CN215728722U - Shell state detection device of super-radiation semiconductor diode - Google Patents
Shell state detection device of super-radiation semiconductor diode Download PDFInfo
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- CN215728722U CN215728722U CN202121965680.2U CN202121965680U CN215728722U CN 215728722 U CN215728722 U CN 215728722U CN 202121965680 U CN202121965680 U CN 202121965680U CN 215728722 U CN215728722 U CN 215728722U
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Abstract
The utility model relates to the technical field of diode detection, and discloses a tube shell state detection device of a super-radiation semiconductor diode, which comprises a signal source, a differential amplification circuit, a first connecting end, a second connecting end and an output signal processing unit, wherein the signal output end of the signal source is respectively and electrically connected with the first connecting end and the positive input end of the differential amplification circuit, the negative input end of the differential amplification circuit is electrically connected with the second connecting end, the signal output end of the differential amplification circuit, the signal output end of the signal source and the second connecting end are respectively and electrically connected with the output signal processing unit, when in actual use, the output signal processing unit analyzes and displays the signals of the signal output end of the differential amplification circuit, the signal output end of the signal source and the second connecting end, and when the tube shell of the super-radiation light-emitting diode displays different display states in short circuit, open circuit or non-good contact fault, therefore, the state detection of the tube shell and the pin of the super-radiation light-emitting diode is realized.
Description
Technical Field
The utility model relates to the technical field of diode detection, in particular to a shell state detection device of a super-radiation semiconductor diode.
Background
Super-luminescent diode (SLD) is an excellent high-power broadband light source, as shown in fig. 1, and has an appearance of a butterfly with 14 pins, and the main body is a metal tube shell and 14 metal pins insulated from the metal tube shell. One of the possible failures of superluminescent light emitting diodes during the manufacturing process is: short circuit occurs between the tube pin and the tube shell, so that an instrument is needed to detect the short circuit fault between the tube shell and the tube pin as an important ring of a product quality inspection link.
The existing logic tester for the short-circuit fault of the super-radiation light-emitting diode detects whether current flows from a pin to a tube shell by using a base electrode of an NPN type triode circuit, and detects the short-circuit state between the pin and the tube shell in such a way, but the method can not well detect the non-good contact short-circuit fault between the pin and the tube shell, wherein the non-good contact short-circuit fault means that the pin and the tube shell are connected but the fault point is not well contacted, when the resistance grade or the diode grade of a related instrument such as a multimeter is used for measurement, the connection state of a large resistance characteristic or a diode characteristic is shown, the base electrode of the triode has no current or insufficient current at the moment, the triode can not work, and the current tester is judged to be in a circuit-breaking state.
SUMMERY OF THE UTILITY MODEL
In view of the defects of the background art, the utility model provides a device for detecting the state of a tube shell of a super-radiation semiconductor diode, and aims to solve the technical problem that the existing short-circuit fault logic tester of the super-radiation light-emitting diode based on an NPN type triode circuit cannot detect the non-good contact short-circuit fault of the super-radiation light-emitting diode.
In order to solve the technical problems, the utility model provides the following technical scheme: a tube shell state detection device of a super-radiation semiconductor diode comprises a signal source, a differential amplification circuit, a first connecting end, a second connecting end and an output signal processing unit, wherein the signal source is configured to generate a detection signal, a signal output end of the signal source is electrically connected with the first connecting end and a positive input end of the differential amplification circuit respectively, a negative input end of the differential amplification circuit is electrically connected with the second connecting end, and a signal output end of the differential amplification circuit, a signal output end of the signal source and the second connecting end are electrically connected with the output signal processing unit respectively.
In one embodiment, the output signal processing unit is an oscilloscope, and the oscilloscope displays signals at the signal output terminal of the differential amplification circuit, the signal output terminal of the signal source, and the second connection terminal.
In one embodiment, the detection signal output by the signal source is a sinusoidal signal with adjustable frequency or a square wave signal with adjustable frequency and pulse width.
In one embodiment, the differential amplifier circuit includes an operational amplifier CMP, a resistor R1, a resistor R2, a resistor R3, and a resistor R4, a positive input terminal of the differential amplifier CMP is electrically connected to one end of the resistor R1 and one end of the resistor R3, another end of the resistor R1 is electrically connected to a signal output terminal of the signal source, another end of the resistor R3 is electrically connected to an output terminal of the differential amplifier CMP, a negative input terminal of the differential amplifier CMP is electrically connected to one end of the resistor R2 and one end of the resistor R4, another end of the resistor R2 is electrically connected to the second connection terminal, and another end of the resistor R4 is grounded.
In a certain embodiment, the output signal processing unit includes a controller and a display unit, a signal receiving end of the controller is electrically connected to the signal output end of the differential amplifying circuit, the signal output end of the signal source, and the second connecting end, respectively, and the controller is electrically connected to the display unit.
In a certain embodiment, the display unit is a display screen or a plurality of indicator lights, and the controller displays the detection information through the display screen or drives the indicator lights to illuminate to display the detection information.
Compared with the prior art, the utility model has the beneficial effects that: the signal output end of the signal source is respectively and electrically connected with the positive input end and the first connecting end of the differential amplifying circuit, namely the pin of the super-radiation light-emitting diode, the second connecting end is electrically connected with the tube shell of the super-radiation light-emitting diode, then the output signal processing unit is used for analyzing and displaying the signals of the signal output end of the differential amplifying circuit, the signal output end of the signal source and the second connecting end, and when the tube shell of the super-radiation light-emitting diode is in short circuit, open circuit or non-good contact fault, different display states are displayed, so that the state detection of the tube shell and the pin of the super-radiation light-emitting diode is realized.
Drawings
FIG. 1 is a schematic view of a conventional super-luminescent diode
FIG. 2 is a schematic illustration of the utility model in an embodiment;
FIG. 3 is a diagram showing a first signal when the output signal processing unit is an oscilloscope;
FIG. 4 is a diagram showing a second signal when the output signal processing unit is an oscilloscope;
FIG. 5 is a diagram showing a third signal when the output signal processing unit is an oscilloscope;
FIG. 6 is a diagram showing a fourth signal when the output signal processing unit is an oscilloscope.
In the figure: 1. signal source, 2, differential amplifier circuit, 3, output signal processing unit, 5, pin, 6, case, 7, insulating layer, 8, detection signal, 9, case signal, 10, output signal of differential amplifier circuit.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic views illustrating only the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.
As shown in fig. 2, the device for detecting the state of the package of the super-radiation semiconductor diode comprises a signal source 1, a differential amplifier circuit 2, a first connection terminal J1, a second connection terminal J2 and an output signal processing unit 3.
The signal source 2 is configured to generate a detection signal. In one embodiment, the detection signal output by the signal source 1 is a sinusoidal signal with adjustable frequency or a square wave signal with adjustable frequency and pulse width. The signal output end of the signal source 1 is electrically connected with the first connection end J1 and the positive input end of the differential amplification circuit 2, the negative input end of the differential amplification circuit 2 is electrically connected with the second connection end J2, and the signal output end of the differential amplification circuit 2, the signal output end of the signal source 1 and the second connection end J2 are electrically connected with the output signal processing unit 3.
In actual use, the pin 5 is electrically connected to the first connection terminal J1, the package 6 is electrically connected to the second connection terminal J2, or the pin 5 is electrically connected to the first connection terminal J2, and the package 6 is electrically connected to the second connection terminal J1.
When the output signal processing unit 3 is an oscilloscope, the oscilloscope displays signals of the signal output terminal of the differential amplifying circuit 2, the signal output terminal of the signal source 1 and the second connection terminal J2. Taking the example that the pin 5 is electrically connected to the first connection terminal J1, and the tube case 6 is electrically connected to the second connection terminal J2, when the signal source 1 outputs a detection signal, if the pin 5 and the tube case 6 are in an open circuit state, the output signal 10 of the differential amplification circuit is identical to the waveform of the detection signal 8 output by the signal source, the tube case signal 9 is a straight line, the peak-to-peak value of the tube case signal 9 is 0, the output signal 10 of the differential amplification circuit is identical to the peak-to-peak value of the detection signal 8, and a specific signal waveform diagram is shown in fig. 3;
if the pin 5 and the tube shell 6 are in a short circuit state, the waveform signals of the detection signal 8 and the tube shell signal 9 are the same, the peak-to-peak value of the tube shell signal 9 and the detection signal 8 is the same, the peak-to-peak value of the output signal 10 of the differential amplification circuit is 0, and a specific signal waveform diagram is shown in fig. 4;
if the pin 5 and the case 6 are in a non-good contact short circuit state and show a short circuit fault with a large resistance characteristic, the peak-to-peak value of the case signal 9 is not 0 but is smaller than the peak-to-peak value of the detection signal 8, the peak-to-peak value of the output signal 10 of the differential amplification circuit is the difference between the peak-to-peak values of the detection signal 8 and the case signal 9, and the waveform is a complete sine wave, and the specific waveform diagram is shown in fig. 5; in actual use, the resistance value of a fault part can be calculated according to the configuration of the differential amplifying circuit 3 and the peak-to-peak value of the output signal 10 of the differential amplifying circuit;
if the pin 5 and the case 6 are in a non-good contact short circuit state and present a short circuit fault with diode characteristics, the case signal 9 is not 0 and the waveform is incomplete compared with the detection signal 8, the output signal 10 of the differential amplification circuit presents a positive peak value which is the same as the detection signal 8, a negative peak value which is smaller than the detection signal 8, and the waveform is not a complete sine wave, and the specific signal waveform diagram is shown in fig. 6.
In this embodiment, the differential amplifier circuit 2 includes an operational amplifier CMP, a resistor R1, a resistor R2, a resistor R3, and a resistor R4, a positive input terminal of the differential amplifier CMP is electrically connected to one end of the resistor R1 and one end of the resistor R3, another end of the resistor R1 is electrically connected to a signal output terminal of the signal source 1, another end of the resistor R3 is electrically connected to an output terminal of the differential amplifier CMP, a negative input terminal of the differential amplifier CMP is electrically connected to one end of the resistor R2 and one end of the resistor R4, another end of the resistor R2 is electrically connected to the second connection terminal J2, and another end of the resistor R4 is grounded.
In a certain embodiment, the output signal processing unit 3 includes a controller and a display unit, the controller may be a single chip, a signal receiving terminal of the controller is electrically connected to the signal output terminal of the differential amplifier circuit 2, the signal output terminal of the signal source 1 and the second connection terminal J1, respectively, and detects voltage values of signals of the signal output terminal of the differential amplifier circuit 2, the signal output terminal of the signal source 1 and the second connection terminal J1, and the controller determines a connection state of the pin 5 of the superluminescent diode and the tube housing 6 by detecting peak values, positive peak values and negative peak values of signals of the signal output terminal of the differential amplifier circuit 2, the signal output terminal of the signal source 1 and the second connection terminal J1.
The controller is electrically connected with the display unit, and the controller displays the connection state of the pin 5 of the super-radiation light-emitting diode and the tube shell 6 through the display unit. Specifically, the display unit may be four indicator lamps, and the four indicator lamps are respectively used for displaying an open circuit state of the pin 5 of the superluminescent diode and the tube shell 6, a short circuit state of the pin 5 of the superluminescent diode and the tube shell 6, a non-good contact short circuit state of the pin 5 of the superluminescent diode and the tube shell 6, and a short circuit fault represented by a large resistance characteristic, and a non-good contact short circuit state of the pin 5 of the superluminescent diode and the tube shell 6, and a short circuit fault represented by a diode characteristic, and when the pin 5 of the superluminescent diode and the tube shell 6 are detected to belong to the connection state, the corresponding indicator lamps are turned on. In one embodiment, the display unit is a display screen, and the controller displays the connection state of the pin 5 of the superluminescent light emitting diode and the tube shell 6 on the display screen in a text display mode.
In summary, in the present invention, the signal output terminal of the signal source 1 is electrically connected to the forward input terminal of the differential amplifier CMP and the first connection terminal J1, i.e. the pin 5 of the superluminescent diode, respectively, and the second connection terminal J2 is electrically connected to the package 6 of the superluminescent diode, and then the output signal processing unit 4 is used to analyze and display the signals of the signal output terminal of the differential amplifying circuit 2, the signal output terminal of the signal source 1, and the second connection terminal J2, so that the package 6 of the superluminescent diode shows different display states when short circuit, open circuit, or non-good contact fault occurs, thereby realizing state detection of the package 6 and the pin 5 of the superluminescent diode.
In light of the above, it is clear that many changes and modifications can be made by the workers in the field without departing from the spirit and scope of the utility model. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (6)
1. A shell-and-tube state detection device of a super-radiation semiconductor diode is characterized by comprising a signal source, a differential amplification circuit, a first connecting end, a second connecting end and an output signal processing unit, wherein the signal source is configured to generate a detection signal, a signal output end of the signal source is electrically connected with the first connecting end and a positive input end of the differential amplification circuit respectively, a negative input end of the differential amplification circuit is electrically connected with the second connecting end, and a signal output end of the differential amplification circuit, a signal output end of the signal source and the second connecting end are electrically connected with the output signal processing unit respectively.
2. The device for detecting the state of a package of a super-radiation semiconductor diode as recited in claim 1, wherein the output signal processing unit is an oscilloscope, and the oscilloscope displays signals at the signal output terminal of the differential amplifying circuit, the signal output terminal of the signal source and the second connection terminal.
3. The device for detecting the state of a package of a super-radiation semiconductor diode as claimed in claim 1, wherein the detection signal outputted by the signal source is a sinusoidal signal with adjustable frequency or a square wave signal with adjustable frequency and pulse width.
4. The device for detecting the state of a package of a super-radiation semiconductor diode as claimed in claim 1, wherein the differential amplifier circuit comprises an operational amplifier CMP, a resistor R1, a resistor R2, a resistor R3 and a resistor R4, positive input terminals of the differential amplifier CMP are electrically connected to one end of the resistor R1 and one end of the resistor R3, respectively, the other end of the resistor R1 is electrically connected to a signal output terminal of a signal source, the other end of the resistor R3 is electrically connected to an output terminal of the differential amplifier CMP, input terminals of the differential amplifier CMP are electrically connected to one end of the resistor R2 and one end of the resistor R4, respectively, the other end of the resistor R2 is electrically connected to the second connection terminal, and the other end of the resistor R4 is grounded.
5. The device for detecting the state of a package of a super-radiation semiconductor diode as claimed in claim 1, wherein the output signal processing unit comprises a controller and a display unit, a signal receiving terminal of the controller is electrically connected with the signal output terminal of the differential amplifying circuit, the signal output terminal of the signal source and the second connecting terminal respectively, and the controller is electrically connected with the display unit.
6. The device for detecting the state of a package of a super-radiation semiconductor diode as claimed in claim 5, wherein the display unit is a display screen or a plurality of indicator lights, and the controller displays the detection information through the display screen or drives the indicator lights to illuminate to display the detection information.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121965680.2U CN215728722U (en) | 2021-08-20 | 2021-08-20 | Shell state detection device of super-radiation semiconductor diode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121965680.2U CN215728722U (en) | 2021-08-20 | 2021-08-20 | Shell state detection device of super-radiation semiconductor diode |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215728722U true CN215728722U (en) | 2022-02-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121965680.2U Active CN215728722U (en) | 2021-08-20 | 2021-08-20 | Shell state detection device of super-radiation semiconductor diode |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215728722U (en) |
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2021
- 2021-08-20 CN CN202121965680.2U patent/CN215728722U/en active Active
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