JPH0438310Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to a radio wave detector that detects radio waves reaching a vehicle and issues a notification according to the strength of the radio waves.
In particular, the present invention relates to an alarm circuit testing device for a radio wave detector capable of confirming an alarm in an audio circuit that can notify the alarm by sound.

[Conventional technology]

The following method is provided as one method for detecting the speed of a traveling vehicle outside the vehicle. This is an application of the Doppler effect, which irradiates a vehicle with microwaves, detects the reflected waves, and measures the speed of the vehicle based on the relationship between the frequency of the reflected waves and the speed of the vehicle. This is what I did. Thereby, the speed of the vehicle can be easily measured from a remote location.

A radio wave detector is a device that detects this microwave and displays an audible and luminous display to detect that the speed of the vehicle described above is being detected. By the way, since the radio wave detector cannot identify microwaves, it naturally issues an alarm when it receives microwaves emitted from a device that uses microwaves of the same frequency as the speed measuring microwave. Such microwaves are emitted from, for example, automatic doors installed at building entrances and exits, vehicle passing detectors, etc., and therefore radio wave detectors frequently issue alarms in urban areas. In this case, the purpose of the radio wave detector cannot be achieved.

Therefore, a radio wave detector has been proposed that does not issue unnecessary alarms when there is no need to detect the microwaves.

This radio wave detector has a radio wave detection part that detects radio waves reaching the vehicle and issues a notification according to the strength of the radio waves, and a radio wave detector that detects the speed of the vehicle and compares it with a set standard speed. The speed detecting section causes the radio wave detecting section to issue an audio and display notification only when the speed is equal to or higher than a reference speed. The speed detection section performs analog processing from detecting the speed signal to comparing it with a set reference speed.

According to such a radio wave detector, when the speed of the vehicle is below the reference speed, the speed detection section turns off the power to the radio wave detection section, so that the radio wave detection section does not issue an audible or display notification, and the speed detection section turns off the power to the radio wave detection section. Only when the speed exceeds , the radio wave detecting section makes an audible and visual notification.

[The problem that the idea attempts to solve]

By the way, when checking the acoustic notification of the above-mentioned radio wave detector at a store or the like, the following procedure is used.
That is, a microwave transmitter was prepared, and the microwaves emitted by the microwave transmitter were applied to a radio wave detector, thereby confirming the acoustic alarm of the radio wave detector.

However, although the radio wave detector described above has a function of changing the sound according to the microwave intensity, when tested using the method described above, the sound when the microwave intensity is the strongest is The drawback was that it could only be confirmed. In addition, by using an attenuator to change the intensity of the microwave and applying it to the radio wave detector,
Another method is to confirm that the sound changes depending on the intensity of the microwave. However, in the case of microwaves, the attenuator is very expensive and requires special expertise to handle, so such a method has not been practical.

The present invention has been made in order to eliminate the above-mentioned drawbacks, and it is an object of the present invention to provide an alarm circuit testing device for a radio wave detector that can easily confirm that the sound changes depending on the intensity of microwaves.

[Means for solving the problems]

In order to achieve the above object, the radio wave detector alarm circuit testing device according to the present invention includes a radio wave detection unit that detects radio waves reaching the vehicle and issues a notification according to the strength of the radio waves, and a radio wave detection unit that detects the speed of the vehicle. , a speed detection section that compares the vehicle speed with a set reference speed and causes the radio wave detection section to issue a notification only when the speed of the vehicle is equal to or higher than the reference speed, the radio wave detection section comprising: It is equipped with an audio circuit capable of outputting an alarm by voice and a test command input means, and when a command is inputted by the test command input means,
The present invention is characterized in that the audio circuit is configured to operate.

[Effect]

According to the alarm circuit testing device for a radio wave detector of the present invention, the radio wave detection section is equipped with an audio circuit capable of outputting an alarm in audio, and a test command input means,
Since the audio circuit is operated when a command is input by the test command input means, handling is simple and the audio warning can be confirmed without requiring any special equipment.

〔Example〕

Hereinafter, embodiments of the present invention will be described based on the drawings.

FIG. 1 is a block diagram showing an embodiment of a radio wave detector according to the present invention.

In FIG. 1, a radio wave detector 1 includes a radio wave detection section 2 and a speed detection section 3.

The radio wave detection unit 2 is a circuit that detects radio waves reaching the vehicle 4 and provides notification according to the intensity of the radio waves, and is composed of the following elements. That is, the radio wave detection section 2
is a microwave antenna (microwave antenna) 20, a high frequency amplification circuit 21, a detection circuit 2
2. Low frequency amplification/interface circuit 23, analog/digital converter (AD converter) 24, control circuit 25, voice synthesis circuit 26, low frequency amplification circuit 27, speaker 28, level meter 29, test command input means It is equipped with a test switch TS and an audio changeover switch AS. In addition, the audio circuit is
It consists of a voice synthesis circuit 26, a low frequency amplification circuit 27, and a speaker 28. Further, the alarm circuit includes the audio circuit and a level meter 29.

Here, the control circuit 25 is composed of a microprocessor, ROM, RAM, input/output interface, etc., and performs control operations based on a program stored in the ROM. The control circuit 25 is configured to detect whether microwaves are received by monitoring the output of the low frequency amplification/interface circuit 23. Further, the control circuit 25 is configured to obtain the microwave intensity via the AD converter 24 when there is an output from the low frequency amplification/interface circuit 23. The control circuit 25 drives a level meter 29 according to the intensity of the microwave, and also drives a voice synthesis circuit 26 to output a predetermined acoustic warning from a speaker 28. Test switch, which is a means of inputting test commands
TS is for testing the audio circuit including the audio synthesis circuit 26 and the alarm circuit consisting of the level meter 29, and when turned off, the control circuit 25
becomes a radio wave monitoring operation, and when turned on, the control circuit 25
is the operation to test the audio. The audio changeover switch AS switches the sound output from the audio synthesis circuit 26 between a buzzer sound and a voice.

The speed detection unit 3 detects the speed of the vehicle 4, compares the vehicle speed with a set reference speed, and causes the radio wave detection unit 2 to issue a notification only when the speed of the vehicle is equal to or higher than the reference speed. . This speed detection unit 3 takes in ignition noise 41 superimposed on a DC power supply circuit including a battery 40 of the vehicle 4, forms pulses from this ignition noise 41, counts the pulses, and calculates the speed of the vehicle. It is structured in such a way that it can be considered as such, and consists of the following elements. That is, the speed detection section 3 includes a detection amplification section 30, a filter circuit 31, an interface circuit 32, a speed processing circuit 33, and an operation status indicator light 3.
4. A reference speed setting switch 35 is provided. Here, the speed processing circuit 33 consists of a microprocessor, ROM, RAM, input/output interface, etc. The speed processing circuit 33 operates according to a program stored in the ROM, and includes a counting means for digitally counting the speed of the vehicle, a setting means for setting a reference speed, and a speed processing circuit 33 for calculating the speed from the counting means. Comparison means for comparing the vehicle speed with the reference speed of the setting means is realized, and by the reference speed setting command given from the reference speed setting switch 35, the vehicle speed counted by the measuring means at the time of the command is set as the reference speed to the setting means. It is now configurable. Further, the operating status indicator light 34 includes a light emitting diode 34R that emits red light and a light emitting diode 34G that emits green light. The speed processing circuit 33 lights the light emitting diode 34R in red when the reference speed is not set, lights the light emitting diode 34G in green when the vehicle speed is equal to or higher than the reference speed, and lights the light emitting diode 34G in green when the vehicle speed is less than the reference speed. It is designed to blink green.

The operation of the embodiment configured as described above will be explained.

FIG. 2 is a flowchart shown to explain the operation of the above embodiment.

First, turn on the power. Next, control circuit 2
5, it is determined whether a test switch (test SW in the figure) TS, which is a test command input means, is on (step 100). When this test switch TS is on (step 100), the control circuit 25
Move to the test program (step 101). This can be realized by the control circuit 25 issuing a command to the voice synthesis circuit 26 at regular intervals to change the voice. At this time, the level meter 29 for the intensity of the microwave corresponding to the sound is also lit. Then, when all the voices are finished (step 101), the control circuit 25 again turns on the test switch.
It is determined whether the TS is off (step 102), and if it is on, the process returns to step 100), but if it is off, the process moves to step 103. On the other hand, if the control circuit 25 determines in step 100 that the test switch TS is turned off, it executes the radio wave detection program (step 103). As a result, the radio wave detection section 2
becomes normal radio wave detection operation. Then, the control circuit 25 determines whether the test switch TS is on or not (step 104). If the test switch TS is off, the control circuit 25 returns to step 103 and performs radio wave detection operation.
Also, if the test switch TS is on, step 101
to move to.

Because it operates in this way, it is easy to check changes in acoustics depending on the intensity of microwaves.

In this embodiment, the audio circuit of the radio wave detection section 2 can be easily checked by turning on the test switch TS.

Therefore, an acoustic notification test can be performed without requiring any special equipment.

[Effect of idea]

As described above, according to the present invention, the audio circuit of the radio wave detection section can be easily tested by commands from the test command input means, and the acoustic notification test can be performed without requiring any special equipment. It has the effect of being able to.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the present invention, and FIG. 2 is a flowchart for explaining the operation of the embodiment. 1...Radio wave detector, 2...Radio wave detection section, 3...
Speed detection unit, 4...vehicle, 25...control circuit,
TS...Test switch (test command input means), 2
6...Speech synthesis circuit, 27...Low frequency amplification circuit,
28...Speaker.

Claims (1)

[Scope of utility model registration request] A radio wave detection unit detects radio waves reaching the vehicle and provides notification according to the strength of the radio waves, and a radio wave detection unit detects the speed of the vehicle, compares the vehicle speed with a set reference speed, and determines whether the vehicle speed is higher than the reference speed. In a radio wave detector comprising a speed detection section that allows the radio wave detection section to issue a notification only occasionally, the radio wave detection section is equipped with an audio circuit capable of outputting an alarm by voice, and a test command input means, and a test command input means. An alarm circuit testing device for a radio wave detector, characterized in that the audio circuit is operated when a command is input by means.