CN209640423U - A kind of numerical-control attenuator test fixture - Google Patents
A kind of numerical-control attenuator test fixture Download PDFInfo
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- CN209640423U CN209640423U CN201822051898.1U CN201822051898U CN209640423U CN 209640423 U CN209640423 U CN 209640423U CN 201822051898 U CN201822051898 U CN 201822051898U CN 209640423 U CN209640423 U CN 209640423U
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Abstract
The utility model discloses a kind of numerical-control attenuator test fixtures, are related to numerical-control attenuator field, including testboard, Test bench and crimping fixture；The testboard is electrically connected the Test bench, testboard is equipped with multiple control switches, transformer is equipped with inside testboard, Test bench upper surface is covered with test circuit board, input port and output port are respectively equipped on the test circuit board, the side of Test bench is equipped with the crimping fixture, described transformer one end and 220V AC power source are electrically connected, the other end and test circuit board are electrically connected, the utility model is directly connected to 220V AC power source using the transformer built in testboard, the on-off of signal excitation is controlled by control switch, reduce requirement of the test process to hardware device, greatly improve testing efficiency and convenience, it is provided with crimping fixture simultaneously, prevent the generation of measured device side force during crimping, guarantee stable signal transmission, test is accurate, reliably.
Description
Technical field
The utility model relates to numerical-control attenuator fields, particularly relate to a kind of numerical-control attenuator test fixture.
Background technique
Currently, the development of information technology, more and more frequency microwave devices have been applied to weapon with space flight and aviation
In system, aviation and communication product.Wherein numerical-control attenuator is widely used in all kinds of microwave hairs such as radar, electronic countermeasure, communication
It penetrates in the power amplifier module of system, therefore the accurate test of numerical-control attenuator becomes increasingly important.
Numerical-control attenuator belongs to non-coaxial frequency microwave device, can not directly with the vector network analyzer phase of coaxial interface
Repeatedly kick into capable test, it is therefore necessary to which the test circuit for designing a kind of impedance matching utmostly reduces mismatch, while ensureing and testing
Good, realization signal stabilization transmission is contacted in journey.In addition, numerical-control attenuator is usually made of the unit of multiple and different attenuations,
Need to apply the excitation of multichannel unlike signal in test process, traditional test methods are usually to provide signal using more AC power sources
The mode of excitation is completed, not only more demanding to hardware resource and quantity and very complicated and time-consuming.Therefore, how to facilitate, fastly
Prompt realization is accurately tested and is particularly important.
Utility model content
In view of this, improving testing efficiency the purpose of this utility model is that propose a kind of numerical-control attenuator test fixture
And convenience.
Based on a kind of above-mentioned purpose numerical-control attenuator test fixture provided by the utility model, including testboard, test base
Seat and crimping fixture；
The testboard is electrically connected the Test bench, and testboard comes for generating multiple signals excitation to measured device
It is detected, testboard is equipped with multiple control switches, is equipped with transformer inside testboard, Test bench upper surface is covered with survey
Circuit board is tried, input port and output port are respectively equipped on the test circuit board, the side of Test bench is equipped with the pressure
Welding fixture, crimping fixture are used to for measured device to be fixed on test circuit board, described transformer one end and 220V AC power source
It is electrically connected, the other end and test circuit board are electrically connected, and are connected and are set in the control loop that transformer is connect with test circuit board
The multiple control switch, test voltage needed for transformer generates are set, and is controlled in control loop often by multiple control switches
The on-off of one tributary signal excitation.
Optionally, the fixed Test bench in the testboard upper surface, the input port and the output port pair
Side setting is on test circuit board.
Optionally, the test circuit board upper surface be equipped with crimp region, the crimp region by microstrip line with it is described
Input port and the output port are electrically connected.
Optionally, the crimp region is equipped with two panels unilateal conduction film, unilateal conduction film described in two panels respectively with it is described defeated
The microstrip line at inbound port end and the microstrip line at the output port end are electrically connected.
Optionally, the Test bench side is fixed with fixed pedestal, and the crimping folder is fixed on the fixed pedestal
Tool, the crimping fixture includes supporting table, handle and push-pull rod, and be slidably connected the push-pull rod in the supporting table, push-pull rod
It is arranged in parallel with supporting table, the handle and supporting table are hinged, and push-pull rod is connected linkage with handle.
Optionally, the push-pull rod is fixed with crimp block far from one end of the handle.
Optionally, the crimp block is located at the surface of the crimp region.
From the above it can be seen that a kind of numerical-control attenuator test fixture provided by the utility model is using in testboard
The transformer set is directly connected to 220V AC power source, controls each tributary signal excitation in control loop by control switch
On-off, multiple signals excitation, reduces requirement of the test process to hardware device, greatly improves test needed for providing test
Efficiency and convenience.It is provided with crimping fixture simultaneously, prevents the generation of measured device side force during crimping, guarantees that signal passes
Defeated stabilization, test are accurate, reliable.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model embodiment；
Fig. 2 is the structural schematic diagram that fixture is crimped in the utility model embodiment；
Fig. 3 is the circuit diagram of the utility model embodiment；
Fig. 4 is the circuit diagram of transformer control circuit in the utility model embodiment；
Fig. 5 is the HMC472 series of attenuators encapsulation tested in the utility model embodiment and specific pin definition figure.
Specific embodiment
For the purpose of this utility model, technical solution and advantage is more clearly understood, below in conjunction with specific embodiment, and
Referring to attached drawing, the utility model is further described, the utility model proposes a kind of numerical-control attenuator test fixtures, pass through
The mode of multiple signals excitation is provided, requirement of the test process to hardware device is reduced, greatly improves testing efficiency and just
Victory.
As one embodiment, a kind of numerical-control attenuator test fixture provided by the utility model, including testboard, test
Pedestal and crimping fixture；
The testboard is electrically connected the Test bench, and testboard comes for generating multiple signals excitation to measured device
It is detected, testboard is equipped with multiple control switches, is equipped with transformer inside testboard, Test bench upper surface is covered with survey
Circuit board is tried, input port and output port are respectively equipped on the test circuit board, the side of Test bench is equipped with the pressure
Welding fixture, crimping fixture are used to for measured device to be fixed on test circuit board, described transformer one end and 220V AC power source
It is electrically connected, the other end and test circuit board are electrically connected, and are connected and are set in the control loop that transformer is connect with test circuit board
The multiple control switch, test voltage needed for transformer generates are set, and is controlled in control loop often by multiple control switches
The on-off of one tributary signal excitation.
By the design of the device, 220V AC power source is directly connected to using the transformer built in testboard, passes through control
The on-off that each tributary signal motivates in switch control control loop, multiple signals excitation, reduces needed for providing test
Requirement of the test process to hardware device, greatly improves testing efficiency and convenience.Simultaneously be provided with crimping fixture, prevent by
The generation of device side force during crimping is surveyed, guarantees stable signal transmission, test is accurate, reliable.
Relatively good implementation of the present invention is described in detail below.
Tradition takes the test method of numerical-control attenuator and provides the test mode of desired signal excitation using more power supplys,
Higher for hardware resource requirements, test process is complicated, inefficiency, and easily misconnection, miss.In addition, conventional test methodologies
The mode manually crimped is usually taken during the test, crimps dynamics direction difference every time, be easy to cause crimping loosely
Or the phenomenon that damage device.The application of very good solution of the present invention these problems, the invention can be improved in batch production process
The testing efficiency and measuring accuracy of device.
Referring to Fig. 1, including that testboard 1, Test bench 3 and crimping fixture 8, the testboard 1 are electrically connected the survey
Pedestal 3 is tried, for testboard 1 for generating multiple signals excitation to detect to measured device, testboard 1 is equipped with multiple controls
Switch 2 is equipped with transformer inside testboard 1, and the transformer and 220V AC power source are electrically connected, transformer also with multiple institutes
The electric connection of control switch 2 is stated, a kind of optional mode of control switch 2 here may be used using toggle switch in the present embodiment
To realize opening and closing function using other kinds of switch.3 upper surface of Test bench is covered with test circuit board, the test circuit
Input port 4 and output port 5 are respectively equipped on plate, the side of Test bench 3 is equipped with the crimping fixture 8, and crimping fixture 8 is used
It is tested on circuit board in measured device to be fixed on.1 upper surface of testboard is fixed with the Test bench 3, the input
Test bench 3 is directly placed on testboard 1, just by port 4 and the setting of 5 opposite side of the output port on test circuit board
It is welded in 1 internal wiring of testboard and test circuit board, convenient for wiring.The test circuit board upper surface is equipped with crimping area
Domain 6, the crimp region 6 are electrically connected by microstrip line and the input port 4 and the output port 5.The crimping area
Domain 6 is equipped with unilateal conduction film (not shown), the microstrip line and institute at the unilateal conduction film and 4 end of input port
The microstrip line for stating 5 end of output port is electrically connected.Unilateal conduction film is that longitudinal (i.e. perpendicular to the direction of conductive film surface) is conductive,
Laterally nonconducting medium ensure that test process for guaranteeing that device under test electrode and the contact for testing circuit board are good
Stability.3 side of Test bench is fixed with fixed pedestal 7, and the crimping fixture is fixed on the fixed pedestal 7.
Referring to Fig. 2, the crimping fixture 8 includes supporting table 81, handle 82 and push-pull rod 83, slided in the supporting table 81
The dynamic connection push-pull rod 83, push-pull rod 83 are arranged in parallel with supporting table 81, and the handle 82 and supporting table 81 are hinged, push-pull rod
83 are connected linkage with handle 82.The push-pull rod 83 is fixed with crimp block 74 far from one end of the handle 82.The crimp block
74 are located at the surface of the crimp region 6.
Crimping fixture 8 up pulls handle 83 when using, and the push-pull rod 83 for making to be connected with it linkage bounces back, crimp block 74 with
The distance between crimp region 6 increases, at this point, device under test is placed in crimp region 6, so that the pin of device under test
It directly bears against on test circuit board；Then, lower pushing handle 82 makes to push away the ejection downwards of push-pull rod 83, crimp block 74 and crimp region 6
The distance between reduce, crimp block 74 directly bears against on device under test, and elastic material can be selected in crimp block 74, and protection has been arrived to be measured
Device avoids push-pull rod 83 from directly contacting device under test, and then damages device under test.Crimp block 74 makes device under test
Pin is critically fitted in test circuit board surface, and is fixed, and prevents the generation of crimping process side force, guarantees test process
Middle stable signal transmission, test are accurate, reliable.
Since the pin of measured device is relatively thin, more crisp, plug-type crimping fixture 8 is selected, is vertically crimped,
Crimping fixture 8 is a kind of fast clamp, the opening fixture according to mechanical four-bar mechanism dead point principle production, is bought by market
Obtain, have the characteristics that accurate positioning, handling quickly, being capable of self-locking clamping.
Referring to Fig. 3, choosing the HMC472 series of attenuators of HITTITE company production in the present embodiment specifically as research pair
As according to the working principle and internal structure of HMC472 series of attenuators, design test circuit diagram.HMC472 series of attenuators is
A kind of variable attenuator, working frequency cover DC~3.8GHz, and 50 Ω characteristic impedances are controlled by Transistor-Transistor Logic level, internal usual
It is made of the differential declines unit such as 0.5dB, 1dB, 2dB, 4dB, 8dB, 16dB, dB is attenuator unit for electrical property parameters attenuation
Unit is the unit of signal strength, and up to tens kinds, every kind of pad value test need to provide not test pad value needed for numerical-control attenuator
Same signal excitation, it is higher to hardware resource requirements.The present embodiment is directly connected to 220V friendship using the transformer built in testboard 1
Galvanic electricity source, 220V DC power supply is converted into testing required low-voltage dc power supply by transformer, then is controlled and passed by toggle switch
The on-off that the defeated signal to each pass foot of numerical-control attenuator motivates, wherein being feeder ear (VDD), six road low and high levels letter all the way
Number end (respectively corresponds as V1-V6), different dB units correspond to the different pin of chip and input, and provide test in this way
The differential declines unit such as required 0.5dB, 1dB, 2dB, 4dB, 8dB, 16dB greatly reduces the demand tested to hardware, side
Just quick.
RF1 and RF2 is the input terminal and output end of signal, respectively corresponds input port 4 and output port 5.It will test electricity
The input port 4 and output port 5 of road plate are connect respectively in two test ports of vector network analyzer, put through 220V exchange
After the switch of power supply, test can be realized.
Referring to Fig. 4, having the control circuit of transformer and transformer in switching circuit, depressor is directly connected to 220V friendship
Galvanic electricity source, 220V DC power supply is converted into testing required low-voltage dc power supply by transformer, then is controlled and passed by toggle switch
The on-off that the defeated signal to each pass foot of numerical-control attenuator motivates, wherein being feeder ear (VDD), six road low and high levels letter all the way
Number end (respectively corresponds as V1-V6), different dB units correspond to the different pin input of chip, provide test institute in this way
The differential declines units such as 0.5dB, 1dB, 2dB, 4dB, 8dB, the 16dB needed, wherein simplest pressure stabilizing can be used in voltage regulator circuit
Triode unit.
Referring to Fig. 5, wherein RF1 and RF2 is the input terminal and output end of signal, VDD is power end, and V1 to V6 is height
Low level control end, N/C are idle end.HMC472 series of attenuators is surface mounting component, can directly be docked with test circuit board,
It is tested.
The utility model is directly connected to 220V AC power source using the transformer built in testboard, is controlled by control switch
The on-off that each tributary signal motivates in control loop, multiple signals excitation, reduces test process needed for providing test
Requirement to hardware device, greatly improves testing efficiency and convenience.It is provided with crimping fixture simultaneously, prevents measured device from existing
The generation of side force during crimping, guarantees stable signal transmission, and test is accurate, reliable.
It should be understood by those ordinary skilled in the art that: the discussion of any of the above embodiment is exemplary only, not
It is intended to imply that the scope of the present disclosure (including claim) is limited to these examples；Under the thinking of the utility model, the above reality
Applying can also be combined between the technical characteristic in example or different embodiments, and there are the utility model as described above
Many other variations of different aspect, for simplicity, they are not provided in details.Therefore, all spirit in the utility model
Within principle, any omission, modification, equivalent replacement, improvement for being made etc. should be included in the protection scope of the utility model
Within.
Claims (7)
1. a kind of numerical-control attenuator test fixture, which is characterized in that including testboard (1), Test bench (3) and crimping fixture
(8)；
The testboard (1) is electrically connected the Test bench (3), and testboard (1) comes for generating multiple signals excitation to quilt
It surveys device to be detected, testboard (1) is equipped with multiple control switches (2), and transformer is equipped with inside testboard (1), tests base
Seat (3) upper surface is covered with test circuit board, is respectively equipped with input port (4) and output port (5) on the test circuit board,
The side of Test bench (3) is equipped with the crimping fixture (8), and crimping fixture (8) is used to measured device being fixed on test circuit
On plate, described transformer one end and 220V AC power source are electrically connected, and the other end and test circuit board are electrically connected, transformer with
It is arranged in series the multiple control switch (2) in the control loop of test circuit board connection, test voltage needed for transformer generates,
And the on-off of each tributary signal excitation in control loop is controlled by multiple control switches (2).
2. a kind of numerical-control attenuator test fixture according to claim 1, which is characterized in that testboard (1) upper end
The fixed Test bench (3) in face, the input port (4) and the setting of the output port (5) opposite side are on test circuit board.
3. a kind of numerical-control attenuator test fixture according to claim 2, which is characterized in that table on the test circuit board
Face is equipped with crimp region (6), and the crimp region (6) passes through microstrip line and the input port (4) and the output port (5)
It is electrically connected.
4. a kind of numerical-control attenuator test fixture according to claim 3, which is characterized in that the crimp region (6) sets
There is two panels unilateal conduction film, the microstrip line and the output that unilateal conduction film described in two panels is held with the input port (4) respectively
The microstrip line at port (5) end is electrically connected.
5. a kind of numerical-control attenuator test fixture according to claim 3, which is characterized in that the Test bench (3) one
Side is fixed with fixed pedestal (7), and the crimping fixture (8), crimping fixture (8) packet are fixed on the fixed pedestal (7)
Supporting table (81), handle (82) and push-pull rod (83) are included, is slidably connected on the supporting table (81) push-pull rod (83), is pushed and pulled
Bar (83) is arranged in parallel with supporting table (81), the handle (82) and supporting table (81) hingedly, push-pull rod (83) and handle (82)
Linking linkage.
6. a kind of numerical-control attenuator test fixture according to claim 5, which is characterized in that the push-pull rod (83) is separate
One end of the handle (82) is fixed with crimp block (74).
7. a kind of numerical-control attenuator test fixture according to claim 6, which is characterized in that the crimp block (74) is located at
The surface of the crimp region (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822051898.1U CN209640423U (en) | 2018-12-07 | 2018-12-07 | A kind of numerical-control attenuator test fixture |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822051898.1U CN209640423U (en) | 2018-12-07 | 2018-12-07 | A kind of numerical-control attenuator test fixture |
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| Publication Number | Publication Date |
|---|---|
| CN209640423U true CN209640423U (en) | 2019-11-15 |
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| CN201822051898.1U Active CN209640423U (en) | 2018-12-07 | 2018-12-07 | A kind of numerical-control attenuator test fixture |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112904052A (en) * | 2021-01-26 | 2021-06-04 | 航天科工防御技术研究试验中心 | Clamp for testing numerical control attenuator |
-
2018
- 2018-12-07 CN CN201822051898.1U patent/CN209640423U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112904052A (en) * | 2021-01-26 | 2021-06-04 | 航天科工防御技术研究试验中心 | Clamp for testing numerical control attenuator |
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