Vertical distributed photometer

Abstract

The utility model discloses a vertical distributed photometer. The vertical distributed photometer comprises a machine body, a driving mechanism, a lamp holder mechanism and a testing mechanism, a containing cavity is formed in the machine body. The driving mechanism comprises a first shaft, a second shaft, a mounting seat, a driving assembly and an angle sampling assembly, the first shaft has a rotational degree of freedom between a first position and a second position, the second shaft and the first shaft are coaxially arranged, the second shaft has a rotational degree of freedom relative to the first shaft, and the second shaft is in transmission connection to the driving assembly; at least part of the angle sampling assembly sleeves the outer side of the second shaft, and the driving assembly and the angle sampling assembly are both connected to the mounting seat; the lamp holder mechanism comprises a lamp holder arm and a lamp holder connected to the lamp holder arm; the testing mechanism comprises a testing arm, a reflector support and a detector support. The testing arm sleeves the outer side of the second shaft of the driving mechanism. According to the invention, the light distribution performance of the tested lamp can be tested, and the accuracy of the test result is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of optics, in particular to a vertical distributed photometer. BACKGROUND

[0002] The distributed photometer is an instrument for measuring the spatial light intensity distribution and various photometric parameters of a light source or a lamp, in the prior art, during measurement, the photometric probe is centered on the light source or the measured lamp and rotates around the center at a certain distance to test the light source or the measured lamp at each angle according to the measurement angle requirements of the A, B and C three plane test systems.

[0003] The existing distributed photometer mainly includes a horizontal distributed photometer and a rotating mirror type distributed photometer, in the measurement process, the test component is driven to rotate around the measured lamp by a driving component such as a stepping motor. However, the rotation angle of the shaft cannot be accurately controlled, which affects the test accuracy of the lamp. CONTENT OF THE UTILITY MODEL

[0004] In view of the above problems, the purpose of the present application is to provide a vertical distributed photometer which can test the light distribution performance of the measured lamp and improve the accuracy of the test results.

[0005] In order to achieve the above purpose, the present application provides a vertical distributed photometer for measuring the light distribution performance of a light source, the distributed photometer comprising a body, a driving mechanism, a lamp stand mechanism and a test mechanism; a receiving cavity is formed in the body; at least part of the driving mechanism is arranged in the receiving cavity, the driving mechanism comprising a first shaft, a second shaft, a mounting seat, a driving assembly and an angle sampling assembly for acquiring the rotation angle of the second shaft, the first shaft having a rotation freedom degree between a first position and a second position, the included angle between the first position and the second position being less than or equal to 180°, the second shaft being coaxially arranged with the first shaft, the second shaft having a rotation freedom degree relative to the first shaft, the second shaft being arranged outside the first shaft, the second shaft being drivingly connected to the driving assembly, at least part of the angle sampling assembly being sleeved outside the second shaft, the driving assembly and the angle sampling assembly being connected to the mounting seat; the lamp stand mechanism comprising a lamp stand arm and a lamp stand connected to the lamp stand arm, the rotation axis of the lamp stand arm being coaxially arranged with the axis of the first shaft, the lamp stand arm being sleeved outside the first shaft of the driving mechanism; the test mechanism comprising a test arm, a reflector support connected to one end of the test arm and a detector support connected to the other end of the test arm, the rotation axis of the test arm being coaxially arranged with the axis of the second shaft, the test arm being sleeved outside the second shaft of the driving mechanism.

[0006] Further, the angle sampling assembly comprises a first gear, a second gear set and an angle sensor, the first gear is sleeved outside the second shaft, the second gear set is arranged on one side of the first gear, the second gear set is engaged to the first gear, and the angle sensor is connected to the second gear set.

[0007] Further, the second gear set comprises two second gears stacked with each other and a tension spring for attaching the second gear set to the first gear, the second gears are provided with notches, and two ends of the tension spring are connected to the notches of the two second gears respectively.

[0008] Further, the driving assembly comprises a driving motor and a speed reducer, one end of the speed reducer is drivingly connected to the driving motor, and the other end of the speed reducer is drivingly connected to the second shaft.

[0009] Further, the speed reducer is a hollow rotary speed reducer, and the hollow rotary speed reducer is drivingly connected to the second shaft through a gear sleeved outside the second shaft.

[0010] Further, the driving mechanism further comprises a limiting assembly for limiting the rotation freedom degree of the first shaft, the limiting assembly comprises a limiting piece, a clamping piece and a control rod, the clamping piece is connected to the mounting seat, the clamping piece is coaxially arranged with the limiting piece and attached to the limiting piece, the limiting piece is connected to the first shaft, and the control rod is connected to the clamping piece and used for controlling the tightness of the clamping piece.

[0011] Further, the limiting piece comprises a first limiting protruding part and a first flat part, the clamping piece comprises a second limiting protruding part and a second flat part, a corresponding central angle of the first limiting protruding part is 90°, a corresponding central angle of the second limiting protruding part is 90°, the first limiting protruding part is attached to the second flat part, and the second limiting protruding part is attached to the first flat part.

[0012] Further, the outer side of the second shaft is further provided with a conductive slip ring for signal transmission, and the conductive slip ring is coaxially arranged with the second shaft.

[0013] Further, the inner side of the second shaft is rotatably connected to the first shaft through at least two bearings, and the outer side of the second shaft is rotatably connected to the mounting seat through at least one bearing.

[0014] Further, the testing mechanism further comprises a reflector and a detector, the reflector is connected to a reflector support, the detector is connected to a detector support, and the detector comprises at least one of a near-field photometric detector or a chromaticity detector.

[0015] In summary, the vertical distributed photometer provided by the application is provided, the first shaft and the second shaft are sleeved, the measured lamp and the test mechanism can be rotated at different amplitudes, the second shaft drives the test mechanism to rotate around the measured lamp, the rotation angle of the second shaft is collected by the angle sampling assembly, the rotation amplitude of the second shaft is accurately controlled, the test mechanism is driven to rotate by the second shaft, the light distribution performance of the measured lamp is tested, and the angle information collected by the angle sampling assembly can realize accurate control of the rotation of the test mechanism around the measured lamp, and the accuracy of the light distribution performance test of the measured lamp is improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a structural schematic view of the vertical distributed photometer provided by the application;

[0017] Figure 2 is a three-dimensional schematic view of the driving mechanism in the vertical distributed photometer provided by the application;

[0018] Figure 3 is a schematic view of the lamp holder mechanism and the test mechanism in the vertical distributed photometer provided by the application;

[0019] Figure 4 is a partial enlarged view of position A in the vertical distributed photometer provided by the application; Figure 2

[0020] Figure 5 is a cross-sectional view of the limiting assembly in the vertical distributed photometer provided by the application;

[0021] Figure 6 is a partial enlarged view of position B in the vertical distributed photometer provided by the application; Figure 2

[0022] Figure 7 is a position schematic view of the driving assembly in the vertical distributed photometer provided by the application;

[0023] Figure 8 is a position schematic view of the reflector and the detector in the vertical distributed photometer provided by the application;

[0024] Figure 9 is a structural cross-sectional schematic view of the driving mechanism in the vertical distributed photometer provided by the application;

[0025] ​​In the figure: 100, vertical distributed photometer; 11, machine body; 12, driving mechanism; 121, first shaft; 122, second shaft; 1221a, first bearing; 1221b, second bearing; 1221c, third bearing; 1222, conductive slip ring; 123, mounting seat; 124, driving assembly; 1241, driving motor; 1242, speed reducer; 125, angle sampling assembly; 1251, first gear; 1252, second gear set; 1252a, second gear; 1252b, notch; 1253, angle sensor; 126, limiting assembly; 1261, limiting piece; 1261a, first limiting protrusion; 1261b, first flat part; 1262, clamping piece; 1262a, second limiting protrusion; 1262b, second flat part; 1263, control rod; 13, lamp holder mechanism; 131, lamp holder arm; 132, lamp holder; 14, test mechanism; 141, test arm; 142, mirror support; 143, probe support; 144, mirror; 145, probe. DETAILED DESCRIPTION

[0026] In order to make the personnel in the art better understand the scheme of the present application, the technical scheme in the specific embodiments of the present application will be clearly and completely described below in combination with the drawings in the embodiments of the present application.

[0027] As shown in Figure 1 The embodiment of the present application provides a vertical distributed photometer 100 for measuring the light distribution performance of a light source. The vertical distributed photometer 100 comprises a machine body 11, a driving mechanism 12, a lamp holder mechanism 13 and a test mechanism 14. Wherein, a containing cavity is formed in the machine body 11, and at least part of the driving mechanism 12 is arranged in the containing cavity formed by the machine body 11. As shown in Figure 2As shown, the driving mechanism 12 comprises a first shaft 121, a second shaft 122, a mounting base 123, a driving assembly 124 and an angle sampling assembly 125. The first shaft 121 is configured to have a rotation freedom between a first position and a second position, the angle between the first position and the second position is less than or equal to 180°, that is, the first shaft 121 is configured to rotate within a range of less than or equal to 180°. The second shaft 122 is coaxially arranged with the first shaft 121, the second shaft 122 is arranged outside the first shaft 121, and the second shaft 122 is drivingly connected to the driving assembly 124, the driving assembly 124 provides power to drive the second shaft 122 to rotate, and the second shaft 122 is configured to have a rotation freedom relative to the first shaft 121. The second shaft 122 is sleeved outside the first shaft 121, the second shaft 122 rotates relative to the first shaft 121, and the rotation range of the second shaft 122 is not limited by the rotation freedom of the first shaft 122. At least part of the angle sampling assembly is sleeved outside the second shaft 122, the angle sampling assembly 125 and the driving assembly 124 are both connected to the mounting base 123, and the angle sampling assembly 125 is used to obtain the angle information of the rotation of the second shaft 122, so as to realize the accurate control and viewing of the rotation angle of the second shaft 122. Each unit of the above-mentioned driving mechanism 12 is mounted on the mounting base 123, the driving mechanism 12 forms an integral whole, the structure is simple and compact, the modularization of the driving mechanism 12 is realized, and the installation space is saved.

[0028] As shown in Figure 3 , the lamp holder mechanism 13 comprises a lamp holder arm 131 and a lamp holder 132 connected to the lamp holder arm 131, the rotation axis of the lamp holder arm 131 is coaxially arranged with the axis of the first shaft 121 of the driving mechanism 12, and the lamp holder arm 131 is sleeved outside the first shaft 121 of the driving mechanism 12. Rotating the first shaft 121 of the driving mechanism 12, the first shaft 121 can rotate within a range of less than or equal to 180°, so that the first shaft 121 drives the lamp holder arm 131 and the lamp holder 132 to rotate.

[0029] As shown in Figure 3 , the test mechanism 14 comprises a test arm 141, a mirror support 142 and a detector support 143. The mirror support 142 and the detector support 143 are respectively arranged at both ends of the test arm 141, the mirror support 142 is used to mount a mirror, and the detector support 143 is used to mount a detection instrument. The rotation axis of the test arm 141 is coaxially arranged with the axis of the second shaft 122 of the driving mechanism 12, and the test arm 141 is sleeved outside the second shaft 122 of the driving mechanism 12. The driving mechanism 12 drives the second shaft 122, the second shaft 122 drives the test mechanism 14 to rotate around the measured lamp, and the light distribution performance of the measured lamp is measured.

[0030] According to the above description, the vertical distributed photometer 100 provided by the application can drive the measured lamp and the test mechanism 14 to rotate at different angles through the sleeving arrangement of the first shaft 121 and the second shaft 122, the second shaft 122 drives the test mechanism 14 to rotate around the measured lamp, realizes the test on the light distribution performance of the measured lamp, and collects the rotation angle of the second shaft 122 through the angle sampling assembly 125, accurately controls the rotation amplitude of the second shaft 122, and based on the rotation of the test mechanism 14 driven by the second shaft 122, the angle information collected by the angle sampling assembly 125 can be used to realize the accurate control of the rotation of the test mechanism 14 around the measured lamp, and improve the accuracy of the light distribution performance test of the measured lamp.

[0031] As an implementation manner, as shown in Figure 4 The driving mechanism 12 further comprises a limiting assembly 126, and the limiting assembly 126 is used to limit the rotation freedom degree of the first shaft 121. The limiting assembly 126 comprises a limiting piece 1261, a clamping piece 1262 and a control rod 1263, wherein the control rod 1263 is connected with the clamping piece 1262, and the control rod 1263 is used to control the tightness of the clamping piece 1262. The clamping piece 1262 is connected to the mounting seat 123, the clamping piece 1262 is hollowly arranged, the clamping piece 1262 is clamped outside the first shaft 121, and the clamping piece 1262 is coaxially arranged with the limiting piece 1261, the clamping piece 1262 is attached to the limiting piece 1261, the limiting piece 1261 is connected to the first shaft 121, and the limiting piece 1261 and the clamping piece 1262 cooperate with each other to limit the rotation freedom degree of the first shaft 121.

[0032] When the vertical distributed photometer 100 is used, the measured lamp is fixed on the lamp holder 132, the control rod 1263 is controlled to control the clamping piece 1262 to loosen the first shaft 121, at this time, the first shaft 121 is rotated, the first shaft 121 can drive the lamp holder 132 to rotate through the lamp holder arm 131, the first shaft 121 drives the lamp holder 132 and the measured lamp to move when the first shaft 121 is rotated, until the measured lamp moves to the required test position, the control rod 1263 is controlled to control the clamping piece 1262 to lock the first shaft 121, and the first shaft 121 is fixed, so as to fix the measured lamp at the required test position.

[0033] Further, as shown in Figure 5As shown, the limiting member 1261 includes a first limiting protruding part 1261a and a first flat part 1261b, and the clamping member 1262 includes a second limiting protruding part 1262a and a second flat part 1262b. The first limiting protruding part 1261a corresponds to a central angle α, and the second limiting protruding part 1262a corresponds to a central angle β. Optionally, the central angle α is equal to 90°, and the central angle β is equal to 90°. The limiting member 1261 is attached to the clamping member 1262, the first limiting protruding part 1261a of the limiting member 1261 is attached to the second flat part 1262b of the clamping member 1262, and the second limiting protruding part 1262a of the clamping member 1262 is attached to the first flat part 1261b of the limiting member 1261.

[0034] In use of the vertical distributed photometer 100, the control lever 1263 is operated to control the clamping member 1262, the clamping member 1262 releases the first shaft 121, at this time, the first shaft 121 is adjusted, the limiting member 1261 rotates, the first limiting protruding part 1261a of the limiting member 1261 rotates along the second flat part 1262b of the clamping member 1262, until the measured lamp is moved to the required test position, the control lever 1263 is operated to adjust the clamping member 1262, the clamping member 1262 locks the first shaft 121, and the measured lamp is fixed at the required test position. The first limiting protruding part 1261a of the limiting member 1261 rotates to the position where it abuts against the second limiting protruding part 1262a of the clamping member 1262, and the rotation range of the first limiting protruding part 1261a of the limiting member 1261 is the rotation freedom degree of the first shaft 121. Based on the setting of the limiting protruding parts of the limiting member 1261 and the clamping member 1262, the rotation freedom degree of the first shaft 121 is limited through the mutual cooperation of the limiting member 1261 and the clamping member 1262.

[0035] As an implementation manner, as shown in Figure 6 As shown, the angle adopting assembly 125 includes a first gear 1251, a second gear set 1252, and an angle sensor 1253. The first gear 1251 is sleeved on the outside of the second shaft 122, the second gear set 1252 is arranged on one side of the first gear 1251, the second gear set 1252 is engaged with the first gear 1251, and the angle sensor 1253 is connected to the second gear set 1252. When the second shaft 122 rotates, the first gear 1251 rotates with the second shaft 122, the second gear set 1252 is engaged with the first gear 1251, the first gear 1251 drives the second gear set 1252 to rotate, and the angle sensor 1253 obtains and records the rotation angle of the second shaft 122 through the second gear set 1252. The second shaft 122 is coaxially arranged with the rotation shaft of the test mechanism 14, the second shaft 122 drives the test mechanism 14 to rotate, and the angle sensor 1253 directly and accurately obtains the rotation angle of the second shaft 122 through the second gear set 1252, so as to accurately control the rotation angle of the test mechanism 14.

[0036] Further, as shown in Figure 6 the second gear set 1252 includes two second gears 1252a stacked with each other, and the first gear 1251 is in engagement with the two second gears 1252a of the second gear set respectively when the first gear 1251 rotates, so that the rotation angle information recorded by the angle sensor 1253 is more accurate. The second gear set 1252 further includes a tension spring, and the two second gears are both provided with notches 1252b, and the two ends of the tension spring are connected to the notches 1252b of the two second gears respectively, so that the two second gears have a certain angle difference through the tension of the tension spring, and the tooth surfaces of the two second gears 1252a are more in engagement with the tooth surface of the first gear 1251 at each engagement, so as to avoid the backlash of the gears when rotating to affect the accuracy of the angle obtained by the angle sensor 1253, and improve the accuracy of the rotation angle information recorded by the angle sensor 1253.

[0037] As an implementation manner, as shown in Figure 7 the driving assembly 124 includes a driving motor 1241 and a speed reducer 1242. One end of the speed reducer 1242 is drivingly connected to the driving motor 1241, and the other end of the speed reducer 1242 is drivingly connected to the second shaft 122. The driving motor 1241 is used to provide power to drive the second shaft 122 to rotate, and the speed reducer 1242 is used to reduce the rotating speed of the driving motor 1241, so as to realize that the rotating speed of the second shaft 122 meets the test requirements, and avoid that the driving motor 1241 has a negative impact on the equipment due to the too fast rotating speed.

[0038] Further, the speed reducer 1242 can be configured as a hollow rotary speed reducer 1242, which is drivingly connected to the second shaft 122 through a gear sleeved outside the second shaft 122, so that the driving motor 1241 drives the second shaft 122 to rotate through the hollow rotary speed reducer 1242. The hollow rotary speed reducer 1242 is modular and convenient, which can simplify the design of the driving assembly 124 and improve the safety of the equipment.

[0039] As an implementation manner, as shown in Figure 8 the test mechanism 14 further includes a reflector 144 and a detector 145. The reflector 144 is connected to the reflector support 142, and the detector 145 is connected to the detector support 143. Optionally, the detector 145 includes at least one of a near-field photometric detector 145 or a chromaticity detector 145. The reflector 144 and the detector 145 are used to measure the light distribution performance of the measured lamp.

[0040] As an implementation manner, as shown in Figure 9As shown, the inner side of the second shaft 122 is rotatably connected to the first shaft 121 through at least two bearings, i.e., the first bearing 1221a and the third bearing 1221c, and the outer side of the second shaft 122 is rotatably connected to the mounting base 123 through at least one second bearing 1221b, so as to ensure the stability of the second shaft 122.

[0041] Further, as shown, Figure 9 As shown, the outer side of the second shaft 122 is further provided with a conductive slip ring 1222 coaxially arranged with the second shaft 122. The conductive slip ring 1222 is used for signal transmission. For example, the conductive slip ring 1222 can be divided into a fixed ring and a movable ring. The fixed ring is fixed on the bearing seat of the bearing 1221b, and the signal line of the fixed ring is connected to the signal processing end of the device. The movable ring is fixed on the second shaft 122, and the signal line of the movable ring is connected to the detector 145 through the detector support 143 of the testing mechanism 14 based on the second shaft 122. When the vertical distributed photometer 100 is used, the detector 145 rotates with the detector support 143, and the light signal of the measured lamp detected by the detector 145 is transmitted to the signal processing end of the device through the signal line of the conductive slip ring 1222, so as to complete the collection and recording of the test data of the measured lamp.

[0042] According to the above description, the vertical distributed photometer 100 provided by the present application can drive the measured lamp and the testing mechanism 14 to rotate at different rotation amplitudes through the sleeving arrangement of the first shaft 121 and the second shaft 122. The measured lamp is fixed at the required testing position by the limiting assembly 126, the testing mechanism 14 is rotated around the measured lamp by the second shaft 122, and the light distribution performance of the measured lamp is tested. The rotation angle of the second shaft 122 is collected by the angle sampling assembly 125, the rotation amplitude of the second shaft 122 is accurately controlled, the testing mechanism 14 is rotated around the measured lamp based on the rotation of the second shaft 122, and the angle information collected by the angle sampling assembly 125 can be used to accurately control the rotation of the testing mechanism 14 around the measured lamp, thereby improving the accuracy of the light distribution performance test of the measured lamp.

[0043] Finally, it should be noted that the above is only some preferred embodiments of the present application and is not intended to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or equivalently replace some technical features thereof, and any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A vertical goniophotometer for measuring the light distribution performance of a light source, characterized in that: include: A body, wherein a receiving cavity is formed in the body; A drive mechanism, wherein at least a portion of the drive mechanism is disposed in the accommodating cavity, the drive mechanism comprising a first shaft, a second shaft, a mounting seat, a drive assembly, and an angle sampling assembly for obtaining the rotation angle of the second shaft, wherein the first shaft has a degree of freedom of rotation between a first position and a second position, and the angle between the first position and the second position is less than or equal to 180°, the second shaft is coaxially arranged with the first shaft, the second shaft has a degree of freedom of rotation relative to the first shaft, the second shaft is disposed outside the first shaft, the second shaft is transmission-connected to the drive assembly, at least a portion of the angle sampling assembly is sleeved outside the second shaft, and the drive assembly and the angle sampling assembly are both connected to the mounting seat; a lamp stand mechanism, the lamp stand mechanism comprising a lamp stand arm and a lamp stand connected to the lamp stand arm, wherein the rotation axis of the lamp stand arm is coaxial with the axis of the first shaft, and the lamp stand arm is sleeved onto the outside of the first shaft of the driving mechanism; A testing mechanism, the testing mechanism includes a testing arm, a mirror bracket connected to one end of the testing arm, and a detector bracket connected to the other end of the testing arm, the rotating axis of the testing arm and the axis of the second axis are coaxially arranged, and the testing arm is sleeved on the outside of the second axis of the driving mechanism.

2. The vertical goniophotometer according to claim 1, characterized in that: The angle sampling assembly includes a first gear, a second gear set and an angle sensor. The first gear is sleeved on the outside of the second shaft, the second gear set is arranged on one side of the first gear, the second gear set is meshed with the first gear, and the angle sensor is connected to the second gear set.

3. The vertical goniophotometer according to claim 2, characterized in that: The second gear set includes two stacked second gears and a tension spring for making the second gear set fit to the first gear. The second gear is provided with a notch, and both ends of the tension spring are respectively connected to the notches of the two second gears.

4. The vertical goniophotometer according to claim 1, characterized in that: The driving assembly includes a driving motor and a reducer, one end of the reducer is transmission-connected to the driving motor, and the other end of the reducer is transmission-connected to the second shaft.

5. The vertical goniophotometer according to claim 4, characterized in that: The reducer is a hollow rotary reducer, and the hollow rotary reducer is connected to the second shaft through a gear transmission sleeved on the outside of the second shaft.

6. The vertical goniophotometer according to claim 1, characterized in that: The driving mechanism also includes a limiting assembly for limiting the rotational freedom of the first shaft, the limiting assembly includes a limiting member, a clamping member and a control rod, the clamping member is connected to the mounting seat, the clamping member is coaxially arranged with the limiting member and fits to the limiting member, the limiting member is connected to the first shaft, and the control rod is connected to the clamping member and is used to control the tightness of the clamping member.

7. The vertical goniophotometer according to claim 6, characterized in that: The limiting member includes a first limiting protrusion and a first plane portion, and the clamping member includes a second limiting protrusion and a second plane portion. The central angle corresponding to the first limiting protrusion is 90°, and the central angle corresponding to the second limiting protrusion is 90°. The first limiting protrusion is attached to the second plane portion, and the second limiting protrusion is attached to the first plane portion.

8. The vertical goniophotometer according to claim 1, characterized in that: A conductive slip ring for signal transmission is further provided on the outer side of the second shaft, and the conductive slip ring is coaxially arranged with the second shaft.

9. The vertical goniophotometer according to claim 1, characterized in that: The inner side of the second shaft is rotatably connected to the first shaft via at least two bearings, and the outer side of the second shaft is rotatably connected to the mounting seat via at least one bearing.

10. The vertical goniophotometer according to claim 1, characterized in that: The testing mechanism further includes a reflector and a detector, wherein the reflector is connected to the reflector bracket, the detector is connected to the detector bracket, and the detector includes at least one of a near-field photometric detector and a colorimetric detector.

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