, a switch matrix for product test is generally built by using semiconductor switch units, and the disadvantage of the switch unit in this form is that: the switch is not suitable for a high-power environment with meter wave and short wave bands, and under the condition of relatively low signal frequency, a diode of a semiconductor switch inevitably has a detection working effect, so that reverse voltage required by switch turn-off is increased, and a driving circuit is difficult to realize; after a signal passes through a switch, due to the fact that a diode is saturated, the switch diode works in a nonlinear region, output signal loss is too high, harmonic waves are increased, and the switch diode cannot work normally.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a switch matrix for high-power meter ripples product test to solve the problem that proposes among the above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme: a switch matrix for testing a high-power meter-wave product comprises a high-power single-pole multi-throw switch, a drive circuit and a test system control unit interface;
each port of a tested product is connected with a tested piece signal interface of the switch matrix, each path of signal input into the switch matrix from the tested product selects one path of signal to be connected with a subsequent circuit by the first-stage high-power single-pole multi-throw switch, the selected signal is input into the sum end of the second-stage high-power single-pole multi-throw switch through the sum end of the first-stage high-power single-pole multi-throw switch, and the selected signal is sent to a test instrument through the instrument end interface of the switch matrix and the instrument port fed in by the second-stage single-pole multi-throw high-power switch;
the signal path selection state of the high-power single-pole multi-throw switch is controlled by the drive circuit, when the high-power single-pole multi-throw switch is tested, a computer end of a test system sends a communication command to a product and test tool cooperative control unit to judge control signals to be sent to the switch matrix and a tested product, the control signals to be sent to the switch matrix are sent to the drive circuit by the unit through a test system control unit interface, and the drive circuit converts the control signals into drive signals required by the high-power single-pole multi-throw switch and sends the drive signals to the high-power switch to complete the selection of the signal path.
Preferably, the high-power switch group is composed of a plurality of high-power relay switches, at least one high-power relay switch is included to form the second-stage high-power single-pole multi-throw switch or the instrument selection switch, and at least two high-power relay switches are included to form the first-stage high-power single-pole multi-throw switch or the product interface selection switch;
if a product with more ports needs to be subjected to performance test, the number of the high-power switches needs to be increased according to the number of the ports of the product so as to form a single-pole multi-throw switch with more selected number; the selected high-power switch is an NR-SD relay switch, the relay switch can ensure that the high-power single-pole multi-throw switch reaches the state switching time of millisecond magnitude, bears 1000W pulse power signals or 50W continuous wave power signals under the signal frequency of meter wave and short wave bands, can transmit the power signals with lower insertion loss, and can ensure that a driving circuit can meet the requirement that the high-power single-pole multi-throw switch works in the online state by using smaller voltage signals.
Preferably, the driving circuit comprises a decoder, an optical coupler chip and a triode, after receiving a control command, the driving circuit sends a control command signal to the decoder to be processed into a single-path high-level signal, and sends the high-level signal to the B pole of the triode in the corresponding driving path, and the C pole of the triode is connected with the cathode of the diode of the optical coupler chip;
when the signal from the decoder is at a high level, the photodiode in the optocoupler chip is turned on under the action of the triode, and a driving signal is sent to the high-power switch through the phototriode in the optocoupler chip to complete the state conversion of the high-power switch, wherein the optocoupler chip is a TLP93 chip.
Preferably, the test system control unit interface mainly comprises a plurality of low-frequency connectors;
in order to reduce wiring and equipment used in the process of testing a high-power meter wave product, a physical structure is designed on the switch matrix, equipment used for controlling the product to work and the switch matrix to work can be mounted on the switch matrix, the equipment can supply power to the switch matrix, and an interface which transmits control signals and can provide additional switching through the switch matrix is arranged. The equipment is connected to the switch matrix, so that the equipment can be set to control the action of the switch matrix according to the switching of the working state of a product, the product and a test instrument can be protected, and the possibility of misoperation due to independent clamp accessories during product testing can be reduced.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model discloses an use high-power relay switch to build the switch matrix, can be with the high-power meter ripples of being tested the product, short wave signal output to the testing instrument in the middle of with lower loss linearity, it can bear hundreds of watts's pulse signal or tens of watts's continuous wave signal, is less than 0.5dB to high-power signal's loss, and the state switching time of switch can reach hundreds of microseconds's order of magnitude, and the biggest is no longer than 1 millisecond.
The utility model discloses an use high-power relay switch and optical coupler chip twice to keeping apart the high-power signal of being tested, reduce high-power signal to control, drive circuit's influence, make switch operating condition stable, the controlgear of protection in the test procedure is not disturbed.
The utility model discloses can reduce switching speed according to the actual demand slightly and require to avoid semiconductor switch operating condition control's under the high-power environment of low frequency difficult point, simplify the design degree of difficulty of circuit, reduce drive circuit's voltage and can promote the security of switch matrix in production and use.
The utility model provides a frequency signal and control signal's transfer platform when high-power meter ripples product test can effectively reduce the number of times of manual wiring in the test work process, high power attenuator's use amount, independent anchor clamps annex in other test processes, reduces test work's mishandling rate to a platform that can use the automatic control procedure is used for promoting test work efficiency is provided.
Drawings
FIG. 1 is a block diagram of a switch matrix for testing a high-power meter-wave product according to the present invention;
fig. 2 is a circuit diagram of a single high power switch driving circuit of the present invention;
fig. 3 is a driving circuit diagram of the present invention;
FIG. 4 is a schematic diagram of a conventional testing system of the present invention;
fig. 5 is a schematic view of the testing system for testing the high-power meter-wave product 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 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.
Example one
The embodiment discloses a switch matrix for testing a high-power meter-wave product, and explains the use mode of the switch matrix in the testing work of the high-power meter-wave product.
As shown in fig. 1, a switch matrix for testing a high-power meter-wave product includes a high-power switch set, a driving circuit, and a test system control unit interface. Each port of a tested product is connected to a tested piece signal interface of the switch matrix, each path of signal is connected to a second-stage high-power single-pole multi-throw switch end by selecting one path of signal from the first-stage high-power single-pole multi-throw switch, and the selected signal is fed into an instrument by selecting the second-stage single-pole multi-throw high-power switch; when the test system is used for testing, commands sent by the upper computer are processed by the control unit and are sent to the driving circuit through the test system control unit interface, and the driving circuit converts the commands into driving signals required by the high-power single-pole multi-throw switch and sends the driving signals to the high-power switch to complete the selection of signal paths.
Specifically, the first-stage switch comprises 4 NR-SD relay switches, the second-stage switch comprises 1 NR-SD relay on-off switch, common ends of the 4 relay switches in the first-stage switch are connected with each other and are connected with the common end of the relay switch in the second-stage switch, only one branch end of the 4 relay switches in the first-stage switch is selected to be connected with a tested piece interface of the switch matrix, and two branch ends of the 1 relay switch in the second-stage switch are respectively connected with two instrument ports of the switch matrix, wherein the circuit is one of high-power single-pole multi-throw switch circuits, and the rest high-power single-pole multi-throw switch circuits with the function are all suitable for the technical scheme recorded in the application.
The drive circuit is: the external control command signal is connected 38 to the input terminal of the decoder through the low frequency connector interface, and then, for example, a driving circuit is taken as one of the paths, as shown in fig. 2, the signal translated by the decoder is connected to the B pole of the triode through a resistor R9, the E pole of the triode is connected to the ground, the C pole is connected to the cathode of the photodiode of the optocoupler chip through a resistor R17, the anode of the photodiode of the optocoupler chip is connected to the power supply circuit, the driving circuit is connected to the collector of the optocoupler, and the emitter of the optocoupler is connected to the relay switch for controlling the relay switch.
The control unit interface of the test system is as follows: using one DB-9 connector and a pair of DB-25 connectors, the power supply interface and the control interface of the switch matrix are integrated on the DB-9 connector, one pair of DB-25 connectors is used only for signal relaying, and one is used for fixing the aforementioned mechanical structure of the control unit. The control unit used in this embodiment is called a control dialer, and is configured to process a command sent from a PC of the test system, and further select a working mode of a product and a signal path of the switch matrix in a proper order, where a power supply used by the switch matrix is also provided by the control dialer.
As shown in fig. 1 and 3, a specific circuit diagram is provided for the present invention, which includes a high-power single-pole multi-throw switch circuit composed of a plurality of high-power switches, and a driving circuit; the utility model ensures the use frequency range of the switch matrix, the accessible high-power signal and the shorter switching time of the switch state by using the NR-SD relay; the isolation performance between power signals and control signals is improved by using the high-power relay switch and the optical coupler, and the anti-interference capability of the switch matrix in a high-power working state is enhanced.
The switch matrix for testing the high-power meter-wave product is used for testing a 4-port high-power meter-wave product in practical application.
Conventionally, when testing the high-power meter-wave product described in this embodiment, a test system such as fig. 4 needs to test a PC, a control dial box, 1 high-power attenuator for attenuating signals, 3 high-power loads for protecting the product, and various test instruments. When the test is carried out, when each port performance item is tested, the connection of the product, the attenuator and the instrument needs to be completed and checked, meanwhile, the working state of the product is manually controlled and confirmed, after the product is confirmed to be correct, the product is placed in the working state required by the test item, and the reading of the instrument is remotely or manually read by using a PC.
Use the utility model discloses the time, test this embodiment high-power meter ripples product can only use 2 high-power attenuators to carry on control code dialing ware to on the switch matrix, through the switching mouth on the switch matrix carries out being connected of code dialing controller and product, compares traditional mode and can reduce equipment. The test system is built as shown in fig. 5, in the test work, an operator only needs to complete the system building and confirm that the connection is correct, the manual operation of switching cables is omitted, the automatic test program can be directly used for controlling the whole system and completing the generation of the reading and the data report, and the product replacement can be completed only by operating the port of the product end after the test is completed.
Claims (4)
1. A switch matrix for testing a high-power meter wave product is characterized by comprising a high-power single-pole multi-throw switch, a drive circuit and a test system control unit interface;
each port of a tested product is connected with a tested piece signal interface of the switch matrix, each path of signal input into the switch matrix from the tested product selects one path of signal to be connected with a subsequent circuit by the first-stage high-power single-pole multi-throw switch, the selected signal is input into the sum end of the second-stage high-power single-pole multi-throw switch through the sum end of the first-stage high-power single-pole multi-throw switch, and the selected signal is sent to a test instrument through the instrument end interface of the switch matrix and the instrument port fed in by the second-stage single-pole multi-throw high-power switch;
the signal path selection state of the high-power single-pole multi-throw switch is controlled by the driving circuit, when a test is carried out, a computer end of a test system sends a communication command to a product and test tool cooperative control unit to judge a control signal to be sent to the switch matrix and a tested product, the control signal to be sent to the switch matrix is sent to the driving circuit by the unit through a test system control unit interface, and the driving circuit converts the control signal into a driving signal required by the high-power single-pole multi-throw switch and sends the driving signal to the high-power switch to complete the selection of the signal path.
2. The switch matrix according to claim 1, wherein the high power switch group comprises a plurality of high power relay switches, at least one of the high power relay switches forms the second stage high power single-pole multi-throw switch or instrument selector switch, and at least two of the high power relay switches forms the first stage high power single-pole multi-throw switch or product interface selector switch.
3. The switch matrix according to claim 1, wherein the driving circuit comprises a decoder, an optocoupler chip, and a transistor, the driving circuit receives a control command, sends the control command signal to the decoder to be processed into a single high level signal, and sends the high level signal to the B pole of the transistor in the corresponding driving path, and the C pole of the transistor is connected to the diode cathode of the optocoupler chip.
4. The switch matrix for high power meter wave product testing of claim 1, wherein the test system control unit interface primarily comprises a plurality of low frequency connectors.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222482276.0U CN218180999U (en) | 2022-09-19 | 2022-09-19 | Switch matrix for testing high-power meter wave product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222482276.0U CN218180999U (en) | 2022-09-19 | 2022-09-19 | Switch matrix for testing high-power meter wave product |
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| Publication Number | Publication Date |
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| CN218180999U true CN218180999U (en) | 2022-12-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202222482276.0U Active CN218180999U (en) | 2022-09-19 | 2022-09-19 | Switch matrix for testing high-power meter wave product |
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| Country | Link |
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| CN (1) | CN218180999U (en) |
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- 2022-09-19 CN CN202222482276.0U patent/CN218180999U/en active Active
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