JP5684938B1 - A ringing adjustment device and ringing adjustment method for portable wireless devices that ring by detecting the approach of a moving object using radio waves. - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make a practical sound adjustment device of a portable wireless device in which a receiver with a built-in speaker and a rechargeable battery warns the approach of a weak radio wave generation source by the sound of the built-in speaker, in particular, a warning cannot be issued. Providing a ring adjustment device that has been devised to minimize equipment trouble. The sound adjustment device includes means for experimentally sounding a built-in speaker or the like of a portable wireless device. In addition, the ringing sensitivity can be checked efficiently with a test radio wave that periodically changes the radio wave intensity. The test radio wave may be a sine wave, a triangle wave, or a rectangular wave. By making a periodic change that covers the radio wave intensity of the weakest radio wave that rings, You can adjust the sensitivity by listening to the intermittent ringing of “P ...”. [Selection] Figure 10

Description

This application is division of Japanese Patent Application No. 2013-248784, and the item number of the claim in a specification is a thing of a division | segmentation destination .
The technical field of the present invention relates to devices called RF tags. It is used by attaching to a product such as clothing or electrical appliances with a storage medium using a non-contact IC chip and a plate (tag) embedded with an antenna.

  The product information of the attached product is written on the RF tag, and it is used for security such as shoplifting prevention of the product in the store where people come and go, and it can be inspected without taking out the product in the logistics scene such as warehouse or transportation. There are advantages such as.

  The present invention relates to a charger for a small portable wireless device that takes advantage of the characteristics of the RF tag as described above, and a function adjusting device and method for the device. As for the portable wireless device, as described in detail in Patent Document 1, an ultra-compact portable device that sounds by detecting the approach of a moving body with radio waves, that is, a warning sound by detecting the proximity of an object or the like with weak radio waves. Is a portable wireless device that emits

  In the description of the portable wireless device of Patent Document 1, a general description is given in which low-level physical energy is emitted, the energy is received, and the approach of the energy radiator is detected. However, in practice, energy radiation is preferably radio wave radiation, and therefore the present invention is limited to radio waves.

  Of course, the present invention can also be implemented by using light other than radio waves, such as infrared rays, and sound waves. The reason for adopting the radio wave here is that the radiation pattern can be adjusted by superimposing a plurality of radio wave radiation vectors by a plurality of antennas.

  For example, for use as an approach warning for a golf cart, it is preferable to radiate only to the front, so that radio waves are radiated only to the front by 3-4 antennas, in the cart, in the lateral direction, and in the rear direction. Is adjusted so as not to radiate. Technically, both light and sound are “waves”, so the same arrangement is possible, but the radio waves are most technically dead and there is a sense of security in practical use.

  Now, the present invention pays attention to the specification of the receiver when the patent document 1 is implemented. From the perspective of receiving radio waves, the receiver is like a small radio and is functionally simpler than the radio. That is, a radio wave from a weak radio wave generator (radio wave oscillator) mounted on a golf cart is received only when it is close to a close range of 1-2 m, and an alarm sound as a reception sound is sounded to make an approach alarm. .

  Therefore, it can be said that the receiver of Patent Document 1 is “a portable wireless device in which a receiver with a built-in speaker warns the approach of a weak radio wave generation source by the sound of the built-in speaker”.

  Here, consider the power source of the portable wireless device. Then there are two options. The choices are a “small primary battery” such as a button battery, and a “secondary battery” that can be charged.

  The inventor considered that adopting the former “small primary battery” had a disadvantage for the user. That is, assuming that the battery is used for at least 5-6 months without being replaced, a large-capacity battery having a thickness of 4-5 mm must be installed. Therefore, the wireless portable device becomes large.

  Furthermore, it is troublesome to replace the button battery. In a portable device having a seal structure in consideration of weather resistance such as waterproofing, it is necessary to open the case of the device with a screw or the like to replace the button battery. I don't want to do this even once every 5-6 months.

  From the above viewpoint, the inventor decided to employ a lithium polymer secondary battery used in a commercially available MP3 player (such as Ipod (registered trademark)). As an aside, the MP3 player at the beginning of the release was a specification that uses a secondary battery, but recently, since it is disposable in 2-3 months, the one with a button battery is increasing.

  The configuration of a commercially available MP3 player became a hint of the present invention. Fig. 2 to Fig. 4 show the fitting of the female connector part of a commercially available MP3 player adopting a secondary battery to the built-in speaker (Fig. 2) and the connected male connector (Fig. 3), and charging. A USB-AC power supply (rectifier) is shown for reference (FIG. 4).

  By adopting a secondary battery, it is expected to be charged almost every day, so a battery with a power capacity of about 2-3 days is sufficient. Therefore, the size can be reduced by an order of magnitude compared to the case of using a button battery of a portable wireless device.

  This is the premise of the present invention. The present invention relates to a “charger” of “a portable wireless device in which a receiver incorporating a speaker“ and a rechargeable battery ”warns the approach of a weak radio wave generation source by the sound of the built-in speaker”. A charger that contains a lot of functionality is sometimes called a "cradle".

A feature of the charger of the present invention is the use of a mini USB conversion connector for charging. Therefore, the prior art related to the “charger” of such portable devices was investigated. Taking into account the feature of using a USB conversion connector, similar inventions were investigated in the JPO database (implemented in November 2013). In other words, in “Publication text search”, check the type of publication: all types, and “summary + claims”
“USB” as the first keyword
“Charging” as the second keyword
The third keyword is "multiple multiple simultaneous"
"Cradle" as the fourth keyword
A list of 9 hits, which is the product set, is shown below.

1 JP 2013-110823 ELECTRONIC DEVICE, CHARGE CONTROL METHOD, AND DATA TRANSFER SYSTEM Sony Corporation
2 JP 2012-084199 CONTENT REPRODUCTION SYSTEM, CRADLE AND AMPLIFIER ONKYO CORPORATION
3 Japanese Unexamined Patent Publication No. 2007-318595 Mobile communication terminal antenna switching system NEC Infrontia Corporation
4 Japanese Unexamined Patent Application Publication No. 2006-246217 Portable Terminal System Pentax Corporation
5 JP-A-2006-179997 CAMERA DEVICE, ... CAMERA DEVICE CONTROL PROGRAM CASIO COMPUTER CO., LTD.
6 JP2005-339184 ELECTRONIC DEVICE AND POWER SUPPLY METHOD SONY CORPORATION
7 Japanese Patent Application Laid-Open No. 2003-180431 Documents for PDA Shinsuke Fujimoto and others
8 Japanese Patent Laid-Open No. 2002-252801 Cradle for Digital Camera Fuji Photo Film Co., Ltd.
9 Patent 4516935 Antenna switching system for mobile communication terminals

  A relatively similar technology among these nine cases is the “digital camera cradle” 8, but this cradle does not use USB. In other words, since the mini USB of the mini USB conversion cable as in the present invention is not used for charging, it was determined that the present invention is different from the present invention.

  Further, “4” “mobile terminal system” describes simultaneous charging of a plurality of terminals, but this is also different from the configuration of the present invention described later.

  In conclusion, no published patent similar to the present invention could be found. In addition, the following survey was conducted on the search site “Google” (implemented in October 2013). That is, even if one of the first keyword group and one of the second keyword group are sequentially picked up and a product set is searched by inserting a space between the keywords, it is similar to the present invention. I couldn't find a web page with information.

Japanese Patent No. 5273425 “Collision Warning System”

  An object of the present invention is to provide a practical charger for a portable wireless device in which a receiver incorporating a speaker and a rechargeable battery warns the approach of a weak radio wave generation source by the sound of the built-in speaker. In particular, what the present invention provides is a charger that has been devised to minimize device troubles such that a warning cannot be issued.

  The present invention also provides an appropriate ringing adjustment device and ringing adjustment method for such a portable wireless device.

  The device of the present invention is a charger for a portable wireless device in which a receiver incorporating a speaker and a rechargeable battery warns the approach of a weak radio wave generation source by the sound of the built-in speaker, the portable wireless device The mini-USB conversion male connector that fits into the mini-USB conversion female connector for charging provided in the device is characterized by being “arranged vertically and vertically”.

  In the claims, the male connector is simply arranged. However, as shown in FIGS. 1 and 8, it is preferable that the male connector is “in a generally vertically arranged manner”. It is.

  In addition to the “digital camera cradle” shown in the above-mentioned patent research, it has been shown that even with known cradles, the connection direction with the external connector is set up and down, and the digital camera and pager are placed vertically. Has been.

  However, there are no mini-USB conversion male connectors that are vertically arranged like a bamboo shoot. Of course, the mini USB conversion male connector can be placed sideways, and the mobile wireless device can be laid down and slid almost horizontally to connect the connector to the female connector of the device. I can't find it (it is novel).

  Conventionally, since the “USB” connection itself is also used for charging the peripheral device to be connected, there is no need for the aspect of claim 1. That is, the portable wireless device is connected to a personal computer via USB as shown in FIG. 17, and charging is performed on the power line while exchanging data on the signal line with application software such as ringing sensitivity adjustment.

  On the other hand, the charger in the case of performing only charging without performing signal line communication with application software or the like is as shown in FIG. That is, since it was fixed to the method of performing conversion between normal USB and mini USB by the “mini USB conversion cable” shown in FIG. 17 and FIG. 4, as shown in FIG. Only charging using a “USB power supply” (AC AC power supply rectifier equipped with a USB female connector) has been proposed, and practical sales have been made only in this mode.

  Claim 1 of the present invention can be said to be an integration of the components shown in FIG. In this manner, there is no problem that the “mini USB conversion cable” is lost, and the size is reduced by integration and the price is low.

  Here, it is preferable to make a device that facilitates connector connection by sliding movement by providing grooves / projections as shown in FIG. The contact resistance of the connector portion gradually increases due to the sliding of the connector when it is attached / detached, and it is the leading cause of failure of this type of portable device because of the operation involving the sliding. For this reason, a structural device capable of smoothly sliding the contact portion without blurring the sliding movement has an effect of reducing the failure rate and is effective.

  That is, (Claim 7), a long projection in the form of a groove or a square is provided in the casing of the portable wireless device, and the charger or the long projection in the form of a square is detachably attached to the charger. It is preferable that fitting / removal holes having protrusions / grooves that can be fitted / removed with the screw are disposed (see FIG. 7).

  The charger of the present invention may charge one portable wireless device as shown in FIG. However, such charging one by one is also performed by connecting to the personal computer shown in FIG. 17 and lacks inventive step. For the PC owner, the product in FIG. 8 is not an attractive charger. On the other hand, a device capable of charging a plurality of portable wireless devices as shown in FIG. 7 at a time is a plurality of portable wireless devices, such as the use as a collision alarm device for a human-cart in a golf course described in Patent Document 1. It will be accepted for use cases (by golf course managers).

  FIG. 1 shows an example of a product having such a function of charging multiple devices. FIG. 1 shows a so-called full-spec high-end model equipped with functions to be described later. First, it is desired to complete the description of the arrangement of the “fitting / removing holes” shown in FIG. 7 for charging a plurality of portable wireless devices. The main feature is the arrangement of the “combination / removal holes”.

  (Claim 8) When the charger is for charging by connecting a plurality of portable wireless devices, the charger includes a plurality of mini USB conversion male connectors and charging means connected to the male connectors. Of course, it is an aspect. Here, it is desirable to also have a means for cooling the charging means. This is because heat is generated when many devices are charged.

  Cooling means include air cooling with a fan as shown in FIGS. 1 and 7, water cooling with a closed flow path, and a heat pump or heat sink made of a metal material with high thermal conductivity such as copper or aluminum arranged in the case of the charger. It is preferable to install.

  On the other hand, some of the additional function needs of this portable wireless device are desired to have the functions of the MP3 player shown in FIGS. There seem to be many young users who want this. In other words, it is extremely rare when an alarm is issued due to the approach of a moving body, and otherwise it is desired to play music and listen to it with earphones.

  In this way, a product specification in which the portable device also functions as an MP3 player such as Ipod (registered trademark) or Walkman (registered trademark) may be sold. However, in the first place, the need for external speakers was in golf courses. That is, in a golf course that places importance on quietness, although it is a rare event, it is not preferable that the built-in speaker of the portable wireless device possessed by the player rings. In other words, golf courses basically want to enjoy playing in a quiet environment, and therefore want to receive an approach warning quietly with earphones.

  Because of these needs (Claim 2), the portable wireless device has external speaker output means and an external speaker output female connector is provided, and the external speaker output female connector provided in the portable wireless device is provided. It is preferable that the external speaker output male connector that fits into is arranged vertically upright. This is because, when charging, if a mode in which a bamboo shoot-shaped mini USB conversion male connector and this external speaker output female connector are arranged side by side vertically is inserted, the portable wireless device is slid from above. This is because it is easy to perform an operation of fitting and connecting to the connector (see FIG. 8).

  The same applies to the chargers (see FIG. 1) of a plurality of portable wireless devices in which external speaker output female connectors are disposed (Claim 9), and a plurality of fittings to the external speaker output female connectors. The external speaker output male connector is preferably arranged in parallel with the plurality of mini USB conversion male connectors.

  Now, portable wireless devices with built-in speakers and rechargeable batteries that warn when a weak radio wave source is approaching with the sound of the built-in speaker tell golfers the quiet approach of golf carts and other devices to prevent unexpected collisions. However, if the speaker breaks down when it is liver and kidney, there is no origin or child. However, it often does not happen that the golf cart approaches a dangerous distance and the built-in speaker rings.

  For this reason, the operating rate of the built-in speaker is low, and there is a case where it fails and does not ring, and there is anxiety. Therefore, for example, before using the battery charger every morning, it is appropriate to perform a speaker ringing test when charging is completed. Not only when the portable wireless device has a built-in speaker, but as described above, the portable wireless device has an external speaker output means and an external speaker such as an earphone via an external speaker output female connector. The same applies to the case where

  That is, (Claim 3), whether the portable wireless device has a built-in speaker, or (Claim 4), or an external speaker such as an earphone is connected, in either case, the speaker is experimentally tested. It is desirable to provide a means for ringing. Then, it is preferable to confirm whether or not the sound can be generated by giving a signal for forcibly sounding the built-in / external speaker by hardware or software.

  However, forcibly ringing will result in a failure check for the speaker alone. It is preferable to check the ringing by giving a radio wave to the receiver in a simulated manner. That is, it is preferable that the means for ringing (Claim 5) comprises a test radio wave generator for periodically changing the radio wave intensity, and checking with this test radio wave. In addition, in order to adjust the sensitivity of the ringing, adjust the ringing sensitivity of the speaker from the charger side by connecting the built-in speaker of the portable wireless device or the ringing means of the speaker connected to the outside of the portable wireless device via USB. It is desirable to have a means to do this.

  Here, the ringing sensitivity can be efficiently checked if the test radio wave (see FIGS. 5 and 6) periodically changes the radio wave intensity. As shown in FIG. 5, the test radio wave that is periodically changed may be sinusoidal, triangular, or rectangular, and as shown in FIG. By making periodic changes that cover the radio field intensity, the sensitivity can be adjusted by listening to the intermittent ringing of “Peep Peep”. That is, in FIG. 6, using the “means for adjusting the (peak-to-peak) intensity of a test radio wave that periodically changes the radio wave intensity” provided in the charger, It shows that the difference between the sounding time and the sounding time can be adjusted by listening.

  That is, (Claim 6), if the charger is equipped with means for adjusting the (peak-to-peak) intensity of the test radio wave that periodically changes the radio wave intensity, the radio wave intensity of the weakest radio wave that rings is covered. It is convenient when sending out test radio waves, and as mentioned above, you can hear the difference between the time when the beep sound is heard and the time when it is not heard. When the sounding and non-ringing are repeated at substantially equal time intervals, a method can be implemented in which the weakest threshold radio wave intensity is set.

  Now, as explained above, about the sound sensitivity adjustment, it may be an accessory function of the charger. However, since the dedicated “sound adjustment device” and “sound adjustment method” have also been proposed (invention), the following Insist on rights. Since these devices and methods are combined with the above charger, the explanation is redundant and redundant.

  That is, (Claim 10-12): a portable wireless device in which a receiver incorporating a speaker and a rechargeable battery warns the approach of a weak radio wave generation source by the ringing of a built-in speaker or an externally connected external speaker; Proposal (invention) of a device for adjusting speaker ringing sensitivity and a method thereof (claims 13-14) will be described.

  As in the case of adjusting the ringing sensitivity as an additional function of the charger, the dedicated device can also be adjusted (Claim 10) by connecting to the portable wireless device via USB and the built-in speaker of the portable wireless device rings. It would be inconvenient if there is no means for setting the weakest threshold radio field intensity from the outside of the portable wireless device.

Similarly, as a dedicated device (Claim 11), a test radio wave generator for generating a test radio wave whose radio wave intensity changes periodically, means for adjusting the (peak-to-peak) intensity of the test radio wave, It is desirable to have a means for adjusting the sound sensitivity of the speaker from the sound sensitivity adjusting device side by USB connection with the built-in speaker of the wireless device or the sounding means of the speaker connected to the outside of the portable wireless device. .

  Then, as a device dedicated to sound adjustment (Claim 12), the built-in speaker of the mobile wireless device or the speaker connected to the outside of the mobile wireless device rings periodically by a test radio wave that periodically changes the radio wave intensity. Means for detecting the length of the time interval that does not sound and the time interval that does not sound, and means for outputting the state when the time interval that is detected by the detecting means is substantially equal to the length of the time interval that does not sound It is preferable to further include

  When the duration of the ringing time interval and the non-ringing time interval are approximately equal, the threshold is set at the exact middle point of the peak-to-peak being tested, so the most appropriate adjustment. This can be said to be a point (see FIG. 15).

  Furthermore, if the adjustment regarding ringing is expanded and interpreted, there are five items described in claim 13. With these as targets for “adjustment of the ringing system”, the following content is claimed.

  That is, (Claim 13), a weak radio wave generation source arranged in an actual field, and a receiver using a test radio wave generator and a speaker and a rechargeable battery built-in, Or a method of adjusting a ringing system of a portable wireless device that warns by ringing of an externally connected external speaker, and a built-in speaker of the portable wireless device at a weak radio wave generation source arranged in an actual field, or DA [cm] is the approaching limit distance at which the externally connected external speaker starts ringing, and dA [cm] is the approaching limit distance at which the speaker starts ringing with the test radio wave generator at the same setting, dA [cm]. a step of obtaining a function that regresses the correlation between [cm] and dB [cm] from measured data, and a step of adjusting any of the following items 1 to 5 based on the regression function Law. And the items are as follows. Item 1 dA [cm], Item 2 dB [cm], Item 3 Radio field strength of weak radio wave source installed in actual field, Item 4 Radio field strength of test radio wave generator, Item 5 Radio wave reception sensitivity of portable wireless device .

  The flow of this method, in particular, “the approach limit distance at which the speaker starts ringing is defined as dA [cm], and the approach limit distance at which the speaker starts ringing with the test radio wave generator at the same setting as dB [cm], The process of “determining a function that regresses the correlation between dA [cm] and dB [cm] from measured data” is shown as a technical sheet in FIG.

The method will be described with reference to FIGS. 9 and 11 to 14. The point of the invention is that the attenuation of the radio wave occurs as a power of the distance, and the correlation between the actual field and the radio wave intensity of the test radio wave is regressed from the experimental data, which is dA [cm]. And dB [cm].

  First, since the radio wave is a kind of radiation source, that is, a “wave source”, it is attenuated “in inverse proportion to the square of the separation distance” in exactly the same way as the theoretical equation in which the sound source and light source attenuate at the separation position (see FIG. 11). . However, this is a theoretical formula, and in the case where directivity is provided by superposition of waves of a plurality of antennas described near the beginning of the description of the present invention, as shown in the lower part of FIG. Is inversely proportional to the first power to the third power.

  The numerical value from “1st to 3rd power” is case-by-case and must be determined experimentally. As shown in FIG. 12, the “weak radio wave source installed in the actual field” and the “ultra weak radio wave source for testing” in the present invention are also attenuated by different values of “1st to 3rd power”. doing. Therefore, it is determined recursively from experimental data obtained by measuring the radio field intensity by varying the distance with the numerical value as an unknown.

  The regression graph of this recursive decision is shown in the left part of the technical sheet of FIG. That is, trial and error is performed by changing the power multiplier so that the same experimental data is almost linear. Here, the feature of the present invention is that a power of the dA [cm] and dB [cm] is regressively determined as a power relation.

  In this way, as a result of determining the power value of “1st to 3rd power”, an optimal one is found, and so-called “y intercept” and “gradient (gradient)” are also obtained from the relationship graph. In other words, formulating the relational expression yields the following.

  The relational expression is (Claim 14), dA = (a1 + b1 * dB ** y) ** (1 / x), or dB = (b2 + a2 * dA ** z) ** (1 / w). Here, “*” indicates integration, and “**” indicates power multiplication. Here, the constants regressively determined from the actual measurement data are a1, a2, b1, b2, and w, x, y, z.

  Once the above relational expression is obtained by this series of operations, the rest is easy. FIG. 13 shows a graph obtained by actually substituting numerical values. The assumed numbers are shown at the top of the figure. The box-shaped numerical table in the figure is the calculated value.

  FIG. 14 shows a typical usage. This can be seen in conjunction with the separation distance between the test radio wave source and the receiver as shown in FIG. That is, here, attention is paid to portable wireless devices (No. 7, No. 5, No. 3 in the plurality of slots in FIG. 10) placed to adjust with values of dB [cm] of 6 cm, 9 cm, and 12 cm.

  The ringing in the real field of the portable wireless devices placed at these three positions is known to be 172 cm, 250 cm, and 328 cm, respectively, as shown by the arrows in the graph of FIG.

  The item 1 dA [cm] and the item 2 dB [cm] recited in claim 14 will have been clarified. Item 3 Regarding the radio field intensity of the weak radio wave source disposed in the actual field, item 4 radio field intensity of the test radio wave generator, and item 5 of the radio wave reception sensitivity of the portable radio device, for example, the portable radio device (see FIG. Since the ringing in the seventh real field of 10 slots is estimated to be 172 cm as shown by the arrow in the graph of FIG. 14, this is the item 3 of the weak radio wave source arranged in the real field. Adjust the radio wave intensity to 150cm.

  Then, a series of experimental data is collected again with the radio field intensity of the weak radio wave source arranged in the actual field changed by the operation, and the radio field intensity of the item 4 test radio wave generator or the item 5 mobile phone Since the operation of changing the radio wave reception sensitivity of the wireless device to an optimum one is performed, it is described in addition to claim 14. The adjustment means for each item is also clearly described in the description given so far, so that it can be implemented by those skilled in the art who handle radio equipment.

  Claim 1 of the present invention is that the components shown in FIG. 4 are integrated, and there is no problem that the “mini USB conversion cable” is lost in this mode, and the size is reduced by the integration. The price is also low.

  From the top of usability, it has been devised to facilitate connector connection by sliding movement by providing grooves and protrusions as shown in FIG. The contact resistance of the connector part gradually increases due to the sliding movement of the connector, and it is the leading cause of the failure of this type of mobile device due to the sliding operation. A structural device that can smoothly slide the contact portion is effective in reducing the failure rate.

Also, since the operation rate of the speaker is low and there is a case where it fails and does not ring, there is a sense of anxiety. For example, before using the battery charger every morning, the speaker ringing test can be performed when charging is completed. That is, whether or not the battery charger of the present invention can be sounded by providing a signal for forcibly sounding the built-in / external speaker in hardware or software, with means for sounding the speaker on a trial basis I was able to confirm.

  In addition, a device and method for adjusting the ringing sensitivity were provided to provide hints that could be carried out as a convenient and attractive business by adjusting not only the user but also the manufacturer / seller before shipping (details omitted).

The full specification Example of the charger of this invention is shown. It is a structure of a commercially available MP3 player, and shows a female connector portion of the player and a built-in speaker. The connection with the conversion cable with a male connector of the female connector of MP3 player, and the connection with the male connector of an earphone speaker are shown. An example of a USB power supply for charging a commercially available MP3 player is shown. The figure which shows the test electromagnetic wave which changes an electromagnetic wave intensity periodically. FIG. 6 is a diagram showing changes in ringing time and non-ringing time when the weakest threshold radio wave intensity (the y-axis value in the graph) is changed with a test radio wave that periodically changes as in FIG. 5. The best threshold setting for the signal strength is when the time intervals between ringing and non-ringing are equal. Explanatory drawing of the aspect (Claim 7) with which the groove | channel of a portable radio | wireless apparatus or a square-piece-like vertically slidably attachable / detachable protrusion and groove | channel which can be fitted and removed are arrange | positioned . Explanatory drawing of the aspect (Claim 8) which combined the means to cool a charging means with the charger which connects and charges a some portable radio | wireless apparatus. DA [cm] and dB [cm] where dA [cm] is the approach limit distance at which the speaker starts ringing, and dB [cm] is the approach limit distance at which the speaker starts ringing with the test radio wave generator at the same setting. Explanatory drawing of the process of calculating | requiring the function which regresses the correlation of this with actual measurement data. The figure used when demonstrating the separation distance of a test radio wave source and a receiver, and illustrating utilization of this invention. Referring to FIG. 14, the ringing in the real field of a portable wireless device (7th, 5th, 3rd in the plurality of slots in FIG. 10) placed to adjust with values of dB [cm] of 6 cm, 9 cm and 12 cm. The threshold distances are known to be 172 cm, 250 cm, and 328 cm, respectively, from the arrows in the graph of FIG. Attenuation of a general wave source and its energy is shown. The intensity of a distance is inversely proportional to the square of the distance. Explanation of the assumption that in the case of radio waves converged only in front of the golf cart as in the invention of Patent Document 1, attenuation is not necessarily inversely proportional to the square, but inversely proportionally distributed from the first power to the third power. Figure. 15. A graph obtained by actually substituting a numerical value into the relational expression of claim 14. The figure explaining utilization of the graph of FIG. The ringing distance in the real field of the portable wireless device (7th, 5th, 3rd of the multiple slots in FIG. 10) placed to be adjusted with the values of dB [cm] of 6 cm, 9 cm, and 12 cm can be found (in the figure) Arrow). It shows when the length of the time interval for sounding and the time interval for non-sounding are approximately equal. This is a state in which the threshold is determined at an intermediate point in the peak-to-peak of the radio field intensity being adjusted. The portable wireless device also has a music file playback function like a known MP3 player, usually playing music, and interrupting the music being played in an emergency when a mobile moving object approaches and sounds an alarm A device having such a composite function may be used. Sound adjustment of a normal portable wireless device is performed by a sound adjustment application software on a personal computer or the like via a USB interface. However, it is cumbersome to individually connect a personal computer to each mobile radio device to be adjusted. The present invention provides a device that can be adjusted at once without such a complicated operation.

Claims (2)

A receiver with a built-in speaker and rechargeable battery is a device that adjusts the speaker ringing sensitivity of a built-in speaker or a portable wireless device that warns by the ringing of an externally connected external speaker when a weak radio wave source is approaching. And
A means for setting the weakest threshold radio wave intensity at which the built-in speaker of the portable wireless device or an externally connected external speaker rings from the outside of the portable wireless device by USB connection with the portable wireless device , And
A device for adjusting the ringing sensitivity of a portable wireless device , which includes a test radio wave generator that generates a test radio wave that periodically changes the radio wave intensity, and means for adjusting the intensity of the test radio wave . Means to detect the length of time intervals when a built-in speaker of a portable wireless device or a speaker connected to the outside of a portable wireless device rings periodically and a time interval when it does not ring by a test wave that periodically changes the radio wave intensity and, said further comprising: means for announcing outputs the state when the length of the detected ringing time intervals that do not sound the time interval is approximately equal by the detection means, according to claim 1 Embodying.