JPH01104965A - Automatic starter - Google Patents

Abstract

PURPOSE:To permit the operation control by the input of the next kind of control signal by arranging an oscillation circuit which intermittently oscillates the output signal supplied from a control circuit in a prescribed cycle between an antenna and the control circuit. CONSTITUTION:During the time when a transmission control circuit 12 transmits the pulse signal outputs, an antenna 17 irradiates the FM waves as the output signal amplified by a high frequency amplifying circuit 16 periodically. When the output signal of a receiver 2 is caught by the receiving circuit of an oscillator 1, the start of a controlled device 3 is confirmed on this side of the oscillator 1 separated from the controlled device 3, and during the time when the pulse supplied from the transmission control circuit 12 is in OFF-state, the receiver 2 can receive the transmission signal of the transmitter 1. Therefore, the control for the next step from the receiver 1 side is permitted.

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to automatic starters for engines of ships and vehicles, high-voltage power supplies, and other industrial machines.

[Prior Art] In recent years, various devices have been put into practical use that transmit a TM wave signal of a constant frequency from a remote control side to automatically start the engine of a controlled vehicle or ship.

Furthermore, it is desired that these automatic starters be able to send a signal from the controlled side to the control side and use electromagnetic waves to confirm whether or not the control operation has been performed reliably.

[Problems to be solved by the invention] However, if the electromagnetic wave signal for control and the electromagnetic wave signal for confirmation are transmitted at the same frequency, the receiving circuit on the controlled side will not operate normally due to suppression. There's a problem.

If the electromagnetic waves emitted from the control side and the confirmation electromagnetic waves emitted from the controlled side are of a cross frequency, the above problem can be solved, but in this case, the electromagnetic waves of a particular frequency are transmitted between the control side and the controlled side. Since both sides must be able to transmit and receive, the circuit configuration is duplicated, and at least two antennas are required on the receiver side, one for receiving and one for transmitting. In addition to the car phone antenna, there is a problem in that multiple antennas are lined up in a row, resulting in an unsightly appearance.

For this reason, in conventional automatic starters, there has not been much practical equipment for checking the operation on the control side.

In order to solve the above-mentioned conventional problems, the automatic starter according to the present invention is capable of transmitting and receiving control signals for starting and for confirming operation using two antennas.

Specifically, the automatic starter according to the present invention includes one antenna that receives an electromagnetic wave signal of a predetermined frequency transmitted from a signal transmitter, a receiver connected to the antenna, and the above-mentioned signal received by the receiver. a control circuit that detects an electromagnetic wave signal, inputs the output signal to a starting circuit of a controlled device, and outputs an electromagnetic wave signal of the same frequency as the predetermined frequency to the antenna upon input of a response signal from the controlled device; The present invention is characterized in that an oscillation circuit for intermittent oscillation of the output signal from the control circuit at a predetermined period is disposed between the antenna and the control circuit.

[Example] Embodiments of the present invention will be described below based on the drawings.

FIG. 1 is a block diagram showing one embodiment of the present invention.
2 is a transmitter, 2 is a receiver, and 3 is a controlled device. Signals are transmitted and received between the transmitter 1 and the receiver 2 using an FM modulated wave signal.

The transmitter 1 includes two antennas 4, a transmission circuit (not shown) that FM-modulates two types of so-called two-tone mixed signal radio waves and simultaneously transmits them, and receives the same mixed signal radio waves as the transmitted signals. It is equipped with a possible receiving circuit.

The receiver 2 includes a receiving section including a high frequency amplification circuit 5% mixing circuit 6, a local oscillation circuit 7, an intermediate frequency amplification circuit 8, a detection circuit 9, a tone decoder 10, and a control circuit 11, a transmission control circuit 12, and a low frequency oscillation circuit. It is composed of a transmitter including a circuit 13, an oscillation circuit 14, a reactance modulation circuit 15, a high frequency amplification circuit 16, and - antennas 17.

Note that the receiving section has a general superheterodyne FM receiving circuit configuration.

That is, a two-tone FM signal wave transmitted from the transmitter l is received by the antenna 17 of the receiver 2, amplified by the high frequency amplification circuit 5, and input to the mixing circuit 6. In the mixing circuit 6, the received signal and a signal of a predetermined high frequency oscillation frequency input from the local oscillation circuit 7 are mixed,
The signal is converted into an intermediate frequency based on the difference in image frequency and is output to the intermediate frequency amplification circuit 8 at the next stage. The output of the intermediate frequency amplification circuit 8 is input to the detection circuit 9, separated and detected as a two-tone signal, and then input to the tone decoder IO.

The tone decoder 10 detects the frequencies of the two-tone signal, for example 820Hz and 1400Hz.

are set in advance, and an output is generated to the control circuit 11 when the frequency of the detected signal is respectively the same as the predetermined frequency.

The control circuit 11 is 1. This toe''/, -y, is activated by the output from the coder and outputs a control signal to the controlled device 3.The control circuit 11 includes, for example, a contact sequence circuit, Various types of non-contact sequence circuits, microcomputers, etc. can be used.

Ill also be launched? When a pulse signal indicating activation is fed back from the i1 device 3 side, the transmission control circuit 12 detects this and outputs a pulse signal of a predetermined width, for example, 1 second width, and the low frequency oscillation circuit 13 and the oscillation circuit Output to 14.

The oscillation circuits 1 and 4 are activated for a time corresponding to this pulse signal and generate an oscillation output as a carrier wave, and this oscillation output and a low frequency signal from the low frequency oscillation circuit 13 are input to the reactance modulation circuit 15. , modulate this to a predetermined FM
It is modulated into a signal wave and output to the high frequency amplification circuit 16. This FM signal wave is subjected to the same frequency modulation as that transmitted from the transmitter 1.

An FM wave, which is an output signal amplified by the high frequency amplifier circuit 16, is periodically radiated from the antenna 17 while the pulse signal output from the transmission control circuit 12 is being generated.

If the output signal from the receiver 2 is captured by a receiving circuit (not shown) of the transmitter 1, it is possible to confirm the start of the controlled device 3 from the side of the transmitter 1, which is far from the controlled device 3, and also control the transmission. While the pulse from the circuit 12 is in the OFF state, the receiver 2 is in a state where it can receive the transmission signal from the transmitter 1, so that the next step can be controlled from the transmitter 1.

FIG. 2 shows the embodiment of FIG. 1 using a concrete circuit, and each circuit in FIG. 1 is indicated by the same reference numeral.

In this circuit configuration, a mixing circuit 6, an intermediate frequency amplification circuit 8, and a detection circuit 9 are included in the IC 20, and a circuit using a crystal oscillator 21 is adopted as the local oscillation circuit 7.

Further, the output of the detection circuit 9 can be arbitrarily set and output within a wide range of 500 Hz to 500 KHz.

Furthermore, the tone decoder 10 includes two ICl0a.

10b, each in charge of one type of frequency, for example, 820Hz and 1400Hz as mentioned above,
An output is generated to the control circuit 11 only when both ICs 1Oa and 10b output simultaneously.

Therefore, when this device is used as an automatic starter for a car, for example, an almost infinite number of frequency combinations can be made, making it possible to avoid malfunctions due to interference.

The control circuit 11 includes a plurality of transistors Tr l'wTr
7. It is a sequence control circuit consisting of a thyristor SCR and relays RLI~4. In the illustrated example, relay RL3 is used for starting the engine starter controller (terminal 5TT in the figure), and relay RL4 is used for starting the ignition controller (terminal IG.

IG(B)) is used. In FIG. 2, the other output terminals are for connection to a door switch or parking switch (terminal D), a battery terminal (terminal +), and an accessory switch (terminal ACC).

Although not shown in FIG. 2, the controlled circuit 3 is of course an engine starter circuit when this device is used as an automatic engine starter for a car, and is connected to a terminal for receiving an ignition pulse signal indicating that the device has been started. It is designed to be input to terminal IGP.

In the illustrated example, the transmission control circuit 12 includes a transistor Tr8.
．． 9 and a one-shot multi-circuit 22, which supply a pulse voltage signal of, for example, one second width to an oscillation circuit 14 including a crystal oscillator 23.

Note that the low frequency oscillation circuit 13 and the reactance modulation circuit 15
The high frequency amplifier circuit 16 has a circuit configuration of a general FM wave transmitting circuit. Further, S in the figure is a power switch.

That is, a two-tone FM signal wave transmitted from the transmitter 1 is received by the antenna 17 of the receiver 2, amplified by the high frequency amplifier circuit 5, and input to the mixing circuit 6. IC
20, the received signal and a signal of a predetermined high frequency oscillation frequency input from the local oscillation circuit 7 are mixed, converted into an intermediate frequency by the difference in image frequency, subjected to intermediate frequency amplification, and detected into a two-tone signal. ICl0a,
The signal is input to the IC 10b.

ICloa% IC'''10b generates an L output when the frequency of this two-tone detection signal is the same as a predetermined frequency, and Tr1 to Tr1 of the control circuit 11
, Tr4 is turned off. Then, a negative voltage is applied to the gate of Cyrisk SCH, which turns it ON and current flows, transistors Tr5 to Tr7 conduct, and relays RLI NR
-L4 is turned ON sequentially according to a time constant.

stz-RLI, RL 2 (7) ON 4m, J
: Power is supplied to Q, terminals ACC and IG, and terminal STT is turned on by turning on relays RL3 and RL4.

Power is also supplied to IG (B), the engine starter is driven, and the starter motor is turned. On the other hand, relay RL3 is O
When N, the power supply to relays RLI and RL2 is cut off, and therefore relay RL3 is turned off. However, since the current continues to flow through the Cyrisk SCR, all the relays repeat the above ON/OFF operation again. Note that the circuit may be configured such that this engine start operation is stopped, for example, when the driver inserts the key and starts substitute driving.

On the other hand, when the engine is started and begins to rotate at a predetermined rotation speed, IG pulses are periodically input to the terminal IGP. This IG pulse is applied to the transistor Tr8 of the transmission control circuit 12.
．． 9 and input to the one-shot multi-circuit 22, which outputs a one-second pulse signal and outputs it to the low-frequency oscillation circuit 13 and the oscillation circuit 14.

The oscillation circuit 14 is activated for a time corresponding to this pulse signal and generates an oscillation output as a carrier wave, and this oscillation output and a low frequency signal from the low frequency oscillation circuit 13 are input to the reactance modulation circuit 15. is modulated into a predetermined FM signal wave, and output to the high frequency amplification circuit 16.

An FM wave, which is an output signal amplified by the high frequency amplifier circuit 16, is periodically radiated from the antenna 17 while the pulse signal output from the transmission control circuit 12 is being generated.

Of course, the present invention is not limited to the example shown in FIG. 2, and can be applied not only to automobiles but also to various other devices and equipment.

[Effects of the Invention] As explained above, the automatic starter according to the present invention periodically cuts off the electromagnetic wave signal for operation confirmation from the controlled side to the control side, so that This has the effect that the operation of the transmission circuit for operation confirmation is made intermittently, and the operation can be controlled by inputting another type of control signal during that time.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing one embodiment of the present invention, and FIG. 2 is a circuit diagram showing an example of the circuit configuration of the embodiment of FIG. 1: Transmitter, 2: Receiver 3: Controlled device, 1O: Tone decoder 11: Control circuit, 12: Transmission control circuit 17: Antenna

Claims (1)

[Scope of Claims] An antenna that receives an electromagnetic wave signal of a predetermined frequency transmitted from a signal transmitter, a receiver connected to the antenna, and an output signal that detects the electromagnetic wave signal received by the receiver. a control circuit that inputs an electromagnetic wave signal having the same frequency as the predetermined frequency to the antenna in response to input of a response signal from the controlled device; and the antenna and the control circuit. and an oscillation circuit disposed between the control circuit and the control circuit for intermittent oscillation of the output signal from the control circuit at predetermined intervals.