CN112816776A - Signal machine load fault detection device and method based on electric energy metering technology - Google Patents
Signal machine load fault detection device and method based on electric energy metering technology Download PDFInfo
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- G08G1/095—Traffic lights
Abstract
The invention discloses a signaler load fault detection device and a method based on an electric energy metering technology, wherein the device comprises a main control unit, an electric energy metering unit, a data transmission unit, a fault indication unit and a drive output unit, the electric energy metering unit is provided with a single-phase electric energy metering chip or a three-phase electric energy metering chip, each red, yellow or green signal lamp unit corresponds to a detection mode of the single-phase electric energy metering chip, or each red, yellow and green signal lamp group corresponds to the three-phase electric energy metering chip, and the working state of a signaler load is judged through a numerical comparison result of an electric energy information fault threshold value obtained by self-learning and a currently obtained electric energy information value. The device and the method can effectively solve the problems that the current domestic signal machine has low precision of the detection result of the load, is easy to be interfered, and can not timely judge the operation correctness and the fault reason of the system.
Description
Technical Field
The invention belongs to the technical field of intelligent traffic, and relates to a signal machine load fault detection device, in particular to a signal machine load fault detection device and method based on an electric energy metering technology.
Background
With the advance of the modernization process of the country, the urban road burden as an economic blood vessel is continuously increased, the quantity of motor vehicles and non-motor vehicles is continuously increased, the urban traffic trip pressure is increased suddenly, and disastrous consequences caused by frequent traffic accidents are serious social problems. People have to pay high attention to the problem of road traffic safety, and research a new scientific and technological product to protect driving for traffic safety.
At present, a signal machine for domestic use outputs a control signal to intersection equipment for driving various traffic signals such as signal lamps and countdown timers to control load units. The load units work outdoors, the abnormal working condition is inevitably caused by the influence of physical environment and electrical environment, most of signal machines have no fault detection and transmission function to the load units, a small number of manufacturers can only detect the IO amount of a certain channel, the detection precision is low, the interference is easy to cause, and the system operation correctness and the fault reason can not be predicted, so that the road traffic control unit and the load units are difficult to find in time by users after being damaged, the field maintenance, the troubleshooting and the processing are difficult, and traffic accidents are very easy to cause.
Disclosure of Invention
The invention aims to solve the technical problem of the prior art and provides a signal machine load fault detection device which is reasonable in design and has high detection rate and is based on an electric energy metering technology.
Another technical problem to be solved by the present invention is to provide a method for detecting a load fault of a traffic signal by using the above mentioned device for detecting a load fault of a traffic signal based on an electric energy metering technology, in order to overcome the disadvantages of the prior art.
In order to achieve the purpose, the invention adopts the following technical scheme:
the device comprises a main control unit, an electric energy metering unit, a data transmission unit, a fault indication unit and a drive output unit, wherein the main control unit is connected with the units, sends a control instruction and receives return information, and the drive output unit is connected with a signal machine load;
the electric energy metering unit detects electric energy information loaded by the multi-channel annunciator and sends an electric energy information value to the main control unit;
the data transmission unit transmits different types of message information to the outside;
the fault indicating unit indicates working fault information or working normal state information;
the driving output unit receives the command of the main control unit and drives the signal machine load to work according to the command;
and the main control unit is used for acquiring the electric energy information value, transmitting message information of different types, controlling the on and off of the indicator light, and judging the working state of the load of the annunciator according to the numerical comparison result of the electric energy information fault threshold acquired by self learning and the currently acquired electric energy information value.
The technical problem to be solved by the invention can also be solved by the following technical scheme that the main control unit is connected with the electric energy metering unit through an SPI bus, the main control unit is connected with the data transmission unit through a UART serial port, and the main control unit is connected with the fault indication unit through an I/O port.
The technical problem to be solved by the invention can also be solved by the following technical scheme that the electric energy metering unit comprises an electric energy metering chip and a peripheral circuit thereof.
The technical problem to be solved by the invention can also be solved by adopting the following technical scheme that the electric energy metering chip is a single-phase electric energy metering chip, and the sampling end of the single-phase electric energy metering chip is respectively connected with a red or yellow or green signal lamp unit through a mutual inductor isolation type circuit;
the mutual inductor isolated circuit is composed of a current mutual inductor and a voltage mutual inductor which are connected in parallel on the circuit, the front-end current mutual inductor and the voltage mutual inductor transmit converted small current and small voltage signals to the sampling end of the electric energy metering chip, the single-phase electric energy metering chip calculates an electric energy information value through an internal algorithm, and then electric energy information is transmitted through the SPI bus and the main control unit.
The technical problem to be solved by the invention can be also realized by the following technical scheme that the electric energy metering chip is a three-phase electric energy metering chip which simultaneously collects the electric energy information of three signal lamp units, and the sampling end of the three-phase electric energy metering chip is connected with each red, yellow and green signal lamp set through a non-isolated series-in circuit;
the non-isolated series-in circuit consists of a current transformer and a voltage sampling circuit which are connected in parallel on the circuit, the voltage sampling circuit adopts a resistor series voltage division mode,
the front-end mutual inductor and the voltage sampling circuit transmit the converted small current and small voltage signals to the sampling end of the electric energy metering chip, and the three-phase electric energy metering chip calculates an electric energy information value through an internal algorithm and then transmits the electric energy information through the SPI bus and the main control unit.
The technical problem to be solved by the invention can also be realized by the following technical scheme that the voltage sampling circuit is formed by connecting 6 chip type packaging resistors in series.
The technical problem to be solved by the invention can also be solved by the following technical scheme that the electric energy metering chip is composed of a plurality of three-phase electric energy metering chips and a plurality of single-phase electric energy metering chips, a red light unit or a green light unit of each signal lamp group respectively reads single-channel electric energy information through the single-phase electric energy metering chips, and each red-yellow-green signal lamp group reads three-channel electric energy information simultaneously by using one three-phase electric energy metering chip.
The technical problem to be solved by the invention can also be realized by the following technical scheme that the data transmission unit consists of a 485 isolation communication chip ADM2587EBRWZ and a peripheral circuit thereof;
the fault indication unit consists of a circuit board LED indicator light and a peripheral circuit thereof;
the driving output unit consists of controllable silicon BT139X-600E and peripheral circuits thereof.
A method for using the annunciator load fault detection device to detect the annunciator load fault is characterized in that the method is to judge the working state of the annunciator load through the numerical comparison result of the electric energy information fault threshold value obtained by self-learning of the main control unit and the electric energy information value obtained currently; if the current acquired electric energy information value is larger than the fault threshold value, judging that the current signal machine load is in a normal working state; and if the current acquired electric energy information value is smaller than or equal to the fault threshold value, judging that the current signal machine load is in a working fault state.
The technical problem to be solved by the invention can also be realized by the following technical scheme, the method comprises the following specific steps,
(1) the main control unit receives a control command sent by the annunciator and controls the driving output unit to work;
(2) the main control unit controls the electric energy metering unit to start an electric energy metering function and reads an electric energy information value, wherein the electric energy information comprises a voltage effective value, a current effective value, an active power value, a reactive power value, an apparent power value and the like;
(3) the main control unit reads the internally stored learning completion flag word, if the flag word is 0, the self-learning is not completed, and if the flag word is 1, the self-learning is completed;
(4) if the self-learning is not finished, entering a self-learning mode, wherein the self-learning mode is that the electric energy information values of the current signal lamp states are acquired once every 20ms, after 100 electric energy information values are acquired in total for 2s, summing and averaging are carried out, 50% of the values are used as fault thresholds of the electric energy information, and after the self-learning of the electric energy information fault thresholds of each lamp state is finished, a self-learning completion flag word is set to be 1;
(5) if the self-learning is finished, reading a fault threshold value of the electric energy information, and comparing the fault threshold value with a current acquired electric energy information value, if the current electric energy information value is larger than the fault threshold value, the main control unit controls the data transmission unit to transmit a normal working message, controls the fault indication unit to extinguish a fault indicator lamp and lights a normal working indicator lamp;
if the current electric energy information value is smaller than or equal to the fault threshold value, the main control unit controls the data transmission unit to transmit a working fault message, controls the fault indication unit to light a fault indication lamp and extinguish a working normal indication lamp.
Compared with the prior art, the working state of the annunciator load is judged by setting the main control unit and the electric energy metering unit provided with the three-phase electric energy metering chip and the single-phase electric energy metering chip and comparing the self-learning acquired electric energy information fault threshold value with the currently acquired electric energy information value, so that the annunciator has an automatic fault detection and transmission function on the load unit, and the detection precision is improved; sampling circuit among each electric energy metering unit adopts mutual-inductor isolated design or non-isolated cluster to go into the formula design, and the mode of carrying out strong and weak electric isolation conversion through using high accuracy current transformer and high accuracy voltage transformer samples, or the mode of resistance string partial pressure samples, has effectively avoided receiving the interference, guarantees the exactness of system operation and makes the prediction to the fault reason for the user can in time discover the problem, has reduced the on-the-spot maintenance investigation and has handled the degree of difficulty, thereby has guaranteed that the traffic is unobstructed.
Drawings
Fig. 1 is a block diagram of a signal machine load fault detection device based on an electric energy metering technology according to the present invention;
fig. 2 is a schematic block diagram of a single-phase electric energy metering chip adopted in the signal load fault detection device of the present invention;
FIG. 3 is a schematic block diagram of a three-phase electric energy metering chip adopted in the annunciator load fault detection device of the present invention;
fig. 4 is a schematic block diagram of a single-phase electric energy metering chip and a three-phase electric energy metering chip in the semaphore load fault detection device of the present invention;
fig. 5 is a flowchart of the operation of the method for detecting a load fault of a signaler according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Referring to fig. 1, the annunciator load fault detection device based on the electric energy metering technology is composed of a main control unit, an electric energy metering unit, a data transmission unit, a fault indication unit, a drive output unit and the like.
The main control unit is a minimum system consisting of an STM32F series and peripheral circuits thereof. The master control unit is connected with the electric energy metering unit through an SPI bus and used for acquiring an electric energy information value; the main control unit is connected with the data transmission unit through a UART serial port and is used for transmitting message information of different types; and the main control unit is connected with the fault indicating unit through the I/O port and is used for controlling the on and off of the indicating lamp. And the main control unit receives a control command of the annunciator and controls the driving output unit to output the load control voltage.
And the electric energy metering unit consists of an electric energy metering chip, a peripheral circuit of the electric energy metering chip and a sampling circuit. Chip models include RN8302B, CS5463, ATT7022, FC7758, HLW8012, and the like. The power information detection device is used for detecting the power information of the load of the multi-channel annunciator and sending a power information value to the main control unit through the SPI bus. Because the type of electric energy metering chip is internally provided with a unique electric energy metering algorithm, the problems that the traditional current and voltage sampling circuit is large in data fluctuation and is easily influenced by the external environment can be effectively solved.
And the data transmission unit consists of a 485 isolation communication chip ADM2587EBRWZ and a peripheral circuit thereof. Used for transmitting different types of message information to the outside. The chip has the advantages of long transmission distance and strong anti-interference capability.
And the fault indicating unit consists of a circuit board LED indicating lamp and a peripheral circuit thereof. The information of the working fault or the working normal state is used for indicating the working fault information or the working normal state information.
And the driving output unit consists of controllable silicon BT139X-600E and peripheral circuits thereof. And the control unit is used for receiving the command of the main control unit and driving the signal machine load to work according to the command.
In embodiment 2, referring to fig. 2, in the signaling machine load fault detection device based on the electric energy metering technology described in embodiment 1, the front end of the electric energy metering unit adopts a transformer isolation type design for sampling, the rear end adopts a single-phase electric energy metering chip and a peripheral circuit thereof for metering electric energy information, and the current transformer is in a model of DL-CT1005A and is mainly responsible for converting a large-current signal into a small-current signal; the voltage transformer is in a model number of DL-PT202H1 and is mainly responsible for converting a large voltage signal into a small voltage signal; the model of the single-phase electric energy metering chip in this embodiment is CS5463, and the chip is responsible for metering electric energy information. The front-end mutual inductor transmits the converted low current and low voltage signals to a sampling end of an electric energy metering chip, and the electric energy metering chip calculates an electric energy information value through an internal algorithm and then transmits the electric energy information through an SPI bus and a main control unit.
In this embodiment, since the single-phase electric energy metering chip has only a single-channel electric energy metering function, 1 single-phase electric energy metering chip is required to be used for collecting electric energy information for the red light unit, the yellow light unit and the green light unit in each signal lamp light group in the traffic signal load.
Embodiment 3, referring to fig. 3, in the signaling machine load fault detection device based on the electric energy metering technology described in embodiment 1, the front end of the electric energy metering unit is designed in a non-isolated series-in manner, sampling is performed in a resistor string voltage division manner, and the rear end of the resistor string is connected to a three-phase electric energy metering chip and a peripheral circuit thereof to perform electric energy information metering;
the model of the current transformer in the embodiment is DL-CT1005A, which is mainly responsible for converting a large current signal into a small current signal, and the voltage sampling circuit adopts a traditional resistor string voltage division mode. The 6 chip resistors packaged by 1206 are adopted, so that the sum of the resistance value is about 1 mega ohm, and the amplitude of the finally output signal is about 100 mV. With the method, the cost can be reduced.
The model of the three-phase electric energy metering chip in this embodiment is RN8302B, and the chip is responsible for metering electric energy information. The front-end mutual inductor and the voltage sampling circuit transmit the converted small current and small voltage signals to the sampling end of the electric energy metering chip, and the electric energy metering chip calculates an electric energy information value through an internal algorithm and then transmits the electric energy information through the SPI bus and the main control unit.
Because the RN8302B electric energy metering chip can simultaneously perform electric energy information metering of three paths, for the red light unit, the yellow light unit and the green light unit in each signal lamp light group in the signal load, one three-phase electric energy metering chip can be used to simultaneously acquire electric energy information of three units.
In embodiment 4, referring to fig. 4, the signaler load fault detection device based on the electric energy metering technology in embodiment 1, the front end of the electric energy metering unit adopts a mutual inductor isolation type design for sampling, and the rear end adopts a single-phase electric energy metering chip and a peripheral circuit thereof, and a three-phase electric energy metering unit and a peripheral circuit thereof for metering electric energy information.
The model of the current transformer in the embodiment is DL-CT1005A, and the current transformer is mainly responsible for converting a large current signal into a small current signal.
The model of the voltage transformer in the embodiment is DL-PT202H1, and the voltage transformer is mainly responsible for converting a large voltage signal into a small voltage signal.
The model of the single-phase electric energy metering chip in the embodiment is CS5463, and the model of the three-phase electric energy metering chip is RN 8302B. The front-end mutual inductor transmits the converted low current and low voltage signals to a sampling end of an electric energy metering chip, and the electric energy metering chip calculates an electric energy information value through an internal algorithm and then transmits the electric energy information through an SPI bus and a main control unit.
In the present embodiment, a method in which a single-phase electric energy metering chip and a three-phase electric energy metering chip are shared is adopted. Because the signal lamp groups in part of the signal machine loads only have the red lamp units and the green lamp units, for the condition, each traffic signal lamp group adopts two single-phase electric energy metering chips and peripheral circuits thereof to collect electric energy information. And for each red, yellow and green signal lamp group, a three-phase electric energy metering chip and a peripheral circuit thereof are adopted to acquire electric energy information.
Embodiment 5, referring to fig. 5, a method for detecting a load fault of a traffic signal based on an electric energy metering technology, using the device for detecting a load fault of a traffic signal described in embodiments 1 to 4, includes the following steps:
(1) the main control unit receives a control command sent by the annunciator and controls the driving output unit to work;
(2) the main control unit controls the electric energy metering unit to start an electric energy metering function and reads an electric energy information value;
(3) the main control unit reads the learning completion flag word stored in the main control unit, if the flag word is 0, the self-learning is not completed, and if the flag word is 1, the self-learning is completed.
(4) And if the self-learning is not finished, entering a self-learning mode. And acquiring the electric energy information value of the current signal lamp state once every 20ms, summing and averaging after acquiring 100 electric energy information values in total for 2s, and taking 50% of the value as a fault threshold value of the electric energy information. And after the self-learning of the electric energy information fault threshold value of each lamp state is completed, setting the self-learning completion flag word to be 1.
(5) And if the self-learning is finished, reading the fault threshold value of the electric energy information, and comparing the fault threshold value with the currently acquired electric energy information value. If the current electric energy information value is larger than the fault threshold value, the main control unit controls the data transmission unit to transmit a normal working message, controls the fault indication unit to extinguish the fault indication lamp and lights the normal working indication lamp. If the current electric energy information value is smaller than or equal to the fault threshold value, the main control unit controls the data transmission unit to transmit a working fault message, controls the fault indication unit to light a fault indication lamp and extinguish a working normal indication lamp.
By adopting the signal machine load fault detection device based on the electric energy metering technology, in practical application, the accuracy of signal machine load fault detection can be improved, and the functions of judging fault reasons of signal machine loads and transmitting information are realized.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (10)
1. The utility model provides a semaphore load fault detection device based on electric energy measurement technique which characterized in that: the device comprises a main control unit, an electric energy metering unit, a data transmission unit, a fault indication unit and a drive output unit, wherein the main control unit is connected with the units, sends a control instruction and receives return information, and the drive output unit is connected with a signal machine load;
the electric energy metering unit detects electric energy information loaded by the multi-channel annunciator and sends an electric energy information value to the main control unit;
the data transmission unit transmits different types of message information to the outside;
the fault indicating unit indicates working fault information or working normal state information;
the driving output unit receives the command of the main control unit and drives the signal machine load to work according to the command;
and the main control unit is used for acquiring the electric energy information value, transmitting message information of different types, controlling the on and off of the indicator light, and judging the working state of the load of the annunciator according to the numerical comparison result of the electric energy information fault threshold acquired by self learning and the currently acquired electric energy information value.
2. The device of claim 1, wherein the main control unit is connected to the power metering unit through an SPI bus, the main control unit is connected to the data transmission unit through a UART serial port, and the main control unit is connected to the fault indication unit through an I/O port.
3. The semaphore load fault detection device based on electric energy metering technology according to claim 1 or 2, wherein the electric energy metering unit comprises an electric energy metering chip and peripheral circuits thereof.
4. The traffic signal load fault detection device based on the electric energy metering technology is characterized in that the electric energy metering chip is a single-phase electric energy metering chip, and a sampling end of the single-phase electric energy metering chip is respectively connected with a red or yellow or green signal lamp unit through a mutual inductor isolation type circuit;
the mutual inductor isolated circuit is composed of a current mutual inductor and a voltage mutual inductor which are connected in parallel, the front-end current mutual inductor and the voltage mutual inductor transmit converted small current and small voltage signals to the sampling end of the electric energy metering chip, the single-phase electric energy metering chip calculates an electric energy information value through an internal algorithm, and then electric energy information is transmitted through the SPI bus and the main control unit.
5. The traffic signal load fault detection device based on the electric energy metering technology is characterized in that the electric energy metering chip is a three-phase electric energy metering chip which simultaneously collects electric energy information of three signal lamp units, and a sampling end of the three-phase electric energy metering chip is connected with each red, yellow and green signal lamp set through a non-isolated series-in circuit;
the non-isolated series-in circuit consists of a current transformer and a voltage sampling circuit which are connected in parallel, the voltage sampling circuit adopts a resistor series voltage division mode,
the front-end mutual inductor and the voltage sampling circuit transmit the converted small current and small voltage signals to the sampling end of the electric energy metering chip, and the three-phase electric energy metering chip calculates an electric energy information value through an internal algorithm and then transmits the electric energy information through the SPI bus and the main control unit.
6. The signal machine load fault detection device based on the electric energy metering technology is characterized in that the voltage sampling circuit is formed by connecting 6 chip type packaging resistors in series.
7. The traffic signal load fault detection device based on the electric energy metering technology according to claim 3, wherein the electric energy metering chip is composed of a three-phase electric energy metering chip and a single-phase electric energy metering chip, the red light unit or the green light unit of each signal light group respectively reads single-channel electric energy information through the single-phase electric energy metering chip, and each red-yellow-green signal light group uses one three-phase electric energy metering chip to simultaneously read three-channel electric energy information.
8. The device for detecting the load fault of the annunciator based on the electric energy metering technology as claimed in claim 1, wherein the data transmission unit is composed of a 485 isolation communication chip ADM2587EBRWZ and peripheral circuits thereof;
the fault indication unit consists of a circuit board LED indicator light and a peripheral circuit thereof;
the driving output unit consists of controllable silicon BT139X-600E and peripheral circuits thereof.
9. A method for detecting a load fault of a signal using the load fault detection device of a signal according to any one of claims 1 to 8, wherein the method is to judge the working state of the signal load by comparing the value of the fault threshold of the self-learning obtained power information of the main control unit with the value of the currently obtained power information; if the current acquired electric energy information value is larger than the fault threshold value, judging that the current signal machine load is in a normal working state; and if the current acquired electric energy information value is smaller than or equal to the fault threshold value, judging that the current signal machine load is in a working fault state.
10. The method according to claim 9, characterized in that the method comprises the following specific steps,
(1) the main control unit receives a control command sent by the annunciator and controls the driving output unit to work;
(2) the main control unit controls the electric energy metering unit to start an electric energy metering function and reads an electric energy information value;
(3) the main control unit reads the internally stored learning completion flag word, if the flag word is 0, the self-learning is not completed, and if the flag word is 1, the self-learning is completed;
(4) if the self-learning is not finished, entering a self-learning mode, wherein the self-learning mode is that the electric energy information values of the current signal lamp states are acquired once every 20ms, after 100 electric energy information values are acquired in total for 2s, summing and averaging are carried out, 50% of the values are used as fault thresholds of the electric energy information, and after the self-learning of the electric energy information fault thresholds of each lamp state is finished, a self-learning completion flag word is set to be 1;
(5) if the self-learning is finished, reading a fault threshold value of the electric energy information, and comparing the fault threshold value with a current acquired electric energy information value, if the current electric energy information value is larger than the fault threshold value, the main control unit controls the data transmission unit to transmit a normal working message, controls the fault indication unit to extinguish a fault indicator lamp and lights a normal working indicator lamp;
if the current electric energy information value is smaller than or equal to the fault threshold value, the main control unit controls the data transmission unit to transmit a working fault message, controls the fault indication unit to light a fault indication lamp and extinguish a working normal indication lamp.
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| CN114441990A (en) * | 2021-12-23 | 2022-05-06 | 北京北大千方科技有限公司 | Electric leakage detection device and method for traffic signal machine |
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