JPH0623707B2 - Test equipment for grain moisture analyzer - Google Patents

Description

TECHNICAL FIELD The present invention relates to a test device in a grain moisture measuring device used in a grain dryer, a grain drying facility, or the like.

[Prior art and its problems]

For example, each sample grain is continuously supplied between a pair of electrode rolls, the sample grain is crushed by this electrode roll forward rotation, and the corresponding converted voltage signal (detection signal) is obtained from the electric resistance value. In the form in which the average moisture value is calculated by calculating the data for each predetermined number of grains by converting it to the moisture value, a unit grain feeding mechanism is provided between the test mouth and the electrode roll portion, and the branching mechanism is provided in this feeding mechanism portion. -If the straw wastes become clogged, the unit grain feeding will be hindered and continuous data cannot be collected, so that the average water content cannot be obtained.

[Means for Solving the Problems] The present invention aims to eliminate the above-mentioned drawbacks by providing the unit grain feeding mechanism with a forward and reverse feed roller.
It is the next technical means. That is, it has a feed roll that feeds out one grain or a predetermined grain to be fed to a pair of electrode rolls while rotating in the forward direction, and obtains a detection signal while crushing each unit grain with the electrode roll. In the grain moisture measuring device for converting the moisture value into a moisture value, a confirmation means for confirming the absence of the detection signal for a certain time or more, a reversing means for interlocking the feed roll in the reverse direction by confirming the absence, and a regular feeding after the reversal. The test device in the grain moisture measuring device is provided with a retry normal rotation means for performing normal rotation of the roll.

[Operation and effect of the invention]

When the measurement of water content is started, the test particles supplied from the test port are fed to the electrode roll portion for each unit particle by the action of the forward rotation of the feed roller. When reaching the electrode roll portion, the test particles are crushed, and a detection signal such as a conversion voltage signal rises from the electric resistance value thereof, and the conversion moisture value can be obtained from the detection signal value. An average moisture value is obtained by obtaining a predetermined number of moisture value data of unit test particles.

The above detection signal should rise at every unit grain feeding timing to be tested by the forward action of the feed roll.If the rise of this detection signal is absent for a certain period of time, it is confirmed and detected and the feed roll is interlocked with the reverse rotation. It After this reverse rotation interlocking, a retry (retry) is performed in the normal rotation, and then the feeding supply state is restored.

In this way, if the detection signal is recognized as being absent for a certain period of time, the feed rolls are interlocked with each other in reverse, so it is possible to eliminate the cause of these clogging in the feed roll part where branching and straw waste are likely to be clogged, and then retry. Normal rotation can automatically return to the proper moisture measurement state, which does not lengthen the measurement time.

In addition, if the absence of the detection signal is constantly monitored and the detection signal is not detected after the first retry forward rotation, if the reverse rotation interlocking / retry forward rotation is repeated, the effect of removing the cause of clogging is excellent. If the number of times is counted and an abnormal signal is output when the number of retries exceeds a certain number of times, it is convenient for early detection of other abnormalities, such as stagnation of test particles at the test mouth and electrode roll failure.

〔Example〕

 An embodiment of the present invention will be described with reference to the drawings.

(1) is a moisture meter attached to the elevator (2) of the circulation type grain dryer, and the test grain intake part communicating with the opening (3) in the elevator (2)
(4) Main body part (7) containing one particle feeding mechanism (5) and paired electrode rolls (6) and (6), reduction part (8) for reducing crushed particles and overflow particles into the elevator (2) Etc.

The single grain feeding mechanism (5) has a feed roll (10) having a spiral groove (9) into which one grain of a test grain can fit, and a transport plate (11) contacting the feed roll (10). ) And the feed roll (1
The test grains received between the spiral groove (9) and the transport plate (11) in the normal rotation (0) of (0) can be transferred one by one along the axial direction (b) of the feed roll (10). It is a composition. The transfer roll 10 has a large transfer start side and a small diameter from the middle part to the transfer end side, and excess test particles can drop downward from the small diameter part. (12) is a guide cylinder arranged to guide and guide the test particles to the transfer start end side of the feed roll (10), (13) is an inclined guide plate continuously provided to the transport plate (11), and the feed roll ( 10) It is possible to receive each of the test particles falling from the terminal end and guide them onto the pair of electrode rolls (6) and (6).

The electrode rolls (6) and (6) are configured to crush the test grain from the above-mentioned one grain feeding mechanism (5) part while rotating (c) (d) at different peripheral speeds.

(14) 'is a motor capable of forward / reverse rotation in which the electrode rolls (6) and (6) and the feed roll (10) are interlocked with each other, and can be rotated by receiving a forward rotation instruction signal or a reverse rotation instruction signal as appropriate.

(15) is a CPU which stores a necessary memory such as a control program and comparison data, and performs various arithmetic logic operations.

In the CPU (15), a converted voltage signal (ER) corresponding to the electric resistance value peculiar to the crushed test grain is supplied to the A / D converter (1
It is AD converted in 6) and input. The signals output from the CPU (15) include the display output of the average moisture value calculated based on the converted voltage signal (ER), the forward / reverse rotation command output of the motor (14) ', and the like.

The CPU (15) mainly has the following functions. That is ,. A moisture measurement start signal is output at a fixed timing and the motor (1
First, the initial reverse rotation command signal is output in 4) ′. ． Then, a forward rotation command signal is output to the motor (14) '. ． The converted voltage signal (ER) that rises each time the test grain is crushed is converted into a moisture value while being compared with the stored contents of the memory. ． 1
The test moisture in grain units is continuously measured for n grains (for example, 32 grains) and converted to calculate the average moisture value, which is output to the display unit (17). ． When the converted voltage signal (ER) does not rise for a certain time (T1) or more while the motor (14) 'forward rotation command signal is being output (detection signal absence confirmation means), the motor (14)' reverse rotation command signal is output. (Reverse rotation means) After a certain time (T2), a retry forward rotation command signal is output to the motor (14) '(retry forward rotation means). ． When the number of retries exceeds a certain number, a sample grain flow abnormality signal is output.

The operation of the above example will be described.

When the grain dryer is started, water content is measured in a preset water content measuring gap. That is, the motor (14) 'is activated at every constant timing, and first receives the initial reverse rotation command signal to guide the guide tube (12) and the grains that are stagnant at the starting end side of the feed roll (10) of the feed roll (10). By reverse rotation, it is transported backwards and discharged downward from the end. Then, the normal rotation measurement signal is sent by the motor (14) ', the normal moisture measurement state is reached, and one test grain newly taken in through the opening (3) of the elevator (2) is fed by the feed roll (10). )
Along with the normal rotation, the particles are received by the spiral groove (9) in units of one grain, fed out and fed to the electrode rolls (6) and (6).

The test particles reaching between the electrode rolls (6) and (6) are crushed by their peripheral speed difference, and the electric resistance value thereof is resistance-voltage converted to obtain a converted voltage signal (ER). The CPU (15) converts the moisture value based on the converted voltage signal (ER), obtains and displays the average moisture value for each predetermined number of particles.

During the above moisture measurement, the test particles are supplied to the electrode rolls (6) (6) at substantially constant intervals and crushed.
If the detection signal, that is, the converted voltage signal (ER) does not rise even after the lapse of a certain time (T1), the motor (1
A reverse rotation command signal is output to 4) ′, and the feed roll (10) and electrode rolls (6) and (6) are interlocked in reverse rotation. Therefore, it is possible to promote the discharge of branch stems / straw scraps that are easily caught in the middle of the feed roll (10) or the lower part of the guide tube (12), and eliminate the cause of clogging.

After the above reverse rotation, the retry forward rotation signal is output and the motor
(14) ′ returns to normal rotation and continues moisture measurement.

If the converted voltage signal (ER) does not rise even after the retry normal rotation, the motor (14) 'reverse rotation interlocking / retry normal rotation is repeated again, and even if the predetermined number of retries is reached, the above signal (ER) still remains. When there is no rise of), an abnormal signal is output to alert the operator. In such a case, an abnormality other than the clogging of the feed roll (10) is conceivable, for example, clogging of the test mouth portion and abnormality of the electrode rolls (6) and (6), which can be quickly dealt with.

[Brief description of drawings]

1 is a front view, FIG. 2 is a side view thereof, FIG. 3 is a block circuit diagram, and FIG. 4 is a flow chart. In the figure, (1) is a moisture meter, (5) is a single grain feeding mechanism, (6) and (6) are electrode rolls, (9) is a spiral groove, (10) is a feed roll, and (11) is a carrier plate, (12) is a guide tube, (14) 'is a motor, and (15) is a CPU.

Claims (2)

[Claims] 1. A feed roll is provided which feeds one grain or a predetermined grain to be fed to a pair of electrode roll portions while rotating in a normal direction, and detects each unit grain while crushing with the electrode roll. In a grain moisture measuring device which obtains a signal and converts it into a moisture value, a confirmation means for confirming the absence of the detection signal for a certain period of time or more, a reversing means for interlocking the feed roll in the reverse direction by confirming the absence, and a regularity after the reversal. Device for a grain moisture measuring device provided with a retry forward rotation means for performing forward rotation of the feed roll of FIG. 2. When the absence of the detection signal is confirmed after the normal rotation of the retry, the feed roll reverse rotation / retry normal rotation is repeated to output an abnormal signal when the number of retries exceeds a predetermined number. A device under test in the grain moisture measuring device according to claim 1.