JP2007004324A - Device for preventing portable generator from being stolen - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a device for preventing a portable generator from being stolen, the device making the function of a generator unusable, when a third person steals the generator and then restarts the engine, and consequently obtaining large theft-preventing effect. <P>SOLUTION: A portable generator is provided with a synchronous generator 11, which is driven by an engine; and an automatic voltage control devices 21, which automatically set the voltage outputted from the synchronous generator to a preliminarily fixed voltage. In this case, the portable generator is provided with an ID collation part 31, which collates a specific ID cord storage value (C1) set to each of the automatic voltage control devices with an ID code input value (C2) inputted from an ID key 32, which is different from the starting key of engine, and will allow automatic voltage control devices to be operable, only when the ID cord storage value matches the ID code input value. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an antitheft device for a portable generator, and more specifically, a portable generator having an automatic voltage regulator that drives a synchronous generator by an engine and adjusts the output voltage of the synchronous generator to a set voltage. Relates to a theft suppression device.

Conventionally, many proposals have been made to prevent or suppress theft of a portable generator. For example, a locking member engaged with a bar or rope hook of a suspension provided on a portable generator and locked (for example, see Patent Document 1), or a password set in advance when starting an engine A device for inputting a number (for example, see Patent Document 2) is known. In addition, some construction machines such as backhoes are designed to prevent a third party from starting the engine by attaching an immobilizer.
JP 2003-214174 A JP 2003-90256 A

  Both can expect a certain degree of prevention effect and suppression effect against theft of portable generators, but in the one described in Patent Document 1, until the act of forcibly destroying and theft the blocking member There is a problem that it can not cope. Moreover, in what was described in patent document 2, it is known that an easy number is often carelessly set as a personal identification number, and the antitheft effect is often disabled.

  Furthermore, in these measures, portable generators that have been successfully taken away can be easily used as a generator by a third party if the engine can be started by directly connecting the internal wiring without a start key. There is. Even if the engine cannot be started, a predetermined function as a generator can be obtained by combining it with driving means such as another engine.

  Therefore, even if a third party takes away the portable generator and starts the engine, the present invention cannot obtain the function as a generator and can suppress theft of the portable generator that can provide a great antitheft effect. The object is to provide a device.

  In order to achieve the above object, a portable generator antitheft device according to the present invention includes an engine, a synchronous generator driven by the engine, and a voltage output from the synchronous generator set to a preset voltage. In a portable generator equipped with an automatic voltage regulator that automatically adjusts, a unique ID code storage value set for each automatic voltage regulator and an ID key that is different from the engine start key are input. The ID code input value is collated, and only when the stored ID code value and the ID code input value are matched, an ID collation unit is provided that makes the automatic voltage regulator operable. It is said. Furthermore, the present invention is characterized in that the ID collating unit is integrally incorporated in the automatic voltage regulator.

  According to the portable generator antitheft device of the present invention, since the automatic voltage regulator does not operate normally unless the ID codes match, the rotating armature portion of the synchronous generator is driven and rotated by the engine. However, a predetermined voltage is not output, and it does not function as a generator. Thereby, it is recognized that the theft of the portable generator is meaningless, and the theft of the portable generator is suppressed. Further, by inputting a code from the ID key, a complicated ID code can be set in advance for each automatic voltage regulator as compared with the personal identification number, so that a greater antitheft effect can be obtained. Furthermore, by integrating the collation unit with the automatic voltage regulator, it is possible to disassemble and make it impossible to operate only the automatic voltage regulator.

  FIG. 1 is a schematic block diagram showing an example of an antitheft device in a portable generator according to the present invention, and FIG. 2 is an explanatory diagram for explaining the function of an automatic voltage regulator (AVR).

  First, as shown in FIG. 2, the synchronous generator 11 provided in the portable generator includes an exciter field coil 12 and a main generator armature 13 provided in a fixed armature portion such as a frame, and an engine 14. The exciter armature 16 and the main field magnet coil 17 provided in the rotary armature portion 15 that is rotationally driven by the motor are provided. In such a synchronous generator 11, when a DC voltage is applied to the exciter field coil 12 to generate a magnetic force in the exciter field coil 12, an AC voltage higher than the DC voltage is applied to the exciter armature 16 by this magnetic force. This AC voltage is rectified by the diode 18 and applied to the main field magnet coil 17, and a magnetic force is generated in the main field magnet coil 17. Then, when the main field magnet coil 17 having magnetic force rotates, an AC voltage is generated in the main generator armature 13 and supplied to the load 19.

  In order to maintain the generated AC voltage at a predetermined voltage, the amount of DC voltage applied to the exciter field coil 12 is adjusted to adjust the magnetic force generated in the exciter field coil 12, and the exciter field coil 12. Thus, it is necessary to adjust the magnetic force generated in the main field magnet coil 17 by adjusting the voltage (current) applied to the main field magnet coil 17 via the exciter armature 16 and the diode 18.

  The automatic voltage regulator (AVR) 21 automatically adjusts the amount of current applied to the exciter field coil 12 in accordance with the AC voltage output from the main generator armature 13 of the synchronous generator 11 to the load 19. The voltage detection unit 22 that detects the output voltage of the synchronous generator 11, the voltage set in the voltage command unit 24 by the voltage setting unit 23, the voltage detected by the voltage detection unit 22, and the command from the voltage command unit 24 A comparison unit 25 that compares the calculated voltages, a calculator 26 that calculates the amount of current supplied to the exciter field coil 12 according to the comparison result of the comparison unit 25, and a calculation result of the calculator 26. An amplifier 27 that outputs a predetermined current to the exciter field coil 12 is provided.

  When the output voltage of the synchronous generator 11 decreases with respect to the set voltage (target voltage) set by the voltage setter 23, the output voltage is set by increasing the amount of current supplied from the amplifier 27 to the exciter field coil 12. When the output voltage of the synchronous generator 11 rises above the set voltage, the amount of current supplied from the amplifier 27 to the exciter field coil 12 is reduced so that the output voltage becomes the set voltage. To do.

  In general, the synchronous generator 11 has different characteristics for each synchronous generator depending on the winding state of each coil, etc., so the automatic voltage regulator 21 attached to one synchronous generator 11 is: The functions of the calculator 26 and the like are adjusted according to the characteristics of the synchronous generator 11. Therefore, even if the automatic voltage regulator attached to one synchronous generator is removed and attached to another synchronous generator, the other synchronous generator will not operate normally, and the same manufacturer's synchronous generator Even when combined with the automatic voltage regulator, a desired output voltage cannot be obtained, the output voltage varies (hunting), or the control becomes impossible. Furthermore, there is a possibility that the synchronous generator and the automatic voltage regulator may burn out due to excessive current flow. Moreover, it is almost impossible to combine a synchronous generator of another manufacturer with an automatic voltage regulator, and even if combined, it is impossible to perform normal power generation with the synchronous generator.

  The antitheft device 30 in the portable generator having the synchronous generator 11 and the automatic voltage regulator 21 as described above is formed by an ID verification unit 31 and an ID key 32 as shown in FIG. The ID collation unit 31 receives the storage unit 33 storing the unique ID code (C1) set for each automatic voltage regulator 21 and the ID code (C2) set for the ID key 32. The input / output unit 34 compares the ID code input value (C2) input to the input / output unit 34 with the ID code storage value (C1) stored in the storage unit 33, and both ID codes C1 and C2 match. And a control unit 35 that generates an operation permission signal S3 of the automatic voltage regulator 21.

  When the engine 14 is started by the start key, if the ID code (C2) is input from the ID key 32 to the input / output unit 34, the ID code (C2) and the ID code stored in the storage unit 33 ( C1) is compared and collated by the control unit 35, and the operation permission signal S3 of the automatic voltage regulator 21 is generated only when both the ID codes C1 and C2 match, and this operation permission signal S3 is automatically generated from the input / output unit 34. Output to the voltage regulator 21.

  In the automatic voltage regulator 21, when the operation permission signal S3 is not received, at least one of the voltage detection unit 22, the voltage setting unit 23, the voltage command unit 24, the comparison unit 25, the arithmetic unit 26, and the amplifier 27 is included. Only when the operation permission signal S3 from the ID collating unit 31 is received, the automatic voltage regulator 21 functions normally and the synchronous generator 11 is activated. The power generation is enabled and the output voltage is automatically adjusted to the target set voltage.

  Therefore, if there is no ID key 32 in which the ID code (C2) corresponding to the ID code (C1) stored in the storage unit 33 of the ID verification unit 31 is set, the power generation by the portable generator cannot be performed normally. Become. That is, even if a third party takes away the portable generator, starts the engine 14 by some means, and rotates the rotating armature unit 15 of the synchronous generator 11 at a predetermined rotational speed, As long as the operation permission signal S3 is not received, an appropriate DC voltage is not applied to the exciter field coil 12, so that a desired output voltage cannot be obtained, the output voltage varies, or the control becomes impossible. The function as a generator cannot be obtained. Thereby, it is recognized that it is meaningless even if this type of portable generator is taken away, and a great suppression effect against theft of the portable generator is obtained.

  As the ID key 32, a contact type or non-contact type different from the engine start key can be used, and the ID code (C2) is input / output by a wireless method, an infrared method, a magnetic reading method, a scanner, or the like. The IC tag (IC chip), magnetic strap, bar code, two-dimensional code, etc. can be used. In particular, by using an IC card with a built-in IC tag, a complicated ID code can be set, handling is easy, and input to the input / output unit 34 can be easily performed. is there.

  As shown in the schematic block diagram of FIG. 3, the ID collation unit and the automatic voltage regulator can be incorporated integrally. That is, the control unit 31 that constitutes the antitheft device, and the control unit 41 that has the functions of the voltage command unit 24, the comparison unit 25, the computing unit 26, etc. that constitute the automatic voltage regulator 21, and the ID A storage unit 42 that stores the code (C1) and an input / output unit 43 that performs various inputs and outputs are integrally formed. The input / output unit 43 receives the generated voltage Vg of the synchronous generator 11, the set voltage Vs of the voltage setter 23, the ID code (C2) from the ID key 32 read by the ID key reading device 44, and the like. The control signal S4 of the amplifier 27 is output from the input / output unit 43, and a predetermined amount of current is output from the amplifier 27 to the exciter field coil 12 of the synchronous generator 11.

  Thus, even when the ID verification unit and the automatic voltage regulator are integrally formed, the ID code (C2) input from the ID key 32 matches the ID code (C1) stored in the storage unit 42. Only in this case, by making the function as an automatic voltage regulator operable, if there is no corresponding ID key, the synchronous generator 11 can function normally even if the engine is started. It becomes impossible. In addition, by integrally forming the ID collation unit and the automatic voltage regulator, it becomes impossible to disassemble and operate only the automatic voltage regulator, and the number of parts can be reduced.

  Further, as shown in the schematic block diagram of FIG. 4, the function of the voltage setting unit 23 for setting the target voltage in the automatic voltage regulator 21 can be controlled by the ID verification unit 31. In this case, only when the ID code (C2) from the ID key 32 read by the ID key reading device 44 matches the ID code (C1) stored in the ID verification unit 31, the voltage setting device 23 The signal S5 corresponding to the voltage set to is input to the automatic voltage regulator 21. Therefore, when the ID codes do not match, the voltage cannot be set in the automatic voltage regulator 21, and the synchronous generator 11 does not generate power or cannot obtain a desired voltage.

It is a schematic block diagram which shows one example of a theft suppression apparatus in the portable generator of this invention. It is explanatory drawing for demonstrating the function of an automatic voltage regulator. It is a schematic block diagram which shows the example which integrated the ID collation part and the automatic voltage regulator. It is a schematic block diagram which shows the example formed so that the function of the voltage setting device might be controlled by an ID collation part.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 11 ... Synchronous generator, 12 ... Exciter field coil, 13 ... Main generator armature, 14 ... Engine, 15 ... Rotary armature part, 16 ... Exciter armature, 17 ... Main field magnet coil, 18 ... Diode, 19 DESCRIPTION OF SYMBOLS ... Load, 21 ... Automatic voltage regulator, 22 ... Voltage detection part, 23 ... Voltage setting part, 24 ... Voltage command part, 25 ... Comparison part, 26 ... Operation unit, 27 ... Amplifier, 30 ... Antitheft device, 31 ... ID collation unit 32 ... ID key 33 ... storage unit 34 ... input / output unit 35 ... control unit 41 ... control unit 42 ... storage unit 43 ... input / output unit 44 ... ID key reading device

Claims (2)

  In a portable generator comprising an engine, a synchronous generator driven by the engine, and an automatic voltage regulator that automatically adjusts a voltage output from the synchronous generator to a preset voltage, A unique ID code stored value set in each automatic voltage regulator is collated with an ID code input value input from an ID key different from the engine start key, and the ID code stored value and the ID code input An antitheft device for a portable generator, characterized in that an ID verification unit is provided that enables the automatic voltage regulator to operate only when the values match.   The anti-theft device for a portable generator according to claim 1, wherein the ID collating unit is integrally incorporated in the automatic voltage regulator.

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