RU148831U1 - DEVICE FOR DETERMINING A VEHICLE SPEED OF A VEHICLE - Google Patents

Abstract

A vehicle speed determination device configured to remotely determine a vehicle speed and identify it using a response radio signal of an identification unit mounted on a vehicle, and comprising a transmitter generating an incident electromagnetic signal, a receiver that receives a response radio signal of an identification unit, a unit determining the vehicle speed, the vehicle identification unit and the control unit I, and the transmitter and receiver are connected to the vehicle speed detection and identification units, which are connected to the control unit, characterized in that the vehicle speed detection unit is configured to determine the vehicle speed in a pulsed manner from the difference in transmission time of the incident electromagnetic signal and receiving the response time of the radio signal.

Description

The utility model relates to the field of measuring technology and is intended to determine the speed of a vehicle with its simultaneous identification using radio waves.

The prototype is a system that implements the known method for determining the vehicle speed according to patent RU No. 2395815, IPC G01P 3/66, 07.27.2010. The vehicle speed determination system includes a vehicle speed determination device on which at least one identification unit is mounted, said device configured to remotely determine the vehicle speed and identify it using at least one response radio signal of the identification node, while the device for determining the speed of the vehicle contains a transmitter forming giving an electromagnetic signal, a receiver that receives a response radio signal of the identification unit, a vehicle speed determination unit, a control unit, the transmitter and receiver of said device being connected to vehicle speed determination and identification units that are connected to the control unit, and the identification unit comprises a series-connected receiver that receives an incident electromagnetic signal, an encoder that encodes data through a trans rtnomu means in response radio signal transmitter which generates a response radio signal.

The known method consists in sequentially detecting a vehicle at two predetermined, spatially spaced points of its intended path of movement using two or more detection sensors installed at these detection points, measuring the vehicle’s travel time between these detection points, and then calculating the vehicle’s speed means and its identification using at least one identification node mounted on the car, while The vehicle is loaded at predetermined points of the proposed trajectory remotely by the presence of response radio signals of the identification nodes, and in the process of detection, pairs of response radio signals from each of the identification nodes are identified, so that the vehicle is detected at the specified points of the proposed trajectory simultaneously with its identification by response signals of the identification node, for which form the radio signals of the survey identification nodes according to a predetermined y schedule regardless of whether the vehicle between the points of detection.

In the prototype, a vehicle moving along a road enters the field of view first of one detection sensor, then another, which ensure its detection. The detection time for each sensor pairs are fixed and then the speed is determined as the ratio of the distance between the detection sensors to the time spent by the vehicle on moving between them. Since the modulation of the response signal of the identification nodes carries information about the vehicle itself, in addition to measuring the speed, demodulation of the response signal and, if necessary, its decoding provides identification of the vehicle itself. Passive or active RFID tags are used as identification nodes.

The disadvantage of the prototype is the inability to measure reliable speed of vehicles simultaneously with their identification, due to the fact that two detection sensors are used to determine the speed of the vehicle, if one of which fails, the speed will not be determined. Once in the zone of measurement and identification, the driver of the vehicle can reduce the speed, and the resulting measurement speed will be unreliable. In addition, the use of two detection sensors makes the measurement process more expensive, making the manufacture of a wearable device impossible.

The objective of the utility model is to provide the ability to measure the reliable speed of vehicles simultaneously with their identification.

The technical result is achieved by the fact that in the vehicle speed determination device configured to remotely determine the vehicle speed and identify it using a radio signal of the identification node mounted on the vehicle and containing a transmitter that generates an incident electromagnetic signal, a receiver that receives the response signal of the identification node, the unit for determining the vehicle speed, the identifier vehicle and control unit, wherein the transmitter and receiver are connected to the vehicle speed determination and vehicle identification units, which are connected to the control unit according to the present utility model, the vehicle speed determination unit is configured to determine the vehicle speed in a pulsed manner the difference in the transmission time of the incident electromagnetic signal and the reception time of the response radio signal.

The essence of the utility model is illustrated using the drawings, where in FIG. 1 shows the principle of determining the speed of a vehicle; FIG. 2 shows an example of a structural diagram of the proposed device for determining the speed of a vehicle, and in FIG. 3 shows an example block diagram of an identification unit mounted on a vehicle.

The following notation is made in the drawings:

1 - a vehicle (for example, a car) moving along the road with a speed of V;

2 - device for determining the speed of the vehicle 1;

3 - incident electromagnetic signal from the device 2 for determining the speed of the vehicle;

4 - identification node mounted on the vehicle 1;

5 - response radio signal of the identification unit 4 (passive or active RFID tag from which the main response radio signal to the vehicle speed determination device 2 comes);

6 - transmitter forming the incident electromagnetic signal 3;

7 - a receiver that receives a response radio signal 5;

8 - unit for determining the speed V of the vehicle 1;

9 - unit identification (determine the number) of the vehicle 1 by the received encoded response radio signal 5 from the identification unit 4;

10 - control unit;

11 - receiver node 4 identification, which receives the incident electromagnetic signal 3;

12 is an encoding device of the identification node 4, which encodes data on the vehicle 1 into a response radio signal 5;

13 - transmitter node 4 identification, which generates a response radio signal 5.

The system for determining the speed V of the vehicle 1 includes a device 2 for determining the vehicle speed on which at least one identification unit 4 is mounted, said device 2 being configured to remotely determine the vehicle speed and identify it using at least one response radio signal 5 of the identification unit 4.

The vehicle speed determination device 2 includes a transmitter 6 generating an incident electromagnetic signal 3, a receiver 7, which receives a radio signal 5 of the identification unit 4, a vehicle speed determination unit 8, a vehicle identification unit 9, and a control unit 10. The transmitter 6 and receiver 7 of the specified device 2 are connected to blocks 8 and 9, respectively, of determining the speed of movement and identification of the vehicle, which are connected to the control unit 10.

The identification node 4 comprises a series-connected receiver 11, which receives the incident electromagnetic signal 3, an encoding device 12, which encodes the vehicle data into a response radio signal and a transmitter that generates a response radio signal 5. response radio signals 5 of at least one identification node 4 used to determine the speed V of the vehicle by the time of arrival of the response radio signal 5 of at least one node 4 identification, relative to the transmission time the electromagnetic signal 3 generated by the vehicle speed determination device 2, the encoding device 12 of the identification unit 4 is configured to generate a response radio signal 5 with a fixed time delay relative to the received incident electromagnetic signal 3.

The difference between the proposed device 2 determine the speed of the vehicle is that the unit 8 for determining the speed of the vehicle is configured to determine the speed of the vehicle in a pulsed manner by the difference in the transmission time of the incident electromagnetic signal 3 and the reception time of the response radio signal 5.

The device for determining the speed V of the vehicle is as follows.

The vehicle 1 (Fig. 1), moving at a speed of V, is equipped with an identification unit 4.

The method for determining the vehicle speed V of the vehicle 1 is to detect the vehicle by the vehicle 2 for determining the vehicle speed V of the vehicle, remotely, by the presence of the response radio signals 5 of at least one identification unit 4 mounted on the vehicle 1, the subsequent identification of the vehicle 1 using at least one response signal 5 of the identification unit 4.

In this case, the response radio signals 5 of at least one identification unit 4 are also used to determine the vehicle speed V by the arrival time of the response radio signal 5 of at least one identification unit 4 with respect to the transmission time of the incident electromagnetic signal 3 generated by the device 2 determine the vehicle speed 1.

The device 2 for determining the speed V of the vehicle 1 with its transmitter 6 (Fig. 2) generates an incident electromagnetic signal 3, which is received by the receiver 11 (Fig. 3) of the identification unit 4. Based on the received incident electromagnetic signal 3, the encoder 12 of the identification unit 4 generates a response signal that contains encoded data about the vehicle 1 (vehicle number, etc.). The transmitter 13 of the identification unit 4 from the signal of the encoding device 12 generates a response radio signal 4, which is received by the receiver 7 of the vehicle speed determination device 2 1. Comparing the signals of the transmitter 6 and receiver 7, block 8 determines the speed V of vehicle 1. Block 9 identifies (determines number) of vehicle 1, decoding the received response radio signal 4. Unit 10 controls the device 2, displays the received data on the speed and number of the vehicle 1, transmits the received data and the central server (in the drawing is not shown). Block 8 determines the speed V of the vehicle 1 in a pulsed manner from the time difference to the transmission of the incident electromagnetic signal 3 and the reception of time t1 of the response radio signal 5:

L = C * (t1-to-dt) / 2,

where L is the distance to the vehicle at time to.

In the system for determining the vehicle’s speed V, the encoder 12 of the identification unit 4 generates a response radio signal 5 with a fixed delay dt relative to the received incident electromagnetic signal 3. Having performed two distance measurements Lo and L2 at times to and t2, block 8 determines the vehicle speed V one:

V = (Lo-L2) / (t2-to).

Thus, the proposed device for determining the vehicle speed provides the ability to measure the reliable speed of the vehicles simultaneously with their identification.

Claims (1)

A vehicle speed determination device configured to remotely determine a vehicle speed and identify it using a response radio signal of an identification unit mounted on a vehicle, and comprising a transmitter generating an incident electromagnetic signal, a receiver that receives a response radio signal of an identification unit, a unit determining the vehicle speed, the vehicle identification unit and the control unit I, and the transmitter and receiver are connected to the vehicle speed detection and identification units, which are connected to the control unit, characterized in that the vehicle speed detection unit is configured to determine the vehicle speed in a pulsed manner from the difference in transmission time of the incident electromagnetic signal and receiving the response time of the radio signal.

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