DE2320405A1 - TACHOGRAPH WITH ELECTROMECHANICALLY AMPLIFIED, VOLTAGE DEPENDENT MEASUREMENT AND RECORDING - Google Patents

Description

Tachograph with electromechanically amplified, voltage-dependent measurement and recording

The invention relates to a tachograph with electromechanically amplified, voltage-dependent measurement and Recording of revolutions or speeds.

The previously known types of trip recorders that either work according to the \ 7irbelstromprir.zip or according to the centrifugal pendulum or chronometer system due to their relatively high number of mechanical assemblies and elements a correspondingly high effort in the production of »3s' result inevitably from the Manufacturing and honing age-related Ilaengel, which is in shape knock down by llessf ehlem.

A typical device for all of the 'trip recorders' listed here The disadvantage is that it is driven by a flexible V / 'elle their susceptibility to breakage and the like was eliminated by the fact that a so-called electrical V / elle is used in which one of a Tachogenerator generated voltage proportional to the respective speed via a voltmeter for operation used for display and recording.

The previously "known types of tension meter tachographs are not able to use the international Requirements corresponding quality of the display and to ensure recording accuracy.

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ORIGINAL

If this type of guy is the recording in Tom one ! Arc and is heated by means of a pen or designed as an electrode pen on the Burned in data carrier.

Use offers another recording option a pen excited by a multivibrator. Because of these allowances, it was possible, despite the am Tension meter existing low actuating forces to come to a record at all.

The object of the invention is to develop a tachograph which works according to the principle of voltage measurement known per se, which, with the inclusion of electromechanical Components the read values given by the voltmeter are electromechanically reinforced and thus achieved good recording and display quality.

According to the invention, the task became through the development a trip recorder with electromechanically amplified, voltage-controlled reading and recording of speeds or speeds redeemed. A tachometer generator known per se is electrically connected to a voltmeter in the tachograph whose rotating shaft has a preferably rigidly arranged and with contact areas on both sides covered Kontaktara wears. This moves between a!. ■ aximuakonta.l-ct and an Iliniaumkontakt zur Control of a servomotor operated with external voltage. For the mechanical drive of a display device and a

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writing device is a gear after the servomotor. ^ arranged.

In the following, the invention will be based on an exemplary embodiment and the associated drawing will be explained in more detail.

The license plate of a tachograph with an iless system for electromechanically amplified, voltage-dependent measurement and recording is that the rotation of the rotating shaft of a voltmeter to control the downstream display and writing system is used.

The voltage generated by a tachometer generator, not shown in the drawing, causes the rotation of the 'rotating shaft 2 of the voltmeter 1.A _{contact arm 3 t} , which is rigidly connected to the voltmeter 1 instead of the otherwise unavailable pointer and is equipped with contact surfaces on both sides, is moved and provides thereby the contact with a maximum contact 4 at rest on a contact sat carrier. 6 ago. By closing the contact, the servomotor 7 is switched on, which causes a rotation of the contact set carrier 6 by means of an external voltage from the vehicle electrical system via an interposed and appropriately designed gearbox 8. This follows the direction of movement of the contact arm 3 until the rotation of the rotating shaft of the voltmeter caused by the instantaneous voltage value is reached

the contact between the contact arm 3 and the "maximum contact" 4 is interrupted. ·

If the voltmeter 1 is now on a lower value, it will be due to the declining Rotation of the contact set carrier 6 now closes the contact via the contact arm 3 with the minimum contact 5 on the contact set carrier 6. The polarity of the servomotor 7 is reversed as a result and its current direction of rotation, equal to the direction of movement of the contact arm 3, is maintained as long as until here, too, according to the instantaneous voltage applied to the coil of the voltmeter, a Separation of the contacts takes place. The display and recording of the respective measurement data represents a continuously strung together sequence of these aforementioned processes. Via a corresponding designed gear 8, the relatively small rotation of the voltmeter 1 is translated in such a way that the prescribed for the functional conditions of a tachograph Deflections for the actuation of the display device 9 and writing device 10 can be achieved

Both between the contact set carrier 6 and the gear 8 and between the display device 9 and the writing device 10 on the one hand and the transmission 8 on the other hand, return springs 11 are arranged. This is supposed to be the tooth play between the individual transmission elements a, uf reduced to a minimum and a falsification of the measured values from the outset be avoided.

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Claims (1)

Potent a η s ρ r Ii ο! Ι 1. Tachograph nit electromechanically amplified, tension-dependent measurement and drawing of turning tools or speeds, gelcennzeiclinet through the electrical connection of a tachometer generator oekrnnteii with a "tension meter (1), whose rotating shaft (2) is preferably rigidly arranged wears a contact arm (3) fitted on both sides with no liontaktilaecher, which is provided between an Ilaxinunikontakt (4) and an Ilinimumkontakt (5) of a contact set carrier (6) for controlling a servomotor (7) operated with external voltage, which is used to mechanically drive a Display device (9) 'and a writing device (10) is followed by a gear (S). 409S10 / 0339