JP2001289624A - Reel for angling - Google Patents

Abstract

PROBLEM TO BE SOLVED: To measure an ultrasonic-wave propagation time with high precision even when the distance between the surface of a fishing line wound around a spool and an ultrasonic sensor is short by using one ultrasonic sensor alone. SOLUTION: The reel for angle which is equipped with the ultrasonic sensor has a spool for winding a fishing line supported rotatably between flanks which are arranged opposite to each other and a reflecting plate is provided. The substantial distance is made long by propagating a transmitted wave and a reflected wave through the reflecting plate, and the thickness of the fishing line wound around the spool is measured.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fishing reel for measuring a feeding amount and a winding amount of a fishing line with high accuracy.

[0002]

2. Description of the Related Art By measuring the length of fishing line fed and wound from a spool, a fishing reel capable of measuring the depth of water at which a mechanism is thrown or the distance to an arrival point when the fish is thrown farther is known. Is being developed.

In order to measure the length of fishing line fed and wound from the spool of such a fishing reel with high accuracy, it is necessary to determine how many lines are fed and wound per rotation of the spool. Need to measure. However, since the fishing line payout amount and the winding amount per rotation of the spool vary depending on the thickness of the fishing line, the number of windings of the spool, and the like, an error is included in the measured value.

In order to eliminate these errors, as a means for accurately measuring a fishing line conventionally wound on a spool,
Optical systems such as semiconductor lasers and light-emitting diodes have been used (Japanese Patent Application Laid-Open No. 1-307612). Recently, measurement methods using ultrasonic sensors have been prosperous, and there are mainly two types of measurement methods.

In the transmission / reception shared measurement method in which transmission and reception are performed by one ultrasonic sensor, ultrasonic waves are transmitted from the ultrasonic sensor toward the fishing line wound on the spool, and the ultrasonic waves reflected on the fishing line surface are reflected. By receiving the signal again with the ultrasonic sensor, the ultrasonic propagation time from transmission to reception can be measured (Japanese Patent Application Laid-Open No. 3-223614).

On the other hand, in a measurement method in which transmission and reception are separately performed for transmission and reception using two ultrasonic sensors, an ultrasonic wave is transmitted from a transmission ultrasonic sensor to a fishing line wound on a spool, The ultrasonic wave reflected from the surface of the fishing line is received by the receiving ultrasonic sensor, so that the ultrasonic propagation time from transmission to reception can be measured (Japanese Patent Application Laid-Open No. Hei 8-25).
No. 4419).

The signal from the sensor for detecting the rotation of the spool is subjected to arithmetic processing with the previously determined ultrasonic wave propagation time, so that the amount of fishing line fed and wound with the rotation of the spool is calculated. .

In addition, since the sound speed of the ultrasonic wave changes depending on the temperature and an error occurs in the ultrasonic wave propagation time, a temperature sensor or the like for correcting the sound speed of the ultrasonic wave is added when performing more accurate measurement. I have.

[0009]

However, in a transmission / reception measuring device that performs transmission and reception with one ultrasonic sensor, when the distance between the surface of the fishing line wound on the spool and the ultrasonic sensor is short, Measuring that distance is very difficult.

The main reason is that when a transmission voltage, which is a pulse signal, is applied to an ultrasonic sensor to generate an ultrasonic wave, reverberation remains in the ultrasonic sensor for a certain period of time until the vibration is attenuated and disappears. When measuring the short distance, while the reverberation is present, the reflected wave from the fishing line surface wound on the spool returns to the ultrasonic sensor, and the reflected wave and the reverberation overlap, and from the transmission to the reception, This is due to the problem that it is impossible to accurately measure the ultrasonic propagation time.

[0011] Therefore, it is necessary to mount the ultrasonic sensor at a certain distance from the spool, and there is a limit to downsizing of the fishing reel in order to secure an ultrasonic wave propagation space.

[0012] In addition, a measuring device that performs transmission and reception by using two ultrasonic sensors requires two ultrasonic sensors, which causes problems such as miniaturization, weight reduction, and high cost of the sensor unit. .

Further, since the surface of the fishing line wound on the spool is cylindrical, the ultrasonic beam emitted from the ultrasonic sensor is diffused when reflected on the surface of the fishing line, which is the target, and the incident direction is changed. The reflected energy to the light decreases. For this reason, there is a problem that the level of the reflected wave reaching the ultrasonic sensor is reduced, detection becomes impossible, and measurement accuracy is reduced.

Further, since the sound speed of the ultrasonic wave changes depending on the temperature and gives an error to the ultrasonic wave propagation, a temperature sensor or the like for correcting the sound speed of the ultrasonic wave is conventionally added when performing more accurate measurement. However, the addition of a new temperature sensor has a negative effect on the size and weight of the sensor section, and has the problem of further increasing costs.

Further, if dirt or water droplets adhere to the radiation surfaces (the transmitting surface and the receiving surface) of the ultrasonic sensor, water droplets radiated from the ultrasonic sensor and ultrasonic energy incident on the ultrasonic sensor adhere to the water droplets. Absorbed or reflected, the level of the reflected echo from the received target decreases. In this case, the ultrasonic measurement cannot be performed, and the unwinding amount and the winding amount of the fishing line cannot be measured.

The present invention has been made in view of the above-described problems, and has been developed to provide a method for measuring the ultrasonic propagation time with high accuracy even when the distance between the surface of the fishing line wound on the spool and the ultrasonic sensor is short. An object of the present invention is to provide a fishing reel that can be performed by using one ultrasonic sensor.

Further, the transmission wave is converged to irradiate the fishing line wound on the spool, and the reflected wave from the fishing line surface can be efficiently caught by the ultrasonic sensor, so that the measurement accuracy can be improved. An object of the present invention is to provide a fishing reel device.

It is another object of the present invention to provide a fishing reel device which can perform sound speed correction by simple means without using a temperature sensor for correcting the sound speed of ultrasonic waves.

Further, there is provided a fishing reel device capable of giving a warning so as to perform an accurate ultrasonic measurement when a reflection echo level of an ultrasonic sensor is lowered due to adhesion of dirt, water droplets, or the like. The purpose is to:

[0020]

According to a first aspect of the present invention, there is provided a fishing reel for rotatably supporting a spool for winding a fishing line between oppositely disposed side surfaces, and a thickness of the fishing line wound on the spool. In a fishing reel provided with an ultrasonic sensor for measuring the wave length, a reflection plate is provided, and a transmission wave and a reflection wave are propagated through the reflection plate.

According to the structure of the first aspect, the transmission of the transmission wave from the ultrasonic sensor to the target fishing line surface and the transmission of the reflected wave from the fishing line surface to the ultrasonic sensor do not directly propagate, but are reflected. Propagated through the plate. Therefore, it is not necessary to take the ultrasonic wave propagation space linearly, and the propagation distance to the outside of the reverberation time range can be sufficiently obtained even in a limited space, and the degree of freedom in mounting the vibrator increases.

Also, since the ultrasonic wave propagation distance outside the reverberation time range can be sufficiently ensured by the reflector, the transducer can be transmitted and received by one transducer without separately preparing for transmission and reception. Even when the distance between the fishing line surface wound on the spool and the ultrasonic sensor is short,
The use of the reflector enables accurate measurement of the ultrasonic wave propagation distance, which leads to a reduction in size and cost of the entire fishing reel.

According to a second aspect of the present invention, there is provided an ultrasonic sensor for rotatably supporting a spool for winding a fishing line between opposed side surfaces, and measuring a thickness of the fishing line wound on the spool. In the fishing reel provided with, the ultrasonic sensor for transmission and reception is disposed as one of the ultrasonic sensors on one side of the side surface, and a reflection plate is disposed on a support portion bridged between the side plates. And

According to the structure of claim 2, it is not necessary to take the ultrasonic wave propagation space linearly as in the case of claim 1, and the propagation distance to outside the reverberation time range can be sufficiently obtained even in a limited space. The degree of freedom in mounting the vibrator can be increased.

Further, since the ultrasonic wave propagation distance outside the reverberation time range can be sufficiently secured by the reflector, even when the distance between the fishing line surface wound on the spool and the ultrasonic sensor is short, Since the ultrasonic propagation distance can be accurately measured by one ultrasonic sensor that is commonly used for transmission and reception, the size and weight of the entire fishing reel can be reduced.

According to a third aspect of the present invention, there is provided a fishing reel according to the first or second aspect, wherein the reflecting plate has a concave curved surface.

According to the third aspect of the present invention, the ultrasonic beam emitted from the ultrasonic sensor is made to have a constant phase at the time of reflection by the curved reflecting plate. Diffusion and attenuation are suppressed. Therefore, the echo level increases, so that the reflected wave from the surface of the fishing line wound on the spool can be reliably captured by the ultrasonic sensor, and the measurement accuracy is improved.

According to a fourth aspect of the present invention, there is provided a fishing reel according to the first or second aspect, wherein the transmitting / receiving ultrasonic sensor has a concave curved surface.

According to the fourth aspect of the present invention, the ultrasonic beam transmitted from the concave-curved ultrasonic sensor is converged and applied to the fishing line surface, and the reflected wave from the fishing line surface is also reflected in the incident direction. Therefore, the reflected wave from the surface of the fishing line wound on the spool can be reliably captured by the curved ultrasonic sensor, and the measurement accuracy is improved.

According to a fifth aspect of the present invention, there is provided a fishing reel according to the first or second aspect, wherein a calibration target is provided at a predetermined position irradiated with an ultrasonic transmission wave to correct the sound speed of the ultrasonic wave. It is made possible.

According to the fifth aspect of the present invention, the reflected wave from the calibration target provided at the predetermined position irradiated with the ultrasonic transmission wave is received by the ultrasonic sensor, so that the reflected wave from the known distance is obtained. Since the propagation time can be measured, the sound speed can be corrected without newly adding a temperature sensor for correcting the sound speed of the ultrasonic wave.

A fishing reel according to a sixth aspect of the present invention is the fishing reel according to the fifth aspect, wherein the calibration target is provided on a reflector.

According to the configuration of claim 6, since the ultrasonic wave sensor receives the reflected wave from the calibration target added on the reflector, the propagation time from a known distance can be measured. The sound speed can be corrected without newly adding a temperature sensor for correcting the sound speed of the sound wave. Further, since the calibration target can be formed together with the reflection plate, the configuration becomes simpler.

The fishing reel according to claim 7 is the same as that in claims 1 to 6.
In the fishing reel described above, a warning unit that warns of adhesion of dirt, water droplets, and the like is provided based on a reception level to the ultrasonic sensor.

According to the seventh aspect of the present invention, when the reception waveform obtained by the ultrasonic sensor is monitored and a decrease in the echo level occurs, it is determined that the ultrasonic sensor and the reflection plate have a deposit. The warning is activated by operating a warning means such as a display provided on the fishing reel. Therefore, by washing the ultrasonic sensor and the reflecting plate in accordance with the warning, normal measurement can be performed again.

[0036]

Embodiments of the present invention will be described below in detail with reference to the drawings.

1 to 7 show an embodiment of a fishing reel according to the present invention. FIG. 1 shows an overall structural view, FIG. 2 shows a schematic perspective view of a main part, and FIG. FIG. 4 is a diagram for explaining the principle, FIG. 4 is a diagram for explaining the operation of a concave curved reflecting plate, FIG. 5 is a diagram for explaining the operation of a reflecting plate having a parabolic reflection surface, and FIG.
FIG. 7 is a block diagram of a processing unit, and FIG. 7 is a signal timing chart.

In FIGS. 1 and 2, a fishing reel body 1 is shown.
Has side plates 1a and 1b opposed to each other, and a spool 2 is rotatably disposed between the side plates 1a and 1b. A fishing line 8 is wound around the spool 2.

The spool 2 has a built-in rotation sensor 6b, and the side plate 1b is provided with a rotation detection sensor 6a opposed thereto. An ultrasonic sensor 3 is disposed on the side plate 1b, and a display unit 5 and a processing unit for calculating the amount of thread to be fed and wound and a battery (shown in the figure) are provided in the upper panel 1c of the reel body 1. No) is waterproof and built-in.

A concave curved reflecting plate 4 is disposed on a support between the side plates 1a and 1b or on the reel body 1, and a calibration target 7 is formed on the concave curved reflecting plate 4.
Reference numeral 9 denotes a rotating handle.

Now, referring also to FIG.
Is formed by a flat plate made of metal or hard resin, and is formed in an ultrasonic wave propagation path so that the ultrasonic energy transmitted from the ultrasonic sensor 3 is converged and reflected as much as possible on the spool 2 around which the fishing line 8 is wound. About 45 for the incident angle of sound wave
It is fixedly arranged at a known distance d from the center axis 2a of the spool 2 at an angle of degrees.

In FIG. 4, the ultrasonic beam transmitted from the ultrasonic sensor 3 propagates in the air at a directional angle of several degrees, and is converged and reflected by the concave curved reflecting plate 4 so as to be transmitted to the spool 2. The surface of the wound fishing line 8 is irradiated. 4 (a) is a state viewed obliquely, FIG. 4 (b) is a state viewed from the axial direction of the spool 2, and FIG. 4 (c).
Indicates the state viewed from the side and the top, respectively.

The shape of the ultrasonic beam at the time of irradiation is an elliptical shape in which the X direction in FIG. Therefore, when the ultrasonic beam is reflected on the surface of the fishing line 8 wound on the cylindrical spool 2, the reflected ultrasonic beam is less likely to be diffused and attenuated.

This is because the shape of the ultrasonic beam when irradiating the surface of the fishing line 8 wound on the spool 2 is not converged and reflected when a normal flat reflecting plate is used, as shown in FIG. It becomes an elliptical shape in which the X direction is not narrowed,
It can be seen that it is significantly improved as compared with the case where diffusion occurs at the time of reflection on the fishing line 8 surface and the echo level is attenuated.

The concave shape of the concave curved reflector 4 is shown in FIG.
As shown in (b), a paraboloid of revolution (parabolic reflection surface)
Can be formed as a parabolic reflector 4 'having a partially cut-out shape. As shown in FIG. 3B, when the ultrasonic sensor 3 is assumed to be a point sound source, the ultrasonic wave emitted from the point sound source is reflected by the reflecting surface of the parabolic reflector 4 '. While propagating on a parallel sound wave surface, the sound waves incident in parallel are reflected on the reflection surface and converge at one point. Therefore, the ultrasonic wave applied to the reflecting plate 4 ′ has a constant phase at the parabola opening surface when reflected, and propagates as a plane wave when applied to the surface of the fishing line 8 wound on the spool 2. For this reason, the reflected wave from the fishing line surface is also efficiently caught by the parabolic reflector 4 ′, is converged and reflected by the ultrasonic sensor 3, and the measurement accuracy can be improved.

The curvature of the parabolic reflector 4 'in the Z-axis direction may be changed in accordance with the cylindrical shape of the spool as the target. The ultrasonic beam reflected by the reflecting plate 4 ′ whose curvature in the Z-axis direction is changed in accordance with the cylindrical shape of the spool converges in the Z-axis direction (perpendicular to the axial direction of the spool). Since the (ellipse) is performed, the effect of suppressing a decrease in the echo level can be obtained even if the target spool is cylindrical.

The calibration target 7 is formed of a flat plate made of metal or hard resin, and is provided on the concave curved reflector 4 and the parabolic reflector 4 '. The arrangement of the calibration target 7 is performed so that a part of the ultrasonic energy transmitted from the ultrasonic sensor 3 is reflected to the ultrasonic sensor, and multiple reflection occurs between the ultrasonic sensor 3 and the calibration target 7. It is desirable to incline the ultrasonic wave propagation path from a right angle by several degrees so as not to occur. The calibration target 7 does not necessarily need to be provided on the concave curved reflecting plate 4 or the like, but may be provided at any position where the ultrasonic beam can be reflected by the ultrasonic sensor 3, and may be provided on, for example, a reel body or a support portion.

Referring to FIG. 3, the operation of the fishing reel according to the present embodiment will be described. The ultrasonic sensor 3 is excited by the drive signal amplified by the processing unit 11, and the ultrasonic wave is transmitted from the concave curved reflector 4 and the ultrasonic sensor 3 to the calibration target 7 mounted at a known fixed distance c. You. On the other hand, when the ultrasonic sensor 3 receives the ultrasonic waves reflected on the surface of the calibration target 7 and the fishing line 8, the processing unit 11
In accordance with the rotation state and rotation direction of the spool 2 obtained from the rotation detection sensors 6a and 6b,
The signal processing is performed to calculate the feeding amount and the winding amount of the fishing line 8,
It is displayed on the display 5.

Next, the signal processing and the processing of the feeding amount and the winding amount of the fishing line performed by the processing unit 11 will be described with reference to FIGS.

In FIG. 6 showing a block diagram of the processing section 11, a central processing circuit (hereinafter, CPU) 19 operates based on a reference oscillation signal (40 MHz) of an oscillator 20. The CPU 19 operates at 40 MHz which is the reference oscillation signal.
Is output to the drive signal generation circuit 18 as a transmission trigger using a reference signal obtained by dividing the frequency by 1/2 and a control signal having a certain predetermined repetition period T0. The drive signal generation circuit 18 has a built-in counter and divides the reference signal for a certain time Tw when receiving the transmission trigger, and in the present embodiment, divides the frequency by 80%.
Generate a 0 KHz signal. This frequency becomes the carrier frequency radiated from the ultrasonic sensor.

As a result, the driving signal generating circuit 18 has a carrier frequency of 800 KHz and a transmission pulse width T shown in FIG.
w, a drive signal 31 having a transmission repetition period T0 is generated. The drive signal 31 is amplified by the power amplifying circuit 17 constituting a transmission circuit together with the drive signal generation circuit 18, and drives the ultrasonic sensor 3 via the transmission / reception switch 12. The ultrasonic sensor 3 is excited by the amplified drive signal 31, and emits ultrasonic waves toward the concave curved reflecting plate 4.

On the other hand, the ultrasonic waves reflected on the surfaces of the calibration target 7 and the fishing line 8 are incident on the ultrasonic sensor 3 and converted into reception signals. The reception signal from the ultrasonic sensor 3 is transmitted to the bandpass filter 1 via the transmission / reception switch 12.
3, and sent to the amplifier circuit 14. The reception waveform 32 amplified by the amplification circuit 14 includes a leak signal of a transmission wave and a reverberation signal R0 in addition to the reflection signals R1 and R2 from the surface of the calibration target 7 and the fishing line 8.

Time T until this reflected signal R1 is obtained
Reference numeral 1 denotes a time obtained by providing the reflection plate 4. If the time T1 does not exist, the reflection signal R2 from the surface of the fishing line 8 overlaps or is close to the leak signal of the transmission wave and the reverberation signal R0. And it is difficult to determine. However, since the propagation of the ultrasonic wave between the ultrasonic sensor 4 and the surface of the fishing line 8 is performed via the reflection plate 4, the propagation distance, that is, the propagation time is increased, and the reflection signal R2 can be determined.

Now, the reflected signals R1 and R2 are detected by the detection circuit 15.
, Full-wave rectified and converted into a DC detection signal 34, and the level comparison circuit 16 compares the DC detection signal 34 with a reference voltage Vref 33, and converts the reception gate signal 35 into a CPU signal.
19 is output.

In the CPU 19, the times T1 and T2 from the rise of the waveform of the drive signal 31 to the rise of the reception gate signal 35 are calculated based on the reference signal of 20 MHz. Here, T1 is the time required for the ultrasonic wave to reciprocate between the ultrasonic sensor 3 and the calibration target 7 (distance c × 2) in FIG. T2 is the time required for the ultrasonic wave to reciprocate (distance (a + b) × 2) between the ultrasonic sensor 3 and the surface of the fishing line 8 through the concave curved reflecting plate 4 in FIG.

The calculation of the amount of feeding and winding from the spool 2 performed by the processing unit 11 is performed by the following method.

First, the distance a + b between the ultrasonic sensor 3 and the surface of the fishing line 8 wound on the spool 2 indicates that the ultrasonic wave reciprocates between the ultrasonic sensor 3 and the calibration target 7 (distance c × 2). And the time T2 required for the ultrasonic wave to reciprocate (distance (a + b) × 2) between the ultrasonic sensor 3 and the surface of the fishing line 8 via the concave curved reflecting plate 4. Based on the time, the sound velocity corrected value L is calculated as follows based on the propagation time T1 of the calibration target 7 at a known distance from the ultrasonic sensor 3.

The value L of which the sound velocity has been corrected is L = c × (T2-Tofs) / (T1-Tofs). (However, Tofs: response delay of the ultrasonic sensor and the receiving circuit) Here, the radius r of the spool 2 is r = (a + d)-(L), and the amount S of feeding and winding from the spool 2 is N
Is the rotation speed of the spool detected by the rotation sensor 6a.

[0059]

(Equation 1)

Is as follows.

The value calculated as described above is output from the processing section 11 and displayed on the display 5 as the amount S of feeding or winding the fishing line 8 from the spool 2.

FIG. 8 is a view showing an ultrasonic sensor and a reflector of a fishing reel according to another embodiment of the present invention.
In this embodiment, the reflecting plate is a flat reflecting plate 41, while the ultrasonic wave emitting surface (incident surface) of the ultrasonic sensor is a curved ultrasonic sensor 31. Other configurations, signal processing, and the like are the same as those in the embodiment described with reference to FIGS.

The curved surface of the ultrasonic sensor 31 is shown in FIG.
As shown in (2), when the distance between the planar reflector 41 and the central axis of the spool 2 is r1, and the distance between the ultrasonic sensor 31 and the planar reflector 41 is r2, the radius R = (r1
+ R2) has a shape obtained by cutting a part of the circumference. This state is equivalently shown in FIG.

Since the incident ultrasonic wave is reflected as it is on the planar reflecting plate 41, the curved ultrasonic sensor 3
The ultrasonic beam emitted from 1 is converged and applied to the surface of the fishing line 8 of the spool 2, and the reflected wave from the surface of the fishing line is also reflected in the incident direction. Therefore, the reflected wave from the surface of the fishing line 8 wound on the spool 2 can be reliably captured by the curved ultrasonic sensor 31, and the measurement accuracy is improved.

The ultrasonic sensor 31 having a curved surface can be formed, for example, by using PVDF (polyvinylidene fluoride) of a polymer piezoelectric film which can easily produce an ultrasonic sensor having a curved surface. Alternatively, piezoelectric rubber, curved ceramic, or the like may be used for the curved ultrasonic sensor. At this time, since the planar reflector 41 may be made of any material that is significantly different from the acoustic impedance of air, plastic or the like can be used sufficiently.

In the above embodiment, the calibration target 7 is fixed above the concave curved reflector 4 and the planar reflector 41, but the mounting position is not limited to this location. May be attached at a known distance from, for example, between the concave curved reflecting plate 4 and the spool 2. Further, the concave curved reflecting plate 4 and the planar reflecting plate 41 are arranged at an angle of 45 degrees in the ultrasonic wave propagation path, but may be fixed at another angle in consideration of the reflecting plate.

Further, the mounting position of the ultrasonic sensor is the side plate 1b. However, the mounting position is not limited to this position, and the ultrasonic sensor may be mounted on the upper panel 1c of the fishing reel body.

The power source is a battery built in the fishing reel body, but a built-in battery or an external battery may be used.

Further, as shown in FIG. 1, a warning lamp 5 a for urging the cleaning of the surface of the ultrasonic sensor 3 or the reflector 4 is arranged on the display 5. The reflected echo (R1 in FIG. 7) at the calibration target 7 set at a fixed distance from the ultrasonic sensor 3 is A / D-converted at a high speed, taken into the CPU 19, and the average value is compared with a predetermined fixed level. .
If the reflected echo is greater than a predetermined level, it is determined that the reflected echo is in a normal state, and if it is lower than the predetermined level, it is determined that an error has occurred.

If it is determined that an error has occurred, it is determined that dirt or water droplets have adhered to the surface of the ultrasonic sensor 3 or the surface of the reflection plate 7, and a warning lamp 5a is provided to wash these.
Lights up. The user of the fishing reel receives the lighting of the warning lamp 5a, cleans the surface of the ultrasonic sensor 3 and the surface of the reflection plate 7, and returns to the normal state.

In the above embodiment, the echo to be monitored and measured is from the calibration target 7. However, the present invention is not limited to this, and the reflected echo from an object at a certain distance from the ultrasonic sensor 3 is used. Alternatively, a reflected echo from the surface of the fishing line wound on the spool 2 may be used. Also, as a method of determining the reflected echo,
Without performing A / D conversion, the reflected echo waveform may be easily compared with a predetermined level, and a case where the waveform is lower than the predetermined level may be determined as an error. Further, instead of turning on the warning lamp 5a as a warning method, a warning method using sound such as a buzzer may be employed, or a warning using both display and sound may be used.

[0072]

According to the fishing reel of the first aspect, the transmission of the transmission wave from the ultrasonic sensor to the target fishing line surface and the transmission of the reflected wave from the fishing line surface to the ultrasonic sensor directly propagate. Instead of propagating through the reflector. Therefore, it is not necessary to take the ultrasonic wave propagation space linearly, and the propagation distance to the outside of the reverberation time range can be sufficiently obtained even in a limited space, and the degree of freedom in mounting the vibrator increases.

Further, since the ultrasonic wave propagation distance outside the reverberation time range can be sufficiently ensured by the reflector, the transducer can be transmitted and received by one transducer without separately preparing the transducer for transmission and reception. Even when the distance between the fishing line surface wound on the spool and the ultrasonic sensor is short,
The use of the reflector enables accurate measurement of the ultrasonic wave propagation distance, which leads to a reduction in the size of the fishing reel as a whole.

According to the fishing reel of the second aspect, as in the first aspect, it is not necessary to take an ultrasonic wave propagation space linearly, and even in a space where the propagation distance to outside the reverberation time range is limited. It can be taken sufficiently, and the degree of freedom in mounting the vibrator can be increased.

Further, since the ultrasonic wave propagation distance outside the reverberation time range can be sufficiently secured by the reflector, even when the distance between the fishing line surface wound on the spool and the ultrasonic sensor is short, Since the ultrasonic wave propagation distance can be accurately measured with one ultrasonic sensor that is commonly used for transmission and reception, the size, weight, and cost of the entire fishing reel can be reduced.

According to the fishing reel of the third aspect, the ultrasonic beam emitted from the ultrasonic sensor is made to have a constant phase at the time of reflection by the curved reflecting plate.
Spreading and attenuation of the ultrasonic beam during ultrasonic wave propagation are suppressed. Therefore, the echo level increases, so that the reflected wave from the surface of the fishing line wound on the spool can be reliably captured by the ultrasonic sensor, and the measurement accuracy is improved.

According to the fishing reel of the present invention, the ultrasonic beam transmitted from the ultrasonic sensor having a curved surface is converged and irradiated on the fishing line surface, and the reflected wave from the fishing line surface is also incident. Therefore, the reflected wave from the surface of the fishing line wound on the spool can be reliably captured by the curved ultrasonic sensor, and the measurement accuracy is improved.

According to the fishing reel of the fifth aspect, the reflected wave from the calibration target provided at the predetermined position irradiated with the ultrasonic transmission wave is received by the ultrasonic sensor, so that the known wave is received. Since the propagation time from the distance can be measured, the sound speed can be corrected without newly adding a temperature sensor for correcting the sound speed of the ultrasonic wave.

According to the fishing reel of the sixth aspect, the propagation time from a known distance can be measured by receiving the reflected wave from the calibration target added on the reflection plate by the ultrasonic sensor. Therefore, the sound speed can be corrected without newly adding a temperature sensor for correcting the sound speed of the ultrasonic wave. Further, since the calibration target can be formed together with the reflection plate, the configuration becomes simpler.

According to the fishing reel of the present invention, when the reception level obtained by the ultrasonic sensor is monitored and the echo level is lowered, a warning is given to the cleaning of the ultrasonic sensor and the surface of the reflector. Accordingly, a warning can be issued before the detection errors of the thread winding amount and the feeding amount occur, so that the measurement error can be reduced and the measurement accuracy is improved.

[Brief description of the drawings]

FIG. 1 is an overall structural view of an embodiment of a fishing reel of the present invention.

FIG. 2 is a schematic perspective view of a main part of one embodiment of a fishing reel of the present invention.

FIG. 3 is a view for explaining the measurement principle of one embodiment of the fishing reel of the present invention.

FIG. 4 is a view for explaining the operation of the concave curved reflecting plate of one embodiment of the fishing reel of the present invention.

FIG. 5 is a diagram illustrating the operation of a parabolic reflector of one embodiment of the fishing reel of the present invention.

FIG. 6 is a block configuration diagram of a processing unit of one embodiment of a fishing reel of the present invention.

FIG. 7 is a timing chart of signals of one embodiment of the fishing reel of the present invention.

FIG. 8 is a diagram showing an ultrasonic sensor and a reflector of a fishing reel according to another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Reel main body 1a, 1b Side plate 1c Panel part 2 Spool 3 Ultrasonic sensor 31 Curved ultrasonic sensor 4 Curved reflective plate 4 'Parabolic reflective plate 41 Planar reflective plate 5 Display 5a Warning lamp 6a Rotation detection sensor 6b Rotation sensor 7 Calibration target 8 Fishing line 9 Handle

Continued on the front page (72) Inventor Hideki Horiuchi 5-1-1, Shimorenjaku, Mitaka-shi, Tokyo F-term in Japan Radio Co., Ltd. (reference) 2B108 EA04 2F068 AA06 AA25 AA28 CC00 DD00 DD02 EE02 EE03 FF04 FF12 FF19 FF25 KK12 LL15 2F069 AA34 BB31 DD30 GG09 GG20 GG62 GG73 HH09

Claims (7)

[Claims] 1. A fishing reel provided with an ultrasonic sensor for rotatably supporting a spool for winding a fishing line between opposed side surfaces and measuring a thickness of the fishing line wound on the spool. A fishing reel provided with a reflector, through which a transmission wave and a reflected wave are propagated. 2. A fishing reel provided with an ultrasonic sensor for rotatably supporting a spool for winding a fishing line between opposed side surfaces and measuring a thickness of the fishing line wound on the spool. A fishing reel, wherein an ultrasonic sensor for transmission and reception is disposed on one side of the side surface as the ultrasonic sensor, and a reflector is disposed on a support portion bridged between the side plates. 3. The fishing reel according to claim 1, wherein the reflector has a concave curved surface. 4. The fishing reel according to claim 1, wherein said transmission / reception ultrasonic sensor has a concave curved surface shape. 5. The fishing reel according to claim 1, wherein a calibration target is provided at a predetermined position where the ultrasonic transmission wave is irradiated, so that the sound speed of the ultrasonic wave can be corrected. Fishing reel. 6. The fishing reel according to claim 5, wherein
A fishing reel, wherein the calibration target is provided on a reflection plate. 7. The fish fishing reel according to claim 1, further comprising a warning unit for warning of adhesion of dirt, water droplets, etc., based on a reception level to said ultrasonic sensor. Fishing reel.