JP5862327B2 - Traffic signal control device and traffic signal control method - Google Patents

Description

  The present invention relates to a traffic signal control device and a traffic signal control method, and more particularly to a traffic signal control device and a traffic signal control method in a traffic signal control system that controls lighting of a signal lamp unit based on traffic data.

  Conventionally, a traffic signal control system comprising a central device that generates a signal control parameter based on traffic data and a traffic signal control device (traffic signal controller) that controls lighting of a signal lamp based on the signal control parameter. Are known. The central unit is installed at the traffic control center and is connected to the traffic signal control unit installed at the intersection by a dedicated line. The traffic signal control device collects traffic data from the vehicle detector and transmits it to the central device, and receives signal control parameters sent from the central device.

  In recent years, in order to prevent the influence of disasters or equipment failures, for example, a plurality of traffic signal control devices are included, and each of the plurality of traffic signal control devices communicates with other traffic signal control devices. Transmission device, a router for controlling which traffic signal control device to transmit information based on the IP address of the signal sent via the transmission device, and the transmission device sent via the transmission device There is a traffic signal control system that includes a signal control unit that controls a signal lamp at an intersection based on a signal and performs network communication using Internet routing technology (for example, Patent Document 1).

Japanese Patent No. 3456170

  However, when the traffic data is transmitted and received, even if the traffic data telegram specifications (communication specifications) are the same between the vehicle detector and the traffic signal control device and between the traffic signal control device and the central device, the traffic to be stored Product specifications that determine the number, order, and location of data may vary. For example, when a plurality of traffic data is stored in different time slots and transmitted / received by serial transmission, traffic in the same measurement region is used between the vehicle detector and the traffic signal control device and between the traffic signal control device and the central device. There may be different time slots in which data is stored.

  In such a case, for example, the wiring of the cable inside the traffic signal control device is adjusted, and the traffic signal signal in the traffic signal control device is matched with the storage state of the traffic data between the traffic signal control device and the central device. The correspondence to generate is conceivable. However, according to such measures, there is a problem that the wiring of the cable becomes complicated and the work efficiency is lowered when the traffic signal control device is installed.

  The present invention has been made to solve the above-described problems, and an object thereof is to provide a traffic signal control device and a traffic signal control method that do not require complicated wiring.

(1) In order to solve the above-mentioned problem, a traffic signal control device according to an aspect of the present invention is a traffic signal control device for controlling lighting of a signal lamp unit based on traffic data, and a housing, A traffic data receiving unit for receiving the traffic data from a traffic data acquisition device for acquiring the traffic data in a predetermined area provided in the casing, and the traffic data in the predetermined area provided in the casing. The traffic signal is stored in a predetermined first time slot between the traffic data acquisition device and the traffic signal control device, and the control signal of the traffic signal control device is based on the traffic signal control device and the traffic data. When the traffic data is stored in a predetermined second time slot with other devices that generate the traffic, the traffic data receiving unit receives the traffic based on the setting information. A communication control unit for storing the traffic data stored in the first time slot, which is stored in the second time slot, and the second time slot provided in the housing, and provided in the housing. Receiving the control signal generated by the central transmission unit for transmitting the traffic data stored in the other device and the other device, and turning on the signal lamp based on the control signal. A signal control unit for controlling.

  Here, the setting information is input in advance by an administrator of the traffic signal control device or the like in order to adapt the traffic data to the storage state of the traffic data between the traffic signal control device and the central device.

  With such a configuration, the traffic data can be adapted to the storage state of the traffic data between the traffic signal control device and the central device without complicated wiring inside the traffic signal control device. It is possible to improve work efficiency at the time of installation or the like.

  In addition, traffic data is transferred between the traffic signal control device and the central device by increasing the number of vehicle detectors (traffic data acquisition devices) such as image-type vehicle detectors or ultrasonic vehicle detectors for acquiring traffic data. Even if it becomes necessary to change the time slot that should be assigned to the traffic data in order to adapt it to the data storage state, the traffic signal controller administrator etc. can easily cope with it by entering new setting information. Can do.

(2) Preferably, the said traffic data receiving part, the said communication control part, and the said center transmission part are each separate bodies.

  With this configuration, the traffic data receiving unit, communication control unit, or central transmission unit can be individually repaired, exchanged, or changed in settings.

(3) Preferably, the traffic signal control device further includes a first board on which the traffic data receiving unit is mounted, a second board on which the communication control unit is mounted, and the central transmission unit. The first substrate and the third substrate are formed on the second substrate.

  With such a configuration, the first board on which the traffic data receiving unit is mounted without wiring the board on which the traffic data receiving unit is mounted and the board on which the central transmission unit is mounted with a cable as in the prior art. Can be connected to the third board on which the central transmission unit is mounted via the second board, so that it is possible to improve aesthetics, achieve downsizing, or reduce costs.

(4) More preferably, the traffic signal control device further includes a first connector for connecting the first board and the second board, the second board, and the third board. And a second connector for connecting the two.

  With such a configuration, the first substrate and the second substrate, and the second substrate and the third substrate can be directly connected without performing wiring by a cable.

(5) In order to solve the above-described problem, a traffic signal control method according to an aspect of the present invention is a traffic signal control method in a traffic signal control device for controlling lighting of a signal lamp unit based on traffic data. Receiving the traffic data from a traffic data acquisition device that acquires the traffic data in a predetermined area, and the traffic data in the predetermined area is predetermined between the traffic data acquisition device and the traffic signal control device. A predetermined second time slot between the traffic signal control device and another device that generates a control signal of the traffic signal control device based on the traffic data. The traffic data stored in the first time slot based on setting information is stored in the second time slot. Storing the traffic data stored in the second time slot to the other device, receiving the control signal generated by the other device, and receiving the control signal. And controlling the lighting of the signal lamp device based on the above.

  With such a configuration, the traffic data can be adapted to the storage state of the traffic data between the traffic signal control device and the central device without complicated wiring inside the traffic signal control device. It is possible to improve work efficiency at the time of installation or the like.

  In addition, traffic data is transferred between the traffic signal control device and the central device by increasing the number of vehicle detectors (traffic data acquisition devices) such as image-type vehicle detectors or ultrasonic vehicle detectors for acquiring traffic data. Even if it becomes necessary to change the time slot that should be assigned to the traffic data in order to adapt it to the data storage state, the traffic signal controller administrator etc. can easily cope with it by entering new setting information. Can do.

  The traffic system radio apparatus and traffic signal control method according to the present invention do not require complicated wiring.

It is a figure explaining the traffic signal control system containing the traffic signal control apparatus which concerns on embodiment of this invention. It is a figure which shows an example of a structure of a traffic signal control apparatus as a comparative example of the traffic signal control apparatus which concerns on embodiment of this invention. (A) is a figure explaining the situation where the data which show the occupation rate of the road by the vehicle received by the traffic signal control apparatus shown in FIG. 2 are stored in the 1st time slot, (b) (A) is a figure explaining the condition where the data which show the occupation rate of the road by the vehicle shown in (a) are stored in the 2nd time slot. (A) is a figure explaining the situation where the data which show the presence or absence of the passage of the vehicle received by the traffic signal control apparatus shown in FIG. 2 are stored in the 1st time slot, (b) It is a figure explaining the condition where the data which show the presence or absence of the passage of the vehicle shown to (a) are stored in the 2nd time slot. It is a top view which shows the structure of the traffic signal control apparatus which concerns on embodiment of this invention. It is a front view which shows the structure of the traffic signal control apparatus which concerns on embodiment of this invention. (A) is a figure explaining the situation where the data which show the occupation rate of the road by the vehicle received by the traffic signal control apparatus which concerns on embodiment of this invention are stored in the 1st time slot, (B) is a figure explaining the situation where the data which show the occupation rate of the road by the vehicle shown to (a) are stored in the 2nd time slot. (A) is a figure explaining the situation where the data which show the presence or absence of the passage of the vehicle received by the traffic signal control apparatus which concerns on embodiment of this invention are stored in the 1st time slot, (b) is a figure explaining the situation where the data which show the presence or absence of the passage of the vehicle shown to (a) are stored in the 2nd time slot. It is a flowchart which shows the operation | movement procedure of the lighting control of the signal lamp device by the traffic signal control apparatus which concerns on embodiment of this invention.

[Configuration and basic operation]
Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals and description thereof will not be repeated.

(Configuration of traffic signal control system)
FIG. 1 is a diagram for explaining a traffic signal control system including a traffic signal control device 10 according to an embodiment of the present invention. Referring to FIG. 1, a traffic signal control system including a traffic signal control device 10 according to an embodiment of the present invention includes a traffic signal control device 10, an image type vehicle sensor 11, and an image type vehicle sensor 12. , An ultrasonic vehicle sensor 13, a radio signal transmitter 14, and a central device 15.

  The image-type vehicle sensor 11, the image-type vehicle sensor 12, and the ultrasonic vehicle sensor 13 are connected to the wireless signal transmitter 14 by wire. The image-type vehicle sensor 11 and the image-type vehicle sensor 12 acquire road images captured by the cameras 18 and 19 installed above the road, respectively, and based on the road image, the road occupancy rate of the vehicle or Traffic data indicating whether or not the vehicle is passing is acquired, and the traffic data is wired to the wireless signal transmitter 14.

  The ultrasonic vehicle detector 13 detects a vehicle that passes directly under the sensor 20 installed above the road using ultrasonic waves, and uses a radio signal transmitter as data indicating whether the vehicle is passing or not as traffic data. 14 to wire transmission.

  Further, the traffic data is not only data indicating the road occupancy rate of the vehicle or the presence or absence of the vehicle, but also the speed of the traveling vehicle calculated based on the data indicating the presence or absence of the vehicle, for example, the vehicle in the predetermined area May be the number of units. These traffic data are calculated by the image type vehicle sensor 11, the image type vehicle sensor 12, or the ultrasonic type vehicle sensor 13. For example, the wireless signal transmitter 14 is connected to the image type vehicle sensor 11. Alternatively, data indicating the presence or absence of traffic of the vehicle may be acquired from the image-type vehicle sensor 12 or the ultrasonic vehicle sensor 13, and the traffic data may be calculated by the wireless signal transmitter 14.

  When traffic data is transmitted from the image-type vehicle sensor 11, the image-type vehicle sensor 12, or the ultrasonic vehicle sensor 13, the wireless signal transmitter 14 divides the traffic data into 1 The data is stored in a predetermined first time slot among time slots divided by smaller time intervals in the frame.

  Specifically, the radio signal transmitter 14 stores traffic data in a time slot corresponding to the transmission source. For example, the wireless signal transmitter 14 sets the time slot A as the first time slot for the road occupation ratio (hereinafter referred to as “traffic data 1”) by the vehicle transmitted from the image-type vehicle sensor 11. assign. Further, the radio signal transmitter 14 sets the time slot B as the first time slot with respect to the road occupation ratio (hereinafter referred to as “traffic data 2”) by the vehicle transmitted from the image type vehicle sensor 12. assign.

  In addition, the wireless signal transmitter 14 performs time as a first time slot with respect to data (hereinafter referred to as “traffic data 3”) indicating the presence or absence of traffic of the vehicle transmitted from the ultrasonic vehicle detector 13. Assign slot C. In this way, the wireless signal transmitter 14 generates a serial signal of traffic data.

  Such a first time slot is used when the traffic signal control device 10 is installed or when the image-type vehicle sensor 11, the image-type vehicle sensor 12 or the ultrasonic vehicle sensor 13 is installed. Is predetermined.

  Note that the wireless signal transmitter 14 receives, for example, the traffic data 1 from the image-type vehicle sensor 11 as well as information including not only the road occupancy rate of the vehicle but also the speed of the traveling vehicle or the number of vehicles in a predetermined area. Similarly, the time slot A is assigned to the data as the first time slot.

  In addition, for example, the wireless signal transmitter 14 acquires data indicating the presence or absence of traffic of the vehicle from the image-type vehicle sensor 11, and based on this data, the road occupancy rate, the speed of the traveling vehicle, or the vehicle in a predetermined area Similarly, when the traffic data 1 such as the number of traffics is calculated, the time slot A can be assigned to the calculated traffic data 1 as the first time slot.

  Further, the process of assigning the first time slot to the traffic data is not necessarily performed by the radio signal transmitter 14. For example, the radio signal transmitter 14 transmits one or a plurality of traffic data to the traffic signal control device 10. The traffic signal controller 10 may perform a process of assigning the first time slot to the traffic data.

  The wireless signal transmitter 14 is a wireless signal including traffic data to which the first time slot is assigned, that is, a serial signal of traffic data, which is data indicating the occupation ratio of the road by the vehicle, and data indicating the presence or absence of traffic of the vehicle. Is transmitted from the external antenna 17 of the wireless signal transmitter 14 to the external antenna 21 of the traffic signal control device 10.

  The traffic signal device includes a signal lamp 16 and a traffic signal control device 10 that controls lighting of the signal lamp 16. The traffic signal control device 10 receives a radio signal including traffic data transmitted from the radio signal transmitter 14 by an external antenna 21 provided above the road. In addition, the traffic signal control device 10 transmits the traffic data received from the radio signal transmitter 14 to the central device 15 of the traffic control center.

  Here, when the image-type vehicle detectors 11 and 12 or the ultrasonic vehicle detector 13 are collectively referred to as a vehicle detector (traffic data acquisition device), the vehicle signal detector-traffic signal control device 10 and the traffic signal control device. Although the telegram specifications (communication specifications) of the traffic data are the same between the 10 and the central device 15, the product specifications that determine the number, order, and position of the traffic data to be stored may differ. That is, the traffic data in the same measurement area is stored in the first time slot between the vehicle detector and the traffic signal control device 10, whereas between the traffic signal control device 10 and the central device 15. The specification may be stored in the second time slot.

  For example, between the vehicle detector and the traffic signal control device 10, traffic data 1 in the measurement region R1 of the image type vehicle sensor 11 is stored in the time slot A as the first time slot, and the image type vehicle sensor 12 measures. While the traffic data 2 in the region R2 is stored in the time slot B as the first time slot, the traffic data 1 is stored in the second time slot between the traffic signal control device 10 and the central device 15. And the traffic data 2 is stored in the time slot C as the second time slot.

  In such a case, the traffic signal control device 10 conforms to the specification that defines the storage state of the traffic data between the traffic signal control device 10 and the central device 15 for the traffic data received from the vehicle detector via the wireless signal device 14. As described above, it is stored in a predetermined second time slot. Then, the traffic signal control device 10 transmits the traffic data stored in the second time slot to the central device 15.

  Central device 15 is connected to traffic signal control device 10 through a dedicated line, and determines signal control parameters based on traffic data received from traffic signal control device 10. In addition, the central device 15 outputs the determined signal control parameter to the traffic signal control device 10.

  The traffic signal control device 10 that has received the signal control parameter from the central device 15 controls the lighting of the signal lamp 16 based on this signal control parameter.

  The specification that defines the storage state of the wireless signal traffic data between the vehicle detector and the traffic signal control device 10 and the specification that defines the storage state of the wireless signal traffic data between the traffic signal control device 10 and the central device 15. In some cases, the first time slot and the second time slot are the same. Further, the second time slot is determined in advance when the central apparatus 15 is installed.

  In addition, the wireless communication performed between the traffic signal control device 10 and the wireless signal transmitter 14 uses a 2.4 GHz band that is an ISM band (Industrial Scientific Medical Band), that is, 2.4000 to 2.4835 GHz. The communication frequency channel uses the same frequency band as the frequency for the wireless LAN device based on IEEE802.11a / b / g.

(Comparison example of traffic signal control device)
Here, a traffic signal control device 50 will be described as a comparative example of the traffic signal control device 10. FIG. 2 is a diagram illustrating an example of a configuration of a traffic signal control device 50 as a comparative example of the traffic signal control device 10. FIG. 3A is a diagram for explaining a situation in which data indicating the road occupancy rate by the vehicle received by the traffic signal control device 50 shown in FIG. 2 is stored in the first time slot. FIG. 3B is a diagram for explaining a situation in which data indicating the road occupancy rate by the vehicle shown in FIG. 3A is stored in the second time slot.

  FIG. 4A is a diagram for explaining a situation in which data indicating the presence / absence of traffic of the vehicle received by the traffic signal control device 50 shown in FIG. 2 is stored in the first time slot. FIG. 4B is a diagram for explaining a situation in which data indicating the presence or absence of traffic of the vehicle shown in FIG. 4A is stored in the second time slot.

  Referring to FIG. 2, traffic signal control device 50 includes an external antenna 51, a casing 52, a wireless reception unit 53, and a wireless transmission unit 54. The casing 52 stores therein a wireless reception unit 53 and a wireless transmission unit 54. The wireless reception unit 53 and the wireless transmission unit 54 are mounted on different substrates, and are connected by wiring the connectors provided on these two substrates with cables.

  The wireless reception unit 53 includes a wireless module 61, a control unit 62, and a terminal block 63. The wireless module 61 receives a wireless signal of traffic data stored in the first time slot from the wireless signal transmitter 14 via the external antenna 51.

  The radio module 61 multiplies the radio signal and the local signal, for example, to orthogonally demodulate the radio signal including traffic data and convert it to a baseband signal. Then, the wireless module 61 outputs the converted traffic data to the control unit 62. The control unit 62 receives traffic data from the wireless module 61 and outputs the traffic data from the connectors A1 to D1 or A2 to D2 of the corresponding terminal block 63.

  For example, as shown in FIG. 3A, the radio signal received by the control unit 62 is measured by the traffic data 1 and the measurement of the image type vehicle sensor 12 in the measurement region R1 (see FIG. 1) of the image type vehicle sensor 11. It is a serial signal of traffic data, which is data indicating the occupation rate of roads by vehicles including traffic data 2 in region R2 (see FIG. 1), traffic data 1 is stored in time slot A, and traffic data 2 is a time slot. Assume that it is stored in B. One frame is divided into time slots A to D.

  Further, the data stored in the time slot A is output from the connector A1, the data stored in the time slot B is output from the connector B1, the data stored in the time slot C is output from the connector C1, and the data is output from the connector D1. It is assumed that data stored in the time slot D is output.

  In such a case, the control unit 62 outputs the traffic data 1 stored in the time slot A from the connector A1 to the wireless transmission unit 54, and the traffic data 2 stored in the time slot B from the connector B1 to the wireless transmission unit 54. Output to.

  Further, for example, as shown in FIG. 4A, the radio signal received by the control unit 62 indicates the passage of the vehicle including the traffic data 3 in the measurement region R3 (see FIG. 1) of the ultrasonic vehicle detector 13. It is assumed that the traffic data is a serial signal of traffic data, and the traffic data 3 is stored in the time slot C.

  Further, data stored in time slot A is output from connector A2, data stored in time slot B is output from connector B2, data stored in time slot C is output from connector C2, and data is stored from connector D2. It is assumed that data stored in the time slot D is output.

  In such a case, the control unit 62 outputs the traffic data 3 stored in the time slot C from the connector C2 to the wireless transmission unit 54.

  The wireless transmission unit 54 includes a terminal block 64, a communication control unit 65, a modem 66, and a signal control unit 67. The terminal block 64 has connectors A3 to D3 and connectors A4 to D4.

  In the wireless transmission unit 54, the data output from the connector A3 is stored in the time slot A by the communication control unit 65, the data output from the connector B3 is stored in the time slot B, and the data output from the connector C3 is Data stored in the time slot C and output from the connector D3 is stored in the time slot D.

  Data output from the connector A4 is stored in the time slot A, data output from the connector B4 is stored in the time slot B, data output from the connector C4 is stored in the time slot C, and from the connector D4. The output data is stored in the time slot D.

  Here, the vehicle detector-traffic signal control device 50 and the traffic signal control device 50-central device 15 have different specifications that determine the number, order, and position of traffic data to be stored. Between the traffic signal control device 50, the traffic data 1 is stored in the time slot A and the traffic data 2 is stored in the time slot B, whereas between the traffic signal control device 50 and the central device 15, It is assumed that the traffic data 1 is stored in the time slot B and the traffic data 2 is stored in the time slot C.

  In addition, the traffic data 3 is stored in the time slot C between the vehicle detector and the traffic signal control device 50, whereas the traffic data 3 is between the traffic signal control device 50 and the central device 15. It is assumed that the specification is stored in time slot B.

  In such a case, as shown in FIG. 2, FIG. 3B and FIG. 4B, the connector A1 and the connector B3 are connected, the connector B1 and the connector C3 are connected, and the connector C2 and the connector B4 are connected. , The traffic data transmitted from the wireless transmission unit 54 to the central device 15 is adjusted so as to conform to the specifications that define the storage state of the traffic data between the traffic signal control device 50 and the central device 15.

  And the communication control part 65 receives traffic data via each connector of the terminal block 64, converts the said traffic data into a serial signal, and outputs the converted traffic data to the modem 66. FIG. The modem 66, for example, quadrature-modulates the baseband signal by multiplying the baseband signal, which is traffic data received from the communication control unit 65, and the oscillation signal, and sends the modulated signal to the central device 15. Send.

  Thus, according to the traffic signal control device 50 which is a comparative example of the traffic signal control device 10 according to the present invention, when the traffic data is transmitted and received between the traffic signal control device 50 and the central device 15, the vehicle When the specifications that determine the storage state of traffic data differ between the sensor and the traffic signal control device 50 and between the traffic signal control device 50 and the central device 15, the connectors inside the traffic signal control device 50 are connected to each other. It was supported by adjusting the cable wiring. For this reason, there has been a problem that the wiring between the connectors becomes complicated. On the other hand, the traffic signal control apparatus 10 according to the present invention is configured as follows.

(Configuration of Traffic Signal Control Device of the Present Invention)
FIG. 5 is a plan view showing the configuration of the traffic signal control device 10 according to the embodiment of the present invention, and FIG. 6 is a front view showing the configuration of the traffic signal control device 10 according to the embodiment of the present invention. is there.

  5 and 6, in addition to the external antenna 21, the signal control device 10 further includes a housing 22, a radio module 23 (traffic data receiving unit), a communication control unit 24, and a modem 25 ( A central transmission unit), a signal control unit 26, a connector 27, a connector 28, and a connector 29.

  The external antenna 21 receives a radio signal including traffic data from the radio signal transmitter 14. The housing 22 stores a wireless module 23, a communication control unit 24, a modem 25, a signal control unit 26, a connector 27, a connector 28, and a connector 29. The signal control unit 26 may be provided outside the housing 22.

  The wireless module 23 is mounted on the first substrate. The radio module 23 orthogonally demodulates a radio signal including traffic data received from the radio signal transmitter 14 via the external antenna 21 by, for example, multiplying the radio signal and a local signal, thereby generating a baseband Convert to a signal. Further, the wireless module 23 outputs the converted traffic data to the communication control unit 24.

  The communication control unit 24 is mounted on the second board, and the first board on which the wireless module 23 is mounted and the second board on which the communication control unit 24 is mounted connect the first connector 27. Are connected through. The communication control unit 24 stores the traffic data received from the wireless module 23 in the second time slot based on the setting information.

  The setting information is input in advance by an administrator of the traffic signal control device 10 and is recorded in the communication control unit 24. The communication control unit 24 refers to the recorded setting information and stores the traffic data stored in the first time slot in the second time slot.

  FIG. 7A is a diagram for explaining a situation in which data indicating the road occupancy rate by the vehicle received by the traffic signal control apparatus 10 according to the embodiment of the present invention is stored in the first time slot. FIG. 7B is a diagram for explaining a situation in which data indicating the road occupancy rate by the vehicle shown in FIG. 7A is stored in the second time slot. FIG. 8A illustrates a situation in which data indicating the presence / absence of vehicle traffic received by the traffic signal control apparatus 10 according to the embodiment of the present invention is stored in the first time slot. FIG. 8B is a diagram for explaining a situation in which data indicating whether or not the vehicle is shown in FIG. 8A is stored in the second time slot.

  For example, as shown in FIG. 7A, the radio signal received by the communication control unit 24 is the traffic data 1 in the measurement region R <b> 1 (see FIG. 1) of the image type vehicle sensor 11 and the image type vehicle sensor 12. It is a serial signal of traffic data which is data indicating the occupation rate of the road by the vehicle including the traffic data 2 in the measurement region R2 (see FIG. 1), the traffic data 1 is stored in the time slot A, and the traffic data 2 Is stored in time slot B.

  In such a situation, the specification that determines the storage state of the traffic data differs between the vehicle detector and the traffic signal control device 10 and between the traffic signal control device 10 and the central device 15, so that the vehicle detector and the traffic signal control. Between the devices 10, the traffic data 1 is stored in the time slot A and the traffic data 2 is stored in the time slot B, whereas between the traffic signal control device 10 and the central device 15, the traffic data 1 is stored in the time slot A. It is assumed that the traffic data 1 is stored in the time slot B and the traffic data 2 is stored in the time slot C.

  In such a case, the administrator or the like stores the traffic data 1 stored in the time slot A as the first time slot, stores the traffic data 1 in the time slot B as the second time slot, and sets the time slot as the first time slot. Setting information for instructing the traffic data 2 stored in B to be stored in the time slot C as the second time slot is recorded in the program in advance.

  Then, the communication control unit 24 stores the traffic data 1 in the time slot B and the traffic data 2 in the time slot C based on the setting information, as shown in FIG.

  Further, for example, as shown in FIG. 8A, the vehicle traffic includes the traffic data 3 in the radio signal received by the communication control unit 24 in the measurement region R3 (see FIG. 1) of the ultrasonic vehicle detector 13. It is assumed that traffic data 3 is stored in the time slot C.

  In such a situation, the specification that determines the storage state of the traffic data differs between the vehicle detector and the traffic signal control device 10 and between the traffic signal control device 10 and the central device 15, so that the vehicle detector and the traffic signal control. In the device 10, the traffic data 3 is stored in the time slot C. On the other hand, the traffic data 3 is stored in the time slot B between the traffic signal control device 10 and the central device 15. Suppose there is.

  In such a case, the administrator or the like pre-programs the setting information instructing to store the traffic data 3 stored in the time slot C as the first time slot and the time slot B as the second time slot. To record.

  And the communication control part 24 stores the traffic data 3 in the time slot B based on setting information, as shown in FIG.8 (b).

  Further, the communication control unit 24 outputs the traffic data stored in the second time slot to the modem 25 via the connector 28.

  The modem 25 is mounted on the third board, and the second board on which the communication control unit 24 is mounted and the third board on which the modem 25 is mounted are connected via the second connector 28. doing. The modem 25, for example, multiplies the baseband signal, which is traffic data received from the communication control unit 24, and the oscillation signal to quadrature-modulate the baseband signal, and sends the modulated signal to the central device 15. Wired transmission.

  The central device 15 determines a signal control parameter for controlling lighting of the signal lamp 16 based on the traffic data transmitted from the communication control unit 24 of the traffic signal control device 10. Further, the central device 15 transmits the determined signal control parameter to the traffic signal control device 10.

  The signal control unit 26 is connected to a second board on which the communication control unit 24 is mounted via a connector 29. The signal control unit 26 is connected to the central device 15 through a dedicated line, and receives the signal control parameters transmitted by the central device 15. Then, the signal control unit 26 controls the lighting of the signal lamp 16 based on the signal control parameter received from the central device 15.

[Operation]
Next, the operation of lighting control of the traffic light signal lamp 16 by the traffic signal control device 10 according to the embodiment of the present invention will be described. FIG. 9 is a flowchart showing an operation procedure of the lighting control of the signal lamp device 16 by the traffic signal control device 10 according to the embodiment of the present invention.

  The traffic signal control device 10 reads out a program including each step of the flowchart from a memory (not shown) and executes the program. This program can be installed externally. The installed program is distributed in a state stored in a recording medium, for example.

  Referring to FIG. 9, first, the image type vehicle sensor 11, the image type vehicle sensor 12 and the ultrasonic vehicle sensor 13 obtain traffic data and transmit it to the wireless signal transmitter 14. The wireless signal transmitter 14 stores the traffic data 1 to 3 received from the image type vehicle sensor 11, the image type vehicle sensor 12 and the ultrasonic type vehicle sensor 13 in the first time slot, respectively. A radio signal including traffic data is transmitted from the external antenna 17 to the traffic signal control device 10 (step S1).

  Next, the external antenna 21 of the traffic signal control apparatus 10 receives a radio signal including traffic data, and the radio module 23 receives the radio signal via the external antenna 21 (step S2). The wireless module 23 then orthogonally demodulates the wireless signal and outputs the demodulated traffic data to the communication control unit 24 via the connector 27.

  Next, the communication control unit 24 refers to the recorded setting information, and based on the setting information, the traffic data stored in the first time slot received from the wireless module 23 is stored in the second time slot. Store (step S3). Then, the communication control unit 24 outputs the traffic data stored in the second time slot to the modem 25 via the connector 28.

  Next, the modem 25 orthogonally modulates the traffic data received from the communication control unit 24, and transmits the modulated signal to the central device 15 (step S4).

  Next, the central device 15 receives a signal including traffic data from the modem 25 of the traffic signal control device 10, determines a signal control parameter based on the traffic data, and uses the determined signal control parameter as the traffic signal control device 10. The signal control unit 26 of the traffic signal control device 10 receives the signal control parameter from the central device 15 (step S5).

  Next, the signal control unit 26 controls the lighting of the signal lamp 16 based on the signal control parameter received from the central device 15 (step S6).

  By the way, even if the telegram specifications (communication specifications) of the traffic data are the same between the vehicle detector and the traffic signal control device 10 and between the traffic signal control device 10 and the central device 15, the number and order of the traffic data to be stored. And product specifications that define the location may differ. For example, when a plurality of traffic data is stored in different time slots and transmitted / received by serial transmission, the same measurement is performed between the vehicle detector and the traffic signal control device 10 and between the traffic signal control device 10 and the central device 15. There may be different time slots for storing traffic data in the region.

  In such a case, for example, the cable wiring in the traffic signal control device 10 is adjusted, and the traffic signal control device 10 matches the traffic data storage state between the traffic signal control device 10 and the central device 15. A countermeasure for generating a data signal is conceivable. However, according to such measures, there is a problem that the wiring of the cable becomes complicated and the work efficiency at the time of installation of the traffic signal control device 10 is reduced.

  On the other hand, in the traffic signal control apparatus 10 according to the embodiment of the present invention, the wireless module 23 is provided in the housing 22 and receives traffic data from the vehicle detector. The communication control unit 24 is provided in the housing 22, traffic data in a predetermined area is stored in the first time slot between the vehicle detector and the traffic signal control device 10, and the traffic signal control device. When the data is stored in the second time slot between 10 and the central device 15, the traffic data stored in the first time slot received by the wireless module 23 based on the setting information is stored in the second time slot. Store. The modem 25 is provided in the housing 22 and transmits the traffic data stored in the second time slot to the central device 15 by the communication control unit 24. Moreover, the signal control part 26 receives the control signal produced | generated by the central apparatus 15, and controls lighting of a signal lamp device based on a control signal.

  With such a configuration, the traffic data can be adapted to the traffic data storage state between the traffic signal control device 10 and the central device 15 without providing complicated wiring inside the traffic signal control device 10. The work efficiency can be improved when the control device 10 is installed.

  Further, traffic data is transferred between the traffic signal control device 10 and the central device 15 by increasing the number of vehicle detectors such as the image-type vehicle detectors 11 and 12 or the ultrasonic vehicle detector 13 for acquiring traffic data. Even if it becomes necessary to change the time slot to be assigned to the traffic data in order to adapt to the data storage state, the administrator of the traffic signal control device 10 can easily cope with it by newly entering setting information. be able to.

  In addition, the wireless module 23, the communication control unit 24, and the modem 25 are separate bodies.

  With such a configuration, the wireless module 23, the communication control unit 24, or the modem 25 can be individually repaired, replaced, or changed in settings.

  Further, the traffic signal control apparatus 10 further includes a first board on which the wireless module 23 is mounted, a second board on which the communication control unit 24 is mounted, and a third board on which the modem 25 is mounted. The first substrate and the third substrate are formed on the second substrate.

  With such a configuration, the first board on which the wireless module 23 is mounted and the modem 25 can be provided without wiring the board on which the wireless module 61 is mounted and the board on which the modem 66 is mounted with a cable as in the prior art. Can be connected to the third substrate on which is mounted via the second substrate, so that it is possible to improve aesthetics, achieve downsizing, or reduce costs.

  The traffic signal control apparatus 10 further includes a connector 27 for connecting the first board and the second board, and a connector 28 for connecting the second board and the third board. .

  With such a configuration, the first substrate and the second substrate, and the second substrate and the third substrate can be directly connected without wiring.

  The above embodiment should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

DESCRIPTION OF SYMBOLS 10 Traffic signal control apparatus 11 Image-type vehicle detector 12 Image-type vehicle detector 13 Ultrasonic-type vehicle sensor 14 Radio signal transmitter 15 Central apparatus 16 Signal lamp 17 External antenna 18 Camera 19 Camera 20 Sensor 21 External antenna 22 Case 23 Wireless module (Traffic data receiver)
24 Communication Control Unit 25 Modem (Central Transmission Unit)
26 Signal control unit 27 Connector (first connector)
28 connector (second connector)
29 Connector 50 Traffic signal control device 51 External antenna 52 Case 53 Wireless receiver 54 Wireless transmitter 61 Wireless module (traffic data receiver)
62 Control Unit 63 Terminal Block 64 Terminal Block 65 Communication Control Unit 66 Modem (Central Transmission Unit)

Claims (4)

A traffic signal control device for controlling lighting of a signal lamp based on traffic data,
A housing,
A traffic data receiving unit for receiving the traffic data from a traffic data acquiring device provided in the housing and acquiring the traffic data in a predetermined area;
The traffic data provided in the housing is stored in a predetermined first time slot between the traffic data acquisition device and the traffic signal control device, and the traffic signal control device And the traffic data receiving unit based on setting information when stored in a predetermined second time slot between the traffic signal and another device that generates a control signal of the traffic signal control device based on the traffic data A communication control unit for storing the traffic data stored in the first time slot received by the second time slot;
A central transmission unit for transmitting the traffic data provided in the housing and stored in the second time slot by the communication control unit to the other device;
The other receiving said control signal generated by the device, e Bei and said control signal signal controller for controlling the lighting of the signal lamp device based on,
The traffic signal control device further includes:
A first board on which the traffic data receiver is mounted;
A second board on which the communication control unit is mounted;
A third board on which the central transmitter is mounted;
The traffic signal control device , wherein the first substrate and the third substrate are formed on the second substrate .   The traffic signal control device according to claim 1, wherein the traffic data receiving unit, the communication control unit, and the central transmission unit are separate bodies. The traffic signal control device further includes:
A first connector for connecting the first board and the second board;
The traffic signal control device according to claim 1 or 2, comprising a second connector for connecting the second board and the third board. A traffic signal control method in a traffic signal control device for controlling lighting of a signal lamp device based on traffic data,
The traffic signal control device includes a housing, a traffic data receiving unit, a communication control unit, a central transmission unit, and a first board on which the traffic data receiving unit is mounted, provided in the housing, A second board on which the communication control unit is mounted; and a third board on which the central transmission unit is mounted. The first board and the third board are on the second board. Formed,
The traffic data receiving unit receiving the traffic data from a traffic data acquiring device for acquiring the traffic data in a predetermined area;
The communication control unit stores the traffic data in the predetermined area in a predetermined first time slot between the traffic data acquisition device and the traffic signal control device, and the traffic signal control device. The first time slot based on setting information when stored in a predetermined second time slot with another device that generates a control signal of the traffic signal control device based on the traffic data Storing the traffic data stored in the second time slot;
The central transmission unit transmitting the traffic data stored in the second time slot to the other device;
Receiving the control signal generated by the other device and controlling lighting of the signal lamp unit based on the control signal.

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