JPH0758328B2 - Cockroach detection device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cockroach detecting device.

[0002]

2. Description of the Related Art Cockroaches have been exterminated or their occurrence has been prevented in places where it is necessary to maintain a hygienic environment, such as a kitchen or a food processing factory. Conventionally, removal of cockroaches <br/> was done by spraying the killing agents capable generated cockroaches. In addition, prevention of cockroach outbreak is
It was carried out by regularly spraying a drug capable of killing cockroaches, which is expected to occur.

[0003]

In recent years, the influence of food additives contained in foods, chemicals mixed in the manufacturing process, etc. on the human body has become a problem, and food additives such as pesticide-free vegetables and synthetic colorants have been added. Foods that do not use any products are produced or manufactured. In such a situation, the conventional method for preventing the cockroach outbreak, which regularly sprays the drug, does not quantitatively grasp the number and location of the cockroaches expected to occur. The spraying range and the spraying range sometimes deviate greatly from the necessary and sufficient spraying amount and the spraying range, and the following problems occur.

When the spray amount is excessive, the concentration of the chemical substance contained in the drug remaining in the air becomes higher than necessary, and the food or the worker is contaminated with the chemical substance in an excessive amount. When the application range was wider than necessary, chemicals contaminated foods or even workers who had no effect if the application range was sufficient.

Further, in order to avoid the above-mentioned contamination, it is sometimes necessary to perform a predetermined period of time, evacuation of food and manufacturing equipment, stop of work, and further work of removing residual chemical substances. It was On the other hand, if the amount of application was too small or the application range was narrower than necessary, the insecticidal effect could not be sufficiently obtained and the cockroaches could not be exterminated.

[0006] In addition to the disadvantages mentioned above, the presence of cockroaches, because it was confirmed by visual observation of the worker, the timing, etc. to the worker, such as location and holiday invisible under the floor or shadows, etc. can not be monitored, the presence of cockroaches There were things I couldn't confirm. In order that the distribution and cockroaches <br/> following drug spraying, distribution of cockroaches for year round can not be confirmed quantitatively the distribution and the like of the cockroaches in the day and night, necessary and sufficient application rate and spray The location and proper spraying time could not be specified. The present invention has been made under such a background, and an object of the present invention is to provide a cockroach detection device capable of constantly quantitatively detecting the presence of a cockroach .

[0007]

Cockroaches detection <br/> known apparatus according to the present invention SUMMARY OF THE INVENTION may, cockroaches walk contact detection means which changes in accordance with the electrostatic capacity of the electrostatic capacitance cockroach by near-contact , The amount of change in the capacitance of the detection means is
Specified when the specified value, which roughly matches the capacitance of the body, is exceeded
And a detection unit that outputs the detection signal of . Further, the detection means may be composed of a pair of comb-shaped or spiral-shaped conductors which are separated by a predetermined distance.

Further, the detection means has an AC bridge whose first connection point is connected to one end of the detection means, and a predetermined frequency at a second connection point adjacent to the first connection point of the AC bridge. An oscillating signal applying means for applying an oscillating signal, and a first input terminal connected to the first connecting point,
The third input terminal of the third terminal is located at a position facing the first connection point.
Connected to the first connection point and appearing at the first connection point
May be provided with differential amplification means for amplifying the differential component between the AC signal and the second AC signal appearing at the third connection point. Alternatively, the detection unit may include an oscillation unit that outputs an oscillation signal by using the detection unit as a component of a resonance circuit, and detect a cockroach based on a change in the oscillation frequency of the oscillation signal.

[0009]

According to the above construction, when the cockroach comes into contact with or comes close to the detection means composed of a pair of comb-shaped or spiral-shaped conductors which are separated by a predetermined distance, the capacitance of the detection means is increased.
Changes according to the capacitance of the cockroach, and the amount of change is
Exceeds the fixed value . The change in the capacitance of the detection means is the first
A differential component is generated in the AC signal that is transmitted to the AC bridge via the connection point and appears at the first connection point and the third connection point in the AC bridge. The differential component is amplified by the differential amplification means, and cockroaches are detected. Alternatively, the change in the capacitance of the detecting means changes the oscillation frequency of the oscillation signal of the oscillating means including the detecting means as a component of the resonance circuit. Based on the change of the transmission frequency
Cockroaches are detected.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment for detecting cockroaches by a change in a differential component of an AC signal and a second embodiment for detecting a cockroach by a change in an oscillation frequency of an oscillation circuit will be described below with reference to the drawings. Explain. First, a first embodiment of the present invention will be described.

FIG. 1 is a block diagram showing the configuration of a cockroach detecting device for detecting cockroaches such as cockroaches according to the first embodiment of the present invention. In FIG. 1, 1 is a comb-shaped conductor 1a, 1b. Is a printed circuit board on which one end of the conductor 1a is grounded. Further, as shown in the schematic partial view of FIG. 2, the conductor 1a and the conductor 1b are
The teeth 1c and the teeth 1d having a width of 1 mm are formed so as to be staggered with an interval of 1 mm.

Further, in FIG. 1, reference numeral 2 is an AC voltage generating circuit for generating an AC voltage having a frequency of, for example, 100 kHz and a voltage of, for example, 10 V, and 3 is a bridge circuit formed of capacitors, which are connected in series. The capacitors 3a and 3b having the electrostatic capacitance of, and the capacitor 3c and the variable capacitor 3d, which are also connected in series,
They are connected at the connection points 3e and 3f, which are the ends of each. The conductor 1b of the printed circuit board 1 is connected to the connecting point 3e.
Is also connected.

An AC voltage is applied from the AC voltage generating circuit 2 to a connection point 3g connecting the capacitors 3a and 3b, and a connection point 3h connecting the capacitor 3c and the variable capacitor 3d is grounded. There is. Reference numeral 4 denotes a differential AC amplifier circuit, which is a connection point 3e of the bridge circuit 3.
The differential component of the AC signal supplied from the AC signal and the AC signal supplied from the connection point 3f is amplified. The capacitance of the variable capacitor 3d is the same as that of the AC signal at the connection point 3e and the AC signal at the connection point 3f when there is no cockroach on the printed circuit board 1 (hereinafter referred to as normal time). To prevent the differential component from being output from the differential AC amplifier circuit 4,
That is, the bridge circuit 3 is adjusted so as to maintain a balanced state.

Reference numeral 5 is a detection circuit for detecting the differential signal supplied from the differential AC amplifier circuit 4 and outputting the detection signal. Reference numeral 6 is a variable resistor for setting a reference voltage of a voltage comparator circuit 7 described later. , the reference voltage is Gore on the printed circuit board 1
Set a little lower than the voltage of the detection signal when there are dust . Reference numeral 7 is a voltage comparator circuit that outputs an "H" level detection signal when the voltage of the detection signal supplied from the detection circuit 5 is higher than the reference voltage set by the variable resistor 6, and 8 is a voltage comparator circuit. A pulse generation circuit that detects the rising edge of the detection signal supplied from 7 and generates one pulse, 9 is a counter circuit that counts the pulses generated in the pulse generation circuit 8, and 10 is a numerical value that is counted by the counter circuit 9. Is a count display circuit for displaying, and 11 is an amplification circuit for amplifying the pulse generated in the pulse generation circuit 8 and outputting it as an external output signal to the outside.

In such a structure, the conductor 1a and the conductor 1b are electrically insulated from each other at the normal time,
The printed circuit board 1 does not operate as a capacitor. Therefore, the equilibrium state of the bridge circuit 3 is not broken, and the connection point 3
The differential component between the AC signal at e and the AC signal at the coupling point 3f is not output from the differential AC amplifier circuit 4. Therefore, since the detection signal is not output from the detection circuit 5, the detection signal is not output from the voltage comparator 7. Therefore, since no pulse is generated from the pulse generation circuit 8, the counter circuit 9 does not count,
The value displayed on the count display circuit 10 remains the value that was conventionally displayed. Further, there is no pulse output from the amplifier circuit 11.

[0016] When such a state, for example, Gokibu Li
There walks printed substrate 1, cockroaches feet conductors 1a
And the conductor 1b, the printed circuit board 1 operates as a capacitor having a predetermined electrostatic capacity. At this time, the magnitude of the electrostatic capacitance of the printed circuit board 1 changes depending on the electrostatic capacitance of the cockroaches walking on the printed circuit board 1 and the number of individuals. For example, the capacitance of the black cockroach is about 1 to 3 pF, and the capacitance of the German cockroach is 7 to 10 pF.
It is a degree.

When the capacitance of the printed circuit board 1 changes,
The equilibrium state of the bridge circuit 3 connected to the conductor 1b via the coupling point 3e is disrupted, and a differential occurs between the AC signal at the coupling point 3e and the AC signal at the coupling point 3f. As a result, the differential AC amplifier circuit 4 amplifies the differential component between the AC signal at the connection point 3e and the AC signal at the connection point 3f, and outputs a differential signal. A detection signal corresponding to is output.

Next, in the voltage comparator 7, the voltage of the detection signal output from the detection circuit 5 is compared with the reference voltage. In this case, since the voltage of the detection signal is higher than the reference voltage, the voltage The "H" level detection signal is output from the comparator 7. Next, the pulse generation circuit 8
At, when a rising edge of the detection signal output from the voltage comparator 7 from the "L" level to the "H" level is detected, one pulse is generated.

This pulse is counted by the counter circuit 9 and displayed on the count display circuit 10 so that it can be read by an observer. Further, the pulse generated in the pulse generation circuit 8 is amplified in the amplification circuit 11 and then output to the outside as an external output signal, and in an external device (not shown), the distribution of cockroaches is calculated, and necessary and sufficient medicines are supplied. The appropriate amount of spray is determined. As described above, according to the first embodiment of the present invention, it is possible to detect cockroaches walking on the printed board 1.

[0020] Next, Gore from the change in the oscillation frequency of the oscillation circuit
A second embodiment of the present invention for detecting a cockroach will be described with reference to the drawings. FIG. 3 is a block diagram showing the configuration of the cockroach detection device according to the second embodiment of the present invention. In this figure, parts corresponding to those in FIG. 1 are assigned the same reference numerals and explanations thereof are omitted. .

In FIG. 3, reference numeral 12 is a connecting point for connecting the conductor 1b of the printed circuit board 1 and the connecting point 13a of the oscillation circuit 13 described later. Reference numeral 13 denotes an oscillation circuit that outputs an oscillation signal of a predetermined frequency. The capacitor c1 has a capacitance of 10 pF, the resistance r1 has a resistance value of 10 kΩ, and the resistance value 51 k.
It is composed of a resistance r2 of Ω and inverters n1 to n3 to which a DC voltage of 6V is applied. However, characteristic values and operating conditions of each circuit element described above, it is detected Goki
Set according to the electrical characteristics of yellowtail .

The capacitor c1 has one end grounded and the other end connected to the resistors r1 and r2 at the coupling point 13a. The resistor r1 is connected to the inverter n1, and the electric signal supplied to the inverter n1 is supplied to the resistor r2 and the inverter n2 via the connection point 13b. The inverter n2 is connected to the inverter n3, and
3 is connected to the output terminal 14. Reference numeral 15 is a frequency meter, which detects the frequency of the oscillation signal supplied from the output terminal 14 and indicates it to the observing person, and outputs the detected frequency data to the outside as an external output signal.

In such a structure, in a normal state, the conductor 1a and the conductor 1b are electrically insulated, and the printed circuit board 1 does not function as a capacitor. Therefore,
In the oscillation circuit 13, the only capacitor that can store electric charge is the capacitor c1 having a capacitance of 10 pF. An electric signal is supplied from the inverter n1 to the capacitor c1, and a process of accumulating electric charges in the capacitor c1 in accordance with the supplied electric signal (hereinafter, referred to as an accumulating process) and accumulated electric charges. The process of discharging the electric charge (hereinafter referred to as the discharging process) is alternately performed in a predetermined cycle.

As a result, the oscillation signal of a predetermined frequency is
Output from the converter n1, the converters n2 and n
Amplified at 3, and transmitted to the output terminal 14. The oscillation signal transmitted to the output terminal 14 is supplied to the frequency meter 15. The frequency meter 15 detects the frequency of the supplied oscillating signal and indicates it to the monitoring person, and outputs the detected frequency data to the outside as an external output signal.

In such a state, if, for example, German cockroaches (capacitance 7 to 10 pF) walk on the printed circuit board 1 and the legs of the cockroaches contact the conductors 1a and 1b, the printed circuit board 1 is electrostatically charged. It operates as a capacitor having a capacity of 7 to 10 pF. That is, in the oscillation circuit of FIG. 3, the electrostatic capacity capable of accumulating charges has increased.

An electric signal is supplied from the inverter n1 to the capacitor c1 and the conductor 1b, and the capacitor c1 alternately performs a storage process and a discharge process at a predetermined cycle. The length of this cycle becomes longer than that in the normal state because the capacitance of the oscillation circuit as a whole is increased. That is, the oscillation frequency of the oscillation signal output from the output terminal 4 becomes low.

Next, the oscillation signal is output from the output terminal 4 to the frequency meter 1
When it is supplied to 5, the oscillation frequency is detected by the frequency meter 15 and shown to the observer. In this case, the frequency shown to the observer will be lower than the normal frequency, and the observer will
You can see the presence of cockroaches . Further, the frequency data detected by the frequency meter 15 is output to the outside as an external output signal, and an external device (not shown) calculates the distribution of cockroaches and determines the necessary and sufficient spraying amount of the drug. .

By the way, the conductors 1a, 1 of the printed circuit board 1
There are several types of b patterns, and for each pattern,
Experimental data showing that the pattern is effective is shown in FIG.
Sampled in the circuit with the configuration shown in. In this experiment, the board on which the conductors of the patterns shown in FIGS. 2 and 4 to 6 were formed was connected to the connecting point 12 of FIG. 3 and installed at a predetermined position. When the dog walked, the same was done by measuring the frequency of the oscillation signal output from the output terminal 14 when the German cockroach walked.

Below is a table summarizing the experimental data obtained in this experiment. However, the unit in the table is kHz. In the table above, when the black cockroach was measured using the pattern of FIG. 4, a numerical value of 265 kHz was obtained. This numerical value is an average value of the data of 250 to 270 kHz obtained in the experiment. The measurement value of the black cockroach using the pattern of FIG. 5 is also the same.
It is an average value of 360 kHz.

In the measurement using the pattern shown in FIG. 2, when four German cockroaches walked on the printed circuit board 1, the frequency was 300 kHz. From the above table, if the printed circuit board 1 on which the conductors of the patterns shown in FIGS. 2 and 4 to 6 are formed is used, the frequency of the electric signal output from the oscillation circuit is a specific value depending on the number and type of cockroaches. It turns out that it fluctuates.

As described above, according to the second embodiment of the present invention, a cockroach walking on the printed board 1 can be detected and the kind of the cockroach can be specified. In addition, in the above-mentioned first and second embodiments, an example in which the substrate with which the cockroach contacts is a printed circuit board has been shown, but using a flexible substrate or the like having a degree of freedom in arrangement, the cockroaches to be detected are It may be arranged so that it can be easily walked. In addition, an insulating sheet may be attached on the printed board 1 so that non-contact detection can be performed.

Further, by monitoring the external output signal output from the amplifier circuit 11 or the frequency meter 15 of the plurality of cockroach detecting devices for a predetermined period, the cockroaches within the predetermined period are detected.
It may be possible to detect the distribution of the temperature. Alternatively, an external output signal output from the amplifier circuit 11 or the frequency meter 15 may be transmitted to a remote place to check the distribution of the cockroaches at the remote place. The application amount of the medicine may be applied by remote control.

[0033]

As described in the foregoing, according to the cockroaches <br/> detection apparatus of the present invention, contacting the cockroaches detection means or, in close proximity, the electrostatic capacitance of cockroaches detecting means Den'yo
There is an effect that the detection means can detect the presence of a cockroach by changing in accordance with the amount, and the amount of change exceeding a predetermined value . In addition, the detection means is a comb type or a spiral type.
As a result, you can detect cockroaches more reliably with a simple configuration.
The effect is that you can. Further, from the above-described effects, by always arranging the cockroach detecting device at a plurality of locations, it is possible to specify the distribution of the cockroaches at a predetermined time . Et al is, from this fact, necessary and sufficient application rate of the drug and spraying location and proper spray when and can be determined.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a cockroach detection device according to a first embodiment of the present invention.

FIG. 2 is a schematic partial view showing a first pattern of a substrate used in an experiment of the present invention.

FIG. 3 is a block diagram showing the configuration of a cockroach detection device according to a second embodiment of the present invention.

FIG. 4 is a schematic partial view showing a second pattern of the substrate used in the experiment of the present invention.

FIG. 5 is a schematic partial view showing a third pattern of the substrate used in the experiment of the present invention.

FIG. 6 is a schematic partial view showing a fourth pattern of the substrate used in the experiment of the present invention.

[Explanation of symbols]

 1 Printed Circuit Board (Detecting Means) 2 Bridge Circuit (Detecting Means) 4 Differential AC Amplifier Circuit (Detecting Means) 13 Oscillating Circuit (Detecting Means)

Claims (5)

[Claims] 1. A walk contacting cockroaches are detection means which changes according to the capacitance of the capacitance cockroach by near-contact, capacitance variations of the sensing means Gokibu
When the specified value is exceeded, which is approximately the same as the integrated capacitance
A cockroach detection device comprising: a detection unit that outputs a predetermined detection signal . 2. The detecting means is provided at a predetermined distance from each other.
The cockroach detecting device according to claim 1, wherein the cockroach detecting device comprises a pair of comb-shaped conductors. 3. The detecting means is provided at a predetermined distance from each other.
The cockroach detection device according to claim 1, wherein the cockroach detection device comprises a pair of spiral conductors. 4. The detection means has an AC bridge whose first connection point is connected to one end of the detection means, and a predetermined frequency at a second connection point adjacent to the first connection point of the AC bridge. Oscillation signal applying means for applying the oscillation signal of
Has an input end connected to the first connection point, a second input end connected to a third connection point at a position facing the first connection point, and appears at the first connection point. 4. The differential amplification means for amplifying the differential component between the first AC signal and the second AC signal appearing at the third connection point, as claimed in claim 1. Mentioned cockroach inspection
Knowledge device. 5. The detecting means includes an oscillating means for outputting an oscillating signal by using the detecting means as a constituent element of a resonance circuit, and detects a cockroach based on a change in the oscillating frequency of the oscillating signal. The cockroach detection device according to any one of claims 1 to 3, wherein