Abstract: People counting device for an elevator car for determining a person entering or leaving the car, having a presence sensor at the entrance of the car for detecting the presence of a person in the region of the entrance or the passage of a person through the entrance and for outputting a detection signal in the event of presence or passage, having an accelerometer on the car, for detecting the vertical acceleration of the car and for outputting positive and negative acceleration values in relation to the upwards direction of movement of the car, and having an evaluation device that is designed, upon receipt of the detection signal, to receive a series of current acceleration values for a certain duration and to analyze whether one of the acceleration values or the motion profile resulting therefrom exceeds an upper threshold value or falls below a lower threshold value.

Abstract: A light grid for mounting on an elevator car door for object detection and for determining periodic door movements, including transmitter elements that emits radiation with a specific intensity, receiver elements for receiving the radiation from an assigned transmitter element, and a control device for evaluating the receiver elements in regard to interruption of the radiation coming from an assigned transmitter element and for outputting a signal for object recognition upon interruption. At least one receiver element is configured to output an intensity value for the received radiation. The control device evaluates the intensity value and distinguishes separate high, medium and low intensity value ranges with high, medium and low intensity values, and performs an alternation phase with at least one alternating from the low via the medium to the low intensity value range and to output a signal in the event of an alternation phase having been recognized.

Abstract: A method, a system, and a device for diagnosing a vehicle, and a server. The method is applied to a server and includes: receiving vehicle diagnosis request information sent by a vehicle diagnosis device, where the vehicle diagnosis request information includes identity information of a user and a vehicle type; determining whether the user has an authorization of vehicle diagnosis software corresponding to the vehicle type, based on the identity information of the user; returning authorization information, for the vehicle diagnosis device to diagnose a to-be-diagnosed vehicle, if it is determined that the user has the authorization; and returning prompt information to prompt the user to acquire the authorization of the vehicle diagnosis software corresponding to the vehicle type and then to diagnose the to-be-diagnosed vehicle, if it is determined that the user does not have the authorization.