Device for monitoring mean operating conditions
First Claim
1. A mean rating monitor comprising two input circuits delivering signals which respectively represent first and second physical quantities which vary conjointly, and processing means for determining continually the rate of change of one of the physical quantities relative to the other, the improvement comprising the first input circuit being adapted to emit successive pulses, each indicative of a predetermined quantum variation in said first physical quantity from the preceding pulse, the second input circuit comprising an integrating meter provided to contain a varying instantaneous total as the second physical quantity, the general incrementation rate of said integrating meter being much faster than the general rate of the pulses emitted by the first input circuit, and the processing means comprising a group of stores and an associated store control member,said control member transferring a predetermined portion of the instantaneous total from the meter into one of the stores, in response to each pulse emitted by the first circuit while eliminating the oldest total registered in the stores, and a subtractor which is excitable so as to supply the difference between a recent total contained in the integrating meter or one of the stores and a former total contained in one of the stores, the quantity available at the output of the subtractor representing each time the mean rate of change of the second physical quantity as a function of the first physical quantity.
0 Assignments
0 Petitions
Accused Products
Abstract
The invention relates to rating monitoring devices.
A first circuit emits a pulse for each centiliter (cl) of fuel consumed by a vehicle. A second input circuit emits a pulse for each meter travelled, the pulses being accumulated in a count meter. A store circuit stores a certain number of values previously contained in the count meter at the moment of the preceding pulses of cl consumed. Information about the mean distance travelled per 10 cl of fuel is obtained by producing the difference between the content of the count meter or that if the first register in a register battery, and the content of the last register of the battery. A divider allows this information to be converted into mean consumption per 100 km, this consumption being displayed in a display device.
This invention finds application, in particular, to car.
-
Citations
10 Claims
-
1. A mean rating monitor comprising two input circuits delivering signals which respectively represent first and second physical quantities which vary conjointly, and processing means for determining continually the rate of change of one of the physical quantities relative to the other, the improvement comprising the first input circuit being adapted to emit successive pulses, each indicative of a predetermined quantum variation in said first physical quantity from the preceding pulse, the second input circuit comprising an integrating meter provided to contain a varying instantaneous total as the second physical quantity, the general incrementation rate of said integrating meter being much faster than the general rate of the pulses emitted by the first input circuit, and the processing means comprising a group of stores and an associated store control member,
said control member transferring a predetermined portion of the instantaneous total from the meter into one of the stores, in response to each pulse emitted by the first circuit while eliminating the oldest total registered in the stores, and a subtractor which is excitable so as to supply the difference between a recent total contained in the integrating meter or one of the stores and a former total contained in one of the stores, the quantity available at the output of the subtractor representing each time the mean rate of change of the second physical quantity as a function of the first physical quantity.
-
4. A mean rating monitor according to 1 wherein the stores are arranged in a single shift register and each pulse from the first input circuit controls the advance of the content of this single register by a predetermined number of steps, as well as the transfer of the content of the integrating meter into the first stages of the single register.
Specification