CN215067003U - Automatic short-circuit prevention device for light valve and testing instrument - Google Patents
Automatic short-circuit prevention device for light valve and testing instrument Download PDFInfo
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- CN215067003U CN215067003U CN202120709030.5U CN202120709030U CN215067003U CN 215067003 U CN215067003 U CN 215067003U CN 202120709030 U CN202120709030 U CN 202120709030U CN 215067003 U CN215067003 U CN 215067003U
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Abstract
The utility model provides an automatic short-circuit prevention device of light valve and test instrument, the automatic short-circuit prevention device of light valve includes drive assembly, shelters from part and switch block, drive assembly connects in sheltering from the part, shelters from the part to the direction outstanding in drive assembly of keeping away from, shelters from the part and has primary importance and second place, drive assembly is used for the drive to shelter from part to primary importance or second place, shelters from the in-process break-make state that the part changed switch block at primary importance and second place switching. The test instrument comprises an interface for connecting the tested equipment and an automatic short-circuit prevention device of the light valve. The utility model discloses an automatic short circuit prevention device of light valve and test instrument for the tester must be at the test instrument and just can go up the electric operation after being connected by test equipment completion, then can't be by test equipment and test instrument disconnection by test equipment uninterrupted power supply, avoids operating personnel hot plug to cause by the condition emergence that test equipment damaged by test equipment.
Description
Technical Field
The utility model relates to an automatic short circuit prevention device of light valve and test instrument.
Background
After an optical instrument is tested in a factory, the power supply is firstly turned off according to the operation standard, and then the FPC cable is pulled out from a DMD (digital micromirror device) signal interface. Newly-entered staff and other staff who are not very familiar with the testing process of the optical machine are easy to operate according to the operating standard after the optical machine is tested, the FPC flat cable is often pulled out of the DMD signal interface first, and then the power supply is turned off. Due to the fact that high-frequency signals are subjected to hot plugging and unplugging, signal abnormity is easily caused, single Pixel or multiple pixels break down, and the DMD is damaged in a short circuit mode.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide an automatic short circuit prevention device of light valve and test instrument in order to overcome the defect that FPC winding displacement mistake hot plug easily causes the damage of DMD short circuit among the prior art.
The utility model discloses an above-mentioned technical problem is solved through following technical scheme:
the automatic short-circuit prevention device for the light valve is characterized by comprising a driving part, a shielding part and a switch part, wherein the driving part is connected with the shielding part, the shielding part protrudes in the direction far away from the driving part, the shielding part is provided with a first position and a second position, the driving part is used for driving the shielding part to the first position or the second position, and the on-off state of the switch part is changed in the switching process of the first position and the second position by the shielding part.
In this scheme, through setting up drive assembly, sheltering from part and switch part, the drive assembly drive shelters from the part and removes between primary importance and second place, shelters from the part and removes the in-process, and the switch part changes the on-off state to avoid operating personnel maloperation to lead to the condition of hot plug to take place.
Preferably, the switch component is an inductive switch, and the inductive switch is in non-contact with the driving component and the shielding component.
In this scheme, through setting up the switch part into inductive switch, inductive switch does not have physical contact with drive assembly and sheltering from the part in the course of the work to reduce the switch part and to drive assembly and shelter from the part blockking at the operation in-process, improve the automatic reliability of preventing short circuit device at the operation in-process of light valve.
Preferably, the driving part comprises a pneumatic push rod connected to the shielding part.
In this scheme, through selecting for use pneumatic push rod as driver part, pneumatic push rod need not to use other transmission medium such as hydraulic pressure oil, reduces driver part's the maintenance degree of difficulty.
Preferably, the light valve automatic short-circuit prevention device further comprises a guide member configured to limit a moving direction of the shielding member to be the same as a moving direction of the driving member.
Preferably, the guide part comprises a guide rail and a sliding block, the guide rail is arranged in a direction parallel to the movement direction of the driving part, one end of the sliding block is fixedly connected to the shielding part, and the other end of the sliding block is slidably connected to the guide rail.
In the scheme, the guide rail and the sliding block are arranged to limit the movement direction of the shielding component, and the shielding component can only move along the movement direction of the driving component under the limitation of the guide rail, so that the operation reliability of the automatic short-circuit prevention device of the light valve is improved.
Preferably, the light valve is a digital micromirror device.
A test instrument comprises an interface used for connecting a device to be tested, and is characterized by further comprising an automatic short circuit prevention device of a light valve, wherein the driving part is used for driving the shielding part to the first position or the second position, and when the shielding part is located at the first position, the shielding part shields the interface; when the shielding component is in the second position, the interface is not shielded by the shielding component.
Preferably, the test instrument further comprises a detection component, and the detection component is used for detecting the connection condition of the interface and the device to be tested.
In this scheme, through setting up the connected condition of detection part detection test instrument with by test equipment, avoid not connecting the condition direct control drive part that targets in place and drive and shelter from the part and shelter from the interface, reduce the possibility that operating personnel maloperation condition takes place.
Preferably, the test instrument further comprises a control unit for controlling the driving member to move according to the signal of the detecting member.
In the scheme, the control unit is arranged to receive the signal of the detection part and control the driving part to drive the shielding part to move, so that the automatic movement of the driving part is realized, and the automation degree of the test instrument is improved.
Preferably, the test instrument further comprises a manipulator member for automatically connecting the device under test with the test instrument through the interface.
In the scheme, the manipulator component is arranged, the joint of the tested equipment is grabbed by the manipulator component and is connected with the interface of the testing instrument, and the automatic connection of the tested equipment and the testing instrument is realized.
The utility model discloses an actively advance the effect and lie in:
the utility model discloses an automatic short-circuit prevention device of light valve and test instrument, through setting up the automatic short-circuit prevention device of light valve in the test instrument, the automatic short-circuit prevention device of light valve includes sheltering from part and drive assembly, after being connected by test equipment and test instrument, drive assembly drive shelter from the interface that test instrument and tested equipment sheltered from the part, and in sheltering from the equipment removal in-process, the switch part changes the break-make state and makes and is tested and set up the electricity; when a test instrument and tested equipment need to be disconnected, firstly, the driving equipment is controlled to drive the shielding equipment to expose an interface in the visual field of an operator, and in the process, the switch component enables the tested equipment to be powered off; the device is characterized in that the device comprises a test instrument, a test device and a power supply device, wherein the test instrument is connected with the test device through the power supply device, the power supply device is connected with the test device through the power supply device, and the power supply device is connected with the test device through the power supply device.
Drawings
Fig. 1 is a schematic structural diagram of the testing apparatus of the present invention.
Fig. 2 is a schematic structural diagram of the testing apparatus of the present invention.
Fig. 3 is a schematic structural diagram of the automatic short-circuit prevention device for light valve of the present invention.
Description of reference numerals:
automatic short-circuit prevention device 1 for light valve
Drive member 11
Connecting part 14
Device under test 3
Detailed Description
The present invention will be more clearly and completely described below by way of examples and with reference to the accompanying drawings, but the present invention is not limited thereto.
As shown in fig. 3, the utility model provides an automatic short-circuit prevention device 1 of light valve, automatic short-circuit prevention device 1 of light valve is including drive unit 11, shelter from part 12 and switch part (not shown in the figure), drive unit 11 connects in sheltering from part 12, shelter from part 12 to the direction outstanding in drive unit 11 of keeping away from, shelter from part 12 and have first position and second position, drive unit 11 is used for the drive to shelter from part 12 to first position or second position, shelter from part 12 and change switch part's on-off state at the in-process that first position and second position switched.
The driving part 11 includes a pneumatic push rod 111, and the pneumatic push rod 111 is connected to the shielding part 12.
The driving part 11 is connected with the shielding part 12 through a connecting part 14, the top end of the connecting part 14 is fixedly connected with the shielding part 12, and the bottom of the connecting part 14 is clamped at one end of the pneumatic push rod 111, which extends outwards. When the shielding member 12 is at the first position, the driving member 11 is at a position for driving the shielding member 12 to push out from the driving member 11 toward the shielding member 12, and when the shielding member 12 is at the second position, the driving member 11 is at a position for driving the shielding member 12 to retract inward from the shielding member 12 toward the driving member 11. After the shielding component 12 moves from the second position to the first position, the switch component is switched on; during the movement of the shutter member 12 from the first position to the second position, the switching member is de-energized.
The switch component is an inductive switch which is in non-contact with the driving component 11 and the shielding component 12.
The inductive switch is embedded in the base 15 and electrically connected to the device under test 3. After the tested device 3 is connected with the testing instrument 2, the driving part 11 drives the shielding part 12 to move to the first position, the inductive switch is communicated, and the tested device 3 is electrified; after the test of 3 by test equipment is accomplished, need to be by test equipment 3 and 2 disconnection on test instrument, the operator at first needs control drive assembly 11 drive to shelter from part 12 and move to the second position by the first position, in the in-process that shelters from part 12 and move to the second position, inductive switch disconnection, by test equipment 3 outage, after the second position that shelters from part 12 and move, just exposed in operating personnel's the field of vision by test equipment 3 and 2 connection interface 21, operating personnel just accomplishes the disconnection operation, ensure that operating personnel can not live plug by test equipment 3.
The automatic short-circuit prevention device for light valve 1 further comprises a guide member 13, and the guide member 13 is configured to restrict the movement direction of the shielding member 12 to be the same as the movement direction of the driving member 11.
The guide member 13 includes a guide rail 131 and a slider 132, the guide rail 131 is disposed parallel to the moving direction of the driving member 11, one end of the slider 132 is fixedly connected to the shielding member 12, and the other end of the slider 132 is slidably connected to the guide rail 131.
The guide rail 131 is fixedly installed on the base 15, a guide groove is formed in the upper end of the guide rail 131, the bottom end of the slider 132 is clamped to the guide rail 131 and can slide along the axial direction of the guide rail 131, and the shielding component 12 is fixedly connected to the slider 132 through a fastener, so that the shielding component 12 and the slider 132 move along the axial direction of the guide rail 131 together. The guide rail 131 and the slider 132 are provided to ensure the moving direction of the shutter member 12, prevent the moving direction of the shutter member 12 from deviating from the moving direction of the driving member 11, and ensure that the shutter member 12 can be accurately switched between the first position and the second position.
The light valve is a digital micromirror device.
A Digital Micromirror Device (DMD) is an array of high speed Digital light reflecting switches.
As shown in fig. 1 and fig. 2, the present invention further provides a testing apparatus 2, the testing apparatus 2 includes an interface 21 for connecting a tested device 3, the testing apparatus 2 further includes the above-mentioned light valve automatic short-circuit prevention device 1, the driving component 11 is used for driving the shielding component 12 to the first position or the second position, when the shielding component 12 is located at the first position, the shielding component 12 shields the interface 21; when the shielding member 12 is in the second position, the shielding member 12 does not shield the interface 21.
The automatic short-circuit prevention device 1 for the light valve is fixedly installed on the testing instrument 2, and an area for installing the tested equipment 3 is further arranged on the testing instrument 2. The interface 21 is used to connect the test instrument 2 with the device under test 3. In the present embodiment, the interface 21 is a DMD signal interface 21. When the shielding component 12 is located at the first position, the interface 21 is located under the shielding component 12, so that the shielding component 12 shields the interface 21, and the hot plugging and unplugging caused by misoperation are avoided. When the shielding member 12 is retracted to the second position, the shielding member 12 does not shield the interface 21, and the interface 21 is completely exposed.
The test apparatus 2 further comprises a detection component for detecting the connection condition of the interface 21 and the device under test 3. The testing instrument 2 further comprises a control unit for controlling the movement of the driving member 11 in dependence of the signal of the detection member.
The detection means is capable of detecting whether the device under test 3 is connected to the interface 21 and detecting whether the device under test 3 is correctly connected to the test instrument 2 through the interface 21. When the detection member detects that the device under test 3 is connected to the test instrument 2, the detection member sends a signal to the control unit to allow the driving member 11 to drive the shutter member 12 to move to the first position.
In this embodiment, the test apparatus 2 may further include a manipulator unit for automatically connecting the device under test 3 with the test apparatus 2 through the interface 21.
The manipulator unit is used for connecting the flat cable connector of the device under test 3 with the interface 21 of the test instrument 2, and after the device under test 3 is mounted on the test instrument 2, the control unit controls the manipulator unit to connect the test instrument 2 with the device under test 3. After the connection is finished, the detection part detects whether the connection between the test instrument 2 and the tested equipment 3 is correct, and if the connection is correct, the control unit controls the driving part 11 to drive the shielding part 12 to move to the first position; in the moving process of the shielding component 12, the switch component is conducted, and the tested device 3 is powered on to perform subsequent testing work.
Although specific embodiments of the present invention have been described above, it will be understood by those skilled in the art that this is by way of example only and that the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and the principles of the present invention, and these changes and modifications are all within the scope of the present invention.
Claims (10)
1. The automatic short-circuit prevention device for the light valve is characterized by comprising a driving part, a shielding part and a switch part, wherein the driving part is connected to the shielding part, the shielding part protrudes in the direction far away from the driving part, the shielding part is provided with a first position and a second position, the driving part is used for driving the shielding part to the first position or the second position, and the on-off state of the switch part is changed in the switching process of the first position and the second position by the shielding part.
2. The automatic short-circuit prevention device for light valves according to claim 1, wherein said switching means is an inductive switch, and said inductive switch is in non-contact with said driving means and said shielding means.
3. The automatic short-circuit prevention device for light valves of claim 1, wherein said driving means comprises a pneumatic push rod, said pneumatic push rod being connected to said shutter means.
4. The automatic short-circuit prevention device for light valves according to claim 3, further comprising a guide member disposed to restrict a moving direction of the shielding member from being the same as a moving direction of the driving member.
5. The automatic short-circuit preventer for light valves according to claim 4, wherein said guide member comprises a guide rail and a slider, said guide rail is disposed in parallel with the moving direction of said driving member, one end of said slider is fixedly connected to said shielding member, and the other end of said slider is slidably connected to said guide rail.
6. The automatic short-circuit prevention device for light valves according to any of claims 1-5, wherein the light valve is a digital micromirror device.
7. A test instrument comprising an interface for connecting a device under test, wherein the test instrument further comprises an automatic short-circuit prevention apparatus for a light valve according to any one of claims 1 to 6, wherein the driving means is configured to drive the shielding means to the first position or the second position, and wherein the shielding means shields the interface when the shielding means is in the first position; when the shielding component is in the second position, the interface is not shielded by the shielding component.
8. The test instrument of claim 7, further comprising a detection component for detecting connection of the interface to a device under test.
9. The test instrument of claim 8, further comprising a control unit for controlling the movement of the drive member in response to the signal from the detection member.
10. The test instrument of claim 9, further comprising a manipulator assembly for automatically connecting the device under test with the test instrument through the interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120709030.5U CN215067003U (en) | 2021-04-08 | 2021-04-08 | Automatic short-circuit prevention device for light valve and testing instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120709030.5U CN215067003U (en) | 2021-04-08 | 2021-04-08 | Automatic short-circuit prevention device for light valve and testing instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215067003U true CN215067003U (en) | 2021-12-07 |
Family
ID=79150681
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120709030.5U Active CN215067003U (en) | 2021-04-08 | 2021-04-08 | Automatic short-circuit prevention device for light valve and testing instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215067003U (en) |
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2021
- 2021-04-08 CN CN202120709030.5U patent/CN215067003U/en active Active
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