JPS60186745A - Measuring device for water content of grain - Google Patents

Abstract

PURPOSE:To switch kinds of grains even during measuring operation and also prevent the mixture of a different kind of data and clearing due to the switching by storing measurement data on a water content and the corresponding kind of grains and storing and displaying up-to-date data as display data corresponding to the kind of grains. CONSTITUTION:The water content of sample grains is measured by a water content measuring means 2 according to a program in ROM44 and stored temporarily in the RAM46 of a conversion control means 18 through an AD converting circuit 24. Then, the kind of grains is read from a grains kind input means 4. The kind is compared with the kind of grains stored in the RAM previously and converted into measurement data on a corresponding kind, which is stored. The converted data is stored in mean-value and display stored data areas of the water content storage means of the RAM46. This data is displayed on a display device 64 through a display control circuit 48. This is repeated to display the mean value of five measured values corresponding to the kind of grains. Thus, the mixture of a different kind of data and clearing due to switching are prevented.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a grain moisture content measuring device, and in particular, it is possible to switch grain types at any time during moisture content measurement, and this switching allows measurement of different types of grains. The present invention relates to a grain moisture content measuring device that does not cause inconveniences such as values being mixed into the average value or all measured values before switching being ignored.

[Technical Background of the Invention] Conventionally, a moisture content measuring device having a means for measuring the moisture content of multiple types of grains and a means for calculating an average value of the moisture contents measured an arbitrary number of times has been used in combination with both functions due to unnecessary switching of grain types. In order to prevent this, the switchable period is limited as shown in FIG.

FIG. 1(a) shows the measurement flow of a manual moisture content measuring device that requires a measuring operation every time a measurement is performed. (B) The first example in the figure is a device that has a period during which the grain type can be switched from the start of sampling to the end of displaying the measured value, and when changing the grain type within this period, the measured value is converted and displayed. do. The period in which the average value is displayed is not converted even if the value is changed, and there is a warning for this period (Utility Model Showa 5L-1).
No. 98055). In addition, some of the above-mentioned manual moisture content measuring devices have changeover switches such as a measurement switch for commanding execution and an averaging switch.
No. 148656). (a) The second example in the figure is a device that has a period that can be switched only at the time of sampling, and for this switching, the measured value is converted and displayed. For switching after the second measurement, in order to prevent the measurement values of different types of grains from being mixed into the average value, all the measured values before the switching are canceled and the measured values at the time of switching are used as the new measurements for the first measurement. It is treated as a measured value.

FIG. 1(B) shows the measurement flow of an automatic moisture content measuring device that continuously measures an arbitrary number of times, and the hardware allows measurement of multiple types of grains. In the hardware method, the constants of the linearization circuit are changed to obtain the moisture content suitable for the type of grain by switching the circuit elements of the measurement circuit using a changeover switch or the like. The period during which the grain type of this device can be changed is during measurement, and as the grain type is selected, the constants of the linearization circuit are changed, and the conversion of the measured value is performed in response to the change during continuous measurement. Each will be done.

[Problems with Background Art] However, in these conventional moisture content measuring devices, selection of the grain type is performed manually, and therefore, erroneous operation may occur, and in such cases, the following inconveniences occur. In other words, (a) In the first case of the mouthpiece, even if an erroneous operation is noticed, it is not possible to switch the grain type while the average value is being displayed, and if the grain type is switched during the second measurement, the first measurement remains the same and the grain type is Since the second measurement value is converted in accordance with the switching, there is a disadvantage that the average value is an average value containing the measurement values of different types of grains.

(B) In the second example in the figure, if you notice an erroneous operation and switch after several measurements, the measured value before switching is lost, so you have to start a new measurement from the first time, which is time-consuming. .

Furthermore, as in the first example, the automatic device shown in Figure (b) cannot be switched while the average value is being displayed, and the measurement value of different grains may be mixed into the average value when switching at the time of measurement. have.

Therefore, with conventional moisture content measurement devices, the period during which grain types can be changed is limited, and if the grain type is changed during measurement, the measured value of a different type of grain may be mixed into the average value, or all measured values before the change are lost. There were other inconveniences.

[Purpose of the Invention] Therefore, the present invention makes it possible to change the type of grain at any time during moisture content measurement, and also prevents the measurement value of a different type of grain from being mixed into the average value due to the change, and the measurement value before the change being completely invalidated. It is an object of the present invention to realize a moisture content measuring device for grains that does not cause inconveniences such as moisture content.

[Structure of the Invention] In order to achieve this object, the present invention provides an apparatus for measuring moisture content of a plurality of types of grains having a means for measuring the moisture content and a means for calculating an average value. a moisture content measuring means for converting into measured value data of moisture content; a grain type input means for generating a grain type signal of the grain to be measured;
moisture content storage means for storing measured value data, average value data, and display data; grain type storage means for storing the grain type; and averaging for calculating an average value from the average value data and using it as average value data. a value calculation means, converting the measured value data for each measurement into data corresponding to the initially set grain type, and sending each converted data and grain type to the moisture content storage means and the grain type storage means; a conversion control means for storing and converting the display data into data corresponding to the latest set grain type when displaying the measured value and the average value using the display data;
It is characterized by comprising a display control means for reading the display data and outputting a display signal to the next stage, and a display means for inputting and displaying the display signal.

[Embodiments of the invention] Next, embodiments of the present invention will be described in detail based on the drawings.

2 to 5 show embodiments of this invention.

In FIG. 2, 2 is a moisture content control means, 4 is a grain type input means, 6 is a moisture content storage means, 8 is a grain type storage means,
10 is an average value calculation means, 12 is a conversion control means, 14 is a display control means, and 16 is a display means. Among these, the moisture content storage means 6, the grain type storage means 8, the average value calculation means 10
, the conversion control means 12, and the display control means 14 are configured as a micro:1 viewer 18 for control.

Each of these functions will be explained. The moisture content measuring means 2 includes:
The electrical signal generated between a pair of electrodes is converted into water content measurement data. The grain type input means 4 selects the grain to be measured and inputs the grain f! corresponding to the type. generates similar signals. The moisture content storage means 6 stores the measured value data of the moisture content obtained by the moisture content measuring means 2, the average value data for each measurement for calculating the average value, and the data for displaying the average value or the measured value. The display data of the average value or the measured value is recorded (, 1).The grain type storage means 8 stores the grain type corresponding to each data in the moisture content storage means 6, and the grain type input from the grain type input means 4. The average value calculation means] 0 inputs the average value data of the moisture content storage means 6, calculates the average value, and outputs it as average value data.The conversion control means 12,
First, at time tl shown in FIG. 1, a signal of the first grain type is input from the grain input means 4 and is stored in the grain type storage means 8. The measured value data of moisture content for each measurement is
The data is converted into data corresponding to the initially set grain type and stored in the moisture content storage means 6 as average value data and display data. The measured value data for each measurement is output as display data by the display control means 14, but when the grain type is switched at time t2 in FIG. The grain type signal and the grain type of display data are stored in the grain type storage means 8.
Read from and compare. If the grain types are different in this comparison, the data is converted into data corresponding to the most recently set grain type and displayed data, and stored in the moisture content storage means 6. It is stored in the type storage means 8. Further, the conversion control means 12 stores the average value data input from the average value calculation means 10 as display data in the moisture content storage means 6, and also stores the grain type in the grain type storage means 8. Display control means 1
4 reads display data from the moisture content storage means 6 at time t2 and outputs a display signal to the display means 16 to display the moisture content.

These moisture content measuring means 2 to microcomputer 18 have a circuit configuration as shown in FIG. In the figure, 20
are a pair of electrodes that measure the electrical resistance by crushing and sandwiching sample grains; a constant is set according to the grain type, and a resistance/voltage conversion circuit 22 composed of a nearing circuit generates a voltage between the electrodes 20 according to the grain type. Convert the resistance value to voltage. The A/D conversion circuit 24 receives the voltage from the resistance/voltage conversion circuit 22 and converts it into a digital signal. These electrodes 20
, a resistance/voltage conversion circuit 22, and an A/D conversion circuit 24.

Reference numeral 26 denotes a grain type setting switch in which a contact such as a rotary switch corresponds to the grain type, and 28 denotes a multiplexer that converts the contact signal from the setting switch 26 into a grain type signal and outputs it to the input data Hanofa 56, which will be described later. Yes, these setting switches 26 and multiplexer 28
The grain type input means 4 is configured as follows. This multiplexer 28 includes a stop moisture content setting switch 30 for setting the stop moisture content of the dryer (not shown), and a group of glue mint switches for detecting the position of a drive motor (not shown) that connects and separates the electrode 20. Signals from 32 are also input. In addition, 34 is a switch for Nast operation command;
Reference numeral 6 denotes a clock oscillation circuit that oscillates a reference clock for timing the control of timers and others. The above constitutes an input section of the control means.

The microcomputer 18 is configured as follows. That is, there is an arithmetic processing unit 38 that temporarily stores various data and performs various arithmetic processing and control with the sister, a timer circuit that can freely set the time according to instructions from the arithmetic processing unit 38, and an arithmetic processing unit that controls the completion of the timer operation. a timer interrupt control circuit 40 consisting of a circuit that issues an interrupt command to the A/D conversion circuit 24 , a circuit that instructs the A/D conversion circuit 24 to start A/D conversion in response to a command from the arithmetic processing unit 30 , and a circuit that instructs the A/D conversion circuit 24 to start A/D conversion according to a command from the arithmetic processing unit 30 , and a circuit that instructs the A/D conversion circuit 24 to start A/D conversion based on a command from the arithmetic processing unit 30 ;
The A/D conversion interrupt control circuit 42 includes a circuit that issues an interrupt command to the A/D conversion interrupt control circuit 42.

Furthermore, a read-only memory (hereinafter referred to as ROM) 44 that stores a measurement program in advance, and a plurality of read-only memories (ROM) 44 that temporarily store input data such as average value calculation results and moisture content and grain type by the arithmetic processing unit 38 are provided. A readable and writable data random access memory (hereinafter referred to as RAM) 46 consisting of a storage area, and an arithmetic processing unit 3
A display control circuit 48, which is a display control means 14, includes a decoder that converts each water content data sent from 8 into a display signal, and a drive circuit that drives a display 64, which will be described later.
Input data Hanofa 54 and 56 temporarily store data from the AID conversion circuit 24, multiplexer 28, and test switch 34 according to commands from the control signal line 50 from the arithmetic processing unit 38 and output them to the input data hash 52, respectively.
．． 58 and an output data buffer 62 that temporarily stores output data transmitted from the arithmetic processing unit 38 via the output data path 58 in response to a command from the control signal line 50 of the arithmetic processing unit 38.

The display control circuit 48 of this microcomputer 18 is
Numerical values are displayed on a display 64 serving as the display means 16 to display various data on moisture content, and a relay driver 66 drives a group of relays 68 for stopping the motor and fuel, etc. according to the data temporarily stored in the output data buffer 62. . In the figure, 70 is a ROM address bus for transmitting address data from the arithmetic processing unit 38 to the ROM 44, 72 is a ROM data bus for transmitting program data to the arithmetic processing unit 38, and 74 is a timer interrupt control circuit from the arithmetic processing unit 38. 40
a timer interrupt control signal line for transmitting a timer start command signal to the arithmetic processing unit 38 and a timer interrupt signal to the arithmetic processing unit 38;
76 is the A/D conversion interrupt control circuit 4 from the arithmetic processing unit 38.
A/D conversion conversion to 2 - Ku 1 signal and arithmetic processing unit 3
This is an A/D conversion interrupt signal line that transmits an A/D conversion interrupt signal to 8.

FIG. 4.5 is a flowchart showing the operation of this embodiment. FIG. 4 shows a flowchart 1- for controlling a series of operations, and FIG. 3 is a flowchart for processing. Note that the period is set to, for example, the lighting time of one digit of a dynamically driven numeric display.

The operation will be explained with reference to FIG. When the power is turned on, R
Start according to the program stored in OM44. A sample grain is sampled, crushed and held between a pair of electrodes 20, and measured. The measurement is performed by detecting the voltage as a voltage in the resistance/voltage conversion circuit 22 according to the grain type using a constant set by the linearization circuit, and then detecting it as a voltage in the A/D conversion circuit 24.
convert it into a digital signal. This signal is temporarily stored in the moisture content register ↑, 0 means 6 of the RAM 46 as measured value data of the moisture content.

Next, the grain type selected by the grain type input means 4 is read. This is the reading of the initially set grain type shown at time t1 in FIG. 1 at the time of the first measurement. The grain type signal generated by the multiplexer 28 is input, and the RAM 46
Temporarily stored in the grain type storage means 8.

Next, it is determined whether or not this is the first measurement. Here, the first
This will be explained as the second measurement.

The grain type of the constant set by the linearization circuit, that is, the grain type of the measured moisture content, is compared with the grain type temporarily stored in the RAM 46, which is initially set by the grain type input means 4, and the grain type is initially set. Determine whether or not to convert the measured value data to the grain type.

If the grains are of the same type, proceed to data storage. If it is a different type of grain, the measured value data is converted into data corresponding to the grain type set at the beginning of time t1.

The measured value data converted to the initially set grain type is stored in the average value data storage area and the display data storage area of the moisture content storage means 6 of the RAM 46 as average value data and display data, respectively. Furthermore, the grain type corresponding to each of these data, that is, the signal of the grain type initially set by the grain type input means 4, corresponds to the measured value data, average value data, and display data of the grain type storage means 8 of the RAM 46. The data is stored in the specified storage area.

Next, the first moisture content measurement value is displayed. The display is performed according to the program shown in FIG. 5, and the stored display data is displayed by proceeding with the YES step. The switching of the grain type displayed will be described later.

After this display, it is determined whether or not the five measurements have been completed. Assuming it is not finished, go back to the sampling step. The steps including sampling, measuring, grain type g 8ft are carried out as above.

Next, since this is the second measurement, proceed to No.

At the first time, using the data storage step knob, read the grain type signal stored in the storage area of the grain type storage means 8 of the RAM 46 in correspondence with the measured value data, that is, the grain type signal set initially, and read this signal. The second moisture content measurement value data is converted into data corresponding to the grain type indicated by .

This converted measurement value data is stored in RAM4 in the same way as above.
The average value data and the display data are stored in the average value data storage area and the display data storage area of the moisture content storage means 6 of 6, respectively, and the grain type of the average value data and display data, that is, the The set grain type is stored in the storage area of the grain type storage means 8 of the RAM 46 corresponding to the measured value data, average value data, and display data.

Next, the display data is displayed on the display 64. After displaying,
It is determined whether the five measurements have been completed, and if NO, the same steps as above are executed.

If YES, proceed to the step of calculating the average value.

The average value calculation is an operation in which the sum of the data of the five measurements for the initially set grain type stored in the average value data area of the moisture content storage means 6 of the RAM 4.6 is divided by five. The sum of data in the average value data area may be stored for each measurement, and the sum may be divided by five.

The average value data obtained by this calculation is stored in the display data area of the moisture content storage means 6, and the signal of the grain type corresponding to the grain type in the average value data area is stored in the grain type storage means corresponding to the display data area. It is stored in the storage area of means 8.

Next, this average value data is displayed, and the display will be described later.

As you can see from the above operations, the measured value data of moisture content for each measurement is converted to the grain type initially set in the first measurement and becomes average value data and display data. is also calculated based on the grain type set at the beginning of time tl and becomes display data.

Next, it is determined whether or not to stop the dryer. In this case, when the average value data becomes equal to or less than the stop moisture content set in advance by the stop moisture content setting switch 30, it is determined that the dryer is stopped, and the dryer is stopped and the operation is completed.

If the stop moisture content has not been reached, the waiting time until the next automatic measurement is determined, and when the waiting time ends, the process returns to the sampling step and the above-mentioned operations are performed. Note that during the waiting time, the display 464 displays the average value.

Next, timer interrupt processing by the timer interrupt control circuit 40 will be explained with reference to FIG. This operation is executed by a timer interrupt signal generated by the timer interrupt control circuit 40 after a certain period of time has elapsed.

After completing a series of operations, conversion control begins.

First, it is determined whether or not it is being displayed. This is determined by, for example, a flag indicating that the measured value of the moisture content is displayed or the average value is displayed. If it is being displayed, the grain type set at that time, that is, the latest grain type is read and input into the grain type storage means 8 of the RAM 46.

Next, compare the latest input grain type signal with the grain type corresponding to the displayed data, switch the grain type setting at time t2 during display, and if they are different, data corresponding to the latest switched grain type. Convert the displayed data to . If the grain types are the same, proceed to step 2 of the white light on the display.

The display data converted to the latest grain type is stored again in the display data area of the moisture content storage means 6, and the converted grain type, that is, the latest grain type, is stored in the grain type storage means 8 corresponding to the display data. Store in area.

Next, the display 64, which had been lit until then, is turned off, and the digits are displayed based on the converted display data. This display is performed by sequentially lighting up the data of the necessary digits from the display data area.

After performing the necessary processing for display, the process returns to the interrupted step in FIG.

As shown in below, when displaying the average moisture content value or each measured value, a timer interrupt processing program that is executed periodically changes the displayed data according to the change in grain type setting. The data is converted to correspond to the latest grain type that has been switched, and the data is newly displayed. The period of this timer interrupt and the time required for conversion are several m5ec, and are instantaneously executed.

To summarize the operation of the flowcharts in Figures 4 and 5 above, the measured value data of the moisture content measured for each measurement is converted to the grain type initially set at time t1 in the first time, and the average value data and This display data is used as display data, and this display data is displayed each time it is displayed.

In this case, the grain type in the displayed data (i.e., the first grain type read in the measurement at the first time t1) and the latest grain type displayed at the time of display are different due to the setting change. Then, the timer interrupt control circuit converts the displayed data into data corresponding to the latest grain type and displays the converted display data, so it can be instantly converted and displayed according to the grain type. will be done. Further, even if the setting of the grain type is switched during display, that is, at time L2, the latest grain type is input and converted by the timer interrupt processing, so display data corresponding to the grain type is displayed.

The average value is also calculated from the average value data obtained at time t1, that is, with the grain type initially set in the first measurement. Since the displayed data is converted into data corresponding to the latest grain type switched by the interrupt processing, the average value that is not mixed with the measured values of different grains is displayed corresponding to the latest set grain type.

Therefore, no matter when you change the grain type settings, the measured values will be converted and displayed according to the grain type, and the average value will also be converted and displayed without mixing the measured values of different types of grains. display becomes possible.

In the example, the grain type is read during the first measurement, that is, at time t1, and during the display, that is, at time t2. The calculation time of this average value may be set as tl, and the display time may be set as t2.

Further, at this time, the set stop moisture content may be converted to the setting of the grain type and compared without converting the average value to the different type of grain. In short, the time t1 is a time during which the measured value of the moisture content of the different type of grain is not mixed into the average value, and the time t2 may be the time during the display.

Furthermore, in the example, each data is converted as needed, but this conversion is performed by converting each data into each grain type and storing it in each data storage area for each grain, and then converting the stored data at the time of conversion. You can also read it. That is, the expression "conversion" can also be interpreted as a process of reading data corresponding to each grain type calculated and stored in advance from the moisture content storage means.

[Effects of the Invention] As described above, according to the present invention, no matter when the type of grain is switched, the data can be converted to the type of grain by the conversion control means and displayed. Moreover, since the average value is calculated and converted using the average value data stored for the same grain type, there is no problem of the average value being mixed with the measured values of different types of grains, and there is no need to cancel the measured values due to switching. Therefore, there is no inconvenience of redoing the measurement.

[Brief explanation of the drawing]

FIGS. 1(A) and 1(B) are diagrams showing the measurement flow of a conventional moisture content measuring device. 2 to 5 show an embodiment of the present invention, in which FIG. 2 is a schematic block diagram, FIG. 3 is a schematic block diagram of a circuit, and FIGS. 4 and 5 are flowcharts 1 and 5, respectively. In the figure, 2 is a moisture content measuring means, 4 is a grain type inputting means, 6 is a moisture content storage means, 8 is one stage of grain type storage, and 10
12 is a conversion control means, 14 is a display control means, 16 is a display means, 18 is a microcomputer, 38 is an arithmetic processing unit, 40 is a timer interrupt control circuit, 4
2 is an A/D conversion control circuit, 44 is a read-only memory,
46 is a random access memory, 48 is a display control circuit,
64 is a numeric display. Agent Patent attorney Yoshimi Saigo Patent attorney Yukio Harada ~ Patent attorney Tadashi Harasaki Figure 4 Figure 5

Claims (1)

[Claims] In a moisture content measuring device having a moisture content measuring means for multiple types of grains and an average value calculating means, the moisture content measuring means converts an electric signal generated between a pair of electrodes into moisture content measurement value data, and a grain to be measured. grain type input means for generating a grain type signal; moisture content storage means for storing fill constant value data, average value data, and display data; grain type storage means for storing the grain type; An average value calculation means that calculates an average value from the data to obtain average value data, and converts the measured value data for each measurement into data corresponding to the initially set grain type, and each data and grain type after conversion. conversion control for storing in the moisture content storage means and the grain type storage means, and converting the display data into data corresponding to the latest set grain type when displaying the measured value and the average value using the display data; 1. An apparatus for measuring moisture content of grains, comprising: means for measuring the moisture content of grain; display control means for reading the display data and outputting a display signal to the next stage; and display means for inputting and displaying the display signal.