JPH09100663A - In-vehicle load remote control radio wave transmitter and adjustment method thereof - Google Patents

Abstract

(57) [Summary] [Purpose] The adjustment work can be performed without being affected by the body of the adjustment worker, and it is not necessary to mount an adjustment element on the radio wave transmission device, and a tool such as a driver can be used. (EN) Provided are a radio wave transmission device which does not require the adjustment which has a bad workability and an adjusting method thereof. [Configuration] A radio wave transmission device 1 for remotely controlling an in-vehicle load. The radio wave transmitter 1 has an antenna connection circuit 11,
It has 12. The probe 31 of the adjustment rank determination device 3 is brought into contact with the antenna connection circuits 11 and 12, the oscillation circuit 13 of the radio wave transmission device 1 is activated, the output signal of the probe 31 is amplified by the device body 35, and signal processing is performed. The adjustment rank obtained as a result is displayed on the display unit 36. Then, an antenna corresponding to this adjustment rank is selected from the several kinds of antennas 21 to 25 prepared in advance and connected to the antenna connection electric paths 11 and 12.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device carried by a vehicle owner or the like, which transmits a radio wave signal from the vicinity of the vehicle to a vehicle side receiving device and is installed in a vehicle such as a door lock actuator. The present invention relates to an on-vehicle load remote control radio wave transmitter for remotely controlling a load and an improvement in an adjusting method thereof.

[0002]

2. Description of the Related Art A conventional technique of this kind is disclosed in, for example,
There was a technique shown in Japanese Patent No. 82699. This prior art has shown a device that transmits a radio wave signal from the vicinity of the vehicle to a vehicle side receiving device and remotely controls various loads mounted on the vehicle, similarly to the vehicle-mounted load remote control radio wave transmitting device in the present application. It is a thing. In this type of vehicle-mounted load remote control radio wave transmission device, due to regulations under the Radio Law, for example, the electric field strength of the transmitted radio wave measured at a point 3 [m] away from the radio wave transmission device indicates the temperature characteristics and voltage of the radio wave transmission device. Regardless of factors such as characteristics and directivity, it must always be 500 [μV / m] or less, and therefore the manufacturing variations of the radio wave transmitters are adjusted so that the electric field strength falls within an allowable range. For example, in order to adjust the electric field strength, the radio wave transmitter with the antenna connection completed is installed in the electric field strength inspection device, and the electric field strength measured at a predetermined distance from the radio wave transmitter falls within the control value. As described above, adjustment work such as adjusting a trimmer capacitor and a variable resistor provided in the radio wave transmitting device with a tool such as a driver is performed.

[0003]

However, when the above-mentioned adjustment is performed, the electric field strength cannot be accurately measured due to the influence of the body of the adjusting operator.
There is a drawback in that it is necessary to mount an adjustment element on the radio wave transmission device, or it is necessary to perform adjustment with poor workability using a tool such as a driver. The present invention is to solve the above problems, it is possible to perform the adjustment work without being affected by the body or the like of the adjustment operator, and there is no need to mount an element for adjustment in the radio wave transmitting device, and It is an object of the present invention to provide a radio wave transmission device that does not require adjustment with poor workability using a tool such as a driver, and an adjustment method thereof.

[0004]

In order to solve the above-mentioned problems, the invention according to claim 1 firstly transmits a radio wave signal from a radio wave transmission device to a nearby vehicle to remotely control the on-vehicle load. In a remote control radio wave transmission device, an in-vehicle remote load which is detachably attached to the radio wave transmission device by selecting one of several different types of antennas in order to adjust the electric field strength of the radio wave generated from the radio wave transmission device to a constant level. A radio wave transmitter for control is provided.

According to a second aspect of the present invention, in an on-vehicle load remote control radio wave transmitting device for transmitting a radio wave signal from a radio wave transmitting device to a nearby vehicle to remotely control an on-vehicle load, an antenna of the radio wave transmitting device is provided. A first procedure for bringing the probe into contact with the connection circuit, a second procedure following the first procedure, operating the radio wave transmitting device, and determining the adjustment rank from the output signal of the probe at that time, and the second procedure Subsequently, the probe is detached from the radio wave transmitter, and a third procedure for connecting to the radio wave transmitter by selecting one of the differently prepared antennas corresponding to the adjustment rank is provided. A method of adjusting a radio wave transmitter for remote control is provided.

The invention according to claim 3 provides a method for adjusting a radio wave transmitter for vehicle-mounted load remote control, wherein the probe has the same shape as an antenna.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A radio wave transmission device 1 shown in this embodiment is a device for remotely controlling an on-vehicle load such as a door lock actuator provided in a vehicle door lock mechanism by transmitting a radio wave signal to a vehicle side reception device. doing. In the accompanying drawings, reference numeral 1 is a radio wave transmission device. The radio wave transmitter 1 is
It has antenna connection electric circuits 11 and 12 and an oscillation circuit 13 electrically connected thereto. Explaining the oscillator circuit 13, the oscillator circuit 13 includes a surface acoustic wave element (Surface A) having a natural frequency of about 300 [MHz].
(Coustic Wave Device) or a high-frequency transistor to which the surface acoustic wave element is connected, and the like, and forms a high-frequency oscillator circuit such as a Hartley oscillator circuit or a Colpitts oscillator circuit. And
By using the filter characteristic of the surface acoustic wave element, the circuit configuration is such that an oscillation signal having an oscillation frequency component converged in the vicinity of about 300 [MHz] can be output.

Further, the radio wave transmitting device 1 has an oscillating circuit 13
It has an operation circuit 14 electrically connected to. The operation circuit 14 includes a push switch 15, an encoder 16 that generates a coded pulse signal in which an ID code and a door lock control code are combined by operating the push switch 15, and a button battery (not shown). doing. The coded pulse signal derived by the encoder 16 is repeatedly derived while the push switch 15 is being pressed, in the order and combination of the high level pulse signal and the low level pulse signal preset for each code. And one pulse length is the oscillation circuit 13
The oscillation circuit 1 is set to be sufficiently longer than the oscillation cycle of the oscillation circuit 1 when the encoder 16 derives a high-level pulse signal.
3 is configured to vibrate at a UHF band frequency of about 300 [MHz]. After all, the oscillation circuit 13 is about 300
The carrier wave in the UHF band is formed by adding the coded pulse signal derived by the encoder 16 to the oscillation signal of [MHz].

The oscillation circuit 13 and the operation circuit 14 may be mounted on one board. Further, the radio wave transmission device 1 may be housed in a case (not shown) made of synthetic resin or the like so that the owner of the vehicle can easily carry it.

Next, a method of adjusting the radio wave transmitter 1 will be described. Reference numeral 3 shown in FIG. 1 is an adjustment rank determination device. The adjustment rank determination device 3 is a device that selects an appropriate antenna to be connected to the radio wave transmission device 1, and has probes 31 and 32 having the same shape as the antenna, and the probes 31 and 32.
A shield box 33 that electromagnetically shields the probes 31 and 32 and the radio wave transmission device 1 from the outside, and a shield wire 34 that connects the probe 32 and the device body 35. The apparatus body 35 includes an amplifier (not shown) that amplifies the electric signal from the probe 32 and a display unit 36 that displays the adjustment rank based on the output of the amplifier.

The adjustment rank indicates which of the five kinds of antennas 21, 22, 23, 24, 25 prepared in advance is suitable for the radio wave transmitter 1 whose rank is being determined. Yes, it is displayed on the display unit 36 by digital display or analog display.

In the case of this embodiment, the antennas 21 to 25 have a loop antenna shape. The electric field strength E [μV / m] of the radio wave generated by the loop antenna-shaped antennas 21 to 25, the wavelength λ [m] of the radio wave generated by the antennas 21 to 25, and the distance L [m] from the antennas 21 to 25. , The frequency F [MHz] of the radio waves generated by the antennas 21 to 25, and the diameter D formed by the antennas 21 to 25.
[Mm] and high frequency current I flowing through the antennas 21 to 25
The relationship with [mA] can be expressed by the following equation (1).

[0013]

(Equation 1)

In the equation (1), for example, L = 3 [m],
F = 300 [MHz] (λ = 1 [m]), D = 10.0
Substituting [mm] and I = 9 [mA], the electric field strength E [μV
As a result of calculating [/ m], the following value can be obtained.

[0015]

(Equation 2)

The electric field strength E = 280 [μV / m] (=
The value of 49 [dBμV / m] should be within the allowable range of E = 500 [μV / m] or less regulated by the Radio Law regardless of factors such as temperature characteristics, voltage characteristics, and directivity of the radio wave transmitter. This is a temporarily set management value. Radio wave transmitter 1
Adjust to fall within this control value. For example, when the high frequency current I flowing through the antenna of the radio wave transmitting device 1 is distributed in the range of 7 to 11 [mA] due to manufacturing variations, this high frequency current I = 7 to 11 [mA] and the management electric field strength E =
280 [μV / m], radio frequency F = 300 [MH
z], radio wave wavelength λ = 1 [m], and distance L = 3 [m] are substituted into the above equation (1) for calculation, the antennas 21 to
The diameter D of 25 is required to be set in the range of 9.0 to 11.3 [mm]. This high frequency current I [m
The following table summarizes the relationship between A] and the diameter D [mm] of the antennas 21 to 25.

[0017]

[Table 1]

From the above, the antennas 21 to 25 have respective diameters D of 9.0 [mm], 9.5 [mm], 1
0.0 [mm], 10.6 [mm], 11.3 [mm]
Is set to The diameter D of the antennas 21 to 25 is not limited to this numerical value, and can be set as appropriate according to the performance and specifications of the radio wave transmission device 1.

The adjustment method will be described below in order. First procedure (see FIG. 1): The probe 31 of the adjustment rank determination device 3 is brought into contact with the antenna connection electric paths 11 and 12 of the radio wave transmission device 1. Second procedure (see FIG. 2): Following the first procedure, the radio wave transmitter 1 is operated and the other probe 3 at that time is activated.
The output signal of No. 2 is amplified by the device body 35, and the adjustment rank is displayed on the display unit 36. In this embodiment, the adjustment ranks are displayed in five stages corresponding to the five types of antennas 21, 22, 23, 24 and 25. Third procedure (see FIG. 3): Following the second procedure, probe 3
1, 32 are removed from the radio wave transmission device 1, and one of the five kinds of antennas 21, 22, 23, 24, 25 corresponding to the adjustment rank displayed on the display unit 36 is selected and connected to the radio wave transmission device 1. To do. For example, when the adjustment rank displayed on the display unit 36 is the first rank, the antenna 21 is connected to the antenna connection electric lines 11 and 12 of the radio wave transmitter 1. Similarly, the antenna 22 in the second rank, the antenna 23 in the third rank, the antenna 24 in the fourth rank,
In the fifth rank, the antenna 25 is connected. Incidentally, in the embodiment shown in FIG. 3, the antenna 24 of the fourth rank is connected. The radio wave transmitter 1 to which one of the antennas 21, 22, 23, 24 and 25 is connected by the above procedure is completed by connecting the operation circuit 14 and housing it in the case.

Next, the operation of the embodiment will be described. For example,
When an occupant gets out of the vehicle and operates the push switch 15 to lock the door using the radio wave transmitting device 1 carried, the encoder 16 derives a coded pulse signal that is a combination of an ID code and a door lock control code. As a result, the oscillation circuit 13 forms a carrier wave in the UHF band in which the coded pulse signal derived by the encoder 16 is added to the oscillation signal of approximately 300 [MHz], and the antennas 21, 22 and 22 are formed.
Radio waves are transmitted from 23, 24, and 25 to the vehicle-side receiving circuit.

On the other hand, the vehicle-side receiving circuit having a decoder (not shown) detects a coded pulse signal from the carrier wave and compares the coded pulse signal with the data previously stored in the decoder. Then, as a result, when it is detected that the coded signal is a coded pulse signal indicating door lock control of the vehicle, the actuator is controlled to drive the vehicle door lock mechanism to the lock side.

[0022]

Since the radio wave transmitting device according to the present invention has the above-described configuration and adjusting method, the adjustment work can be performed without being affected by the body or the like of the adjusting operator, and the radio wave transmitting device can be adjusted. It is not necessary to mount an element for
Further, there is an effect that adjustment with poor workability using a tool such as a driver is not required.

[Brief description of the drawings]

FIG. 1 is a perspective view illustrating a first procedure of an adjusting method according to the present invention.

FIG. 2 is a perspective view illustrating a second procedure of the adjusting method according to the present invention.

FIG. 3 is a perspective view illustrating a third procedure of the adjusting method according to the present invention.

FIG. 4 is a perspective view illustrating a radio wave transmitter according to the present invention.

[Explanation of symbols]

 1 Radio Transmission Device 11, 12 Antenna Connection Circuit 13 Oscillation Circuit 14 Operation Circuit 15 Push Switch 16 Encoder 21, 22, 23, 24, 25 Antenna 3 Adjustment Rank Judgment Device 33 Shield Box 34 Shield Wire 35 Device Main Body 36 Display Section

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical display location E05B 65/20 E05B 65/20 H04Q 9/00 301 H04Q 9/00 301B 321 321A

Claims (3)

[Claims] 1. A radio wave transmission device (1) for a nearby vehicle.
In order to adjust the electric field strength of the radio wave generated from the radio wave transmission device (1) to a constant level in a radio wave transmission device for in-vehicle load remote control for transmitting a radio wave signal from the radio wave to remotely control an in-vehicle load, several different types of antennas are used. An on-vehicle load remote control radio wave transmission device in which one selected from (21, 22, 23, 24, 25) is detachably attached to the radio wave transmission device (1). 2. A radio wave transmission device (1) for a nearby vehicle.
A radio wave transmitting device for remote control of an in-vehicle load, which transmits a radio wave signal from a car to remotely control an in-vehicle load, comprising: an antenna connection circuit (11, 12) of a radio wave transmitting device (1)
First step of bringing the probe (31) into contact with the first step, and following the first step, the radio wave transmitting device (1) is operated, and the second step of determining the adjustment rank from the output signal of the probe (32) at that time Then, following the second procedure, the probe (31) is removed from the radio wave transmitter (1), and the adjustment is performed from among several different kinds of antennas (21, 22, 23, 24, 25) prepared in advance. A third procedure of selecting one corresponding to the rank and connecting to the radio wave transmission device (1), and a method for adjusting the radio wave transmission device for vehicle-mounted load remote control. 3. The invention according to claim 2, wherein the probe (31, 32) is an antenna (21, 22, 2).
3, 24, 25) A method for adjusting a radio wave transmitter for vehicle-mounted load remote control, which has a shape similar to that of (3, 24, 25).