An automatic analyzing apparatus capable of eliminating static electricity charged in a specimen container at a specimen dispensing position provided. The automatic analyzing apparatus includes a dispensing mechanism having a probe that aspirates a liquid and an arm that holds the probe, and a static eliminator having a generation source of neutralizing ions and a neutralizing ion blowing mechanism for blowing the neutralizing ions generated in the generation source to a target, which are provided in the dispensing mechanism.

A system and process for determining and analyzing surface property parameters of a substance based on kinetic method is provided. The system comprises a sample processing system and a detection system. The sample processing system includes a reactor (3), a collector for liquid to be tested (5), and a container for liquid to be tested (6). The detection system includes a detecting electrode (13), a concentration and activity operator, a kinetic data processor, a surface property operation module, and a result output module. The process comprises: having the substance to be tested to be treated with an electrolyte solution, measuring activity of liquid to be tested upon reaction at a pre-set time interval, and processing with the kinetic data processor and the surface property operation module, so as to obtain surface property parameters of the substance to be tested. The present invention adopts kinetic method of ion exchange to overcome the issues associated with long reaction equilibrium time, not easy to determine equilibrium and not easy to accurately determine the value of m. Five parameters of the substance surface property can be calculated with only intercept and gradient of the linear regression equation obtained from the kinetic data, and the total amount of surface charge can also be directly determined.

A charge potential distributed over a vehicle body resulting from the contact, separation, and friction between a tire and a road surface is detected by a detecting unit provided with a sensing electrode that is disposed on the external surface of the vehicle body, a reference electrode that is disposed apart from the external surface of the vehicle body with a space therebetween, and a sensor amplifier that senses a potential between the sensing electrode and the reference electrode as a signal and amplifies the signal. And the amplitude of the charge potential detected by the detecting unit is monitored by a data processing unit, thereby making it possible to accurately identify not only the state of the road surface but also an internal pressure state of the tire, a wear state of the tire, and the like during vehicular travel.

A charge potential distributed over a vehicle body resulting from the contact, separation, and friction between a tire and a road surface is detected by a detecting unit provided with a sensing electrode that is disposed on the external surface of the vehicle body, a reference electrode that is disposed apart from the external surface of the vehicle body with a space therebetween, and a sensor amplifier that senses a potential between the sensing electrode and the reference electrode as a signal and amplifies the signal. And the amplitude of the charge potential detected by the detecting unit is monitored by a data processing unit, thereby making it possible to accurately identify not only the state of the road surface but also an internal pressure state of the tire, a wear state of the tire, and the like during vehicular travel.

A paper feed roller including an elastic layer composed of thermosetting polyurethane containing a plasticizer, wherein an amount of the plasticizer is within a range of 10 to 50 pts. mass based on 100 pts. mass of the thermosetting polyurethane, and a surface residual charge on the elastic layer is within a range of 90 to 170 V. The surface residual charge is a value determined by single-point measurement of a surface potential of the elastic layer. The measurement includes rotating the paper feed roller in a circumferential direction, electrifying the surface of the elastic layer with a corotron while rotating the paper feed roller, and measuring the surface potential at a center point on the paper feed roller in a roller axis direction in a position where the paper feed roller is rotated by 90 degrees from a position where the surface of the elastic layer is electrified.

A paper feed roller including an elastic layer composed of thermosetting polyurethane containing a plasticizer, wherein an amount of the plasticizer is within a range of 10 to 50 pts. mass based on 100 pts. mass of the thermosetting polyurethane, and a surface residual charge on the elastic layer is within a range of 90 to 170 V. The surface residual charge is a value determined by single-point measurement of a surface potential of the elastic layer. The measurement includes rotating the paper feed roller in a circumferential direction, electrifying the surface of the elastic layer with a corotron while rotating the paper feed roller, and measuring the surface potential at a center point on the paper feed roller in a roller axis direction in a position where the paper feed roller is rotated by 90 degrees from a position where the surface of the elastic layer is electrified.

A device for measuring current by means of integration, includes a first operational amplifier connected as an integrator, and a second operational amplifier connected as an original current generator which can compensate for leakage current in the circuit measurement state and reset the Q0 charge of the integration capacitor in the reset state.

A device for measuring current by means of integration, includes a first operational amplifier connected as an integrator, and a second operational amplifier connected as an original current generator which can compensate for leakage current in the circuit measurement state and reset the Q0 charge of the integration capacitor in the reset state.

A method for detecting the position of the mass center of a passing-through beam of electric charges in a duct, having a passage section with a plurality of detection faces directed thereto is presented. The method includes: arranging couples of detecting elements, so that each couple detects a space area divided into two half-areas by an intermediate plane between the detecting elements of the respective couple; obtaining, from each detecting element, a signal thereby produced representing the distance thereof from the mass center to be detected; comparing the signals produced by each detecting element, by obtaining a digital signal showing the greater proximity of the mass center to one of the detecting element of the couple; and composing the digital signals produced by the couples of detecting elements, by identifying the cross-section of the beam of electric charges to which the mass center of the beam electric charges belongs.

A method for detecting the position of the mass center of a passing-through beam of electric charges in a duct, having a passage section with a plurality of detection faces directed thereto is presented. The method includes: arranging couples of detecting elements, so that each couple detects a space area divided into two half-areas by an intermediate plane between the detecting elements of the respective couple; obtaining, from each detecting element, a signal thereby produced representing the distance thereof from the mass center to be detected; comparing the signals produced by each detecting element, by obtaining a digital signal showing the greater proximity of the mass center to one of the detecting element of the couple; and composing the digital signals produced by the couples of detecting elements, by identifying the cross-section of the beam of electric charges to which the mass center of the beam electric charges belongs.