CN105651945A - Wireless charging multi-parameter gas measuring device - Google Patents

Abstract

The invention discloses a wireless charging multi-parameter gas detector, which comprises a casing and a gas sampling module, a processor module, a power supply module, a wireless charging module, buttons, a display module and a storage unit respectively arranged in the casing; the gas The sampling module samples the gas and amplifies the signal, the gas sampling module outputs the level signal to the processor module, the processor module completes the sampling signal detection and stores the processed data in the storage unit; the processor module is used to complete the liquid crystal display Data control, button information processing, and alarm light and buzzer control work; the button and display module receive information from the processor module, complete parameter, time, and detection value setting and display; the wireless charging module emits electromagnetic waves to complete the power supply Module charging. The present invention does not need to be connected with electric wires during charging, and only needs to be placed near the charger; there is no need for electric wires to be entangled with each other.

Description

Wireless charging multi-parameter gas detector

technical field

The invention relates to the fields of petroleum, chemical industry, steel, environmental protection, non-coal mines, etc., in particular to a wireless charging multi-parameter gas tester applied in the fields of petroleum, chemical industry, steel, environmental protection, non-coal mines, etc.

Background technique

Multi-parameter gas detection technology is widely used in the detection of harmful gases, etc., and can accurately give early warning of hidden gas hazards in the air. The development of this detection technology is changing with each passing day, and its application in the inspection and elimination of accident precursors is also increasing. Widely, its development direction is miniaturization and automation, in order to realize long-term monitoring. The development of multi-parameter gas detection technology makes the leakage process can be found in the early stage.

At present, there are no mature products using wireless charging technology for multi-parameter gas detectors.

Contents of the invention

In view of this, the present invention provides a wireless charging multi-parameter gas tester.

The purpose of the present invention is achieved through such a technical solution, a wireless charging multi-parameter gas detector, including a housing and a gas sampling module, a processor module, a power module, a wireless charging module, buttons and Display module and storage unit; the gas sampling module samples the gas and amplifies the signal, the gas sampling module outputs a level signal to the processor module, and the processor module completes the detection of the sampling signal and stores the processed data in the storage unit The processor module is also used to complete liquid crystal display data control, button information processing, and the control work of the alarm lamp and buzzer; the button and display module receive the information of the processor module, and complete parameters, time, and detection values. Setting and display functions; the wireless charging module emits electromagnetic waves to complete the charging of the power module.

Further, the wireless charging module includes a first filter, a power-off circuit, a current detection circuit, an electromagnetic wave transmitting circuit with multiple input terminals, and a control module,

The current detection circuit includes a chip U1, a resistor R1, a resistor R3, a resistor R4, a resistor R6, a capacitor C3, a capacitor C5 and a capacitor C8, and the chip U1 is an operational amplifier;

The power-off circuit includes transistors Q1-Q3, chip U2, capacitor C1, capacitor C2, capacitor C4, capacitor C9, capacitor C10, resistor R5, resistor R7, resistor R8, resistor R10, resistor R11 and diode D1, the chip U2 is TLV70033DDC;

The electromagnetic wave transmitting circuit includes a chip U3, a chip U4, resistors R12-R24, capacitors C11-C22, a reactor L3, and a coil L2, the chip U3 is CSD97376CQ4M, and the chip U4 is CSD97376CQ4M;

The control module includes a chip U5 and its peripheral circuits, and the chip U5 is BQ500212A;

The first filter is composed of a resistor R2, a resistor R9 and a reactor L1, the capacitor C6 is connected in parallel between the two input terminals of the first filter, and one of the output terminals of the first filter is respectively passed through a resistor R5 is connected to the collector of transistor Q1 and the base of transistor Q1 via capacitor C2; the emitter of transistor Q1 is connected to the drain of transistor Q3, the source of transistor Q3 is connected to the electromagnetic wave emitting circuit, and the gate of transistor Q1 A resistor R10 is connected in parallel with the source, the collector of the transistor Q1 is connected to pin 1 of the chip U2 through a resistor R5, the emitter of the transistor Q1 is connected to pin 3 of the chip U2 through a reverse diode D1, and the resistor R7 is connected in parallel to the chip U2 Between pin 1 of the chip U2 and the negative pole of the diode D1, the resistor R8 is connected in parallel between the pin 1 of the chip U2 and the positive pole of the diode D1, the pin 1 of the chip U2 is grounded through the capacitor C1, the pin 5 of the chip U2 is connected to the power supply VCC and the The power supply VCC is grounded through the capacitor C4; the capacitor C10 is connected in parallel between the cathode of the diode D1 and the ground, and the capacitor C9 is connected in parallel between the anode of the diode D1 and the ground; the drain of the transistor Q2 is connected to the anode of the diode D1, and the transistor The gate of Q2 is grounded, the source of the transistor Q2 is connected to the electromagnetic wave transmitting circuit, and the resistor R11 is connected in parallel between the gate and the source of the transistor Q2;

One end of the resistor R1 is connected to one end of the capacitor C3, one end of the resistor R1, and one end of the resistor R4, the other end of the capacitor C3 is grounded, the other end of the resistor R1 is connected to the positive input of the chip U1, and the resistor R4 The other end is connected to one end of the resistor R6, the other end of the resistor R6 is connected to the reverse input terminal of the chip U1, and the capacitor C5 is connected in parallel between the positive input terminal and the reverse input terminal of the chip U1; The output end is connected to pin 42 of the chip U5 through the resistor R3, the positive power input end of the chip U1 is respectively connected to the power supply VCC and one end of the capacitor C8, and the other end of the capacitor C8 is connected to the electromagnetic wave transmitting circuit through the capacitor C7;

The reactor L3, the resistor R12 and the resistor R13 form the second filter, the common ends of the resistor R4 and the resistor R6 are respectively connected to the capacitor C17 and the 5-pin of the chip U3, the other end of the capacitor C16 is grounded, and the 8-pin of the chip U3 are respectively The resistor R15 is connected to the 12-pin of the chip U5, the resistor R16 is grounded, the capacitor C17 and the resistor R20 are connected in parallel between the 6-pin and the 7-pin of the chip U3, and the capacitor C17 and the resistor R20 are connected in parallel. Pin 1 of U3 is connected to pin 1 of chip U2, and pins 3 and 9 of chip U3 are directly grounded; pin 4 of chip U4 is connected to one of the input ends of the second filter; the common end of the resistor R4 and resistor R6 is passed through Capacitor C20 is grounded, pin 5 of chip U4 is grounded through capacitor C20, capacitor C19 and resistor R19 are connected in parallel between pins 6 and 7 of chip U4, pin 1 of chip U4 is connected with pin 1 of chip U2, pins 1, 7 of chip U4 Pin 2 is grounded via capacitor C14, and pins 3 and 9 of chip U4 are directly grounded; pin 8 of the chip U4 is grounded respectively via resistor R17, and connected to pin 42 of chip U5 via resistor R14; pin 4 of the chip U4 is connected via capacitor C11 is connected with the other input end of the second filter, and the coil L2 is connected in parallel between the two output ends of the first filter; the capacitor C12, the capacitor C15, and the capacitor C21 are connected in parallel at both ends of the capacitor C11, and the capacitor C18 is connected with the second capacitor C11. The other input terminal of the filter is connected, the other end of the capacitor C18 is connected to one end of the resistor R18, the other end of the resistor R18 is respectively connected to the pin 39 of the chip U5 through the resistor R22, connected to the power supply VCC through the resistor R21, and connected in sequence Resistor R23 and resistor R24 are connected to pin 40 of the chip U5, the common end of the resistor R23 and the resistor R24 is grounded, one end of the capacitor C22 is connected to the common end of the resistor R22 and the resistor R21, and the other end of the capacitor C22 is grounded.

Further, the power module includes sequentially connected coil CZ3, battery management chip U6, linear charging circuit and boost circuit; the coil CZ3 is connected to the battery management chip U6, and the coil CZ3 converts the received electromagnetic wave through the battery management chip U6 A power supply is used to charge the storage battery through a linear charging circuit; the boost circuit boosts the voltage of the storage battery and outputs it to the outside through interfaces CZ1 and CZ2.

Further, the power supply module also includes a power supply switching circuit connected between the linear charging circuit and the boost circuit, and the power supply switching circuit is used to directly use the charging voltage for external power supply when the battery is being charged to ensure that the battery can be fully charged.

Further, the gas sampling module includes CO sampling unit, H ₂ S sampling unit, NO ₂ sampling unit and O ₂ sampling unit,

The CO sampling unit includes a CO sensor, resistors R65-R72, capacitors C48-C53, inductors L6-L8, chip U10A and chip U10B, the chip U10A is an operational amplifier, the chip U10B is an operational amplifier, and the S terminal of the CO The inductance L8, resistor R68, and resistor R69 connected in sequence are connected to the reverse input terminal of the chip U10A, a capacitor C50 is connected in parallel between the forward input terminal and the reverse input terminal of the chip U10A, and the positive input terminal of the chip U10A is grounded through the resistor R72 , the output terminal of the chip U10A is connected to the processor module through the resistor R71; the resistor R71 is grounded through the capacitor C53, the resistor R70 is connected in parallel between the output terminal of the chip U10A and the common terminal of the resistor R68 and the resistor R69, and the capacitor C54 is connected in parallel with the resistor R70; The common end of the resistor R68 and the resistor R69 is connected to the positive input end of the chip U10B through the resistor R67, the R end of the CO sensor is connected to the reverse input end of the chip U10B through the inductance L7, the resistor R65, and the resistor R66 connected in sequence, and the capacitor C49 is connected in parallel between the positive input terminal and the reverse input terminal of the chip U10B, the C terminal of the CO sensor is connected with the output terminal of the chip U10B through the inductor L6, and the capacitor C48 is connected in parallel with the common terminal of the resistor R65 and the resistor R66 and the chip U10B. between the output terminals;

The _O2 sampling unit includes an _O2 sensor, resistors R73-R76, capacitors C55-C57 and a chip U11, the chip U11 is an operational amplifier, and the two ends of the _O2 sensor are connected in parallel with a resistor R53 and a resistor R107, and the resistor R107 is passed through a resistor R74 It is connected with the positive input terminal of the chip U11, the reverse input terminal of the chip U11 is grounded through the resistor R73, the resistor R75 is connected in parallel between the reverse input terminal and the output terminal of the chip U11, and the output terminal of the chip U11 is connected with the resistor R76 and Processor module connection;

The H ₂ S sampling unit, the NO ₂ sampling unit and the CO sampling unit adopt the same structure.

Further, the processor module includes a chip U13 and an A/D conversion unit and a clock circuit respectively connected to the chip U13, and the chip U13 is a PIC18F4620; the A/D conversion unit receives 4-way gas sampling signals and converts these 4-way The analog signal is converted into a data signal, and the data is uploaded to the chip U13 through the data interface. After the chip U13 undergoes information processing, the corresponding information is combined with the time for storage, display, alarm and other action processing. At the same time, the chip U13 receives the button through the I/O port. Module information, to complete the setting and adjustment of time and parameters. The 36 and 4 pins of the chip U13 are connected to the socket CZ5 to complete the control of the buzzer and alarm lights; the 20, 21, 22, and 24 pins of the chip U13 are connected to the sockets CZ6 and CZ7 , to complete the data communication with the liquid crystal display unit; pins 8, 9, and 14 of the chip U13 are connected to the socket CZ6 to receive key information for processing.

Owing to adopting above-mentioned technical scheme, the present invention has following advantage:

1) Safe and reliable: no energized contact design to avoid the risk of electric shock; no disadvantage of unreliable charging after oxidation of charging contacts.

2) Durability: The power transmission device is not exposed, so it will not be corroded by moisture and oxygen in the air; there is no contact point, so there will be no loss caused by mechanical wear and flashover during connection and separation.

3) Convenience: There is no need to connect with wires when charging, just put it near the charger; there is no trouble of wires being entangled with each other.

Description of drawings

In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with the accompanying drawings, wherein:

Figure 1 is a block diagram of a wireless charging multi-parameter gas detector system;

Figure 2 is a schematic diagram of a wireless charger circuit, 2a is a power-off circuit, 2b is a current detection circuit, 2c is an electromagnetic wave transmitting circuit, and 2d is a circuit diagram of a control module;

Figure 3 is a schematic diagram of the power module circuit;

Fig. 4 is a gas sampling module circuit diagram, 4a is a CO sampling unit circuit diagram, and 4b is an _O2 sampling unit circuit diagram;

Fig. 5 is a processor module circuit diagram;

Fig. 6 is a circuit diagram of the button and the display module.

detailed description

The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings; it should be understood that the preferred embodiments are only for illustrating the present invention, rather than limiting the protection scope of the present invention.

A wireless charging multi-parameter gas detector, comprising a housing and a gas sampling module, a processor module, a power module, a wireless charging module, buttons, a display module and a storage unit respectively arranged in the housing; Perform sampling and signal amplification, the gas sampling module outputs level signals to the processor module, the processor module completes the detection of the sampling signal and stores the processed data in the storage unit; the processor module is also used to complete the liquid crystal display data Control, button information processing, and control of alarm lights and buzzers; the buttons and display module receive information from the processor module, and complete the setting and display of parameters, time, and detection values; the wireless charging module emits electromagnetic waves, Finish charging the power module.

The wireless charging module emits electromagnetic waves to complete the charging of the lithium iron phosphate battery; the power charging module receives the battery waves sent by the wireless charger, manages the charging of the lithium iron phosphate battery, and provides 2-way 3.3V power supply to the main board circuit; the gas sampling module Four gas sensitive elements are used to complete the sampling and signal amplification of four different gases, and output level signals to the processor module; the processor module is the core part, which completes the detection of sampling signals, liquid crystal display data control, and key information processing , data storage, and control of alarm lights and buzzers; the buttons and display module receive processor information, and complete the setting and display of parameters, stored data, time, and detection values.

As shown in Figure 2, the wireless charging module includes a first filter, a power-off circuit, a current detection circuit, an electromagnetic wave transmitting circuit with multiple input terminals, and a control module,

The current detection circuit includes a chip U1, a resistor R1, a resistor R3, a resistor R4, a resistor R6, a capacitor C3, a capacitor C5 and a capacitor C8, and the chip U1 is an operational amplifier;

The power-off circuit includes transistors Q1-Q3, chip U2, capacitor C1, capacitor C2, capacitor C4, capacitor C9, capacitor C10, resistor R5, resistor R7, resistor R8, resistor R10, resistor R11 and diode D1, the chip U2 is TLV70033DDC;

The electromagnetic wave transmitting circuit includes a chip U3, a chip U4, resistors R12-R24, capacitors C11-C22, a reactor L3, and a coil L2, the chip U3 is CSD97376CQ4M, and the chip U4 is CSD97376CQ4M;

The control module includes a chip U5 and its peripheral circuits, and the chip U5 is BQ500212A;

The first filter is composed of a resistor R2, a resistor R9 and a reactor L1, the capacitor C6 is connected in parallel between the two input terminals of the first filter, and one of the output terminals of the first filter is respectively passed through a resistor R5 is connected to the collector of transistor Q1 and the base of transistor Q1 via capacitor C2; the emitter of transistor Q1 is connected to the drain of transistor Q3, the source of transistor Q3 is connected to the electromagnetic wave emitting circuit, and the gate of transistor Q1 A resistor R10 is connected in parallel with the source, the collector of the transistor Q1 is connected to pin 1 of the chip U2 through a resistor R5, the emitter of the transistor Q1 is connected to pin 3 of the chip U2 through a reverse diode D1, and the resistor R7 is connected in parallel to the chip U2 Between pin 1 of the chip U2 and the negative pole of the diode D1, the resistor R8 is connected in parallel between the pin 1 of the chip U2 and the positive pole of the diode D1, the pin 1 of the chip U2 is grounded through the capacitor C1, the pin 5 of the chip U2 is connected to the power supply VCC and the The power supply VCC is grounded through the capacitor C4; the capacitor C10 is connected in parallel between the cathode of the diode D1 and the ground, and the capacitor C9 is connected in parallel between the anode of the diode D1 and the ground; the drain of the transistor Q2 is connected to the anode of the diode D1, and the transistor The gate of Q2 is grounded, the source of the transistor Q2 is connected to the electromagnetic wave transmitting circuit, and the resistor R11 is connected in parallel between the gate and the source of the transistor Q2;

One end of the resistor R1 is connected to one end of the capacitor C3, one end of the resistor R1, and one end of the resistor R4, the other end of the capacitor C3 is grounded, the other end of the resistor R1 is connected to the positive input of the chip U1, and the resistor R4 The other end is connected to one end of the resistor R6, the other end of the resistor R6 is connected to the reverse input terminal of the chip U1, and the capacitor C5 is connected in parallel between the positive input terminal and the reverse input terminal of the chip U1; The output end is connected to pin 42 of the chip U5 through the resistor R3, the positive power input end of the chip U1 is respectively connected to the power supply VCC and one end of the capacitor C8, and the other end of the capacitor C8 is connected to the electromagnetic wave transmitting circuit through the capacitor C7;

The reactor L3, the resistor R12 and the resistor R13 form the second filter, the common ends of the resistor R4 and the resistor R6 are respectively connected to the capacitor C17 and the 5-pin of the chip U3, the other end of the capacitor C16 is grounded, and the 8-pin of the chip U3 are respectively The resistor R15 is connected to the 12-pin of the chip U5, the resistor R16 is grounded, the capacitor C17 and the resistor R20 are connected in parallel between the 6-pin and the 7-pin of the chip U3, and the capacitor C17 and the resistor R20 are connected in parallel. Pin 1 of U3 is connected to pin 1 of chip U2, and pins 3 and 9 of chip U3 are directly grounded; pin 4 of chip U4 is connected to one of the input ends of the second filter; the common end of the resistor R4 and resistor R6 is passed through Capacitor C20 is grounded, pin 5 of chip U4 is grounded through capacitor C20, capacitor C19 and resistor R19 are connected in parallel between pins 6 and 7 of chip U4, pin 1 of chip U4 is connected with pin 1 of chip U2, pins 1, 7 of chip U4 Pin 2 is grounded via capacitor C14, and pins 3 and 9 of chip U4 are directly grounded; pin 8 of the chip U4 is grounded respectively via resistor R17, and connected to pin 42 of chip U5 via resistor R14; pin 4 of the chip U4 is connected via capacitor C11 is connected with the other input end of the second filter, and the coil L2 is connected in parallel between the two output ends of the first filter; the capacitor C12, the capacitor C15, and the capacitor C21 are connected in parallel at the two ends of the capacitor C11, and the capacitor C18 is connected with the second filter. The other input terminal of the filter is connected, the other end of the capacitor C18 is connected to one end of the resistor R18, the other end of the resistor R18 is respectively connected to the pin 39 of the chip U5 through the resistor R22, connected to the power supply VCC through the resistor R21, and connected in sequence Resistor R23 and resistor R24 are connected to pin 40 of the chip U5, the common end of the resistor R23 and the resistor R24 is grounded, one end of the capacitor C22 is connected to the common end of the resistor R22 and the resistor R21, and the other end of the capacitor C22 is grounded.

The working process of the wireless charger circuit: provide 5V power supply through the USB interface (J1), and then perform de-interference processing on the 5V power supply through components C6, R2, R9, L1); and after U2 step down to 3.3V as the charging controller chip U5 (BQ500212A) working power supply; U5 determines whether to disconnect the 5V power supply of the USB interface by controlling the power-off circuit; U5 controls the charging current exceeding the limit through the current detection circuit; at the same time, U5 controls the indicator light through pins 7 and 8 to indicate the charging status And the fault state, through the pin 24 to control the buzzer SP1 to issue a fault alarm sound; after controlling the voltage and current of the input power supply, it is converted into PWM electromagnetic waves and sent out by the transmitter circuit to emit charging electromagnetic waves.

As shown in Figure 3, the power module includes a coil CZ3, a battery management chip U6, a linear charging circuit and a boost circuit connected in sequence; the coil CZ3 is connected to the battery management chip U6, and the coil CZ3 passes the received electromagnetic waves through the battery The management chip U6 converts it into power, and charges the battery through the linear charging circuit; the boost circuit boosts the voltage of the battery and outputs it to the outside through the interface CZ1 and interface CZ2.

The power supply module also includes a power supply switching circuit connected between the linear charging circuit and the booster circuit. The power supply switching circuit is used to directly use the charging voltage for external power supply when the battery is being charged, so as to ensure that the battery can reach fully charged state.

Power module unit circuit work flow: The receiving end circuit of the power module is composed of coil CZ3, receiving battery management chip U6 and auxiliary components (C32~C43, R49~R52), which convert the received electromagnetic wave into 5VDC power supply for lithium iron phosphate battery BAT performs linear charging; the linear charging circuit is mainly composed of chip U7 (CN3058E) and other auxiliary components (R53~R19, E1, E2, LED4), LED4 indicates the charging status, and the chip CN3058E has the functions of charging temperature, charging voltage and charging current. Detection control function; M1 and D3 in the circuit are power supply switching circuits. When the battery is charging, the external power supply directly uses the charging voltage to ensure that the battery can be fully charged; power chips U8, U9 and other auxiliary components (L4 , L5, R62, R63, C44, C45, C46, C47) the circuit composed of the battery voltage 3.2V rises to 3.3V (2 routes) by the interface CZ1, CZ2 external output.

As shown in Figure 4, the gas sampling module includes CO sampling unit, H ₂ S sampling unit, NO ₂ sampling unit and O ₂ sampling unit,

The CO sampling unit includes a CO sensor, resistors R65-R72, capacitors C48-C53, inductors L6-L8, chip U10A and chip U10B, the chip U10A is an operational amplifier, the chip U10B is an operational amplifier, and the S terminal of the CO The inductance L8, resistor R68, and resistor R69 connected in sequence are connected to the reverse input terminal of the chip U10A, a capacitor C50 is connected in parallel between the forward input terminal and the reverse input terminal of the chip U10A, and the positive input terminal of the chip U10A is grounded through the resistor R72 , the output terminal of the chip U10A is connected to the processor module through the resistor R71; the resistor R71 is grounded through the capacitor C53, the resistor R70 is connected in parallel between the output terminal of the chip U10A and the common terminal of the resistor R68 and the resistor R69, and the capacitor C54 is connected in parallel with the resistor R70; The common end of the resistor R68 and the resistor R69 is connected to the positive input end of the chip U10B through the resistor R67, the R end of the CO sensor is connected to the reverse input end of the chip U10B through the inductance L7, the resistor R65, and the resistor R66 connected in sequence, and the capacitor C49 is connected in parallel between the positive input terminal and the reverse input terminal of the chip U10B, the C terminal of the CO sensor is connected with the output terminal of the chip U10B through the inductor L6, and the capacitor C48 is connected in parallel with the common terminal of the resistor R65 and the resistor R66 and the chip U10B. between the output terminals;

The _O2 sampling unit includes an _O2 sensor, resistors R73-R76, capacitors C55-C57 and a chip U11, the chip U11 is an operational amplifier, and the two ends of the _O2 sensor are connected in parallel with a resistor R53 and a resistor R107, and the resistor R107 is passed through a resistor R74 It is connected with the positive input terminal of the chip U11, the reverse input terminal of the chip U11 is grounded through the resistor R73, the resistor R75 is connected in parallel between the reverse input terminal and the output terminal of the chip U11, and the output terminal of the chip U11 is connected with the resistor R76 and Processor module connection;

The H ₂ S sampling unit, the NO ₂ sampling unit and the CO sampling unit adopt the same structure.

Gas sampling module unit circuit work flow: After the sensitive elements O ₂ , NO ₂ , CO, and H ₂ S collect the corresponding gas, they produce electrical signals through electrochemical reactions, which are amplified by their corresponding operational amplifier circuits and output 4-way level signals (analog signal).

As shown in Figure 5, the processor module includes a chip U13 and an A/D conversion unit and a clock circuit respectively connected to the chip U13, and the chip U13 is a PIC18F4620; the A/D conversion unit receives 4 gas sampling signals Convert these 4 channels of analog signals into data signals, and upload the data to the chip U13 through the data interface. After the chip U13 has processed the information, it will combine the corresponding information with the time for storage, display, alarm and other action processing. The user can press the button to select The measured values of different gases and their corresponding times are observed on the liquid crystal display, and at the same time, the chip U13 receives the button module information through the I/O port, and completes the setting and adjustment of time and parameters, and the selection and storage function of different information can also be performed through the buttons . The pins 36 and 4 of the chip U13 are connected to the socket CZ5 to complete the control of the buzzer and the alarm light; the pins 20, 21, 22, and 24 of the chip U13 are connected to the sockets CZ6 and CZ7 to complete the data communication with the LCD unit; the chip U13 Pins 8, 9, and 14 are connected to the socket CZ6 to receive key information for processing.

Referring to accompanying drawing 6, the working process of the button and display module unit circuit: there are three buttons S1, S2, and S3, and each button has two states, corresponding to output high and low levels, and the chip U13 completes through the high and low levels Read the information of the buttons; LCD1 represents the liquid crystal display module, communicates with the chip U13 through the analog serial port, receives the command of the chip U13, and displays different content; LED5, LED6, LED7, and LED8 have 4 alarm indicators, and receives the command of the chip U13 , to display different light states (off/on) for the alarm conditions of the four gases; the buzzer alarm circuit is composed of U20, SP1 and other auxiliary components, and receives the command of the chip U13 to complete the sound alarm.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention also intends to include these modifications and variations.

Claims (6)

1. A wireless charging multi-parameter gas analyzer, characterized in that: it comprises a housing and a gas sampling module, a processor module, a power supply module, a wireless charging module, buttons, a display module and a storage unit respectively arranged in the housing; The gas sampling module samples the gas and amplifies the signal, the gas sampling module outputs a level signal to the processor module, and the processor module completes the detection of the sampling signal and stores the processed data in the storage unit; the processor module also It is used to complete liquid crystal display data control, button information processing, and control work of alarm lights and buzzers; the buttons and display module receive information from the processor module, and complete the setting and display functions of parameters, time, and detection values; The wireless charging module emits electromagnetic waves to complete the charging of the power module. 2. The wireless charging multi-parameter gas detector according to claim 1, characterized in that: the wireless charging module includes a first filter, a power-off circuit, a current detection circuit, an electromagnetic wave transmitting circuit with multiple input terminals and a control module, The current detection circuit includes a chip U1, a resistor R1, a resistor R3, a resistor R4, a resistor R6, a capacitor C3, a capacitor C5 and a capacitor C8, and the chip U1 is an operational amplifier; The power-off circuit includes transistors Q1-Q3, chip U2, capacitor C1, capacitor C2, capacitor C4, capacitor C9, capacitor C10, resistor R5, resistor R7, resistor R8, resistor R10, resistor R11 and diode D1, the chip U2 is TLV70033DDC; The electromagnetic wave transmitting circuit includes a chip U3, a chip U4, resistors R12-R24, capacitors C11-C22, a reactor L3, and a coil L2, the chip U3 is CSD97376CQ4M, and the chip U4 is CSD97376CQ4M; The control module includes a chip U5 and its peripheral circuits, and the chip U5 is BQ500212A; The first filter is composed of a resistor R2, a resistor R9 and a reactor L1, the capacitor C6 is connected in parallel between the two input terminals of the first filter, and one of the output terminals of the first filter is respectively passed through a resistor R5 is connected to the collector of transistor Q1 and the base of transistor Q1 via capacitor C2; the emitter of transistor Q1 is connected to the drain of transistor Q3, the source of transistor Q3 is connected to the electromagnetic wave emitting circuit, and the gate of transistor Q1 A resistor R10 is connected in parallel with the source, the collector of the transistor Q1 is connected to pin 1 of the chip U2 through a resistor R5, the emitter of the transistor Q1 is connected to pin 3 of the chip U2 through a reverse diode D1, and the resistor R7 is connected in parallel to the chip U2 Between pin 1 of the chip U2 and the negative pole of the diode D1, the resistor R8 is connected in parallel between the pin 1 of the chip U2 and the positive pole of the diode D1, the pin 1 of the chip U2 is grounded through the capacitor C1, the pin 5 of the chip U2 is connected to the power supply VCC and the The power supply VCC is grounded through the capacitor C4; the capacitor C10 is connected in parallel between the cathode of the diode D1 and the ground, and the capacitor C9 is connected in parallel between the anode of the diode D1 and the ground; the drain of the transistor Q2 is connected to the anode of the diode D1, and the transistor The gate of Q2 is grounded, the source of the transistor Q2 is connected to the electromagnetic wave transmitting circuit, and the resistor R11 is connected in parallel between the gate and the source of the transistor Q2; One end of the resistor R1 is connected to one end of the capacitor C3, one end of the resistor R1, and one end of the resistor R4, the other end of the capacitor C3 is grounded, the other end of the resistor R1 is connected to the positive input of the chip U1, and the resistor R4 The other end is connected to one end of the resistor R6, the other end of the resistor R6 is connected to the reverse input terminal of the chip U1, and the capacitor C5 is connected in parallel between the positive input terminal and the reverse input terminal of the chip U1; The output end is connected to pin 42 of the chip U5 through the resistor R3, the positive power input end of the chip U1 is respectively connected to the power supply VCC and one end of the capacitor C8, and the other end of the capacitor C8 is connected to the electromagnetic wave transmitting circuit through the capacitor C7; The reactor L3, the resistor R12 and the resistor R13 form the second filter, the common ends of the resistor R4 and the resistor R6 are respectively connected to the capacitor C17 and the 5-pin of the chip U3, the other end of the capacitor C16 is grounded, and the 8-pin of the chip U3 are respectively The resistor R15 is connected to the 12-pin of the chip U5, the resistor R16 is grounded, the capacitor C17 and the resistor R20 are connected in parallel between the 6-pin and the 7-pin of the chip U3, and the capacitor C17 and the resistor R20 are connected in parallel. Pin 1 of U3 is connected to pin 1 of chip U2, and pins 3 and 9 of chip U3 are directly grounded; pin 4 of chip U4 is connected to one of the input ends of the second filter; the common end of the resistor R4 and resistor R6 is passed through Capacitor C20 is grounded, pin 5 of chip U4 is grounded through capacitor C20, capacitor C19 and resistor R19 are connected in parallel between pins 6 and 7 of chip U4, pin 1 of chip U4 is connected with pin 1 of chip U2, pins 1, 7 of chip U4 Pin 2 is grounded via capacitor C14, and pins 3 and 9 of chip U4 are directly grounded; pin 8 of the chip U4 is grounded respectively via resistor R17, and connected to pin 42 of chip U5 via resistor R14; pin 4 of the chip U4 is connected via capacitor C11 is connected with the other input end of the second filter, and the coil L2 is connected in parallel between the two output ends of the first filter; the capacitor C12, the capacitor C15, and the capacitor C21 are connected in parallel at both ends of the capacitor C11, and the capacitor C18 is connected with the second capacitor C11. The other input terminal of the filter is connected, the other end of the capacitor C18 is connected to one end of the resistor R18, the other end of the resistor R18 is respectively connected to the pin 39 of the chip U5 through the resistor R22, connected to the power supply VCC through the resistor R21, and connected in sequence Resistor R23 and resistor R24 are connected to pin 40 of the chip U5, the common end of the resistor R23 and the resistor R24 is grounded, one end of the capacitor C22 is connected to the common end of the resistor R22 and the resistor R21, and the other end of the capacitor C22 is grounded. 3. The wireless charging multi-parameter gas detector according to claim 2, characterized in that: the power module includes a coil CZ3, a battery management chip U6, a linear charging circuit and a boost circuit connected in sequence; the coil CZ3 and The battery management chip U6 is connected, and the coil CZ3 converts the received electromagnetic waves into power through the battery management chip U6, and charges the battery through a linear charging circuit; the boost circuit boosts the voltage of the battery and sends it to the outside through the interface CZ1 and interface CZ2. output. 4. The wireless charging multi-parameter gas detector according to claim 3, characterized in that: the power module also includes a power supply switching circuit connected between the linear charging circuit and the boost circuit, and the power supply switching circuit When the battery is being charged, the external power supply directly uses the charging voltage to ensure that the battery can be fully charged. 5. The wireless charging multi-parameter gas detector according to claim ₃ , wherein the gas sampling module includes a _CO sampling unit, an H2S sampling unit, an NO2 sampling unit and an _O2 sampling unit, The CO sampling unit includes a CO sensor, resistors R65-R72, capacitors C48-C53, inductors L6-L8, chip U10A and chip U10B, the chip U10A is an operational amplifier, the chip U10B is an operational amplifier, and the S terminal of the CO The inductance L8, resistor R68, and resistor R69 connected in sequence are connected to the reverse input terminal of the chip U10A, a capacitor C50 is connected in parallel between the positive input terminal and the reverse input terminal of the chip U10A, and the positive input terminal of the chip U10A is grounded through the resistor R72 , the output terminal of the chip U10A is connected to the processor module through the resistor R71; the resistor R71 is grounded through the capacitor C53, the resistor R70 is connected in parallel between the output terminal of the chip U10A and the common terminal of the resistor R68 and the resistor R69, and the capacitor C54 is connected in parallel with the resistor R70; The common end of the resistor R68 and the resistor R69 is connected to the positive input end of the chip U10B through the resistor R67, the R end of the CO sensor is connected to the reverse input end of the chip U10B through the sequentially connected inductor L7, resistor R65, and resistor R66, and the capacitor C49 is connected in parallel between the positive input terminal and the reverse input terminal of the chip U10B, the C terminal of the CO sensor is connected with the output terminal of the chip U10B through the inductor L6, and the capacitor C48 is connected in parallel with the common terminal of the resistor R65 and the resistor R66 and the chip U10B. between the output terminals; The _O2 sampling unit includes an _O2 sensor, resistors R73-R76, capacitors C55-C57 and a chip U11, the chip U11 is an operational amplifier, and the two ends of the _O2 sensor are connected in parallel with a resistor R53 and a resistor R107, and the resistor R107 is passed through a resistor R74 It is connected with the positive input terminal of the chip U11, the reverse input terminal of the chip U11 is grounded through the resistor R73, the resistor R75 is connected in parallel between the reverse input terminal and the output terminal of the chip U11, and the output terminal of the chip U11 is connected with the resistor R76 and Processor module connection; The H ₂ S sampling unit, the NO ₂ sampling unit and the CO sampling unit adopt the same structure. 6. The wireless charging multi-parameter gas detector according to claim 4, characterized in that: the processor module includes a chip U13 and an A/D conversion unit and a clock circuit respectively connected to the chip U13, and the chip U13 is PIC18F4620; the A/D conversion unit receives 4-way gas sampling signals and converts these 4-way analog signals into data signals, and uploads the data to the chip U13 through the data interface. After the chip U13 processes the information, it combines the corresponding information with the time Storage, display, alarm and other action processing. At the same time, the chip U13 receives the button module information through the I/O port, and completes the setting and adjustment of time and parameters. control; pins 20, 21, 22, and 24 of chip U13 are connected to sockets CZ6 and CZ7 to complete data communication with the liquid crystal display unit; pins 8, 9, and 14 of chip U13 are connected to socket CZ6 to receive key information for processing.