JPH09156413A - Radio control type drainage pump vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily set channels on the tele-control side and telemeter side respectively without mutual interference, surely and quickly build-up bidirectional communications, and stabilize the built-up bidirectional communications at the no-mutual interference state between the tele-control side and the telemeter side and between this station and another station. SOLUTION: The main communication channel between tele-control transceivers 12, 14 and telemeter transceivers 15, 16 between the control panel 13 and the operating panel 11 of a drainage pump vehicle is set to 10 channels of five groups to have frequency deviations except for the minimum frequency deviation among 40 channels for specific small power communications. The backup communication channel group set to 10 channels of five groups having the frequency deviations except for the minimum frequency deviation among 40 channels for specific small power communications is provided separately from the main communication channel group.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radio-controlled drainage pump vehicle, more specifically, an amphibious vehicle capable of traveling on soft ground, equipped with an engine, a hydraulic pump, and a drainage pump driven by the hydraulic pump. It is possible to remotely control the operation of the drainage pump car through two-way communication of a specific low power radio signal between the drainage pump car and a control panel provided at a position distant from the drainage pump car. The present invention relates to a radio-controlled drainage pump vehicle configured in.

[0002]

2. Description of the Related Art A wireless control type drainage pump vehicle having the above-mentioned structure has been already proposed by the applicant of the present invention in Japanese Patent Application No. 4-33269. Remote control of various operations and operations related to various drainage work on soft ground such as drainage of civil engineering temporary work or water supply and drainage for agriculture, etc., and excellent effect in improving workability and efficiency of the entire predetermined drainage work It has succeeded in making it.

In the wireless control type drainage pump vehicle as described above, a radio signal of a specific low power transmitted from the control panel side is transmitted to the control panel and the control panel on the drain pump vehicle side. The transmitter / receiver for the teleconverter that receives and controls the operation of the engine, hydraulic pump and switching valve of the drainage pump car, and the specific low power radio signal transmitted from the control panel side of the drainage pump car are received on the control panel side. It is equipped with a pair of a telemeter transceiver that checks the operating status of the engine, hydraulic pump, and switching valve of the drainage pump car, and out of 40 channels of specified low power specified by the Radio Law, 1 Up to 20 channels, totaling 20 channels, and totaling 21-40 channels, totaling 20 channels, were assigned for telemetry, and two-way communication was performed alternately.

[0004]

In the conventional radio control type drainage pump vehicle having a pair of the transmitter / receiver for the teleconverter and the transmitter for the telemeter, in which the channels are allocated as described above, between the respective channels on the teleconverter side and the telemeter side. Since the frequency deviation of 1 is as narrow as 12.5 KHz, mutual interference is likely to occur between the teleconverter side and the telemeter side at the start of communication. That is, when the communication between the control panel on the side of the drainage pump car and the control panel is started, first, the radio control unit on the control panel side transmits the radio wave of the channel X of a certain frequency band, and this is transmitted to the drainage pump. The X-channel is selected by searching with the teleconverter receiver on the control panel on the vehicle side, and then the radiometer on the channel Y in a certain frequency band is transmitted from the telemeter transmitter on the control panel on the drain pump vehicle side, and this is sent to the control panel. A communication start-up operation is performed in which the Y-channel telemeter receiver is searched for and the Y channel is selected. At this time, the smallest frequency deviation is X + 12.5 KHz on the channel closest to both the teleconverter side and the telemeter side. Y + 12.5K
Since the frequency becomes Hz, it is possible that each receiver picks up noise and erroneously receives. In particular, the mutual distance between the teleconverter transmitter and the telemeter receiver provided on the control panel side cannot be set too large due to the physical size of the control panel.
Generally, since they are arranged at an interval of about 15 cm to 30 cm, there is a high possibility of erroneous reception due to mutual interference at the time of communication startup. It is difficult to establish the two-way communication, and it takes a very long time to start the communication.

Even after the two-way communication is established, if the combination of the teleconverter side selects 20 channels and the telemeter side selects 21 channels, the frequency deviation between them becomes 12.5 KHz. Noise is picked up by the telecon communication and the telemeter communication interfere with each other, stable two-way communication cannot be performed, and not only drainage work by remote control cannot be performed properly and safely, but also the work efficiency is significantly reduced. There was a problem of inviting.

Therefore, according to the first and second aspects of the present invention, the channels of the teleconverter side and the telemeter side can be easily set without mutual interference to surely and speedily start up bidirectional communication. While you can
An object of the present invention is to provide a radio-controlled drainage pump vehicle that can stabilize two-way communication after establishment of communication without mutual interference between the teleconverter side and the telemeter side and interference with other devices. I am trying.

Further, in addition to the above object, the invention according to claim 3 is to enable stable two-way communication to be maintained irrespective of the fluctuation of the ambient temperature of the work place by the drainage pump vehicle. It is an object.

[0008]

In order to achieve the above object, a radio-controlled drainage pump vehicle according to the invention of claim 1 of the present invention is capable of traveling on a boat-shaped vehicle body and on soft ground. An amphibious vehicle equipped with a device, an engine, a hydraulic pump driven by this engine, and a drainage pump driven by this hydraulic pump. The control panel provided at the above position controls the operation of the engine, the hydraulic pump and the switching valve of the above drainage pump vehicle by receiving a radio signal of specific low power transmitted from the control panel side on the control panel side. The operating condition of the engine, hydraulic pump and switching valve of the above drainage pump vehicle by receiving on the control panel side a radio signal of specific low power transmitted from the transmitter / receiver for the teleconverter and the control panel side of the drainage pump vehicle. In the radio-controlled drainage pump vehicle that is equipped with a transmitter / receiver for checking the telemeter, and is configured so that the operation of the drainage pump car can be remotely controlled through two-way communication by these transmitters / receivers. The main communication channel between the transmitter and the receiver is set to a plurality of channels selected to have a frequency deviation other than the minimum frequency deviation out of 40 channels of specific low power, and the channels are grouped, and separately from the main communication channel group. A channel group for standby communication is provided, which is a group of a plurality of channels selected so as to have a frequency deviation other than the minimum frequency deviation among 40 channels of a specific low power.

That is, according to the first aspect of the present invention, the main communication channels between the pair of teleconverter and telemeter transceivers are among the 40 channels of specified low power specified by the Radio Law. It is possible to set the frequency deviation between each channel on the teleconverter side and the telemeter side sufficiently wider than the minimum frequency deviation of 12.5 KHz because it is set to multiple channels selected from the above and grouped. In addition, it is possible to widen the search channel switching deviation at the time of communication startup on the teleconverter side and the telemeter side, and there is no erroneous reception due to mutual interference at the time of communication startup. In addition, bidirectional communication is stable without mutual interference between the teleconverter side and the telemeter side after communication is established. To. In addition to the main communication channel group, a backup communication channel group is provided, which is grouped by setting a plurality of channels selected from 40 channels of a specific low power like the main communication channel. Therefore, if there are other drainage pump cars that use the frequency of the main communication channel group in the vicinity, carrier sense the channels for the teleconverter and telemeter from the auxiliary communication channel group. It is possible to avoid interference with other drainage pump cars, etc., and to promptly start communication and perform stable two-way communication as described above.

Here, the communication frequency deviation in each of the main communication and standby communication channel groups is
By setting the frequency to 250 KHz or higher, it is possible to sufficiently suppress the occurrence of interference due to the spread of the sideband of the adjacent channel carrier and further stabilize the communication.

[0011] The invention according to claim 3 is based on claim 1.
Alternatively, in the wireless control type drainage pump vehicle according to the item 2, the control panel on the drainage pump vehicle side is provided with a cooler that operates to cool the inside of the panel when the ambient temperature exceeds a predetermined temperature. When the ambient temperature of the working place by the pump car exceeds the predetermined temperature, the cooler is automatically activated to cool the inside of the panel and keep the temperature of the telemeter transmitter, the teleconverter receiver and its surroundings below the predetermined temperature. It is possible to maintain stable two-way communication regardless of the rise fluctuation of

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic side view showing an example of a wireless control type drainage pump vehicle according to the present invention, and FIG. 2 is a system diagram showing an example of a vehicle drive system and a drainage pump drive system. In each of these figures, a drainage pump vehicle is shown. 1 is a closed boat type vehicle body 2
In the amphibious vehicle 1A having a pair of left and right crawlers 3A, 3B as a traveling device capable of traveling on soft ground, the engine 4, the suction port of each of them is the bottom of the boat-shaped hermetic body 2. The two drainage pumps 5A and 5B opening downward, and the engine 4 directly connected to the engine 4
The two hydraulic pumps 6A and 6B driven by the above and a hydraulic circuit 7 using these hydraulic pumps 6A and 6B as a drive source are mounted.

As shown in FIG. 2, the hydraulic circuit 7 includes two hydraulic circuits 7A1 and 7A2 that form a vehicle drive system of the amphibious vehicle 1A and two hydraulic circuit sets that form a drainage pump drive system. And hydraulic circuits 7B1 and 7B2. The hydraulic circuits 7A1 and 7A2 of the vehicle drive system are provided with the first and second hydraulic motors 8A and 8B, and the output shaft of the first hydraulic motor 8A is one of The second hydraulic motor 8B is connected to the drive side wheel of the crawler 3A.
Is connected to the drive wheel of the other crawler 3B.

Further, the hydraulic circuit 7A1, of the vehicle drive system described above.
7A2 and hydraulic circuits 7B1 and 7B of the drainage pump drive system
The opening and closing of 2 is for electromagnetic or electric switching valves 10A, 10B
The switching valve 10A,
As shown in FIG. 3, the switching control of 10B, the operation / stop of the engine 4 and the rotation speed control, the control of the oil flow direction of the hydraulic pumps 6A and 6B, the control of the discharge oil amount, and the like are separated from the drain pump vehicle 1. The transmitter 12 for the teleconverter provided on the control panel 11 installed at the above position and the drain pump vehicle 1
It is designed to be performed via a radio signal of a specific low power transmitted / received to / from a teleconverter receiver 14 mounted on the control panel 13 on the side.

The control panel 13 on the drain pump vehicle 1 side
As shown in FIG. 3, the rotation speed of the engine 4 of the drainage pump vehicle 1, the hydraulic pumps 6A and 6B, and the switching valve 10 are included.
A telemeter transmitter 15 for transmitting a radio signal of a specific low power corresponding to the operating conditions of A and 10B is mounted, and a radio signal transmitted from the telemeter transmitter 15 is attached to the control panel 11 side. The telemeter receiver 16 for receiving the
They are mounted at intervals of about 30 cm, and the operation of the drainage pump car 1 can be remotely controlled through two-way communication by the teleconverter transceivers 12 and 14 and the telemeter transceivers 15 and 16. There is.

Frequency deviations other than the minimum frequency deviation (12.5 KHz) of 40 channels for specific low power communication are used as main communication channels between the teleconverter transceivers 12 and 14 and between the telemeter transceivers 15 and 16, respectively. If a plurality of channels selected so that, specifically, five kinds of channels having channel numbers shown in Table 1 are selected and five groups (1 to 5) and ten channels for main communication are set, In addition to this main communication channel group, five groups (1 to 5) 10 are selected from among 40 channels for specific low power communication, five kinds of channels having channel numbers different from the main communication channel group are selected. A channel group for backup communication of the channel is set. As is clear from Table 1, the frequency deviation between the teleconverter side and the telemeter side is 250 KHz in both the main communication channel group and the backup communication channel group.
In addition, the search channel switching deviation at the start of communication is 50 KHz.

[0017]

[Table 1]

The control panel 13 on the side of the drainage pump car 1 is also provided.
As shown in FIG. 3, the ambient temperature is a predetermined temperature (25
The temperature is set to a range of -30 ° C.) or higher, and a thermoswitch 17 that is turned on is provided, and a cooler 18 that cools the inside of the control panel 13 when the thermoswitch 17 is turned on is provided.

In the radio-controlled drainage pump vehicle constructed as described above, the transceivers 12 and 14 for teleconverters and the transceivers 15 and 16 for telemeters that extend over the control panel 11 and the control panel 13 on the drainage pump vehicle 1 side. The remote control of the operation of the drainage pump car 1 is carried out via the two-way wireless communication by means of to automatically perform a predetermined drainage work.

By the way, in performing the remote control by the radio signal as described above, the main communication channels between the pair of the teleconverter transceivers 12 and 14 and the telemeter transceivers 15 and 16 are set to a specific low power of 40. Not only widening the frequency deviation between each channel on the teleconverter side and telemeter side to 250 KHz by setting 10 channels in 5 groups (1 to 5) selected from the channels, communication on the teleconverter side and telemeter side Search channel switching deviation of 50KH at startup
Since it is widely set to z, there is no erroneous reception due to mutual interference at the time of communication start-up, and reliable and speedy start-up of bidirectional communication is possible, and there is no mutual interference between the teleconverter side and the telemeter side after communication is established. It is possible to stabilize the two-way communication.

In addition to the main communication channel groups, the frequency deviation between the teleconverter side and the telemeter side is 250 KHz, and the search channel switching deviation at the time of communication start-up is 50 KHz. 1
Since there is a 0 channel backup communication channel group, if there are other drainage pump cars that use the frequency of the main communication channel group in the vicinity, from the backup communication channel group It is possible to carry out carrier sense on the channels for teleconverters and telemeters, avoid interference with other drainage pump cars, etc., as well as promptly start up communication and perform stable bidirectional communication. It is possible.

Further, when the ambient temperature of the work place by the drainage pump car 1 becomes higher than a predetermined temperature, the cooler 18 is automatically operated in accordance with the ON operation of the thermostat 17 to cool the inside of the control panel 13. The control panel 1
It is possible to keep the temperature of the transmitter 15 for telemeter, the receiver 14 for teleconverter, and its surroundings provided within 3 below a predetermined temperature, and this is stable regardless of the fluctuation in the ambient temperature of the work place. Two-way communication can be maintained.

[0023]

As described above, according to the first and second aspects of the present invention, the frequency deviation between the respective channels of the teleconverter side and the telemeter side transceivers, which are provided as a pair, is provided. In addition, since it is possible to widen the search channel switching deviation at the time of communication startup on the teleconverter side and telemeter side, there is no erroneous reception due to mutual interference at the time of communication startup, and bidirectional communication startup is reliable and quick. In addition, the two-way communication can be stabilized without mutual interference between the teleconverter side and the telemeter side after the communication is established. Moreover, since a backup communication channel group is provided separately from the main communication channel group, even if there is another drain pump truck or the like using the frequency of the main communication channel group in the vicinity. , By carrying out carrier sense on the channels for the teleconverter and the telemeter from the above-mentioned channel group for preliminary communication, avoiding interference with other drainage pump cars, etc. Two-way communication can be performed. As a result, not only the entire drainage work by remote control using two-way wireless communication can be performed properly and safely, but also a significant improvement in work efficiency can be achieved.

According to the invention described in claim 3, in addition to the effect of the invention described in claims 1 and 2, both stable and stable regardless of the fluctuation of the ambient temperature of the working place by the drainage pump car. The effect that it is possible to hold the outgoing communication is provided.

[Brief description of the drawings]

FIG. 1 is a schematic side view showing an example of a wireless control type drainage pump vehicle according to the present invention.

FIG. 2 is a system diagram showing a vehicle drive system and a drainage pump drive system in the above drainage pump vehicle.

FIG. 3 is a schematic configuration diagram of a transmitter / receiver for a teleconverter and a telemeter in the same drainage pump vehicle.

[Explanation of symbols]

 1 Drain pump car 1A Amphibious vehicle 2 Closed boat type vehicle 3A, 3B Crawler (travel device) 4 Engine 5A, 5B Drain pump 6A, 6B Hydraulic pump 11 Control panel 12, 14 Teleconverter transceiver 13 Control panel 15, 16 Telemeter Transceiver 18 cooler

Claims (3)

[Claims] 1. An amphibious vehicle equipped with a boat-shaped vehicle body and a traveling device capable of traveling on soft ground, equipped with an engine, a hydraulic pump driven by this engine, and a drainage pump driven by this hydraulic pump. The control panel on the side of the drainage pump vehicle and the control panel provided at a position distant from the drainage pump vehicle receive a radio signal of specific low power transmitted from the control panel side on the control panel side, and The transmitter / receiver for the teleconverter that controls the operation of the engine, hydraulic pump, and switching valve of the drainage pump vehicle, and the control panel side receives a radio signal of specific low power transmitted from the control panel side of the drainage pump vehicle, and the above drainage is performed. A transmitter and receiver for the telemeter that confirms the operating status of the pump car engine, hydraulic pump, and switching valve, etc. are installed, and the operation of the drainage pump car is controlled through bidirectional communication between these transmitters and receivers. In the radio-controlled drainage pump vehicle configured to be remotely controllable, the main communication channel between the transceiver for the teleconverter and the transmitter for the telemeter was selected to be the frequency deviation other than the minimum frequency deviation among 40 channels of specific low power. In addition to setting and grouping into a plurality of channels, a plurality of channels selected to have a frequency deviation other than the minimum frequency deviation among 40 channels of specific low power are grouped separately from the main communication channel group. A radio-controlled drainage pump car characterized by having a channel group for standby communication. 2. The communication frequency deviation in each of the main communication channel group and the standby communication channel group is 250 KHz.
The wireless control type drainage pump vehicle according to claim 1, which is set as described above. 3. The radio according to claim 1, wherein the control panel on the side of the drainage pump vehicle is provided with a cooler that operates when the ambient temperature exceeds a predetermined temperature to cool the inside of the panel. Controlled drainage pump car.