JPS6061897A - Speed regulation mark display - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a variable speed limit sign display device installed on expressways and the like, in which the speed limit can be changed from a central command unit.

Prior Art and Problems Variable speed regulation signs installed on roads are comprised of a speed regulation display board that displays the regulation speed and an auxiliary board that displays the regulation range. There are two types of variable speed display signs: an intermediate display placed in the middle of a certain speed limit section and a boundary rock placed at both ends of the section, and the display on the auxiliary board of the border gate is also variable. The display on this variable auxiliary board needs to be determined from the speed limit displayed by the sign and the speed limit behind it, so a communication cable is laid between the terminals to transmit data on the speed limit and commands are given from the center. The display on the variable auxiliary board is determined based on the displayed display speed. FIG. 1 is a diagram showing speed regulation signs for such an intermediate machine and a boundary machine, and FIG. 2 is a block diagram showing a matching circuit and a central control unit of the boundary machine.

In these figures, the solid device is equipped with a control panel 1 operated by an attendant and a monitoring control device 2, and the speed restriction information is transmitted via a line 3 to a speed restriction sign at the boundary installed on the road. . Figure 1 is a diagram showing such signs, and shows the line 3 that transmits command signals from the central control unit to each sign.
is connected, and the regulation display board 4 that displays its speed and its sign are intermediate machines, the fixed auxiliary board 5. In the case of a boundary machine, a variable auxiliary plate 6 is provided. The speed restriction sign display device of the boundary machine is provided with a central command receiving section 7 that receives commands from the center, and a matching receiving section 9 that receives speed information given via a matching line 8 from an adjacent speed regulating sign. It will be done. The reception of the signal at the match receiving unit 9 is, for example, not shown in FIG. is predetermined to be 50 Km/h, and based on these signals, the matching receiving section 9 provides outputs Tl and T2 to the auxiliary board display determining circuit 10 based on those inputs. The central command receiving section 7 receives the speed regulation signal from the central operation panel 1 and similarly provides it to the auxiliary board display determination circuit 10. For example, when output S1 is given, the regulation speed is 80 km/h. h
, when the output S2 is given, the speed is determined to be 50 km/l+. If the regulated speed from the adjacent regulation sign does not match the commanded speed from the center, the auxiliary board display determination circuit 10 outputs a discrepancy output P1, and lights up one of the arrows of the variable auxiliaries 4 & 6 shown in FIG. The new speed limit will be controlled from that point onwards, and a start display will be displayed indicating that the new speed limit will apply from that point onwards. On the other hand, if the speed limit displayed on the adjacent intermediate machine matches the speed limit instructed from the center, the auxiliary board display determination circuit 10 outputs a match output P2, lights up both arrows on the variable auxiliary board 6, and displays the same speed. The area is displayed to indicate that the speed limit will continue as it is. FIG. 3 is a diagram showing a truth value table of display contents of the speed display of an adjacent regulation display board, the speed display of the regulation board, and its auxiliary display.

As shown in this figure, if the display content of the intermediate machine does not match the restricted speed for the boundary machine (No, 1.2), it is displayed as a start display, and if it matches (No, 3.4), the variable auxiliary board 6 is displayed as a section.

However, this method has a problem in that there are restrictions on the content of the restricted speed that is instructed to be displayed, and it is not possible to deal with various speeds. For example, even when the display speed of the intermediate regulation display board is set to 70 km/h as shown in FIG.
1 is given, so it is the same as the case of No. 2.3 in Fig. 3. Therefore, as in the case of No. 093, the auxiliary board display determination circuit 10 outputs a section display if the command from the center is 80 km/h. I will do it. However, since the display content on the intermediate plane is 70km/h, it is necessary to display a new speed limit of 80km/h from this restriction display board. Conventional speed regulation sign display devices cannot make such settings and have the problem of not being able to display correctly.

Purpose of the Invention The present invention has been made in view of the problems of conventional speed regulation sign display, and provides a speed regulation sign that can correctly display the variable auxiliary board in response to various speeds. The present invention provides a display device.

Structure and Effects of the Invention The present invention comprises a central command receiving section that receives a speed setting signal from the center and outputs speed information, and a matching receiving section that receives displayed speed data from an adjacent speed regulation sign and outputs speed information. A speed regulation sign display device that displays a set speed given from the center and drives an auxiliary sign indicating a speed restriction section based on the received output, the speed regulation sign display device having a speed limit that may be regulated from the center. a plurality of first speed setter groups in which data is tentatively set; and a first gate circuit that selects a set speed of one of the first speed setter groups based on the output of a central command receiving section; A plurality of second speed setter groups in which speed data that may be transmitted from adjacent speed limit signs are preset are compared with the set speed of any one of the second speed setter groups and outputted from the receiving section. a second gate circuit selected based on the first. The present invention is characterized by comprising a display determining circuit which determines the display of the auxiliary sign by comparing the outputs of the second gate circuit, and -1.

According to the present invention having such features, the speed data that may be regulated from the center and the speed data that may be regulated by adjacent speed regulation signs are set in advance by respective setting devices, and the signal is selected based on the data from the actual receiving section and given to the display determining circuit, so it is possible to display the section only if the speeds match, and if they do not match, the configuration is configured to display the start display. can do. Therefore, it is no longer necessary to display the section display even though the speed limits do not match, and it is possible to display the correct speed, thereby eliminating confusion for the driver.

DESCRIPTION OF THE EMBODIMENT FIG. 5 is a block diagram showing an embodiment of the speed regulation sign display device according to the present invention. In this figure, the same parts as in the conventional example shown in FIG. 2 are given the same reference numerals. Now, the operation panel 1, which is the central control device. A speed command signal given from the supervisory control device 2 is given to the central command receiving section 7 via the line 3. Output signals SL and 32 from the central command receiving section 7 are respectively given to gate circuits 11 and 12 as gate opening signals. The gate circuits 11 and 12 each have a speed setter 13.
14 are connected. The speed setting devices 13 and 14 are composed of, for example, 4-bit dip switches, etc., and are used to preset the speed that may be regulated by the central control device. If there are two types of speed setting device 13, 80 km/b and 50 km/h, 4-bit data (1000) indicating 8 is set in one speed setting device 13, and the other speed setting device 1
It is assumed that 4-bit data (0101) indicating 5 is set in 4. Further, the speed signal given from the speed regulation sign of the intermediate machine is given to the match receiving section 9 via the match line 8. The outputs Tl and T2 of the match receiving section 9 are respectively given to gate circuits 15 and 16 as gate open signals.

The gate circuits 15 and 16 each have a speed setting device 13. A speed setter 17, 18 similar to j4 is connected. The speed setters 17, 18 are each set to different speeds which may be regulated by adjacent intermediate machines. For example, if the regulated speeds are 70 km/h and 50 km/h, 7 is displayed on the speed setter 17 (0111).

It is assumed that (0101) indicating 5 is stored in the speed setter 18. The outputs of gate circuits 11, 12 and 15, 16 are given to auxiliary board display determining circuit 19. ? ili
The Sukezaka display determining circuit 19 checks whether these outputs match, and if they match, displays the section,
If there is a mismatch, control is performed so that a display indicating the start of the restricted speed is displayed on the variable auxiliary plate 6.

FIG. 6 is a diagram showing a truth value table of the speed regulation sign display device of this embodiment. As shown in No. 2.3 of this figure, when the display content of the adjacent intermediate machine is 70 Km/b, the output T1 of the matching receiver 9 is given to the gate circuit 15 as a gate opening signal, and the speed setting device The data (0111) set by 17 is the auxiliary board display determination circuit 19.
is transmitted to the input terminals B1 to B4 of. If the setting of the intermediary machine is 50Rm/h (No. 1.4), the output T
2, the data 1-circuit 16 is opened and the speed setter 18 is opened.
The setting data (0111) is transmitted to the auxiliary board display determination circuit 19. On the other hand, as in the case of No. 1.3, the speed limit given from the center via line 3 is 80 km/h.
, the output S1 is given to the gate circuit 11, and the data (1000) of the speed setter 13 is given to the gate circuit 1.
1 to the input terminals A1 to A of the auxiliary board display determination circuit 19.
given to 4. Assuming that the regulated speed from the center is 50 km/h as in No. 2.4, data 1 to circuit 12 are opened by the output S2, and the setting data (1010) of the speed setting device 14 is set to the gate circuit 12. The signals are applied to input terminals A1 to A4 of the auxiliary board display determining circuit 19 via the auxiliary board display determining circuit 19.

The auxiliary board display determination circuit 19 selects the No.
, 4, the output P2 is output to display the section, and in the case of mismatch No. 1 to 3, the output P1 is output and the start display is displayed on the variable auxiliary board 6.

In this way, the display on the variable display board 6 can always be displayed correctly.

[Brief explanation of the drawing]

Fig. 1 is a diagram showing the appearance of a speed regulation sign, Fig. 2 is a block diagram showing the configuration of a conventional speed regulation sign display device, Figs. 3 and 4 are diagrams showing its truth value table, and Fig. 5 6 is a block diagram showing one embodiment of the speed regulation sign display device according to the present invention, and FIG. 6 is a diagram showing a truth value table of its operation. 4----------Restriction display board 5-------Fixed auxiliary board 6--=-Variable auxiliary board 7--------Central command receiving section 8--Butting line 9----- ---1 matching receiving section 10-1 auxiliary board display determining circuit 11,12. ．． 1
5.16------Gate circuit 13, 14, 17
．． 18-・-1.Speed setting device 19-・-Auxiliary board display determination circuit Patent applicant Tateishi Electric Co., Ltd. Agent Patent attorney Kanki Okamoto (1 person) Figure 1 Figure 2 Figure 3 Figure 4

Claims (1)

[Claims] (1) It has a central command receiving section that receives a speed setting signal from the center and outputs speed information, and a matching receiving section that receives displayed speed data from an adjacent speed regulation sign and outputs speed information, In a speed restriction sign display device that displays a set speed given from the center and drives an auxiliary sign indicating a speed restriction section based on these received outputs, a plurality of preset speed data that may be regulated from the center is used. a first speed setting device group, a first gate circuit that selects a set speed of any one of the first speed setting device group based on the output of the central command receiving section, and a first speed setting device group from an adjacent speed regulation sign. a plurality of second speed setter groups in which speed data that may be transmitted is set in advance; and selecting a set speed of one of the second speed setter groups based on the output of the matching receiver. a second gate circuit; and the first gate circuit. A speed regulation sign display device comprising: a display determining circuit that compares outputs of a second gate circuit and determines display of the auxiliary sign.