Method for correcting and maintaining temperature of discharge lamp

Abstract

The invention discloses a method for correcting and maintaining the temperature of a discharge lamp, and belongs to the technical field of temperature correction of discharge lamps, and the method comprises the following steps: measuring a plurality of groups of vertical measurement temperature values # imgabs 1 # and inclined measurement temperature values # imgabs 2 # of the discharge lamp under the condition that the inclination angle is # imgabs 0 #; fitting a plurality of groups of measured vertical measurement temperature values # imgabs3 # and inclined measurement temperature values # imgabs4 # to obtain a relational expression; the actual inclination measurement temperature # imgabs5 # is measured, and the actual temperature value # imgabs6 # is calculated through the relational expression; and according to the difference value between the actual temperature value # imgabs7 # and the target temperature value # imgabs8 #, a cooling assembly is adjusted to enable the temperature of the discharge lamp to be kept at the target temperature value # imgabs9 #. According to the method for correcting and maintaining the temperature of the discharge lamp, the temperature of the discharge lamp can be effectively monitored and corrected in real time, the cooling intensity of the cooling assembly is dynamically adjusted through the adjusting assembly according to the difference value between the actual temperature value and the target temperature value, and the method is convenient and easy to implement.

Description

Technical Field

[0001] The present invention relates to the field of discharge lamp temperature correction, and particularly to a method for discharge lamp temperature correction and maintenance. Background Art

[0002] A laser-driven gas discharge lamp is a light source that uses a laser to maintain gas plasma luminescence. It is usually equipped with a dedicated lamp chamber system. The laser beam is diverged and then irradiated on a reflector bowl. After reflection, it is focused on the center of the discharge lamp, causing the gas in the discharge lamp to ionize to form a plasma and emit light. The plasma continuously emits light with a continuous spectrum, and the temperature of the discharge lamp increases. If the temperature exceeds the tolerance limit of the discharge lamp bulb, it will cause the discharge lamp to rupture. Therefore, it is necessary to monitor the temperature of the discharge lamp in real time and cool it to keep the temperature of the discharge lamp near the target temperature.

[0003] Usually, the temperature measured vertically for the discharge lamp is regarded as the true temperature. However, when the discharge lamp is actually working, since the laser is reflected from above into the reflector bowl, and then vertical measurement will affect the normal operation of the discharge lamp. Therefore, an infrared temperature sensor is placed at the upper edge of the reflector bowl for inclined measurement. However, there is a certain error between the temperature obtained by inclined measurement and the true temperature, and correction is required. Summary of the Invention

[0004] The present invention aims to provide a method for discharge lamp temperature correction and maintenance to control the true temperature value of the discharge lamp near the target temperature value.

[0005] To achieve the above object, the technical solution of the present invention is as follows: S1. Under the condition that the inclination angle is , multiple groups of vertical measurement temperature values and inclined measurement temperature values of the discharge lamp are measured; S2. The multiple groups of measured vertical measurement temperature values and inclined measurement temperature values are fitted to obtain a fitting formula ; S3. The actual inclined measurement temperature is measured, and the actual temperature value is calculated through the fitting formula; S4. According to the difference between the actual temperature value and the target temperature value , the cooling of the discharge lamp is adjusted to keep the temperature of the discharge lamp at the target temperature value ; S5. When the difference between the actual temperature value and the target temperature value is greater than 0, S3 - S4 are repeated.

[0006] In a preferred embodiment of the present invention, in the step S1, the discharge lamp is arranged in the vertical direction, the first sensor is perpendicular to the discharge lamp, and the vertical measurement temperature value is measured. ; The second sensor is arranged above the first sensor at an inclined angle , and the inclined measurement temperature value is measured. .

[0007] In a preferred embodiment of the present invention, the first sensor and the second sensor are infrared temperature sensors, and the detection wavelength is 8 - 14 μm.

[0008] In a preferred embodiment of the present invention, in the step S3, the discharge lamp is installed in the reflector bowl, the first sensor is removed, and the second sensor is arranged at the upper edge of the mouth of the reflector bowl at an inclined angle , and the actual inclined measurement temperature value is measured. .

[0009] In a preferred embodiment of the present invention, in the step S4, a cooling component is installed on the discharge lamp, the cooling component is connected to the adjustment component, and the cooling capacity of the cooling component is adjusted by controlling the adjustment component.

[0010] In a preferred embodiment of the present invention, in the step S4, the cooling component is an air cooling device, which is installed at the anode end of the discharge lamp, and the air cooling device conveys cooling gas to the cooling component.

[0011] In a preferred embodiment of the present invention, the cooling gas is compressed air or nitrogen, and the supply pressure ≥ 0.8 MPa.

[0012] A method for temperature correction and maintenance of a discharge lamp proposed by the present invention can effectively monitor and correct the temperature of the discharge lamp in real time, and dynamically adjust the cooling intensity of the cooling component through the adjustment component according to the difference between the actual temperature value and the target temperature value. The method is convenient and easy to implement.

[0013] To make the above features and advantages of the invention more obvious and understandable, specific embodiments are given below and detailed descriptions are made in conjunction with the accompanying drawings as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic structural diagram of an embodiment of the optical device of the present invention.

[0015] Figure 2 It is a schematic diagram of the temperature detection of the present invention.

[0016] Figure 3 It is a flowchart of the temperature correction and maintenance of the present invention.

[0017] Figure 4It is a relationship diagram of the inclined measurement temperature value and the vertical measurement temperature value when the inclination angle is 55°.

[0018] Figure 5 It is a relationship diagram of the inclined measurement temperature value and the vertical measurement temperature value when the inclination angle is 75°.

[0019] Figure 6 It is a broken line diagram of the temperature correction coefficient at different inclination angles.

[0020] 1 - Optical device; 11 - Lamp chamber system; 111 - Optical path component; 112 - Reflector bowl; 12 - Discharge lamp; 13 - Cooling component; 14 - Adjusting component; 2 - Temperature sensor; 21 - First sensor; 22 - Second sensor; - Vertical measurement temperature value; - Inclined measurement temperature value; - Inclination angle; - Real-time inclined measurement temperature value; - Actual temperature value; - Target temperature value.

[0021] In the drawings, like reference numerals refer to the same elements of the drawings. Detailed implementation manners

[0022] To make the objectives and technical solutions of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the drawings of the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention.

[0023] In the present invention, for clear description, the following explanations are made: The observer faces the attached Figure 1 for observation. The upper end of the discharge lamp is the "anode end", and the lower end is the "cathode end". For the convenience of description, the up, down, left, and right directions in the specification respectively correspond to the up, down, left, and right directions when the observer faces the attached Figure 1 for observation. The above explanations are only for clearly describing the present invention, rather than indicating or implying that the structures or components referred to must have a specific orientation or be constructed in a specific orientation. Therefore, it cannot be understood as a limitation of the present invention.

[0024] Such as Figure 1As shown in the figure, the optical device 1 includes a lamp chamber system 11, a discharge lamp 12, a cooling component 13, and an adjustment component 14. The discharge lamp 12 is installed vertically in the lamp chamber system 11. The cooling component 13 is installed on the discharge lamp 12 to cool the discharge lamp 12. The adjustment component 14 is located outside the lamp chamber system 11. The adjustment component 14 is connected to the cooling component 13 to control the cooling capacity of the cooling component 13. The lamp chamber system 11 emits a laser beam, which after reflection and focusing, causes the discharge lamp 12 to emit light. The light emitted by the discharge lamp 12 is output after reflection again.

[0025] Specifically, the upper end of the discharge lamp 12 is the anode end, and the lower end is the cathode end.

[0026] In this embodiment, the cooling component 13 is installed at the anode end of the gas discharge lamp 12 to cool the anode of the discharge lamp 13. The cooling component 13 can be an air-cooling device, such as a cold air nozzle, used to deliver cooling gas to the discharge lamp 12. The cooling gas is compressed air or nitrogen, and the supply pressure ≥ 0.8 MPa. Correspondingly, the adjustment component 14 is used to adjust the pressure of the cooling gas output by the cooling component 13. It can be a pressure regulating valve, connected to the cooling component 13 through a pipeline. In some other embodiments, the cooling component 13 can also be other devices that can be used to cool the discharge lamp 12, not limited to the air-cooling device described in this embodiment. The installation position is not limited to the anode end of the discharge lamp 12. The corresponding adjustment component 14 can be a supporting device that can adjust the cooling capacity.

[0027] The lamp chamber system 11 includes an optical path component 111 and a reflector bowl 112. The optical path component 111 is located above the reflector bowl 112. The laser passes through the optical path component 111 and the reflector bowl 112, and after reflection and focusing, causes the discharge lamp 12 to emit light. The discharge lamp 12 is installed vertically in the reflector bowl 112.

[0028] Set the target temperature value according to the performance of the discharge lamp 12 , the temperature of the discharge lamp 12 will not be in danger of rupture when it is near the target temperature value When the temperature sensor 2 measures the temperature of the discharge lamp 12, an infrared temperature sensor is selected, preferably a single-color sensor. The single-color sensor has the advantages of low price and small volume, which is convenient for integration. The detection wavelength of the infrared temperature sensor 2 is preferably 8 - 14 μm. Measuring in a band far from the laser wavelength and the light wavelength emitted by the discharge lamp 12 can effectively reduce the interference of ambient light signals on the measurement.

[0029] Such as Figure 2As shown, the temperature sensor 2 includes a first sensor 21 and a second sensor 22. The first sensor 21 is perpendicular to the length direction of the discharge lamp 12 and vertically measures the temperature of the discharge lamp 12. Let the vertically measured temperature value be , the vertically measured temperature value is the true temperature of the discharge lamp 12; the second sensor 22 is arranged at the upper edge of the reflecting bowl 112 and measures the discharge lamp 12 at a certain inclination angle. The temperature value obtained by the inclined measurement at the measurement angle. Let the inclination angle of the infrared temperature sensor 2 be , and let the inclined measurement temperature value be .

[0030] Since when the discharge lamp 12 is working, the first sensor 21 will be blocked by the reflecting bowl 112. If it is arranged in the reflecting bowl 112, it will affect the optical path in the reflecting bowl 112. Therefore, the true temperature cannot be directly measured, and there is a certain error between the inclined measurement temperature value and the vertically measured temperature value . Therefore, it is necessary to correct the actual inclined measurement temperature value to obtain the actual temperature value , and adjust the cooling capacity of the cooling component 13 through the actual temperature value obtained after correction to keep the temperature of the discharge lamp 12 near the target temperature value .

[0031] Please refer to Figure 2 and Figure 3 , a method for correcting and maintaining the temperature of a discharge lamp includes the following steps: S1. Set the discharge lamp 12 in the vertical direction, and the first sensor 21 is perpendicular to the discharge lamp 12, that is, the first sensor 21 is horizontally arranged to measure the vertically measured temperature value . Set the inclination angle as , and set the second sensor 22 above the first sensor 21 at the inclination angle to measure the inclined measurement temperature value . Use a hot air gun to heat the discharge lamp 12 to change the temperature, and measure multiple sets of vertically measured temperature values and inclined measurement temperature values data.

[0032] S2. Fit the obtained multiple sets of vertically measured temperature values and inclined measurement temperature values to obtain the fitting formula Equation (1). In Equation (1), is the correction coefficient, is a constant.

[0033] S3. Remove the first sensor 21, install the discharge lamp 12 in the reflector bowl 112 for normal operation, and the second sensor 22 is set at an inclined angle at the upper edge of the reflector bowl 112 to measure the actual inclined measurement temperature value , and bring the actual inclined measurement temperature value into the above formula (1), , and calculate the actual temperature value .

[0034] S4. According to the difference between the actual temperature value and the target temperature value , the adjustment component 14 adjusts the cooling capacity of the cooling component 13 to keep the temperature of the discharge lamp 12 near the target temperature value .

[0035] S5. When the difference between the actual temperature value and the target temperature value is greater than 0, loop S3 - S4 to keep the temperature of the discharge lamp 12 near the target temperature value during the operation.

[0036] In S1, since the installation position of the first sensor 21 is not applicable when the discharge lamp 12 is operating normally, in order to obtain formula (1), a hot air gun is used to change the temperature of the discharge lamp 12 under abnormal use conditions. When the discharge lamp 12 is operating normally, that is, in S3, when the discharge lamp 12 is installed in the reflector bowl 112, the first sensor 21 will be blocked by the reflector bowl 112, so the first sensor 21 is removed.

[0037] In S4, a PID algorithm can be used to control the adjustment component 14, or other empirical methods can also be used. The cooling capacity of the cooling component 13 can be the cold air flow, cold air temperature, etc. according to different selected devices.

[0038] Please combine Figure 4 , Figure 5 and Figure 6 . In actual detection operations, the common values of the inclination angle are 55° and 75°. As shown in Figure 4 , Figure 4 is the relationship diagram between the inclination measurement temperature value , the vertical measurement temperature value and the vertical measurement temperature value when the inclination angle is . At this time, the correction coefficient . As shown in Figure 5 ,Figure 5 When the tilt angle , the tilt-measured temperature value and the vertically measured temperature value relationship diagram, at this time the correction coefficient , constant . As Figure 6 shown Figure 6 is the tilt angle temperature correction coefficient line graph at different angles. It can be seen from Figure 6 that when the tilt angle , ; tilt angle , . When the tilt angle further increases, the temperature correction coefficient continues to increase.

[0039] For the present invention, a method for temperature correction and maintenance of a discharge lamp proposed by the present invention can effectively monitor and correct the temperature of the discharge lamp in real time, and according to the difference between the actual temperature value and the target temperature value, dynamically adjust the cooling capacity of the cooling component through the adjustment component. The method is convenient and easy to implement.

[0040] Although the present invention has been disclosed above with embodiments, it is not intended to limit the present invention. Any person with ordinary knowledge in the technical field to which the present invention pertains can make some modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be subject to that defined by the appended patent application scope.

Claims

1. A method for correcting and maintaining the temperature of a discharge lamp, characterized in that: The following steps are involved: S1, at an inclination angle of Under the condition of and tilt measurement temperature values ; S2. Measure multiple groups of vertical temperature values and tilt measurement temperature values Perform fitting and obtain the fitting formula ; S3. Measure the actual tilt measurement temperature value , the actual temperature value is calculated by the fitting formula ; S4, according to the actual temperature value and target temperature value The difference between the discharge lamp and the target temperature is adjusted to cool the discharge lamp. ; S5, when the actual temperature value and target temperature value When the difference is greater than 0, repeat S3-S4.

2. A method for correcting and maintaining the temperature of a discharge lamp as claimed in claim 1, characterized in that: In S1, the discharge lamp is arranged in a vertical direction, the first sensor is perpendicular to the discharge lamp, and the vertical temperature value is measured. ; The second sensor is tilted at an angle Set above the first sensor, measure the tilt measurement temperature value .

3. A method for correcting and maintaining the temperature of a discharge lamp as claimed in claim 2, characterized in that: The first sensor and the second sensor are infrared temperature sensors with a detection wavelength of 8-14 μm.

4. A method for correcting and maintaining the temperature of a discharge lamp as claimed in claim 2, characterized in that: In S3, the discharge lamp is installed in a reflective bowl, the first sensor is removed, and the second sensor is tilted at an angle Set at the upper edge of the reflective bowl to measure the actual tilt measurement temperature value .

5. A method for correcting and maintaining the temperature of a discharge lamp as claimed in claim 1, characterized in that: In S4, a cooling component is installed on the discharge lamp, and the cooling component is connected to an adjusting component, and the cooling capacity of the cooling component is adjusted by controlling the adjusting component.

6. A method for correcting and maintaining the temperature of a discharge lamp as claimed in claim 5, characterized in that: In S4, the cooling assembly is an air cooling device installed at the anode end of the discharge lamp, and the air cooling device delivers cooling gas to the cooling assembly.

7. A method for correcting and maintaining the temperature of a discharge lamp as claimed in claim 6, characterized in that: The cooling gas is compressed air or nitrogen, and the supply pressure is ≥0.8MPa.

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