JPH0715445B2 - Moisture signal processing device in moisture analyzer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention measures the moisture content of grains being dried in a grain dryer with a single-grain moisture meter and processes the measured moisture signal. The present invention relates to a signal processing device.

(Prior Art) Conventionally, in this type of device, it is determined whether or not the measured moisture value is within an allowable range set up and down around the previously obtained average moisture value. The values were excluded because they were regarded as abnormal data relating to unripened rice that had not been sized, and were not used as the data for calculating the water content obtained this time.

By the way, grain such as paddy dried by a grain dryer is further hulled by a grain huller and sorted into brown rice and hull. Then, at the time of shipment, small rice or immature rice having a size smaller than a predetermined size is removed from the selected brown rice by a sorting machine (rice grader) using a sorting net, and a polished rice of a size larger than a predetermined size is finished rice. I take it out and pack it and ship it.

(Problems to be Solved by the Invention) However, even unripe rice or the like has a large grain size and cannot pass through the sorting net, so that it is not rejected by the sorting machine and is shipped as finished rice. Therefore, when the average moisture content is calculated based on the data processed by the conventional device and the dryer is stopped when the calculated average moisture value matches the stopped moisture value, the stopped moisture value is the moisture value at the time of shipment. There was an inconvenience that it did not match.

Therefore, an object of the present invention is to make it possible to match the moisture content value of the dryer with the moisture content value of the grain at the time of shipping, thereby improving the accuracy of the moisture content of the grain at the time of shipping.

(Means for Solving Problems) In order to achieve this object, the present invention has the following configuration.

That is, the present invention measures the moisture content of one grain of a dried grain and outputs a moisture signal output unit A that outputs a moisture signal corresponding to the moisture content, and a maximum value that detects and stores the maximum value of the moisture signal. A detection storage unit B, a waveform width detection storage unit C that detects and stores the same waveform width of the moisture signal, and the above-described maximum detection value is a tolerance that is set up and down around the moisture value obtained in the previous measurement. An allowable range determination means D that determines whether or not it is within the range, and outputs a first acquisition signal when it is within the allowable range, and if the determination result is outside the allowable range, the detected waveform width indicates grain. Waveform width determination means E that determines whether or not a predetermined value is exceeded according to the minimum value when shipping, and outputs a second acquisition signal when the value exceeds the predetermined value, and the first acquisition signal or the second acquisition signal is output. The maximum value detection storage means The maximum has been that moisture signal consisting of the data capturing means F for capturing for the moisture calculation data.

(Operation) When the measurement of water content is started, the maximum value detection storage means B
Detects and stores the maximum value of the moisture signal, and the waveform width detection storage means C detects and stores the waveform width of the same moisture signal.

The permissible range determination means D determines whether or not the above-described maximum detection value is within the permissible range set above and below the moisture value obtained in the previous measurement, and when it is within the permissible range, the first acquisition signal is determined. Is output.

On the other hand, the waveform width determination means E determines whether or not the above-mentioned detected waveform width exceeds a predetermined value according to the minimum value when shipping the grain, and when it exceeds the predetermined value, outputs the second take-in signal.

The data fetching means F uses the above-mentioned first fetch signal or the second fetch signal.
When the capture signal is output, the maximum value detection storage means B
The maximum value of the moisture signal stored in is taken in as moisture calculation data.

Therefore, at the time of drying, it is possible to take in the measured moisture value of the grain that is packaged and then shipped in the bag.

(Embodiment) FIG. 2 is a block diagram of an embodiment of the present invention.

In the figure, 1 is a pair of left and right measuring electrode rolls, and the grains being dried by a grain dryer are supplied one by one at predetermined time intervals. The grain supplied between the measurement electrode rolls 1 is crushed, and the resistance between the measurement electrode rolls corresponding to the grain moisture at that time is converted into a moisture signal voltage by the resistance-voltage conversion circuit 2.

The waveform width detection circuit 3 detects rising and falling of the moisture signal voltage output from the resistance-voltage conversion circuit 2, and detects the waveform width of the moisture signal voltage from these results. The A / D converter 4 A / D converts the moisture signal voltage output from the resistance-voltage conversion circuit 2.

The reference waveform width switch 5 sets a reference for comparing the waveform widths detected by the waveform width detection circuit 3 as described later. This reference value is the largest grain size among the grains that are rejected after passing through the mesh of the sorting mesh of the sorting machine described above, in other words, the smallest grain size that is packed and shipped. It is a value according to. The CPU 6, for example, performs various calculations according to a predetermined procedure as shown in FIG.
The memory 7 is composed of a read only memory (ROM) that stores procedures for the CPU 6 to perform various calculations and the like, and a random access memory (RAM) that stores various data. Reference numeral 8 denotes a moisture meter motor that drives the measuring electrode roll 1 and the like.

Next, an operation example of the embodiment of the present invention configured as above will be described with reference to FIG.

When the moisture measurement of the grain is started, the pair of left and right measuring electrode rolls 1 and 1 are started to rotate by the driving of the moisture meter motor 8, and the grain is supplied to the measuring electrode rolls 1 and 1 one by one. As a result, the resistance-voltage conversion circuit 2 outputs a moisture signal voltage corresponding to one grain as shown in FIG.

The moisture signal voltage is A / D converted by the A / D converter 4, and the maximum value of the moisture signal voltage is detected from the respective converted values (step S1) and stored in the memory 6.

In parallel with this, the waveform width detection circuit 3 detects the rising and falling edges of the moisture signal voltage, and obtains the period from the rising edge to the falling edge, that is, the waveform width proportional to the grain size. Memory 6
Remember.

Next, whether the maximum value of the moisture signal voltage obtained as described above is within the allowable range a set up and down around the average moisture value m calculated in the previous measurement as shown in FIG. Is determined (step S2), and when it is within the allowable range, the maximum value is stored in, for example, a predetermined area of the memory 6 so as to be taken in as moisture calculation data (step S4). Therefore,
The maximum values of the moisture signal voltages e1, e2, e7 shown in FIG. 4 are taken in as moisture calculation data.

On the other hand, when the maximum value of the moisture signal voltage is out of the allowable range, it is determined whether or not the detected waveform width of the moisture signal voltage stored in the memory 6 exceeds the set value set by the reference waveform width switch 5. The determination is made (step S3), and when the value exceeds the maximum, the maximum value of the moisture signal voltage is taken in as the moisture calculation data (step S4).

For example, as shown in FIG. 4, even when the maximum value is the moisture signal voltage e3, e4, e5, e6 outside the allowable range, the corresponding waveform widths T3, T4, T5, T6 are set values (for example, If the water signal voltage e4, e5 exceeds 4 seconds), it is estimated that the grain having the water signal voltage is a large grain and is not rejected by the sorting net of the sorting machine before being shipped. Therefore, the maximum values of the moisture signal voltages e4 and e5 applied to the grain are taken in as the moisture calculation data.

When the data thus taken in reaches a predetermined amount (step S5), the average moisture value is calculated by a predetermined arithmetic expression based on each of these data (step S6).

In addition, “◯” shown in FIG. 4 indicates a case where data is taken in, and “x” indicates a case where data is not taken in.

In this embodiment, when the maximum value of the moisture signal voltage is out of the allowable range, the size of the waveform width is determined, and when the waveform width is larger than the predetermined value, the maximum value is taken in as the moisture calculation data. I chose However, instead of this, when the waveform width of the moisture signal voltage is larger than a predetermined value, the maximum value of the moisture signal voltage may be fetched as the moisture calculation data regardless of the magnitude of the maximum value.

(Effect of the invention) As described above, in the present invention, the moisture data concerning the grains to be packed in the bag and shipped after drying is taken in without exception. Therefore, the average moisture value is calculated based on these data. , If the dryer is stopped when the average moisture value matches the stopped moisture value, the stopped moisture value can be matched to the grain moisture value at the time of shipment, and thus the accuracy of the grain moisture at the time of shipment can be improved. improves.

[Brief description of drawings]

FIG. 1 is a functional diagram of the present invention, FIG. 2 is a block diagram of an embodiment of the present invention, FIG. 3 is a flowchart showing an operation example thereof, and FIG. 4 is a graph showing an example of a moisture signal voltage. A is a moisture signal output means, B is a maximum value detection storage means, C is a waveform width detection storage means, D is an allowable range determination means, E is a waveform width determination means, and F is a data acquisition means.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Toshihiko Tachibana No. 1 Hachikura, Tobe-cho, Iyo-gun, Ehime Pref.Iseki Agricultural Machinery Co., Ltd. Technical Department (72) Inventor Norimaru Nomaru, No. 1 Yakura, Tobe Town, Iyo-gun, Ehime Prefecture

Claims (1)

[Claims] 1. A moisture signal output means for measuring the moisture content of one grain of a dried grain and outputting a moisture signal corresponding to the moisture content, and a maximum value detection memory for detecting and storing the maximum value of the moisture signal. Means, a waveform width detection storage means for detecting and storing the waveform width of the same moisture signal, and the detected maximum value is within an allowable range set up and down around the moisture value obtained in the previous measurement. If the judgment result is outside the allowable range, the above-mentioned detected waveform width is the minimum when the grain is shipped. A waveform width determining means for determining whether or not a predetermined value is exceeded and outputting a second acquisition signal when the value exceeds the predetermined value; and the maximum value when the first acquisition signal or the second acquisition signal is output. Moisture signal stored in the detection storage means Measuring the moisture signal processing apparatus in moisture meter comprising a capture data capturing means for the moisture calculation data the maximum value.