SU726483A1 - Device for measuring the area of electric pulses - Google Patents

Description

(54) DEVICE FOR MEASUREMENT OF PLANTS OF ELECTRIC PULSE SITES

In the device and to the first input of the amplitude discriminator, the second input of the switch connected to the output, the first switch stroke is combined with the second input of the counter and connected to the output of the logic element I, the second input of the switch is connected to the output of the inverting amplifier.

The switching of voltage threshold values is made by the decay of each pulse, and this voltage is zero when the threshold voltage is equal to the amplitude of the measured pulse. In order to achieve an adano measurement error, the magnitude of the threshold voltages can be adjusted by varying the power supply, its electronic voltage, the switch.

The drawing shows a block diagram of a device for measuring a continuous pulse.

The device contains an amplitude discriminator 1, a driver of 2 strobe pulses, a key 3, a quartz oscillator 4, a caterer 5, a differentiating circuit 6, an inverting amplifier 7, a switch 8, a logic element 9.

The device works as follows.

The studied pulses arrive at the first input of the amplitude discriminator 1 with an adjustable response threshold equal to zero in the initial state. From the amplitude discriminator 1, the pulse arrives at the shaper of 2 strobe pulses, 1 of forming square-shaped pulses that go to the control input of the switch 3. At the second input of the switch 3, Offset from the quartz oscillator 4. At the output of the switch 3, the counter 5 counts the number pulses, proportional to the area of the measured pulse. From the output of the imaging unit 2, the strobe pulses also arrive at the differential circuit 6. An impulse from the output of the differentiating circuit 6, formed by a decrease in the pulse, through the inverting amplifier 7, enters the input of the switch 8. A series of these pulses allows successively changing the threshold voltages from zero to amplitude value measured pulse. The duration of the pulse area measurement cycle is determined by the magnitude of the step by which the trigger threshold of amplitude discriminator 1 and the amplitude of the pulse under investigation change. The measurement process ends when the equal or high thresholds of the amplitude discriminator 1 are reached, the amplitudes of the pulses under study. Logic element 9 generates a control pulse in the absence of a pulse at its input from the former 2. The control pulses transfer the electronic switch 8 and the counter 5 to the initial position.

Introduction of a new differentiating circuit element, an inverter amplifier, and an electronic switch of threshold voltages improves the accuracy and speed of the device, eliminating the need for measuring the voltage amplitude of the signal under study in order to set the saw voltage amplitude. An increase in accuracy is achieved due to the synchronous (with the pulse frequency) control of the threshold of the amplitude discriminator and the time constant of the threshold voltage (for the entire duration of the pulse). The possibility of changing the threshold voltage and setting its known value provides an increase in the accuracy to a predetermined value and obtaining information about the amplitude of the measured signal, as well. With this, the number of discrimination cycles, which end when the threshold is equal or exceeded by the threshold voltage of the discriminator of the amplitude of the signal under investigation, automatically changes. Putting the device in the initial state with equal specified voltages provides an increase in speed and at the same time eliminates the need for preliminary measurement of the amplitude of the signal under study, which increases the degree of automation of the measurement process.

Claims (2)

Invention Formula A device for measuring the area of electrical pulses containing a series-connected crystal oscillator, a key and a counter, and an output of an amplitude discriminator, connected to a controllable key input, through which a pulse generator is used, in order to increase accuracy and speed, a differential circuit connected in series is inserted into it and inverting amplifier, the logical element And the comm tator, one of the key inputs is connected to the input of the differentiating circuit and the first input of the logic element I, the second input of which is connected to the input bus of the device and to the first input of the amplitude discriminator, the second input connected to the output of the switch, the first input of the switch is combined with the second input of the counter and connected to the output of the logic element And, the second input of the switch is connected to the output of the inverting amplifier. , Sources of information taken into account in the examination 1. Grznov M. I. The integral method pulse measurements. M., “Owls. radio, 1975, p. 44. 2. USSR author's certificate No. 444122, cl. G 01 R 21/00, 1975.