SU769371A1 - Power measuring device - Google Patents

Description

The angular elevation forelock unit to the signal distributor and to the unit of the angular elevation number, and the counting input of the counter and mpulso are connected to the output of the impulse of the reference frequency, the first output of the signal distributor is connected to the installation inputs of the pulse counter, the second output is c the control input of the valves connected between the output of the counter of the impulses and the information input of the calculator, the third output with the other control input of the key and with the control input of the calculator, and the setter of the "Omer" corner of the boat a sound control ene-ow. to the entrance of the block, forming the corner marks.

In the drawing, a block diagram of a device for measuring power is shown.

The device holds the rotation speed sensor J, the level selector 2, the key 3, the corner elevation unit 4, the corner elevation reference number 5, the signal distributor sig nalo in 6, the generator 7 impulses of exemplary frequency, the counter of impulses 8, gates 9, calculator, ten.

The device works as follows.

Before starting the measurement in; manual by the operator's commands or automatically by the commands of the control unit of the diagnostic measuring system in the setting unit 5 ENTER the number of pulses equal to Lf and determined by the period of the oscillatory component of this engine brand, as well as the number of impulses N (pi 1+ 1 and N (p2 Nfph + i- In the particular case, when the angular speed p. 01 c. Rotation is determined in one period of the next G, - the sensor / frequency / impulses / 1 and, accordingly, 2, and N (p2 A pfe + l, / - the number of periods T. Also manually or automatically into the source axis The engine sets the corner mark formation unit 4, sets the dial 6 to the position corresponding to the pulse number code 1 at its output, and sets the torque setpoint of the level selector 2 corresponding to this engine brand.

Then, with a sharp fuel supply, the engine accelerates to a maximum angular velocity. The level 2 selector, on the basis of the signals from sensor 1, continuously follows the increasing speed of the engine and, when it reaches the set value, generates a pulse at the output. By this impulse, coming to the first control input of the key 3, the latter is unblocked and the impulses from the output of sensor 1, which follow with a period of trace and T, are sent to the counting input of block 4, the threshold of which is at this moment equal to one () For the first name of the pulse coming from the output of the key 3 in block 4, the latter generates a pulse at its output that goes to the control input of the setter 5 of the number of the corner mark and to the input of the signal distributor 6. At the same time, the setpoint code 5 , and on the first exit The distributor 6 appears after it, which sets the counter 8 to its initial zero state.

By the time of arrival of the pulse on

input block 4 in the counter 8, the input of which

pulses are coming from the generator 7 output

frequency / o will be fixed number

Ml pulses equal to

(one)

The number NI is inversely proportional to the angular rotational speed of the motor shaft (Oi at the initial measurement area. At the moment of arrival N (fi-T0 of the impulse, flea 4 generates a pulse, through which a number code is set at the output of setpoint 5 and the signal distributor 6 generates a pulse at its second output, arriving at the control input of the valves 9. (In this case, the valves 9 are unlocked and the code from the output of the pulse counter 8 is read into the memory of the calculator 10.

By the time of arrival of the impulse to the input of block 4, the counter 8 will be fixed. NUM Nh pulses equal to

Lo, G-1

(2)

 S T is an NH number proportional to time.

The 7-FY of the motor passing through the process of its acceleration is the angle of FA, equal to or multiple to the period of the oscillatory component of the transition process, expressed in units of angular magnitude. AT

the moment of the pulse pulse by the signal of the block 4 at the output of the setting device 5 is set the code of the number N (p2y and by the signal appearing at the second output of the distributor 6, the valves 9 are unlocked again and

The code Nh. is rewritten into the calculator 10. After the time required to confidently rewrite the code of the pulse counter S to the calculator 10, a signal appears at the first output of the signal distributor 6,

setting counter 8 to the initial zero state.

iB result by the time of arrival of the Ntfz-ro impulse to the input of block 4, the number of N pulses will be recorded in counter 5

equal to

N, + C

N, f, S Ti.

Claims (2)

(3) N, Number L / 2 is inversely proportional to the angular velocity of rotation of the engine shaft 0) 2 in the final part of the acceleration intention. At the moment of arrival of an impulse to the signal C of the output of block 4, setpoint 5 is set to “a similar state, and the signal at the second output of the distributor 5 to the calculator 10 will read the code of the number N2. 4eipe3 time required to confidently rewrite the code of counter 8 into calculator 10, a signal appears on the third output of the signal distributor i5, which blocks the second control input 1KLUCH 3 and simultaneously generates a command to calculate the calculator 10. (Taking into account the expressions (1), (2) and (3) the expression for calculating the power takes the form L. C is a coefficient proportional to / 0. The values of NI, Nk and are variables for calculator 10, and the value of C is constant for The engine and engine brands are inserted into the computer 10 before the -n The introduction of a block for forming angular marks, preset number of angular mark, signal distributor, generator of abrasive frequency and gates favorably distinguishes the proposed device from the known ones, as it allows to improve the accuracy of measurement neither the oscillatory component of the transient process on the measurement results, without distorting the transient process of engine acceleration, and, secondly, lowering the error and discreteness. The first effect is achieved by the fact that the measurement time in the proposed device equals or shortens the period of the oscillatory component of the transient process, and the angular velocities are measured at the beginning and end of the measurement section and carried out without filtering the transient process. The reduction of the discreteness error is achieved by the fact that the pulse counter is filled by the generator of a generator of a frequency pattern, the magnitude of which can be made quite large. Apparatus of the invention for measuring power, for example, internal combustion engines, comprising a rotational speed sensor, the output of which is connected to the signal inputs of the key and its control input via a level selector, a pulse counter and a calculator, in order to improve the measurement accuracy , the unit for the formation of angular marks, the setpoint adjuster of the angular mark, (signal distributor, pulse generator of exemplary frequency and valves, are entered into it, the output of the key is connected through the shaping unit the angular marks to the signal distributor and to the setpoint generator — the angular elevation numbers, and the counting input of the counter and pulses are connected to the output of a pulse frequency generator of exemplary frequency, the first output of the signal distributor is connected to the set input of the pulse counter, the IG output is from the control input of the gates connected between the output of the pulse counter and the information input of the calculator, the third output with another control input of the key and with the control input of the calculator, and the output of the setpoint — the number of the corner mark — is connected to the control yuschemu entry block forming angular marks. Sources of information taken into account during the examination: 1. Author's certificate No. 344068, cl. G -01 L 23/08, 07.24.69. 2. (US Patent No. E581561, Cl. G 01 M 15/00, 10.27.69.