SU796869A1 - Device for simulating neuron of oculomotor center - Google Patents

Description

(54) DEVICE FOR MODELING THE NEURON OF THE GAS-MILLING CENTER

one

The invention relates to bionics and is intended for use in devices for contour scanning in systems for recognizing visual images, and can also be used as a source for obtaining pseudo-random numbers and in group psychology experiments as a device whose given equilibrium state is achieved by coordinated input signals.

A device for simulating a neuron is known, which contains resistors, a threshold element, adders, elements, NOT, elements OR l.

A disadvantage of the known devices is the low accuracy of the simulation.

The closest in technical essence to the present invention is a device containing frequency converters to voltage, an adder voltage to frequency converter, a comparison unit, a pulse shaper 2.

A disadvantage of this device is the low accuracy of the simulation.

The purpose of the invention is to improve the accuracy of modeling.

The goal is achieved by the fact that a device for modeling a neuron, an oculomotor center containing the first and second groups of frequency converters to voltage, the outputs of which are connected to the inputs of the adder, the output of which is connected to the first input of the block. the first control frequency converter to voltage, the output of the comparison unit is connected to the input of the voltage to frequency converter, the output of which is connected to the input of the pulse former, additionally introduced delay line, the first and .vtoroy

0 keys, the second and third control voltage frequency converters to voltage, the output of the pulse shaper connected to the information inputs of the first and second keys, the control inputs of which are connected respectively to the outputs of the second and third control converters frequency to voltage, the output of the first key connected to

0

The first input of the first group of frequency converters to the voltage of the first group, the remaining inputs of which are in the first group of information inputs of the device, the output of the second key through the delay line is connected to the first input of the frequency converters to the voltage of the second group, the steel inputs of which are The inputs of the second and third frequency control converters to the voltage are the control inputs of the device, the outputs of the pulse shaper and the delay lines are corresponding The first and second inputs of the device.

The proposed device is shown in the drawing.

The device contains frequency converters 1, 2, 3, 4 and 5 to voltage, adder 6, comparison block 7, voltage to frequency converter 8, pulse shaper 9, keys 10 and 11, delay line 12.

The device works as follows.

When a device simulating a neuron with a pulse frequency f, arrives at the exciting input 2 of the device, the corresponding frequency converter converts the latter into a voltage U proportional to the frequency of the input signals. If the signals are sent simultaneously to several inputs of the exciting and brake devices, then the outputs of the transducers will have a voltage correspondingly proportional to the pulse frequency of the input signals. However, to start the device, to obtain background activity, the presence of a signal at one of the exciting inputs is sufficient. The voltage from the transducer outputs is supplied to the corresponding non-inverting and inverting inputs of the adder 6, where the sum of the voltage supplied from the transducer outputs occurs. The voltage from the output of the adder is fed to the first input of block 7 in comparison with the Dissolved value of the Eltsen, to the second input of which voltage is supplied from the output of converter 4 as the reference voltage that sets the lower threshold. At the same time, depending on the frequency of the signals at the input of the converter 4, the lower threshold of the neuron varies, which makes it possible to quickly control the sensitivity of the device to the input signals. The comparator unit has a predetermined saturation level, above which the output voltage of the comparator unit does not rise. The voltage at the output of comparator unit 7 controls the frequency of the voltage-to-frequency converter 8. Then the pulses from the output of the converter B are fed to the input of the imaging unit 9 output pulses and from the output of the latter to the output of the device. From the output of the device through the switch 10, the normal position of which is open, pulses arrive at one of the exciting inputs 9, the weight of which is greater than one (1.1 or 1.05), and therefore the frequency of the pulses at the output of the device begins to increase. until the voltage at the output of the comparison unit reaches the level of the expression, and therefore, at the output of the device, the pulse frequency will reach the stipulated limit. At the same time, the pulse sequence from the output of the neural-like element through another key 11, whose normal position is open, and the delay line 12 through time t, due to the characteristic of the delay line 12, arrive at the brake input 3 of the device. In this case, the weight of the brake input is specified with a significant excess of one (for example, 1.8). as a result, over time t, the total sum of the voltage applied to the inverting inputs of the adder 6 will exceed the voltage applied to the non-inverting inputs, and the output signals of the device will stop. If signals continue to flow to the exciting inputs of the device, the described driving and braking cycle is repeated. The device, due to the presence of new elements and the connections between them, makes it possible to increase the accuracy of modeling, which makes it possible to use it in devices for modeling the oculomotor center in blocks of contour copying in pattern recognition systems.

Claims (2)

Invention Formula A device for simulating a neuron of the oculomotor center, containing the first and second groups of frequency converters to voltage, the outputs of which are connected to the inputs of an adder, the output of which is connected to the first input of the comparator unit, the second input of which is connected to the output of the first control converter of the voltage to voltage, output The comparison unit is connected to the input of a voltage-to-frequency converter, the output of which is connected to the input of a pulse shaper, characterized in that, in order to improve the accuracy of the model In addition, a delay line ,, the first and second keys, the second and third control frequency converters to voltage are added to the device, and the output of the pulse shaper is connected to the information and inputs of the first and second keys, the control inputs of which are connected respectively to the outputs of the second and The third control frequency converters to voltage, the output of the first key is connected to the first input of the first group of frequency converters to the voltage of the first group, the remaining inputs of which are primary matsionnrs group information input device, the second switch output via a delay line coupled to the first input of frequency-to-voltage converters of the second group, the other inputs of which are the second group of informational -G 7 / device inputs, the inputs of the second and third control voltage to voltage converters are the control inputs of the device, the outputs of the pulse shaper and the delay lines are respectively the first and the outputs of the device. Sources of information, are one in consideration in the examination 1. USSR author's certificate number 429435, class .. G 06 G 7/60, 1974. 2. Authors certificate of the USSR 647698, cl. G About G 7/60, 15.02.79 (prototype).