Laboratory sample distribution system and method for calibrating magnetic sensors
First Claim
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1. A laboratory sample distribution system, the laboratory sample distribution system comprising:
- a plurality of sample container carriers, wherein each sample container carrier carries one or more sample containers and comprises at least one magnetically active device;
a transport plane to support the sample container carriers;
a plurality of electro-magnetic actuators stationary arranged below the transport plane, wherein the electro-magnetic actuators move the sample container carriers on top of the transport plane by applying a magnetic force to the sample container carriers;
a plurality of magnetic sensors distributed over the transport plane;
a control unit to control the movement of the sample container carriers on top of the transport plane using signals provided by the magnetic sensors by driving the electro-magnetic actuators such that the sample container carriers move along corresponding transport paths;
a calibration device, wherein the calibration device comprises,a magnetic calibration element causing a magnetic calibration field, anda driver to change a distance between the magnetic calibration element and a magnetic sensor;
a position determining device to determine the distance between the magnetic calibration element and a respective magnetic sensor; and
a calibration control unit, wherein the calibration control unit is configured to monitor signals received from the magnetic sensors while the distance between the magnetic calibration element and a respective magnetic sensor changes, and wherein the calibration control unit is configured to determine magnetic sensor parameters for each of the magnetic sensors in response to the signals received from the magnetic sensors and the determined distance.
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Abstract
A laboratory sample distribution system comprising a calibration device, a calibration device and a method for calibrating magnetic sensors are disclosed. Magnetic sensors used in a laboratory sample distribution system are calibrated in order to optimize driving of sample container carriers and in order to detect long-term variation in detection characteristics of the magnetic sensors.
153 Citations
14 Claims
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1. A laboratory sample distribution system, the laboratory sample distribution system comprising:
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a plurality of sample container carriers, wherein each sample container carrier carries one or more sample containers and comprises at least one magnetically active device; a transport plane to support the sample container carriers; a plurality of electro-magnetic actuators stationary arranged below the transport plane, wherein the electro-magnetic actuators move the sample container carriers on top of the transport plane by applying a magnetic force to the sample container carriers; a plurality of magnetic sensors distributed over the transport plane; a control unit to control the movement of the sample container carriers on top of the transport plane using signals provided by the magnetic sensors by driving the electro-magnetic actuators such that the sample container carriers move along corresponding transport paths; a calibration device, wherein the calibration device comprises, a magnetic calibration element causing a magnetic calibration field, and a driver to change a distance between the magnetic calibration element and a magnetic sensor; a position determining device to determine the distance between the magnetic calibration element and a respective magnetic sensor; and a calibration control unit, wherein the calibration control unit is configured to monitor signals received from the magnetic sensors while the distance between the magnetic calibration element and a respective magnetic sensor changes, and wherein the calibration control unit is configured to determine magnetic sensor parameters for each of the magnetic sensors in response to the signals received from the magnetic sensors and the determined distance. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification