JPS59219687A - Discriminator for immature rice in cereal drier - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention (AlTechnical Field) This invention relates to an immature rice discriminating device for a grain dryer that measures the state of immature rice contained in paddy in order to appropriately set drying conditions during grain drying. .

(bl Prior Art) In conventional grain dryers, the overall moisture content of the paddy in the storage tank is measured to set the drying conditions, and the drying loss rate or hot air temperature is controlled from the moisture content data. ”ζ
there was. However, the paddy dried in the grain dryer is then passed through the rice sorter to remove immature rice with high moisture content, waste rice, etc. The moisture content at the end of drying is lower than the moisture content at the end of drying, which has the disadvantage of often resulting in overdrying.

(B;) Purpose of the Invention This invention was made in view of the above, and it automatically detects the content of immature rice, which is originally removed in a rice sorting machine, during the drying process in a grain dryer. An object of the present invention is to provide an immature rice discriminating device for a grain dryer, which can provide information on the content of immature rice to a drying control section so that grain 6J is properly dried.

(d) Structure of the Invention In summary, this invention consists of two roll-type electrodes that are in opposing contact with each other, and rice grains are continuously dropped between the roll-type electrodes, thereby reducing the moisture content of each rice grain. By installing a moisture needle that measures continuously, moisture content data can be obtained continuously.Furthermore, the dispersion is determined from the data group to determine the number of data with high moisture content exceeding a predetermined deviation range, and the number of data is calculated. The immature rice content rate is calculated from the ratio of the total number of sample data.

(e) Embodiment FIG. 1 is a block diagram of an immature rice discriminating device which is an embodiment of Bago's invention. In the figure, ■ indicates a moisture needle, which is arranged in contact with each other as shown in FIG.
Two roll-type electrodes 10 and 11 having la, an inter-electrode voltage drop detection circuit X2 that detects the voltage drop between the roll-type electrodes 10 and 11, and a voltage drop detection circuit A conversion circuit 13 is included. In FIG. 2, normal paddy 2 usually has a relatively low moisture content compared to immature rice 3, so the li2 of the roll electrode 1011 is
When the paddy 2 enters the +, the output voltage V at that time becomes relatively smaller than the output voltage when the immature rice 3 is held between the roll electrodes 10 and 11. Therefore, the output of the conversion circuit 13 is an analog signal of a different level depending on when the paddy 2 is sandwiched between the rolled electrodes io and t1 and when the unripe rice 3 is sandwiched between the rolled electrodes io and t1. FIG. 3 is a diagram showing the fluctuation state of the output of the conversion circuit 13 when the moisture meter 1 is continuously driven. In the figure, the part indicated by A indicates that immature rice 3 with a high moisture content is sandwiched between the roll electrodes 1,0,11.

The moisture content signal, which is the output of total 1, is digitized by the A/D converter 4 and guided to the CPU 5. CP n5
Then, the moisture content data that is manually input is sampled for a certain period of time or a certain number of times, and the variation in the sampled amount is calculated. Further, a deviation range is determined based on the calculated variation, and the number of data with high moisture content exceeding the deviation range is regarded as corresponding to immature rice, and the immature rice content rate is calculated. In addition, C
The PU 5 is connected in a helical manner to a ROM 6 that defines programs for performing the above-mentioned calculations, and a RAM 7 to which work registers and the like necessary for data processing are allocated. Next, with reference to FIG. 4, the operating procedure for calculating the immature rice content by driving the moisture meter 1 will be explained.

First, the moisture meter 1 is driven in step nl (hereinafter, step ni is simply referred to as ni). The moisture meter 1 is driven by turning on the morph drive section 8 connected to the rotating shaft of the roll-type electrode 10.11. When the drive unit 8 is turned on, the drive shafts 8a and 8b are rotated counterclockwise and clockwise, respectively, and the rolled electrode 10.1 is rotated accordingly.
1 also begins to rotate counterclockwise in the 1 o'clock n] direction. continue,
At n2, the counter N assigned to the RAM 7 is preset to 1, and at n3, the water content data outputted from the A/D converter 4 is solved by one number. Then, it is determined which range the sampled data falls into among a plurality of ranges classified in advance according to a certain size (n4). If we classify the sample data, we will further divide the sample data into n5. At G1 at n6, increment the counter, set the value, and set n=20.
04 Sampling the data and dividing the sample data &-J in this way. Note that G is configured to sample a total of 200 pieces of data, one at a time, until ri = 200, but the number of samples may be greater than this, and the data must be input to the CPU within a predetermined time. The histogram is shown when 200 pieces of data are sampled up to n6 as shown in Figure 5. Figure 1 (13) shows the case where there was almost no rice, and the case where a relatively large amount of immature rice was contained.

n7. In 'nlO, the dispersion of a total of 200 pieces of data sampled up to n6 is determined, and the content of immature rice is calculated from the &f fluctuation. First, the variance σ2 is calculated using n7, and then the deviation σ/rI is set. n is an integer set experimentally in advance, and this deviation width σ/ri-t
- Data of high moisture content exceeding 100% (data corresponding to immature rice. For example, in Figure 5 (A), pl, p2
The data at p3 to p5 in FIG. 5(B) are considered to be data corresponding to immature rice. Then, calculate the number of data (number of samples) NA of high moisture content exceeding the deviation width σ/n (
n9), in FIG. 5(A), NA=p 1+ p
2. In FIG. 5(B), NA=p3+p4→p5. Calculating the total number of data NA corresponding to immature rice,
nlO (NA/N) ×], OO calculation is performed to calculate the immature rice content rate a%, and the process ends. After operating the moisture meter 1 as described below, the content of non-μm rice can be automatically calculated.

If you calculate the content of immature rice as described above, then depending on the size of the content, what is the measured moisture content at the time of grain drying? 111 can be carried out. For example, if the immature rice content rate is 10%, the value obtained by subtracting the moisture content of about 0.2 to 0.4% from the measured moisture content at that time is considered to be the true moisture content, and the immature rice content rate When the moisture content is 30%, if the value obtained by subtracting 1 to 1.2% from the moisture content at that time is treated as the true moisture content, appropriate drying control can be performed for the paddy excluding immature rice. I can do it. In addition, if the average moisture content is calculated from the data in the range from p1 to p5 in Figure 5 and used for drying control, it will be possible to calculate the appropriate moisture content for paddy excluding immature rice in the same way as above. Drying control can be performed. Furthermore, when it is determined that the immature rice content is too large, the moisture content at which it stops during drying is
．． Even if drying is automatically paused for a certain period of time when the moisture content is 5 to 1.0% higher, the moisture difference between grading and immature rice is reduced during the pause period, and drying is then carried out again. good. In this way, when the drying is stopped for a certain period of time, the number of data items in the range p3 to p5 (,1) decreases as shown in FIG. 5(A), not shown in FIG. 5(13).

'By obtaining the content of immature rice in this way, it becomes possible to easily correct the actually measured moisture content and control the tempering during drying.

(As per the first aspect of the f1 invention, according to this invention, the immature rice content rate can be automatically measured when the moisture needle is driven.
By using the immature rice content data, it is possible to easily correct the measured moisture content or control the tempering, thereby preventing overdrying. Furthermore, by dropping the paddy in the storage tank between the two roll-type electrodes, the water content data of each paddy can be obtained continuously f6, which has the advantage of making it very easy to sample the data.

[Brief explanation of drawings]

Fig. 1 is a block diagram of an immature rice discriminator that is an embodiment of the present invention, Fig. 2 is a structural diagram of the roll-type electrode part of the moisture meter, and Fig. 3 is an example of the output signal transition state of the moisture meter 1. Figure 4 is a flowchart showing the operation of the above-mentioned immature rice discriminating device, and Figures 5 (A) and (B) are the histograms of the number of data items with respect to the moisture content when there is almost no immature rice and when there is a large amount of immature rice, respectively. FIG. 1-Water circulation, 10.11-Roll type electrode, 2-Paddy (S,
8. grain), 3-immature rice, 4-Δ/1] converter. Applicant: Kubota Tekko Co., Ltd. Agent: Patent Attorney: Ketsou Komori Figure 1 Figure 2 Figure 3 #5 Leap (A) Jiku/Buno [.し□口] [n3)6 Pi7

Claims (1)

[Claims] (1) Moisture meter that continuously measures the moisture content of each individual paddy by bringing two roll-type electrodes into opposing contact and dropping the paddy between the roll-type electrodes, and digitizing the output of this moisture meter. an A/D converter that samples digitized moisture content data for a certain period of time or a certain number of times, and calculates the variation of the data; Immature rice content calculation means for a grain dryer, which calculates the number of data with a high moisture content exceeding the deviation range, and calculates the ratio of the number of data to the total number of sample data, using the unripe rice level as a ratio. Discrimination device.