CN220105244U - Test circuit and test fixture using tungsten filament lamp - Google Patents
Test circuit and test fixture using tungsten filament lamp Download PDFInfo
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- CN220105244U CN220105244U CN202321656869.2U CN202321656869U CN220105244U CN 220105244 U CN220105244 U CN 220105244U CN 202321656869 U CN202321656869 U CN 202321656869U CN 220105244 U CN220105244 U CN 220105244U
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- tungsten filament
- tungsten
- test
- filament lamp
- lamp
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- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 title claims abstract description 81
- 229910052721 tungsten Inorganic materials 0.000 title claims abstract description 81
- 239000010937 tungsten Substances 0.000 title claims abstract description 81
- 238000012360 testing method Methods 0.000 title claims abstract description 69
- 239000003990 capacitor Substances 0.000 claims description 12
- 230000000694 effects Effects 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 3
- 230000010355 oscillation Effects 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
Abstract
The utility model relates to a test circuit and a test fixture using a tungsten filament lamp, wherein the test circuit comprises a fixture circuit board, and related components of the test circuit are arranged on the fixture circuit board; the test circuit comprises a tungsten filament lamp, the output end of the controller is electrically connected to one end of the tungsten filament lamp, and the other end of the tungsten filament lamp is grounded; the tooling circuit board is also provided with a plurality of access ports for electrically connecting the output ends of the controllers and a grounding port for grounding. The utility model has the effect of improving EMC test accuracy.
Description
Technical Field
The utility model relates to the field of power electronics, in particular to a test circuit and a test fixture using a tungsten lamp.
Background
In the process of EMC test, an LED is generally connected in series with the output end of the controller, and if the LED does not emit light in the whole process of EMC test, the passing of the EMC test is indicated. To facilitate the observance of the lighting of the LED by the tester, EMC testing is typically performed in a dark environment.
However, in the actual testing process, the circuit in the controller will oscillate due to the interference of the antenna, so that the LED is interfered and emits tiny light, but the light emission of the LED is not affected by EMC. Since the EMC test is in a dark environment, the LED emitting a minute light is also relatively obvious to the tester, resulting in an affected EMC test result.
Disclosure of Invention
In order to improve the accuracy of EMC test, the utility model provides a test circuit and a test fixture using a tungsten lamp.
The utility model provides a test circuit and a test fixture for a tungsten filament lamp, which adopts the following technical scheme:
the test circuit comprises a tungsten filament lamp, wherein the output end of the controller is electrically connected to one end of the tungsten filament lamp, and the other end of the tungsten filament lamp is grounded.
By adopting the technical scheme, the tungsten lamp is utilized to play an indication role, and if the tungsten lamp is lightened in EMC test, the EMC test is not passed; and the tungsten lamp is utilized to resist the interference generated by the oscillation of the connecting line as much as possible, so that the accuracy of EMC test is improved.
Preferably, the test circuit further comprises a protection resistor, and the grounding end of the tungsten filament lamp is grounded through the protection resistor.
By adopting the technical scheme, the protection resistor is utilized to play a role in limiting current, so that the phenomenon that the normal operation of the tungsten filament lamp is influenced due to overhigh current flowing through the tungsten filament lamp is avoided.
Preferably, a capacitor is connected in series with two ends of the tungsten filament lamp, the positive electrode of the capacitor is electrically connected to the power supply end of the tungsten filament lamp, and the other end of the capacitor is electrically connected to the ground end of the tungsten filament lamp.
By adopting the technical scheme, the capacitor is utilized to play a role in stabilizing voltage, so that the tungsten filament lamp can work more stably.
Preferably, a switch is connected in series between the tungsten lamp and the output end of the controller.
By adopting the technical scheme, the related staff can control the start of the test more easily by using the switch.
The utility model provides an utilize test fixture of tungsten filament lamp, includes the frock circuit board, install the tungsten filament lamp in the above-mentioned test circuit that utilizes tungsten filament lamp on the frock circuit board, still be provided with a plurality of access ports that are used for the electricity to connect the controller output on the frock circuit board to and be used for the ground connection port of ground connection.
By adopting the technical scheme, the tool circuit board is utilized to enable related staff to easily implement test work based on the test circuit.
Preferably, the test circuit is provided with a plurality of groups, and each tungsten filament lamp corresponds to one of the mounting hole, the access port and the grounding port.
By adopting the technical scheme, related staff can observe the test results of the output ends of the plurality of groups of controllers at the same time.
Preferably, the tooling circuit board is further provided with a plurality of empty mounting holes.
By adopting the technical scheme, the empty mounting holes are utilized to enable related staff to increase the mounting quantity of the tungsten filament lamps according to the test conditions.
Preferably, the tooling circuit board is further provided with a plurality of empty positioning holes.
By adopting the technical scheme, the tool circuit board is positioned and installed in other tool plates or PCB boxes through bolts, and the operation of staff is facilitated.
In summary, the present utility model includes at least one of the following beneficial technical effects:
1. the tungsten lamp is used for replacing the LED, so that interference caused by vibration of a connecting line can be resisted to the greatest extent, and the accuracy of EMC test is improved;
2. the tool circuit board is utilized to realize the installation of a plurality of groups of test circuit components, so that related staff can observe the test results more intuitively and conveniently.
Drawings
FIG. 1 is a circuit diagram of embodiment 1 of the present utility model;
fig. 2 is a schematic overall structure of embodiment 2 of the present utility model.
Reference numerals: 1. a tooling circuit board; 11. a ground port; 12. an access port; 13. a mounting hole; 14. positioning holes; 2. a protection resistor; 3. tungsten filament lamp; 4. and (3) a switch.
Detailed Description
The utility model is described in further detail below with reference to fig. 1-2.
Example 1:
the embodiment of the utility model discloses a test circuit utilizing a tungsten filament lamp.
Referring to fig. 1, a test circuit using a tungsten lamp includes a tungsten lamp L, a capacitor C, and a protection resistor R. One end of the tungsten filament lamp L is electrically connected to the output end of the controller, the other end of the tungsten filament lamp L is electrically connected to one end of the protection resistor R, and the other end of the protection resistor R is grounded. The positive electrode of the capacitor C is electrically connected to one end of the tungsten filament lamp L for electrically connecting with the output end of the controller, and the negative electrode of the capacitor C is electrically connected to one end of the tungsten filament lamp L for electrically connecting with the protection resistor R. The protection resistor R is used for limiting the voltage at two ends of the tungsten filament lamp L and plays a role of overvoltage protection. The capacitor C plays a role in stabilizing voltage, so that the tungsten lamp L can normally emit light.
Besides, a switch K is connected in series between the output end of the control and the tungsten filament lamp L, and the switch K is arranged on the tool circuit board so that relevant staff can start testing.
The tungsten lamp L plays a role of lighting indication, namely, when the tungsten lamp L lights, the current EMC test is not passed. The tungsten lamp L has a lower sensitivity than the LED. If the LED is adopted, the luminous indication effect can be achieved, but when the LED is interfered, the LED can still emit slightly bright light, and related staff cannot easily judge whether the slightly bright light emitted by the LED at the moment is caused by the fact that EMC test fails or is caused by the fact that a connecting line oscillates, so that accuracy of the EMC test can be affected. The minimum voltage of the tungsten filament lamp L is higher than the minimum voltage of the LED, so that the tungsten filament lamp L is not easy to emit light due to oscillation interference of a connecting line, and the EMC test result is more accurate.
The embodiment of the utility model relates to a test circuit utilizing a tungsten filament lamp and an implementation principle of a test tool, wherein the implementation principle is as follows: by using tungsten filament lamp to replace LED, interference caused by vibration of the connecting line can be resisted to the greatest extent, and accuracy of EMC test is improved.
Example 2:
the embodiment 2 of the utility model discloses a test fixture utilizing a tungsten lamp 3.
Referring to fig. 1 and 2, a test fixture using tungsten filament lamps 3 includes a fixture circuit board 1, and a plurality of groups of tungsten filament lamps 3, protection resistors 2 and switches 4 in the test circuit are all mounted on the fixture circuit board 1. The tooling circuit board 1 is also provided with a plurality of access ports 12 corresponding to the switches 4 and a plurality of grounding ports 11 corresponding to the tungsten lamps 3, which are respectively used for connecting the output end of the controller with the ground.
The whole frock circuit board 1 is rectangular plate, and the frock circuit board 1 is close to short dimension edge and has seted up a plurality of mounting holes 13 that are used for installing tungsten filament lamp 3, and a plurality of mounting holes 13 are along frock circuit board 1 short dimension direction equidistance distribution, and the mounting hole 13 is arranged to have two rows in this embodiment. The tungsten filament lamp 3 is arranged in the mounting hole 13, and a plurality of empty mounting holes 13 are arranged in the embodiment so as to increase more tungsten filament lamps 3 according to the test condition; and in this embodiment the number of switches 4 is greater than the number of tungsten lamps 3 to be mounted, the remaining switches 4 being ready for use. The grounding ports 11 are arranged between the two rows of tungsten filament lamps 3, the protection resistors 2 are arranged on one side of the tungsten filament lamps 3 along the length direction of the tooling circuit board 1 in a one-to-one correspondence mode, the protection resistors 2 electrically connected with each row of tungsten filament lamps 3 are all located on the same side of the tungsten filament lamps 3, and the protection resistors 3 are located on one side, far away from the grounding ports 11, of the tungsten filament lamps 3. The plurality of switches 4 are distributed at equal intervals along the short dimension direction of the tool circuit board 1, and in the embodiment, the switches 4 are arranged in five rows, and the plurality of access ports 12 are arranged among the plurality of rows of switches 4. In addition, the capacitor can be mounted on a circuit board.
The tooling circuit board 1 is also provided with a plurality of positioning holes 14 so as to position and install the tooling circuit board 1 in other tooling plates or PCB boxes through bolts, thereby facilitating the assembly of staff.
The implementation principle of the test fixture using the tungsten filament lamp 3 in the embodiment of the utility model is as follows: by mounting components in the plurality of groups of test circuits on the tooling circuit board 1, relevant staff can observe the test results more intuitively.
The above embodiments are not intended to limit the scope of the present utility model, so: all equivalent changes in structure, shape and principle of the utility model should be covered in the scope of protection of the utility model.
Claims (8)
1. A test circuit using tungsten filament lamp based on controller, characterized in that: the intelligent tungsten filament lamp comprises a tungsten filament lamp (3), wherein the output end of the controller is electrically connected to one end of the tungsten filament lamp (3), and the other end of the tungsten filament lamp (3) is grounded.
2. A test circuit using a tungsten lamp as defined in claim 1, wherein: the test circuit further comprises a protection resistor (2), and the grounding end of the tungsten filament lamp (3) is grounded through the protection resistor (2).
3. A test circuit using a tungsten lamp as defined in claim 1, wherein: the two ends of the tungsten filament lamp (3) are connected in series with a capacitor C, the positive electrode of the capacitor C is electrically connected to the power supply end of the tungsten filament lamp (3), and the other end of the capacitor C is electrically connected to the grounding end of the tungsten filament lamp (3).
4. A test circuit using a tungsten lamp as defined in claim 1, wherein: a switch (4) is connected in series between the tungsten filament lamp (3) and the output end of the controller.
5. A test fixture utilizing tungsten filament lamps is characterized in that: the test circuit comprises a tool circuit board (1), wherein a mounting hole (13) is formed in the tool circuit board (1), the tungsten lamp (3) in the test circuit using the tungsten lamp according to any one of claims 1-4 is mounted in the mounting hole (13), and an access port (12) for electrically connecting an output end of the controller and a grounding port (11) for grounding are further formed in the tool circuit board (1).
6. The test fixture for tungsten lamps according to claim 5 wherein: the test circuit is provided with a plurality of groups, and each tungsten filament lamp (3) corresponds to one mounting hole (13), the access port (12) and the grounding port (11).
7. The test fixture for a tungsten lamp according to claim 6, wherein: and a plurality of empty mounting holes (13) are additionally formed in the tool circuit board (1).
8. The test fixture for tungsten lamps according to claim 5 wherein: and the tooling circuit board (1) is also provided with a positioning hole (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321656869.2U CN220105244U (en) | 2023-06-27 | 2023-06-27 | Test circuit and test fixture using tungsten filament lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321656869.2U CN220105244U (en) | 2023-06-27 | 2023-06-27 | Test circuit and test fixture using tungsten filament lamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220105244U true CN220105244U (en) | 2023-11-28 |
Family
ID=88844311
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321656869.2U Active CN220105244U (en) | 2023-06-27 | 2023-06-27 | Test circuit and test fixture using tungsten filament lamp |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220105244U (en) |
-
2023
- 2023-06-27 CN CN202321656869.2U patent/CN220105244U/en active Active
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