JPS627063Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention uses a transmitter that emits ultrasonic waves toward the ground to detect the height of the reaping device above the ground in order to control the cutting height. The present invention relates to a sensor structure for a reaping harvester equipped with an ultrasonic sensor consisting of a receiver for receiving the reflected waves.

[Conventional technology]

Conventionally, in the above-mentioned reaping and harvesting machine, the transmitter and the receiver have been arranged side by side in the lateral direction of the machine body, which has caused the following disadvantages.

[Problem that the invention attempts to solve]

In the case of the above-mentioned ultrasonic sensor, the detection target range is the overlap between the sound wave projectable range and the sound wave receivable range on the ground. For this reason, depending on the placement of the transmitter and receiver, the overlapping range may become elongated in the longitudinal direction of the aircraft, and if there are footprints left in the field from planting seedlings, etc., the detection target area may become elongated. In some cases, the height of the reaping device was detected to be high because the height of the reaping device coincided with the footprint recess and the entire part fell into this recess.

The purpose of this invention is to avoid detection based on the inside of the dent, even if the detection range by the ultrasonic sensor becomes elongated, or even if the detection range matches the remaining footprint dent. The goal is to make it possible.

[Means for solving problems]

The characteristic configuration of the present invention is that in the above-mentioned sensor structure of the reaping and harvesting machine, the transmitter and the receiver are arranged in the longitudinal direction of the machine body, and the functions and effects thereof are as follows.

[Effect]

Even if the overlap range of the sound wave projectable range and the sound wave reception range on the ground is elongated, the arrangement of the transmitter and receiver in the longitudinal direction of the aircraft makes the longitudinal direction of the overlap range the lateral direction of the aircraft. However, even if the detection target range matches the footprint recess, since the footprint recess is generally elongated in the longitudinal direction of the aircraft, a part of the detection target range will be located outside the recess.

[Effect of idea]

Even if the detection target range becomes elongated and matches the remaining footprint dent, part of the detection range is located outside the dent, thereby avoiding height detection based on the inside of the dent. This has made it possible to obtain a highly accurate finish in which the cutting height does not change due to the shape of the detection target area or footprint depressions.

〔Example〕

FIG. 1 is a front side view of a combine harvester, which is an example of a reaping and harvesting machine. The reaping device 1 has a pulling device 2, a cutting blade 3, and a conveying device 4, and a weeding tool 5 (hereinafter referred to as a divider) is provided in front of the pulling device 2. This divider 5 has a shape having a recessed space B on its back side, and an ultrasonic sensor 6 is provided in the upper part of this recessed space B on the back side so as to be completely wrapped around the divider 5. As shown in FIG.
It is integrally fixed to the upper side of the front end which is bent into the shape of letter A.

The ultrasonic sensor 6 consists of a transmitter 8 that emits ultrasonic waves toward the ground and a receiver 9 that receives the reflected waves. By measuring the time from when the ultrasonic sensor 6 emits to when it receives the waves, the height of the mowing device 1 above the ground is detected, and based on the result of this detection of the height above the ground, automatic lifting and lowering control of the mowing device 1 is performed, thereby automatically controlling the mowing height.

The transmitter 8 and the receiver 9 are arranged side by side in the longitudinal direction F of the aircraft, and as shown in FIG.
The range E where the sound wave projection range C, the sound wave reception range C, and the sound wave reception range D overlap on the ground, that is, the range to be detected by the ultrasonic sensor 6 is made to have an elongated shape in the transverse direction of the aircraft body.

FIG. 3 shows another embodiment, in which the front end of the support frame 7 is tilted upward so that the ultrasonic sensor 6
The height above the ground can be detected further forward of the reaping device 1 by installing the reaping device at an angle [see angle θ].

Note that the divider 5 shown in FIGS. 2 and 3 may be supported by a structure in which the lower end portion of the back surface of the divider 5 is supported by the support frame 7, as shown by the dotted line, as in the conventional case.

FIG. 4 is a schematic plan view showing a state in which the sensor is installed, in which the ultrasonic sensor 6 having the configuration shown in FIGS. The installed configuration is shown.

In the drawing, 10 is a cut stem culm, and 11 is an uncut stem culm.

[Brief explanation of the drawing]

The drawings show an embodiment of the sensor structure of the reaping harvester according to the present invention, in which Fig. 1 is a side view of the front part of the combine, Fig. 2 is a partially cutaway side view of the sensor installation part, and Fig. 3 is a separate view. FIG. 4 is a partially cutaway side view of the actual sensor mounting structure, FIG. 4 is a plan view showing the sensor mounting position, and FIG. 5 is an explanatory diagram of the detection target range. 1... Reaping device, 6... Ultrasonic sensor, 8...
...transmitter, 9...receiver.

Claims (1)

[Scope of utility model registration request] An ultrasonic sensor 6 consisting of a transmitter 8 that emits ultrasonic waves towards the ground and a receiver 9 that receives the reflected waves so as to detect the height of the reaping device 1 above the ground in order to control the cutting height. A sensor structure for a reaping and harvesting machine, in which the transmitter 8 and the receiver 9 are arranged in the longitudinal direction of the machine.