JPS5935299A - Speeding control system - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to a speed violation enforcement system comprising a speed measurement device and a camera that takes pictures of the data measured by the speed measurement device and of vehicles driving in violation.

First, a conventional system of this kind will be briefly explained using an example of a speed measuring device that utilizes the Doppler effect of radio waves. In the figure.

(1) is a vehicle as the object to be measured, (2) is an antenna for emitting radio waves (3) to the vehicle and receiving reflected waves from the vehicle (1), and (4) is, for example, a Gunn oscillator, etc. 9. Power the antenna (2) using the radio waves from the radio wave source as transmission waves. and a transmitting/receiving circuit for obtaining a difference frequency component between the transmitted wave and the received wave by frequency mixing of the received wave and the transmitted wave received by the antenna (2), i.e., a topar signal (5); (
6) is a counting circuit that measures the running speed of the vehicle (1) from the frequency of the Doppler signal (5); (7) is a speed signal that is the output of the counting circuit (6) and indicates the running speed of the vehicle (1); (8
) is the speed limit setting switch.

(9) is the speed limit which is the output of the speed limit setting switch (8), On is the speed signal (7) compared with the speed limit (9) [-7 speed signal (7) exceeds the speed limit (9) (2) is a data display for numerically displaying the speed signal (7), and (2) is a shutter that opens and closes in response to the alarm signal (11). Data display (2) that displays the measured speed of the vehicle (1)
This is a camera for taking pictures on the same film.

In addition to the speed signal (7), the data display 02 can also display, for example, time, speed limit (9), etc., but here, only the speed signal (7) is displayed.

Further, the spread of the transmitted wave (3) from the antenna (2), that is, the radiation beam, is shown by the shaded area in the figure.

In such a configuration, the counting circuit (6) is first reset by a reset signal (not shown). In this state, the vehicle (1) is within the transmitted wave beam from the antenna (2).
) arrives, the reflected wave is received by antenna (2),
The transmitter/receiver circuit (4) outputs a difference frequency component between the transmitted/received@wave and the received wave, that is, a Doppler signal (5). A counting circuit (6) counts this Doppler signal at a constant sampling rate, and treats the maximum value as the running speed of the vehicle.

The reason why the maximum value is treated as the traveling speed of the vehicle is because the power of one reflected wave varies greatly depending on the shape of the vehicle (1), the position of the vehicle within the transmission beam (3) emitted from the antenna (2), etc. This is because the Doppler signal (5) is subject to distortion.

The speed signal (7) obtained in this way is given to the data display 02 for digital display, and is also given to the comparator αO to be used as the limit speed signal (9) set by the switch (8). compared.

If the speed signal (7) exceeds the speed limit signal (9), an alarm signal αυ is output and given to the camera (to).

When the camera (to) receives this alarm signal (b), the shutter drive mechanism such as a solenoid is activated.7. Open and close the shutter.

As mentioned above, this camera violates the data display (2) and takes pictures of the vehicle in question, and the vehicle and its associated speed are printed in each photo. There is.

Photographs taken in this manner are often used as evidence in speeding enforcement enforcement.

However, only one photo is taken for each speeding vehicle, and no data regarding the situation before and after the photo is taken remains. This invention is based on the L7, which records the driving conditions before and after the above-mentioned photograph.The feature is that a TV camera is added, and the driving condition of the car before and after the photograph is taken with this TV camera. T R(”Vide
o TapeRecorder).

Figure 2 is a system configuration diagram of an embodiment of this invention.
In the figure, aφ is the vehicle (1) K, the TV camera that takes pictures;
(to) is the image signal that is the output of the TV camera α→, and 0 is to process the speed signal (7) and the image signal (to).

Shooting with TV camera 0◆1. An image synthesizer that emphasizes velocity data on the image synthesizer, α force is a synthesized image signal which is the output of the image synthesizer [phase], (110 is the velocity signal (7) as input and 1
．． After this speed signal (7) exceeds a predetermined speed (lower than the speed limit (9)), a recording command is generated that turns on the recording command signal α for a predetermined period of time, e.g., 2 seconds. The device (1) is a VTR that records the 2 composite image signal α as image data and the L5 Doppler signal (5) as an audio signal and 12 when the recording command signal a is on. , TV camera (
The field of view of (b) is set to include the field of view of the camera (to), and is 2. Also, in Figure 2, (1) to (to) are 9
This is the same as shown in Figure 1.

In such a configuration, a speeding vehicle is photographed by a camera as described in FIG.

Meanwhile, as the vehicle (1) approaches the antenna (211C).

The intensity of the received wave increases and the Doppler signal (5) begins to be output, and at the same time the speed signal (7) increases and finally reaches the speed of the vehicle (1), but soon the vehicle (1) starts to output the radiation beam ( 3), the strength of the received wave decreases, the Doppler signal (5) disappears, and the velocity signal (7) becomes zero. This speed signal (7) is also input to the recording command generator [phase], and the rise of the speed signal (7) means that the vehicle (1)
As the camera approaches the antenna (2), the recording command signal α
0 is output. Also, the recording command signal (7) is the speed limit (
9) Since it is turned on at a speed lower than
Prior to shooting with VTR, (1) is Doppler signal (5)
and the composite image signal (11), and continues this recording for a predetermined period of time.

By combining the composite image signal m and the travel signal (5) recorded on the VTRH in this manner and reproducing the VTR (e) at a later date, the recording can be confirmed. Although the image recorded on the VTR (1) cannot be expected to have clearer image quality than the image taken by the camera α1, it is sufficient for confirming the driving condition of the vehicle (1).

As explained above, according to the present invention, the camera (2)
It is possible to record driving conditions before and after photographing a speeding vehicle.

Note that a shutter mechanism can be added to the TV cameras α and ◇ in order to reduce the flow of two images as the TV camera α station. Furthermore, after the recording command signal α field is turned on, the vehicle (])
If the speed exceeds the speed limit (9) f, then
It is also possible to turn off the recording command signal (2) and use V+ to stop or erase recording using VTPI).

In the embodiment, the Doppler signal (5) is also recorded on the VTR screen, but this is not always necessary.

Also, as related data, only the speed signal (7) is used as the image signal (
Although the present invention has been made to overlap with the data (g), it is also possible to use two-time data, etc.

In addition, in the embodiment, an increase in the speed signal (7) was used as a means of detecting the arrival of the vehicle (1) at the antenna (2), but there are various other functions as well. Although a speed measuring device using the Doppler effect of radio waves has been cited as an example, there are various speed sensors such as a tape switch, an optical type, and others.

[Brief explanation of drawings]

FIG. 1 is a system configuration diagram showing a conventional speed violation enforcement system, and FIG. 2 is a system configuration diagram showing an embodiment of the speed violation enforcement system according to the present invention.
(2) is the antenna, (4) is the transmitting/receiving circuit, (5) is the Doppler signal, (6) is the counting circuit, (7) is the speed signal, (8)
is the speed limit setting switch, (9) is the speed limit, QO is the comparison circuit, Q sword is the alarm signal, (L6 is the data display, (
(to) is a camera, (to) is a TV right camera, (to) is an image synthesizer, (to) is a recording command generator, and (e) is a VTR. In the figures, the same or corresponding parts are denoted by the same reference numerals. Agent Shin Kuzuno −

Claims (1)

[Claims] A camera that takes pictures together with a speeding vehicle and a data display device that displays data related to the speeding violation, and a camera that measures the traveling speed of the vehicle, and when the traveling speed does not exceed a preset speed. The speed measuring device is configured to generate a speeding vehicle and a speeding warning signal, and the speed measuring device measures the speed of the traveling vehicle and displays the actual measured value on the data display. At the same time, if the actual measured value exceeds a preset speed, a warning signal is output and the above-mentioned camera photographs the speeding vehicle and the data display on the same film, thereby facilitating speed enforcement. The system includes a TV camera having a field of view that includes the field of view of the camera, and a recording command that turns on a recording command signal prior to outputting an upper warning signal when a traveling vehicle arrives in the measurement area of the speed measuring device. The present invention includes a generator and a recorder for recording the image signal of the TV camera together with the data regarding the speeding violation, and the camera records the speeding vehicle on film. A speed violation enforcement system characterized in that the driving situation of the vehicle before and after the camera captures the image is captured on the recorder together with data regarding the speed violation.