CN2634448Y - Rotary work table of rotary distribution photometer - Google Patents

Abstract

The rotary table of the goniophotometer of the utility model includes a base, a horizontal rotating main shaft fixed on the base, one end of the main shaft is fastened to the boom and one end of the cantilever, the boom is perpendicular to the main shaft, and the center line of the cantilever is connected to the main shaft. The axis of the cantilever coincides, the other end of the cantilever is fixed with a reflector at an angle of 45 degrees to the main shaft, and the other end of the boom is fixed with a synchronous shaft parallel to the main shaft and synchronously rotated in reverse with the main shaft, one end of the synchronous shaft and the lamp arm One end is fixed, and the other end of the lamp arm is equipped with a vertical rotating shaft for connecting lamps. In the rotating workbench of the utility model, when the reflector rotates, the lamp arm always maintains a vertical position. In this way, when measuring lamps with high-intensity gas lamps, it can be ensured that the lamps will not be turned over, so that the light emission of the lamps is stable and unchanged. The measuring lamp on the vertical axis rotates around the vertical axis, so that the light emitted by the lamp in each direction can be reflected to the photometric probe through the 45-degree reflector, so as to realize the accurate measurement of the spatial distribution photometric parameters of the lamp.

Description

Rotary table for rotary goniophotometers

Technical field

The utility model relates to a rotary worktable for photometric measurement.

Background technique

The distribution of light in all directions in space is an important parameter for light sources and luminaires. There are usually two ways to measure the light distribution of light sources and lamps. One is to fix the lamp, and the detector moves around the lamp in all directions in space to measure the light signals in all directions. The other is that the detector is fixed, the lamp rotates around the horizontal axis or the vertical axis, and the light signals of the lamp in all directions are projected onto the detector, so as to measure the light distribution in all directions in space. However, in the measurement of spatial light distribution of lamps, there are special restrictions for different lamps. For example, for many high-intensity discharge lamps, the lamps are not allowed to turn over and move during the measurement process to change their ignition status. For floodlights, other The beam angle is wide, and the test distance from the lamp to the detector is required to be relatively short during measurement. For narrow beam flood lamps, the beam angle is small and the luminous intensity is large, and the measurement distance is required to be long. Therefore, it is generally required that the measuring distance of the measuring instrument can be adjusted according to the measured lamp. In the existing GMS-1800 horizontal goniophotometer, the lamp must be flipped and moved during the measurement process, but for the R100 moving mirror goniophotometer, the measuring distance from the lamp to the detector is fixed and the measuring light incident on the detector is consistent with the detector The surface is not vertical, affecting the measurement accuracy.

Contents of Invention

The utility model aims at providing a rotary workbench of a rotary distribution photometer with high measuring precision and convenient use.

The rotary workbench of the rotary goniophotometer of the utility model includes a base, and a spindle drive box fixed on the base. The spindle drive box is equipped with a horizontal spindle supported by a bearing, and is directly driven or driven by a motor placed in the box. The motor with reducer is driven to rotate. One end of the main shaft extends out of the drive box and is fastened to one end of the boom and one end of the cantilever. The boom is perpendicular to the main shaft, the center line of the cantilever coincides with the axis of the main shaft, and the other end of the cantilever is fixed with The mirror frame, the mirror surface of the mirror mounted on the mirror frame is at an angle of 45 degrees to the axis of the main shaft, and a synchronous shaft drive box is fixed at the other end of the arm, and a synchronous shaft is installed in the synchronous shaft drive box to synchronize The rotating shaft is parallel to the main shaft, driven by the synchronous shaft driver, and rotates in the opposite direction synchronously with the main shaft. The synchronous rotating shaft extends out of the synchronous shaft drive box end and is fixed to one end of the lamp arm. The other end of the lamp arm is fixed with a box that drives the lamp to rotate. Inside the box A vertical shaft for connecting to a lamp is installed, and the vertical shaft is directly driven by a motor or driven by a motor with a reducer.

The synchronous shaft driver that drives the synchronous shaft to rotate in the opposite direction synchronously with the main shaft can be a motor installed in the synchronous shaft drive box or a motor with a reducer, or it can be a gear drive or a synchronous belt drive or a chain drive that connects the synchronous shaft and the main shaft. mechanical transmission mechanism.

When working, the main shaft is directly driven by the motor or driven by a motor with a reducer to drive the boom, the synchronous shaft drive box installed on the boom and the mirror to rotate around the axis of the horizontal main shaft. At the same time, the synchronous The rotating shaft is driven by the motor directly or with a reducer, or driven by a mechanical transmission mechanism connected to the main shaft, such as gear transmission, synchronous belt transmission, chain transmission, etc., to drive the lamp arm to rotate in reverse and synchronously, thus ensuring the reflector When swiveling, the lamp arm always maintains a vertical position. The measuring lamp of the rotating box of the lamp installed at one end of the lamp arm is always in a suspended state while making a circular motion around the horizontal axis. In this way, when measuring lamps with high-intensity gas lamps, it can be ensured that the lamps will not be turned over, so that the light emission of the lamps is stable and unchanged. The measuring lamp installed on the vertical axis of the rotating box of the lamp rotates around the vertical axis, so that the light emitted by the lamp in each direction can be reflected to the photometric probe through a 45-degree reflector, and the spatial distribution photometric parameters of the lamp can be accurately measured. .

The main shaft drives the arm and the reflector to rotate around the main shaft axis, which can be rotated back and forth, or can be rotated in a continuous circular motion. In order to provide stable power supply to the lamp during the continuous rotation measurement process, and to provide drive for the motor in the lamp rotation box signal, prevent wires from getting tangled. Main shaft and synchronous rotating shaft in the utility model can adopt hollow shaft or make a section of shaft be hollow, install conductive slip ring on hollow shaft, the sliding inner sleeve of slip ring is fixed with rotating shaft, and shell is fixedly connected with the support of reducer. The power line of the measuring lamp and the motor drive signal line in the rotating shaft of the lamp pass through the hollow shaft through the conductive slip ring, and are respectively connected to the lamp and the motor.

Usually, in order to prevent the rotation axis of the lamp from deviating from the vertical position during the measurement process, a direction finder for detecting whether the rotation axis of the lamp is in a vertical position can be installed on the lamp arm. device. When the rotation axis of the lamp deviates from the vertical position, the direction finder outputs a control signal for adjusting the running speed of the synchronous shaft.

The utility model can be used for photometric measurement of the spatial distribution of various lamps, has high measurement precision and is convenient to use.

Description of drawings

Fig. 1 is a kind of concrete structural representation of the utility model

Detailed ways

Referring to Fig. 1, the rotary table of the rotary goniophotometer of the present utility model comprises a base 1, a main shaft drive box 3 fixed on the base 1, and a horizontal main shaft 8 is mounted on a bearing support in the main shaft drive box 3, in this example , the main shaft 8 adopts a hollow shaft, and a conductive slip ring 5 and a goniometer 4 for detecting the rotation angle are installed on the hollow shaft. The main shaft 8 is driven to rotate by a motor 6 with a reducer 7 placed in the box. Boom 25 and cantilever 24 are fastened on the flange of the main shaft 8 end face of drive box 3, big arm 25 is perpendicular to main shaft 8, and the center line of cantilever 24 coincides with the axis of main shaft 8. The other end of the cantilever 24 is fixed with a reflector frame 28, and the mirror surface of the reflector 20 installed on the reflector frame forms an angle of 45 degrees with the axis of the main shaft 8, so that the light emitted by the lamp can pass through 45 degrees in each direction. Reflective mirror is reflected on photometric probe 23, and the other end of big arm 25 is fixed with synchronous shaft drive box 21, and synchronous shaft drive box 21 is equipped with synchronous shaft 14, and synchronous shaft 14 is parallel with main shaft 8, and this example, synchronous shaft 14 adopts A hollow shaft, on which a conductive slip ring 11 is installed, and a synchronous rotating shaft 14 is driven to rotate by a motor 12 with a speed reducer 13 arranged in a synchronous shaft drive box 21 . One end of the synchronous rotating shaft 14 protrudes from the synchronous shaft driving box 21, and this end is fixed to one end of the lamp arm 19, and the other end of the lamp arm 19 is fixed with a box body 22 for driving the lamp to rotate, and the box body 22 is installed with a lamp for connecting the lamp. A vertical shaft 18 , here a vertical rotating shaft 18 is driven in rotation by an electric motor 15 with a reducer 16 . The vertical rotating shaft 18 can swing back and forth to rotate, and can also rotate continuously. In order to prevent wires from being entangled during continuous rotation, the vertical rotating shaft 18 can also adopt a hollow shaft, and a conductive slip ring 17 is installed on the shaft.

In the specific example shown in the figure, a balance arm 10 is installed on the other side of the axis of the main shaft symmetrical to the boom 25, one end of the balance arm is integrated with one end of the boom 25 and the cantilever 24, and a balance block is mounted on the balance arm 9. It is used to balance the imbalance caused by the weight of the boom, lamp arm and lamp. A direction finder 26 for detecting whether the lamp rotation axis 18 is in a vertical position is fixed on the lamp arm 19 .

The drive reducer 7 of the main shaft 8 in the main shaft drive box 3 and the drive reducer 13 of the synchronous rotating shaft 14 in the synchronous shaft drive box are preferably worm gear reducers, so that when the boom rotates to any position, the worm gear can be used. Self-locking function to prevent the device from flipping and falling.

Claims (10)

1. the rotary table of rotary distribution photometer, it is characterized in that comprising pedestal (1), be fixed in the main shaft drives case (3) on the pedestal (1), utilize bearings that horizontal spindle (8) is installed in the main shaft drives case (3), by place in this case motor direct-drive or the band speed reduction unit (7) motor (6) driven in rotation, one end of one end of main shaft (8) and big arm (25) and an end of cantilever (24) are fastening, wherein big arm (25) is vertical with main shaft (8), the dead in line of the center line of cantilever (24) and main shaft (8), the other end of cantilever (24) is fixed with reflective mirror mirror holder (28), the minute surface that is installed in the reflective mirror (20) on the reflective mirror mirror holder becomes miter angle with the axis of main shaft (8), the other end at big arm (25) is fixed with synchronizing shaft driving box (21), synchronous rotating shaft (14) is installed in the synchronizing shaft driving box (21), synchronous rotating shaft (14) is parallel with main shaft (8), by synchronizing shaft driver drives and the rotation of main shaft synchronous backward, synchronous rotating shaft (14) stretches out synchronizing shaft driving box (21) end to be fixed with an end of arm (19), the other end of arm (19) is fixed with the casing (22) that drives the light fixture rotation, the vertical rotation axis (18) that is used to connect light fixture is installed in the casing (22), and vertical rotation axis (18) is by motor (15) driven in rotation of motor direct-drive or band speed reduction unit (16).

2. the rotary table of rotary distribution photometer according to claim 1, it is characterized in that balance arm (10) being installed at opposite side with the main-shaft axis of big arm (25) symmetry, one end of this balance arm is integral with big arm (25) and cantilever (24) one client links, and counterbalance weight (9) is housed on balance arm.

3. the rotary table of rotary distribution photometer according to claim 1, the sync driver that it is characterized in that driving synchronous rotating shaft (14) rotation are provided in a side of the motor in the synchronizing shaft driving box (21) or the motor (12) of band speed reduction unit (13).

4. the rotary table of rotary distribution photometer according to claim 3, the driving speed reduction unit (13) that it is characterized in that synchronous rotating shaft (14) is a worm type of reduction gearing.

5. the rotary table of rotary distribution photometer according to claim 1, the sync driver that it is characterized in that driving synchronous rotating shaft (14) rotation are to connect synchronous rotating shaft (14) and the gear drive of main shaft (8) or synchronously with the mechanical transmission mechanism of transmission or chain drive.

6. the rotary table of rotary distribution photometer according to claim 1, the driving speed reduction unit (7) that it is characterized in that main shaft (8) is a worm type of reduction gearing.

7. the rotary table of rotary distribution photometer according to claim 1, it is characterized in that main shaft (8) and synchronous rotating shaft (14) be tubular shaft or axle one section for hollow, conducting slip ring (5) and (11) are housed respectively on axle.

8. the rotary table of rotary distribution photometer according to claim 1, the vertical rotation axis (18) that it is characterized in that connecting light fixture is a tubular shaft, and conducting slip ring (17) is installed on this tubular shaft.

9. the rotary table of rotary distribution photometer according to claim 1 is characterized in that being equipped with the goniometer (26) whether detection lamp turning axle (18) is in vertical position on arm (19).

10. the rotary table of rotary distribution photometer according to claim 1 is characterized in that going up device at main shaft (8) is useful on the angular instrument (4) that detects the anglec of rotation.

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