Dosing pump for car wash equipment

A computing unit for determining an actual delivery volume for a dosing pump intended for delivering a substance from a container and for use in a vehicle washing system, comprising:

• a first read-in interface for reading in a container data record for the container from which the substance is to be delivered by means of the dosing pump, wherein the container data record is an electronic data set which is provided for the container, and wherein the container data record contains information about the design, size and/or a holding volume of the container;
• a second read-in interface for reading in a digital filing level value representing a fill level measured in the container by means of at least one analog fill level sensor, or
• a third read-in interface for reading in a digital pressure value representing a pressure measured in the container by means of at least one analog pressure sensor or a fourth read-in interface for reading in a density value for the substance to be delivered with the dosing pump;
• the computing unit being intended for determining an actual delivery volume which has actually been delivered by the dosing pump in a measurement time interval, by applying a first function to the digital level value read in by means of the second read-in interface and the container data record read in by means of the first read-in interface or by applying a second function to the pressure value read in by means of the third read-in interface and the density value read in by means of the fourth read-in interface and the container data record read in,
• wherein the computing unit further comprises an output interface adapted for outputting the determined actual delivery volume.

A vehicle washing system comprising:

• a dosing pump;
• and
• a computing unit, the computing unit including,
• a first read-in interface for reading in a container data record for the container from which the substance is to be delivered by means of the dosing pump, wherein the container data record is an electronic data set which is provided for the container, and wherein the container data record contains information about the design, size and/or a holding volume of the container;
• a second read-in interface for reading in a digital filing level value representing a fill level measured in the container by means of at least one analog fill level sensor, or
• a third read-in interface for reading in a digital pressure value representing a pressure measured in the container by means of at least one analog pressure sensor, or
• a fourth read-in interface for reading in a density value for the substance to be delivered with the dosing pump;
• the computing unit determining an actual delivery volume which has actually been delivered by the dosing pump in a measurement time interval, by applying a first function to the digital level value read in by means of the second read-in interface and the container data record read in by means of the first read-in interface or by applying a second function to the pressure value read in by means of the third read-in interface and the density value read in by means of the fourth read-in interface and the container data record read in, wherein the computing unit further comprises an output interface adapted for outputting the determined actual delivery volume.

A computer program, the computer program being loadable into a memory unit of a computing unit and containing program code portions for causing the computing unit to execute a method for determining an actual delivery volume comprising steps of:

• reading in a container data record for a container from which a substance is to be delivered by means of a dosing pump, wherein the container data record is an electronic data record which is provided for the container, and wherein the container data record contains information about a design, size, or a holding volume of the container;
• reading in a digital filling level value representing a filing level measured in the container by means of at least one analog level sensor, or
• reading in a digital pressure value representing a pressure measured in the container by means of at least one analog pressure sensor and reading in a digital density value for the substance to be delivered by the dosing pump;
• determining and outputting the actual delivery volume which has actually been delivered by the dosing pump, by applying a first function to the digital level value read in step b) and the container data record read in step a) or by applying a second function to the pressure value read in step c) and the density value read in step c) and the container data record read in step a).