CN211296166U - Temperature protection circuit for radio frequency carbon dioxide laser - Google Patents
Temperature protection circuit for radio frequency carbon dioxide laser Download PDFInfo
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- CN211296166U CN211296166U CN201922411809.4U CN201922411809U CN211296166U CN 211296166 U CN211296166 U CN 211296166U CN 201922411809 U CN201922411809 U CN 201922411809U CN 211296166 U CN211296166 U CN 211296166U
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- radio frequency
- control switch
- temperature control
- photoelectric coupler
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Abstract
The utility model discloses a temperature protection circuit for radio frequency carbon dioxide laser instrument, its characterized in that: the temperature protection circuit comprises a temperature control switch (RT 1), wherein the heating surface of the temperature control switch (RT 1) is attached to a radio frequency power supply shell of a laser resonant cavity, one end of the temperature control switch (RT 1) is connected with a pin 5 of a photoelectric coupler (U5) through a line, and the other end of the temperature control switch is grounded through the line, so that when the temperature control switch (RT 1) is closed, the pin 5 of the photoelectric coupler (U5) can be grounded through the temperature control switch (RT 1). The utility model discloses a connect temperature control switch at optoelectronic coupler's earthing terminal, the operating condition of optoelectronic coupler is controlled with the disconnection to the closure through temperature control switch, and this temperature protection circuit can prevent effectively to prolong the life of laser instrument because of the high damage to the laser instrument of temperature, so suitable using widely.
Description
Technical Field
The utility model belongs to the technical field of radio frequency carbon dioxide laser technique and specifically relates to a temperature protection circuit for radio frequency carbon dioxide laser ware.
Background
In the operation process of the radio frequency carbon dioxide laser, the temperature of the laser resonant cavity can be continuously increased, the increase of the temperature can not only reduce the laser output efficiency, but also damage some electronic components and influence the service life of the laser. In the prior art, the working temperature of the laser is usually reduced by means of air cooling or water cooling, but this method still cannot ensure that the laser always operates at the ideal working temperature, and especially when the continuous working time of the laser is long, the service life of the laser is affected.
SUMMERY OF THE UTILITY MODEL
The utility model aims at the problem that prior art exists, provide a temperature protection circuit for radio frequency carbon dioxide laser instrument, this temperature protection circuit can realize the excess temperature protection to the circuit that radio frequency carbon dioxide laser instrument provided the radio frequency control signal input.
The utility model aims at solving through the following technical scheme:
a temperature protection circuit for a radio frequency carbon dioxide laser is characterized in that: the temperature protection circuit comprises a temperature control switch, wherein a heating surface of the temperature control switch is attached to a radio frequency power supply shell of the laser resonant cavity, one end of the temperature control switch is connected with a pin 5 of the photoelectric coupler through a circuit, and the other end of the temperature control switch is grounded through the circuit, so that when the temperature control switch is closed, the pin 5 of the photoelectric coupler can be grounded through the temperature control switch.
The temperature control switch is a normally closed temperature control switch.
A pin 2 of the photoelectric coupler is connected with one end of the first resistor through a circuit, and a pin 6 of the photoelectric coupler is connected with the base electrode of the triode through a circuit; radio frequency control signals of the radio frequency carbon dioxide laser are input into the photoelectric coupler through the first resistor via the 2 pins and output to the triode via the 6 pins of the photoelectric coupler, and are transmitted to the radio frequency amplification circuit module through the triode, the radio frequency amplification circuit module outputs radio frequency signals to the laser resonant cavity of the radio frequency carbon dioxide laser when working normally, laser working gas in the laser resonant cavity is excited to generate laser, and the photoelectric coupler stops working when the temperature control switch is switched off.
The base electrode of the triode is connected with a power supply through a fourth resistor, the emitting electrode of the triode is grounded, and the collecting electrode of the triode is also connected with the power supply through a third resistor.
The other end of the first resistor is connected in series with one end of the second resistor through a line, the other end of the second resistor is connected with one end of the first capacitor through a line, and the other end of the first capacitor is grounded and is connected with the 3 pins of the photoelectric coupler through a line.
And the pin 6 of the photoelectric coupler is grounded through a second capacitor.
And the connection point of the second capacitor and the 6 pin of the photoelectric coupler is positioned on a circuit between the 6 pin of the photoelectric coupler and the base electrode of the triode.
And 8 pins of the photoelectric coupler are connected with a power supply.
Compared with the prior art, the utility model has the following advantages:
the utility model discloses a connect the temperature control switch at the earthing terminal of optoelectronic coupler, control the operating condition of optoelectronic coupler through the closure and the disconnection of temperature control switch, when the temperature was too high, the automatic disconnection of temperature control switch can make optoelectronic coupler stop work in time, makes it can not transmit the radio frequency control signal to make the laser also pause work, the protection laser; after the temperature returns to normal, the temperature control switch is automatically closed to automatically start the photoelectric coupler, so that the photoelectric coupler can normally transmit radio frequency control signals, the laser continues to normally work, the temperature protection circuit can prevent the laser from being damaged due to overhigh temperature, the service life of the laser is effectively prolonged, and the laser is suitable for popularization and use.
Drawings
Fig. 1 is a schematic diagram of the temperature protection circuit of the present invention.
Wherein: RT1 — temperature control switch; u5-photocoupler; r1 — first resistance; r2 — second resistance; r3 — third resistor; r4 — fourth resistor; q1-triode; c1 — first capacitance; c2 — second capacitance.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and examples.
As shown in fig. 1: a temperature protection circuit for a radio frequency carbon dioxide laser comprises a temperature control switch RT1, wherein a heating surface of a normally closed temperature control switch RT1 is attached to a radio frequency power supply shell of a laser resonant cavity, one end of the temperature control switch RT1 is connected with a pin 5 of a photoelectric coupler U5 through a circuit, the other end of the temperature control switch RT1 is grounded through a circuit, when the temperature control switch RT1 is closed, the pin 5 of the photoelectric coupler U5 can be grounded through the temperature control switch RT1, and a pin 8 of the photoelectric coupler U5 is connected with a power supply to supply power to the photoelectric coupler U5. A pin 2 of the photoelectric coupler U5 is connected with one end of a first resistor R1 through a line, and a pin 6 of the photoelectric coupler U5 is connected with the base electrode of the triode Q1 through a line; the radio frequency control signal of the radio frequency carbon dioxide laser is input into a photoelectric coupler U5 through a 2 pin of a first resistor R1, is output to a triode Q1 through a 6 pin of a photoelectric coupler U5, and is transmitted to a radio frequency amplification circuit module through the triode Q1, the radio frequency amplification circuit module outputs a radio frequency signal to a laser resonant cavity of the radio frequency carbon dioxide laser when working normally, laser working gas in the laser resonant cavity is excited to generate laser, and the photoelectric coupler U5 stops working when a temperature control switch RT1 is disconnected.
In addition to the above circuit, the base of the transistor Q1 is connected to the power supply through the fourth resistor R4, the emitter of the transistor Q1 is grounded, and the collector of the transistor Q1 is also connected to the power supply through the third resistor R3. The other end of the first resistor R1 is connected in series with one end of the second resistor R2 through a line, the other end of the second resistor R2 is connected with one end of a first capacitor C1 through a line, and the other end of the first capacitor C1 is grounded and is connected with a pin 3 of a photoelectric coupler U5 through a line; the pin 6 of the photocoupler U5 is grounded through a second capacitor C2, and the connection point of the second capacitor C2 and the pin 6 of the photocoupler U5 is located on a line between the pin 6 of the photocoupler U5 and the base of the triode Q1.
It should be further noted that the photocoupler U5 needs to supply power as a component, and the pin 8 of the photocoupler U5 is its power supply pin, and 5V voltage is added. Meanwhile, the voltage of 5V is added to the base electrode of the triode Q1 through a fourth resistor R4, and the voltage is the base electrode voltage of the triode Q1; the emitter of the transistor Q1 outputs a signal, and 5V voltage is added to the collector of the transistor Q1 through a third resistor R3, so that the pushing capacity of signal output is enhanced; since 5V is required in these places, the 5V is connected to the transistor Q1 through the fourth resistor R4 and the third resistor R3, respectively.
The utility model discloses a temperature protection circuit includes optoelectronic coupler U5 and temperature control switch RT 1. The radio frequency control signal is input into the photoelectric coupler U5 through the 2-pin through the first resistor R1, the radio frequency control signal is output to the triode Q1 through the 6-pin of the photoelectric coupler U5 under normal conditions, the radio frequency control signal is transmitted to the radio frequency amplification circuit module through the triode Q1, the radio frequency amplification circuit module outputs the radio frequency signal to a laser resonant cavity of the radio frequency carbon dioxide laser when the radio frequency amplification circuit module works normally, and laser working gas in the resonant cavity is excited to generate laser. The temperature control switch RT1 is attached to a radio frequency power supply shell of the laser resonant cavity and can receive temperature signals in the laser resonant cavity, when the temperature is lower than a certain set value (such as 50 ℃ or 55 ℃), the temperature control switch RT1 is closed, and when the temperature is higher than or equal to the certain set value (such as 50 ℃ or 55 ℃), the temperature control switch RT1 is opened. A pin 5 of the photoelectric coupler U5 is grounded after passing through a temperature control switch RT1, a pin 5 of the photoelectric coupler U5 is grounded when the temperature control switch RT1 is closed, and the photoelectric coupler U5 works normally, i.e. a radio frequency input signal received by a pin 2 of the photoelectric coupler U5 can be output through a pin 6; on the contrary, when the temperature control switch RT1 is turned off, the ground terminal of the photoelectric coupler U5 is turned off, the photoelectric coupler U5 stops working, at this time, the pin 6 of the photoelectric coupler U5 cannot output a radio frequency control signal, the radio frequency amplification circuit module cannot work normally, the working gas in the laser resonant cavity cannot generate laser, and at this time, the laser stops working. When the temperature is lower than or equal to the set value (such as 50 ℃ or 55 ℃), the temperature control switch RT1 is closed again, the pin 5 of the photoelectric coupler U5 is grounded again, the photoelectric coupler U5 recovers normal operation, namely, a radio frequency input signal received by the pin 2 can be transmitted to the radio frequency amplification circuit module through the pin 6 of the photoelectric coupler U5 and the triode Q1, the radio frequency amplification circuit module outputs a radio frequency signal to the laser resonant cavity when working normally, and the laser recovers normal operation.
The utility model discloses a connect temperature control switch RT1 at photoelectric coupler U5's earthing terminal, the operating condition of photoelectric coupler U5 is controlled through the closure and the disconnection of temperature control switch RT1, and when the temperature was too high, temperature control switch RT1 automatic disconnection can make photoelectric coupler U5 stop working in time, makes it can not transmit radio frequency control signal to make the laser also pause work, the protection laser; after the temperature returns to normal, temperature control switch RT1 self-closing can the automatic start optoelectronic coupler U5, makes it normally transmit radio frequency control signal to make the laser instrument continue normal work, this temperature protection circuit can prevent because of the high damage to the laser instrument of temperature, effectively prolongs the life of laser instrument, so the suitable using widely.
The above embodiments are only for explaining the technical idea of the present invention, and the protection scope of the present invention cannot be limited thereby, and any modification made on the basis of the technical scheme according to the technical idea provided by the present invention all fall within the protection scope of the present invention; the technology not related to the utility model can be realized by the prior art.
Claims (8)
1. A temperature protection circuit for a radio frequency carbon dioxide laser is characterized in that: the temperature protection circuit comprises a temperature control switch (RT 1), wherein the heating surface of the temperature control switch (RT 1) is attached to a radio frequency power supply shell of a laser resonant cavity, one end of the temperature control switch (RT 1) is connected with a pin 5 of a photoelectric coupler (U5) through a line, and the other end of the temperature control switch is grounded through the line, so that when the temperature control switch (RT 1) is closed, the pin 5 of the photoelectric coupler (U5) can be grounded through the temperature control switch (RT 1).
2. The temperature protection circuit for a radio frequency carbon dioxide laser according to claim 1, wherein: the temperature control switch (RT 1) is a normally closed temperature control switch.
3. The temperature protection circuit for a radio frequency carbon dioxide laser according to claim 1, wherein: a pin 2 of the photoelectric coupler (U5) is connected with one end of a first resistor (R1) through a line, and a pin 6 of the photoelectric coupler (U5) is connected with a base electrode of the triode (Q1) through a line; radio frequency control signals of the radio frequency carbon dioxide laser are input into the photoelectric coupler (U5) through the 2 pins through the first resistor (R1), are output to the triode (Q1) through the 6 pins of the photoelectric coupler (U5), and are transmitted to the radio frequency amplification circuit module through the triode (Q1), when the radio frequency amplification circuit module normally works, radio frequency signals are output to a laser resonant cavity of the radio frequency carbon dioxide laser, laser working gas in the laser resonant cavity is excited to generate laser, and when the temperature control switch (RT 1) is disconnected, the photoelectric coupler (U5) stops working.
4. The temperature protection circuit for a radio frequency carbon dioxide laser according to claim 3, wherein: the base electrode of the triode (Q1) is connected with a power supply through a fourth resistor (R4), the emitter electrode of the triode (Q1) is grounded, and the collector electrode of the triode (Q1) is also connected with the power supply through a third resistor (R3).
5. The temperature protection circuit for a radio frequency carbon dioxide laser according to claim 3, wherein: the other end of the first resistor (R1) is connected with one end of the second resistor (R2) in series through a line, the other end of the second resistor (R2) is connected with one end of the first capacitor (C1) through a line, and the other end of the first capacitor (C1) is grounded and is connected with the pin 3 of the photoelectric coupler (U5) through a line.
6. The temperature protection circuit for a radio frequency carbon dioxide laser according to claim 1 or 3, wherein: the pin 6 of the photoelectric coupler (U5) is grounded through a second capacitor (C2).
7. The temperature protection circuit for a radio frequency carbon dioxide laser as claimed in claim 6, wherein: and the connection point of the second capacitor (C2) and the 6 pin of the photoelectric coupler (U5) is positioned on a line between the 6 pin of the photoelectric coupler (U5) and the base electrode of the triode (Q1).
8. The temperature protection circuit for a radio frequency carbon dioxide laser according to claim 1, wherein: and the pin 8 of the photoelectric coupler (U5) is connected with a power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922411809.4U CN211296166U (en) | 2019-12-28 | 2019-12-28 | Temperature protection circuit for radio frequency carbon dioxide laser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922411809.4U CN211296166U (en) | 2019-12-28 | 2019-12-28 | Temperature protection circuit for radio frequency carbon dioxide laser |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211296166U true CN211296166U (en) | 2020-08-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922411809.4U Active CN211296166U (en) | 2019-12-28 | 2019-12-28 | Temperature protection circuit for radio frequency carbon dioxide laser |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211296166U (en) |
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2019
- 2019-12-28 CN CN201922411809.4U patent/CN211296166U/en active Active
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