JP2000222691A - Dynamic controller for work vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate to manage a concrete mixer truck by automatically detecting the position and work condition of the concrete mixer truck. SOLUTION: A concrete mixer truck 1 is provided with a GPS device 3, sensors 4 and 5 and 1st communication equipment 6. The GPS device 3 can freely detect the current position. The sensors 4 and 5 can freely detect a desired work state. The equipment 6 can freely transmit the position of the truck 1 obtained by the device 3, the work state obtained by the sensors 4 and 5 and data specifying the truck 1 to a management center 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to, for example, transferring a concrete mixer truck from a concrete manufacturing plant to a construction site and performing a desired operation at the construction site. Can be grasped in real time by the management center installed in the concrete manufacturing plant or the like, or the work state of the concrete mixer car can be automatically reported to a daily report creation system using an IC card. TECHNICAL FIELD The present invention relates to a work vehicle dynamics management device capable of recording information dynamically.

[0002]

2. Description of the Related Art When performing various construction works, various work vehicles are used. For example, when performing foundation work or the like at a construction site, a concrete mixer truck is used.
Such a concrete mixer truck is filled with concrete (so-called ready-mixed concrete) at a concrete manufacturing plant or the like,
Head to the construction site. Then, at the construction site, the concrete is sent out, and then heads to the factory again, fills with new concrete, and heads to the construction site.

It is important to efficiently distribute a limited number of concrete mixer vehicles in order to reduce costs. For example, even when arriving at a construction site, there may be many concrete mixer trucks arriving earlier, and the concrete mixer truck arriving later may be put on standby for a long time to send out the filled concrete.
In such a case, the occupant of the concrete mixer vehicle only waits for a long time, so that the working efficiency is poor and the cost increases. As a result, there is a disadvantage to a concrete manufacturing plant or the like that owns and manages a concrete mixer truck. In order to solve such inconveniences, a manager who manages the allocation of concrete mixer trucks is placed in a management center provided at the above-mentioned concrete manufacturing plant, etc., which owns and manages concrete mixer trucks, and manages the concrete mixer trucks. It is effective to indicate to which construction site a concrete mixer truck filled with concrete is to be sent.

[0004] However, even if the above administrator is set up,
For example, simply instructing the concrete mixer truck to go to which construction site via the wireless communication means cannot completely eliminate the above-described inconvenience. In other words, when dispatching a vehicle only via the wireless communication means,
Since the manager does not know the standby state of the concrete mixer truck at the construction site or the congestion situation from the concrete manufacturing plant to the construction site to go to, the concrete mixer vehicle arriving at the construction site does not It is not possible to avoid a situation where the user has to wait for a long time at the site.

[0005] In view of the above-mentioned circumstances, the following dynamic management devices are now considered and actually used. That is, as shown in FIG. 3, a GPS device 3 for detecting the current position of the concrete mixer vehicle 1 (see FIG. 4), actual vehicle running, standby, unloading, forwarding, cleaning of the concrete mixer vehicle 1 , An operation panel 13 capable of selectively inputting information on dynamics such as factory standby, occupant breaks, and factory car washing, and the position of the concrete mixer vehicle 1 obtained by the GPS device 3 and the operation panel 13 A first communication for transmitting the information on the dynamics and data specifying the concrete mixer vehicle 1 (for example, a vehicle number assigned to each vehicle) to the management center 2 installed in the concrete manufacturing company or the like. And an apparatus 6. At the same time, a second communication device (not shown) capable of receiving information transmitted from the communication device 6 in the management center 2 and the concrete device based on the information received by the second communication device. A display device (not shown) capable of freely displaying the position of the mixer car 1 and the work content.

The concrete mixer truck 1 travels on a real vehicle, waits at a site, unloads, forwards, cleans a site, waits at a factory,
The rest of the occupant and the factory car wash have the following meanings, respectively. First, the actual running of the vehicle indicates a state from a state where concrete is loaded at a concrete manufacturing plant or the like to a state where the concrete vehicle arrives at a construction site. Next, the above-mentioned on-site standby refers to a state in which concrete cannot be sent out at the construction site, and is separately on standby. Next, unloading refers to a state where concrete is being sent out at a construction site. Next, forwarding refers to a state in which concrete is sent out at a construction site and is moving toward a concrete manufacturing plant. Next, on-site cleaning refers to a state in which a water supply pump attached to a concrete mixer truck is used. Next, factory standby refers to a state of waiting for loading of concrete at a concrete manufacturing factory. Next, rest of an occupant or the like refers to a state where an occupant such as a driver takes a rest. Finally, factory car washing refers to a state in which delivery work has been completed and the inside and outside of the rotating drum of the concrete mixer car has been washed at the above-mentioned concrete manufacturing plant or the like.

The operation of managing the dynamics of the concrete mixer truck 1 using the above-described conventionally-known concrete mixer truck dynamics management device is as follows. That is, an operator or the like operates the operation panel 13 for each of the above states, and transmits to the management center 2 via the first communication device 6 the current state of the movement. This transmission information
The second communication device installed in the management center 2 receives and
Display on the display. The manager determines which concrete mixer vehicle 1 is to be sent to which construction site by looking at the display screen on which the dynamics of all currently used concrete mixer vehicles 1 are displayed. The communication management center 2 and each concrete mixer truck 1 are provided with a wireless communication means different from the second communication device or the first communication device. The manager sends an instruction to the concrete mixer vehicle 1 from the management center 2 about the content of the judgment via the wireless communication means. The worker such as the driver of the concrete mixer vehicle 1 receiving this instruction by the wireless communication means provided on the concrete mixer vehicle 1 goes to a predetermined construction site according to the instruction. As a result, the concrete mixer truck 1 can be efficiently dispatched, and the inconveniences such as unnecessary cost increase are eliminated.

[0008]

However, in the case of the above-described conventional dynamic management device, there are the following inconveniences. In other words, when performing various operations using the concrete mixer truck 1, the worker operates the operation panel 13
You may forget to operate. For example, when the construction work is proceeding at a rapid pace, there is a case where only the progress of the work is considered and the switch on the operation panel 13 is forgotten to be pressed. In such a case, the manager or the like cannot grasp what kind of work the concrete mixer car 1 is currently performing, and cannot perform efficient vehicle allocation.

Further, of the operations performed by the concrete mixer truck 1, for example, a normal rotation operation (concrete stirring operation) of the rotary drum 12 (see FIG. 4) and the rotary drum 12
Reverse rotation operation (concrete delivery operation), or water supply operation to the inside and outside of the rotating drum 12 such as a hopper attached to the concrete mixer truck 1, a concrete delivery chute, the inside of the rotating drum 12, and the like. Are provided outside the vehicle in addition to the inside of the driver's seat, so that another person may operate the lever or switch contrary to the intention of the operator. In such a case, work that is different from the work content transmitted to the management center 2 via the operation panel 13 is performed, so that instructions such as vehicle allocation are far from reality. In addition, the transmission of the work content is performed only by the operator's operation via the operation panel 13, so that an unauthorized operation may be performed for the convenience of the operator. For this reason, the appearance of a device for automatically detecting the working state of the concrete mixer truck 1 has been eagerly sought among concerned persons.

The present invention has been made in view of the above-mentioned circumstances, and relates to dynamics such as a position and a working state of a work vehicle, which can be detected automatically and almost in real time, or an existing IC card can be used. It is an object of the present invention to provide a work vehicle dynamics management device that can automatically record the above dynamics in a daily report automatic creation system used.

[0011]

In order to achieve the above object, a work vehicle dynamics management device according to the present invention includes the position of a work vehicle and the contents of work performed by the work vehicle. This is for managing the dynamics of the work vehicle at the management center. Similar to the above-described conventional structure, the work vehicle is selectively provided with a GPS device for detecting a current position and information on the dynamics of the work vehicle. An operation panel that can be freely input to the control center and information on the position of the work vehicle obtained by the GPS device, the information on the dynamics input through the operation panel, and data specifying the work vehicle are transmitted to the management center. And a first communication device. In the management center, a second communication device capable of freely receiving information transmitted from the communication device, and a position and a work content of the work vehicle based on the information received by the second communication device. And a display device that can freely display. In particular, in the work vehicle dynamics management device according to the first aspect, the work vehicle is provided with a detection device that detects at least a part of the work state of the dynamics of the work vehicle. Then, the work state detected by the detection device can be automatically transmitted via the first communication device.

The basic operation when managing the dynamics of the work vehicle using the work vehicle dynamics management device according to the present invention configured as described above is the same as that of the above-described conventional structure. That is, the current position of the work vehicle is measured by the GPS device provided on the work vehicle. The position information at this time is sent to the second communication device of the management center by the first communication device, and the position of the work vehicle is displayed on the display device. This allows a manager or the like in the management center to accurately grasp the current position of the work vehicle. Further, when the work vehicle performs various works at a construction site, the worker or the like operates the operation panel and transmits what work is currently performed via the first communication device. . Then, this information is displayed on the display device. Therefore, an administrator or the like in the management center can grasp in real time what kind of work the work vehicle is performing.

[0013] In particular, in the work vehicle dynamics management device according to the first aspect, the work vehicle is provided with a detection device that detects at least a part of the work state of the dynamics of the work vehicle. The work state detected by the detection device can be automatically transmitted via the first communication device. As a result, as for the contents of the work, the information is automatically transmitted to the management center, so that inconvenience such as erroneous information being transmitted against the intention of the worker is solved. Therefore, the manager or the like can accurately and in real time grasp the dynamics of the work vehicle, thereby contributing to efficient construction work.

It is fully conceivable that various information is transmitted from the plurality of work vehicles to the management center almost simultaneously. In such a case, a configuration in which transmission is performed again after a predetermined time has conventionally been adopted. However, if transmission has failed for a predetermined number of times, transmission is not performed. Such a configuration hinders accurate vehicle allocation and the like. In order to solve such inconvenience, claim 2
Can be adopted. That is, the work vehicle includes the first control device. When the information transmitted by the first communication device is not received by the second communication device, the first control device is capable of temporarily storing the information. At the same time, the information is transmitted via the first transmitting device at predetermined time intervals until the second communication device receives the information.

With the above-described configuration, even when various information is transmitted from the plurality of work vehicles to the management center almost simultaneously, the above information can always be transmitted later, which hinders accurate vehicle allocation and the like. Will not occur.

Further, as described in claim 3, a second control device can be provided in the management center. The second control device has a function of, based on the information received by the receiving device, storing a work place and a work content of each work vehicle within a predetermined period and outputting the work place and the date and time in chronological order via the display device. To have. According to this configuration, not only can the dynamics of the work vehicle be managed in real time, but also what kind of work was performed at the construction site by the work vehicle during a predetermined period can be known. Further, it is helpful to produce a monthly report (monthly report) and the like for the work vehicle, and the production of the report and the like becomes easy.

It is to be noted that, specifically, the working vehicle may be a concrete mixer vehicle. Further, in this case, as the detection device, at least one sensor that detects the forward rotation of the rotating drum, the reverse rotation of the rotating drum, and the inoperative state of the rotating drum, and the driving state of a pump that supplies water to the inside and outside of the rotating drum. And a sensor for detection. According to this configuration, when another person operates a lever or a switch related to the operation of the rotary drum or the pump contrary to the intention of the operator, the content of the operation is immediately and automatically transmitted to the communication center. Therefore, it is possible to quickly take a countermeasure thereafter, which has a large practical effect.

Further, according to the present invention, as described in claim 5, information from at least one sensor for detecting the forward / reverse rotation of the rotating drum of the concrete mixer truck and the inoperative state of the rotating drum is provided. And information from a sensor for detecting a driving state of a pump for supplying water into and out of the rotary drum is automatically recorded on an IC card which is a recording medium for creating a daily report.

[0019]

Next, an embodiment of the present invention will be described. The work vehicle dynamics management device according to the present embodiment is an example in which the present invention is applied to a concrete mixer vehicle 1 (see FIG. 4), and concrete including the position of the concrete mixer vehicle 1 and the contents of work performed by the concrete mixer vehicle 1. The dynamics of the mixer truck 1 is managed by a management center 2 provided in a concrete manufacturing plant or the like that owns and manages the concrete mixer truck. In such a work vehicle dynamics management device according to the present embodiment,
The concrete mixer vehicle 1 has a GPS device 3 for detecting the current position, an operation panel 13 for selecting dynamic information such as a factory standby state of the concrete mixer vehicle 1, and a work performed by the concrete mixer vehicle 1. Sensors 4 and 5 which are detection devices for detecting a part of the work state, the position of the concrete mixer truck 1 obtained by the GPS device 3 and the work state selected via the operation panel 13 A first communication device 6 for transmitting the working state obtained by the sensors 4 and 5 and data (for example, a vehicle number assigned to each vehicle) specifying the concrete mixer vehicle 1 to the management center 2; , Is provided. In the management center 2, there are second communication devices 7, 7 for receiving information transmitted from the first communication device 6, and information received by the second communication devices 7, 7. A display 8 and a printer 9 capable of freely displaying the position and the work content of the concrete mixer truck 1
It has. The display 8 and the printer 9 are
This corresponds to a display device described in the claims.

Further, in this embodiment, a first control device (microcomputer: MPU) as described below is attached to the concrete mixer car 1 described below. That is,
The first control device (not shown) transmits the information transmitted by the first communication device 6 to the second communication device 7,
7, when the information is not received, the information can be temporarily stored. At the same time, the information is transmitted at predetermined time intervals (for example, 5 minutes) via the first communication device 6 until the second communication devices 7 and 7 receive the information. As the storage means for performing the above-mentioned storage, a semiconductor memory device or the like attached to the first control device can be used. Due to recent advances in semiconductor technology and the like, this type of memory device has been provided with a very large storage capacity at a low price. The device according to the present embodiment employs such a semiconductor memory device.

Further, in the case of the present embodiment, the rotation of the rotary drum 12 in the forward direction, the rotation of the rotary drum 12 in the reverse direction,
Sensors 4 and 4 for detecting the stationary state (non-operating state) of 2
And a sensor 5 for detecting a driving state of a pump for supplying water to the inside and outside of the rotary drum 12. The work state detected by each of the sensors 4 and 5 can be automatically transmitted via the first communication device 6. In other words,
Sensors 4 and 4 for detecting the presence or absence of rotation of the rotary drum 12 and the direction of rotation, and water inside and outside the rotary drum 12 such as a hopper attached to the concrete mixer truck 1, a chute for feeding concrete, and the inside of the rotary drum 12. 5 for detecting on / off of a pump for supplying oil
When the sensors 4 and 5 detect the forward rotation, the reverse rotation or the stationary state of the rotary drum 12 and the on / off state of the water supply pump, the first control device operates and the first The communication device 6 transmits the status.

As shown in FIG. 2, the rotation of the rotary drum 12 is switched between the wires 14 by a lever operation. For this reason, the sensors 4, 4 for detecting the presence or absence of rotation of the rotary drum 12 and the rotation direction thereof are provided at both ends in the rotation direction of the connecting plate 15 connecting the wires 14, 1. A pair of limit switches can be employed. In this case, the stationary state of the rotary drum 12 can be detected when none of the pair of limit switches detects the proximity of the connection plate 15. Alternatively, instead of the limit switch, a conventionally known sensor such as a torque sensor for detecting a torque of a shaft supporting the rotary drum 12 or a rotation sensor for detecting the presence or absence of rotation of the shaft may be employed.
As the sensor 5 for detecting on / off of a pump for supplying water to the inside and outside of the rotary drum, a conventionally known sensor capable of detecting the on / off state of a pump drive switch, for example, can be employed. . The sensors 4, 5
Corresponds to a detection device for detecting at least a part of the movement of a work vehicle with respect to a work state described in the claims. In other words, in the present embodiment, at least a part of the working state of the working vehicle described in the claims is related to the working state of the rotating drum 12 in the forward rotation, the reverse rotation, the stationary state, and the state of the pump. Driving state,
It is. However, in the present invention, the present invention is not limited to the structure of this embodiment, and the “at least a part of the working state of the working vehicle regarding the working state” is referred to as the forward rotation and the reverse rotation of the rotating drum 12. The driving state of the pump or another working state relating to the dynamics of the concrete mixer car 1 may be set.

Further, a second controller 10 (personal computer: MPU) is provided in the management center 2. The second control device 10 stores a work place and work contents of each concrete mixer vehicle 1 within a predetermined period (for example, one month) based on the information received by the second communication devices 7 and 7. In addition, application software for outputting the data in the order of date and time via the display 8 is installed.

The operation of managing the dynamics of the concrete mixer vehicle 1 using the work vehicle dynamics management device according to the present embodiment configured as described above is as follows. That is, the G provided in the concrete mixer truck 1
The PS device 3 measures the current position of the concrete mixer vehicle 1. The position information at this time is sent to the second communication devices 7 and 7 of the management center 2 by the first communication device 6, and the position of the concrete mixer car 1 is displayed on the display 8. If necessary, a printer 9
To print. This allows an administrator or the like in the management center 2 to accurately grasp the current position of the concrete mixer vehicle 1. In addition, the above-mentioned position display
The user is pointed on the map displayed on the display 8.

Further, the concrete mixer truck 1 has
The sensors 4 and 5 are provided.
Is automatically transmitted via the first communication device 6 and displayed on the display device 8. For this reason, as for the work content, the information is automatically transmitted to the management center 2, so that the inconvenience such as incorrect information being transmitted against the intention of the worker related to the concrete mixer vehicle 1 is solved. You. Therefore, the manager or the like can accurately and in real time grasp the dynamics of the concrete mixer vehicle 1 and can contribute to efficient construction work. The dynamic information other than the work content detected by the sensors 4 and 5 is transmitted to the management center 2 by the first communication device 6 via the operation panel 13 as described later, similarly to the conventional structure.

Further, in the case of the structure according to the present embodiment, when the information transmitted by the first communication device 6 is not received by the second communication devices 7, 7, the first control device Can temporarily store the information.
At the same time, the information is transmitted at predetermined time intervals (for example, every five minutes) via the first transmission device 6 until the second communication device 7 receives the information. For this reason, even when various information is transmitted from the plurality of concrete mixer vehicles 1 to the management center 2 almost at the same time, the above-mentioned information can always be transmitted later, which does not hinder accurate vehicle allocation.

Further, since the second control device 10 is provided in the management center 2, not only can the dynamics of the concrete mixer vehicle 1 be managed in real time, but also for a predetermined period (for example, one month). In addition, it is possible to know what kind of construction site and what kind of work the concrete mixer car 1 has performed. Further, it is helpful to produce a monthly report (monthly report), a daily report, and the like for the concrete mixer vehicle 1, and the above-mentioned monthly report and daily report can be easily produced.

Among the dynamics of the concrete mixer car 1, there are a standby state at the site, a rest state of an operator related to the vehicle, an unloading state, a forwarding state, and a car washing state.
Is transmitted to the management center 2 via the operation panel 13 as in the conventional structure described above. However, it is also possible to transmit these states without going through the operation panel 13. For example, when the concrete mixer vehicle 1 has arrived at the construction site by the GPS device 3 but the signal from the sensors 4 and 5 has not reached by the GPS device 3, the standby state is the second standby state. The control device can make a determination.

In the above-described embodiment, an example in which the working vehicle is applied to the concrete mixer vehicle 1 has been described. However, the present invention is not limited to this. It can also be applied to other work vehicles. Further, in the case of the illustrated example, each of the first communication device 6 and the second communication device 7 employs a digital MCA radio. The number of the second communication devices 7, 7 is appropriately determined according to the number of the concrete mixer vehicles 1 owned and managed. When the manager issues various instructions to the concrete mixer trucks 1, the management center 2 and the concrete mixer trucks 1 perform the respective instructions via wireless communication means separately provided. The second communication devices 6 and 7 are capable of bidirectional communication, and various instructions are transmitted using the first and second communication devices 6 and 7 without providing the wireless communication means. You can also do so. The first,
As the second communication devices 6 and 7, a conventionally known communication device such as a device using a PHS can be employed in addition to the above-mentioned MCA radio.

The operation panel 13 is provided with a function (a so-called filter function) for rejecting a state in which the state is far from the actual movement of the concrete mixer truck 1 when the state is selected. Of course, in this embodiment, such a function is added. Furthermore, in the above-described embodiment, the dynamic information of each concrete mixer truck 1 is transmitted to one management center 2, but the present invention is not limited to this, and a plurality of The center 2 may be provided for each predetermined area or the like so that the dynamic information transmitted from each concrete mixer vehicle 1 can be received by the plurality of management centers 2. In this case, the second control device (computer) installed in each management center 2 is connected, for example, by LAN. Needless to say, a server machine for controlling each second control device (client machine) is placed in one management center 2. Then, the dynamic information of each concrete mixer truck 1 collected at each management center 2 is transmitted to, for example, a server machine via the network, and the server machine organizes and manages the dynamic information. Further, the manager in each management center 2 performs the optimal vehicle allocation and the like while mutually contacting the managers based on the organized dynamic information. With this configuration, more efficient vehicle allocation and the like can be performed. FIG.
Reference numeral 11 indicates a relay base when communication of dynamic information is performed.

According to the present invention, in place of the above embodiment, information from at least one sensor for detecting the forward / reverse rotation of the rotating drum of the concrete mixer truck and the inoperative state of the rotating drum, Information from a sensor that detects the driving state of a pump that supplies water to the inside and outside of the rotating drum,
It is also possible to configure so that it is automatically recorded in a daily report automatic creation system using an existing IC card. this is,
At the time of the above-mentioned work dynamics, since the driver leaves the seat, he may forget to press the use confirmation switch of the pump or the rotating drum, and it is difficult to create an accurate daily report. Since it can be automatically recorded, an accurate daily report can be easily created.

[0032]

The working vehicle dynamics management device according to the present invention is constructed and operates as described above, so that an administrator or the like placed in a concrete manufacturing factory or the like can check the running state of the concrete mixer vehicle as well as the current state. Automatically know what kind of work you are doing. As a result, it is easier to set future policies for efficient construction work,
The practical effect is enormous. In addition, by automatically recording the dynamics in the automatic daily report creation system using an IC card, an accurate daily report can be easily created and the management can be facilitated.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing an example of a position embodiment of the present invention.

FIG. 2 is a diagram schematically showing a forward / reverse switching portion of a rotary drum.

FIG. 3 is a view similar to FIG. 1, showing a conventional structure.

FIG. 4 is a schematic side view showing a concrete mixer truck.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Concrete mixer truck 2 Management center 3 GPS device 4, 5 sensor 6 First communication device 7 Second communication device 8 Display 9 Printer 10 Second control device 12 Rotary drum 13 Operation panel

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Takanori Murata 2-24-1, Nishiazabu, Minato-ku, Tokyo F-Term in the Service Center of the Company (Reference) 5H180 AA07 BB04 CC12 FF01 FF05 FF10 FF13 5J062 AA08 BB01 CC07

Claims (5)

[Claims] 1. A GPS device for detecting a current position of a work vehicle including a position of the work vehicle and contents of work performed by the work vehicle at a management center so as to manage the movement of the work vehicle. An operation panel which can selectively input information on the dynamics of the work vehicle, the position of the work vehicle obtained by the GPS device, the information on the dynamics inputted via the operation panel, and the data specifying the work vehicle are described above. A first communication device that transmits to the management center, and, while providing a second communication device capable of receiving information transmitted from the communication device in the management center, the second communication device Based on the received information, a display device capable of freely displaying the position of the work vehicle and the work content,
The work vehicle dynamics management device, comprising: a detection device that detects at least a part of a work state in the dynamics of the work vehicle, wherein the work state is detected by the detection device. A dynamic management device for a work vehicle, wherein automatic transmission is enabled via the first communication device. 2. The work vehicle includes a first control device, wherein the first control device is configured to operate when information transmitted by the first communication device is not received by the second communication device. The information is temporarily storable and transmitted at predetermined time intervals via the first communication device until the information is received by the second communication device. The work vehicle dynamics management device according to claim 1. 3. A second control device is provided in the management center, and the second control device is provided for each work vehicle within a predetermined time period based on information received by the second communication device. 3. The work vehicle dynamics management device according to claim 1, further comprising a function of storing a work place and work contents and outputting the work place and work contents in chronological order via the display device. . 4. The work vehicle is a concrete mixer truck, and the detecting device detects forward rotation of the rotating drum, reverse rotation of the rotating drum, and a non-operating state of the rotating drum.
4. The work vehicle dynamics management device according to claim 1, further comprising at least one sensor and a sensor for detecting a driving state of a pump for supplying water to the inside and outside of the rotary drum. 5. A sensor for detecting information from at least one sensor for detecting forward / reverse rotation of a rotating drum and a non-operating state of the rotating drum of a concrete mixer truck, and a driving state of a pump for supplying water to the inside and outside of the rotating drum. Characterized in that the information is automatically recorded on an IC card as a recording medium for creating a daily report.