DE7833853U1 - SPIRAL PHOTOMETER - Google Patents

Description

"Spiral photometer"

The invention relates to a spiral photometer

; ί for light measurement with continuous spiral

· Shaped scanning of the light distribution body

ϊ; for the determination of total and partial light

t _t flow, luminous intensity distributions and light

3 technical substance indicators, consisting of one

horizontally arranged, drivable shaft,

$ at the free end a mirror under in particular

■ special 45 ° inclination to the shaft center axis

■ is attached to the further outside of the

Beam path of the mirror a right-angled protruding swivel arm is supported on its end carries a boom running parallel to the swivel arm, which rotates there in opposite directions is rotatably mounted synchronously to the shaft and the end of which is angled and aligned parallel to the shaft axis, at this end the light source to be measured can be attached parallel to the boom, furthermore from a spaced apart from the mirror, directed towards the mirror Receiving device, furthermore measuring and drive devices on the attachment point of the light source are arranged, which like the light source with a stationary power source S-sinä: ···:

'JL-'6 -

In such known systems, a fixed receiver is used for rotation Aes mirror around a horizontal axis and simultaneous botation of the light source around a horizontal and vertical axis recorded the desired measuring units.

The shaft, on which the mirror is attached at the end, is driven by means of a worm gear drive set in rotation, the worm driven by a motor that drives the gear arranged on the shaft. Near the pivot arm fixed point, another gear is arranged on the shaft, which has a Chain is connected to a gear attached to the boom axis.

The light source is attached to the angled end of the boom and is level with the Cantilever axis arranged.

When the swivel can be rotated, the boom is forced to be perpendicular to the light source held by moving in opposite directions synchronously.

At the point of the end of the Ausiger to which the light source is attached, respectively. in their Nearby, there are several electrical connections, e.g. for the lamp feed, for a Temperature measuring device, for a motor, for "e £ ne, ri; Täcjhtogenerator, for a protractor

and the like. Arranged.

These connections are made with appropriate Connected leads.

If the device is now set in rotation, the supply lines twist in themselves, As a result, at most a rotation of 360 ° in one direction is possible without Damage the supply lines.

The swivel arm must then be moved back in order to carry out measurements again can.

The complex and sensitive electronic measuring device must be switched off because it is only able to measure in one direction of rotation.

This discontinuous mode of operation is unbi peaceful.

Internally, it has therefore been suggested on the boom Arrange slip ring contacts in an appropriate number, so as to ensure a continuous Working method to achieve.

However, this solution is also inadequate, since slip ring contacts can represent considerable, unpredictable sources of error with the low Mefis currents , which completely falsify the measurement results.

Based on this, the invention is based on the object of a spiral photometer To create the type described at the beginning, despite the fixed supply connections a continuous Measurement method with any large angle of rotation allows.

I.e. the movable connector should be in direct connection with a fixed connection stand without hindering the rotation.

To solve this problem, the invention proposes that to connect the light source and the measuring and drive devices with a fixed power connection inside an in particular multi-core electrical cable is arranged on the hollow drive shaft, which on the one hand emerges from the rear of the shaft and on the other hand is bent at right angles through the hollow swivel arm and bent in opposite directions through the jewels of the arranged hollow boom extending into this and emerging from this boom can be connected to the connection points there.

In principle, there is a cranking of the Cable by pulling the cable from the fixed outer connection point in a straight line through the Drive shaft is guided, then bent by 90 ° in the area of the swivel arm fixed point, so that it runs parallel to the swivel arm from a corresponding opening in the drive shaft exit.

It then runs in a straight line to approximately the axis of rotation of the boom, i ^ t there again bent back by 90 ° and runs centrally into the axis of rotation of the boom, where it is in turn can be firmly clamped. After passing through the axis of rotation, this can Cable at any point out of the boom to the corresponding one at the end of the boom device connections located.

When the drive shaft rotates during operation and the opposite rotation of the As a result of the bend in the cable, the rotary movements acting on it are lifted from the boom with a 360 ° pan. The load on the cable is in the usual flexibility range, so that damage not successful a

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To absorb the loads that occur, it is particularly advantageous if the cable is off consists of several supply cables twisted together.

It is also preferred that the cable after

the

the rear exit from / hollow shaft is firmly clamped.

It can also be advantageous if the cable is arranged coaxially or axially parallel to the shaft axis and / or to the axis of rotation of the boom up to the respective bend angular gear, the boom motion controls, wherein the bevel gear is disposed substantially within the hollow swivel arm. ■

A further development, which is preferred especially in combination therewith, provides that the cable is inside of the swivel arm between the turning units in a rotatably mounted, parallel to ßchwenkarmlängsachse extending guide tube is arranged, which guide tube of a parallel shaft of the angular

ge drive can be set in rotation, the direction of rotation being reversed to the rotational movement this wave is.

The invention is in the accompanying drawing shown in the form of an exemplary embodiment and described in more detail below.

The figure shows a Spr.rophotometer of the type of rotating mirror system with one-sided Storage in side view, partially cut.

The spiral photometer consists of one horizontally mounted in bearing blocks 1 drive shaft 2, which has a shrunk on Gear 3 md an electromotive drive worm 4 in Rotation can be displaced, a swivel arm 5 welded to this drive shaft 2, one counterweight 6, one at the shaft front end Mirror 7> attached at 45 ° to the longitudinal axis of the shaft and one rotatably mounted at the upper end of the swivel arm 5 Boom 8 with an angled end 9 »on the measuring device 10 and the to testing lights respectively. Light sources are attachable.

- 12 -

At a considerable distance from the mirror 7, a measuring receiver is arranged in an imaginary extension of the wavelength axis to the right. For the purpose of a synchronous counter-rotating movement of boom 8.9 and swivel arm 5, an angular gear 11 is arranged that consists of a shaft-fixed ring gear 11 ^{a of} a shaft

b c

11, the end gear 11 meshes with the ring gear 11 and the other end attached bevel gear 11 with another bevel gear 11 one in the swivel arm 5

f
superimposed shaft 11 cooperates.

The rotary movement is transmitted from the shaft 11 via bevel gears 11 ^, 11 to a gear 11 ¹ , since it is axially parallel to the axis of rotation of the boom 8 in the swivel arm 5 and with a coaxial to the axis of rotation of the boom 8

depending on this attached gear 11 meshes.

If the shaft 2 is now set in rotation, the boom 8 rotates in the opposite direction Direction around its axis of rotation, so that it is always in a vertical direction, regardless of the angular position of the swivel arm 5

- 13 -

I In the hollow drive shaft 2 is a cable

'j _t 12 within a stationary guide tube

if 13 held non-rotatable.

f; Below the swivel arm 5 is i *> the wave

; | 2, a recess 2 is arranged ^a, through which the

f cable 12, which is twisted in the rest, under

J right-angled bend is passed through.

■ ί The cable lies along the entire curve

i 12 free.

* Through the swivel arm 5, the cable 12 is in turn

I guided parallel to the axis, whereby it is rotatable by one

■ ' _: , mounted protective tube 14 is surrounded.

£ The protective tube 14 rotates as a result of the tooth

% wheel drive 15.16 at the same speed

like shaft 11, but in the opposite direction.

Near the boom axis, the drill 14 ends, and the cable 12 is 90 in the original Sighting bent back, and passed through the hub 8 of the boom 8. In the hub 8 a sleeve 17 is firmly inserted, which holds the cable 12 there. Then the cable 12 is passed upward from the boom 8, from where it is with the

* t »Τι * ι

■ »I

corresponding devices can be connected. Simplified, a three-wire is usable here

shown.

In reality the cable has twenty and

more twisted wires.

With this system, any large rotary movements are possible in one direction,

For example 720 °, 1080 ° etc., without the cable

Echaden takes.

All new individual and combination features disclosed in the description and / or drawing Are considered essential to the invention.

Claims (6)

DipWng.Johannes Papproth Patent Attorney Lüdenscheid, Oe; .skingerWeg7 Telephone: (02351) 2 06 55 Az. 24.4-5 November 13, 1971 Hoffmeister-Leuchten (M) H. & Co.KG PO Box. 1820 5880 Lüdenscheid utility model registration "Spiralphotometer" protection claims: 1. Spiral photometer for light measurement with continuous spiral scanning of the light distribution body for determination of total and partial luminous fluxes, luminous intensity distributions and photometric material parameters, consisting of a horizontally arranged, drivable shaft, at the free end of which a mirror under in particular 45 ° inclination to the shaft center axis is attached, on the further outside of the beam path of the mirror a swivel arm protruding at right angles is held, the one at its end a 1 * ι · · · • ι · ι ι · ■ carries parallel to the swivel arm extending boom, which is mounted rotatably in opposite directions synchronously to the shaft and whose end is angled, aligned parallel to the shaft axis, at which end the light source to be measured can be attached parallel to the boom, furthermore from a spaced from the mirror, on the mirror directed receiving device, further measuring and drive devices are arranged at the attachment point of the light source, which like the light source are connected to a stationary power source, characterized in that to connect the light source cnä. of the measuring and drive devices (10) with a stationary power connection inside the hollow drive shaft (2) an especially multi-core electrical cable (12) is arranged, which on the one hand emerges from the shaft (2) at the rear and on the other hand is bent at right angles by the hollow swivel arm ( 5) and bent in opposite directions through ^ ie the bearing point (8) of the hollow boom (8). 2. Spiral photometer according to claim 1, characterized in that the cable (12) consists of several supply cables twisted together consists. 3. Spiralphtometer according to claim 1 or 2, characterized in that the cable (12) according to the rear exit from the hollow shaft (2) is firmly clamped. 4. Spiral photometer according to claim 1 to 3, characterized in that the cable (12) up to the respective bend coaxially respectively. is arranged axially parallel to the shaft axis and / or to the axis of rotation of the boom (8). 5. Spiral plctometer according to claim 1 to 4, characterized in that the shaft drive controls the disengagement movement via an angular gear (11) controls, wherein the angular gear (11) is arranged essentially within the hollow pivot arm (5). 6. Spiral phftometer according to claim 1 to 5, characterized in that the cable (12) is arranged within the pivot arm (5) between the turns in a rotatably mounted, parallel to the longitudinal axis of the pivot arm guide tube (14), which guide tube (14) of a parallel shaft (11) of the angular gear (11) can be set in rotation, the direction of rotation being the opposite of the rotational movement of this shaft (11 ^f ).