Shoes with sensor

Abstract

To provide a velocity measuring apparatus capable of being attached to a human being who moves an object etc for competition to easily measure the initial velocity of the object, and a velocity measuring method using the same.SOLUTION: Shoes with a sensor include: an antenna that emits waves of prescribed frequency to an object for measuring the velocity and receives a reflection waves of the waves from the object; a Doppler sensor for detecting a Doppler signal from the reflection waves and outputting the Doppler signal, and wearable means 3 of the antenna to the human being, in which the shoes with a sensor emit the wave to the object and detect the Doppler signal by receiving the reflection waves when the object leaves from the body part of the human being that comes in contact with the object or an object intervening between the human being and the object.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a human-wearable speed measuring device that measures the speed of an object after the change when the speed of the object is changed by applying a force to the object using the force of the human body, and a speed measuring method using the same. [Background technology]

[0002] Conventionally, devices using Doppler sensors are known to measure the moving speed of a ball in various sports such as baseball, golf, and tennis. A microwave Doppler sensor emits microwaves to a moving object to be measured and measures the reflected waves from the object. Because the frequency of the reflected waves changes depending on the moving speed of the object due to the Doppler effect, the difference in frequency between the emitted wave and the reflected wave is detected, and the speed of the object is derived from a signal having the frequency of this difference, i.e., a Doppler signal. Depending on conditions such as speed and measurement environment, an ultrasonic Doppler sensor using ultrasonic waves can also be used.

[0003] The speed measuring device described in Patent Document 1 is a speed measuring device having a display means using a microwave Doppler sensor. This device is installed in a place away from people to measure moving objects, and by switching the processing means that generates display information for a number of different sports such as baseball and golf, it is possible to select a measurement mode for the initial velocity and final velocity of a ball, or the swing speed of a baseball bat or a golf club.

[0004] The device described in Patent Document 2 uses a low-cost, small-sized microwave Doppler sensor that can be installed near the object to be measured. Specifically, the device described can be worn on the glove or wrist of a player catching a ball, which is the object to be measured.

[0005] Meanwhile, in bowling, as described in Patent Document 3, a device is known that detects the speed of a passing ball based on the time it takes for the ball to pass between two sensors installed on the sides of the lane and the distance between the sensors. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] JP 2011-152291 A [Patent Document 2] Patent No. 3237857 [Patent Document 3] Japanese Patent Application Publication No. 10-211314 Summary of the Invention [Problem to be solved by the invention]

[0007] The speed measuring device described in Patent Document 1 is installed at a certain distance from the measurement target such as a ball, and therefore requires a certain amount of microwave power for measurement, which limits the miniaturization and cost reduction of the device. On the other hand, when a person uses a speed measuring device for training, it is important to know the speed of the ball or the like at a constant position from the body. For example, in pitching or throwing sports, the ball or the like usually has a maximum speed when it leaves the body, and it is important to know that speed, that is, the initial speed. When the speed measuring device is placed independently of the person as in Patent Document 1, the position of the person standing and the position of the body part that touches the ball are not always constant, so the relative positional relationship between the ball to be measured and the body part of the person is not constant.

[0008] The velocity measuring device described in Patent Document 2 is a small device that can be worn by a person, but that person is the person receiving the pitched ball. Therefore, since the Doppler sensor is located away from the pitcher, it is difficult to measure the ball velocity close to the pitcher's body, such as the initial velocity mentioned above.

[0009] In particular, in the case of bowling, in order to improve throwing technique, it is effective to grasp the initial speed of the ball and stabilize it, or to find an initial speed that suits oneself. However, as described in Patent Document 3, conventionally, the speed of the ball while traveling on the lane is detected by a sensor installed beside the lane, and there was no easy way to measure the initial speed of the ball when released by the bowler.

[0010] The object of the present invention is to solve the above-mentioned problems and to provide a speed measuring device for human wear that can be worn by a person moving an object, such as the object of a competition, and that can easily measure the initial speed of the object, and a speed measuring method using the same. [Means for solving the problem]

[0011] In a first aspect, the present invention provides a human-wearable speed measuring device for measuring the speed of an object after a human applies a force to the object by using the strength of his or her body to change the speed of the object, the device comprising a Doppler sensor that emits waves of a predetermined frequency toward the object and receives the waves reflected from the object, detects and outputs a Doppler signal from the reflected waves, and means for attaching the antenna to the human, characterized in that when the object moves away from a part of the human's body that is in contact with the object or an object between the human and the object, the device emits the waves toward the object and receives the reflected waves to detect the Doppler signal.

[0012] In the first aspect, when a human applies force to an object using the strength of his or her body to change the speed of the object, for example, when he or she holds an object such as a ball in his or her hand and releases it, or when he or she hits a ball with a hand or foot, a bat, a racket, or the like to change the speed vector in the opposite direction, and the speed after the change is, for example, the speed immediately after it is released or immediately after it is hit. In addition, when the object separates from a body part in contact with the object or from something intervening between the object and the body, for example, the time immediately before the object separates, the moment at which the object separates, or immediately after the object separates.

[0013] For example, in bowling, where a ball with low rebound force is held and thrown, the maximum speed is the speed just before or at the moment it leaves the hand; in baseball or handball, where a ball with high rebound force is thrown, the maximum speed is the speed just before or immediately after it leaves the hand; in sports such as volleyball or soccer, where a ball with high rebound force is used, or in baseball or golf batting, tennis, table tennis, etc., where equipment is used between the ball and the body, the maximum speed is the speed just after the ball leaves the hand, foot, bat, golf club, racket, etc.

[0014] In addition, the velocity of an object measured in the present invention is, for example, a velocity component in a direction connecting the antenna and the object. As a means for attaching an antenna to a human, for example, the antenna itself may be directly attached to the human, or the antenna may be indirectly attached to the human through an object such as clothing, hat, or shoes worn by the human. That is, "attaching" in the present application may be, for example, a configuration in which the antenna is directly attached, or a configuration in which the antenna is indirectly attached through some object. In particular, it is preferable that the antenna is attached in a state in which it moves integrally with the movement. For example, "for human attachment" may be a configuration in which the antenna is directly attached to the human, or a configuration in which the antenna is indirectly attached to the human through some object. In particular, it is preferable that the antenna is attached in a state in which the antenna moves integrally with the movement of the human.

[0015] In addition, the radiation of the waves from the antenna may be continuous from the start to the end of the object's movement, for example, the waves may be radiated in the direction of the object when the object moves away from a body part in contact with the object or from an object intervening between the object and the antenna. In the present invention according to the first aspect, for example, the antenna of the Doppler sensor is installed near the object to be measured, such as a ball, and the power consumption is reduced, thereby making the device smaller, and by attaching the device to the human body, which serves as the reference position, the initial velocity of the object can be easily measured.

[0016] In the Doppler sensor used in the present invention, the part attached to the human body may be only the antenna, or only the antenna and amplifier, but if the entire Doppler sensor is small and lightweight, it is preferable to make the entire Doppler sensor attachable. Objects in the present invention include, for example, a javelin for a javelin throw or a discus for a discus throw other than a ball, and the speed of an object can be measured even when a human throws an object by force in a general task other than a sport, and any object can be targeted.

[0017] Furthermore, recent advances in microwave Doppler sensor technology have made the sensor device more sensitive, smaller, and less expensive. For example, by using such a microwave Doppler sensor in the present invention, a more sensitive, smaller, and less expensive device can be obtained. For example, a means for storing data on the speed of an object measured by a Doppler sensor is provided, and initial velocity data, etc. is stored in a memory element, etc., and compared with a video of the athletic movement after a competition or training, etc., to improve the athlete's technique. For example, the initial velocity data, etc. stored in a memory element, etc. after measurement can be imported into an external personal computer, etc., and statistical and analytical processing can be performed, thereby improving the athlete's technique.

[0018] In a second aspect, the present invention provides a human-worn speed measuring device according to the first aspect, characterized in that the wearing means is a means for wearing the antenna on a body part other than the body part that transmits force to the object. In throwing sports using heavy objects such as hammer throw and shot put, it may be possible to wear a small, lightweight speed measuring device on the arm, which is the body part that transmits force to the object. However, in many other sports, it is desirable to minimize the effect of wearing the device of the present invention on body movements during the sport, i.e., to prevent it from interfering with the sport.

[0019] In the second aspect of the present invention, the antenna is attached to a body part other than the body part transmitting force to an object, for example, in the case of throwing with the arm, the head, shoulders, torso, feet, etc., other than the arm, so that the influence on the physical movement during the game can be reduced. Furthermore, since the antenna is attached to a body part other than the body part transmitting force to an object, the antenna is less susceptible to the influence of the Doppler signal caused by the movement of the antenna accompanying the movement of the body part when transmitting force to the object, compared to the case where the antenna is attached to the body part transmitting force to the object.

[0020] For example, in the first aspect, when a human applies force to an object using the strength of his or her body, a configuration can be adopted that makes comprehensive use of the strength of many parts of the body, whereas in the second aspect, the body part that transmits force to the object is, for example, a part of the body that has a body part that contacts the object or a body part that holds an implement or the like that is interposed between the object and the body, such as the entire arm when the hand contacts the object or holds an implement, or the entire leg when the foot is used to change speed.

[0021] In a third aspect, the present invention provides a human-wearable speed measuring device according to the second aspect, characterized in that the wearing means is a means for wearing the antenna on a body part other than the body part that transmits force to the object, the body part being in contact with the object or the body part in which the rate of change of position when the object separates from an object interposed between the object and the body part is smaller than that of other parts. Since the speed measured by the Doppler effect is the relative speed between the antenna and the object, it is desirable to wear the antenna at a position where the rate of change of position during measurement is small.

[0022] In a fourth aspect, the present invention is characterized in that in the human-wearable speed measuring device according to the second or third aspect, the attachment means is a means for attaching the antenna to a body part other than the body part that transmits force to the object, and in which muscles contract or relax less than other parts when a force is applied to the object.

[0023] The fourth aspect of the present invention has a means for attaching the antenna to a body part having muscles that are not used much when transmitting force to an object, or to a body part having few muscles, so that the influence on physical movements during a game can be further reduced. Also, the antenna can be made less susceptible to the Doppler signal caused by the movement of the antenna position due to the contraction or relaxation of muscles when transmitting force to an object.

[0024] In a fifth aspect, the present invention provides a human-wearable speed measuring device according to any one of the second to fourth aspects, characterized in that the wearing means is a means for wearing the antenna on a body part other than the body part that transmits a force to the object, the body part being a body part through which the object passes close when the object leaves the body part that transmits the force to the object or the tool held on the body part. Installing the antenna on a body part closer to the object to be measured is effective in reducing the power consumption and size of the device, and also makes it easier to measure the initial speed of the object.

[0025] In a sixth aspect, the present invention provides a human-wearable speed measuring device according to any one of the first to fifth aspects, characterized in that the wearing means is a means for positioning the antenna such that the direction in which the object moves when the object leaves a body part in contact with the object or an object intervening between the object and the wearer is included in the range of directions in which the antenna has directivity. By matching the directivity of the antenna to the moving direction of the object, the measurement accuracy can be improved. In particular, it is preferable to set the range of directions in which the antenna has directivity to within the range of a half-power angle. In this way, the speed can be measured more reliably.

[0026] In a seventh aspect, the present invention provides a human-wearing velocity measuring device according to any one of the first to sixth aspects, characterized in that the object is a bowling ball. In particular, by using the present invention according to the seventh aspect in bowling, for example, the initial velocity of the ball when released by the bowler can be easily measured.

[0027] In an eighth aspect, the present invention provides a human-worn speed measuring device according to the seventh aspect, characterized in that the attachment means is a means for attaching the antenna to the pivot foot of the person bowling. When a bowling ball is thrown, the ball usually passes by the foot that moves forward when released, that is, the pivot foot, specifically the left foot when bowling with a right hand, and the right foot when bowling with a left hand, so by attaching the entire Doppler sensor or the antenna of the Doppler sensor to the pivot foot, measurement accuracy is improved. In addition, it is less likely to interfere with the game.

[0028] In a ninth aspect, the present invention provides a human-worn speed measuring device according to the eighth aspect, characterized in that the attachment means is a means for attaching the antenna to a part of the bowler's supporting foot below the knee or to a shoe worn by the bowler on the supporting foot. Specifically, the attachment means is a means for attaching to the knee, ankle, foot, shoe, etc. In the case of attaching to a shoe, the attachment means may be a means for attaching each time bowling is performed or a means for embedding in the shoe. By attaching the entire Doppler sensor or the antenna of the Doppler sensor to a part closer to the ball passing by, the device can be made smaller and lighter by reducing the power consumption, and the measurement accuracy can be improved.

[0029] In a tenth aspect, the present invention is characterized in that, in a human-wearable speed measuring device according to any one of the first to ninth aspects, the device has a display means for displaying the speed of the object measured by the Doppler sensor, and the display surface of the display means is configured to be positioned in a position visible to the human immediately after the object has separated from a body part in contact with the object or an object intervening between the object and the human.

[0030] For example, if the antenna is installed in a body part below the head of the person, the radiation direction of the antenna is horizontally forward, and the antenna and the display means are integrated, the display surface can be located on the upper surface of the antenna. Alternatively, a display connected to the Doppler sensor by wire or wireless communication may be provided, and the display may be installed in a position where the person can easily see it. In addition, in the present invention, instead of the display means, a means for notifying the person of the speed of the object by voice may be provided.

[0031] In an eleventh aspect, the present invention provides a human-worn speed measuring device according to any one of the first to tenth aspects, characterized in that the Doppler sensor is a microwave Doppler sensor, and the wave emitting surface of the antenna is configured to be arranged inside clothing worn by the human. In the case of a microwave Doppler sensor, since electromagnetic waves pass through general clothing, the antenna or the entire device may be configured to be worn inside clothing, a hat, a supporter, or the like. However, when the speed display means according to the tenth aspect is worn, it is preferable to configure the display unit so that it is not covered by the clothing or the like in order to make it visible to the human.

[0032] In a twelfth aspect, the present invention provides a speed measuring device for wearing on a human according to any one of the first to eleventh aspects, characterized in that the Doppler sensor is integrally constructed within a housing, the housing has a battery for driving the Doppler sensor, and the housing has a means for wearing the housing on the human.

[0033] In the twelfth aspect of the present invention, the antenna and circuitry constituting the Doppler sensor are integrated into, for example, a single housing, and the housing has a means for attaching the housing to a person. Also, since a battery is built into the housing as a driving power source for the Doppler sensor, there is no need to connect the Doppler sensor to a power line. By making the device smaller and removing the wiring from the device, the effect on the physical movements of the athlete can be minimized.

[0034] In a thirteenth aspect, the present invention provides a speed measuring method using a human-wearable speed measuring device as defined in any one of claims 1 to 12, for measuring the speed of an object after a human applies a force to the object by using the strength of his or her body to change the speed of the object.

[0035] In a fourteenth aspect, the present invention provides a program for causing a computer to function as the human-wearable speed measuring device according to any one of the first to twelfth aspects. Effect of the Invention

[0036] According to the human-wearable speed measuring device of the present invention, a human-wearable speed measuring device and a speed measuring method using the same can be obtained that can be worn by a human moving an object, for example, as the subject of a competition, and can easily measure the initial speed of the object. [Brief description of the drawings]

[0037] [Figure 1] FIG. 1 is a perspective view showing a speed measurement device to be worn by a human according to a first embodiment. [Diagram 2] FIG. 2 is a block diagram showing an example of the configuration of a microwave Doppler sensor which is a main part of the first embodiment. [Diagram 3] 1 is a perspective view showing a state in which a speed measurement device for human wear of Example 1 is worn on a human ankle. [Figure 4] FIG. 11 is a perspective view showing a speed measurement device to be worn by a human according to a second embodiment. [Diagram 5] FIG. 11 is a perspective view showing a speed measurement device to be worn by a human according to a third embodiment, the device being worn on a shoe. [Figure 6] FIG. 13 is a perspective view showing a speed measurement device to be worn by a human according to a fourth embodiment, the device being worn on a shoe. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0038] The present invention will be described in more detail below with reference to the examples shown in the drawings, but the present invention is not limited thereto. EXAMPLES

[0039] FIG. 1 shows a speed measuring device 100 for human wear according to the first embodiment. The speed measuring device 100 for human wear is a device for measuring the speed of a ball when the person releases or hits the ball, and is provided with a means for wearing on the ankle of the person who releases or hits the ball. In particular, the device is suitable for measuring the speed of a ball when a bowler releases the ball. When used for throwing a bowling ball, the device is worn on the ankle of the supporting foot. When throwing a baseball or softball, the device is worn on the ankle of the foot that steps forward, not on the supporting foot. When measuring the speed of a ball after it has been kicked by a soccer player, the device is worn on the ankle of the supporting foot.

[0040] As shown in FIG. 1, the speed measuring device 100 for wearing on a human is composed of a sensor main body 1 having a microwave Doppler sensor 10 built into a single housing, and a wrapping belt 3 which is a means for wearing the sensor main body 1 around a human ankle.

[0041] The sensor main body 1 is substantially rectangular, with one side thereof serving as the surface to be attached to the body, and the length in the direction protruding from the body being shorter than the length in the direction along the body, so as not to interfere with the physical movements in the above-mentioned exercises or sports. The wrapping belt 3 is made up of two belts, one end of which is fixed to the sensor main body 1 and the other end of which is provided with a tape-like fastener, and the sensor main body 1 is attached to the ankle by sticking the tape-like fasteners together.

[0042] Sensor main body 1 also has a display means for displaying the measured ball speed, and is equipped with display surface 4 that displays the measured speed. Emission surface 2 of microwaves 5 is provided on the surface opposite the surface that is worn on the body, and display surface 4 is provided above emission surface 2. Display surface 4 is made visible when a person wearing human-wearable speed measuring device 100 looks in the direction of the device.

[0043] Fig. 2 is a block diagram showing an example of the configuration of a microwave Doppler sensor which is a main part of this embodiment. As shown in Fig. 2, in a microwave Doppler sensor 10, microwaves generated by a microwave transmitter 12 are emitted from an antenna 11 and reach a measurement object, and the microwaves reflected by the measurement object are received by the antenna 11 again. This received reflected wave is mixed with a signal generated by the microwave transmitter 12 in a mixer 13. When the measurement object has a relative speed with respect to the antenna, the frequency of the reflected wave changes due to the Doppler effect, and a signal having a frequency corresponding to the difference appears at the output of the mixer 13. This signal is amplified by an amplifier 14 and output.

[0044] In the case of FIG. 2, the antenna 11 is shared by both transmission and reception, but separate antennas for transmission and reception may be provided. A patch antenna, a horn antenna, or the like can be used as the antenna 11. The output of the microwave Doppler sensor 10 is processed in a processing circuit in the sensor body 1 and converted into velocity data. For example, the sensor may be configured to include a microwave Doppler sensor 10 with an output frequency of a predetermined frequency such as 24.15 GHz, a comparator that compares the output signal of the Doppler sensor (a signal in which one wave corresponds to a movement of 6 mm at the above frequency) with a reference value and outputs a Doppler pulse (a high level signal if the signal is equal to or greater than the reference value, and a low level signal if the signal is less than the reference value), a microcontroller (control unit) that receives the signal output from the comparator, measures the time of one period of the Doppler pulse using a reference clock, and determines the velocity, and a display as a display means that displays the velocity under the control of the microcontroller.

[0045] Alternatively, instead of the comparator, or in addition to providing a comparator, the output signal of the Doppler sensor may be input to a microcontroller (controller) and the frequency of the output signal may be calculated by performing predetermined signal processing such as FFT, and the velocity may be calculated and displayed on a display means. The above processing circuit may be a processing circuit similar to that of the related art. For example, a configuration similar to that shown in FIG. 2 of JP-A-2008-246139 or FIG. 4 of JP-A-2010-25737 may be used. For example, the amplifier 14 may be provided outside the Doppler sensor.

[0046] Fig. 3 shows a state where human-worn speed measuring device 100 is worn on a human's ankle. As shown in Fig. 3, human-worn speed measuring device 100 is used by being worn, for example, on the ankle of the supporting foot of a person bowling. Fig. 3 shows a case where the device is worn on the left foot when bowling with a right hand, and is attached so that antenna emission surface 2 faces forward, and microwaves 5 are radiated forward, that is, in the direction in which the ball moves when it leaves the hand.

[0047] In this case, the period of radiation of microwaves 5 from the antenna may be continuous from the start to the end of the game, or may be arbitrarily set to a certain period of time from the start of the bowling motion, or a certain period of time from when the ball leaves the hand. In this embodiment, the ball passes close to the left foot when released, so by attaching the main body 1 to the pivot foot, the distance between the ball and the antenna is reduced, improving measurement accuracy. Also, attaching the device to the ankle in this way does not interfere with the bowling motion.

[0048] Furthermore, the rate at which the ankle changes position when the ball leaves the hand is smaller than that of other parts of the foot, and fluctuations in the antenna position due to muscle contraction or relaxation during the throwing motion are also small, so the ankle is less susceptible to Doppler signals caused by antenna movement. Since the maximum value of the measured speed is the initial speed of the released ball, the display means should display this maximum speed on the display surface 4. A memory element may be built into the sensor main body 1 to store the speed data therein, or wireless means may be built in to transmit the speed data to a display device, computer, or the like in a remote location.

[0049] To realize such functions, a communication interface, a memory element insertion port, and the like may be provided in the sensor body 1. If a separate display is provided, the sensor body 1 may be attached to the inside of clothing. Although not shown, the sensor body 1 is provided with an operation switch. Also, a battery is built in to supply power to the microwave Doppler sensor 10 and the like. EXAMPLES

[0050] 4 shows a human-worn speed measuring device 200 according to Example 2. In this example, the same members as those in Example 1 are given the same reference numerals, and duplicated explanations will be omitted. The speed measuring device 200 to be worn by a person is a device for measuring the speed of a ball when the person releases or hits the ball, and is provided with a means for wearing the device on the knee of the person who releases or hits the ball. In FIG. 4, a speed measuring device 200 to be worn by a human is composed of a sensor body 1 incorporating a microwave Doppler sensor similar to that in the first embodiment, and a fixing belt 6.

[0051] In this embodiment, the sensor body 1 is also in the shape of a rectangular parallelepiped, one side of which is the surface to be attached to the body, and the length in the direction protruding from the body is shorter than the length in the direction along the body, so as not to interfere with the physical movements in the above-mentioned exercises and competitions. The microwave 5 emitting surface is attached to face the front of the knee. When used for bowling pitching, it is attached to the knee of the supporting foot. When pitching baseball or softball, it is attached to the knee of the foot that steps forward, not the supporting foot. When measuring the speed of the ball after kicking in soccer, it is attached to the knee of the supporting foot. The speed of change in the position of the knee at the moment the ball leaves the hand or foot is relatively smaller than other parts, and the change in the position of the antenna due to muscle contraction or relaxation is also small, so it is less susceptible to the Doppler signal caused by the movement of the antenna.

[0052] The fastening belt 6 is preferably made of a stretchable material such as rubber, and a knee supporter may also be used. The sensor main body 1 has a display means for the measured ball speed, and is provided with a display surface 4 for the measured speed on top of the emission surface 2 for the microwaves 5. The sensor main body 1 may be attached to the inside of the fastening belt, or when the display surface 4 is not used, the sensor main body 1 may be attached to the inside of clothing.

[0053] In this embodiment as well, the speed of the ball can be measured at a position where the relative distance and direction to the body of the person throwing the ball remains almost constant, which can effectively contribute to training and skill improvement in each sport. EXAMPLES

[0054] FIG. 5 shows a state where the speed measuring device 300 for human wear according to the third embodiment is attached to a shoe. The speed measuring device 300 for human wear is a device for measuring the speed of a ball when the person releases or hits the ball, and is provided with a means for attaching to the shoe worn by the person who releases or hits the ball. In particular, the device is suitable for measuring the speed of the ball when the person bowls releases the ball. When used for bowling, the device is attached to the shoe worn on the pivot foot. When pitching in baseball or softball, the device is attached to the shoe worn on the foot that steps forward, not the pivot foot. When measuring the speed of the ball after kicking in soccer, the device is attached to the shoe worn on the pivot foot.

[0055] As shown in Fig. 5, the speed measuring device 300 worn by a human is composed of a sensor body 20 with a built-in microwave Doppler sensor, and a means for attaching the device to a shoe 26 (not shown). The sensor body 20 is substantially rectangular, one side of which is used as a shoe attachment surface, and is configured so as not to interfere with the body movements during the above-mentioned exercise or sport. The device is worn in such a way that the radiation surface 2 of the microwaves 5 faces the front of the shoe 26. Sensor main body 20 also has a display means for displaying the measured ball speed, and is provided with a display surface 24 for the measured speed on top of emission surface 22 for microwave 5. Sensor main body 20 is provided with an operation switch, and has a built-in battery for supplying power to the microwave Doppler sensor, etc.

[0056] In this embodiment, the means for attaching the sensor to the shoe 26 can be, for example, a removable tape-like fastener that can be attached to the underside of the sensor main body 20 and the attachment point of the shoe 26, a hook can be provided on the underside of the sensor main body 20 and hooked onto a shoelace, or the sensor can be secured to the shoe with a rubber belt or the like.

[0057] In this embodiment as well, the speed of change in the position of the shoe wearing device 300 at the moment the ball leaves the hand or foot is small, and the influence of muscle contraction or relaxation during the throwing motion is small, so the Doppler signal is less susceptible to the movement of the antenna. For example, in the case of bowling, the ball passes close to and beside the shoe worn on the supporting foot when released, so by wearing sensor main body 20 on that shoe, the distance between the ball and the antenna is shortened, improving measurement accuracy. EXAMPLES

[0058] FIG. 6 shows a state where a speed measuring device 400 for human wear according to the fourth embodiment is worn on a shoe. As with the third embodiment, the speed measuring device 400 for human wear is a device for measuring the speed of a ball when the person releases or hits the ball, and is provided with a means for attaching the device to the shoe worn by the person who releases or hits the ball. In particular, the device is suitable for measuring the speed of a ball when a person playing bowling releases the ball. The foot worn in each sport is also the same as that of the third embodiment.

[0059] 6, in the human-worn speed measuring device 400, the sensor body 30 incorporating the microwave Doppler sensor is integrated and embedded in the shoe. The emitting surface 2 of the microwave 5 is fixed so as to face the front of the shoe. Sensor main body 30 also has a display means for displaying the measured ball speed, and is provided with a display surface 34 for the measured speed on top of emission surface 32 for microwave 5. Sensor main body 30 is provided with an operation switch, and has a built-in battery for supplying power to the microwave Doppler sensor, etc.

[0060] In this embodiment, the sensor body 30 is embedded in the shoe, which eliminates the need for installation, and provides excellent fixing strength and stability as a mounting means. Other effects similar to those of the third embodiment can be obtained. [Explanation of symbols]

[0061] 1, 20, 30 Sensor body 2 Emission surface 3 Wrapping belt 4, 24, 34 display surface 5. Microwave 6 Fixation belt 10 Microwave Doppler Sensor 11 Antenna 12 Microwave transmitter 13 Mixer 14 Amplifier 26 Shoes 100, 200, 300 Human-worn speed measuring device

Claims

1. A speed measuring device that is worn on a person's body and measures the speed of an object, an antenna for emitting a wave of a predetermined frequency toward the object and receiving the reflected wave of the wave from the object; A sensor for detecting the reflected wave; A means for attaching the antenna to the person; a display that displays the speed based on the detection result of the reflected wave; Equipped with The period during which the antenna emits the wave of the predetermined frequency can be set from a plurality of periods. Speed ​​measuring device.

2. The plurality of periods include at least one of a period from the start to the end of a predetermined sport, a certain period from the start of a predetermined sporting motion, and a certain period from the separation of the object from the body.

2. The speed measuring device according to claim 1.

Images