JP4894229B2 - Radio wave detection device - Google Patents

Description

  The present invention relates to a radio wave detection device, and more particularly, to a radio wave detection device that detects interference radio waves of a radio wave type remote controller.

  In recent years, radio remote controllers (hereinafter referred to as “remote controllers”) have been used in remote keyless entry systems, smart entry systems, garage opener systems, and the like.

  If the system does not operate or malfunctions despite the operation of such a radio remote controller, there may be a large level of jamming radio waves at the same frequency as the radio remote controller.

  Conventionally, a spectrum analyzer or the like corresponding to a general-purpose broadband frequency has been used to detect the presence or absence of jamming radio waves from a radio remote controller and to identify and detect the source of jamming radio waves.

Patent Document 1 describes an apparatus that determines that there is an interfering radio wave at that frequency if a carrier reception lamp is lit when there is no call operation by a wireless transmitter. Japanese Patent Laid-Open No. 2004-228688 describes a failure radio wave warning system that suppresses emission of radio waves from a mobile phone or the like in the vicinity of a user of a medical device. Further, Patent Document 3 describes that a disturbance signal is transmitted from a remote control receiver, and the receiver subtracts the disturbance signal from the reception signal of the remote control to obtain a remote control signal.
Japanese Patent Laid-Open No. 11-161862 JP 11-33125 A JP-A-7-131852

  When attempting to detect jamming signals using a spectrum analyzer that supports general-purpose broadband frequencies, the spectrum analyzer must be located where the system is not operating or malfunctions. Has a large size, poor portability, high cost, and poor operability.

  Moreover, in the technique described in Patent Document 1, it is determined whether or not there is a jamming radio wave in the reception state when the wireless call receiver is not called, but it is difficult to specify the source of the jamming radio wave, There was a problem that it was difficult to take effective measures against jamming.

  The present invention has been made in view of the above points, and an object of the present invention is to provide a radio wave detection device that is low in cost, portable, and capable of specifying a source of jamming radio waves.

The radio wave detection device of the present invention is a radio wave detection device that detects jamming radio waves with respect to output radio waves of a radio wave type remote controller,
Switch means to be turned on by user operation;
Detection means for detecting a signal in a frequency band in which an output radio wave of the radio remote controller exists;
Reference wave for storing the frequency of the output wave in which the electric-wave remote control, wherein Ru is detected by the detection means when the electric-wave remote control from on of the switch means in a predetermined time is operated to transmit a frequency of the reference wave Storage means;
Comparing means detects a coincidence by comparing the reference wave frequency stored in the reference wave memory means the frequency of detection by Ru detection signal by said detecting means,
Display means for displaying the presence of the jamming during coincidence detection by said comparing means,
Therefore, it is possible to specify a source of jamming radio waves that is low in cost and portable.

Further, the radio wave detection device of the present invention is a radio wave detection device that detects jamming radio waves with respect to output radio waves of a radio wave type remote controller,
  Switch means to be turned on by mounting the radio remote controller;
  Detection means for detecting a signal in a frequency band in which an output radio wave of the radio remote controller exists;
  A reference radio wave that stores the frequency of the output radio wave transmitted by the radio wave type remote controller detected by the detection means when the radio wave type remote controller is operated within a predetermined time from turning on the switch means as the frequency of the reference radio wave Storage means;
  A comparison means for performing coincidence detection by comparing the frequency of the detection signal detected by the detection means with the frequency of the reference radio wave stored in the reference radio wave storage means;
  Display means for displaying the presence of the jamming radio wave upon detection of coincidence by the comparing means;
  Therefore, it is possible to specify a source of jamming radio waves that is low in cost and portable.

In the radio wave detection device, the performed supply by Ri power ON of the switching means, having a power supply means for stopping the supply of the on the the longer predetermined time than the predetermined time elapses power from said switch means be able to.

  According to the present invention, it is possible to specify a source of jamming radio waves that is low in cost and portable.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 shows a block diagram of an embodiment of the radio wave detection apparatus of the present invention. In the figure, the tuning / detection circuit 10 tunes a signal in a predetermined frequency band from the signal received by the antenna 11, that is, a frequency band in which an output radio wave of the remote control exists, and supplies the signal to the amplification / detection circuit 12. The amplification / detection circuit 12 amplifies and detects the tuned signal, and supplies the detection signal to the reference radio wave storage circuit 13 and the comparison circuit 14.

  The reference radio wave storage circuit 13 stores the frequency of the detection signal as the frequency of the reference radio wave within a predetermined time (n: 1 minute, for example) after the switch 17 is turned on. The reference radio wave storage circuit 13 may be configured to store the reference radio wave frequency as long as the switch 17 is on.

  The comparison circuit 14 supplies the frequency of the reference radio wave stored in the reference radio wave storage circuit 13 to the display device 15 and also supplies the frequency from the amplification / detection circuit 12 within a predetermined time (m: 10 minutes, for example) after the switch 17 is turned on. The frequency of the detected signal is compared with the frequency stored in the reference radio wave storage circuit 13 and the comparison result is supplied to the display device 15. The display device 15 displays the frequency of the reference radio wave or the comparison result (presence / absence of interference radio wave detection) with a light emitting diode or a display.

  When the switch 17 is turned on by the user, the power supply operation permission circuit 16 operates on each of the amplification / detection circuit 12, the reference radio wave storage circuit 13, the comparison circuit 14, and the display device 15 for a predetermined time (m) after being turned on. Supply power.

  FIG. 2 shows a flowchart of detection processing by the radio wave detection apparatus of the present invention. This process is executed periodically. Note that the contents of the reference radio wave storage circuit 13 are cleared as preprocessing of this processing.

  In the figure, it is determined whether or not the switch 17 is turned on in step S1, and if the switch 17 is turned on, it is determined whether or not the reference radio wave has been detected in step S2. If the switch 17 is turned off, this is determined. The process ends.

  If the reference radio wave can be detected in step S2, the frequency of the reference radio wave is stored in the reference radio wave storage circuit 13 and displayed on the display device 15 in step S3. If the reference radio wave cannot be detected in step S2, it is determined in step S4 whether or not it is within a predetermined time (n) after the switch 17 is turned on. If it is within the predetermined time (n), the process proceeds to step S1. If the predetermined time (n) is exceeded, this process is terminated.

  On the other hand, after displaying the frequency of the reference radio wave on the display device 15 in step S3, it is determined in step S5 whether or not it is within a predetermined time (m) after the switch 17 is turned on, and within the predetermined time (m). In step S6, it is determined whether the radio wave having the same frequency as the reference radio wave stored in the reference radio wave storage circuit 13 has been detected by the amplification / detection circuit 12, and if the predetermined time (m) is exceeded. This process ends.

  If a radio wave having the same frequency as the reference radio wave can be detected, the presence of jamming radio wave detection is displayed on the display device 15 in step S7, and the process proceeds to step S5. If a radio wave having the same frequency as the reference radio wave cannot be detected, the process skips step S7 and proceeds to step S5.

  FIG. 3 is a flowchart of the display process executed in steps S3 and S7 when a single light emitting diode (LED) is used as the display device 15. In the figure, it is determined whether or not the frequency of the reference radio wave can be stored in the reference radio wave storage circuit 13 in step S11. If the frequency of the reference radio wave can be stored, the light emitting diode is turned on in step S12.

  Thereafter, it is determined whether or not the amplifying / detecting circuit 12 has detected a radio wave having the same frequency as the reference radio frequency stored in the reference radio wave storage circuit 13 in step S13. If it has been detected, the light emitting diode blinks in step S14. Then, this process ends. If the frequency of the reference radio wave cannot be stored in step S11, or if it cannot be detected in step S13, this process ends.

  FIG. 4 is an external perspective view of an embodiment of the radio wave detection device of the present invention. This radio wave detection device is for radio wave detection of a remote keyless entry system, for example.

  In the figure, all blocks of the antenna 11 to the switch 17 of the radio wave detection device shown in FIG. An insertion port 21 for mounting a remote keyless entry system remote control is provided on the side surface of the housing 20. A switch 17 is arranged at a position corresponding to the insertion slot 21 in the housing 20, and the switch 17 is turned on when the remote controller is inserted into the insertion slot 21 and attached. A light emitting diode (LED) 22 as the display device 15 is provided on the upper surface of the housing 20.

  Here, when the remote keyless entry system remote controller is inserted and inserted into the insertion port 21 of the radio wave detection device shown in FIG. 4 and the switch 17 is turned on and the remote control is operated in the vicinity of the radio wave detection device within n minutes. The frequency of the output radio wave of the remote controller is stored as the frequency of the reference radio wave in the reference radio wave storage circuit 13, and the light emitting diode 22 is turned on.

  Thereby, the operation check of the remote controller can be performed. A smart entry system or a garage opener system remote controller may be inserted into the insertion slot 21 for installation.

  Note that there may be a plurality of frequencies of the output radio wave of the remote control, but the amplification / detection circuit 12 of the radio wave detection device is a frequency band in which the tuning / detection circuit 10 is tuned so as to detect a plurality of frequencies output by the remote control. Is preset.

  Within m minutes after the switch 17 is turned on, the radio wave detection device is brought close to various devices that are considered to be sources of jamming radio waves, the light emitting diode 22 flashes, and “jamming radio wave detected” is displayed. Can be identified. As a source of jamming radio waves for the remote keyless entry system remote control, a cordless telephone, a garage opener system, an inverter built-in lighting device, and the like can be given.

  Further, when the radio wave detection device exceeds m minutes after the switch 17 is turned on, the auto power off function is activated and the power supply is shut off.

  FIG. 5 shows an external perspective view of another embodiment of the radio wave detection device of the present invention. This radio wave detection device is for radio wave detection of a smart entry system or a garage opener system, for example.

  In the drawing, all blocks of the antenna 11 to the switch 17 of the radio wave detection apparatus shown in FIG. On the upper surface of the housing 30, a remote control mounting surface 31 for mounting a remote control of a smart entry system or a garage opener system is provided by a step 32.

  A switch 17 is arranged in the center of the remote control placement surface 31 and is configured to be turned on when the remote control is placed on the switch 17. A light emitting diode (LED) 33 as the display device 15 is provided on the upper surface of the housing 30.

  Here, the smart entry system or garage opener system remote control is mounted on the remote control mounting surface 31 of the radio wave detection device shown in FIG. 5, and the radio wave detection device is turned on within n minutes after the switch 17 is turned on. When the remote controller is operated in the vicinity of, the frequency of the output radio wave of the remote controller is stored as the frequency of the reference radio wave in the reference radio wave storage circuit 13, and the light emitting diode 33 is turned on.

  Thereby, the operation check of the remote controller can be performed. Note that a remote keyless entry system remote controller may be mounted on the insertion slot 21.

  Within m minutes after the switch 17 is turned on, the radio wave detection device is brought close to various devices considered to be the source of the jamming radio wave, the light emitting diode 33 blinks, and “jamming radio wave detected” is displayed. Can be identified.

  Further, when the radio wave detection device exceeds m minutes after the switch 17 is turned on, the auto power off function is activated and the power supply is shut off.

  The tuning / detection circuit 10 and the amplification / detection circuit 12 correspond to the detection means described in the claims, the reference radio wave storage circuit 13 corresponds to the reference radio wave storage means, the comparison circuit 14 corresponds to the comparison means, and the display device Reference numeral 15 corresponds to display means, the switch 17 corresponds to switch means, and the power supply operation permission circuit 16 corresponds to power supply means.

It is a block diagram of one embodiment of a radio wave detection device of the present invention. It is a flowchart of the detection process by the electromagnetic wave detection apparatus of this invention. It is a flowchart of a display process. It is a figure which shows an example of the navigation display screen which displayed the predicted value of traffic. It is an external appearance perspective view of one Embodiment of the electromagnetic wave detection apparatus of this invention. It is an external appearance perspective view of other embodiment of the electromagnetic wave detection apparatus of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Tuning / detection circuit 11 Antenna 12 Amplification / detection circuit 13 Reference radio wave memory circuit 14 Comparison circuit 15 Display device 16 Power supply operation permission circuit 17 Switch 20, 30 Case 21 Insertion port 22, 33 Light emitting diode 31 Step

Claims (3)

A radio wave detection device that detects interference radio waves with respect to output radio waves of a radio remote controller,
Switch means to be turned on by user operation;
Detection means for detecting a signal in a frequency band in which an output radio wave of the radio remote controller exists;
Reference wave for storing the frequency of the output wave in which the electric-wave remote control, wherein Ru is detected by the detection means when the electric-wave remote control from on of the switch means in a predetermined time is operated to transmit a frequency of the reference wave Storage means;
Comparing means detects a coincidence by comparing the reference wave frequency stored in the reference wave memory means the frequency of detection by Ru detection signal by said detecting means,
Display means for displaying the presence of the jamming during coincidence detection by said comparing means,
A radio wave detection device comprising: A radio wave detection device that detects interference radio waves with respect to output radio waves of a radio remote controller,
Switch means to be turned on by mounting the radio remote controller;
Detection means for detecting a signal in a frequency band in which an output radio wave of the radio remote controller exists;
A reference radio wave that stores the frequency of the output radio wave transmitted by the radio wave type remote controller detected by the detection means when the radio wave type remote controller is operated within a predetermined time from turning on the switch means as the frequency of the reference radio wave Storage means;
A comparison means for performing coincidence detection by comparing the frequency of the detection signal detected by the detection means with the frequency of the reference radio wave stored in the reference radio wave storage means;
Display means for displaying the presence of the jamming radio wave upon detection of coincidence by the comparing means;
Telecommunications detecting apparatus characterized by having a. The radio wave detection device according to claim 1 or 2 ,
Telecommunications wherein performs supply by Ri power ON switch means, characterized by having a power supply means for stopping the supply of the on the the longer predetermined time than the predetermined time elapses power from said switch means Detection device.

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