CN206639004U - A kind of on-off control device - Google Patents
A kind of on-off control device Download PDFInfo
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- CN206639004U CN206639004U CN201720365841.1U CN201720365841U CN206639004U CN 206639004 U CN206639004 U CN 206639004U CN 201720365841 U CN201720365841 U CN 201720365841U CN 206639004 U CN206639004 U CN 206639004U
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Abstract
The utility model discloses a kind of on-off control device, including photoelectrical coupler and switching tube；First connection pole of photoelectrical coupler input side is connected to single-chip microcomputer by first resistor, second connection pole of input side is connected to the first dc source, first connection pole of outlet side is connected to the second dc source by second resistance, and the second connection pole of outlet side is grounded by 3rd resistor；The control pole of switching tube is connected pole connection with the second of the photoelectrical coupler outlet side, and the first connection pole of switching tube is connected to slowdown monitoring circuit to be checked, the second connection pole ground connection of switch；Single-chip microcomputer controls being switched on or switched off for the slowdown monitoring circuit to be checked by output pwm signal.The break-make of slowdown monitoring circuit to be checked is controlled using the on-off control device, can effectively lift break-make control efficiency, improves the efficiency of interface fault investigation.
Description
Technical Field
The utility model relates to an urban rail transit technical field especially relates to an on-off control device.
Background
The urban rail transit signal system is one of important systems for ensuring driving safety and improving operation efficiency, and plays a vital role in the running process of a train. The urban rail transit signal system is usually connected with various external devices such as vehicle-mounted devices, station devices, control center devices and ground devices, so as to realize functions of driving command, operation adjustment, automatic train driving and the like.
The inventor discovers that: in the technical field of urban rail transit, external equipment and an urban rail transit signal system are usually provided by different manufacturers, time parameters such as sampling period, response delay, time synchronization and the like set by the manufacturers on the design of the external equipment and the urban rail transit signal system are inconsistent or interfaces are not matched, so that an interface fault can occur in the daily operation process of a train, and various circuit components such as a relay, a deconcentrator and the like can be generally configured between the external equipment and the urban rail transit signal system, so that the number of the interfaces between the external equipment and the urban rail transit signal system is increased, and the position of the interface fault is difficult to determine. Therefore, in the maintenance process of the system, a maintainer generally determines the approximate position of the interface fault in the circuit to be detected formed between the external equipment and the urban rail transit signal system by experience, then connects a mechanical switch at the position, observes the on-off condition of the interface between the external equipment and the urban rail transit signal system by manually controlling the on-off of the mechanical switch for multiple times, and then inspects the interface fault and analyzes the fault generation reason. However, because the on-off generation mode needs manual operation, the on-off control efficiency is low, and the efficiency of interface troubleshooting is reduced.
SUMMERY OF THE UTILITY MODEL
To the above problem, the utility model discloses an on-off control device can effectively improve on-off control's efficiency, and then improves the efficiency of interface troubleshooting.
In order to solve the technical problem, the on-off control device of the utility model comprises a photoelectric coupler and a switch tube; the first connecting pole of the input side of the photoelectric coupler is connected to the single chip microcomputer through a first resistor, the second connecting pole of the input side of the photoelectric coupler is connected to a first direct-current power supply, the first connecting pole of the output side of the photoelectric coupler is connected to a second direct-current power supply through a second resistor, and the second connecting pole of the output side of the photoelectric coupler is grounded through a third resistor; the control electrode of the switch tube is connected with the second connecting electrode of the output side of the photoelectric coupler, the first connecting electrode of the switch tube is connected to a circuit to be detected, and the second connecting electrode of the switch is grounded; the single chip microcomputer controls the connection or disconnection of the circuit to be detected by outputting a PWM signal.
Compared with the prior art, in the utility model, through singlechip output PWM switching signal, when singlechip output low level, the diode of photoelectric coupler is luminous, and the phototriode saturation among the photoelectric coupler switches on, and first resistance and second resistance partial pressure make to produce forward voltage between the control pole of switch tube and the second connecting pole, and the switch tube switches on, and then through the first connecting pole output voltage signal of switch tube, to waiting to detect the circuit power supply, photoelectric coupler plays isolation amplification; when the singlechip outputs a high level, the diode of the photoelectric coupler does not emit light, the phototriode is cut off, so that the switching tube is cut off, and a low-voltage signal is output through the first connecting electrode of the switching tube, so that the circuit to be detected is powered off. Because the utility model discloses a singlechip output PWM switching signal controls the switch-on or the disconnection of waiting to detect circuit, can effectively promote to treat that detection circuitry carries out on-off control's efficiency, improves the efficiency of interface troubleshooting.
As an improvement of the above scheme, the on-off control device further comprises a single-pole double-throw switch and a relay; the single-pole double-throw switch comprises a common end and two movable ends, wherein one movable end is connected with the common end; the relay is provided with a first output interface and a second output interface; the common end is connected with a first connecting pole of the switch tube, and one movable end is connected with a coil cathode of the relay; the coil anode of the relay is connected with the second direct-current power supply; and the other movable end or the first output interface of the relay is connected with the circuit to be detected.
As an improvement of the above scheme, the on-off control device further comprises a freewheeling diode, wherein the anode of the freewheeling diode is connected with the cathode of the coil of the relay, and the cathode of the freewheeling diode is connected with the anode of the coil of the relay.
As an improvement of the above scheme, the on-off control device further comprises a first indicator light and a second indicator light; one end of the first indicator light is connected to a first direct current power supply through a second output interface of the relay, and the other end of the first indicator light is grounded; the second indicator light is connected between the first connecting pole at the input side of the photoelectric coupler and the first direct-current power supply.
As an improvement of the above scheme, the on-off control device further comprises a first on-off control channel and a second on-off control channel; the circuit to be detected comprises a first sampling channel and a second sampling channel; the first on-off control channel is connected with the first sampling channel, and the second on-off control channel is connected with the second sampling channel; and the single chip microcomputer outputs the same PWM signal or different PWM signals to the first on-off control channel and the second on-off control channel respectively.
As an improvement of the above scheme, the on-off control device further comprises a keyboard connected with the single chip microcomputer and used for setting the pulse width of the PWM signal.
As an improvement of the above solution, the on-off control device is characterized in that the keyboard is a 4 × 4 matrix keyboard.
As an improvement of the above scheme, the on-off control device further comprises a keyboard indicator light, one end of the keyboard indicator light is connected to the single chip microcomputer, and the other end of the keyboard indicator light is connected to the first direct current power supply; and the singlechip controls the keyboard indicator lamp to emit light or extinguish according to the PWM signal.
As an improvement of the above scheme, the on-off control device further comprises a display connected with the single chip microcomputer and used for displaying the PWM signal.
As an improvement of the above scheme, the switch tube is an NMOS tube; the control electrode of the switch tube is a grid electrode of an NMOS tube, the first connecting electrode of the switch tube is a drain electrode of the NMOS tube, and the second connecting electrode of the switch tube is a source electrode of the NMOS tube.
Drawings
Fig. 1 is a schematic structural diagram of an on-off control device according to embodiment 1 of the present invention.
Fig. 2 is a schematic structural diagram of an on-off control device according to embodiment 2 of the present invention.
Fig. 3 is a schematic structural diagram of an on-off control device according to embodiment 3 of the present invention.
Fig. 4 is a schematic structural diagram of a keyboard in an embodiment of the present invention.
Fig. 5 is a schematic structural diagram of connection between the screen door equipment and the urban rail transit signal system.
Detailed Description
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The invention can be embodied in many other forms without departing from the spirit or essential characteristics thereof, and it should be understood that the invention is not limited to the specific embodiments disclosed below.
The technical solution of the present invention will be described in detail and fully with reference to the following embodiments and accompanying drawings.
Example 1
As shown in fig. 1, the on-off control device of the present invention includes a photoelectric coupler 1 and a switch tube 2; a first connecting pole at the input side of the photoelectric coupler 1 is connected to the singlechip 6 through a first resistor R1, a second connecting pole at the input side is connected to the first direct-current power supply 3, a first connecting pole at the output side is connected to the second direct-current power supply 4 through a second resistor R2, and a second connecting pole at the output side is grounded through a third resistor R3; the control pole of the switch tube 2 is connected with the second connecting pole at the output side of the photoelectric coupler 1, the first connecting pole of the switch tube 2 is connected to the circuit 5 to be detected, and the second connecting pole of the switch is grounded; the singlechip 6 controls the on or off of the circuit to be detected 5 by outputting a PWM signal.
In embodiment 1, the single chip microcomputer 6 outputs a PWM switching signal, when the single chip microcomputer 6 outputs a low level, a diode of the photoelectric coupler 1 emits light, a phototriode in the photoelectric coupler 1 is saturated and conducted, and the first resistor R1 and the second resistor R2 divide the voltage, so that a forward voltage is generated between the control electrode and the second connecting electrode of the switching tube 2, the switching tube 2 is conducted, and a voltage signal is output through the first connecting electrode of the switching tube 2 to supply power to the circuit 5 to be detected, and the photoelectric coupler 1 plays a role in isolation and amplification; when the single chip microcomputer 6 outputs a high level, the diode of the photoelectric coupler 1 does not emit light, the phototriode is cut off, the switching tube 2 is cut off, and therefore the low-voltage signal is output through the first connecting electrode of the switching tube 2, and the circuit 5 to be detected is powered off. Because the utility model discloses a 6 output PWM switching signals of singlechip control the switch-on or the disconnection of waiting to detect circuit 5, can effectively promote and treat that detection circuit 5 carries out on-off control's efficiency, improve the efficiency of interface troubleshooting.
As shown in fig. 1, the switching transistor 2 is an N-channel MOS transistor; the first connection electrode of the switch tube 2 is the drain electrode of the MOS tube, the second connection electrode of the switch tube 2 is the source electrode of the MOS tube, and the control electrode of the switch tube 2 is the grid electrode of the MOS tube.
Example 2
As shown in fig. 2, the present invention is another on-off control device, which comprises a single-pole double-throw switch 7 and a relay 8, in addition to all the components in embodiment 1; wherein, the single-pole double-throw switch 7 comprises a common end and two movable ends which are selected to be connected with the common end; the relay 8 is provided with a first output interface and a second output interface; the common end is connected with a first connecting pole of the switch tube 2, and one movable end is connected with the coil cathode of the relay 8; the coil anode of the relay 8 is connected with the second direct-current power supply 4; the other active terminal or the first output interface of the relay 8 is connected to the circuit to be tested 5.
In the present embodiment, the two ways of connecting the on-off control device to the circuit 5 to be tested are switched by a single-pole double-throw switch 7, wherein,
the first method is as follows: when the common end is connected with one of the movable ends, the circuit 5 to be detected can be directly connected with the drain electrode of the NMOS tube through the movable end, and the circuit 5 to be detected and the source electrode of the NMOS tube are grounded, so that the circuit 5 to be detected connected in the first mode can only be a direct current circuit.
The second method comprises the following steps: when the common end is connected with the other movable end, the circuit to be detected 5 is connected with the first output interface of the relay 8, and the circuit to be detected 5 is connected to the drain electrode of the NMOS tube through the relay 8; when the NMOS tube is conducted, the relay 8 is electrified, a switch in a first output interface of the relay 8 is closed, and the circuit to be detected 5 is connected with a power supply of the circuit to be detected; when the NMOS tube is cut off, the relay 8 loses power, a switch in a first output interface of the relay 8 is disconnected, and the circuit 5 to be detected is disconnected with a power supply of the circuit. Because the relay 8 can isolate the influence of the second direct current power supply 4 on the circuit 5 to be detected, the circuit 5 to be detected connected in the second mode can be a direct current circuit or an alternating current circuit.
Preferably, the on-off control device further comprises a freewheeling diode D3, wherein the anode of the freewheeling diode D3 is connected to the cathode of the coil of the relay 8, and the cathode of the freewheeling diode D3 is connected to the anode of the coil of the relay 8. When the coil of the relay 8 discharges to generate a reverse voltage, a current can be led out through the freewheeling diode D3, so as to prevent the reverse voltage from affecting the second dc power supply 4.
Preferably, the on-off control device further comprises a first indicator light D1 and a second indicator light D2; one end of the first indicator light D1 is connected to the first direct current power supply 3 through the second output interface of the relay 8, the other end of the first indicator light D1 is grounded through the fourth resistor R4, when the relay 8 is powered, a switch in the second output interface is closed, and the first indicator light D1 emits light; when the relay 8 loses power, the switch in the second output interface is turned off, and the first indicator light D1 is turned off. Because the first output interface of relay 8 is unanimous with getting electric and losing the power state of second output interface to the state of the first output interface of relay 8 can be instructed through first pilot lamp D1, the maintainer of being convenient for judges the state of relay 8. The second indicator light D2 is connected between the first connecting pole at the input side of the photoelectric coupler 1 and the first direct current power supply 3, when the single chip microcomputer 6 outputs low level, a diode in the photoelectric coupler 1 is conducted, and then the second indicator light D2 emits light; when the single chip microcomputer 6 outputs a high level, a diode in the photoelectric coupler 1 is cut off, and the second indicator light D2 is turned off, so that the working state of the photoelectric coupler 1 can be conveniently indicated.
Example 3
In the existing urban rail transit signal system, the circuit 5 to be detected is usually a dual-channel sampling circuit, which includes a first sampling channel 51 and a second sampling channel 52, that is, the circuit 5 to be detected simultaneously collects information of an external device through the two sampling channels, and monitors the state of the external device through the device information collected by the two sampling channels.
Binary channels sampling structure based on current urban mass transit signal system, the utility model discloses still provide another kind of on-off control device. As shown in fig. 3, the on-off control apparatus includes a first on-off control channel 100 and a second on-off control channel 200; the first on-off control channel 100 is connected with the first sampling channel 51, and the second on-off control channel 200 is connected with the second sampling channel 52; the single chip microcomputer 6 outputs the same PWM signal or different PWM signals to the first on-off control channel 100 and the second on-off control channel 200, respectively.
For example, when the first sampling channel 51 and the second sampling channel 52 of the circuit 5 to be tested are identical in flash section, the single chip microcomputer 6 outputs the same PWM signals to the first on-off control channel 100 and the second on-off control channel 200 respectively; when the response delay between the first sampling channel 51 and the second sampling channel 52 of the circuit 5 to be tested is tested, the single chip microcomputer 6 can respectively output a first PWM signal and a second PWM signal with the same pulse width to the first on-off control channel 100 and the second on-off control channel 200, and a preset delay exists between the first PWM signal and the second PWM signal, and the response delay between the first sampling channel 51 and the second sampling channel 52 can be determined by adjusting the time length of the preset delay; when the sampling time of the circuit 5 to be detected is different, the single chip microcomputer 6 can also output a first PWM signal and a second PWM signal with different pulse widths to the first on-off control channel 100 and the second on-off control channel 200 respectively to determine the sampling time of the first sampling channel 51 and the second sampling channel 52.
Because the single chip microcomputer 6 can output PWM signals to the double-channel sampling circuit of the urban rail transit signal system, and the pulse width of the PWM signals can be adjusted through the single chip microcomputer 6, the consistency of interface parameters of the double-channel sampling circuit in the urban rail transit signal system can be rapidly judged, and the efficiency of interface troubleshooting is further improved.
Preferably, the on-off control device further comprises a keyboard, a keyboard indicator light and a display 9. The keyboard is connected to the single chip microcomputer 6 and used for setting the pulse width of the PWM signal, and specifically, the keyboard is a 4 × 4 matrix keyboard. As shown in fig. 4, the matrix keyboard is a number key 0-9, a PWM signal mode key M1-M3, a SET key SET, an OK key and a START key START, respectively, wherein the PWM signal mode key M1 is used for generating a synchronous PWM signal that is continuously repeated from "on" to "off" to simulate synchronous flash of two channels; the PWM signal mode key M2 is used for generating asynchronous PWM signals, wherein the initial states of the two channels are all 'on', the first on-off control channel 100 is firstly 'off', and the second on-off control channel 200 is then 'off' after preset delay time, so as to simulate that the two channels are asynchronous; the PWM signal mode key M3 is used to generate asynchronous PWM signals in which the initial states of the two channels are both off, the first on-off control channel 100 is first turned on, and the second on-off control channel 200 is turned on after a preset delay time, so as to simulate asynchronous PWM signals of the two channels. The matrix keyboard is provided with an L1-L4 end and an H1-H4 end which are connected with the single chip microcomputer 6 and used for collecting commands generated by the matrix keyboard. In a specific implementation process, the PWM signal output by the single chip microcomputer 6 can be preset through a matrix keyboard, for example, when a SET key SET-mode key M1 is pressed in sequence, the pulse width of the synchronous PWM signal in the mode 1 can be input through a numeric keyboard 0-9; when a SET key SET-mode key M2 is pressed in sequence, the preset delay time of the double-channel asynchronous PWM signal in the mode 2 can be input through a numeric keyboard 0-9; when a SET key SET-mode key M3 is pressed in sequence, the preset delay time of the double-channel asynchronous PWM signal in the mode 2 can be input through a numeric keyboard 0-9; after setting the PWM signal in any one of the 3 manners, pressing the OK key completes the setting, and then pressing the START key, the single chip microcomputer 6 outputs the corresponding PWM signal to the first on-off control channel 100 and the second on-off control channel 200, respectively, and displays the corresponding PWM signal through the display 9.
Preferably, the keyboard indicator lamps include M1 keyboard indicator lamps D4, M2 keyboard indicator lamps D5 and M3 keyboard indicator lamps D6, wherein one end of each of the M1 keyboard indicator lamps D4-M3 keyboard indicator lamps D6 is connected to the single chip microcomputer 6 through a fifth resistor R5, a sixth resistor R6 and a seventh resistor R7, respectively, and the other end of each of the keyboard indicator lamps is connected to the first direct current power supply 3, and when the single chip microcomputer 6 outputs any one of PWM signals in M1-M3 modes, the single chip microcomputer 6 further controls the corresponding keyboard indicator lamp to emit light.
The technical solution of the present invention is described in detail below by taking the connection between the shield door device and the urban rail transit signal system as an example.
Fig. 5 is a schematic structural diagram of connection between the screen door device and the urban rail transit signal system. Because 11-14, 15-18 and 19-22 double-channel interfaces exist between the screen door equipment and the urban rail transit signal system, when the urban rail transit signal system displays that the screen door equipment breaks down, the 3 double-channel interfaces need to be checked in sequence. As shown in fig. 3 and fig. 5, for example, to detect the PSL interlock release, the first on-off control of the circuit on-off control device of the present invention can be connected to the first sampling channel 11, 12, and the second on-off control channel 200 is connected to the second sampling channel 13, 14, so as to detect whether the interface between the PSL interlock release device and KA1 is faulty or not.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any form, so that any simple modification, equivalent change and modification made by the technical entity of the present invention to the above embodiments without departing from the technical solution of the present invention all fall within the scope of the technical solution of the present invention.
Claims (10)
1. An on-off control device is characterized by comprising a photoelectric coupler, a singlechip and a switch tube;
the first connecting pole of the input side of the photoelectric coupler is connected to the single chip microcomputer through a first resistor, the second connecting pole of the input side of the photoelectric coupler is connected to a first direct-current power supply, the first connecting pole of the output side of the photoelectric coupler is connected to a second direct-current power supply through a second resistor, and the second connecting pole of the output side of the photoelectric coupler is grounded through a third resistor;
the control electrode of the switch tube is connected with the second connecting electrode of the output side of the photoelectric coupler, the first connecting electrode of the switch tube is connected to a circuit to be detected, and the second connecting electrode of the switch is grounded;
the single chip microcomputer controls the connection or disconnection of the circuit to be detected by outputting a PWM signal.
2. The on-off control device of claim 1, further comprising a single pole double throw switch and a relay; wherein,
the single-pole double-throw switch comprises a common end and two movable ends;
the relay is provided with a first output interface and a second output interface;
the common end is connected with a first connecting pole of the switch tube, and one movable end is connected with a coil cathode of the relay;
the coil anode of the relay is connected with the second direct-current power supply;
and the other movable end or the first output interface of the relay is connected with the circuit to be detected.
3. The on-off control device of claim 2, further comprising a freewheeling diode, an anode of the freewheeling diode being connected to a cathode of the coil of the relay, and a cathode of the freewheeling diode being connected to an anode of the coil of the relay.
4. The on-off control device of claim 2, further comprising a first indicator light and a second indicator light;
one end of the first indicator light is connected to a first direct current power supply through a second output interface of the relay, and the other end of the first indicator light is grounded;
the second indicator light is connected between the first connecting pole at the input side of the photoelectric coupler and the first direct-current power supply.
5. The on-off control device of claim 1, wherein the on-off control device comprises a first on-off control channel and a second on-off control channel;
the circuit to be detected comprises a first sampling channel and a second sampling channel;
the first on-off control channel is connected with the first sampling channel, and the second on-off control channel is connected with the second sampling channel;
and the single chip microcomputer outputs the same PWM signal or different PWM signals to the first on-off control channel and the second on-off control channel respectively.
6. The on-off control device of claim 1, further comprising a keyboard connected to the single chip for setting a pulse width of the PWM signal.
7. The on-off control of claim 6, wherein said keypad is a 4 x 4 matrix keypad.
8. The on-off control device of claim 7, further comprising a keyboard indicator light, wherein one end of the keyboard indicator light is connected to the single chip microcomputer, and the other end of the keyboard indicator light is connected to the first direct current power supply;
and the singlechip controls the keyboard indicator lamp to emit light or extinguish according to the PWM signal.
9. The on-off control device of claim 1, further comprising a display connected to the single chip for displaying the PWM signal.
10. The on-off control device according to any one of claims 1 to 9, wherein the switching tube is an NMOS tube; the control electrode of the switch tube is a grid electrode of an NMOS tube, the first connecting electrode of the switch tube is a drain electrode of the NMOS tube, and the second connecting electrode of the switch tube is a source electrode of the NMOS tube.
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| CN201720365841.1U CN206639004U (en) | 2017-04-07 | 2017-04-07 | A kind of on-off control device |
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| CN201720365841.1U CN206639004U (en) | 2017-04-07 | 2017-04-07 | A kind of on-off control device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113138889A (en) * | 2021-03-26 | 2021-07-20 | 山东英信计算机技术有限公司 | Test circuit and server |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113138889A (en) * | 2021-03-26 | 2021-07-20 | 山东英信计算机技术有限公司 | Test circuit and server |
| CN113138889B (en) * | 2021-03-26 | 2022-05-17 | 山东英信计算机技术有限公司 | Test circuit and server |
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