JPH0664015B2 - Grain state detection device for circulating grain dryer and grain state determination device using the grain state detection device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a grain state detecting device for a circulation type grain dryer and a grain state determining device using the grain state detecting device, and particularly to a simple The grain state detection device of the circulation type grain dryer, which is structurally highly reliable, easy to install, and has a high degree of freedom in position setting, and the signal from the grain state detection device can surely determine the grain state. The present invention relates to a grain state determination device using a grain state detection device.

[Prior Art] A circulation-type grain dryer is one that circulates grains between a storage part, a drying part, and a grain-collecting part in order, and dries the grains in the meantime, and the circulation of grains is delayed. Damaged grains are generated due to alteration such as cracking of the barrel due to overdrying and respiration heat of the grain. For this reason, the dryer is provided with a detection means to detect the grain state. For example, Japanese Utility Model Publication No. 56-61896 and Japanese Utility Model Publication No. 48-4763.
Conventionally, as disclosed in Japanese Patent Publication, a microphone, a micro switch, or the like is provided as a detection means in the middle of grain circulation, and the grain state is detected by the grain collision sound generated during circulation or the grain pressing force during circulation. There is.

[Problems to be Solved by the Invention] However, the one that detects the state of the grain by the microphone has a large operating noise of the dryer, and therefore a circuit for discriminating the operating noise from the grain collision noise generated during circulation is provided. However, there is a problem that the circuit becomes complicated. In addition, the microphone must be provided with a mounting hole in the constituent member of the dryer so as to face the required portion where the grain circulates, in order to properly detect the grain collision sound generated during circulation, and the microphone must be mounted. Therefore, dust and dirt generated during the dry operation,
Straws, etc. enter the microphone and cause performance degradation, resulting in low reliability.Because mounting holes must be formed, the mounting work is complicated, and the mounting position and method are also restricted, and the degree of freedom is limited. There is a low inconvenience.

Further, in the case where the grain state is detected by the microswitch, an operating plate or the like must be provided to activate the contact point by the grain pressing force during circulation, which causes a problem that the structure becomes complicated. Moreover, like the above-mentioned microphone, dust, dust, straw, etc. generated during dry operation intrude from the mechanical operation part of the micro switch, so the dust resistance is inferior and durability such as wear of the operation part due to long-term use is deteriorated. Also has a problem,
Furthermore, there is a drawback that only two states can be detected by turning the contacts on and off.

As described above, the conventional detection means, such as a microphone and a microswitch, have a complicated structure, low reliability, and a problem of durability, and there are inconveniences such as complicated mounting and limited position. As a result, for example, there is a disadvantage that the accuracy of the determination of the grain state, which should prevent the generation of damaged grains due to the retention of the grains, is adversely affected and the accuracy of the determination is impaired.

OBJECT OF THE INVENTION Therefore, an object of the present invention is to provide a grain state detection device for a circulating grain dryer having a simple structure, high reliability, easy installation, and high degree of freedom in position setting, and this grain state detection device. A grain state determination device using a grain state detection device of a circulation type grain dryer that can surely determine the grain state by a signal from, for example, prevent the generation of damaged grains due to the retention of grains Is to realize.

[Means for Solving the Problems] In order to achieve this object, the present invention provides a grain state detection device for a circulation type grain dryer that circulates and dries grains while allowing them to collide. The collision plate made of a plate-shaped member that is one component of the dryer that collides the circulating grains to detect the state of the grains from the vibration caused by the vibration, and the collision plate at the portion where the grains of the dryer circulate. On the outside of the collision plate, in a state in which it can be displaced in the vibration direction of the collision plate, a detection means consisting of a piezoelectric element supported through the space in a sealed space substantially parallel to the collision plate is provided during the circulation of the grain. It is characterized by being provided.

Further, the present invention, in the grain state determination device using the grain state detection device of the circulation type grain dryer for drying while circulating the grain, the grain state from the vibration caused by the collision of the circulating grains. On the outside of the collision plate, which is composed of a plate-like member that is one component of the dryer that causes the circulating grains to detect, and the grains of the dryer circulate, the collision plate In the state that can be displaced in the vibration direction,
A detection means of a grain state detection device, which is formed in parallel with the collision plate in a sealed space and is supported through a space, of a grain state detection device is provided in the middle of circulation of the grain, and the detection device of the grain state detection device is provided. It is characterized in that processing means for waveform-shaping the detection signal input from the device into a DC voltage by the waveform shaping circuit and processing the DC voltage by the control circuit to determine the grain state is provided.

[Operation] According to the configuration of the first aspect of the present invention, a collision plate formed of a plate-shaped member that is a component of a dryer that causes circulating grains to collide with a collision portion of the dryer in which the grains circulate. On the outside of the plate, in a state of being displaceable in the vibration direction of the collision plate, a detection means consisting of a piezoelectric element supported in the sealed space substantially parallel to the collision plate through the space is provided during the grain circulation. It is provided. As described above, since the piezoelectric element having no mechanical operation part can be supported in the sealed space outside the collision plate, the structure is simple, and the durability and dustproofness are high and the reliability is improved. Since the detecting means is provided in the middle of the circulation of the grain so that the grain collides with the collision plate, the mounting is easy and the degree of freedom of the position setting is high. Further, since the plate-shaped member constituting the dryer is used as the collision plate, the collision plate is not particularly required, the degree of freedom of the mounting position can be increased, and the piezoelectric element is provided outside the collision plate at the portion where the grains circulate. Since it is provided, it does not hinder the grain flow.

Further, according to the configuration of the second aspect of the present invention, the detection signal input from the detection means is shaped into a DC voltage by the waveform shaping circuit, and the DC voltage is compared by the control circuit to process to determine the grain state. The processing means for doing so is provided. In this way, since the grain state is determined by processing the detection signal input from the highly reliable detection means, for example, it is possible to determine the grain state in order to prevent the occurrence of damaged grains due to the retention of grains. You can definitely do it.

Embodiments Embodiments of the present invention will be described in detail below with reference to the drawings.

1 to 8 show an embodiment of a grain state detecting device which is a first invention of the present invention. As shown in FIG. 1, the circulation type grain dryer 2 has a storage unit 4, a drying unit 6 and a grain collecting unit 8, and the grains lifted by the grain lifting machine 10 are horizontally fed by the upper transverse feeding mechanism 12. It is sent and dropped in the storage unit 4. After the grains are dried in the drying unit 6, they are fed by the feeding valve 14 in a predetermined amount, collected in the grain collecting unit 8 and fed laterally to the lower part of the fried machine 10 by the lower horizontal feeding mechanism 16, and the lifting is repeated again. Dry while repeating.
In the middle of circulation of the dryer 2, a detecting means 18 of a grain state detecting device for detecting a grain state is provided.

The detecting means 18 of the grain state detecting device is, as shown in FIG.
The housing 20 and the cover 22, and a part of the plate-like member 24 which is one component of the drier 2 in this embodiment, are partially covered with the grain C.
A sealed space 28 is defined as a collision plate 26 that collides with each other. The collision plate 26 may be provided separately from the plate member 24, or may be integrated with the housing 20. In the sealed space 28, a piezoelectric element 30 is sandwiched and supported between the housing 20 and the cover 22 so as to be displaceable in the vibration direction. The piezoelectric element 30 is made of, for example, a sintered piezoelectric material, and has electrodes 32, 32 provided on both sides thereof in order to output electric charges generated by the load of mechanical energy.

The detection means 18 configured in this way is composed of a plate-like member 24 which is one component of the dryer 2 in order to detect the grain state from the vibration caused by the collision of the grain C circulating in the dryer 2. The collision plate 26 is made to face the circulating grain C, and the detecting means 18
Is provided in the middle of the circulation of the grain C. This detecting means 18 is
When the grain C collides with the collision plate 26 and vibrates, the piezoelectric element 30 outputs a voltage as shown in FIG. That is, when the grain C does not collide, a small voltage such as S1 is output or not output, and when the grain C collides, a large voltage such as S2 is output. The detection means 18 detects the grain state based on this output voltage.

Here, the operation of the piezoelectric element 30 will be described. The piezoelectric element 30 is
When a force is applied as mechanical energy as shown by an arrow in FIG. 4, an electric charge is generated, and the electric charge is output as a voltage.
Therefore, when vibration is applied to the piezoelectric element 30 as mechanical energy, an AC voltage is generated according to the strength of the vibration. The frequency is determined by the shape of the piezoelectric element 30, and for example, a voltage having a resonance point is obtained as shown in FIG. When this piezoelectric element 30 is supported so as to be displaceable in the vibration direction and vibration is applied to the piezoelectric element 30 itself or a support that supports the piezoelectric element 30, a cycle T = 1 / f (f is a frequency) as shown in FIG. A damped oscillating voltage is generated. The magnitude of the voltage changes according to the strength of the applied vibration, and at the same time, the vibration frequency is the piezoelectric element.
The resonance frequency component determined by the shape of 30 and the structure of the support is the basic component.

When the vibration for generating such a damped oscillation voltage is continuously applied to the piezoelectric element 30, a large voltage output is continuously obtained as shown in FIG. On the other hand, if the vibration is not applied to the piezoelectric element 30, the voltage becomes small and the output disappears as shown in FIG. Therefore, as shown in FIG. 3, when the grain C continuously collides with the collision plate 26, the detection means 18 continuously outputs a large voltage as a detection signal due to the high frequency component due to the collision. On the other hand, when the grain C does not collide with the collision plate 26, the vibration frequency component due to the operation of the dryer 2 is low, and therefore the detection means 18 continuously outputs or does not output a small voltage as a detection signal.

As a result, the grain state detecting device includes the collision plate 26 and the piezoelectric element.
The state of grain can be detected by the detecting means 18 composed of 30 and. In addition, since the piezoelectric element 30 of the detecting means 18 does not have a mechanically operating portion and is supported in the closed space 28, it has high durability and dust resistance, and can enhance reliability. In order to detect the grain state by the voltage output by this detecting means 18,
The circuit is constructed as shown in FIG. That is, the voltage output from the detection means 18 is rectified by the rectifier circuit 34 and converted by the integrating circuit 36 into a DC voltage according to the strength of vibration (see FIG. 8B), so that the voltage can be easily detected. You can Further, although the output voltage changes depending on the speed and weight of the collision of the grain, the collision plate 25 itself also propagates vibrations, so the collision plate 26
The vibration can be detected even if the piezoelectric element 30 is provided apart from. As a result, the detection means 18 can be increased in the degree of freedom in setting the mounting position and can be easily mounted to the outside. The piezoelectric element 30 is not limited to a sintered body and may be a rubber-like body, and the shape can be variously changed. Further, the detection means 18 is a plate-shaped member that constitutes the dryer 2.
Since 24 is the collision plate 26, the collision plate is not particularly required, the degree of freedom of the mounting position can be increased, and the detection device can be constructed at low cost. Further, the detection means 18, since the piezoelectric element 30 is provided on the outer side of the collision plate 26 at the portion where the grain circulates, does not hinder the flow of the grain, and the reliability can be improved by the dustproof structure, Maintenance and inspection can also be facilitated.

FIG. 9 is a grain state judging device utilizing the grain state detecting device according to the second aspect of the invention, which is provided with processing means for processing the grain state according to a signal inputted from the detecting means 18 of the grain state detecting device. The basic configuration of is shown. In the figure,
18 is a detecting means, 34 is a rectifying circuit, 36 is an integrating circuit, and 38 is a control circuit which is a processing means. As described above, the grain state detecting device detects the grain state by the detecting means 18. The grain state determination device rectifies the voltage which is the detection signal output by the detection means 18 by the rectification circuit 34 which is a waveform shaping circuit and converts the voltage into a DC voltage according to the vibration intensity by the integration circuit 36. In order to shape the waveform and determine the grain condition with the control circuit 38,
For example, processing such as comparison with a reference value is performed. In this way, the grain state determination device processes the determination based on the detection signal input from the highly reliable detection means 18, so that the grain state determination can be reliably performed. By the determination of the grain state determination device, it is possible to control the operation of the dryer 2 according to the state of the grain to obtain, for example, the generation of the damaged grain due to the retention of the grain.

Next, an embodiment of a grain state determination device using the grain detection device according to the second invention will be described.

10 to 14 show a first embodiment of the second invention. The first embodiment is for detecting and determining the stuck state of grain.

In order to detect the stuck state, as shown in FIGS. 10 and 11, the detecting means 18 of the grain state detecting device is set at the highest accumulation height of the grain C in the storage section 4 constituting the dryer 2. To provide. This detecting means 18 is positioned at the maximum stacking height as shown in FIG. 10, for example, and a part of the dryer side plate 40 facing the grain C falling inside the storage part 4 is used as the collision plate 26 and dried. It is provided outside the machine 2. Alternatively, as shown in FIG. 11, the mounting plate 42 is provided at the side plate 40 so as to face the falling grain C in the storage portion 4 while being positioned at the highest stacking height, and a part of the mounting plate 42 is provided as a collision plate. 26 and may be provided on the mounting plate 42.

The detection means 18 of this dry state detecting device is provided on the collision plate 26
When the grains C are accumulated as shown in FIG. 12, the grains C absorb the impact at the time of collision and reduce the output of the detecting means 18. For this reason,
The output of the detecting means 18 changes depending on the thickness t of the deposit as shown in FIG. 13, the output gradually decreases up to a certain thickness, and when the thickness is exceeded, the output sharply decreases. Due to this characteristic, the detecting means 18 detects the stake-in state in at least two states. In this embodiment, the detecting means 18 detects three states as shown in FIG. That is, the detecting means 18 outputs a small voltage or does not output a small voltage like S1 when the grain C is not stretched while the drying means 2 is operating, and when the stretched amount is less than the full amount. When the amount of swelling is full, the accumulated grain C absorbs the impact of collision and outputs a voltage slightly reduced as S3.

As described above, the grain state determination device determines the voltage, which is the detection signal output by the detection unit 18 of the grain state detection device that detects the squeezed state into three states, by the waveform shaping circuit as described with reference to FIG. The waveform is shaped by rectifying it by a certain rectifying circuit 34 and converting it into a DC voltage spread to the vibration strongness by the integrating circuit 36, and the control circuit 38 makes a comparison to determine the squeezed state into three states. That is, the grain state determination device compares the output of the detection means 18 by the control circuit 36 as the processing means and determines which of the stuck states. As a result, the grain state determination device can determine the stake-in state into three states by using the output of the detection unit 18 of the grain state detection device. Therefore, for example, the dryer 2 can be determined according to the determined stake-in state. Can be controlled. Further, since the grain state determination device processes the determination by the detection signal input from the highly reliable detection means 18 as described above, it is possible to reliably determine the stuck state, for example, depending on the stuck state. The operation of the dryer 2 can be controlled to prevent the generation of damaged particles due to overdrying or the like.

15 to 20 show a second embodiment of the second invention. The second embodiment is for detecting and determining the accumulation state of grains.

In order to detect the accumulation state, as shown in FIGS. 15 to 17, the detection means 18 of a plurality of grain state detection devices are provided in the accumulation height direction of the grains C in the storage unit 4 constituting the dryer 2. Set up. These detecting means 18 use, for example, as shown in FIG. 15, a part of the dryer plate 40 facing the grain C falling in the storage part 4 as the collision plate 26 and the outside of the dryer 2 in the stacking height direction. Provide a plurality of them. Alternatively, as shown in FIG. 16, the detecting means 18 provides the side plate 40 with a mounting plate 44 in the stacking height direction so as to face the falling grain C in the storage section 4 and partially mounts this mounting plate 44. A plurality of collision plates 26 may be provided on the mounting plate 44 in the stacking height direction. Further, as shown in FIG. 17, the detection means 18 uses a part of the dryer side plate 40 facing the grain C falling in the storage section 4 as the collision plate 26 and at the outside of the dryer 2 the stacking height. A plurality of detection means 18 provided in the uppermost direction are provided above the position of the maximum stacking height, for example, the upper transverse feeding mechanism.
It may be provided so as to face the 12 outlets.

Thus, the grain state detecting device, by providing the uppermost detection means 18 above the position of the maximum stacking height as shown in FIG. 17, whether the operation of the upper transverse transport mechanism 12 is normal or not. Can be confirmed, and when only the output of the uppermost detection means 48 is large and the output of the other lower detection means 18 is small, it is possible to detect the full accumulation state by hand.

The plurality of detection means 18 are arranged so that the grain C does not accumulate and the collision plate
When 26 is exposed, a larger voltage is output to the grain C that collides with the collision plate 26, and when the grain C accumulates and the collision plate 26 is buried, the grain C absorbs the impact at the time of collision. Outputs a small voltage or stops outputting. By this, each detection means
18, the output can be sequentially decreased from the lower detecting means 18 as shown in FIG. 20, and the deposition state can be detected.

The voltage, which is the detection signal output by the detecting means 18 of these grain state detecting devices, is switched by the switching circuit 46 as shown in FIG. The output of the DC voltage which has been input to the circuit 48 and whose waveform has been shaped is input to the control circuit 38 for comparison in order to judge the deposition state. That is, the grain state determination device outputs a switching signal from the control circuit 38 to the switching circuit 46, sequentially switches each detecting means 18, and outputs the output through the waveform shaping circuit 48 to the control circuit.
38, and the accumulation state of the grain C is determined by comparing the detection means 18 having a reduced output with the detection means 18 having a high output. Alternatively, as shown in FIG. 19, each detecting means is not provided with the switching circuit 46.
It is also possible to determine the deposition state of the grain C by waveform-shaping the voltage output from 18 by each waveform shaping circuit 48 and inputting it to the control circuit 38.

By the way, as shown in FIGS. 15 and 16, in the grain state detecting device, if all the detecting means 18 are provided below the maximum stacking height position, the dryer 2 is operating but the grain C is Since all the outputs of the detecting means 18 become small when the grain C is not stuck, it may be erroneously detected that the grain C is accumulated. Therefore, the grain state determination device uses the detection unit 18 to cause the dryer 2 to
Is operating but the grain C is not stretched, the grain C is stretched but the collision plate 26 is not buried, the grain C is stretched and the collision plate 26 is buried. If so, it is necessary to detect the three states of and perform the determination by the processing means.

Here, as described above, the output of the detecting means 18 changes depending on the deposition thickness of the grain C, the output gradually decreases up to a certain thickness, and the output sharply decreases when the thickness is exceeded. As a result, the detecting means 18 operates the dryer 2 but operates the grain C.
When the grain C is not stretched, a small voltage is output or not output, and when the grain C is stretched but the collision plate 26 is not buried, a large voltage is output and the grain C is stretched. When the collision plate 26 is buried and the collision plate 26 is buried, the impact of the collision is absorbed by the grain C accumulated and a voltage slightly reduced is output.

The grain state judging device determines the voltage, which is the detection signal output by the detecting means 18 of the grain state detecting device for detecting the accumulation state in three states, as described with reference to FIGS.
Then, the waveform is shaped into a DC voltage by the control circuit 38, and the control circuit 38 makes a comparison to determine the deposition state into three states as described above. That is,
The grain state determination device compares the outputs of the detection means 18 to determine which accumulation state. As a result, the grain state determination device is in the piled state, and when the dryer 2 is operating but the grain C is not stretched, the grain C is stretched but the under collision 26 is buried. Otherwise, when the grain C is stretched and the collision plate 26 is buried, it is possible to determine the three states of, for example, the dryer 2 is set according to the accumulation state determined by the output of the control circuit 38. The operation can be controlled.

Further, since the grain state determination device processes the determination by the detection signal input from the detection means 18 of the highly reliable grain state detection device as described above, it is possible to reliably determine the deposition state, for example, the deposition Optimum drying can be performed according to the condition, and damage particles due to overdrying can be prevented in advance.

21 to 27 show a third practical example of the second invention. The third embodiment is for detecting and determining the transportation state of grain.

In order to detect the transport state, as shown in FIG. 21, the grain collecting plate 50 of the grain collecting unit 8 corresponding to the outlet of the feeding valve 14 serving as a transport mechanism that feeds the grain C dried in the drying unit 6 by a predetermined amount. Part of the collision plate 26 is provided, and the detecting means 18 of the grain state detecting device is provided outside the grain collecting unit 8.

The grain C intermittently fed from the drying unit 6 to the grain collecting unit 8 by the feeding valve 14 falls on the grain collecting plate 50 and collides with the collision plate 26.
Clash with. By this collision, the detecting means 18 outputs a voltage as shown in FIG. The grain state judging device rectifies this output by the rectifying circuit 34 constituting the waveform shaping circuit as shown in FIG. 25 (b) and by the integrating circuit 36 as shown in FIG. 25 (c) according to the strength of vibration. The DC voltage is converted into a DC voltage, the waveform is shaped, and the control circuit 38 compares the DC voltage with each other at predetermined intervals to determine the conveyance state. That is, the grain state determination device is the integration circuit
If the output from 36 continues to be high, it is determined that the grain C has fallen from the feeding valve 14 and is being conveyed. On the other hand, when the main force from the integration circuit 36 continues to be low for a predetermined period or more, the grain state determination device determines that the grain C has not fallen from the delivery valve 14 and remains (FIG. 25 (d. ) And Figure 26). The grain state determination device, when determining the retention of the grain C, is a warning means (not shown) such as a buzzer or a lamp.
Is activated to issue a warning to the driver or control the operation of the dryer 2 to be stopped, so that the generation of damaged grains due to the retention of the grains C can be prevented without requiring the driver to constantly monitor the transport state. Therefore, the operation of the dryer 2 can be automatically and safely controlled. Of course, as described above, the detection means 18 of the grain state detection device has high durability and dust resistance, has sufficient reliability, has a simple structure, and has a high degree of freedom in setting the mounting position.

In addition, the transportation state is not limited to the above-mentioned two states, that is, the case where the grain C is transported and the state where the grain C is retained, and the case where the grain C is not stretched and is not transported and the grain C is stretched. It is also possible to judge by detecting from the output of the detecting means 18 in three states, that is, the case where the grains C are conveyed and the case where the grains C are staying. As a result, it becomes possible to more accurately control the operation of the dryer 2 according to the transport state.

The detecting means 18 is provided at the outlet of the lower transverse feed mechanism 16 as shown in FIG. 22 or at the outlet of the upper transverse feed mechanism 12 (not shown) in addition to the outlet of the feeding valve 14. You can also In addition, the detecting means 18 has a thrower 52 as shown in FIG.
Installed at the exit of the dryer, and as shown in Fig. 24, a plurality of dryers 2
It can also be provided at the exit of the hopper 54 or the exit of the belt conveyor 56 when installed. In this way, by detecting and determining the transport state of various transport mechanisms,
It is possible to prevent the generation of damaged grains due to the retention of the grains C, and it is possible to more accurately control the operation of the dryer 2.

[Effects of the Invention] As described in detail above, according to the configuration of the first aspect of the present invention, the dryer is supported so as to be displaceable in the vibration direction inside the sealed space outside the collision plate formed of the plate-shaped members that constitute the dryer. The detecting means including the piezoelectric element is provided in the middle of the circulation of the grain with the collision surface facing the circulating grain. As described above, since the piezoelectric element having no mechanical operation part is supported in the sealed space outside the collision plate, the structure is simple, and the durability and the dustproofness against dust are high, so that the reliability is improved. It can be increased in height, easy to install, and more flexible in position setting. Further, since the plate-shaped member that constitutes the dryer is the collision plate, a collision plate is not particularly required, the degree of freedom of the mounting position can be increased, and the detection device can be configured at low cost, and the grain is Since it is provided on the outside of the collision plate in the circulating portion, it does not hinder the flow of grains, and the dust-proof structure can improve reliability and facilitate maintenance and inspection.

Further, according to the configuration of the second aspect of the present invention, the detection signal input from the detection means is shaped into a DC voltage by the waveform shaping circuit, and the DC voltage is compared by the control circuit to determine the grain state. A processing means for processing is provided. In this way, since the grain state is determined by processing the detection signal input from the highly reliable detection means, it is possible to reliably determine the grain state that should prevent the occurrence of damaged grains. . This makes it possible to control the operation of the dryer according to the grain state.

[Brief description of drawings]

1 to 8 show an embodiment of a grain state detecting device, and
FIG. 2 is a schematic configuration diagram of a circulation type grain dryer, FIG. 2 is a sectional view of detection means, FIG. 3 is an output voltage waveform diagram of detection means, FIG. 4 is a schematic configuration view of a piezoelectric element, and FIG. 6 is an output characteristic diagram of the piezoelectric element due to impact, FIG. 7 is an output characteristic diagram of the piezoelectric element due to impact of the grain, and FIGS. 8A and 8B are circuit configuration diagrams and It is a waveform diagram. FIG. 9 is a circuit configuration diagram and a waveform diagram showing the basic configuration of the grain state determination device. 10 to 14 show a first embodiment of the grain state judging device, FIG. 10 is a schematic sectional view of a dryer in which a side plate is provided with a detection means, and FIG. 11 is a drying in which a mounting plate is provided with a detection means. Fig. 12 is a schematic cross-sectional view of the machine, Fig. 12 is a cross-sectional view of the state in which grains are deposited on the collision plate, Fig. 13 is an output characteristic diagram of the detection means in the state of grain accumulation, and Fig. 14 is a state of grain accumulation. It is an output voltage waveform diagram of a detection means. FIGS. 15 to 20 show a second embodiment of the grain state judging device, FIG. 15 is a schematic sectional view of a dryer in which a plurality of detecting means are provided on a side plate in the stacking height direction, and FIG. 16 is a stacking device. FIG. 17 is a schematic sectional view of a dryer in which a plurality of detecting means are provided on a mounting plate in the height direction, and FIG. 17 is a schematic sectional view of a dryer in which an uppermost detecting means is provided above the maximum stacking height, FIG. 1 is a circuit configuration diagram of a second embodiment of the grain state determination device,
FIG. 19 is another circuit configuration diagram in the second embodiment of the grain state determination device, and FIG. 20 is an output voltage characteristic diagram of a plurality of detecting means provided in the stacking height direction. 21 to 27 show a third embodiment of the grain state judging device, FIG. 21 is a schematic sectional view of a dryer in which a detecting means is provided at the outlet of the feeding valve, and FIG. 22 is provided with a detecting means. FIG. 23 is a schematic side view of a lower traverse mechanism, FIG. 23 is a schematic side view of a thrower provided with detection means, FIG. 24 is a schematic side view of a belt conveyor provided with detection means, and FIG.
(D) is a time chart of each output waveform and determination, FIG. 26 is an output characteristic diagram of the detecting means in the state of transportation of the grain, 27th
The figure is an output voltage waveform diagram of the detection means in the transportation state of the grain. In the figure, 2 is a circulation type grain dryer, 4 is a storage section, 6 is a drying section, 8 is a grain collecting section, 10 is a grain lifting machine, 12 is an upper transverse feeding mechanism,
14 is a feeding valve, 16 is a lower traverse mechanism, 18 is detection means, 24
Is a plate member, 26 is a collision plate, 28 is a sealed space, 30 is a piezoelectric element, 34 is a rectifying circuit, 36 is an integrating circuit, 38 is a control circuit, 40 is a side plate, 42 is a mounting plate, 44 is a mounting plate, 46. Is a switching circuit, 48 is a waveform shaping circuit, 50 is a grain collecting plate, 52 is a thrower, 54 is a hopper, 56
Is a belt conveyor.

Claims (5)

[Claims] 1. A grain state detecting device for a circulation type grain dryer which dries while circulating the grain, wherein the circulating grain is detected in order to detect the grain state from vibration generated by collision of the circulating grain. Outside the collision plate of a collision plate and a grain circulation of the dryer that is a plate-shaped member that is one component of the dryer to be collided, in a state that can be displaced in the vibration direction of the collision plate, Detecting the grain state of a circulation type grain dryer, characterized in that a detection means consisting of a piezoelectric element supported through a space is provided substantially parallel to the collision plate in a sealed space during the circulation of the grain. apparatus. 2. A grain state determination device using a grain state detection device of a circulation type grain dryer that circulates and dries grains while detecting the grain state from vibration generated by collision of the circulating grains. In order to make the circulating grains collide with each other, a collision plate formed of a plate-shaped member that is one component of the dryer and a vibration of the collision plate on the outside of the collision plate at the portion where the grains of the dryer circulate. In a state of being displaceable in a direction, substantially parallel to the collision plate in the sealed space, the detection means of the grain state detection device consisting of a piezoelectric element supported through the space is provided in the middle of circulation of the grain, The detection signal input from the detection means of the grain state detection device is subjected to waveform shaping by the waveform shaping circuit into a DC voltage, and the processing means is provided for processing the DC voltage by the control circuit to compare and determine the grain state. Characteristic recycling grain Grain state determining device using the kernel state detecting device 燥機. 3. A grain state determination device using a grain state detection device of a circulation type grain dryer that circulates and dries grains while causing the grains to circulate and is caused by collision of grains dropped in a storage part of the dryer. Collision plate consisting of a dryer side wall which is one component of the dryer for colliding the grains dropped into the storage section to detect the state of grain infiltration from vibration and the grains of the dryer are dropped. A state of a grain consisting of a piezoelectric element supported outside the collision plate of the storage part in a sealed space, in a state of being displaceable in the vibration direction of the collision plate and substantially parallel to the collision plate through a space. The detection means of the detection device is provided at the highest accumulation height of the grains in the storage section, and the detection signal input from the detection means of the grain state detection device is waveform-shaped by a waveform shaping circuit into a DC voltage. Before comparing the voltage with the control circuit A grain state detecting device for a circulating grain dryer according to claim 2, further comprising: a processing unit that processes to determine a stuck state of the grain dropped into the storage unit. Used grain condition determination device. 4. A grain state determination device using a grain state detection device of a circulation type grain dryer which circulates and dries grains, which is caused by collision of grains dropped in a storage part of the dryer. The collision plate formed of a side wall of a dryer, which is a component of the dryer that collides the grains that are dropped into the storage unit to detect the accumulation state of the grains from the vibration, and the grains of the dryer are dropped. Detecting a grain state, which is formed outside the collision plate of the storage portion and is movably in the vibration direction of the collision plate, and includes a piezoelectric element supported in a sealed space substantially parallel to the collision plate through a space. A plurality of detection means of the device are provided in the accumulation height direction of the grain in the storage part, and the detection signal input from the detection means of the plurality of grain state detection devices is waveform shaped into a DC voltage by a waveform shaping circuit. DC voltage comparison by control circuit 3. A grain state detecting device for a circulating grain dryer according to claim 2, further comprising processing means for performing a process for determining a state of accumulation of grains falling into the storage section. Grain state determination device using. 5. A grain state determination device using a grain state detection device of a circulation type grain dryer that circulates and dries grains, which is caused by collision of grains transported by a transport mechanism of the dryer. The grain of the dryer and the collision plate consisting of a dryer side wall which is one component of the dryer that collides the grain carried out from the outlet of the transport mechanism to detect the transportation state of the grain from vibration. A grain composed of a piezoelectric element that is supported outside the collision plate of the storage part that is dropped in a sealed space in a state that is displaceable in the vibration direction of the collision plate and is substantially parallel to the collision plate through a space. The detection means of the grain state detection device is provided at the outlet of the transport mechanism, and the detection signal input from the detection means of the grain state detection device is shaped into a DC voltage by a waveform shaping circuit, and this DC voltage is compared by a control circuit. Then the carrier 3. A grain using the grain state detection device of the circulating grain dryer according to claim 2, further comprising processing means for processing to determine the transport state of the grain transported by Grain state determination device.