SU1001150A1 - Device for registering moving motor vehicles - Google Patents

Description

The invention relates to instruments for monitoring the parameters of traffic flow on roads, in particular, the intensity and direction of traffic.

A device for recording moving cars is known, comprising two photo sensors connected to the inputs of amplifiers and electromagnetic pulse counters, a car registration unit by their length made as a group of relays whose capacitors are included in the power supply circuit, and the contacts in the electromagnetic pulse counters circuit, moreover, in the capacitor discharge circuit, a compensation unit is included, made in the form of an amplifier, the output stack of which is connected in parallel to the relay windings, the outputs of the amplifiers are connected to the input of the unit register ation autogen anniversary of their lengths 1.

The disadvantage of this device is its complexity.

The closest in technical essence to the present invention is a device for recording moving objects, comprising sensors connected via drivers to the inputs of the direction determining unit, the outputs of which are connected to the inputs of cyj ator, the outputs of which are connected to a reversible counter 2J.

The disadvantage of this device is its complexity.

The purpose of the invention is to control the device.

This goal is achieved by the fact that the device containing the sensors

10 and counters, introduced inverters, O-flip-flop, NAND elements and keys, the output of the first sensor through the first inverter is connected to the first input of the first NAND element and the R input

15 O-flip-flop, the S-input of which is connected through the second inverter with the output of the second sensor, the direct and inverse outputs of the D-flip-flop are connected to the second inputs of the second

20 and the first NAND elements, the outputs of each of which through the corresponding key is connected to the counter.

FIG. shows a function, on the scheme of the device for the registration of moving cars; in fig. 2 is a voltage chart of the device operation cycles.

The device contains sensors consisting of two sources 1 and 2 of modulated light located at a fixed distance from one another on one side of the controlled road and facing against them on the other side of the road two photoreceivers 3 and 4, whose outputs are connected to the inputs of the blocks amplification of the signals of sensors 5 and 6. The outputs of the amplifiers of the signals of the sensors through inverters 7 and 8 are connected to the inputs R and S of the 0-flip-flop 9, and the outputs of the flip-flop 9 through the inputs of the AND-NE elements 10 and 11 are connected to the inputs of the keys 12 and 13 counters 14 and 15 o Moreover, the inputs of the element 11 are connected to the R input and the inverting output of the D flip-flop 9, and the inputs of the element 10 to the S-input and the direct output of the D flip-flop 9. In the initial state the modulated light from sources 1 and 2, respectively, goes to the photodetectors 3 and 4, the outputs of the amplifiers 5 and b .11 have a positive voltage corresponding to the logic level 1, which is inverted into the logic level O by the inverters 7 and 8 and fed to the R and S inputs of the B flip-flop, as well as to the inputs of elements AND-NOT 10 and 11 connected to them. On the inverting and direct outputs there is a 0-flip-flop and 9 we have a logic level 1, which is fed to the second inputs of elements 10 and 11. Since the first inputs of elements 10 and 11 have a logic level O, their outputs have a logic level 1. Transistors (not shown) lock the keys 12 and 13, including counters 15 and 14, the windings of the counters are de-energized (FIG. tact II. When driving in one direction, the car first crosses the beam incident from the source of modulated light 1 to the photodetector 3. The change in light flux is converted by the photoreceiver 3 and amplifier 5 to the logic level O inverted to the level logical 1 by inverter 7 and fed to R input D -trigger and on the input of element 11 connected to it. On the n, the output of trigger 9, on the input and output of the second element 10 connected to it, the level of logic 1 is maintained, and on the inverting output of the trigger and on the input of element connected to it 11 is a logic level O. Trays of keys 12 and 13 are closed by a positive voltage of logic 1 from the outputs of the I-BE 10 and 11 elements, respectively, since their outputs have a logic level O (Fig. 2, bar 2) . Then, the car overlaps the second light beam from the modulated light source 2 to the photodetector 4, the output voltage of the amplifier B appears logic level O, inverted by inverter 8 to logic level 1 and fed to the S input of the trigger 9 and connected to it element 1P, the transistor 13 is closed, and the transistor of the switch 12 opens, since the level of logic O appears at the output of the element 10. A current flows through the winding of the counter 14 (Fig. 2, cycle 3). Then the car leaves the zone of the first light beam, at the R-input of the trigger and at the input of the NAND 11 element connected to it, the logic level O is stored, and the inverting output of the O-flip-flop 9 and the input of the element 11 connected to it 11 logical level 1. The transistor key 13 is closed. At the inverting output of the O-flip-flop 9, a logic level O appears, transmitted to the input element I-NE 10 connected to it, and the output sets a voltage level of logical 1 which closes the key 12 and provides the winding of the counter 14, on the counting drum of which is what corresponds to the passage of one car in a given direction (Fig. 2, bar 4-). . When the car leaves the zone of the second beam from the modulated light source 2 to the photodetector 4 / at the output of the amplifier b, the logic level O appears, the inverter 8 transforms into the logic level 1 and is fed to the S input of the D flip-flop 9 -NON 10, the second input of which receives the logic level O from the direct input of the trigger 9. From the output of the element 10, the key 12 is supplied the level of the logical 1. The key 12 is closed and the winding of the counter 14 is de-energized. At the R input of the trigger and at the input of element I-HE 11 connected to it there is a logic level O, and at the direct output and input of element 11 connected to it there is a logic level 1, thus, at the output of element 11 there is a logic level 1 and the key 13 is closed, the winding of the counter 15 is de-energized (Fig. 2, cycle 1, the right half of the diagram). Next, the car crosses the second beam from the modulated α-light source 1 to the photodetector 3, the output of the amplifier 5 produces a logic level O, is inverted by the inverter 7 into the logic level 1, and fed to the R input of the trigger 9 and the input element 11 connected to it, and on the connected with. the inverting output of the 0-flip-flop 9 input of the ele ment, 11 - the level of logic 1.,

Thus, at the output of the element 11, the logic level O becomes, the key 13 is opened, and the counter 15 is triggered.

The transistor key 12 is closed, since at its base there is a logic level 1 from the output of the element 10, the inputs of which are the logic level 1, from the output of the inverter 8 and a logic level O from the direct output of the trigger 9 (Fig. 2, time 2 ) ..

Upon further movement, the autosmobile leaves zone 1, the beam at the output of inverter 8 appears at a logic level O, arrives at the S input of the O flip-flop and at the input of element 11 connected to It. The R flashing of the D flip-flop maintains the level of logic i , at the inverting output - logic level O, at the forward output of flip-flop 9 logic level 1 appears. Thus, at the outputs of the AND-HEY elements 10 and 11 logic level 1 and transistors of keys 12 and 13 are closed, windings of counters 14 and 15 are de-energized (Fig. 2, step 3).

Then the car leaves the zone of the second beam and the circuit returns to its initial state (Fig. 2, cycle 4).

Introduction to the device of inverters, keys and execution of the block definition

: directions of movement in the form of a D-flip-flop and elements And allowed to simplify the device.

Claims (2)

1. Author's certificate of the USSR 411486, cl. Q 08 s; 1/04, 1972. 2. Authors certificate of the USSR 834731, cl. G 06 M 3/08, 1977 (prototype).