SU1451754A1 - Arrangement for registering the time of presence of vehicles in monitored zone - Google Patents

Abstract

The invention relates to the field of traffic control and can be used in automated traffic control systems. The purpose of the invention is to improve the accuracy of the device. The goal is achieved by the fact that when a vehicle enters a controlled area by sequentially triggering threshold element 3 (or 4), element OR 14 and switch B of switch 5, the feedback circuit containing feedback amplifier 2 is broken, the time setting resistors 9, 10 and capacitor 11. At the same time, a voltage level is maintained at the input of analog converter 1; corresponding to the voltage level of the capacitor 11 in the absence of vehicles in the controlled area. 3 il. (L

Description

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The invention relates to traffic management and can be used in automated traffic control systems. with

The purpose of the invention is to increase the accuracy of the device.

FIG. 1 is a block diagram of the device; in fig. 2 and 3 are analog converter circuits; examples 10;

The device contains an analog converter 1, feedback amplifier 2, threshold elements 3 and 4, switch 5, executed in the form of 15 keys 6–8, time zadadochie resistors 9 and 10, storage capacitor 11, differentiating elements 12 and 13, element OR 14 .

Analog converter 1 is connected from the excitation circuit 15 of the sensing element, sensing element 16, rectifier 17, and differential amplifier 18.

therefore, after establishing the analogue converter 1 to the initial state, the threshold element 3 is reset, giving a signal to the input of the element OR 14. The signal from the output of the element OR 14 opens the switch 8 key of the mutator 5, which connects the time of the master circuit. resistors 9 and to and a storage capacitor 11, to the output of feedback amplifier 2. From this point on, the time delayed output of switch 5, whose value is determined by RC time constant — master circuit time R9R10C11, enters the control circuit of analog converter 1. All slow changes in output voltage of analog converter 1 are compensated for by the control circuit.

When vehicles pass through the controlled area at the output of the analog converter 1 through the Device, a pulse is generated that can arrive after the analog converter 1 is reset, threshold element 3 is reset, giving a signal to the input of the element OR 14. Signal the output of the OR 14 element opens the switch 8 of the com-, mutator 5, which connects the time of the master circuit, consisting of the timing of the setting resistors 9 and to and the storage capacitor 11, to the output of the feedback amplifier 2. From this point on, the time delayed output of switch 5, whose value is determined by RC time constant — master circuit time R9R10C11, enters the control circuit of analog converter 1. All slow changes in output voltage of analog converter 1 are compensated for by the control circuit.

When passing vehicles through the controlled area at the output of the analog converter 1 to

at once.

When the power source is turned on, the output of the analog converter 1 is set to a high level voltage, which triggers the triggering of the threshold element 3, which outputs the signal to the input of the OR element 14. The output signal of the OR element 14 is fed to the control input of the switch 8 key 5. At the same time, the key 8 closes, disconnecting the time, the driving resistor 9 from the time of the starting circuit, consisting of the time of the pushing resistor 10 and the storage capacitor 1 1.

At the same time, when the power is turned on, the output of the differentiating element 12 generates a pulse arriving at the control input of the switch 6 of the switch 5, which at the same time connects the master circuit consisting of the time of the master resistor 10 and the storage capacitor 11 to the output of the feedback amplifier 2.

After the time interval, determined by the constant time of the master circuit, the analog converter 1 is reset, and on its output, only a certain interval in the control input of the control circuit appears on the control input of the converter 1.

30 chains. During this time, the threshold element depends on the polarity of the pulse). Output output element

35 of the element OR 14, which disconnects mutator 5 with a signal, disconnecting the amplifier 2 of the feedback circuit of the analog circuit

40 bodies 1. At cumulative 11, the level is maintained at an appropriate level on it in the absence of vehicles in the control zone.

45 The driving area of the vehicle of the sensing zone of the sensor and the threshold elements 3 are cast into the initial state through the key 8 to the control circuit of the analogue picker 1.

When you install the device state. Using it to reset the operation of the device

50

A voltage similar in magnitude to 55 is similar to that described.

to the reference voltage HonofiH The threshold voltage of the threshold element 3 is chosen above the output voltage level of the analog converter 1,

Claims (1)

Formula images A device for detecting the presence of a transport drink to the control input of the analog converter 1 only after a certain time interval has expired due to the presence of the master circuit in the control circuit. During this time, the threshold element 3 or 4 has time to work (depending on the polarity of the incoming pulse). The output signal of the threshold element is fed to the input 5 of the OR 14 element, which by its output turns off the key 8 of the switch 5, thereby disconnecting the output of the feedback amplifier 2 from the control circuit of the analog transducer 0 of the body 1. A voltage level corresponding to the voltage level at the storage capacitor 11 is maintained at the absence of vehicles in the controlled area. After the vehicles exit from the controlled area of the sensing element, the threshold elements 3 and 4 are reset and connected via the switch 8 key 8 to the control circuit of the analog converter 1. When the device was set to its original state using an external reset signal, the device was operated Invention Formula Device for determining the time of presence of vehicles 3 zone in the monitored zone, containing an analog converter, the output of which is connected to the first inputs of the first threshold element and a feedback amplifier, the output of which is connected to the first output of the first time of the setting resistor, the second input of the feedback amplifier is the device reference input, switch, the second time master resistor, the first output of which is connected to the input of the analog converter and the first lining of the storage capacitor, the second lining of which is connected to the zero potential bus, you od first threshold element is a first output device, characterized in that, in order povsheni precision devices, it introduced a second threshold element EARS element, two differentiating element, and the switch is in the form of three keys, the outputs koto145 .ryh are merged and connected to the second 25 house reset device. srig.2 t / yrrp. 50 Compiled E.Olenin Editor E.Kopcha Tehred M.Didyk Proofreader M.Demchik Order 7085/50 Circulation 5.18 BHHiiira State Committee for Inventions and Discoveries at the State Committee on Science and Technology of the USSR 113035, Moscow, Zh-35, 4/5 Raushsk nab. 1754 the output of the second setpoint resistor, the output of the analog converter is connected to the first input of the second g threshold element, the output of which is the second output of the device, the second inputs of the threshold elements are the setting inputs of the device,. the output of the feedback amplifier is connected to the information inputs of the first and second keys, the second output of the first time of the master resistor is connected to the information input of the third key, the outputs of the first and second differential elements are connected to the control inputs of the first and second keys, respectively the threshold elements are connected to the inputs of the OR element, the output of which is connected to the control input of the third key, the input of the first differentiating element is the installation input of the device, the input is the second differentiating element is. At Rsrieh. Subscription