Signal control circuit and signal controller

Abstract

The utility model discloses a signal control circuit and a signal controller, and relates to the technical field of signal control. The output end of the auxiliary detection unit is in communication connection with the main processing unit, and the input end of the auxiliary detection unit is used for being electrically connected with a voltage detection circuit and / or a circuit detection circuit; the input end of the silicon controlled rectifier unit is in communication connection with the main processing unit, and the output end of the silicon controlled rectifier unit is used for being connected with a signal lamp. Original equipment can be replaced by old equipment, the reliability is high, and the cost is low.

Description

Technical Field

[0001] This utility model relates to the field of signal control technology, specifically a signal control circuit and a signal controller. Background Technology

[0002] A signal controller is an electronic device used to control and manage traffic signals. It determines when to change the state of a signal by receiving and processing information from sensors and monitoring equipment.

[0003] For example, Chinese Patent CN105355069B discloses a signal light fault detection circuit and its detection and control method with voltage and current detection functions. The circuit includes a signal light connected to the output terminal of a signal controller's SCR (Semiconductor Controlled Rectifier). It also includes a current detection circuit and a voltage detection circuit. The voltage detection circuit is connected in parallel to the signal light, and the current detection circuit is connected in series in the circuit loop between the signal light and the SCR output terminal of the signal controller. This circuit possesses both voltage and current detection functions, enabling real-time fault detection of the signal light, improving its reliability, and achieving accurate and reliable fault detection.

[0004] Currently, with the accelerated construction of smart city brains based on cloud platforms, the existing equipment is no longer sufficient to meet the needs. Many small and medium-sized cities have a strong demand for direct replacement of old equipment, requiring both intelligent control based on cloud platforms and strict cost control based on the size of intersections. However, while some signal equipment launched by manufacturers meets the requirements of intelligence, it is expensive and cannot be reused.

[0005] Therefore, there is an urgent need to develop a signal control circuit and signal controller to solve the problems in the existing technology. Utility Model Content

[0006] The purpose of this utility model is to provide a signal control circuit and a signal controller that can replace existing equipment at a lower cost, thereby solving the problem mentioned in the background art that some current signal controllers are too large to be reused and replaced.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A signal control circuit, comprising:

[0009] Main processing unit;

[0010] An auxiliary detection unit, the output of which is communicatively connected to the main processing unit, and the input of which is electrically connected to a voltage detection circuit and / or a circuit detection circuit;

[0011] A thyristor unit, the input of which is communicatively connected to the main processing unit, and the output of which is used to connect to an indicator light.

[0012] Furthermore, the auxiliary detection unit includes:

[0013] A voltage detection unit, the output of which is connected to the main processing unit, and the input of which is connected to the voltage detection circuit;

[0014] A current detection unit, the output of which is connected to the main processing unit, and the input of which is connected to the current detection circuit.

[0015] Furthermore, the voltage detection unit includes a microcontroller, the positive power pin of which is connected to the output terminal of a voltage regulator chip; the input terminal of the voltage regulator chip is used to connect to the live wire of the AC power supply, and the ground terminal is used to connect to the neutral wire of the AC power supply.

[0016] Furthermore, the current detection unit includes a microcontroller, the positive power supply pin of which is connected to the output terminal of a voltage regulator chip; the input terminal of the voltage regulator chip is used to connect to the neutral wire of the AC power supply, and the grounding terminal is used to connect to the live wire of the AC power supply.

[0017] Furthermore, the ADC pin of the voltage detection unit is connected to the current detection input test point, and the ADC pin of the voltage detection unit is connected to the voltage detection input test point.

[0018] Furthermore, the voltage detection unit is connected to the main processing unit via an optocoupler, and the current detection unit is also connected to the main processing unit via an optocoupler.

[0019] Furthermore, the signal control circuit also includes a voltage regulator circuit, which includes a transformer, a rectifier bridge, voltage regulator chips U3, U32, and U28. One side of the transformer is connected to AC power, and the other side is connected to the input terminals of voltage regulator chips U3 and U32 respectively. Voltage regulator chip U3 outputs a 4V voltage, and voltage regulator chip U32 outputs a 5V voltage. The output terminal of voltage regulator chip U3 is also connected to the input terminal of voltage regulator chip U28, and the output terminal of voltage regulator chip U28 outputs a 3.3V voltage.

[0020] Furthermore, the signal control circuit also includes:

[0021] A memory, which is connected to the main processing unit, and at least one memory is provided;

[0022] A wireless communication module is provided, which is connected to the main processing unit, and at least one wireless communication module is provided.

[0023] A wired communication module is provided, which is connected to the main processing unit, and at least one wired communication module is provided.

[0024] A temperature and humidity sensor is provided, and the temperature and humidity sensor is communicatively connected to the main processing unit.

[0025] Furthermore, the signal control circuit also includes an intersection simulation indicator unit, which includes a digital tube, a dual-color LED, and a display scanning chip. The display scanning chip is communicatively connected to the main processing unit, and the display scanning chip is electrically connected to the dual-color LED and the digital tube respectively. The dual-color LED is electrically connected to the digital tube.

[0026] A signal controller, comprising the aforementioned signal control circuit.

[0027] Compared with the prior art, the beneficial effects of this utility model are:

[0028] (1) By setting up an auxiliary detection unit, the current and voltage sampling and digital-to-analog conversion work can be handled by the auxiliary detection unit, avoiding the main processing unit from spending a lot of time on simple tasks and reducing the cost of accessories. At the same time, by sampling directly through the smaller auxiliary detection unit, it is possible to avoid using larger voltage transformers and current transformers for sampling, which greatly reduces the circuit size, helps to miniaturize the product, and facilitates the upgrading and replacement of the original signal control equipment.

[0029] (2) The auxiliary detection unit transmits the data to the main processing unit after optical isolation, which further ensures equipment safety and improves equipment reliability.

[0030] (3) Multiple wireless communication and wired communication interfaces are set up to facilitate the replacement of existing equipment, expand the types of existing equipment that can be replaced, improve the adaptability of this product, and the signal control function can be continuously upgraded by relying on the cloud platform through wireless communication, making operation convenient.

[0031] Other features and advantages of this utility model will be disclosed in detail in the following specific embodiments and accompanying drawings. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the overall structure of the signal control circuit;

[0033] Figure 2 This is a circuit diagram of the main processing unit;

[0034] Figure 3This is a circuit diagram of the voltage detection unit;

[0035] Figure 4 This is a circuit diagram of the current detection unit;

[0036] Figure 5 This is a circuit diagram of a silicon controlled rectifier (SCR) unit. Figure 1 ;

[0037] Figure 6 This is a circuit diagram of a silicon controlled rectifier (SCR) unit. Figure 2 ;

[0038] Figure 7 This is a circuit diagram of a silicon controlled rectifier (SCR) unit. Figure 3 ;

[0039] Figure 8 This is a circuit diagram showing the voltage detection unit connected to the voltage detection input test point;

[0040] Figure 9 This is a circuit diagram of a voltage regulator circuit;

[0041] Figure 10 This is a circuit diagram of the memory;

[0042] Figure 11 This is a circuit diagram of a 4G module;

[0043] Figure 12 This is a circuit diagram of the LoRa module;

[0044] Figure 13 This is a circuit diagram of an Ethernet network.

[0045] Figure 14 This is a circuit diagram of an RS232 serial port;

[0046] Figure 15 This is a circuit diagram of an RS485 serial port;

[0047] Figure 16 This is a circuit diagram of a digital input serial port;

[0048] Figure 17 This is a circuit diagram of a temperature and humidity sensor;

[0049] Figure 18 This is a circuit diagram of an intersection simulation indicator unit. Detailed Implementation

[0050] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0051] A signal control circuit, such as Figure 1 and Figure 2As shown, it includes:

[0052] Main processing unit;

[0053] An auxiliary detection unit, the output of which is communicatively connected to the main processing unit, and the input of which is electrically connected to a voltage detection circuit and / or a circuit detection circuit;

[0054] A thyristor unit, the input of which is communicatively connected to the main processing unit, and the output of which is used to connect to an indicator light.

[0055] In this embodiment, the main processing unit is mainly used to run signal control programs, run phase logic, process communication logic, implement user interfaces, and expand device management, etc.; the auxiliary detection unit is used to control the load voltage detection circuit and the load current detection circuit; the thyristor is used to control the indicator lights according to the drive signals issued by the main processing unit.

[0056] The main processing unit includes a CH32V307 microcontroller; the auxiliary detection unit includes an STC8H2K08U microcontroller.

[0057] This application, by setting up an auxiliary detection unit, delegates the tasks of current and voltage sampling and digital-to-analog conversion to the auxiliary detection unit, avoiding the main processing unit spending a large amount of time on simple tasks and reducing component costs. Meanwhile, the individual dimensions of the STC8H2K08U microcontroller are approximately 7mm × 7mm, the voltage transformer is approximately 20mm × 16mm, and the current transformer is approximately 17mm × 10mm. By using a smaller auxiliary detection unit for sampling, this application avoids the use of larger voltage and current transformers, significantly reducing circuit size, contributing to product miniaturization, and facilitating the upgrade and replacement of existing signal control equipment.

[0058] The auxiliary detection unit includes:

[0059] A voltage detection unit is provided, the output of which is connected to the main processing unit, and the input of which is connected to the voltage detection circuit. The voltage detection unit is used to control the load voltage detection circuit and transmits the data to the main microcontroller via a serial port.

[0060] A current detection unit is provided, the output of which is connected to the main processing unit, and the input of which is connected to the current detection circuit. The current detection unit is used to control the load current detection circuit and transmits the data to the main microcontroller via a serial port.

[0061] In this embodiment, as Figure 3As shown, the voltage detection unit includes a microcontroller U22, model STC8H2K08U. The positive power pin of the microcontroller U22 is connected to the live wire of the AC power supply via a voltage regulator chip U4. The voltage regulator chip U4 is model HT7150. Its third terminal is connected to the live wire AC-L1, its second terminal outputs a dv5 voltage, and its third terminal is connected to the neutral wire AC-N. The ground pin of the microcontroller U22 is connected to the neutral wire AC-N.

[0062] The 12 ADC pins of the microcontroller U22 are used to connect to voltage detection input test points. In this embodiment, the 12 ADC pins of the microcontroller U22 are pin 1, pin 2, pin 3, pin 4, pin 5, pin 13, pin 14, pin 15, pin 16, pin 17, pin 19 and pin 20. The 12 ADC pins of the microcontroller U22 are connected to 12 current detection input test points through resistors.

[0063] In this embodiment, AC-L1 is connected to resistor R5, followed by the negative terminals of diodes D16 and D13. The positive terminal of diode D13 is connected to the positive terminal of capacitor C33 and the third terminal of voltage regulator chip U4. The second terminal of voltage regulator chip U4 is connected to one end of capacitor C34, the negative terminal of diode D55, pins 8 and 9 of U223, and one end of resistor R135. The other end of resistor R135 is connected to the negative terminal of LED D35, and the positive terminal of LED D35 is connected to pin 11 of U22. AC-N is connected to the positive terminal of diode D16, the negative terminal of capacitor C33, the third terminal of voltage regulator chip U4, the other end of capacitor C34, the positive terminal of diode D55, and pin 10 of U22. In this embodiment, the AC voltage can be 220V, and the dv5 voltage can be 5V.

[0064] The voltage detection unit is connected to the main processing unit via an optocoupler. In this embodiment, the optocoupler is a PC817. Pin 12 of U22 is connected to the second end of optocoupler U25. The first end of optocoupler U25 is connected to the d5V voltage via resistor R58. The third end of optocoupler U25 is grounded. The fourth end of optocoupler U25 is connected to pin 69 of microcontroller U31 for communication.

[0065] like Figure 4 As shown, the current detection unit includes a microcontroller U23, and the model of the microcontroller U23 is STC8H2K08U.

[0066] The 12 ADC pins of the microcontroller U23 are used to connect to the current detection input test points. In this embodiment, the 12 ADC pins of the microcontroller U23 are pin 1, pin 2, pin 3, pin 4, pin 5, pin 13, pin 14, pin 15, pin 16, pin 17, pin 19 and pin 20. The 12 ADC pins of the microcontroller U23 are connected to the 12 current detection input test points cur1-cur12 through resistors.

[0067] The microcontroller U23 is connected to AC power via a voltage regulator chip U24. The input terminal of the voltage regulator chip U24 is connected to the AC neutral wire (AC-N), and its ground terminal is connected to the AC live wire (AC-L). The ground pin of the microcontroller U23 is connected to the AC live wire (AC-L). The communication pin of the microcontroller U23 includes pin 12, which is connected to an optocoupler U6. The optocoupler U6 is a PC817. Its first terminal is connected to the output terminal of the voltage regulator chip U24, its second terminal is connected to the communication pin of the microcontroller U23, its third terminal is grounded, and its fourth terminal is connected to the communication pin of the microcontroller U31. In this embodiment, the fourth terminal is connected to pin 79 of the microcontroller U31.

[0068] Specifically, the method of powering the microcontroller with AC power through a voltage regulator chip can employ existing technology, which will not be elaborated upon here. In this embodiment, the microcontrollers U22 and U23 operate at high voltage on the load side, and the voltage regulator chips are used independently, with a high potential difference between them and other parts of the circuit.

[0069] The load voltage detection circuit is used to detect the operating voltage on the load, and the load current detection circuit is used to detect the operating current on the load. In this embodiment, the load voltage detection circuit has 12 channels, and the load current detection circuit also has 12 channels. The 12-channel load voltage detection circuit and the 12-channel load current detection circuit are respectively connected to the voltage detection unit and the current detection unit.

[0070] like Figures 5 to 7 As shown, in this embodiment, 12 thyristor units are provided, and the circuit structures of different thyristor units can be the same or different. Each thyristor unit includes a thyristor, model BT136, with a current detection input test point at its first terminal and a voltage detection input test point at its second terminal. In this embodiment, the thyristor unit also includes an optocoupler, model EL3063S. The first terminal of the optocoupler is connected to the IO communication pin of the microcontroller U31 via a resistor, the second terminal is grounded, the fourth terminal is connected to the first terminal of the thyristor, and the sixth terminal is connected to the second terminal of the thyristor via a resistor. Specifically, the connections between the optocoupler and the thyristor, and between the thyristor and the indicator light, can be referred to existing technologies and will not be elaborated further in this application.

[0071] like Figure 8 As shown, the voltage detection unit is connected to the voltage detection input test point via several resistors and a fuse.

[0072] like Figure 9 As shown, the signal control circuit also includes a voltage regulator circuit, which is electrically connected to the main processing unit and is used to supply power to the main processing unit and other peripheral circuits.

[0073] In this embodiment, the voltage regulator circuit includes a transformer T2, a rectifier bridge, a voltage regulator chip U3, a voltage regulator chip U32, and a voltage regulator chip U28. The transformer T2 is a 12V transformer (model T28), the rectifier bridge is an ABS210, the voltage regulator chip U3 is an LGS5145, the voltage regulator chip U32 is an HT7150, and the voltage regulator chip U28 is an MCP1754S.

[0074] One side of the transformer T2 is connected to AC power, and the other side is connected to the input terminals of voltage regulator chips U3 and U32 respectively. Voltage regulator chip U3 outputs 4V, and voltage regulator chip U32 outputs 5V. The output terminal of voltage regulator chip U3 is also connected to the input terminal of voltage regulator chip U28, and the output terminal of voltage regulator chip U28 outputs 3.3V. Specifically, the connections between the transformer T2, rectifier bridge, voltage regulator chips U3, U32, and U28 can use existing technology, which will not be elaborated further in this application.

[0075] In this embodiment, the voltage regulator circuit outputs one 5VDC, one 4VDC, and one 3.3VDC, which are supplied to the microcontroller U31 and peripheral circuits respectively. The input terminal of the voltage regulator circuit can be equipped with a zero-crossing detection circuit to detect changes in the input power supply. The two auxiliary microcontrollers are powered by two separate high-voltage side voltage regulator circuits, and communicate with the main microcontroller via optocoupler-isolated serial ports.

[0076] In this embodiment, the signal control circuit further includes:

[0077] A memory, which is connected to the main processing unit, and at least one memory is provided;

[0078] A wireless communication module is provided, which is connected to the main processing unit, and at least one wireless communication module is provided.

[0079] A wired communication module is provided, which is connected to the main processing unit, and at least one wired communication module is provided.

[0080] A temperature and humidity sensor is provided, and the temperature and humidity sensor is communicatively connected to the main processing unit.

[0081] like Figure 10 As shown, in this embodiment, the memory includes memory U38 and memory U39. Memory U38 is a large-capacity memory used to store functional data and work logs related to signal control functions; memory U39 is a small-capacity memory used to store device identity and verification information. The large-capacity memory refers to a memory with a capacity larger than the small-capacity memory. In this embodiment, the model of memory U38 is W25Q32, and the model of memory U39 is AT24CS02. Pins 2, 5, 6, and 1 of memory U38 are connected to pins 54, 53, 52, and 51 of microcontroller U31, respectively.

[0082] In this embodiment, the wireless communication module includes one 4G module and two LoRa modules. The 4G module is used to wirelessly access the server to realize business communication and device management, while the LoRa modules are used for wireless expansion and cascading of devices, wireless terminal connection, and other functions.

[0083] like Figure 11 As shown, the 4G module includes a 4G chip M1, the model of which is WH-GM800T, and the 4G chip M1 is communicatively connected to the microcontroller U31.

[0084] like Figure 12 As shown, one LoRa module includes a LoRa chip M2, model WH-GM800T, which is communicatively connected to the microcontroller U31. The other LoRa module includes a LoRa chip M3, model E220-400MM22S, which is also communicatively connected to the microcontroller U31. Specifically, the connection methods of the 4G chip M1, LoRa chip M2, and LoRa chip M3 with the microcontroller U31 are existing technologies and will not be elaborated upon in this application.

[0085] In this embodiment, the wired communication module includes one Ethernet port, one RS232 serial port, two RS485 serial ports, and two digital input serial ports. The Ethernet port is used for connection between the controller and a remote server; the RS232 serial port is used for device debugging and connection to field serial devices; the RS485 serial ports are used for expansion cascading, connecting radar devices, and controlling countdown or multi-functional traffic lights; the digital input serial ports are used to connect to pedestrian crossing request buttons or bus priority control devices.

[0086] like Figure 13As shown, the Ethernet includes an Ethernet interface J11, which is an RJ45 interface, and the Ethernet interface J11 is communicatively connected to the microcontroller U31.

[0087] like Figure 14 As shown, the RS232 serial port includes an RS232 chip, the model of which is MAX232, and the RS232 chip is connected to the microcontroller U31 for communication.

[0088] like Figure 15 As shown, the RS485 serial port includes an RS485 chip. In this embodiment, two RS485 chips are provided, namely RS485 chip U5 and RS485 chip U29. The RS232 chip is model MAX232. The two RS232 chips are respectively connected to the microcontroller U31 for communication. Specifically, the circuit of the RS485 serial port and the connection between the RS232 chip and the microcontroller U31 are existing technologies and will not be described in detail in this application.

[0089] like Figure 16 As shown, the digital input serial port includes a MOSFET Q2 and a transistor Q1. The first terminal of the MOSFET Q2 is connected to the pedestrian crossing button, the second terminal is grounded, and the third terminal is connected to the first terminal of the transistor Q1 via a resistor. The second terminal of the MOSFET Q2 is connected to a power supply, and the third terminal is connected to the microcontroller U31 via an optocoupler.

[0090] The temperature and humidity sensor is used to detect the working environment of the equipment, and can issue an abnormal warning in a timely manner if the operating range is exceeded.

[0091] like Figure 17 As shown, in this embodiment, the temperature and humidity sensor includes a temperature and humidity sensor chip U21, the model of which is AHT30, and the temperature and humidity sensor chip U21 is communicatively connected to the microcontroller U31.

[0092] In this embodiment, the signal control circuit further includes:

[0093] An intersection simulation indicator unit is connected to the main processing unit.

[0094] like Figure 18As shown, in this embodiment, the intersection simulation indicator unit includes a 6-digit digital tube D26, a 4×5 dual-color LED, and a display scanning chip U7. The digital tube is used to display the device's operating status code, and the dual-color LED is used to display the actual operating status of the intersection signal. The display scanning chip U7 is a TM1640, and it is communicatively connected to the microcontroller U31. The display scanning chip U7 is electrically connected to both the dual-color LED and the digital tube D26, and the dual-color LED is electrically connected to the digital tube D26.

[0095] A signal controller includes a circuit board, an interface, and a housing. The circuit board has a signal control circuit connected to the electrical interface, which is located within the housing. The circuit board is housed within the housing. Specifically, the configuration of the circuit board, interface, and housing is prior art and will not be elaborated further in this application.

[0096] This invention provides a signal control circuit and a signal controller, which are simple in structure, easy to use, and highly reliable.

[0097] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

Claims

1. A signal control circuit, characterized in that, include: Main processing unit; An auxiliary detection unit, the output of which is communicatively connected to the main processing unit, and the input of which is electrically connected to a voltage detection circuit and / or a circuit detection circuit; A thyristor unit, the input of which is communicatively connected to the main processing unit, and the output of which is used to connect to an indicator light.

2. The signal control circuit according to claim 1, characterized in that, The auxiliary detection unit includes: A voltage detection unit, the output of which is connected to the main processing unit, and the input of which is connected to the voltage detection circuit; A current detection unit, the output of which is connected to the main processing unit, and the input of which is connected to the current detection circuit.

3. The signal control circuit according to claim 2, characterized in that, The voltage detection unit includes a microcontroller, the positive power pin of which is connected to the output terminal of a voltage regulator chip; the input terminal of the voltage regulator chip is used to connect to the live wire of the AC power supply, and the ground terminal is used to connect to the neutral wire of the AC power supply.

4. The signal control circuit according to claim 3, characterized in that, The current detection unit includes a microcontroller, the positive power pin of which is connected to the output terminal of a voltage regulator chip; the input terminal of the voltage regulator chip is used to connect to the neutral wire of the AC power supply, and the grounding terminal is used to connect to the live wire of the AC power supply.

5. The signal control circuit according to any one of claims 2-4, characterized in that, The ADC pin of the voltage detection unit is connected to the current detection input test point, and the ADC pin of the voltage detection unit is connected to the voltage detection input test point.

6. The signal control circuit according to claim 5, characterized in that, The voltage detection unit is connected to the main processing unit via an optocoupler, and the current detection unit is also connected to the main processing unit via an optocoupler.

7. The signal control circuit according to claim 6, characterized in that, The signal control circuit also includes a voltage regulator circuit, which includes a transformer, a rectifier bridge, a voltage regulator chip U3, a voltage regulator chip U32, and a voltage regulator chip U28. One side of the transformer is connected to AC power, and the other side is connected to the input terminals of voltage regulator chips U3 and U32 respectively. Voltage regulator chip U3 outputs a 4V voltage, and voltage regulator chip U32 outputs a 5V voltage. The output terminal of voltage regulator chip U3 is also connected to the input terminal of voltage regulator chip U28, and the output terminal of voltage regulator chip U28 outputs a 3.3V voltage.

8. The signal control circuit according to claim 7, characterized in that, The signal control circuit also includes: A memory, which is connected to the main processing unit, and at least one memory is provided; A wireless communication module is provided, which is connected to the main processing unit, and at least one wireless communication module is provided. A wired communication module is provided, which is connected to the main processing unit, and at least one wired communication module is provided. A temperature and humidity sensor is provided, and the temperature and humidity sensor is communicatively connected to the main processing unit.

9. The signal control circuit according to any one of claims 6-8, characterized in that, The signal control circuit also includes an intersection simulation indicator unit, which includes a digital tube, a dual-color LED, and a display scanning chip. The display scanning chip is communicatively connected to the main processing unit. The display scanning chip is electrically connected to the dual-color LED and the digital tube, respectively. The dual-color LED is electrically connected to the digital tube.

10. A signal controller, characterized in that, Includes the signal control circuit as described in any one of claims 1-9.

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