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US 11,959,824 B2Granted
Method for monitoring a belt drive
AssigneeContiTech Antriebssysteme GmbH
InventorsTim Fiss, Philipp Freiheit, Arne Hinz, Svenja Rosenbohm
Life of this patent
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Abstract
A method for monitoring a drive belt is disclosed. A drive pulley driving by a drive motor and having a drive belt is provided. First and second markings are provided on the belt. The markings are detected. A correlation is determined and a signal is generated if a reference value is exceeded.
Claims26
A method for monitoring a belt drive, the method comprising:
- providing at least one drive pulley driven by a drive motor, a driven pulley and at least one power-transmitting endless drive belt which is in the form of a traction belt and wraps around the drive and driven pulleys circumferentially over a partial circumference in each case;
- wherein the belt has at least one first marking and at least one first sensor element assigned to the belt is provided;
- wherein the passage of the first marking is detected by the first sensor element during the belt revolution and the first sensor element has electronic devices for outputting a signal SR dependent on the detection of the first marking;
- wherein the rotor of the drive motor has at least one second marking and a second sensor element which is provided with corresponding electronic devices and is assigned to the drive motor is provided, wherein, while the rotor is rotating;
- the passage of the second marking is detected by the second sensor element and a signal SM dependent on the detection of the second marking is output, in that, furthermore, a computing unit provided with memories and processors for processing the signals SR and SM is provided;
- a temporal or local correlation of the occurrence of the signals SR and SM is calculated in the computing unit when the drive belt is new and is stored as a reference value;
- wherein the associated signals SR and SM are then repeatedly determined for further specified belt revolutions or periods of time and their current temporal or local correlation of the occurrence is compared with the reference value;
- and
- wherein a warning or alarm signal is output by the computing device after a specified tolerance value between the current correlation and the reference value has been exceeded.
6 more elements
A belt drive comprising:
- at least one drive pulley driven by an electric drive motor;
- a driven pulley;
- and
- at least one power-transmitting endless drive belt which is in the form of a traction belt and wraps around the drive and driven pulleys circumferentially over a partial circumference in each case;
- wherein the belt has at least one first marking and at least one first sensor element which is assigned to the belt and is intended to detect the first marking is provided, wherein the first sensor element has electronic devices for outputting a signal SR dependent on the detection of the first marking, wherein the rotor of the electric drive motor has at least one rotary encoder or position encoder (as an incremental or absolute encoder) which can be used to detect the position or speed of the rotor during the motor rotation and to output a signal SM dependent on the position or speed;
- a computing unit provided with memories and processors for processing the signals SR and SM is provided, wherein a temporal or local correlation of the occurrence of the signals SR and SM can be calculated in the computing unit when the drive belt is new and can be stored as a reference value and can be compared with corresponding correlations for repeated, further specified belt revolutions or periods of time;
- and
- wherein a warning or alarm signal can be generated by the computing device after a specified tolerance value between the current correlation and the reference value has been exceeded.
5 more elements
A method for monitoring a drive belt, the method comprising:
- providing a steering gear having first and second toothed belts of the drive belt arranged in parallel;
- marking the first and second belts with a first marking of strips of polymeric materials with magnetizable particles applied over a belt width on back sides for the first and second belts;
- sensing the first and second belts with first and second electronic devices to generate signals SR1 and SR2 for the first and second belts respectively;
- detecting the passage of the first marking of the first and second belts based on the signals SR1 and SR2;
- providing second markings on a rotor of a drive motor;
- sensing the rotor with a third electronic device to generate a rotor signal SM;
- detecting passage of the second markings based on the rotor signal SM;
- determining a speed of the rotor based on the signal SM;
- and
- determining an angular offset between the drive belt and the rotor by one or more processors based on the signals SR1, SR2 and SM.
7 more elements
Dependencies are inferred from the claim text.