Control circuitry and calibration system

Abstract

Control circuitry outputs a pump command current corresponding to an actuator operation signal to pump equipment including at least one pump whose displacement increases in accordance with increase in the pump command current. The control circuitry: stores calibration data generated based on actual measurement data of the at least one pump, the actual measurement data indicating an actual relationship between the pump command current and the displacement of the at least one pump, the calibration data being data to correct the pump command current such that the displacement of the at least one pump transitions on a performance line that is preset for the actuator operation signal. The control circuitry: determines the pump command current based on the actuator operation signal; and corrects the determined pump command current by using the calibration data, and outputs the corrected pump command current to the pump equipment.

1 . Control circuitry for outputting a pump command current corresponding to an actuator operation signal to pump equipment including at least one pump whose displacement increases in accordance with increase in the pump command current, the displacement of the at least one pump being a delivery amount per rotation of the at least one pump,
 the control circuitry:
 stores calibration data generated based on actual measurement data of the at least one pump, the actual measurement data indicating an actual relationship between the pump command current and the displacement of the at least one pump, the calibration data being data to correct the pump command current such that the displacement of the at least one pump transitions on a performance line that is preset for the actuator operation signal; 
 determines the pump command current based on the actuator operation signal; and 
 corrects the determined pump command current by using the calibration data, and outputs the corrected pump command current to the pump equipment. 
   
     
     
         2 . The control circuitry according to  claim 1 , wherein
 the control circuitry:
 determines an actuator operation command current in accordance with the actuator operation signal; 
 receives an input of a rotation speed of an engine that drives the pump equipment and an input of a delivery pressure of the at least one pump, and determines a horsepower control command current based on the rotation speed and the delivery pressure; and 
 determines a smaller one of the actuator operation command current or the horsepower control command current as the pump command current. 
   
     
     
         3 . The control circuitry according to  claim 1 , wherein
 the control circuitry receives an input of the actual measurement data, stores the inputted actual measurement data, generates the calibration data based on the stored actual measurement data, and stores the generated calibration data.   
     
     
         4 . The control circuitry according to  claim 1 , wherein
 the control circuitry receives an input of the calibration data, and stores the inputted calibration data.   
     
     
         5 . Control circuitry for outputting a pump command current corresponding to an actuator operation signal to pump equipment including at least one pump whose displacement increases in accordance with increase in the pump command current, the displacement of the at least one pump being a delivery amount per rotation of the at least one pump,
 the control circuitry:
 receives an input of actual measurement data of the at least one pump, the actual measurement data indicating an actual relationship between the pump command current and the displacement of the at least one pump, and stores the inputted actual measurement data; 
 determines a pump command displacement based on the actuator operation signal; and 
 determines the pump command current corresponding to the pump command displacement by using the actual measurement data, and outputs the determined pump command current to the pump equipment. 
   
     
     
         6 . The control circuitry according to  claim 5 , wherein
 the control circuitry:
 determines an actuator operation command displacement corresponding to the actuator operation signal; 
 receives an input of a rotation speed of an engine that drives the pump equipment and an input of a delivery pressure of the at least one pump, and determines a horsepower control command displacement based on the rotation speed and the delivery pressure; and 
 determines a smaller one of the actuator operation command displacement or the horsepower control command displacement as the pump command displacement. 
   
     
     
         7 . A calibration system comprising:
 pump equipment including at least one pump whose displacement increases in accordance with increase in a pump command current, the displacement of the at least one pump being a delivery amount per rotation of the at least one pump;   at least one code displayed on a surface of the pump equipment, the at least one code storing actual measurement data of the at least one pump or save location information on the actual measurement data, the actual measurement data indicating an actual relationship between the pump command current and the displacement of the at least one pump;   the control circuitry according to  claim 3 ; and   a mobile terminal that obtains the actual measurement data by capturing an image of the at least one code and that transmits the obtained actual measurement data to the control circuitry via wireless communication.   
     
     
         8 . A calibration system comprising:
 pump equipment including at least one pump whose displacement increases in accordance with increase in a pump command current, the displacement of the at least one pump being a delivery amount per rotation of the at least one pump;   at least one code displayed on a surface of the pump equipment, the at least one code storing actual measurement data of the at least one pump or save location information on the actual measurement data, the actual measurement data indicating an actual relationship between the pump command current and the displacement of the at least one pump;   the control circuitry according to  claim 4 ; and   a mobile terminal that obtains the actual measurement data by capturing an image of the at least one code, generates the calibration data based on the obtained actual measurement data, and transmits the generated calibration data to the control circuitry via wireless communication.   
     
     
         9 . The calibration system according to  claim 7 , wherein
 the at least one pump includes two pumps,   the at least one code includes two codes corresponding to the respective two pumps, and   each code stores the actual measurement data of the corresponding pump or save location information on the actual measurement data.   
     
     
         10 . A calibration system comprising:
 pump equipment including at least one pump whose displacement increases in accordance with increase in a pump command current, the displacement of the at least one pump being a delivery amount per rotation of the at least one pump;   at least one code displayed on a surface of the pump equipment, the at least one code storing actual measurement data of the at least one pump or save location information on the actual measurement data, the actual measurement data indicating an actual relationship between the pump command current and the displacement of the at least one pump;   the control circuitry according to  claim 5 ; and   a mobile terminal that obtains the actual measurement data by capturing an image of the at least one code and that transmits the obtained actual measurement data to the control circuitry via wireless communication.   
     
     
         11 . The calibration system according to  claim 10 , wherein
 the at least one pump includes two pumps,   the at least one code includes two codes corresponding to the respective two pumps, and   each code stores the actual measurement data of the corresponding pump or save location information on the actual measurement data.   
     
     
         12 . The calibration system according to  claim 8 , wherein
 the at least one pump includes two pumps,   the at least one code includes two codes corresponding to the respective two pumps, and   each code stores the actual measurement data of the corresponding pump or save location information on the actual measurement data.