JPH0533080U - Hermet for alarm device - Google Patents

Abstract

(57) [Summary] [Purpose] An easy-to-handle helmet for alarms that enables search workers to receive search ultrasonic waves regardless of posture and sound an alarm near the work vehicle on the worker side. To get. [Structure] Mouse-type sensor device bodies 2, 3 (52, 53) are detachably attached to both sides of the Helmet body 1, and at least two or more of these sensor device bodies 2, 3 (52, 53) are provided. An ultrasonic wave transmitter / receiver 5, a first transmission / reception circuit 6 for driving and controlling each ultrasonic wave transmitter / receiver 5 as necessary,
The ultrasonic transmitter / receiver 5 is provided with an alarm buzzer 7 which is activated by being controlled by the first transmission / reception circuit 6, a power supply circuit 8 for each of these constituent means, and a power supply switch 8A for the power supply circuit 8. The sensor device main bodies 2 and 3 (52, 53) are arranged at the central portion of the outer surface, the upper end portion of the outer surface, and both left and right side surfaces of the outer surface.

Description

[Detailed description of the device]

[0001]

[Industrial application]

 The present invention relates to a helmet for an alarm device, and more particularly to a helmet for an alarm device that sends a predetermined ultrasonic pulse signal to an alarm device or the like equipped on a work vehicle for construction.

[0002]

[Prior Art]

 In road construction, there are many cases where construction vehicles such as roller cars and workers work on the road at the same time. For this reason, for the purpose of preventing danger, the roller wheel is equipped with a back sonar, for example, at its rear part. When an abnormal object is detected, the driver's seat is relatively equipped with an alarm means such as immediately issuing an alarm or automatically operating the brake to stop the roller vehicle.

On the other hand, the detection means such as a backsonner reacts with respect to all objects existing in the detection area because it does not have any selectivity. For this reason, there is an inconvenience in that the work vehicle automatically stops when working on a utility pole or fence that the driver plans to avoid in advance, which is a hindrance to the progress of work.

By the way, during work, it is obligatory for the worker to wear a helmet for safety, but it is very difficult for some workers to look around the back, especially when wearing the helmet. Was becoming.

Therefore, when the work vehicle approaches the worker from behind, it is necessary to notify the worker of the danger by some method.

For this reason, another worker was made to constantly monitor the danger, but it is best if he / she can know his / her own danger, not only by others.

[0007]

[Object of the Invention] The present invention has been made in consideration of such a situation, and in particular, on the worker side, it is possible to effectively receive search ultrasonic waves from a work vehicle regardless of the posture of the worker. At the same time, the worker side can output ultrasonic waves of a predetermined frequency to the work vehicle, and the worker side can sound an alarm near the work vehicle if necessary. The aim is to provide a durable helmet for alarm devices.

[0008]

[Means for Solving the Problems]

 Therefore, in the present invention, the helmet main body and the sensor device main body detachably mounted on the helmet main body are provided, and each sensor device main body is provided with one or more ultrasonic wave transducers and A drive control circuit for driving and controlling the ultrasonic transmitter / receiver as necessary, an alarm buzzer operated by being controlled by the drive control circuit, a drive power supply circuit for driving each of these constituent means, and a power supply circuit for this power supply circuit. Power supply switch, and the ultrasonic transducers are arranged at the center of the outer surface of the sensor device, the upper end of the outer surface, and the left and right side surfaces of the outer surface, respectively. There is. This aims to achieve the above-mentioned purpose.

[0009]

First Embodiment Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. 1 to 4. The block diagram shown in FIG. 1 shows the whole warning device for a work vehicle, and the helmet according to the present invention is also included in this. FIG. 2 shows a road roller as a work vehicle.

In the embodiment shown in FIGS. 1 and 2, the work vehicle outputs an ultrasonic wave for searching a target object, and the target object that receives the ultrasonic wave returns a ultrasonic wave having a frequency different from the ultrasonic wave. The ultrasonic wave is output and the ultrasonic wave for reply is detected by the work vehicle side, and the round trip time of the ultrasonic wave is measured based on this detection signal to find the distance between the work vehicle and the target object. The configuration is such that the alarm means is activated when the distance is shorter than the distance.

To further explain this in detail, in the embodiment shown in FIGS. 1 and 2, the ultrasonic wave transmitting / receiving means 20 which is provided in the work vehicle 100 and outputs ultrasonic waves for searching a target object, a worker, etc. Of the ultrasonic wave transmitting / receiving means 20 which is mounted on the target object and operates when receiving the ultrasonic wave for searching, and outputs a returning ultrasonic wave having a frequency different from the frequency of the received signal. The ultrasonic wave transmitting / receiving means 4 is provided. In this embodiment, the target object is the helmet body 1 that the worker always wears.

The reply ultrasonic wave transmission / reception means 4 equipped in the helmet body 1 includes four reply wave transmitters / receivers 5 for inputting / outputting wide band ultrasonic waves, and a reception signal attached to the reply wave transmitter / receiver 5. And a first transmission / reception circuit 6 that outputs a reply pulse signal (excitation signal for the reply transceiver 5) having a frequency different from the frequency.

On the other hand, the ultrasonic wave transmitting / receiving means 20 for searching equipped on the work vehicle 100 side is composed of, for example, three ultrasonic wave transmitters / receivers 20A, 20B, 20C. The three ultrasonic wave transmitters / receivers 20A, 20B, 20C are mounted on one surface of the work vehicle 100 at equal intervals and at the same height, as shown in FIG. Of these, the ultrasonic transducers 20A and 20C on the outer side are installed inward so that the outer boundary line of the spread of the directivity is substantially parallel to the moving direction of the roller wheel 100 as shown in FIG. There is. The three ultrasonic wave transmitters / receivers 20A, 20B, 20C are driven in parallel by a second transmitter / receiver circuit 21 attached to the ultrasonic wave transmitters / receivers 20A, 20B, 20C.

The second transmission / reception circuit 21 has a parallel driving function for driving the three ultrasonic wave transmitters / receivers 20A, 20B, 20C in parallel, and any one of the three ultrasonic wave transmitters / receivers 20A, 20B, 20C. It has a reception information detecting function of sending the ultrasonic wave detected by the above and the timing signal at the time of driving the ultrasonic wave receivers 20A, 20B, 20C described above to the signal processing circuit 22 as a signal for target object determination.

The signal processing circuit 22 includes a time difference detection circuit 23 and a risk determination circuit 24 that determines whether or not a target object such as a worker located in time within the time difference detection circuit 23 is within the danger distance S. It is composed of and. The risk determination circuit 24 is composed of a comparison circuit 24A and a reference signal output circuit 24B. If the time corresponding to the detection distance related to the output of the time difference detection circuit 23 is shorter than the time corresponding to the danger distance S set in advance by the reference signal output circuit 24B, the danger determination circuit 24 immediately detects the danger. A signal is output, the alarm means 26 and the brake control means 27 of the work vehicle 1 are operated via the interface 25, and at the same time, the aforementioned ultrasonic wave transmitting / receiving means 20 for searching is driven via another circuit to give a predetermined alarm. The signal can be sent to the helmet body 1.

The helmet main body 1 is provided with two sensor device main bodies 2 and 3 in this embodiment. The above-mentioned reply ultrasonic wave transmitting / receiving means 4 is provided in each of the two sensor device main bodies 2 and 3.

In the present embodiment, the two sensor device main bodies 2 and 3 are formed in the same manner, including the storage member. Therefore, one sensor device body 2 will be described in detail here.

As described above, the sensor device main body 2 includes at least four ultrasonic wave transmitters / receivers 5 and a first drive control circuit for driving and controlling the ultrasonic wave transmitters / receivers 5 as necessary. A transmitter / receiver circuit 6, an alarm buzzer 7 which is activated by being controlled by the first transmitter / receiver circuit 6, a drive power supply circuit 8 for driving each of these constituent means, and a power supply switch 8A for the power supply circuit 8 are provided. Equipped.

The four ultrasonic wave transmitters / receivers 5 are provided on the central portion 2A of the outer surface of the sensor device body 2, the upper end portion 2B of the outer surface, and the left and right side surfaces 2C and 2D of the outer surface, respectively. .. On the back side of the sensor device body 2, two suction cups 10A and 10B are vertically installed. At the center of the lower end of the sensor device body 2, a leaf spring helmet engaging mechanism 9 is provided.

As shown in FIGS. 3 and 4, the helmet engaging mechanism 9 is bent into a relatively wide U-shape, and a leaf spring to which a locking force is applied so that the bent ends contact each other. It is made of a material. The helmet body 1 side of the leaf spring member is somewhat rounded to have a guide function. The sensor device body 2 side of the leaf spring member is fixed to the sensor device body 2. Therefore, due to the action of the helmet attachment mechanism 9, the sensor device main body can be attached to and detached from the helmet body very easily. The interaction of 9 effectively prevents its disengagement.

In addition, as shown in the figure, the vibration surface of each of the ultrasonic wave transmitters / receivers 5 mounted on the sensor device main bodies 2 and 3 is inclined (15) except for the ultrasonic wave transmitter / receiver 5 at the center of the outer surface. (Or at 30 °). For this reason, when the sensor device bodies 2 and 3 are installed on the left and right of the helmet body 1, for example, by combining the ultrasonic transducers on both sides, which are respectively installed backward and forward, There is an advantage that the ultrasonic transmission / reception area can be set to a wide angle.

Further, the sensor device body 2 shown in FIG. 1 is equipped with a power switch control means 11. This power switch control means 11 is provided with a tilt detection sensor 11A, which has a switch-on control function for outputting an ON control signal for the power switch while the tilt detection sensor 11A is operating, and at the same time when the output of the vibration detection sensor is stopped. It has a timer circuit 11B which is activated and operates for a fixed time, and has a switch-off control function for outputting an OFF control signal for the power switch at the same time when the operation of the timer circuit 11B is completed.

Therefore, even when the power is on, the power switch 8A is automatically set to the off state when the helmet body 1 is removed from the head and a certain period of time elapses, thereby sufficiently saving energy. Has been.

Next, the overall operation of the first embodiment will be described.

First, when the entire apparatus enters the operating state in the state of FIG. 1, the excitation signal of the predetermined frequency output from the second transmission / reception circuit 21 is sent to the search ultrasonic wave transmission / reception means 20. The two ultrasonic wave transmitters / receivers 20A, 20B, 20C are simultaneously activated to simultaneously output the ultrasonic waves for searching as shown in FIG. The ultrasonic wave transmitters / receivers 20A, 20B, 20C for search have their ultrasonic wave output states switched to the ultrasonic wave reception state after a lapse of a certain time by the action of the transmission / reception circuit.

Before or after this switching operation, when the return ultrasonic wave transmitting / receiving means 4 receives the search ultrasonic wave, the first transmitting / receiving circuit 6 is immediately started, and ultrasonic wave excitation signals of different frequencies are generated. It is applied to the ultrasonic wave transmitter / receiver 5. As a result, the ultrasonic wave transmitter / receiver 5 outputs a returning ultrasonic wave having a frequency different from that of the searching ultrasonic wave. This return ultrasonic wave is detected by any of the ultrasonic wave transmitters / receivers 20A, 20B, 20C of the search ultrasonic wave transmitting / receiving means 20 in the reception state, and is a return ultrasonic wave in the second transmitting / receiving circuit 21. Is confirmed. The received signal is waveform-shaped and sent to the signal processing circuit 22. In the signal processing circuit 22, the arrival time is calculated as described above, and it is determined whether or not the target object is within the dangerous distance S. When the target object is within the danger distance S, the signal processing circuit 22 immediately outputs a predetermined signal to activate the alarm means 26, and at the same time causes the brake control means 33 of the roller vehicle 100 to perform stop control. And so on.

Therefore, in the present embodiment, since the worker (target) wearing the helmet outputs ultrasonic waves of different frequencies, the malfunction caused by the reflected wave from other foreign matter is almost completely eliminated. If the target object is located within the danger distance, the roller car 100 can immediately issue an alarm regardless of its coordinate position, which is why the fence, telephone pole, etc. are used as in the past. This eliminates the inconvenience of malfunctioning, and therefore has the advantage that the efficiency of construction work can be improved while ensuring the safety of workers.

Further, in the above-described embodiment, since the whole of the sensor device main bodies 2 and 3 are detachably mounted, maintenance and inspection is facilitated, and it is possible to remove and store at the end of the work. Therefore, the durability of the entire sensor device bodies 2 and 3 (including the internal storage member) can be remarkably increased, and even if the sensor device 2 or 3 fails, the helmet body remains as it is with other sensor devices. It has the advantage that it can be locked and disconnected.

[0029]

Second Embodiment Next, a second embodiment of the present invention will be described with reference to FIGS. The embodiment shown in FIGS. 5 and 6 is designed to reduce the weight of the entire apparatus.

That is, in the embodiment shown in FIG. 5, the helmet body 1 and the mouse type sensor device body detachably mounted on both sides of the helmet body 1 as in the first embodiment described above. 52, 53, and each of the sensor device main bodies 52, 53 is equipped with at least four ultrasonic wave transmitters / receivers 5. The four ultrasonic wave transmitters / receivers 5 are arranged at the central portion of the outer surface of the sensor device main body 52, 53, the upper end portion of the outer surface, and the left and right side surfaces of the outer surface, respectively.

The sensor device main bodies 52 and 53 are provided with the above-described alarm buzzer that is operated as necessary, and a drive control circuit that drives and controls the alarm buzzer 7 and the ultrasonic wave transmitters / receivers 5. 6, a driving power supply circuit (battery) 8 for driving each of these constituent means, a power supply switch 8A for this power supply circuit 8 and a volume 7A for setting the output level of the alarm buzzer 7 balance the weight respectively. It is divided into two parts and distributed and installed. A cable 54 that connects the electrical components of the sensor device bodies 52 and 53 is laid along the inner surface of the helmet body 1. Reference numeral 55 indicates a connector, reference numerals 56 and 57 indicate engaging members, and reference numeral 58 indicates a battery lid. The other structure is the same as that of the first embodiment described above.

In this way as well, in addition to having the same effects as the first embodiment described above, each built-in constituent means is installed in two parts, which greatly reduces the overall weight. Further, there is an advantage that the size can be reduced, and as a result, the durability of the helmet attachment mechanism 9 can be significantly increased.

In each of the above embodiments, the case where each of the sensor device main bodies 52 and 53 is equipped with four ultrasonic wave transmitters / receivers 5 has been illustrated, but the present invention is not necessarily limited to the ultrasonic wave transmitters / receivers. The number of 5 is not limited to 4.

[0034]

[Effect of the device]

 Since the present invention is constructed and functions as described above, it enables the worker side to effectively receive the search ultrasonic wave and the alarm signal from the work vehicle side regardless of the posture of the worker. Since the main body of the sensor device is detachably attached to the helmet body, inspection or repair can be performed easily, and it is easy to replace it in case of failure, so the helmet body can be used as it is. Therefore, the service life of the helmet body can be significantly improved, and the worker can sound an alarm near the work vehicle as necessary, effectively ensuring the safety of the worker. It is possible to provide a helmet for an alarm device which is practically not available and which can be carried out.

[Brief description of drawings]

FIG. 1 is a block diagram showing a first embodiment of the present invention.

FIG. 2 is an explanatory view showing an example of a work vehicle equipped with a part of the device according to FIG.

FIG. 3 to FIG. 4 are explanatory views showing the equipment status when the helmet device is equipped with the sensor device body shown in FIG. 1, respectively.

5 to 6 are explanatory views each showing a second embodiment.

[Explanation of symbols]

 1: Helmet main body 2 to 3, 52 to 53: Sensor device main body 4: Response ultrasonic wave transmitting / receiving means 5: Ultrasonic wave transmitter / receiver 6: First transmission / reception circuit as drive control circuit 7: Alarm buzzer 7A: Volume 8 : Power supply circuit for driving 8A: Power switch 9: Helmet attachment mechanism 11: Power switch control means 11A: Tilt detection sensor 11B: Timer circuit 54: Cable 100: Road roller as a work vehicle

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Masayuki Arai 2-16-46 Minami-Kamata, Ota-ku, Tokyo Within Tokimetsu Co., Ltd.

Claims (4)

[Scope of utility model registration request] 1. A helmet main body, and a sensor device main body detachably mounted on the hermet main body, and at least two or more ultrasonic wave transmitters / receivers and each ultrasonic wave are attached to each sensor device main body. A drive control circuit for driving and controlling the transducer as required, an alarm buzzer operated by being controlled by the drive control circuit, a drive power supply circuit for driving each of these constituent means, and a power supply for this power supply circuit. A helmet for an alarm device, which is equipped with a switch, and each of the ultrasonic transmitters / receivers is arranged on both side surfaces of the sensor device body. 2. A helmet body and a sensor device body detachably mounted on both sides of the helmet body, wherein each sensor device body is provided with at least two or more ultrasonic transducers. A drive control circuit for driving and controlling the ultrasonic transmitter / receiver as necessary, an alarm buzzer operated by being controlled by the drive control circuit, a drive power supply circuit for driving each of these constituent means, and a power supply circuit for this power supply circuit. Power supply switch and each of the ultrasonic transmitters / receivers are respectively arranged on both side surfaces of the sensor device body, and a helmet engaging mechanism made of a leaf spring is provided at the center of the lower end portion of the sensor device body. A helmet for an alarm device, which is equipped. 3. A helmet body and a sensor device body detachably mounted on both sides of the helmet body, wherein each sensor device body is equipped with at least two or more ultrasonic transducers. Each of these ultrasonic transducers,
An alarm buzzer, which is provided on both side surfaces of the sensor device main body and is activated in each of the sensor device main bodies, as necessary, and a drive control circuit for driving and controlling the alarm buzzer and the ultrasonic transducers. , A power supply circuit for driving each of these constituent means, a power supply switch for this power supply circuit, and a volume for setting the output level of the alarm buzzer are divided into two parts with the weights balanced and stored. A helmet for an alarm device, characterized in that a cable connecting electrical components of each of the sensor device bodies is laid along the inner surface side of the hermet body. 4. The power supply switch control means for controlling on / off of the power supply switch is provided in the sensor device main body, and the power supply switch control means is provided with an inclination detection sensor, and while the vibration detection sensor is operating. It has a switch-on control function that outputs an on-control signal for a power switch, and is equipped with a timer circuit that starts at the same time as the output of the tilt detection sensor stops and operates for a certain period of time. 4. The helmet for an alarm device according to claim 1, further comprising a switch-off control function for outputting the off-control signal.