JPH0427234Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The invention is based on a golf cart that is driven by remote control along a cart running path provided at a golf course so as to go around each hole in a predetermined order. The present invention relates to a communication device, and particularly to a communication device for a remotely controlled traveling golf cart (hereinafter simply referred to as a golf cart) that communicates with a central device that manages the operation of a plurality of golf carts.

(Prior Art) Underneath the cart running path on which this type of golf cart runs, a single-track induction loop line is laid at a depth of about 10 cm from the road surface. A golf cart management room such as a kayak master room in the clubhouse is equipped with a central device used to manage the operation of multiple golf carts, and an inductive signal oscillator is attached to the central device. . An inductive signal of approximately 1.5KHz is supplied from this inductive signal oscillator to the inductive loop line. The golf cart traveling device guides and advances the golf cart along a course in which the strength of the guidance signal is equal on the left and right sides of the golf cart. The starting and stopping of the golf cart is controlled by a remote control device carried by the golf player or the golf cart. The golf cart is loaded with a golf bag containing golf clubs, and a player or a teammate can always have the required golf bag waiting nearby by simply operating the remote control device without having to transport the golf bag.

The conventional golf cart described above is not equipped with a communication device. Therefore, the only way for the player or player to contact the player or player is to go around by car or use a telephone provided at a rest area.

(Problems to be Solved by the Invention) As mentioned above, conventional golf carts were not equipped with a communication device. Therefore, the Kyaday master can contact the player or Kyaday only when the player or Kyaday is near the relay point.
Or only when someone drives out and speaks verbally in person. In this way, it was extremely difficult to interact with the Kiyadake Master, which manages the progress of carts and play, and players or quads. Of course, the above problem can be solved by using a wireless device installed in a taxi or the like. However, with normal taxi radio equipment, the voice calling one mobile station from the fixed station is also output from all other mobile stations, so the ringing tone becomes unnecessary noise to unrelated players and interferes with play. . In addition, in mobile telephone systems, there are restrictions on frequency allocation, making it difficult to implement.

Therefore, the purpose of this invention is to ensure that the communication between the central device that manages the operation of the golf cart and the golf cart is
To provide a remote-controlled traveling golf cart communication device that can be operated at any time without causing any trouble to players unrelated to the communication and without requiring special allocation of radio frequencies.

(Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention provides means that are mounted on a golf cart that runs under remote control along a guide track installed at a golf course. A device that communicates with a central device that manages the operation of a plurality of golf carts using audio signals,
a microphone for converting a speaker's voice into an electrical signal; a central paging switch that is manually operated when the speaker calls the central device; and a central paging switch that is manually operated when the speaker calls the central device; a circuit that generates a call code for calling a central unit; a carrier wave oscillation circuit that generates a carrier wave; and a circuit that receives the call code and the output of the microphone as a modulation signal, and when the call code is input, the call code is used to generate the call code. a modulation circuit that modulates a carrier wave and modulates the carrier wave with the output of the microphone when the call code is not input; a transmission amplifier circuit that amplifies the output of the modulation circuit; and an induction antenna that is electromagnetically coupled to the induction line. a pre-talk switch which is set to a transmitting state by a speaker when he or she attempts to make a call to the central device; when the inductive antenna is connected to a receiving terminal, the transmitting terminal is connected to the output terminal of the transmitting amplifier, a transmitting/receiving switch, the pass frequency band includes the frequency of a carrier wave transmitted from the central device, and the receiving terminal is connected to the transmitting/receiving switch; a bandpass filter that receives a reception signal from a terminal; a reception amplifier circuit that amplifies the output of the bandpass filter; and a circuit that receives the output of the reception amplifier circuit and demodulates the audio band signal sent from the central device. , a low-pass filter whose pass frequency band is in the audio band and receives the output of the demodulation circuit;
an identification circuit that identifies whether or not a predetermined slave station calling code is present in the output of the low-pass filter;
a circuit that generates a ringing tone signal when the identification circuit identifies that the slave station calling signal is present, and a circuit that generates a carrier wave detection signal when the carrier wave output from the reception amplifier circuit has a predetermined intensity. , a call holding circuit that holds a predetermined logical value for a predetermined period after the pre-talk switch is released from the transmitting state and set to the non-sending state; and this call holding circuit holds the predetermined logical value. an AND circuit that sends out a set signal when the carrier wave detection signal is received during a certain period; an AND circuit whose input terminal receives the output of the low-pass filter; an automatic call switch that is turned off when the carrier wave detection signal disappears due to contact, and an audio amplification circuit that amplifies the output of the low-pass filter and the ringing tone signal guided through the automatic call switch; a speaker that converts the output of the audio amplification circuit into audio, and the central calling switch is in the calling state or the press talk switch is in the sending state during the period when the carrier wave detection signal is not present. The transmitting/receiving switch control circuit sets the transmitting/receiving switch to the transmitting state during the period, and sets the transmitting/receiving switch to the receiving state during the other periods.

(Example) Next, the present invention will be described in more detail with reference to Examples.

Fig. 1 is a block circuit diagram showing a golf cart communication device (hereinafter simply referred to as a "child device" in the sense of a central device) according to an embodiment of the present invention, and Fig. 2 shows a communication device with the embodiment of Fig. 1. FIG. 3 is a timing diagram showing the operation of each part and the time relationship of signals when the central device in FIG. 2 calls the child device in FIG.
A timing diagram showing the operation of each part and the time relationship of signals when communicating between two slave devices. Figure 5 is a conceptual diagram showing a communication method using a single-wire inductive loop line as the transmission path. Figure 6 is a balanced diagram. FIG. 7 is a conceptual diagram showing a communication system using a two-wire inductive loop line as a transmission path. FIG. 7 is a conceptual diagram of a communication system showing a more specific version of the balanced two-wire inductive line shown in FIG. The communication systems shown in FIGS. 5 to 7 use the child device of the present invention.

The cheapest method for installing a guide line is
As shown in FIG. 5, this method utilizes a guiding loop line 1 necessary for guiding the golf cart. However, although this method is advantageous for short distances,
If the distance is several kilometers, such as a golf course, there will be a lot of noise and high output will be required, making it impractical. In order to improve this and enable effective communication with the child device of the present invention, a balanced two-wire system is used to reduce noise as shown in FIG. Techniques for reducing noise by utilizing the fact that when the same voltage to ground is induced in two lines, the voltage becomes zero between the lines are well known. In the communication system shown in FIG. 6, an inductive loop line 1 is used as one line of a balanced two-wire inductive line.

As mentioned above, in order to drive a golf cart along a predetermined travel path, a signal is required to guide the golf cart. Therefore, in general, a guidance loop wire is buried several tens of centimeters underground in the center of the cart running path, and a guidance signal (1.5 KH audio band frequency) is sent to this wire, and the golf cart detects this guidance signal and runs. I am using it. Therefore, since this inductive loop line is necessary, this inductive loop line is used as one line of a balanced two-wire type inductive line in this embodiment.

The details of the configuration of this communication method are as shown in FIG. In this figure, coils L1 and L2 block harmonics of the induction signal oscillator 4 and form a low frequency bandpass filter that has high impedance in the harmonic band. In addition, capacitors C1 and C2
has a high impedance in the low frequency band, and is inserted to prevent the induced signal output from the induced signal oscillator 4 from being attenuated in other parts of the central device 3. The terminating resistor R1 is a resistor for impedance matching of the balanced two-wire induction line constituted by the lines 1 and 2, and is provided to prevent reflected waves due to impedance mismatching.

Next, the operation when the central device 3 calls the slave devices and communicates with each other will be explained with reference to FIGS. 1 to 3. Manual call switch 83 in Figure 2
After turning it ON, operate the call switch 52. The call switch 52 has S1 corresponding to the number of the slave device.
- Sn are provided with individual slave device call switches, and pressing one of these slave device individual call switches calls the desired slave device. When one of the slave device individual call switches is pressed, the call signal generation circuit 55 encodes a signal corresponding to the unique call number of that slave device into 8-bit binary code (up to 256 types) and generates an intermittent audio frequency (approximately 600Hz). A signal is applied to modulator 59 on line 255a. Further, the terminal 62a of the transmission/reception changeover switch 62 is connected to the terminal 62b by a switch control signal outputted from the calling signal generating circuit 55 to the line 255b, and the transmission/reception changeover switch 62 is switched to the transmission state for about 0.5 seconds. FM modulated by modulator 59 and sent to transmitting amplifier 6
The calling signal whose power has been amplified at 0 is applied as an FM-modulated carrier wave current to the balanced two-wire induction line 10 via the transmission/reception changeover switch 62 and the line coupling circuit 11.

Since the inductive antenna B1 in FIG. 1 is placed within 20 cm from the balanced two-wire inductive line 10,
The carrier current of the line 10 is electromagnetically coupled to the inductive antenna B1. The transmission/reception selector switch 22 is normally in a receiving state in which the terminal 22a is electrically connected to the terminal 22c. Therefore, the output of the induction antenna B1 passes through the transmission/reception changeover switch 22 and is input to the reception filter 31. The reception filter 31 is a bandpass filter having a center frequency in the carrier wave of the transmission signal sent from the central device 3. The output of the reception filter 31 is amplified by the reception amplifier 32. The carrier detection circuit 33 detects the carrier wave output from the receiving amplifier 32. The AGC circuit 34 controls the amplification degree of the reception amplifier 32 according to the output of the carrier detection circuit 33, and stabilizes the output of the reception amplifier 32.
The demodulator 35 receives the output of the receiving amplifier 32, and
Demodulates audio band signals. Since a paging signal of about 600 Hz is now being received from the central device 3, the demodulator 35 demodulates the paging signal. The low-pass filter 36 passes only signals in the audio frequency band,
Prevents passage of carrier wave components.

The squelch circuit 37 is connected only while the carrier detection circuit 33 is detecting the carrier wave (60KHz), and is disconnected during the period when the carrier wave is not detected by the circuit 33, thereby preventing noise from being output from the speaker 45. I'm here. The calling number identification circuit 39 identifies whether the calling signal matches the unique identification number of the own station (child device). The ringing tone generating circuit 40 generates a ringing tone signal when the calling number identification circuit 39 identifies that the calling signal and the identification number of the own station match. This ringing tone signal is amplified by an audio amplifier 44 and converted into audio by a speaker 45. By the ringing tone output from the speaker 45, a player or a player near the golf cart in which the child device shown in FIG.

After confirming the ringing tone, the player or player on the slave device side presses the press talk switch 14 as a speaker in order to respond to the call from the central device 3. When the pre-talk switch 14 is pressed, the ring tone generation circuit 40 is reset and stops outputting the ring tone. The transmission cutoff circuit 21 is a carrier detection circuit 3
3 is a circuit that prohibits the transmission/reception changeover switch 22 from entering the transmission state during the period when the carrier wave is being detected. When the pre-talk switch 14, the central call switch 12, or the slave call switch 13 is turned on and the carrier detection circuit 33 is not detecting a carrier wave, the transmission cutoff circuit 21 sets the transmission/reception changeover switch 22 to the transmission state.

Now, when the press talk switch 14 is turned on, the terminals 22a and 2 of the transmit/receive switch 22 are turned on.
2b becomes electrically conductive. The response voice uttered by the speaker is converted into an electrical signal by the microphone 11. Microphone amplifier 15 amplifies the audio signal output from microphone 11 . The modulator 19 is a carrier wave oscillator 1
The carrier wave excited at 8 is modulated by the audio signal output from the microphone amplifier 15. The carrier wave oscillated by the carrier wave oscillator 18 has the same frequency (60 KHz) as the carrier wave oscillated by the carrier wave oscillator 58. The output of the modulator 19 is a carrier wave that has been FM modulated with an audio signal, is amplified by a transmission amplifier 20, and guided to the induction antenna B1 via a transmission/reception switch 22.

The transmit/receive switch 62 of the central device 3 is normally in the receiving state. Therefore, the audio modulated carrier wave of the slave device guided to the induction antenna B1 is guided to the balanced two-wire induction line 10, passes through the line coupling circuit 11 and the transmission/reception switch 62, and then passes through the reception filter 7.
I am guided by 1. Circuits 71 to 77 are the same as the circuits 31 to 37 in the slave device shown in FIG. As mentioned above, since the manual call switch 83 is now turned on, the response signal from the slave device demodulated by the demodulator 75 is amplified by the audio signal amplifier 84 and converted into audio by the speaker 85.

Speaker on the central device 3 side (Kyaday master, etc.) who confirmed the response voice output from the speaker 85
press the press talk switch 54, set the transmit/receive switch 62 to the transmit state, and turn on the microphone 5.
Starting from 1, the speaker on the slave device side sends a forecast of thunderstorms and various notifications regarding the progress of play, etc., by voice. This voice on the central device side is frequency-converted by the modulator 59 and transmitted to the child device, as in the case of the child device described above.

The speaker of the slave device who has responded in the manner described above releases the press talk switch 14 after completing the response. When the pre-talk switch 14 is released, the transmission/reception changeover switch 22 goes into the receiving state and the call holding circuit 42 is activated. Call holding circuit 42
is activated when the pre-talk switch 14 or the central call switch 12 is released, or when the slave station call identification circuit 41 identifies a slave station call signal. When the call holding circuit 42 is activated, it outputs a call holding signal for 20 seconds after activation. The AND circuit 38 generates a signal of the AND of the detection signal outputted by detecting the carrier wave by the carrier detection circuit 33 and the communication holding signal. The detection signal is a DC voltage signal, and when this DC voltage exceeds a predetermined value, the logic value of the detection signal is considered to be "1".
The call hold signal is transmitted by the press talk switch 14.
The logic value is "1" for 20 seconds after being turned off.
When the logical value of the output of the AND circuit 38 becomes "1", the automatic call switch 43 is set, and the input terminal and output terminal of the automatic call switch become conductive.
Then, when the logical value of the detected signal becomes "0", the automatic call switch 43 is reset, and the connection between the input terminal and the output terminal is cut off.

Now, if the time from when the slave device transmits the response voice and turns off the press talk switch 14 until it receives the voice signal from the central device 3 is within 20 seconds, then Since the automatic call switch 43 is set, the audio signal from the central device 3 is amplified by the audio amplifier 44 and converted into audio by the speaker 45.

By operating as described above, the central device 3 can call the slave device and make a desired conversation. It is important for this child device to include a call holding circuit 42. Due to the effect of the call hold circuit 42, the slave device does not need a manual switch corresponding to the manual call switch 83 of the central device 3, and the automatic call switch 11 is used instead. Squelch circuit 37
If there is no switch between and the audio amplification circuit 44,
When a call on a common carrier wave is transmitted to the speaker 4 of all child devices
It will be output from 5. If the switch were manual, it would be easy to forget to turn it on only when necessary, making it impractical. Call holding circuit 4
Reference numeral 2 designates a circuit designed with the focus on the fact that the time required for reception is a predetermined short time after the press talk switch 14 is turned off. Call holding circuit 4
2, the central device 3 can reliably communicate with a specific child device without causing any trouble to parties that do not require communication.

When calling the central device from a slave device, turn on the central calling switch 12. When the central calling switch 12 turns on, the calling signal generation circuit 16
is an 8-bit number corresponding to the unique calling number of the central device 3
It sends out an intermittent signal of a binary encoded audio frequency. This intermittent signal is received by the central device 3 in the same way as the voice input from the microphone 11, demodulated by the demodulator 75, identified by the calling number identification circuit 86, amplified as a voice signal by the voice amplifier 84, and then sent to the speaker 85. is output from. speaker 85
After confirming the central ring tone output from the central unit, the radio master, etc. on the central equipment side switches the manual call switch 83.
is turned on, and the press talk switch 54 is turned on to respond. Before that, in the child device, when the central call switch is turned off, the call hold circuit 4
2 has been activated, the response voice of the central device 3 is output from the speaker 45.

A plurality of child devices shown in FIG. 1 can also talk to each other. Child call switch 13 of one child device with which you wish to make a call
When turned on, the slave call signal generation circuit 17 generates an 8-bit 2-bit call number that corresponds to a common call number for all slave devices.
Sends out an intermittent signal of audio frequency encoded in decimal format. This intermittent signal is sent to the demodulator 3 of all other slave devices.
5 and is identified by the slave station calling identification circuit 41 to activate the call holding circuit 42 and put all other slave units into a state in which they can receive audio. in this way,
After all the other child devices are set, the child calling switch 13 is turned OFF and the press talk switch 14 is turned ON for that one child device, and a specific party is named by voice and a predetermined item is conveyed. One of the named parties responds by voice from its child device. Communication between slave devices is useful for inquiring from a trailing party whether or not a shot is possible from a leading party who cannot be seen due to dense fog or the shadow of the terrain.

In the above-described embodiment, the holding time of the call holding circuit 42 was set to 20 seconds, but this value may be changed arbitrarily as necessary. Although other examples are specifically described, these are not intended to limit the present invention.

(Effects of the invention) As described in detail above, according to the invention,
A remote control system that allows communication between a central device that manages the operation of golf carts and golf carts to be performed reliably at any time without interfering with players unrelated to the communication and without requiring the allocation of separate radio frequencies. A controlled traveling golf cart communication device can be provided.

[Brief explanation of the drawing]

FIG. 1 is a block circuit diagram showing a golf cart communication device according to an embodiment of the present invention, FIG. 2 is a block circuit diagram of a central device communicating with the embodiment of FIG. 1, and FIG.
The figure is a timing diagram showing the operation of each part and the time relationship of signals when the central device in Figure 2 calls the slave device in Figure 1, and Figure 4 shows the timing diagram of each part when communicating between two slave devices. A timing diagram showing the time relationship between operations and signals. Figure 5 is a conceptual diagram showing a communication system using a single-wire inductive loop line as a transmission line. Figure 6 is a communication system using a balanced two-wire inductive loop line as a transmission line. FIG. 7 is a conceptual diagram of a communication system that more specifically shows the balanced two-wire guide line of FIG. 6. 38...AND circuit, 39...Calling number identification circuit, 41...Slave station calling identification circuit, 43...Automatic call switch.

Claims (1)

[Scope of utility model registration request] A device that is mounted on a golf cart that travels by remote control along a guidance track installed at a golf course and that communicates with a central device that manages the operation of a plurality of said golf carts using audio signals, records the voice of a speaker. a microphone for converting into an electrical signal; a central paging switch manually operated when the speaker calls the central device; and a central paging switch for paging the central device when the central paging switch is placed in the central device paging state. a circuit that generates a call code; a carrier wave oscillation circuit that generates a carrier wave; receives the call code and the output of the microphone as a modulation signal, and modulates the carrier wave with the call code when the call code is input; a modulation circuit that modulates the carrier wave with the output of the microphone when the call code is not input; a transmission amplification circuit that amplifies the output of the modulation circuit; an induction antenna that is electromagnetically coupled to the guidance line; a pre-talk switch that is set to a transmitting state by a speaker when attempting to make a call to the central device; a pre-talk switch that connects the inductive antenna to a transmitting terminal when in a transmitting state; and a pre-talk switch that connects the inductive antenna to a transmitting terminal when in a receiving state; is connected to a receiving terminal, and the transmitting terminal is connected to the output terminal of the transmitting amplifier; a band-pass filter that receives the signal, a receiving amplifier circuit that amplifies the output of the band-pass filter, a circuit that receives the output of the receiving amplifier circuit and demodulates the voice band signal sent from the central device, and a pass frequency band. is in the voice band and receives the output of the demodulation circuit; an identification circuit that identifies whether or not a predetermined slave station calling signal is present in the output of the low-pass filter; a circuit that generates a ringing tone signal when it is identified that the slave station calling signal is present; a circuit that generates a carrier wave detection signal when the carrier wave output from the reception amplifier circuit has a predetermined intensity; and the press talk. a call holding circuit that holds a predetermined logical value for a predetermined period after the switch is released from the transmitting state and set to the non-transmitting state; an AND circuit that sends out a set signal when a carrier detection signal is received; an input terminal receives the output of the low-pass filter; and when the set signal is received, the input terminal and the output terminal are connected an automatic call switch that is turned off when the carrier wave detection signal disappears, an audio amplification circuit that amplifies the output of the low-pass filter and the ringing tone signal guided through the automatic call switch, and the audio amplification circuit. a speaker for converting the output of the switch into audio; A remote control traveling golf cart communication device comprising: a transmission/reception changeover switch control circuit which sets the transmission/reception changeover switch to the above-mentioned transmission state, and sets the transmission/reception changeover switch to the above-mentioned reception state during other periods.