JPH0137082B2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a monitoring device for a multi-row seeding machine,
The display lamp blinks during normal sowing to make it easier to visually confirm the sowing status, and also issues a warning to the operator in the event of an abnormality.

With conventional seeding machines, it is not possible to grasp the sowing situation moment by moment during sowing work, so if there are any missing plants, the missing plants must be supplemented after germination, making it impossible to improve the efficiency and precision of the work. Ta. Therefore, a monitor device that can grasp the sowing situation that changes from moment to moment is being considered. However, since normal monitoring devices issue an alarm only when an abnormality occurs, it is not always possible to accurately grasp the sowing situation. In particular, when a failure occurs in the monitoring device, it is not possible to alert only the abnormality.
It was difficult to determine whether normal sowing was a failure or not.

The present invention solves these conventional problems, and is characterized by having a plurality of seed hoppers 1, and feeding out seeds 9 from each seed hopper 1 at intervals of seed fall time. In the multi-row seeding machine, the seed hopper 1 is equipped with a sensor section 10 that detects the falling of seeds from the seed hopper 1, and a detection signal of the sensor section 10 is inputted so that the seed falls over a period of time longer than the seed falling time. Single one-shot circuit 16 that generates a pulse signal with
, an indicator lamp 13 that blinks at a frequency synchronized with the oscillation frequency of the oscillation circuit 17 while the single one shot circuit 16 outputs a pulse signal, and an indicator lamp 13 that operates when the single one shot circuit 16 does not output a pulse signal. The present invention is equipped with an alarm device 14 for

Hereinafter, the present invention will be described in detail with reference to the illustrated embodiment. In FIG. The tool bar 4 is attached to the rear of the tractor via a three-point linkage mechanism (not shown), etc., and in the case of a multi-row seeding machine, the tool bar 4 includes the seed hopper 1 and other parts for the number of rows. only installed. A seeding roll 5 is rotatably provided inside the feeding case 2 in correspondence with the lower end opening of the seed hopper 1, and a recess 6 for feeding is formed on the outer periphery of the seeding roll 5. 7 is an adjustment brush. Reference numeral 8 denotes a sowing duct, which is configured to drop seeds 9 fed out by a sowing roll 5 onto the field for sowing. A sensor section 10 is provided on the lower end side of the feeding case 2 to detect the seeds 9 fed out by the seeding roll.
The sensor section 10 includes a light emitting diode 11 and a phototransistor 12 as a set.

FIG. 2 shows an electric circuit, and 13 is an indicator lamp that flashes during normal sowing, and is mounted on the display panel of the seeding machine or other places easily visible to the operator. Reference numeral 14 denotes a buzzer as an alarm, which is used to warn in the event of an abnormality such as running out of seeds or clogging. 15 is a signal processing unit that determines whether the sowing is normal or abnormal, which includes a single one-shot circuit 16 and an oscillation circuit 1.
7 is an AND circuit 18, 19, a NAND circuit 20,
It is composed of a transistor 21 and the like. The single one shot circuit 16 is configured to generate a pulse signal having a time width longer than the normal seed falling time (for example, 2 seconds) in response to a trigger signal from the phototransistor 12, and the oscillation circuit 17 is configured to generate a pulse signal having a time width longer than the normal seed falling time (for example, 2 seconds). 13. Appropriate time width for flashing (e.g.
It is designed to generate a pulse signal of 0.5 seconds). 22 is a DC power supply.

In the above configuration, during the sowing operation, the sowing roll 5 rotates, and the seeds 9 that have entered the recess 6 are sequentially fed out and sown from the sowing duct 8 into the field. When the seed 9 falls, the phototransistor 12 of the sensor section 10 senses it, and a trigger signal is input to the single one shot circuit 16. This causes the single one shot circuit 16 to generate a pulse signal. The pulse width of this pulse signal is set to be sufficiently longer than the falling pitch of the seeds 9, so during normal sowing, the single one shot circuit 1
6 is at H level, therefore, AND circuit 1
8 is open and the NAND circuit 20 is closed, so the transistor 21 remains off and the buzzer 14 does not operate. On the other hand, since the oscillation circuit 17 is constantly oscillating, while the output of the single one shot circuit 16 is at H level, a signal synchronized with the oscillation frequency of the oscillation circuit 17 is sent to the display lamp 13 via the AND circuit 19. This indicator lamp 13 flashes repeatedly to indicate that normal seeding is in progress. If normal sowing is indicated by blinking in this way, it will be easier to confirm visually compared to normal constant lighting, and even if there are many indicator lamps 13 in the case of multi-row seeding as described later, the abnormality will be detected. It is easy to distinguish the parts and there is no possibility of misidentification.

When an abnormality such as seed shortage occurs, the trigger signal from the phototransistor 12 disappears, so after the pulse signal from the last trigger signal ends,
The output of the single one shot circuit 16 becomes L level, the display lamp 13 stops blinking, the transistor 21 is turned on via the AND circuit 18 and the NAND circuit 20, and the buzzer 14 is activated to alert the operator to the abnormality. do. Therefore, buzzer 1
The occurrence of an abnormality can be known by the alarm 4, and the occurrence of the abnormality can be confirmed by turning off the indicator lamp 13.

Note that the specific configuration of the electric circuit is not limited to the example. In addition to the buzzer 14, an optical means may be used as the alarm.

According to the present invention, there is provided a single one shot circuit 16 which inputs the detection signal of the sensor section 10 for detecting the falling of seeds and generates a pulse signal having a time width longer than the seed falling time, and the single one shot circuit 16. The present invention is equipped with an indicator lamp 13 that blinks at a frequency synchronized with the oscillation frequency of the oscillation circuit 17 while the single one shot circuit 16 outputs a pulse signal, and an alarm 14 that operates when the single one shot circuit 16 does not output a pulse signal. , by using the output of the single one shot circuit 16, the indicator lamp 1 is turned on during normal sowing in which the seeds 9 are dropped at every seed drop time.
3 is blinked at the oscillation frequency of the oscillation circuit 17, and the output of the single one shot circuit 16 is used to operate the alarm 14 in the case of abnormal sowing in which the seeds 9 are not dropped even after the seed drop time has elapsed. be able to. Therefore, by blinking and turning off the indicator lamp 13 and turning on and off the alarm 14, it is possible to clearly and easily know whether the plant is normal or abnormal both visually and aurally, and it is very easy to check the sowing situation. . In addition, in the event of an abnormality, the alarm 14 will alert you and the indicator lamp 13 will turn off, so even with a multi-row seeding machine, you can visually confirm and easily identify the location of the abnormality as well as the fact that the abnormality has occurred. can be judged.

Furthermore, since the output of the single one shot circuit 16 controls the flashing and extinguishing of the indicator lamp 13 and the operation and stopping of the alarm 14, the single one shot circuit 16 can be used to display both abnormal sowing and normal sowing. Therefore, the circuit configuration is as simple as possible, and it is easy to manufacture and can be provided at low cost.
Its practical effects are significant.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a main part showing an embodiment of the present invention, and FIG. 2 is an electric circuit diagram thereof. 1...Seed hopper, 5...Seeding roll, 9...
... Seed, 10 ... Sensor section, 13 ... Display lamp, 14 ... Buzzer, 15 ... Signal processing section, 16
...Single one-shot circuit, 17...Oscillation circuit.

Claims (1)

[Scope of Claims] 1. In a multi-row seeding machine having a plurality of seed hoppers 1, seeds 9 are fed out from each seed hopper 1 at intervals of seed fall time and fall onto a field, the seed hopper 1 A sensor section 10 that detects the falling of seeds from the seed, and a single one shot circuit 16 that receives the detection signal of the sensor section 10 and generates a pulse signal having a time width longer than the seed falling time.
, an indicator lamp 13 that blinks at a frequency synchronized with the oscillation frequency of the oscillation circuit 17 while the single one shot circuit 16 outputs a pulse signal, and an indicator lamp 13 that operates when the single one shot circuit 16 does not output a pulse signal. A monitoring device for a multi-row seeding machine, characterized in that it is equipped with an alarm 14.