Electrical fire signal collector device

Abstract

The utility model discloses an electrical fire signal collector device, and belongs to the technical field of signal collection. The utility model comprises a data input / output interface circuit; the data input and output interface circuit comprises a three-phase voltage signal collector, a three-phase current signal collector, a leakage current signal collector, a temperature signal collector and a core microprocessor. The three-phase voltage signal collector, the three-phase current signal collector, the leakage current signal collector and the temperature signal collector are all connected with the core microprocessor and external power distribution equipment, and after the core microprocessor receives an information collection instruction, signals of the external power distribution equipment are collected; and the collected signals are transmitted to the core microprocessor, and the core microprocessor outputs the collected signals to the outside. According to the utility model, a general data transmission protocol is applied, the data real-time performance is good, the reliability is high, the size is small, the replacement is convenient, and the device can be applied to the intelligent remote data acquisition process.

Description

TECHNICAL FIELD

[0001] The utility model relates to signal collection technical field, and more particularly, relate to a kind of electrical fire signal collector device. BACKGROUND

[0002] In the field of digital information, many occasions need data collection and transmission, and there is a requirement for good communication real-time, high accuracy, otherwise it will affect the monitoring performance, and even cause control ability to decline. SUMMARY

[0003] The utility model discloses to realize the collection and transmission of the operating parameter of construction site distribution system, especially the collection of fire data, and proposes an electrical fire signal collector device, comprising: data input output interface circuit;

[0004] The data input output interface circuit comprises: three-phase voltage signal collector, three-phase current signal collector, leakage current signal collector, temperature signal collector and core microprocessor, the three-phase voltage signal collector, three-phase current signal collector, leakage current signal collector, temperature signal collector are connected with the core microprocessor and external distribution equipment, when the core microprocessor receives information collection instruction, controls the three-phase voltage signal collector, three-phase current signal collector, leakage current signal collector and temperature signal collector, collects the three-phase voltage signal, three-phase current signal, leakage current signal and temperature signal of external distribution equipment, and transmits the signal collected to core microprocessor, and the core microprocessor exports the signal collected.

[0005] Optionally, the electrical fire signal collector device further comprises: control power supply circuit, and the control power supply circuit is used to power supply data input output interface circuit.

[0006] Optionally, the control power supply circuit inputs DC12V direct current voltage, and after filtering, DC / DC conversion module of control power supply circuit is accessed, and the DC / DC conversion module is used to convert 12V direct current voltage into multistage voltage below 5V.

[0007] Optionally, the power supply voltage of control power supply circuit is 3.3V, and STM series single-chip microcomputer is used.

[0008] Optionally, the electrical fire signal collector device further comprises: LED indicator, and the LED indicator is used to indicate the operating state of external distribution equipment.

[0009] Among them, external equipment determines the operating state of external distribution equipment in real time according to fire signal, and the operating state determined in real time is fed back to LED indicator, and LED indicator displays according to the operating state of implementation feedback.

[0010] Optionally, the LED indicator light is connected with external equipment through the USB interface and is debugged by using the external equipment.

[0011] Optionally, the three-phase voltage signal collector, the three-phase current signal collector and the leakage current signal collector all collect signals through the special integrated circuit.

[0012] The collected signals are converted into voltage signals by the sampling resistor, and the voltage signals are input into the A / D conversion pin of the special integrated circuit, and the voltage signals are converted into digital signals through data conversion.

[0013] The digital signals are transmitted to the core microprocessor.

[0014] Optionally, the three-phase voltage signal collector, the three-phase current signal collector, the leakage current signal collector and the temperature signal collector transmit data and signals to the core microprocessor through the RS485 interface.

[0015] Optionally, the core microprocessor communicates with external equipment through the serial communication protocol and transmits the collected parameters to the data controller.

[0016] Optionally, the electrical fire signal collector device further comprises an auxiliary circuit.

[0017] The GPIO pin of the core microprocessor is connected with the 4-bit 7-segment light-emitting diode and the 4-bit button of the auxiliary circuit, and the parameters of the electrical fire signal collector device are displayed and set by controlling the light-emitting diode and the button.

[0018] Compared with the prior art, the electrical fire signal collector device has the following beneficial effects:

[0019] The utility model provides a kind of electrical fire signal collector device, comprising: data input output interface circuit;The data input output interface circuit includes: three-phase voltage signal collector, three-phase current signal collector, leakage current signal collector, temperature signal collector and core microprocessor, the three-phase voltage signal collector, three-phase current signal collector, leakage current signal collector, temperature signal collector are connected with the core microprocessor and external distribution equipment, when the core microprocessor receives information collection instruction, control the three-phase voltage signal collector, three-phase current signal collector, leakage current signal collector and temperature signal collector, the three-phase voltage signal of external distribution equipment, three-phase current signal, leakage current signal and temperature signal are collected, and the signal transmission to core microprocessor is carried out to the collection, the signal collected is exported by the core microprocessor.The utility model application general data transmission protocol, data real-time is good, reliability is high, small volume is convenient to replace, can be applied to the collection process of data intelligent remote data. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is the structural diagram of the utility model device;

[0021] Figure 2 It is the power supply circuit diagram of the utility model device;

[0022] Figure 3 It is the three-phase current sampling circuit diagram of the utility model device;

[0023] Figure 4 It is the three-phase voltage sampling circuit diagram of the utility model device;

[0024] Figure 5 It is the temperature signal collection circuit diagram of the utility model device;

[0025] Figure 6 It is the leakage current input circuit diagram of the utility model device;

[0026] Figure 7 It is the digital quantity input circuit diagram of the utility model device;

[0027] Figure 8 It is the digital quantity output circuit diagram of the utility model device. DETAILED DESCRIPTION

[0028] Exemplary embodiments of the present invention will now be described with reference to the accompanying drawings. However, the present invention may be embodied in many different forms and is not limited to the embodiments described herein. These embodiments are provided to fully and completely disclose the present invention and to fully convey its scope to those skilled in the art. The terminology used in the exemplary embodiments illustrated in the drawings is not intended to limit the present invention. In the drawings, the same units / elements are referred to by the same reference numerals.

[0029] Unless otherwise stated, the terms used herein (including technical terms) have their common meaning as understood by one of ordinary skill in the art. Furthermore, it is understood that terms defined in commonly used dictionaries should be understood to have a meaning consistent with the context of their relevant field, and not to be interpreted as having an idealized or overly formal meaning.

[0030] This utility model proposes an electrical fire signal acquisition device, such as... Figure 1 As shown, it includes: data input / output interface circuit;

[0031] The data input / output interface circuit includes: a three-phase voltage signal acquisition unit, a three-phase current signal acquisition unit, a leakage current signal acquisition unit, a temperature signal acquisition unit, and a core microprocessor. The three-phase voltage signal acquisition unit, the three-phase current signal acquisition unit, the leakage current signal acquisition unit, and the temperature signal acquisition unit are all connected to the core microprocessor and external power distribution equipment. When the core microprocessor receives an information acquisition command, it controls the three-phase voltage signal acquisition unit, the three-phase current signal acquisition unit, the leakage current signal acquisition unit, and the temperature signal acquisition unit to acquire the three-phase voltage signal, the three-phase current signal, the leakage current signal, and the temperature signal from the external power distribution equipment, and transmits the acquired signals to the core microprocessor. The core microprocessor then outputs the acquired signals to the outside.

[0032] The electrical fire signal acquisition device also includes a control power supply circuit, which is used to supply power to the data input / output interface circuit.

[0033] The control power supply circuit receives a DC 12V input voltage, which is then filtered and connected to the DC / DC converter module of the control power supply circuit. The DC / DC converter module converts the 12V DC voltage into multiple voltage levels below 5V.

[0034] The power supply circuit for control operates at 3.3V and is constructed using an STM series microcontroller.

[0035] The electrical fire signal acquisition device also includes an LED indicator light, which is used to indicate the operating status of external power distribution equipment.

[0036] The external device determines the running state of the external power distribution device in real time according to the fire signal, and feeds back the real-time determined running state to the LED indicator light.

[0037] The LED indicator light is connected with the external device through the USB interface and is debugged by using the external device.

[0038] The three-phase voltage signal collector, the three-phase current signal collector and the leakage current signal collector all collect signals through a special integrated circuit.

[0039] The collected signals are converted into voltage signals by a sampling resistor, and the voltage signals are input to the A / D conversion pin of the special integrated circuit, and the voltage signals are converted into digital signals through data conversion.

[0040] The digital signals are transmitted to the core microprocessor.

[0041] The three-phase voltage signal collector, the three-phase current signal collector, the leakage current signal collector and the temperature signal collector transmit data and signals to the core microprocessor through the RS485 interface.

[0042] The core microprocessor communicates with the external device through a serial communication protocol and transmits the collected parameters to the data controller.

[0043] The electrical fire signal collector device further comprises an auxiliary circuit.

[0044] The GPIO pin of the core microprocessor is connected with the 4-bit 7-segment light-emitting diode and the 4-bit button of the auxiliary circuit, and the parameters of the electrical fire signal collector device are displayed and set by controlling the light-emitting diode and the button.

[0045] The core microprocessor of the device is STM32F103, the microprocessor contains functions such as analog-to-digital conversion, serial communication of various protocols, general interface GPIO and corresponding pins. Through the analog-to-digital A / D conversion pin, the cable temperature and leakage current of the power distribution device are collected, the serial port SPI is applied to communicate with the integrated circuit RN703, the RN730 is a special three-phase current and three-phase voltage parameter collection integrated circuit, the three-phase current is collected through setting different current sensor transformation ratios, the three-phase voltage is directly connected to the chip pin, and the obtained three-phase current and three-phase voltage signals are transmitted to the main microprocessor STM32F103 through the SPI protocol. The digital switching quantity signal is detected through the general GPIO pin, and the general GPIO pin can also output a signal to control the external relay coil, and the passive dry node signal is output through the relay contact. The GPIO pin is connected to the nixie tube and the key to set various parameters, and displays various parameter information collected. The Modbus RTU communication protocol is programmed to connect external devices, such as a data controller DTU, to transmit data to a remote platform. The USB interface is connected to the monitoring software, and the software can set the running parameters of the device and monitor the running state of the device in real time. The data transmission is simple and reliable, the components are few, the device is small in size, easy to install and wire, and convenient to use.

[0046] The control power supply circuit is shown in Figure 2 The input DC12V direct current voltage is connected to the DC / DC conversion module through the circuit and the inductor filter, and the 12V voltage is converted into 5V voltage, the inductor and capacitor circuit are connected to stabilize the voltage and reduce the ripple effect. The 5V voltage generates a DC3.3V voltage through the voltage stabilizing circuit ASM1117, and at the same time, the 5V voltage is connected to the three-terminal adjustable shunt reference voltage source TL431 with stable heat, the reference voltage is 2.5V, and according to the circuit in the figure, the reference voltage of 2.5V is output, which provides a reference voltage for A / D conversion. The circuit forms multi-level power supply voltages of 5V, 3.3V and 2.5V, and provides power supply for various different components and functional circuits.

[0047] The data input and output interface circuit is shown in Figure 1 The data collected by the device is the main parameters of the power distribution device, such as three-phase voltage, three-phase current, leakage current, temperature and other digital switching quantities. The three-phase voltage and three-phase current signals complete data collection through the special integrated circuit RN7302, the three-phase current is converted into a small current through the current transformer after isolation, and then converted into a voltage signal through the sampling resistor, and input to the A / D conversion pin of the RN7302, and converted into a digital signal through analog-to-digital conversion. The current sampling circuit is shown in Figure 3As shown, the figure is the sampling circuit of phase A current, IA-29, IAN28 is connected to two mutual inductor coils, through the sampling circuit and filter circuit, and is connected to RN7302. In application, IAN-28 is connected to 0V, and the voltage at IAP end is shown as follows.

[0048] U a = I x R22 = 2.2I

[0049] In the formula, I is the secondary current of the mutual inductor, the resistance value of the resistor R22 is 2.2Ω, and Ua is the voltage value input to RN7302. The voltage sampling circuit is shown as follows. Figure 4 As shown, Ua-30 is the A-phase voltage of three-phase voltage, and Un-28 is the N-phase. In application, Un-28 is directly connected to 0V, and the A-phase voltage is divided by R16, R19 and R21, as shown in the following formula.

[0050]

[0051] Va is the voltage after voltage division, UA is the A-phase voltage value, and R21, R19 and R16 are voltage division resistors. The voltage after voltage division is connected to the AD conversion corresponding pin of RN7302 after being filtered by a capacitor. RN7302 is a special integrated circuit for three-phase voltage and current acquisition, and is connected according to the sequence of each phase. The data acquisition is completed by the hardware system of RN7302, and the active power, reactive power, apparent power, power factor and electric quantity of the power distribution system are calculated according to the data of three-phase current, three-phase voltage and mutual inductor transformation ratio, and are transmitted to the microprocessor STM32F103 through the SPI serial port. The microprocessor STM32F103 is responsible for collecting external temperature signals, leakage current and digital switching signals, and outputs switching signals. The temperature sampling circuit is shown as follows. Figure 5 As shown, the temperature sensor used is a thermistor temperature sensor, and the resistance changes with temperature in a negative temperature coefficient, and the measurement range is -30℃-105℃. The voltage value of the temperature signal is shown in the following formula.

[0052]

[0053] In the formula, UT is the voltage signal converted by temperature, R is the resistance value of the temperature measuring resistor, and R49 and R51 are voltage division resistors. The leakage current sampling circuit is shown as follows. Figure 6 The leakage current sampling circuit is the same as the three-phase current sampling circuit. The secondary current of the leakage current mutual inductor is converted into a voltage signal through a sampling resistor, and then is converted into a digital signal by the microprocessor. The digital input signal is shown as follows. Figure 7 After optical coupling isolation, the digital input signal is input to the general GPIO pin of the microprocessor. The digital output signal is shown as follows. Figure 8 The digital output signal is output from the general GPIO pin of the microprocessor through the transistor control relay coil, and the normally open contact of the relay outputs the passive node signal.

[0054] Data communication, the microprocessor STM32F103 will collect the data parameters through the serial communication protocol Modbus RTU protocol, and MAX carries out the interface level conversion to the RS485 interface and communicates with the external equipment, and transmits the collected parameters to the data controller DTU or other equipment such as PLC etc.

[0055] Auxiliary circuit, the device is connected with 4-bit 7-segment light emitting diode and 4-bit key through the GPIO pin of microprocessor STMF103 to display parameters and set, and the field parameters can be displayed in real time. Different parameters can be selected and displayed through the key operation, and the parameters of the serial communication protocol and the transformer ratio can also be set. A USB interface is arranged, the device can be connected to a computer through a USB interface cable, the running state of the device can be detected through the computer interface, the parameters of the device can be visually read, and the parameters can be set and modified.

[0056] The utility model discloses the optimization improvement in the data acquisition, transmission and control mode aspect, can carry out remote monitoring and operation to the field power distribution equipment, and the field operation parameter is gathered transmission to the remote end, and accepts the remote control platform and the transmission, and the local data is transmitted to the cloud platform, and obtains the instruction parameter of cloud platform issue, and executes the operation of instruction and carries out circuit breaker trip, and the trip adopts the pulse mode. The special problem of current power distribution system fire detection data acquisition is solved, and the cost is saved.

[0057] The utility model discloses through Modbus RTU communication protocol, 458 interface and numerical control controller communication, and the field data is transmitted. The output instruction signal is the pulse signal of passive electric shock, and can carry out circuit breaker trip operation.

[0058] Compared with the prior art, the data acquisition and transmission method is simple, application standard communication protocol can be connected with various acquisition devices, reliable performance, less components, small size, long service life. In the field of digital intelligence, it is simple and convenient to use, and the wiring is less, the installation is simple, and the device is convenient to replace. The data instruction output adopts the pulse signal, which can prevent the tripping coil from being damaged by continuous power supply after the tripping operation is completed.

Claims

1. An electrical fire signal acquisition device, characterized in that, include: Data input / output interface circuit; The data input / output interface circuit includes: a three-phase voltage signal acquisition unit, a three-phase current signal acquisition unit, a leakage current signal acquisition unit, a temperature signal acquisition unit, and a core microprocessor. The three-phase voltage signal acquisition unit, the three-phase current signal acquisition unit, the leakage current signal acquisition unit, and the temperature signal acquisition unit are all connected to the core microprocessor and external power distribution equipment. When the core microprocessor receives an information acquisition command, it controls the three-phase voltage signal acquisition unit, the three-phase current signal acquisition unit, the leakage current signal acquisition unit, and the temperature signal acquisition unit to acquire the three-phase voltage signal, the three-phase current signal, the leakage current signal, and the temperature signal from the external power distribution equipment, and transmits the acquired signals to the core microprocessor. The core microprocessor then outputs the acquired signals to the outside.

2. The electrical fire signal acquisition device according to claim 1, characterized in that, Also includes: A control power supply circuit is provided to supply power to the data input / output interface circuit.

3. The electrical fire signal acquisition device according to claim 2, characterized in that, The control power supply circuit receives a DC 12V input voltage, which is then filtered and connected to the DC / DC converter module of the control power supply circuit. The DC / DC converter module converts the 12V DC voltage into multiple voltage levels below 5V.

4. The electrical fire signal acquisition device according to claim 2, characterized in that, The power supply voltage of the control power supply circuit is 3.3V, and it is constructed using an STM series microcontroller.

5. The electrical fire signal acquisition device according to claim 1, characterized in that, Also includes: LED indicator lights are used to indicate the operating status of external power distribution equipment; The external equipment determines the operating status of the external power distribution equipment in real time based on the fire signal and feeds back the real-time operating status to the LED indicator. The LED indicator displays the operating status based on the feedback.

6. The electrical fire signal acquisition device according to claim 5, characterized in that, The LED indicator light is connected to an external device via a USB interface and is used for debugging.

7. The electrical fire signal acquisition device according to claim 1, characterized in that, The three-phase voltage signal acquisition device, the three-phase current signal acquisition device, and the leakage current signal acquisition device all acquire signals through dedicated integrated circuits; The process involves converting the acquired signal into a voltage signal using a sampling resistor, then inputting the voltage signal to the A / D conversion pin of a dedicated integrated circuit. After data conversion, the voltage signal is converted into a digital signal. Digital signals are transmitted to the core microprocessor.

8. The electrical fire signal acquisition device according to claim 1, characterized in that, The three-phase voltage signal acquisition device, three-phase current signal acquisition device, leakage current signal acquisition device, and temperature signal acquisition device transmit data and signals to the core microprocessor through an RS485 interface.

9. The electrical fire signal acquisition device according to claim 1, characterized in that, The core microprocessor communicates the collected data parameters with external devices via a serial communication protocol and transmits the collected parameters to the data controller.

10. The electrical fire signal acquisition device according to claim 1, characterized in that, include: Auxiliary circuit; The GPIO pins of the core microprocessor are connected to four 7-segment LEDs and four buttons in the auxiliary circuit. By controlling the LEDs and buttons, the parameters of the electrical fire signal acquisition device can be displayed and set.

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