JPS61243360A - Grain water detection control system for grain particle - Google Patents

Abstract

PURPOSE:To shorten the sampling time with less waste loss of grain particles, by ending measurement when the number of grain particles whose water value is within a reference range reaches a fixed value. CONSTITUTION:Based on a command from a controller 10, a water sensor 1 samples a part of grain particles flowing down a storage chamber 4 to measure the water therein crushing one at a time. A comparator circuit 11 compares the measured values with a reference value to input the results into an arithmetic circuit 15 and sorts the water value based on the reference value, within or outside the reference value. An effective measurement circuit 2 integrates effective water values alone within the reference value and the frequency of occurance and the results of the integration are shown on a display section 14 via a display circuit 13. When the frequency reaches a fixed value M1, the operation of the sensor 1 is stopped via a transmission circuit 16 and a control section 17 and the mean of the effective water values is computed to update the data by a reference value setting circuit 12 with this as new reference value. A total measurement circuit 3 integrates the total frequency of water measurement to be shown on the display section 14 while the sensor 1 can be stopped in linkage when the results reach a specified value N.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a grain moisture detection control system for controlling the detection of grain moisture used in grain driers, grain drying facilities, and the like.

2. Description of the Related Art A moisture sensor is known that detects moisture by extracting a predetermined number of drying grains from a grain dryer.

Problems to be Solved by the Invention When trying to accurately measure the moisture value of each grain during drying, the moisture value often varies significantly depending on the grain, and the detected moisture value When controlling the dryer by It is important that the grain is standard. For this reason, while measuring the moisture content of each grain, if this moisture measurement value is outside the range that is far away from the preset or required moisture value, this moisture value is excluded, This method attempts to adopt only moisture values within a standard range as effective moisture values, but in this method, the test grain must be measured many times and tends to take a long time.

Means for Solving the Problems The present invention provides a moisture sensor (1) that samples each grain from dried grains and detects the moisture content of the sample grains, and a moisture sensor (1) that detects the moisture content of the sample grains. An effective measurement circuit (2) that completes the moisture measurement by obtaining only valid values within a reference range a certain number of times, and when the total number of measurements by this moisture sensor (1) reaches a predetermined number of times that is greater than the certain number of times. The grain moisture detection control system for the grain dryer is configured to include a total measurement circuit (3) for terminating this moisture measurement.

Functions and Effects of the Invention When measuring the moisture content of grains during drying, use a moisture sensor (1
) is activated, the moisture content of each grain is measured from among the grains being dried, and it is determined whether the moisture value of this grain is within the standard range or not. When only the moisture effective value reaches a certain number of grains, this measurement is terminated by the effective measurement circuit (2), but it is difficult to obtain an effective value during this measurement operation, and as a result, the total number of measurements reaches the predetermined number. Then,
This moisture measuring operation is completed by the total measuring circuit (3).

Therefore, when measuring the moisture content of grains, if a valid moisture value cannot be obtained, a large amount of grains will not be sampled more than a predetermined number of times, which will reduce wasteful loss of grains and reduce the amount of grains used. Shorten the trial time.

Errors caused by long-time measurements can be eliminated.

Example In the illustrated example, the grain dryer is provided with a grain storage chamber (4) in the upper part, a ventilation drying chamber (5) in the middle part, a grain collection room (6) in the lower part, and A burner (7) is connected to the - side of the drying chamber (5) to blow hot air, and a suction dust extractor (8) is installed on the other side to allow the hot air to flow down the drying chamber (5). It is configured to heat and dry the grains. (9) is a grain raising machine that receives grain from the grain collecting room (6) and circulates it to the storage room (4).

Moisture sensor (1) and control device (1ω is installed above the burner (7) on the front side of the aircraft.This moisture sensor (1)
Based on the command signal from the control device (lω), some of the grains from the grains flowing down the storage chamber (4) or grains being raised by the grain raising machine (9) are taken as sample grains. This is a device that can be taken in, and the taken grains are crushed one by one and the water content in the grains is measured and detected.

The comparison circuit (11) is a reference setting circuit 0δ to be compared in advance.
While comparing the reference value in the sensor (1) with the measured value by the moisture sensor (1), these signals are input to the arithmetic circuit (1!it) to determine which moisture values are within the range of the reference value and which are outside the range of the reference value. The effective measurement circuit (2)
integrates only the effective moisture values within the range of this reference value, integrates the number of measurements, and displays the total number of measurements of this effective moisture value on the display unit +141 via the display circuit 1131. When the number of times reaches a certain number (M), the operation of the moisture sensor (1) is stopped via the transmitting circuit (IQ) and the control unit (171, etc.), and the average value of the effective moisture values is calculated and a new value is calculated. The reference value is updated using the reference value setting circuit 0.

In addition, the total measurement circuit (3) integrates the total number of moisture measurements made by the moisture sensor (1), and displays this on the display circuit f1.
3) to the display section (14), the number of measurements of the effective moisture value is displayed in parallel with the number of measurements, and the number of measurements is a predetermined number of times (
N), the transmitting circuit flGl and the control unit (1 force, etc.) are used to stop the moisture sensor (1). In this case, the predetermined number of times (N) is, for example, a certain number of times (M). The number is set to be a value larger than the fixed number of times (M), such as an integer multiple.

The control circuit (17) is configured to interlock control the burner (7) of the dryer, the suction dust extractor (8), etc., and increases the amount of fuel supplied to the burner (7) as the drying progresses. It performs controls such as stopping the operation of the burner (7), suction dust extractor (8), etc.

Drying of the grains is carried out by the grain raising machine (9) into the storage chamber (4).
Fill the drying chamber (5) etc. with grains, and dry the drying chamber (5).
The grains are caused to flow down by the feeding mechanism located at the lower end of the grain raising machine (9), and are returned to the storage chamber (4) and circulated from the burner (7) to the drying chamber (5). It is dried by hot air flowing through the vacuum cleaner (8). The moisture sensor (1) detects moisture while taking sample grains out of the drying grains, and compares this with the standard moisture value to ensure that the moisture loss rate of the grains follows a constant curve. Drying is controlled by controlling the burner (7) and the like.

This moisture sensor (1) is operated to periodically measure the moisture content at predetermined intervals during the drying process, and for each moisture period, the moisture content of the grain is measured a certain number of times (CM) or a predetermined number of times (N). Detection takes place. For example, take (M) 10 times (grains), (
N) may be set as 20 times (grains).

When the moisture sensor (1) is activated, every time a grain is sampled from the storage chamber (4), the sample grain is crushed and moisture is detected. This detected moisture value is compared with the standard moisture value set in the standard setting circuit (1), and if the moisture value is within the range of the standard moisture value, the number of measurements is determined as the effective moisture value by the valid measurement circuit (2). This is integrated and displayed on the display section 041, and when a certain amount (M) is reached, the operation of the moisture sensor (1) is stopped and no more test grains are taken out. The average effective moisture value is calculated and
The reference value is updated in the reference value setting circuit f121. Therefore, the first measured moisture content is compared with this updated moisture value as a reference.

In addition, in the total measurement circuit (3), not only the effective measurement moisture but also
The number of measurements for all measured moisture values is accumulated, this number of measurements is displayed on the display section Q4), and while the number of measurements does not reach the fixed number of times (M) of the above-mentioned effective moisture value, the number of measurements (N) is added up. When the moisture sensor (1) is reached, the operation of the moisture sensor (1) is stopped. At this time, the reference value on the reference value setting circuit surface is not updated. In this way, as a processing method when the effective moisture value cannot be collected a certain number of times (M), drying control may be continued as it is until the time of the first measurement, or the same measurement may be repeated again. .

As the drying process progresses, the grain moisture value decreases, and the control circuit (1) increases the fuel of the burner (7) or adjusts the combustion time of the same level as the grain moisture value decreases. etc., so that the moisture drying rate of the grains progresses within a predetermined range.When the moisture content of the grains reaches the final target drying value, these burners (7) or suction exhaust are controlled. Stop the dust machine (8), etc. and finish drying.

In the illustrated example, it is preferable that the measurement timing of the moisture sensor (1) is controlled and interlocked to start the next measurement after a certain period of time has passed since the end of each previous measurement, except for the first measurement. For example, in response to input of a stop signal of the moisture sensor (1) by the transmission circuit (Ie), the timer (1 spring) is activated, and the control interlocking configuration is configured to start the moisture detection of the moisture sensor (1) by the input circuit C! do.

If the measurement start signal is set at regular intervals, the time required for a series of moisture measurements will vary, so the time between each periodic measurement period will change, but the time from the completion of the previous measurement to the next measurement will vary. By determining , stable moisture measurement and moisture calculation can be performed.

Furthermore, when the moisture value in the reference value setting circuit 0 approaches the target dry moisture value, a moisture sensor (
According to 1), the number of measurements during the measurement period is set to a certain number (M
) or a predetermined number of times (N). This increases the number of effective moisture measurements or the total number of measurements when the moisture content is dried close to the target moisture value, resulting in high accuracy. The moisture value may also be measured.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, with FIG. 1 being a control block diagram and FIG. 2 being a partially cutaway side view. In the figure, symbol (1) is a moisture sensor, and (2) is an effective measurement circuit. (3) shows the total measurement circuit.

Claims (1)

[Claims] A moisture sensor (1) is used to sample each grain from dry grains and detect the moisture in this sample grain, and only valid values within a standard range of the moisture detected by this moisture sensor (1) are obtained a certain number of times. an effective measurement circuit (2) for terminating the moisture measurement of the lever; and a total measurement circuit (3) for terminating the moisture measurement when the total number of measurements by the moisture sensor (1) reaches a predetermined number of times greater than the predetermined number of times. A grain moisture detection control system for a grain dryer comprising: