CN220965065U - Circuit and device for collecting tunnel gas monitoring data - Google Patents

Abstract

The utility model provides a circuit and a device for collecting tunnel gas monitoring data, and relates to the field of gas monitoring. The circuit comprises a power supply module, a singlechip module, a network card module, an RS485 module and a transceiver isolation module, wherein the singlechip module, the network card module, the RS485 module and the transceiver isolation module are respectively connected with the power supply module, the singlechip module is also connected with the network card module, the RS485 module is connected with a sensor wiring terminal, and the sensor wiring terminal is used for being connected with a gas monitoring sensor which needs to be monitored. In the technical scheme, the sensor wiring terminal connected through the RS485 module is externally connected with one or more corresponding gas monitoring sensors, so that gas monitoring data can be acquired, and the acquired gas monitoring data can be remotely transmitted through the network card module, so that the gas monitoring information can be conveniently acquired and managed in a remote way.

Description

Circuit and device for collecting tunnel gas monitoring data

Technical Field

The utility model relates to the field of gas monitoring, in particular to a circuit and a device for collecting tunnel gas monitoring data.

Background

The tunnel is an engineering building embedded in the stratum, is a form of utilizing underground space by human beings, and often some harmful gases exist in the tunnel to hurt the human body of the past tunnel, and when the content of the harmful gases of oxygen, carbon monoxide, hydrogen sulfide and methane in the tunnel reaches 'abnormal', the human body cannot be perceived, so that the health of the human body is threatened in an intangible way. Therefore, it is necessary to monitor the ambient gas with the gas monitoring sensor in the tunnel.

However, most of data of the gas monitoring sensors are transmitted by using a wired information transmission technology, and only a single type of gas can be monitored, so that the gas monitoring information utilization rate is low, and the development of gas monitoring work in a tunnel is not facilitated.

Disclosure of utility model

In order to solve the above problems, the present utility model provides a circuit and a device for collecting tunnel gas monitoring data, which can collect different gas monitoring data, and is convenient for remote acquisition and management of gas monitoring information.

The utility model is realized in the following way:

In a first aspect, the application provides a circuit for collecting tunnel gas monitoring data, which comprises a power supply module, a singlechip module, a network card module, an RS485 module and a transceiver isolation module, wherein the singlechip module, the network card module, the RS485 module and the transceiver isolation module are respectively connected with the power supply module, the singlechip module is also connected with the network card module, the RS485 module is connected with a sensor wiring terminal, and the sensor wiring terminal is used for connecting a gas monitoring sensor to be monitored.

Further, based on the foregoing scheme, the power module includes a first voltage stabilizing circuit, a second voltage stabilizing circuit and a DC-DC isolation circuit, the first voltage stabilizing circuit is configured to stabilize an accessed direct current voltage to a first level, the second voltage stabilizing circuit is configured to stabilize a received first level to a second level, the RS485 module is connected to the first voltage stabilizing circuit through the DC-DC isolation circuit, the first voltage stabilizing circuit and the second voltage stabilizing circuit are both connected to the transceiver isolation module, and the single chip module and the network card module are both connected to the second voltage stabilizing circuit.

Further, based on the foregoing scheme, the power module includes a power management chip U6, a DC-DC isolation chip U7, a power regulation chip U3, a transient suppression diode D5, a transient suppression diode D6, a diode D4, a diode D8, a light emitting diode D9, a resistor R1, a resistor R33, a resistor R38, a resistor R39, a resistor R40, a capacitor C8, a capacitor C11, a capacitor C60, a capacitor C59, a capacitor C12, a capacitor C13, a capacitor C5, a capacitor C6, a capacitor C10, a capacitor C14, and an inductor L5 of MP4460DQ type. The pin VIN of the power management chip U6 is grounded through a capacitor C8, a capacitor C11 and a transient suppression diode D3 which are connected in parallel in pairs, the pin VIN of the power management chip U6 is also connected with the cathode of a diode D4, the anode of the diode D4 is connected with an external direct current power supply of +24, the pin FREQ of the power management chip U6 is grounded through a resistor R33, the pin COMP of the power management chip U6 is grounded through a capacitor C60 and a resistor R40 which are sequentially connected in series, the pin FB of the power management chip U6 is grounded through a resistor R39, the pin FB of the power management chip U6 is connected with the pin SW of the power management chip U6 through a resistor R38 and a resistor L5 which are sequentially connected in series, the pin SW of the power management chip U6 is connected with the pin BST of the power management chip U6 through a capacitor C59, the pin SW of the power management chip U6 is connected with the cathode of the diode D8, the anode of the diode D8 is grounded, the common end of the resistor R38 and the inductor L5 is grounded through a capacitor C12, a capacitor C13 and a transient suppression diode D5 which are connected in parallel in pairs, the common end of the resistor R38 and the inductor L5 is also used for outputting a direct current power supply VDD_5V0, the common end of the resistor R38 and the inductor L5 is connected with a pin VIN of the power supply voltage stabilizing chip U3, a pin VOUT of the power supply voltage stabilizing chip U3 is grounded through a capacitor C10, a capacitor C14 and a transient suppression diode D6 which are connected in parallel in pairs, a pin VOUT of the power supply voltage stabilizing chip U3 is also used for outputting a direct current power supply VDD_3V3, the common end of the resistor R38 and the inductor L5 is connected with a pin VIN of the DC-DC isolation chip U7, the pin VIN of the DC-DC isolation chip U7 is connected with a pin GND of the DC-DC isolation chip U7 through a capacitor C6, and a pin 0V of the DC-DC isolation chip U7 is connected with a +VO of the DC-DC isolation chip U7 through a capacitor C5.

Further, based on the foregoing scheme, the singlechip module includes singlechip chip U9, binding post row J3, resistance R19, electric capacity C55, electric capacity C15, electric capacity C16 and electric capacity C58 of STM32L051K8U6 model. Pin VDD of the single chip microcomputer chip U9 is connected with the direct current power supply vdd_3v3, pin VDD of the single chip microcomputer chip U9 is grounded through a capacitor C15, a capacitor C16 and a capacitor C58 which are connected in parallel in pairs, pin NRST of the single chip microcomputer chip U9 is connected with the direct current power supply vdd_3v3 through a resistor R19, pin NRST of the single chip microcomputer chip U9 is grounded through a capacitor C55, and terminals 1, 3 and 5 of the wiring terminal row J3 are connected with pins 24, 23 and 22 of the single chip microcomputer chip U9 respectively.

Further, based on the foregoing scheme, the network card module includes a PHY network card chip U10, a light emitting diode D7, a resistor R22, and a capacitor C9. Pin 3V3 of PHY network card chip U10 is grounded through electric capacity C9, and pin 3V3 of PHY network card chip U10 LINKs to each other with DC power supply VDD_3V3, and PHY network card chip U10's pin LED_LINK-LINKs to each other with emitting diode D7's negative pole, and emitting diode D7's positive pole LINKs to each other with DC power supply VDD_5V0 through resistance R22, and PHY network card chip U10's pin TXD LINKs to each other with singlechip chip U9's pin PA3, and PHY network card chip U10's pin RXD LINKs to each other with singlechip chip U9's pin PA 2.

Further, based on the foregoing scheme, the RS485 module includes a connection terminal block J2, an optocoupler U4, a transceiver chip U1 of the MAX13487EESA +t model, a transient suppression diode D1, a transient suppression diode D2, a resistor R5, a resistor R3, a resistor R6, a resistor R7, a resistor R13, a resistor R14, a resistor R15, a resistor R16, a resistor R17, a capacitor C1, a capacitor C2, a capacitor C3, and a capacitor C4. The pin AN of the optocoupler U2 is connected with a direct current power supply VDD_3V3 through a resistor R2, the pin VCC of the optocoupler U2 is connected with the pin +VO of the DC-DC isolation chip U7, the pin VCC of the optocoupler U2 is connected with the pin GND of the optocoupler U2 through a capacitor C2, the pin VCC of the optocoupler U2 is connected with the pin GND of the optocoupler U2 through a resistor R5, and the pin VO of the optocoupler U2 is connected with the pin DI of the transceiver chip U1. The pin VCC of the optocoupler U4 is grounded through a capacitor C3, the pin VCC of the optocoupler U4 is connected with the pin VO of the optocoupler U4 through a resistor R6, the pin VCC of the optocoupler U4 is connected with a direct current power supply VDD_3V3, the pin AN of the optocoupler U4 is connected with the pin +VO of a DC-DC isolation chip U7 through a resistor R3, and the pin CAT of the optocoupler U4 is connected with the pin RO of a transceiver chip U1. The pin DE of the transceiver chip U1 is grounded through a resistor R7 and a capacitor C4 which are sequentially connected in series, the common terminal of the resistor R7 and the capacitor C4 is connected with the pin +vo of the DC-DC isolation chip U7, the pin VCC of the transceiver chip U1 is connected with the pin +vo of the DC-DC isolation chip U7 through a resistor R14 and a transient suppression diode D1 which are sequentially connected in series, the pin VCC of the transceiver chip U1 is grounded through the capacitor C1, the pin VCC of the transceiver chip U1 is connected with the pin a of the transceiver chip U1 through a resistor R16, the pin a of the transceiver chip U1 is connected with the pin B of the transceiver chip U1 through a resistor R15 and a transient suppression diode D2 which are sequentially connected in series, the pin B of the transceiver chip U1 is connected with the external power supply +24 through a resistor R14 and a transient suppression diode D1 which are sequentially connected in series, the terminal 7 of the terminal row J2 is connected with the common terminal row of the resistor R14 and the transient suppression diode D2 which is connected with the common terminal row of the terminal J2.

Further, based on the foregoing scheme, the transceiver isolation module includes a transceiver isolation chip U8, a triode Q1, a triode Q2, a capacitor C7, a resistor R8, a resistor R10, a resistor R23, a resistor R24, a resistor R9, a resistor R11, a resistor R12, and a resistor R18 of RSM485M model. The base of the triode Q1 is connected with a direct current power supply VDD_3V3 through a resistor R8, the collector of the triode Q1 is connected with a pin VO of an optical coupler U4, the emitter of the triode Q1 is connected with a pin TXD of a transceiver isolation chip U8, the base of the triode Q2 is connected with the direct current power supply VDD_3V3 through a resistor R23, the base of the triode Q2 is connected with the emitter of the triode Q2 through a resistor R10, the emitter of the triode Q2 is connected with a pin CAT of the optical coupler U2, the collector of the triode Q2 is connected with a pin +VO of the DC-DC isolation chip U7 through a resistor R24, the collector of the triode Q2 is connected with a pin RXD of the transceiver isolation chip U8, the pin VCC of the transceiver isolation chip U8 is connected with a pin A of the transceiver isolation chip U8 through a resistor R9, the pin B of the transceiver isolation chip U8 is connected with a pin SGR 18 through a resistor R18, and the transient suppression pin D12 of the transceiver isolation chip U8 is connected with a common resistor R14 through a resistor R11 and a common diode D11.

In a second aspect, the present application provides a device for collecting tunnel gas monitoring data, comprising a housing and a circuit board provided with a circuit for collecting tunnel gas monitoring data according to any one of the first aspect, wherein the circuit board is arranged in the housing.

Compared with the prior art, the utility model has at least the following advantages or beneficial effects:

Through optimizing circuit structure to can carry out external corresponding one or more gas monitoring sensor through the sensor binding post that the RS485 module is connected, carry out gas monitoring data's collection, and can carry out long-range transmission through the network card module to the gas monitoring data who obtains, be convenient for carry out long-range acquisition and management to gas monitoring information.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a block diagram illustrating a circuit configuration of an embodiment of a circuit for tunnel gas monitoring data acquisition according to the present utility model;

FIG. 2 is a schematic diagram illustrating a signal flow of an embodiment of a circuit for collecting tunnel gas monitoring data according to the present utility model;

FIG. 3 is a block diagram of a circuit configuration of another embodiment of a tunnel gas monitoring data acquisition circuit according to the present utility model;

FIG. 4 is a schematic circuit diagram of a power module according to an embodiment of a circuit for collecting tunnel gas monitoring data;

FIG. 5 is a schematic circuit diagram of a singlechip module according to an embodiment of a circuit for collecting tunnel gas monitoring data;

FIG. 6 is a schematic circuit diagram of a network card module according to an embodiment of a circuit for collecting tunnel gas monitoring data;

FIG. 7 is a schematic circuit diagram of an RS485 module according to an embodiment of a circuit for collecting tunnel gas monitoring data;

fig. 8 is a schematic circuit diagram of a transceiver isolation module according to an embodiment of a circuit for collecting tunnel gas monitoring data.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Examples

Some embodiments of the present application are described in detail below with reference to the accompanying drawings. The various embodiments and features of the embodiments described below may be combined with one another without conflict.

Referring to fig. 1, the circuit for collecting tunnel gas monitoring data includes a power module, a single-chip microcomputer module, a network card module, an RS485 module and a transceiver isolation module, wherein the single-chip microcomputer module, the network card module, the RS485 module and the transceiver isolation module are respectively connected with the power module, the single-chip microcomputer module is further connected with the network card module, the RS485 module is connected with a sensor wiring terminal, and the sensor wiring terminal is used for connecting a gas monitoring sensor to be monitored.

In the tunnel construction and operation process, the environmental gas needs to be monitored, but most of gas monitoring devices can only monitor a single kind of gas and only use a wired information transmission technology for transmission. The monitoring of the environmental gas generally comprises the monitoring of the content of oxygen, carbon monoxide, hydrogen sulfide and methane harmful gases. In the above embodiment, the power module is used to provide the working voltage for the singlechip module, the network card module, the RS485 module and the transceiver isolation module at the later stage, so as to ensure that the transceiver isolation module can work normally. When the gas monitoring data in the tunnel is required to be acquired, the selected gas monitoring sensor of the corresponding type can be connected to a sensor wiring terminal connected with the RS485 module, and then the gas monitoring data acquired by the gas monitoring sensor in operation can be transmitted and exchanged through the RS485 serial bus in the gas monitoring sensor. Then, the singlechip module is used for transmitting or managing the gas monitoring data in the singlechip module through data interaction with the RS485 module, the singlechip module is used for processing the gas monitoring data into data which can be processed by the mesh module after acquiring the gas monitoring data, and then the singlechip module is used for transmitting the data to a local area network or a server which is connected in advance through the network card module, so that the remote acquisition and management requirements of the gas monitoring information are realized.

For example, as shown in fig. 2, for the RS485 module, the RS485 module may include an RS485 chip and an optical coupling isolation part, and the RS485 chip interacts the gas monitoring data acquired from the gas monitoring sensor with the K2 network server through the TTL signal, so that the remote acquisition and management requirements of the gas monitoring information can be realized. The TTL signal is a level signal, and is a signal represented by a level value. The TTL level signal specifies that +5V is equivalent to a logic "1" and 0V is equivalent to a logic "0" (when data is represented in binary).

Referring to fig. 3, in some embodiments of the present utility model, the power module includes a first voltage stabilizing circuit, a second voltage stabilizing circuit and a DC-DC isolation circuit, where the first voltage stabilizing circuit is used to stabilize an accessed direct current voltage to a first level, the second voltage stabilizing circuit is used to stabilize a received first level to a second level, the RS485 module is connected to the first voltage stabilizing circuit through the DC-DC isolation circuit, the first voltage stabilizing circuit and the second voltage stabilizing circuit are both connected to the transceiver isolation module, and the single chip module and the network card module are both connected to the second voltage stabilizing circuit.

In the above embodiment, the power supply module is divided into the first voltage stabilizing circuit, the second voltage stabilizing circuit and the DC-DC isolation circuit, and then the first voltage stabilizing circuit is used for performing the first voltage stabilizing treatment on the accessed external direct current voltage, stabilizing the direct current power supply with the voltage of 5V, and then further stabilizing the voltage to 3.3V through the second voltage stabilizing circuit, so as to supply power to different sub-circuits in the circuit, thereby ensuring that the circuit can work normally and stably. When the first voltage stabilizing circuit provides power supply voltage for the RS485 module, the power is supplied through the DC-DC isolation circuit, so that noise in power supply can be reduced, and the quality of information interaction between the RS485 module and the gas monitoring sensor is ensured.

Referring to fig. 4, in some embodiments of the utility model, the power module includes a MP4460DQ type power management chip U6, a DC-DC isolation chip U7, a power regulator chip U3, a transient suppression diode D5, a transient suppression diode D6, a diode D4, a diode D8, a light emitting diode D9, a resistor R1, a resistor R33, a resistor R38, a resistor R39, a resistor R40, a capacitor C8, a capacitor C11, a capacitor C60, a capacitor C59, a capacitor C12, a capacitor C13, a capacitor C5, a capacitor C6, a capacitor C10, a capacitor C14, and an inductor L5. Pin VIN of the power management chip U6 is grounded through the capacitor C8, the capacitor C11 and the transient suppression diode D3 which are connected in parallel in pairs, pin VIN of the power management chip U6 is also connected to the cathode of the diode D4, the anode of the diode D4 is connected to the external DC power supply of +24, pin FREQ of the power management chip U6 is grounded through the resistor R33, pin COMP of the power management chip U6 is grounded through the capacitor C60 and the resistor R40 which are sequentially connected in series, pin FB of the power management chip U6 is grounded through the resistor R39, pin FB of the power management chip U6 is also connected to pin SW of the power management chip U6 through the resistor R38 and the inductor L5 which are sequentially connected in series, pin SW of the power management chip U6 is connected to pin BST of the power management chip U6 through the capacitor C59, the pin SW of the power management chip U6 is connected with the cathode of the diode D8, the anode of the diode D8 is grounded, the common end of the resistor R38 and the inductor L5 is grounded through the capacitor C12, the capacitor C13 and the transient suppression diode D5 which are connected in parallel in pairs, the common end of the resistor R38 and the inductor L5 is also used for outputting a direct current power supply VDD_5V0, the common end of the resistor R38 and the inductor L5 is connected with the pin VIN of the power supply voltage stabilizing chip U3, the pin VOUT of the power supply voltage stabilizing chip U3 is grounded through the capacitor C10, the capacitor C14 and the transient suppression diode D6 which are connected in parallel in pairs, the pin VOUT of the power supply voltage stabilizing chip U3 is also used for outputting a direct current power supply VDD_3V3, the common end of the resistor R38 and the inductor L5 is connected with the pin VIN of the DC-DC isolation chip U7, the pin VIN of the DC-DC isolation chip U7 is connected to the pin GND of the DC-DC isolation chip U7 through the capacitor C6, and the pin 0V of the DC-DC isolation chip U7 is connected to the pin +vo of the DC-DC isolation chip U7 through the capacitor C5.

In the above embodiment, the power management chip U6 and its peripheral circuits are used to stabilize the accessed +24v dc power to +5v dc power, and the power stabilizing chip U3 is used to further stabilize the voltage to +3.3v. The diode D4 is used for preventing current in the circuit from reversing, the transient suppression diode D3 is used for preventing transient over-current in the circuit, the capacitor C8 and the capacitor C11 are used for primarily filtering the accessed direct current of +24v, and the inductor L5, the capacitor C12, the capacitor C13 and the capacitor C59 are used for filtering the direct current output by the power management chip U6, so that high-frequency noise and ripple waves at the output end of the power management chip U6 are removed. In addition, the capacitor C10, the capacitor C14 and the transient suppression diode D6 are used for further filtering the voltage output by the power supply voltage stabilizing chip U3, so as to ensure the purity of the voltage. The light emitting diode D9 connected to the DC-DC isolated chip U7 can be used as a power supply indication.

Referring to fig. 5, in some embodiments of the present utility model, the above-mentioned single-chip microcomputer module includes a single-chip microcomputer chip U9 of STM32L051K8U6 type, a connection terminal row J3, a resistor R19, a capacitor C55, a capacitor C15, a capacitor C16 and a capacitor C58. The pin VDD of the single chip microcomputer U9 is connected to the dc power supply vdd_3v3, the pin VDD of the single chip microcomputer U9 is grounded through the capacitor C15, the capacitor C16 and the capacitor C58 which are connected in parallel, the pin NRST of the single chip microcomputer U9 is connected to the dc power supply vdd_3v3 through the resistor R19, the pin NRST of the single chip microcomputer U9 is grounded through the capacitor C55, and the terminals 1, 3 and 5 of the terminal block J3 are connected to the pins 24, 23 and 22 of the single chip microcomputer U9, respectively.

In the above embodiment, the wiring terminal block J3 is used as a debug interface of the single chip microcomputer chip U9, and the capacitor C15, the capacitor C16 and the capacitor C58 are used for filtering ripple waves of the accessed dc power supply vdd_3v3, so as to provide a better quality power supply voltage for the single chip microcomputer chip U9.

Referring to fig. 6, in some embodiments of the present utility model, the network card module includes a PHY network card chip U10, a light emitting diode D7, a resistor R22, and a capacitor C9. The pin 3V3 of the PHY network card chip U10 is grounded through the capacitor C9, the pin 3V3 of the PHY network card chip U10 is connected to the dc power supply vdd_3v3, the pin led_link-of the PHY network card chip U10 is connected to the cathode of the light emitting diode D7, the anode of the light emitting diode D7 is connected to the dc power supply vdd_5v0 through the resistor R22, the pin TXD of the PHY network card chip U10 is connected to the pin PA3 of the single chip microcomputer chip U9, and the pin RXD of the PHY network card chip U10 is connected to the pin PA2 of the single chip microcomputer chip U9.

In the above embodiment, the PHY network card chip U10 is an ethernet PHY chip, and is used to transmit data and isolate different levels between different network devices connected by a network cable.

Referring to fig. 7, in some embodiments of the utility model, the RS485 module includes a connection terminal row J2, an optocoupler U4, a transceiver chip U1 of the MAX13487EESA +t model, a transient suppression diode D1, a transient suppression diode D2, a resistor R5, a resistor R3, a resistor R6, a resistor R7, a resistor R13, a resistor R14, a resistor R15, a resistor R16, a resistor R17, a capacitor C1, a capacitor C2, a capacitor C3, and a capacitor C4. The pin AN of the optocoupler U2 is connected to the DC power supply vdd_3v3 through the resistor R2, the pin VCC of the optocoupler U2 is connected to the pin +vo of the DC-DC isolation chip U7, the pin VCC of the optocoupler U2 is connected to the pin GND of the optocoupler U2 through the capacitor C2, the pin VCC of the optocoupler U2 is connected to the pin GND of the optocoupler U2 through the resistor R5, and the pin VO of the optocoupler U2 is connected to the pin DI of the transceiver chip U1. The pin VCC of the optocoupler U4 is grounded through the capacitor C3, the pin VCC of the optocoupler U4 is connected to the pin VO of the optocoupler U4 through the resistor R6, the pin VCC of the optocoupler U4 is connected to the DC power supply vdd_3v3, the pin AN of the optocoupler U4 is connected to the pin +vo of the DC-DC isolation chip U7 through the resistor R3, and the pin CAT of the optocoupler U4 is connected to the pin RO of the transceiver chip U1. The pin DE of the transceiver chip U1 is grounded through the resistor R7 and the capacitor C4 which are sequentially connected in series, the common terminal of the resistor R7 and the capacitor C4 is connected to the pin +vo of the DC-DC isolation chip U7, the pin VCC of the transceiver chip U1 is grounded through the capacitor C1, the pin VCC of the transceiver chip U1 is connected to the pin a of the transceiver chip U1 through the resistor R16, the pin a of the transceiver chip U1 is connected to the pin B of the transceiver chip U1 through the resistor R15, the pin B of the transceiver chip U1 is connected to the pin +vo of the DC-DC isolation chip U7 through the resistor R17, the pin a of the transceiver chip U1 is connected to the transient suppression diode D2 through the resistor R13 and the transient suppression diode D13 which are sequentially connected in series, the pin B of the transceiver chip U1 is connected to the common terminal J2 through the resistor R14 and the transient suppression diode D2, and the common terminal J2 is connected to the power supply line terminal J2.

In the above-described embodiments, the optocouplers U2 and U4 are, as optocouplers, an optical-electrical-mechanical conversion element that converts an input electrical signal into an optical signal output using energy of light. In the circuit, when incident light irradiates the photoelectric coupler, the photoelectric coupler receives information such as the intensity or the color of light reflected by an irradiated object; meanwhile, the output end also obtains the information of the light intensity of the irradiated object, thereby realizing the conversion of the photo-electro-mechanical system.

Referring to fig. 8, in some embodiments of the present utility model, the transceiver isolation module includes an RSM485M transceiver isolation chip U8, a transistor Q1, a transistor Q2, a capacitor C7, a resistor R8, a resistor R10, a resistor R23, a resistor R24, a resistor R9, a resistor R11, a resistor R12, and a resistor R18. The base of the triode Q1 is connected with the DC power supply VDD_3V3 through the resistor R8, the collector of the triode Q1 is connected with the pin VO of the optical coupler U4, the emitter of the triode Q1 is connected with the pin TXD of the transceiver isolation chip U8, the base of the triode Q2 is connected with the DC power supply VDD_3V3 through the resistor R23, the base of the triode Q2 is connected with the emitter of the triode Q2 through the resistor R10, the emitter of the triode Q2 is connected with the pin CAT of the optical coupler U2, the collector of the triode Q2 is connected with the pin RXD of the transceiver isolation chip U8 through the resistor R24, the pin VCC of the transceiver isolation chip U8 is connected with the pin +of the DC isolation chip U7 through the resistor R23, the pin VCC 8 is connected with the pin of the transceiver isolation chip U8 through the resistor R9, the pin VCC of the transceiver isolation chip U8 is connected with the pin of the transceiver isolation chip U8 through the resistor R12, and the pin 3 of the transceiver isolation chip U8 is connected with the transceiver chip U11 through the pin of the resistor R12.

In the above embodiment, the transceiver isolation chip U8 of RSM485M model is a single-path half-duplex high-speed RS485 isolation transceiver module, and the standard RS485 protocol transceiver module integrating the high-reliability isolation power supply and the high-strength signal isolation chip, the RS485 transceiver chip and the bus protection device into a whole is integrated. Its main function is to convert the TTL logic level to the differential level of the RS485 protocol, or to convert the RS485 differential signal to the TTL level.

The embodiment of the utility model also provides a device for collecting the tunnel gas monitoring data, which comprises a shell and a circuit board provided with the circuit for collecting the tunnel gas monitoring data, wherein the circuit board is arranged in the shell. The circuit board provided with the circuit for collecting the tunnel gas monitoring data is packaged in the shell, so that the device for collecting the tunnel gas monitoring data can be conveniently used by a user, and the device is convenient and quick.

It will be evident to those skilled in the art that the application is not limited to the details of the foregoing illustrative embodiments, and that the present application may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims (8)

1. The utility model provides a tunnel gas monitoring data acquisition's circuit, its characterized in that includes power module and respectively with power module links to each other singlechip module, network card module, RS485 module and transceiver isolation module, the singlechip module still with the network card module links to each other, RS485 module is connected with sensor binding post, sensor binding post is used for connecting the gas monitoring sensor that needs to monitor.

2. The circuit for collecting tunnel gas monitoring data according to claim 1, wherein the power module comprises a first voltage stabilizing circuit, a second voltage stabilizing circuit and a DC-DC isolation circuit, the first voltage stabilizing circuit is used for stabilizing an accessed direct current voltage to a first level, the second voltage stabilizing circuit is used for stabilizing the received first level to a second level, the RS485 module is connected with the first voltage stabilizing circuit through the DC-DC isolation circuit, the first voltage stabilizing circuit and the second voltage stabilizing circuit are connected with the transceiver isolation module, and the single chip microcomputer module and the network card module are connected with the second voltage stabilizing circuit.

3. The circuit for collecting tunnel gas monitoring data according to claim 1, wherein the power module comprises a power management chip U6, a DC-DC isolation chip U7, a power regulation chip U3, a transient suppression diode D5, a transient suppression diode D6, a diode D4, a diode D8, a light emitting diode D9, a resistor R1, a resistor R33, a resistor R38, a resistor R39, a resistor R40, a capacitor C8, a capacitor C11, a capacitor C60, a capacitor C59, a capacitor C12, a capacitor C13, a capacitor C5, a capacitor C6, a capacitor C10, a capacitor C14 and an inductor L5;

The pin VIN of the power management chip U6 is grounded through the capacitor C8, the capacitor C11 and the transient suppression diode D3 which are connected in parallel in pairs, the pin VIN of the power management chip U6 is also connected with the cathode of the diode D4, the anode of the diode D4 is used for being connected with an external direct current power supply of +24, the pin FREQ of the power management chip U6 is grounded through the resistor R33, the pin COMP of the power management chip U6 is grounded after being sequentially connected with the resistor R40 through the capacitor C60 and the resistor R40 in series, the pin FB of the power management chip U6 is grounded through the resistor R39, the pin FB of the power management chip U6 is also connected with the pin SW of the power management chip U6 after being sequentially connected with the resistor R38 and the inductor L5 in series, the pin SW of the power management chip U6 is connected with the pin BST of the power management chip U6 through the capacitor C59, the pin SW of the power management chip U6 is connected with the cathode of the diode D8, the anode of the diode D8 is grounded, the common end of the resistor R38 and the inductor L5 is grounded through the capacitor C12, the capacitor C13 and the transient suppression diode D5 which are connected in parallel in pairs, the common end of the resistor R38 and the inductor L5 is also used for outputting a direct current power supply VDD_5V0, the common end of the resistor R38 and the inductor L5 is connected with the pin VIN of the power supply voltage stabilizing chip U3, the pin VOUT of the power supply voltage stabilizing chip U3 is grounded through the capacitor C10, the capacitor C14 and the transient suppression diode D6 which are connected in parallel in pairs, the pin VOUT of the power supply voltage stabilizing chip U3 is also used for outputting a direct current power supply VDD_3V3, the common end of the resistor R38 and the inductor L5 is connected with the pin VIN of the DC-DC isolation chip U7, the pin VIN of the DC-DC isolation chip U7 is connected with the pin GND of the DC-DC isolation chip U7 through the capacitor C6, and the pin 0V of the DC-DC isolation chip U7 is connected with the pin +VO of the DC-DC isolation chip U7 through the capacitor C5.

4. The circuit for collecting tunnel gas monitoring data according to claim 3, wherein the single-chip microcomputer module comprises a single-chip microcomputer chip U9 of STM32L051K8U6 type, a wiring terminal row J3, a resistor R19, a capacitor C55, a capacitor C15, a capacitor C16 and a capacitor C58;

The pin VDD of the single chip microcomputer chip U9 is connected with the direct current power supply VDD_3V.3, the pin VDD of the single chip microcomputer chip U9 is grounded through the capacitor C15, the capacitor C16 and the capacitor C58 which are connected in parallel in pairs, the pin NRST of the single chip microcomputer chip U9 is connected with the direct current power supply VDD_3V.3 through the resistor R19, the pin NRST of the single chip microcomputer chip U9 is grounded through the capacitor C55, and the terminals 1, 3 and 5 of the wiring terminal strip J3 are connected with the pins 24, 23 and 22 of the single chip microcomputer chip U9 respectively.

5. The circuit for collecting tunnel gas monitoring data according to claim 4, wherein the network card module comprises a PHY network card chip U10, a light emitting diode D7, a resistor R22 and a capacitor C9;

The pin 3V3 of the PHY network card chip U10 is grounded through the capacitor C9, the pin 3V3 of the PHY network card chip U10 is connected with the direct current power supply VDD_3V3, the pin LED_LINK-of the PHY network card chip U10 is connected with the cathode of the light emitting diode D7, the anode of the light emitting diode D7 is connected with the direct current power supply VDD_5V0 through the resistor R22, the pin TXD of the PHY network card chip U10 is connected with the pin PA3 of the singlechip chip U9, and the pin RXD of the PHY network card chip U10 is connected with the pin PA2 of the singlechip chip U9.

6. A circuit for collecting monitoring data of tunnel gas according to claim 3, wherein the RS485 module comprises a wiring terminal block J2, an optocoupler U4, a transceiver chip U1 of the MAX13487EESA +t model, a transient suppression diode D1, a transient suppression diode D2, a resistor R5, a resistor R3, a resistor R6, a resistor R7, a resistor R13, a resistor R14, a resistor R15, a resistor R16, a resistor R17, a capacitor C1, a capacitor C2, a capacitor C3, and a capacitor C4;

The pin AN of the optocoupler U2 is connected with the direct current power supply VDD_3V3 through the resistor R2, the pin VCC of the optocoupler U2 is connected with the pin +VO of the DC-DC isolation chip U7, the pin VCC of the optocoupler U2 is connected with the pin GND of the optocoupler U2 through the capacitor C2, the pin VCC of the optocoupler U2 is connected with the pin GND of the optocoupler U2 through the resistor R5, and the pin VO of the optocoupler U2 is connected with the pin DI of the transceiver chip U1;

The pin VCC of the optocoupler U4 is grounded through the capacitor C3, the pin VCC of the optocoupler U4 is connected with the pin VO of the optocoupler U4 through the resistor R6, the pin VCC of the optocoupler U4 is connected with the direct current power supply VDD_3V3, the pin AN of the optocoupler U4 is connected with the pin +VO of the DC-DC isolation chip U7 through the resistor R3, and the pin CAT of the optocoupler U4 is connected with the pin RO of the transceiver chip U1;

The pin DE of the transceiver chip U1 is grounded through the resistor R7 and the capacitor C4 which are sequentially connected in series, the common end of the resistor R7 and the capacitor C4 is connected with the pin +VO of the DC-DC isolation chip U7, the pin VCC of the transceiver chip U1 is connected with the pin +VO of the DC-DC isolation chip U7 and then grounded, the pin VCC of the transceiver chip U1 is grounded through the capacitor C1, the pin VCC of the transceiver chip U1 is connected with the pin A of the transceiver chip U1 through the resistor R16, the pin A of the transceiver chip U1 is connected with the pin B of the transceiver chip U1 through the resistor R15, the pin B of the transceiver chip U1 is connected with the transient suppression diode D2 through the resistor R13 and the transient suppression diode D13 which are sequentially connected in series, the pin B of the transceiver chip U1 is connected with the common terminal J2 through the resistor R14 and the transient suppression diode D2, and the common terminal J2 is connected with the power supply terminal J2.

7. The circuit for collecting monitoring data of tunnel gas according to claim 6, wherein the transceiver isolation module comprises a transceiver isolation chip U8 of RSM485M type, a transistor Q1, a transistor Q2, a capacitor C7, a resistor R8, a resistor R10, a resistor R23, a resistor R24, a resistor R9, a resistor R11, a resistor R12 and a resistor R18;

The base of the triode Q1 is connected with the direct current power supply VDD_3V3 through the resistor R8, the collector of the triode Q1 is connected with the pin VO of the optical coupler U4, the emitter of the triode Q1 is connected with the pin TXD of the transceiver isolation chip U8, the base of the triode Q2 is connected with the direct current power supply VDD_3V3 through the resistor R23, the base of the triode Q2 is connected with the emitter of the triode Q2 through the resistor R10, the emitter of the triode Q2 is connected with the pin CAT of the optical coupler U2, the collector of the triode Q2 is connected with the pin RXD of the transceiver isolation chip U8 through the resistor R24, the pin VCC of the transceiver isolation chip U8 is connected with the pin +isolation chip U7 through the resistor R23, the transceiver pin U8 is connected with the transceiver U8 through the pin R9 and the pin R12 of the transceiver isolation chip U8 through the resistor R12, and the pin A of the transceiver isolation chip U8 is connected with the pin 3 through the transceiver isolation chip U8.

8. A device for collecting tunnel gas monitoring data, comprising a housing and a circuit board provided with a circuit for collecting tunnel gas monitoring data according to any one of claims 1-7, said circuit board being arranged in said housing.