JP2010108312A - Carrier operation measurement system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a carrier operation measurement system for easily measuring the movement position and moving speed of a carrier at a low cost with simple constitution. <P>SOLUTION: The carrier operation measurement system 1 includes: a position tag 2 installed in a carrier operation area, a tag read unit 3 installed on the carrier 10 to read position information of the position tag 2, a wheel tag 4 which is installed on a wheel 11 and detected by the tag read unit 3, a shield unit 5 which is fixed to the carrier 10 and shields an orbit of the wheel tag 4 to prevent the wheel tag 4 from being continuously detected by the tag read unit 3, a transmission unit 6 which transmits position information from the position tag 2 and detection information of the wheel tag 4 output from the tag read unit 3 as operation information of the carrier 10 to the outside of the carrier 10, a reception unit 7 which receives the information transmitted from the transmission unit 6, an arithmetic unit 8 which calculates the moving speed of the carrier 10 based upon a frequency of appearance of the received detection information, and a recording unit 9 which records the operation information including the calculation result. The tag read unit 3 is used for both the tags 2 and 4. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a transfer work measurement system that acquires information on movement and operation of a transfer carriage.

  2. Description of the Related Art Conventionally, in order to improve the efficiency of transporting a cart operated by a person at a production site, transport work measurement has been performed in which each time required for a series of transport operations is measured for the operation of the cart. For example, an IC tag with position information is installed in a building, an IC tag reader and transmitter are mounted on the carriage, and time information and the position information of the IC tag read by the reader are transmitted during the transfer operation. The data is sent to the host computer by the machine, and the work time and work content are analyzed. In this case, it is sufficient to increase the number of IC tags when it is desired to obtain detailed position information. In addition, when changing the measurement content or target, it is only necessary to change the position of the IC tag, so that it can be transported easily and flexibly. Work measurement can be performed. However, in such transport work measurement, only position information and time information at each IC tag position, that is, point-like information can be obtained. In addition, there is a limit even if the number of IC tags is increased in order to obtain operation information of a carriage moving between points.

Therefore, it is conceivable that the transport carriage is provided with measuring devices such as an encoder and an acceleration sensor, and the movement information of the transport carriage is measured and transmitted to the host computer. In this case, for example, the travel time of the cart can be distinguished from the non-moving time, the work time the worker is leaving the cart is separated from the travel time, and the breakdown of the transport work is accurately grasped it can. Further, in an unmanned transport cart that travels on a predetermined travel route and obtains the travel distance from the rotational speed of the drive wheel, the travel distance is corrected by detecting a travel distance correction point provided at a predetermined position in the travel route. There is known a traveling control system for a transport cart (see, for example, Patent Document 1).
JP-A 63-255710

  However, in the conveyance work measurement provided with the measuring device such as the encoder and the acceleration sensor as described above, the measuring device such as the encoder and the acceleration sensor and the interface cost are high. There is a problem that the operation is troublesome. Further, in the travel control system of the transport cart as shown in Patent Document 1 described above, the travel distance correction point described above corresponds to an IC tag having position information even though it is not necessary to provide an expensive measuring device. After all, there is a problem that only point-like information can be obtained.

  The present invention solves the above-described problems, and an object of the present invention is to provide a cart conveyance work measurement system that can easily and inexpensively measure the movement position and movement speed of a carriage with a simple configuration.

  In order to achieve the above object, a first aspect of the present invention provides a position tag having a plurality of position coordinates installed in a transport work area of a carriage, and a tag reading installed in a carriage that reads position information of the position tag by communication. A vehicle carrying work measuring system that acquires operation information of the carriage, and a wheel tag that is installed on a wheel of the carriage and whose presence is detected by the tag reading unit, and a wheel tag that is fixed to the carriage and that is A shielding unit that shields a circular trajectory and prevents the wheel tag from being continuously detected by the tag reading unit; position information from the position tag that is installed in the carriage and output from the tag reading unit; and A transmission unit that transmits detection information indicating that a wheel tag has been detected to the outside of the carriage as operation information of the carriage, and information that is outside the carriage and transmitted from the transmission section is received. A receiving unit, a calculation unit that calculates a moving speed of the carriage based on the appearance frequency of detection information received by the receiving unit, and a recording unit that records operation information of the carriage including a calculation result by the calculation unit; A communication unit for sending the operation information to the outside.

  According to a second aspect of the present invention, in the cart conveyance work measuring system according to the first aspect, the tag reading unit obtains at least information on the presence of a baggage from a baggage tag installed on the baggage mounted on the cart, and This is output as operation information of the cart.

  According to a third aspect of the present invention, in the cart conveyance work measuring system according to the first or second aspect, the determination wheel tag installed on the wheel on which the wheel tag is installed, and the determination wheel fixed to the cart. A determination shielding unit that shields a circular trajectory of the tag so that the determination wheel tag is detected by the tag reading unit with a phase different from or different from that of the wheel tag, and the determination wheel The tag is detected by the tag reading unit, and detection information indicating that the tag is detected is transmitted by the transmitting unit and received by the receiving unit, and the calculation unit detects detection information related to the wheel tag and the determination wheel tag. The rotation direction of the wheel on which these tags are installed is calculated on the basis of the appearance order.

  According to a fourth aspect of the present invention, in the cart conveyance work measuring system according to any one of the first to third aspects, the cart has wheels on left and right sides, and the wheel tag and the shielding portion are on the left and right sides. It is installed with respect to each of the wheels, and the calculation unit calculates the turning speed of the carriage based on the difference between the rotation speeds of the left and right wheels calculated based on the detection information relating to the left and right wheel tags.

  According to a fifth aspect of the present invention, in the cart conveyance work measurement system according to any one of the first to third aspects, the cart has wheels on the front, rear, left and right, and the wheel tag and the shielding portion are the front and rear. The calculation unit is installed for each of the left and right wheels, and calculates the turning speed and movement speed of the carriage based on each detection information related to the front, rear, left and right wheel tags.

  Invention of Claim 6 is a cart conveyance work measurement system as described in any one of Claim 1 thru | or 5. WHEREIN: The said tag reading part reads or detects each said tag with an electromagnetic wave, The cart is provided with a radio wave reflector for securing a path of radio waves for tag reading between the tag reading unit and the wheel tag or the wheel tag for determination.

  According to the first aspect of the present invention, the moving speed at each position of the transport carriage can be measured and recorded inexpensively and easily without requiring a speed measuring device, an interface, and wiring work.

  According to the invention of claim 2, it is possible to measure and record the loading time or loading time of each load at a low cost and easily at the time of stopping.

  According to the invention of claim 3, the rotational direction of the wheel, and hence the traveling direction of the carriage can be determined inexpensively and easily.

  According to the invention of claim 4, the turning speed and direction can be determined inexpensively and easily.

  According to the invention of claim 5, since more information is used, the moving speed can be stably measured against disturbances such as slip and detection failure.

  According to the sixth aspect of the present invention, even when the portion of the tag reading unit that transmits radio waves cannot secure the directivity angle and distance to the plurality of wheel tags, the radio wave path is secured by a simple radio wave reflector. Therefore, it can be read inexpensively and easily.

(First embodiment)
Hereinafter, a cart conveyance work measurement system according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows a cart conveyance work measurement system according to the first embodiment, and FIGS. 2 and 3 show tag detection signals. As shown in FIG. 1, the carriage conveyance work measurement system 1 is installed in a position tag 2 having a plurality of position coordinates installed in the conveyance work area of the carriage 10 and the carriage 10 that reads position information of the position tag 2 by communication. This is a measurement system that includes the tag reading unit 3 and acquires operation information of the carriage 10, that is, information such as movement and movement speed, stoppage, passage time and staying time at important points on the movement route. The operation information of the carriage 10 is used for improving the efficiency of the conveyance work using the carriage 10.

  The cart conveyance work measurement system 1 includes a wheel tag 4 that is installed on a wheel 11 of the cart 10 and whose presence is detected by the tag reading unit 3, and a wheel tag 4 that is fixed to the cart 10 and shields the orbit of the wheel tag 4. Is detected by the tag reading unit 3, the position information from the position tag 2 output from the tag reading unit 3 installed on the carriage 10, and detection that the wheel tag 4 has been detected. A transmission unit 6 that transmits information to the outside of the carriage 10 as operation information of the carriage 10, a reception unit 7 that is outside the carriage 10 and receives information transmitted from the transmission unit 6, and a detection received by the reception unit 7 A calculation unit 8 that calculates the moving speed of the carriage 10 based on the appearance frequency of the information, and a recording unit 9 that records operation information of the carriage 10 including the calculation result by the calculation unit 8 are provided. Instead of the recording unit 9 or in addition to the recording unit 9, a communication unit for sending operation information to the outside can be provided. Hereinafter, each component will be described in detail.

  The position tag 2 is an RFID (individual identification by radio wave) tag attached to or embedded in a floor surface. Generally, individual identification information is embedded in an RFID tag, and information is read by wireless communication at a short distance (several centimeters to several meters depending on a frequency band) using radio waves or the like. Therefore, the tag reading unit 3 reads information from the position tag 2 by radio waves. The information read from the position tag 2 is information on the coordinate value of the position where the position tag 2 is arranged. The information may not be the coordinate value itself but identification information that can determine the coordinate value. In this case, a correspondence table of identification information and coordinate values is used.

  The wheel tag 4 is detected by the tag reading unit 3 by returning a radio wave in response to the radio wave irradiated from the tag reading unit 3. The wheel tag 4 only needs to be detected by at least the tag reading unit 3 and does not necessarily have to hold identification information or the like so as to be readable. However, it is desirable that the wheel tag 4 and the position tag 2 be distinguishable. The wheel tag 4 is provided to be fixed to the wheel 11 so as to be detected by the tag reading unit 3 and to rotate together with the wheel 11. However, the shielding unit 5 is provided so as to electromagnetically shield half of the circular orbit of the wheel tag 4 that rotates together with the wheel 11 against the radio wave irradiated from the tag reading unit 3 by a metal plate or a metal net. . Therefore, the tag reading unit 3 cannot detect the presence of the wheel tag 4 at a half position of the circular orbit that is shielded by the shielding unit 5.

  The tag reading unit 3 emits radio waves downward and toward the wheel 11 to detect the position tag 2 and the wheel tag 4 under a constant control cycle during the operation of the cart conveyance work measurement system 1. The tag reading operation to receive the radio wave from is performed. When one of the tags is detected, the information is sent to the outside via the transmission unit 6. The reception unit 7, the calculation unit 8, and the recording unit 9 are configured using a computer having a reception function and a general configuration such as a CPU, a memory, an external storage device, a display device, and an input device, and processes on the computer. can do.

  Next, how the operation information of the cart 10 is acquired by the cart conveyance work measurement system 1 will be described. When the cart 10 is pushed by an operator and is moving at a constant speed, as shown in FIG. 2A, the detection signal K4 acquired by the tag reading unit 3 for the wheel tag 4 is not detected and detected. The signal periodically repeats the detection state. The repetition period T1 is the rotation period of the wheel 11 as apparent from the above. When the carriage 10 moves in the x direction, the wheel 11 rotates in the R direction. Since the period T1 corresponds to the moving speed of the carriage 10 on a one-to-one basis, the rotational speed of the wheels 11 and thus the moving speed of the carriage 10 can be obtained from the period T1. By the way, although the detection signal K4 in FIG. 2A is shown by a straight line, it is actually a set of measurement points (this is the same for other detection signals). Among the data of such measurement points, data that is equal to or greater than a predetermined threshold value is sent to the receiving unit 7 and processed by the calculation unit 8, and the moving speed of the carriage 10 is appropriately calculated according to the cycle T1. The calculated moving speed is recorded in the storage unit together with the time information.

  Further, as shown in FIG. 2B, the detection signal K2 of the position tag 2 is obtained, so that it is understood that the carriage 10 has passed over the position tag 2 at time t1. While detecting the position tag 2, the tag reading unit 3 reads position information from the position tag 2 and transmits the information via the transmission unit 6. The receiving unit 7 causes the recording unit 9 to record in time series together with the time t1 when the tag reading unit 3 detects the position tag 2. FIG. 3 is an example of the detection signal K4 having a period T2 larger than the period T1 shown in FIG. 2A, and shows that it is moving at a slower speed than the state of FIG. . Further, there is no detection signal between times t2 and t3, indicating that the carriage 10 is stopped. In addition, even if there exists a detection signal, when the signal is not changing, the stop state of the trolley | bogie 10 is also shown. These stop states are subjected to data processing by the calculation unit 8, calculated as zero speed, and recorded in the recording unit 9.

  As described above, in the recording unit 9, the moving speed including the stop state information obtained by the wheel tag 4 and the position information obtained by the position tag 2 are recorded in time series together with the time information. . Information recorded by these measurements is used for post-processing or real-time processing to display the actual movement route of the carriage 10 or to analyze the time required for movement, and is used to improve the efficiency of the conveyance work.

  Further, the period of the tag reading operation performed by the tag reading unit 3 described above is determined by a balance between the accuracy for obtaining the moving distance and the moving speed, the data processing speed in the calculation unit 8, and the storage capacity in the recording unit 9. For example, the measurement interval can be set so that one rotation of the wheel 11 can be detected in the state of the maximum speed limit when the person moves by pushing the carriage 10. In the case of this maximum speed limit, detection and non-detection of the wheel tag 4 are repeated every half rotation of the wheel 11, and the detection information of the wheel tag 4 has two types of “present” and “none” due to the shielding of the shielding part 5. Information.

  According to the cart conveyance work measurement system 1 of the present embodiment, the moving speed at each position of the conveyance cart is measured and recorded inexpensively and easily without requiring a speed measurement device, an interface, and wiring work. be able to. That is, the wheel tag 4 constitutes a rotary encoder that detects the rotation of the wheel together with the tag reading unit 3 and the shielding unit 5. And the wheel tag 4 and the shielding part 5 can be easily installed in the wheel 11 and a trolley | bogie. Further, when the position tag 2 and the tag reading unit 3 are existing, the existing tag reading unit 3 for the position tag 2 can be used as it is as a reading unit for the wheel tag 4.

(Second Embodiment)
FIG. 4 shows a cart conveyance work measurement system according to the second embodiment, and FIGS. 5A, 5B, and 5C show examples of tag detection signals. In the present embodiment, in the cart conveyance work measurement system 1 in the first embodiment, as shown in FIG. 4, the information on the presence / absence of the load 12 is further acquired and output as the operation information of the cart 10. Is. That is, the tag reading unit 3 of the present embodiment uses the load tags 12a and 12b installed on the load 12 mounted on the carriage 10 in addition to the position tag 2 and the wheel tag 4 under a certain control cycle. In order to detect, a tag reading operation is performed in which radio waves are emitted toward the lower side, the wheel 11 and the upper side, and radio waves from these tags are received. When one of the tags is detected, the information is sent to the outside via the transmission unit 6. An antenna with less directivity may be used as the irradiation radio wave. The tags such as the position tag 2, the wheel tag 4, and the luggage tags 12a and 12b can be distinguished from each other as a basic function of the tag.

  As shown to Fig.5 (a), it turns out from the time change of the detection signal K4 of the wheel tag 4 that the trolley | bogie 10 has stopped between time t1-t4. Further, as shown in FIG. 5B, since there is no detection signal Ka for the luggage tag 12a after the time t2, it can be seen that the luggage 12 having the luggage tag 12a has been unloaded from the carriage 10. Further, as shown in FIG. 5C, since there is no detection signal Kb of the luggage tag 12b after the time t3, it can be seen that the luggage 12 having the luggage tag 12b has been unloaded from the carriage 10. Information on the presence / absence of the load 12 mounted on the carriage 10 is detected by the tag reading unit 3 and is finally recorded in the recording unit 9 as operation information of the carriage 10. According to the cart conveyance work measurement system 1 of the present embodiment, it is possible to measure and record the loading time or loading time of each load 12 at a low cost easily and at a low cost.

(Third embodiment)
FIG. 6 shows a cart conveyance work measurement system according to the third embodiment, and FIGS. 7A, 7B, and 7C show examples of tag detection signals. As shown in FIG. 6, the present embodiment further includes a determination wheel tag 41 and a determination shielding portion 51 in the cart conveyance work measurement system 1 in the first or second embodiment. The rotation direction R is detected. That is, the bogie transport work measuring system 1 includes a determination wheel tag 41 installed on the wheel 11 on which the wheel tag 4 is installed, and a determination wheel tag that is fixed to the bogie 10 and shields the circuit track of the determination wheel tag 41. In order to store the determination shielding unit 51 that 41 is detected by the tag reading unit 3 with a period different from that of the wheel tag 4 and the detection information immediately before the determination of the rotation direction compared with the current detection information Storage unit 80.

  The determination wheel tag 41 is detected by the tag reading unit 3, and detection information indicating the detection is transmitted by the transmission unit 6 and received by the reception unit 7. The calculation unit 8 calculates the rotation direction R of the wheel 11 on which these tags are installed based on the appearance order of the detection information regarding the wheel tag 4 and the determination wheel tag 41.

  The determination wheel tag 41 is on the radius where the wheel tag 4 is disposed, and is disposed closer to the center. Moreover, the shielding part 51 for determination is provided so that the circumference track | orbit of the wheel tag 41 for determination may be shielded alternately by 1/4. Since the wheel tag 4 is shielded by the shielding unit 5 in half of the orbit, the determination wheel tag 41 is detected by the tag reading unit 3 under a half period of the wheel tag 4.

  As shown in FIG. 7A, the detection period in the detection signal K4 of the wheel tag 4 is T, whereas as shown in FIG. 7B, the period in the detection signal K41 of the determination wheel tag 41. Is T / 2. Here, as shown in FIG. 7C, when the detection signal K4 and the detection signal K41 are summed, a detection signal KG having an asymmetric waveform with respect to the time axis t is obtained. The waveform being asymmetric with respect to the time axis t means that the rotation direction of the wheel 11 can be determined from the waveform of the detection signal KG.

  The situation shown in FIG. 7C shows a state in which the carriage 10 in FIG. 6 moves in the x direction and the wheel 11 rotates in the R direction. The value of the detection signal KG changes as (0 → 2), (2 → 1), or (1 → 0) with the lapse of time t. If the time change of the value of the detection signal KG changes as (0 → 1), (1 → 2), or (2 → 0), the carriage 10 is in the x direction. It can be concluded that it is moving in the opposite direction and rotating in the opposite direction to the R direction. In order to determine the rotation direction, the calculation unit 8 needs to compare past detection information with current detection information, and the storage unit 80 stores the previous detection information. The storage unit 80 can also be built in the calculation unit 8.

  According to the cart conveyance work measurement system 1 of the present embodiment, the rotational direction of the wheel 11 and thus the traveling direction of the cart 10 can be determined inexpensively and easily.

(Fourth embodiment)
FIG. 8 shows a cart conveyance work measurement system according to the fourth embodiment, and FIGS. 9A, 9B, and 9C show examples of tag detection signals. In the present embodiment, the determination shielding portion 51 in the third embodiment is shared with the shielding portion 5. That is, the wheel tag 41 for determination in this embodiment is arrange | positioned in the wheel 11 on the radius different from the radius on which the wheel tag 4 is arrange | positioned, and the detection signal of the wheel tag 4 and the detection of the wheel tag 41 for determination are detected. The rotation direction of the wheel 11 is determined by changing the phase of the time change of the signal. The angle θ formed by both radii may be 0 ° <θ <180 °, but 90 ° is preferable. In the present embodiment, θ = 90 °.

  Further, as shown in FIGS. 9A and 9B, there is a difference between the magnitude k2 of the detection signal K4 of the wheel tag 4 and the magnitude k1 of the detection signal K41 of the determination wheel tag 41. Therefore, as shown in FIG. 9C, when the detection signal K4 and the detection signal K41 are summed, a detection signal KG having an asymmetric waveform with respect to the time axis t is obtained. The waveform being asymmetric with respect to the time axis t means that the rotation direction of the wheel 11 can be determined from the waveform of the detection signal KG. If the time change of the value of the detection signal KG changes as 0 → k1 → k2 → (k1 + k2), it is concluded that the carriage 10 moves in the x direction and rotates in the R direction. be able to. The time difference δ is a phase difference generated corresponding to the angle θ described above. Moreover, the period of the detection signal K4 and the detection signal K41 is the same T.

  FIGS. 10A, 10B, and 10C correspond to the case where k1 and k2 described above are equal to each other. In this case, as shown in FIG. 10C, the detection signal KG obtained by adding the detection signal K4 and the detection signal K41 has a symmetrical waveform with respect to the time axis t. Also in this case, the rotation of the wheel 11 is detected by the detection signal K4 and the detection signal K41 by assuming that the wheel tag 4 and the determination wheel tag 41 are signals that are distinguished from each other in the same manner as a general tag. The direction can be determined. Looking at this as the time change of the detection signal KG in FIG. 10C, for example, (no detection) → (K4 detection) → (K4, K41 detection) → (K41 detection) → (no detection). It can be seen that it is asymmetric. According to the cart conveyance work measurement system 1 of the present embodiment, the rotation direction of the wheels 11 and thus the traveling direction of the cart 10 can be determined easily and inexpensively by the simple shielding unit 5.

(Fifth embodiment)
FIG. 11 shows a cart conveyance work measurement system according to the fifth embodiment. In this embodiment, the turning speed of the carriage 10 is calculated in the carriage conveyance work measurement system 1 according to any one of the first to fourth embodiments. That is, in the bogie conveyance work measuring system 1 of the present embodiment, the bogie 10 has wheels 11 on the left and right sides, and the wheel tag 4 and the shielding unit 5 (not shown) are installed on each of the left and right wheels 11. . In addition, the calculation unit 8 calculates the turning speed of the carriage 10 based on the difference between the rotation speeds of the left and right wheels 11 calculated based on the detection information regarding the left and right wheel tags 4. In addition, the wheel 11a in a figure is a steering wheel. According to the cart conveyance work measurement system 1 of the present embodiment, the turning speed and direction can be determined easily and inexpensively.

(Sixth embodiment)
FIG. 12 shows a cart conveyance work measurement system according to the sixth embodiment. In the present embodiment, the moving speed is measured using more information in the cart conveyance work measurement system 1 of any one of the first to fourth embodiments. That is, in the bogie conveyance work measuring system 1 of this embodiment, the bogie 10 has wheels 11, 11a on the front, rear, left, and right, and a wheel tag 4 and a shielding portion 5 (not shown) are provided on the front, rear, left, and right wheels 11, 11a, respectively. The computing unit 8 calculates the turning speed and the moving speed of the carriage 10 based on the detection information relating to the front, rear, left and right wheel tags 4. In addition, the wheel 11a in a figure is a steering wheel. According to the cart conveyance work measurement system 1 of the present embodiment, since more information is used, it is possible to stably measure the moving speed against disturbances such as slip and detection failure. For example, the moving speed can be represented by the average value of the moving speed obtained from each wheel.

(Seventh embodiment)
FIG. 13 shows a cart conveyance work measurement system according to the seventh embodiment. In any one of the first to sixth embodiments, the cart conveyance work measurement system 1 according to the present embodiment includes a tag reading unit 3 and a wheel when the tag reading unit 3 reads or detects each tag 4 by radio waves. A carriage 10 is provided with a radio wave reflecting plate 31 for securing a tag reading radio wave path between the tag 4 or the determination wheel tag 41 (not shown). According to the cart conveyance work measurement system 1 of the present embodiment, even if the portion 30 that transmits the radio wave of the tag reading unit 3 cannot secure the directivity angle φ and the distance to the plurality of wheel tags 4, it is inexpensive and easy. It becomes readable.

  The present invention is not limited to the above-described configuration, and various modifications can be made. For example, the configurations of the above-described embodiments can be combined with each other. In the above-described embodiment, the four-wheel cart 10 is illustrated and described. However, the present invention can be applied to the cart 10 as well as four wheels. Moreover, the cart 10 is not limited to one operated by being pushed or pulled by a person, and the present invention can be applied to a cart that moves autonomously. Further, the shielding part 5 and the judgment shielding part 51 are not limited to semicircular or four semicircular ones as shown in FIGS. 1, 4 and 6, but may be shielding parts having a smaller or larger shielding area. Good. In addition, the rotational positional relationship between the shielding unit 5 and the determination shielding unit 51 and the rotational positional relationship between the wheel tag 4 and the determination wheel tag 41 in FIG. 6 are not limited to those illustrated, and may be arranged at other rotational positions. .

The typical block diagram of the trolley | bogie conveyance work measuring system which concerns on the 1st Embodiment of this invention. (A) is a time change figure of the detection signal of the wheel tag detected in a system same as the above, (b) is a time change figure of the detection signal of the position tag detected in relation to (a). The time change figure which shows the other example of the detection signal of the wheel tag detected in a system same as the above. The typical block diagram of the trolley | bogie conveyance work measuring system which concerns on 2nd Embodiment. (A) is a time change figure of a detection signal of a wheel tag detected in a system same as the above, (b) (c) is a time change figure showing an example of a detection signal of a luggage tag detected in connection with (a), respectively. . The typical block diagram of the trolley | bogie conveyance work measuring system which concerns on 3rd Embodiment. (A) is a time change figure of the detection signal of the wheel tag detected in a system same as the above, (b) is a time change figure of the detection signal of the wheel tag for judgment detected in connection with (a), (c) is The time change figure of the signal which synthesize | combines the detection signal of (a) and (b). The side view of the wheel part which shows arrangement | positioning of the wheel tag of the cart conveyance work measurement system which concerns on 4th Embodiment, and the wheel tag for determination. (A) is a time change figure of the detection signal of the wheel tag detected in a system same as the above, (b) is a time change figure of the detection signal of the wheel tag for judgment detected in connection with (a), (c) is The time change figure of the signal which synthesize | combines the detection signal of (a) and (b). (A) is a time change figure of the detection signal of the wheel tag detected in a system same as the above, (b) is a time change figure showing other examples of the detection signal of the wheel tag for judgment detected in connection with (a). (C) is a time change figure of the signal formed by combining the detection signals of (a) and (b). The typical block diagram of the bogie conveyance work measuring system which concerns on 5th Embodiment. The typical block diagram of the bogie conveyance work measuring system which concerns on 6th Embodiment. The typical block diagram of the cart conveyance work measurement system which concerns on 7th Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Carriage conveyance work measurement system 2 Position tag 3 Tag reading part 4 Wheel tag 5 Shielding part 6 Transmitting part 7 Receiving part 8 Calculation part 9 Recording part (or communication part)
DESCRIPTION OF SYMBOLS 10 Bogie 11, 11a Wheel 12 Baggage 12a, 12b Baggage tag 31 Radio wave reflector 41 Judgment wheel tag 51 Judgment shielding part

Claims (6)

Carriage transfer work that includes a position tag having a plurality of position coordinates installed in a transfer work area of the carriage and a tag reading unit installed in the carriage that reads the position information of the position tag by communication to acquire operation information of the carriage In the measurement system,
A wheel tag installed on a wheel of the carriage, the presence of which is detected by the tag reading unit;
A shielding unit that is fixed to the carriage and shields a circular orbit of the wheel tag to prevent the wheel tag from being continuously detected by the tag reading unit;
A transmission unit that transmits position information from the position tag that is installed in the cart and output from the tag reading unit and detection information that the wheel tag is detected to the outside of the cart as operation information of the cart;
A receiving unit that is external to the carriage and receives information transmitted from the transmitting unit;
A calculation unit that calculates a moving speed of the carriage based on the appearance frequency of the detection information received by the reception unit;
A cart conveyance work measurement system comprising: a recording unit that records operation information of the cart including a calculation result by the computing unit; or a communication unit that sends the operation information to the outside.   2. The cart conveyance according to claim 1, wherein the tag reading unit obtains at least baggage presence information from a baggage tag installed on a baggage mounted on the cart and outputs the information as operation information of the cart. Work measurement system. A determination wheel tag installed on a wheel on which the wheel tag is installed;
A determination shielding unit which is fixed to the carriage and shields the orbit of the determination wheel tag so that the determination wheel tag is detected by the tag reading unit with a phase or a period different from that of the wheel tag; Further comprising
The determination wheel tag is detected by the tag reading unit, and detection information indicating the detection is transmitted by the transmitting unit and received by the receiving unit,
The said calculating part calculates the rotation direction of the wheel in which these tags were installed based on the appearance order of the detection information regarding the said wheel tag and the said wheel tag for determinations, The Claim 1 or Claim 2 characterized by the above-mentioned. The cart transportation work measurement system described. The cart has wheels on the left and right, and the wheel tag and the shield are installed for each of the left and right wheels,
The said calculating part calculates the turning speed of the said cart with the difference of the rotational speed of the right-and-left wheel calculated based on each detection information regarding the said left-and-right wheel tag. The cart conveyance work measurement system according to claim 1. The carriage has wheels on the front, rear, left and right, and the wheel tag and the shielding part are installed on each of the front, rear, left and right wheels,
The cart according to any one of claims 1 to 3, wherein the calculation unit calculates a turning speed and a moving speed of the cart based on each detection information related to the front, rear, left, and right wheel tags. Transport work measurement system.   The tag reading unit reads or detects each tag by radio waves, and a radio wave reflector for securing a path of tag reading radio waves between the tag reading unit and the wheel tag or the determination wheel tag The carriage transportation work measuring system according to any one of claims 1 to 5, wherein the carriage is provided in the carriage.

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