CN210670703U - Interface circuit with output detection function street lamp controller - Google Patents
Interface circuit with output detection function street lamp controller Download PDFInfo
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- CN210670703U CN210670703U CN201921052477.9U CN201921052477U CN210670703U CN 210670703 U CN210670703 U CN 210670703U CN 201921052477 U CN201921052477 U CN 201921052477U CN 210670703 U CN210670703 U CN 210670703U
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Abstract
The utility model provides an interface circuit with output detects function street lamp controller, under this interface circuit is supplementary, street lamp controller can automatic check and judge whether relay normally works. This interface circuit, including output relay detection signal level conversion circuit, its characterized in that: the device consists of an optocoupler diode, a protection diode and a plurality of resistors; the light-emitting tube of the optocoupler diode is connected with the protection diode in parallel, one end of the optocoupler diode is connected with a zero line, and the other end of the optocoupler diode is connected with a live wire output by the relay after being connected with the resistor in series; one end of the optocoupler diode receiving tube is grounded, and the other end of the optocoupler diode receiving tube is connected with a pull-up resistor in series to output a digital level to the MCU. The interface circuit assists the street lamp controller MCU to accomplish the automated inspection to relay operating condition to realize the accurate positioning of street lamp illumination fault position, simplify maintenance personal's maintenance work into pure repair and replacement part operation, improve maintenance work's efficiency.
Description
Technical Field
The utility model relates to a street lamp controller field, concretely relates to interface circuit with output detects function street lamp controller.
Background
The street lamp controller mainly controls the on and off of the street lamp, supports light control, time control, remote control and the like, and scientifically switches on and off the street lamp, and is energy-saving. The street lamp controller integrates the electromagnetic technology, the intelligent control technology and the data control technology, intelligently adjusts in a controllable and gentle mode, enables output voltage to be stabilized between set rated value ranges, realizes ideal combination of working current and brightness requirements of a public lighting system, achieves the purposes of power saving and optimized power supply, has the power saving rate of 20-40%, and can prolong the service life of an electric system by 3-4 times under the protection effect of the street lamp controller on the electric system.
At present, street lamp controllers have been widely used in public lighting environments such as town roads, highways, bridges, tunnels, gardens, docks, sightseeing lights, sports squares, amusement parks, advertising light boxes and the like; the street lamp controller is applicable to the following lamp types: all gas discharge type lighting fixtures such as high pressure sodium lamps, low pressure sodium lamps, metal halide lamps, high pressure mercury lamps, fluorescent lamps, and the like.
However, a component relay for realizing the switching of the lamp and the lamp in the street lamp controller have a certain service life, and the switching times exceed a certain threshold and then may fail or be damaged. When the lamp does not normally illuminate any more, a maintenance worker needs to overhaul the lamp on site; firstly, whether the relay or the lamp fails is judged, and then the relay or the lamp is replaced. The field inspection operation obviously increases the workload of maintenance personnel, and needs municipal administration departments to invest in great human resources.
SUMMERY OF THE UTILITY MODEL
The utility model provides an interface circuit with output detects function street lamp controller, under this interface circuit is supplementary, street lamp controller can automatic check and judge whether relay normally works.
The utility model discloses the technical problem that solve is realized through following technical scheme:
the utility model provides an interface circuit with output detects function street lamp controller, including output relay detection signal level converting circuit, its characterized in that: the device consists of an optocoupler diode, a protection diode and a plurality of resistors; the light-emitting tube of the optocoupler diode is connected with the protection diode in parallel, one end of the optocoupler diode is connected with a zero line, and the other end of the optocoupler diode is connected with a live wire output by the relay after being connected with the resistor in series; one end of the optocoupler diode receiving tube is grounded, and the other end of the optocoupler diode receiving tube is connected with a pull-up resistor in series to output a digital level to the MCU.
Preferably, the number and the resistance value of the resistors connected with the live wire of the relay output are adjusted, and the input part of the signal level conversion circuit plays a role in voltage division and current limitation.
Preferably, the transmitting stage of the optocoupler diode receiving tube is grounded, and the collector is connected in series with a pull-up resistor to output a digital level to the MCU.
Preferably, the interface circuit further comprises a relay switch control drive circuit: the device consists of a triode, a reverse freewheeling diode and a resistor; one end of the resistor is connected with a relay switch control digital signal output by the MCU, and the other end of the resistor is connected with a base electrode of the triode; the emitter of the triode is grounded, one end of the reverse freewheeling diode is connected with the power supply after being connected with the input loop of the relay, namely the control system in parallel, and the other end of the reverse freewheeling diode is connected with the collector of the triode.
The beneficial effects of the utility model reside in that, the automatic detection to relay operating condition is accomplished to the supplementary street lamp controller MCU of interface circuit to realize the accurate positioning of street lamp illumination fault position, simplify maintainer's maintenance work into pure repair and change the part operation, improve maintenance work's efficiency.
Drawings
FIG. 1 is the electrical connection relationship and basic working schematic diagram of the interface circuit with output detection function street lamp controller of the utility model, the street lamp controller MCU, the lamps and the relay;
fig. 2 is a detection signal level conversion circuit of the output relay in the interface circuit of the street lamp controller with the output detection function of the present invention;
fig. 3 is the utility model discloses a relay switch control drive circuit in the interface circuit of street lamp controller with output detection function.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
Fig. 1 shows the basic working principle and the electrical connection relationship between the interface circuit of the street lamp controller with the output detection function and the street lamp controller MCU, the lamp and the relay according to this embodiment. The existing street lamp controller consists of a street lamp controller MCU, a relay and other peripheral equipment, and executes the on-off control of the lamp. The utility model discloses added an interface circuit in to street lamp controller, the effect is the output that detects the relay to help confirm under the condition that lamps and lanterns can not normally throw light on, concrete fault location is lamps and lanterns or relay. The street lamp controller MCU outputs relay control digital signals, and the relay control digital signals drive and control the relay switch through digital-to-analog conversion of the interface circuit. The relay contact is connected with a live wire Lin for supplying power to the lamp. One end of the lamp is connected with the zero line N, and the other end of the lamp is connected with the relay output Lout. When the street lamp controller outputs an on signal to the interface circuit, the interface circuit converts the digital signal into an analog signal to drive the relay, so that the Lin and the Lout are conducted, and the lamp is electrified. One path of the Lout alternating voltage output by the relay supplies power to the lamp, and the other path of the Lout alternating voltage is transmitted to the street lamp controller MCU through the interface circuit. If the MCU receives the signal, whether the relay works normally can be judged. If the output of the relay is normal, the lamp is not on, and the lamp is broken. If the MCU does not receive the signal, the lamp is not on, and the relay is broken. When the street lamp has a failure, the controller of the street lamp or the lamp itself can be judged to be damaged by the output detection function. According to the flow direction of signals between the street lamp controller and the peripheral circuit, the interface circuit is divided into a signal uplink branch circuit and a signal downlink branch circuit, namely an output relay detection signal level conversion circuit and a relay control signal generation circuit.
Fig. 2 is the utility model discloses an output relay detection signal level switching circuit among the interface circuit with output detection function street lamp controller. If the on signal sent by the street lamp controller drives the subsequent electric appliance to work normally through the interface circuit, the current is divided and limited through the resistors R2, R3 and R4 in the alternating current positive period after the Lout is conducted, and the light emitting diode U1 emits light to obtain a conducting voltage and a conducting current, so that the street lamp is conducted in the forward direction. And the protection diode D2 is reversely biased to be cut off, the optocoupler diode receiving tube receives light and then is conducted to the ground, and low level is output to the MCU. In an alternating current negative period after the current is conducted, the current is divided and limited through resistors R2, R3 and R4, a protection diode D2 is conducted in the forward direction, a light emitting tube of an optocoupler diode U1 is cut off in the reverse direction, a receiving tube of the optocoupler diode is opened, the optocoupler diode is pulled to a high level through a pull-up resistor R5, and the high level is output to the MCU. Therefore, under the condition that the output of the relay is normal, the MCU receives a 50HZ square wave after giving a relay opening signal through the driving and level conversion of the interface circuit, namely the high and low levels can appear alternately at the frequency of 50 HZ.
If the MCU sends a relay opening digital signal, the output of the relay is abnormally disconnected, namely Lin and Lout are not conducted, and the fact that the relay is damaged is shown. Lout does not carry 220V alternating current, and the transmitting end of the optocoupler diode U1 cannot detect voltage and is not conducted; the receiving end of the optocoupler diode is not conducted, and a high level is output to the MCU through the pull-up resistor R5. Therefore, under the condition that the relay is abnormally disconnected, the MCU receives a high level all the time after giving a relay opening signal through the driving and the level conversion of the interface circuit.
Fig. 3 is the utility model discloses a relay switch control drive circuit in the interface circuit of street lamp controller with output detection function. The circuit can drive a normally open relay with the contacts in an open state when the relay coil is not energized. When the relay coil is electrified, the contact points are in a conducting state. RLY _ ON _ OFF is a relay control digital signal which is output to the relay control signal generating circuit by the MCU, when RLY _ ON _ OFF is at a high level, the base electrode of the first pin of the triode Q1 is at a high level, Q1 is in saturated conduction, two ends of a relay coil are electrified, certain current flows through the relay coil, therefore, an electromagnetic effect is generated, the contact of the relay is closed, and Lin and Lout are conducted. When RLY _ ON _ OFF is at low level, the base of the first pin of the triode Q1 is at low level, Q1 is cut OFF, the two ends of the coil of the relay are powered OFF, the contact of the relay is disconnected, and Lin and Lout are not conducted. R1 is a current-limiting resistor, which limits the base current of the transistor Q1 to achieve the effect of protecting the relay to drive the transistor Q1. Q1 is relay drive triode, improves the driving capability. D1 is a reverse freewheeling diode that provides a bleed path for current in the relay coil and clamps its voltage to 12V when the transistor is turned from on to off.
Claims (4)
1. The utility model provides an interface circuit with output detects function street lamp controller, includes output relay detection signal level switching circuit, its characterized in that: the device consists of an optocoupler diode, a protection diode and a plurality of resistors; the light-emitting tube of the optocoupler diode is connected with the protection diode in parallel, one end of the optocoupler diode is connected with a zero line, and the other end of the optocoupler diode is connected with a live wire output by the relay after being connected with the resistor in series; one end of the optocoupler diode receiving tube is grounded, and the other end of the optocoupler diode receiving tube is connected with a pull-up resistor in series to output a digital level to the MCU.
2. The interface circuit of claim 1, wherein: the number and the resistance value of the resistors of the live wire connected with the output of the relay are adjusted, and the input part of the signal level conversion circuit plays a role in voltage division and current limitation.
3. The interface circuit of claim 1, wherein: the transmitting stage of the optocoupler diode receiving tube is grounded, and the collector is connected with a pull-up resistor in series to output a digital level to the MCU.
4. The interface circuit according to any one of claims 1 to 3, further comprising a relay switch control drive circuit: the device consists of a triode, a reverse freewheeling diode and a resistor; one end of the resistor is connected with a relay switch control digital signal output by the MCU, and the other end of the resistor is connected with a base electrode of the triode; the emitter of the triode is grounded, one end of the reverse freewheeling diode is connected with the power supply after being connected with the input loop of the relay, namely the control system in parallel, and the other end of the reverse freewheeling diode is connected with the collector of the triode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921052477.9U CN210670703U (en) | 2019-07-08 | 2019-07-08 | Interface circuit with output detection function street lamp controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921052477.9U CN210670703U (en) | 2019-07-08 | 2019-07-08 | Interface circuit with output detection function street lamp controller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210670703U true CN210670703U (en) | 2020-06-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921052477.9U Active CN210670703U (en) | 2019-07-08 | 2019-07-08 | Interface circuit with output detection function street lamp controller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210670703U (en) |
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2019
- 2019-07-08 CN CN201921052477.9U patent/CN210670703U/en active Active
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Effective date of registration: 20240426 Address after: No. 580, section 3, Shuanghua Road, Shuangliu Southwest Airport Economic Development Zone, Chengdu, Sichuan 610207 Patentee after: SICHUAN HUATI LIGHTING TECHNOLOGY Co.,Ltd. Country or region after: China Address before: Room 1402, Building A, No. 199 Tianfu Fourth Street, High tech Zone, Chengdu City, Sichuan Province, 610207 Patentee before: Chengdu huati Huicheng Technology Co.,Ltd. Country or region before: China |