Hydrogenation gas pressure monitor

Abstract

The utility model discloses a hydrogenation gas pressure monitor which comprises a microcontroller circuit, and the microcontroller circuit is connected with a power supply circuit, an NBIoT wireless communication circuit, an inlet pressure detection circuit, an outlet pressure detection circuit, a FLASH storage circuit, an EEPROM storage circuit and a screen display circuit. The inlet pressure detection circuit and the outlet pressure detection circuit can immediately report abnormal data in front of and behind the gas pipeline valve to the management platform through the NBIoT wireless communication circuit when pressure values in front of and behind the gas pipeline valve are detected and the pressure is abnormal, the management platform is provided with a data model, pipe network states under different pressure conditions can be identified, and the management platform is convenient to use. And issuing different pressure alarm strategies and parameters. And the platform analyzes and predicts the pressure change of the hydrogenation gas in the pipeline so as to optimize the operation and improve the efficiency, and the technical problems of complicated hardware equipment and wiring and low monitoring efficiency of the gas pressure monitor in the prior art are solved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to gas pipe network pressure monitoring technical field, concretely relates to a hydrogenation gas pressure monitor. BACKGROUND

[0002] The existing gas pressure monitor is mostly single point type, needs to install two ways of inlet and outlet to monitor when installing in the gas pipe network, and the association of two ways of equipment is realized in the background. In the subsequent maintenance, the power consumption of two monitors before and after the same gas pipeline is often inconsistent, so that the same pipeline network needs maintenance personnel to replace the battery twice in a short period of time, causing the waste of manpower. The single point type monitor has some confusing and parameter setting disorder in the background management. SUMMARY

[0003] In view of the existing problems in the prior art, the utility model aims at providing a hydrogenation gas pressure monitor to solve the technical problems of complicated hardware equipment and wiring and low monitoring efficiency of the gas pressure monitor in the prior art.

[0004] In order to solve the above technical problems, the utility model adopts the following technical scheme to realize it:

[0005] A hydrogenation gas pressure monitor, comprising a microcontroller circuit, a power supply circuit, an NB_IoT wireless communication circuit, an import pressure detection circuit, an export pressure detection circuit, a FLASH storage circuit, an EEPROM storage circuit and a screen display circuit are connected to the microcontroller circuit;

[0006] The power supply circuit is connected with the NB_IoT wireless communication circuit, the import pressure detection circuit, the export pressure detection circuit, the FLASH storage circuit and the screen display circuit respectively;

[0007] The power supply circuit is used for power supply of the NB_IoT wireless communication circuit, the microcontroller circuit, the import pressure detection circuit, the export pressure detection circuit, the FLASH storage circuit and the screen display circuit;

[0008] The microcontroller circuit is used for providing data processing and control;

[0009] The import pressure detection circuit is used for converting the analog signal of import pressure value into digital signal;

[0010] The export pressure detection circuit is used for converting the analog signal of export pressure value into digital signal;

[0011] The FLASH storage circuit is used for storing the pressure value obtained by the import pressure detection circuit and the export pressure detection circuit;

[0012] The NB_IoT wireless communication circuit is used for transmitting digital signals of obtained pressure values of the import pressure detection circuit and the export pressure detection circuit to an external management platform.

[0013] The EEPROM storage circuit is used for storing system parameters.

[0014] The screen display circuit is used for displaying pressure values obtained by the import pressure detection circuit and the export pressure detection circuit.

[0015] The utility model also includes the following technical features.

[0016] The power supply circuit includes voltage stabilizing module U4, voltage stabilizing module U5, capacitor C4, capacitor C5, connecting seat CN1, wherein, the 1 foot of voltage stabilizing module U4 is grounded, and the 2 foot of voltage stabilifying module U4 is connected with the 4 foot of U5, one end of capacitor C4 and the 1 foot of connecting seat CN1 in common;The 3 foot of voltage stabilizing module U4 is connected with microcontroller circuit;The 5 foot of voltage stabilizing module U5 is connected with one end of capacitor C5 and NB-IoT communication circuit in common;The 3 foot of voltage stabilizing module U5 is connected with microcontroller circuit. The 2 foot of voltage stabilizing module U5, the second end of capacitor C4 and the second end of capacitor C5 are connected with the 2 foot of connecting seat CN1 in common and grounded.

[0017] The NB_IoT wireless communication circuit includes NB_IoT module U2, SIM card U1, resistance R1, antenna seat H1;Wherein, the 42 foot and the 43 foot of NB_IoT module U2 are connected with power supply circuit in common;The 35 foot of NB_IoT module U2 is connected with the 1 foot of antenna seat H1;The 17 foot of NB_IoT module U2 is connected with microcontroller circuit, and the 18 foot of NB_IoT module U2 is connected with microcontroller circuit;The 15 foot of NB_IoT module U2 is connected with microcontroller circuit through resistance R1;The 11 foot of NB_IoT module U2 is connected with the 3 foot of SIM card U1;The 12 foot of NB_IoT module U2 is connected with the 7 foot of SIM card U1;The 13 foot of NB_IoT module U2 is connected with the 6 foot of SIM card U1;The 14 foot of NB_IoT module U2 is connected with the 8 foot of SIM card U1;The 1 foot, 10 foot, 27 foot, 34 foot, 36 foot, 37 foot, 40 foot and 41 foot of NB_IoT module U2, the 1 foot of SIM card U1 and the 2 foot of antenna seat H1 are connected in common and grounded.

[0018] The import pressure detection circuit comprises an ADC conversion chip U7, a pressure sensor U9, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a capacitor C6, a capacitor C7, a capacitor C8, and a capacitor C9; wherein, the 1st pin of the ADC chip U7 is connected with the 8th pin of the ADC chip U7, one end of the capacitor C6, and the 1st pin of the sensor U9; the 3rd pin of the ADC chip U7 is connected with one end of the capacitor C7 and one end of the resistor R3, the second end of the resistor R3 is connected with the 3rd pin of the sensor U9; the 4th pin of the ADC chip U7 is connected with one end of the capacitor C9 and one end of the resistor R5, the second end of the resistor R5 is connected with the 2nd pin of the sensor U9; the 5th pin of the ADC chip U7 is connected with one end of the resistor R6, the second end of the resistor R6 is connected with the microcontroller circuit; the 6th pin of the ADC chip U7 is connected with one end of the resistor R4, the second end of the resistor R4 is connected with the microcontroller circuit; the 7th pin of the ADC chip U7 is connected with one end of the capacitor C8 and the power supply circuit; the 4th pin of the sensor U9, the 2nd pin of the ADC chip U7, the other end of the capacitor C7, the other end of the capacitor C9, the other end of the capacitor C6, and the other end of the capacitor C8 are connected together and grounded.

[0019] The export pressure detection circuit comprises an ADC conversion chip U2, a resistor R9, a resistor R10, a resistor R11, a resistor R12, a capacitor C10, a capacitor C11, a capacitor C12, a capacitor C13, and a sensor U14; wherein, the 1st pin and the 8th pin of the ADC chip U12 are connected with one end of the capacitor C10 and the 1st pin of the sensor U14; the 3rd pin of the ADC chip U12 is connected with one end of the capacitor C11 and one end of the resistor R9, the second end of the resistor R9 is connected with the 3rd pin of the sensor U14; the 4th pin of the ADC chip U12 is connected with one end of the capacitor C13 and one end of the resistor R11, the second end of the resistor R11 is connected with the 2nd pin of the sensor U14;

[0020] the 5th pin of the ADC chip U12 is connected with one end of the resistor R12, the second end of the resistor R12 is connected with the microcontroller circuit; the 6th pin of the ADC chip U12 is connected with one end of the resistor R10, the second end of the resistor R10 is connected with the microcontroller circuit;

[0021] the 7th pin of the ADC chip U12 is connected with one end of the capacitor C12 and the power supply circuit; the 4th pin of the sensor U14, the 2nd pin of the ADC chip U12, the other end of the capacitor C11, the other end of the capacitor C13, the other end of the capacitor C10, and the other end of the capacitor C12 are connected together and grounded.

[0022] The FLASH storage circuit comprises a FLASH chip U6, a resistor R2 and a triode Q1, wherein the 2th pin of the FLASH chip U6 is connected with the microcontroller circuit; the 3th pin, the 7th pin and the 8th pin of the FLASH chip U6 are connected with the emitter of the triode Q1; the 5th pin of the FLASH chip U6 is connected with the microcontroller circuit; the 6th pin of the FLASH chip U6 is connected with the 59th pin of the microcontroller U3; the base of the triode Q1 is connected with one end of the resistor R2, and the second end of the resistor R2 is connected with the microcontroller circuit; the collector of the triode Q1 is connected with the power supply circuit; the 1th pin and the 4th pin of the FLASH chip U6 are connected together and grounded.

[0023] The EEPROM storage circuit comprises a storage chip U13, a resistor R7 and a resistor R8, wherein the 1th pin, the 2th pin, the 3th pin, the 4th pin and the 7th pin of the storage chip U13 are grounded; the 8th pin of the storage chip U13 is connected with one end of the resistor R7, one end of the resistor R8 and the microcontroller circuit; the 6th pin of the storage chip U13 is connected with the second end of the resistor R7 and the microcontroller circuit; the 5th pin of the storage chip U12 is connected with the second end of the resistor R18 and the microcontroller circuit.

[0024] The screen display circuit comprises an LCD drive chip U10, a screen U11 and a voltage stabilizing chip U8, wherein the 1st pin, the 2nd pin and the 8th pin of the LCD drive chip U10 are connected with the 3rd pin of the voltage stabilizing chip U8; the 6th pin of the LCD drive chip U10 is connected with the microcontroller circuit; the 7th pin of the LCD drive chip U10 is connected with the microcontroller circuit; the 2nd pin of the voltage stabilizing chip U8 is connected with the positive pole of the battery; the 11th to 26th pins of the LCD drive chip U10 are connected with the 5th to 20th pins of the screen U11 in one-to-one correspondence respectively; the 61st to 64th pins of the LCD drive chip U10 are connected with the 1st to 4th pins of the screen U11 in one-to-one correspondence respectively; the 3rd pin, the 4th pin, the 5th pin, the 9th pin, the 10th pin of the LCD drive chip U10 and the 1st pin of the voltage stabilizing chip U8 are connected together and grounded.

[0025] Compared with the prior art, the utility model has the beneficial technical effect that:

[0026] (Ⅰ) The import pressure detection circuit and the export pressure detection circuit can immediately report the abnormal data before and after the gas pipeline valve to the management platform through the NB_IoT wireless communication circuit when detecting the pressure values before and after the gas pipeline valve and the pressure is abnormal, the management platform has a data model, can identify the pipe network state under different pressure conditions, and issues different pressure alarm strategies and parameters.

[0027] (II) Double-channel pressure monitoring is superior to single-point pressure monitoring in data accuracy, reliability, flexibility, efficiency and cost control, and is particularly suitable for application scenarios with high requirements for measurement accuracy and system reliability. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of the utility model.

[0029] Figure 2 It is a microcontroller circuit diagram.

[0030] Figure 3 It is a power supply circuit diagram.

[0031] Figure 4 It is an NB_IoT wireless communication circuit diagram.

[0032] Figure 5 It is an import pressure detection circuit diagram.

[0033] Figure 6 It is an export pressure detection circuit diagram.

[0034] Figure 7 It is a FLASH storage circuit diagram.

[0035] Figure 8 It is an EEPROM storage circuit diagram.

[0036] Figure 9 It is a screen display circuit diagram.

[0037] The specific content of the utility model is further explained and described in detail in combination with the embodiments below. DETAILED DESCRIPTION

[0038] It should be noted that all parts in the utility model, unless otherwise specified, use parts known in the art.

[0039] The following gives a specific embodiment of the utility model, it should be noted that the utility model is not limited to the following specific embodiments, any equivalent transformation based on the technical solutions of the present application falls within the scope of protection of the utility model.

[0040] See Figure 1 The application gives a hydrogenation gas pressure monitor, including microcontroller circuit, the microcontroller circuit is connected with power supply circuit, NB_IoT wireless communication circuit, import pressure detection circuit, export pressure detection circuit, FLASH storage circuit, EEPROM storage circuit and screen display circuit.

[0041] The power supply circuit is connected with the NB_IoT wireless communication circuit, the import pressure detection circuit, the export pressure detection circuit, the FLASH storage circuit and the screen display circuit respectively;

[0042] The power supply circuit is used for powering the NB_IoT wireless communication circuit, the microcontroller circuit, the import pressure detection circuit, the export pressure detection circuit, the FLASH storage circuit and the screen display circuit;

[0043] The microcontroller circuit is used for providing data processing and control;

[0044] The import pressure detection circuit is used for converting the analog signal of the import pressure value into a digital signal;

[0045] The export pressure detection circuit is used for converting the analog signal of the export pressure value into a digital signal;

[0046] The FLASH storage circuit is used for storing the pressure values obtained by the import pressure detection circuit and the export pressure detection circuit;

[0047] The NB_IoT wireless communication circuit is used for transmitting the digital signals of the pressure values obtained by the import pressure detection circuit and the export pressure detection circuit to an external management platform;

[0048] The EEPROM storage circuit is used for storing system parameters;

[0049] The screen display circuit is used for displaying the pressure values obtained by the import pressure detection circuit and the export pressure detection circuit.

[0050] In the above technical solution, the external 3.6V battery is reduced and stabilized to 3.3V through the power supply circuit, and is supplied to the controller circuit, the NB_IoT wireless communication circuit, the import pressure detection circuit, the export pressure detection circuit, the FLASH storage circuit and the screen display circuit. The microcontroller circuit reads the values output by the import and export pressure detection circuits according to the set time to calculate the pressure, and stores the import and export pressure values in the FLASH storage circuit. If the pressure exceeds the set value, the microcontroller circuit reads the stored pressure data and sends it to the management platform through the NB_IoT wireless communication circuit.

[0051] The import pressure detection circuit and the export pressure detection circuit can immediately report the abnormal data before and after the gas pipeline valve to the management platform through the NB_IoT wireless communication circuit when detecting the pressure values before and after the gas pipeline valve and the pressure is abnormal. The management platform has a data model and can identify the pipe network state under different pressure conditions and issue different pressure alarm strategies and parameters. The platform analyzes and predicts the pressure change of hydrogenated gas in the pipeline to optimize the operation and improve the efficiency, and solves the technical problems of complex hardware devices and wiring and low monitoring efficiency of the existing gas pressure monitor.

[0052] As shown in Figure 2 The microcontroller circuit adopts a controller U3 and peripheral circuits including a connecting seat P1, capacitors C1, C2, C3 and a crystal oscillator X1; wherein the 34th pin, 52nd pin, 54th pin of the microcontroller U3 and the 2nd pin of the voltage stabilizing module U4 in the power supply circuit are commonly connected; the 48th pin of the microcontroller is commonly connected with one end of the capacitor C3 and one end of the crystal oscillator X1; the 49th pin of the microcontroller is commonly connected with one end of the capacitor C2 and the other end of the crystal oscillator X1; the 50th pin of the microcontroller U3 is connected with one end of the capacitor C1. The second end of the capacitor C2, the second end of the capacitor C3, the second end of the capacitor C1 and the 33rd pin of the microcontroller U3 are grounded.

[0053] The microcontroller circuit is used to provide data processing and control for the system; wherein the U3 is used to process, store and upload the import and export pressures; the crystal oscillator X1, the capacitor C2 and the capacitor C3 provide a 32.768 kHz clock for the microcontroller. The capacitor C1 performs power filtering for the microcontroller.

[0054] The model of the microcontroller U3 and the connecting seat P1 is FM33LC026N and 5264-5P respectively. The values of the capacitor C1, the capacitor C2, the capacitor C3 and the crystal oscillator X1 are 4.7uF, 22pF, 22pF and 32.768K respectively.

[0055] Preferably, the battery input power supply adopts a single 3.6V lithium battery ES-341550 / W.

[0056] As shown in Figure 3 The power supply circuit includes a voltage stabilizing module U4, a voltage stabilizing module U5, capacitors C4 and C5 and a connecting seat CN1; wherein the 1st pin of the voltage stabilizing module U4 is grounded, the 2nd pin of the voltage stabilizing module U4 is commonly connected with the 4th pin of the U5, one end of the capacitor C4 and the 1st pin of the connecting seat CN1; the 3rd pin of the voltage stabilizing module U4 is connected with the microcontroller circuit; the 5th pin of the voltage stabilizing module U5 is commonly connected with one end of the capacitor C5 and the NB-IoT communication circuit; the 3rd pin of the voltage stabilizing module U5 is connected with the microcontroller circuit. The 2nd pin of the voltage stabilizing module U5, the second end of the capacitor C4 and the second end of the capacitor C5 are commonly connected with the 2nd pin of the connecting seat CN1 and grounded.

[0057] Specifically, the 5th pin of the voltage stabilizing module U5 is connected with the 42nd pin and the 43rd pin of the NB_IoT module U2 of the NB-IoT communication circuit and provides a 3.3V power supply for the NB-IoT communication circuit; the 3rd pin of the voltage stabilizing module U5 is connected with the 7th pin of the microcontroller U3; the 3rd pin of the voltage stabilizing module U4 is commonly connected with the 52nd pin and the 54th pin of the microcontroller U3 and provides a 3.3V power supply for the microcontroller circuit.

[0058] The power supply circuit is used for supplying power for the NB_IoT wireless communication circuit, the microcontroller circuit, the import pressure detection circuit, the export pressure detection circuit, the FLASH storage circuit and the screen display circuit. The voltage stabilizing module U4 is an LDO type voltage stabilizing circuit, which is used for stabilizing the input power supply to 3.3V for output; the voltage stabilizing module U5 is an LDO type voltage stabilizing circuit, which is used for stabilizing the input power supply to 3.3V for output; the capacitor C4 and the capacitor C5 filter the input and output power supply of the voltage stabilizing chip U5.

[0059] The models of the voltage stabilizing chip U4, the voltage stabilizing chip U5 and the connecting seat CN1 are 6250-33C, MD7218E33 and 5264-2P respectively. The values of the capacitor C4 and the capacitor C5 are 100uF and 100uF respectively.

[0060] As shown in Figure 4 The NB_IoT wireless communication circuit includes the NB_IoT module U2, the SIM card U1, the resistor R1 and the antenna seat H1. The 42th pin and the 43th pin of the NB_IoT module U2 are connected with the power supply circuit. The 35th pin of the NB_IoT module U2 is connected with the 1th pin of the antenna seat H1. The 17th pin of the NB_IoT module U2 is connected with the microcontroller circuit, and the 18th pin of the NB_IoT module U2 is connected with the microcontroller circuit. The 15th pin of the NB_IoT module U2 is connected with the microcontroller circuit through the resistor R1. The 11th pin of the NB_IoT module U2 is connected with the 3th pin of the SIM card U1. The 12th pin of the NB_IoT module U2 is connected with the 7th pin of the SIM card U1. The 13th pin of the NB_IoT module U2 is connected with the 6th pin of the SIM card U1. The 14th pin of the NB_IoT module U2 is connected with the 8th pin of the SIM card U1. The 1th pin, the 10th pin, the 27th pin, the 34th pin, the 36th pin, the 37th pin and the 40th pin of the NB_IoT module U2, the 41th pin of the NB_IoT module U2, the 1th pin of the SIM card U1 and the 2th pin of the antenna seat H1 are connected with the ground.

[0061] Specifically, the 42th pin and the 43th pin of the NB_IoT module U2 are connected with the 5th pin of the voltage stabilizing module U5. The 17th pin of the NB_IoT module U2 is connected with the 3th pin of the microcontroller U3. The 18th pin of the NB_IoT module U2 is connected with the 2th pin of the microcontroller U3. The 15th pin of the NB_IoT module U2 is connected with the 8th pin of the microcontroller U3 through the resistor R1.

[0062] In the above technical solution, the SIM card provides a unique identity number for system networking.

[0063] The models of the NB_IoT module U2, the SIM card U1 and the antenna seat H1 are BC28-CNV, China Telecom Internet of Things card and IPXE antenna seat respectively. The value of the resistor R1 is 1K.

[0064] SeeFigure 5 As shown, the inlet pressure detection circuit includes an ADC conversion chip U7, a pressure sensor U9, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a capacitor C6, a capacitor C7, a capacitor C8, and a capacitor C9. The pin 1 of the ADC chip U7 is connected to the pin 8 of the ADC chip U7, one end of the capacitor C6, and the pin 1 of the sensor U9. The pin 3 of the ADC chip U7 is connected to one end of the capacitor C7 and one end of the resistor R3. The second end of the resistor R3 is connected to the pin 3 of the sensor U9. The pin 4 of the ADC chip U7 is connected to one end of the capacitor C9 and one end of the resistor R5. The second end of the resistor R5 is connected to the pin 2 of the sensor U9. The pin 5 of the ADC chip U7 is connected to one end of the resistor R6. The second end of the resistor R6 is connected to the microcontroller circuit. The pin 6 of the ADC chip U7 is connected to one end of the resistor R4. The second end of the resistor R4 is connected to the microcontroller circuit. The pin 7 of the ADC chip U7 is connected to one end of the capacitor C8 and the power supply circuit. The pin 4 of the sensor U9, the pin 2 of the ADC chip U7, the other end of the capacitor C7, the other end of the capacitor C9, the other end of the capacitor C6, and the other end of the capacitor C8 are connected to ground.

[0065] In the above technical solution, the inlet pressure detection circuit is used to convert the analog signal of the pressure value into a digital signal. The resistor R3 and the resistor R5 are current limiting resistors of the pressure sensor. The resistor R4 and the resistor R6 are current limiting resistors of the output signal of the ADC conversion chip U7. The capacitor C7 and the capacitor C9 are used to filter the analog signal of the pressure sensor. The capacitor C8 is used to filter the input power of the ADC conversion chip U7. The capacitor C6 is used to filter the input power of the pressure sensor U9.

[0066] Specifically, the pin 5 of the ADC chip U7 is connected to one end of the resistor R6. The second end of the resistor R6 is connected to the pin 27 of the microcontroller U3. The pin 6 of the ADC chip U7 is connected to one end of the resistor R4. The second end of the resistor R4 is connected to the pin 28 of the microcontroller U3. The pin 7 of the ADC chip U7 is connected to one end of the capacitor C8 and the pin 1 of the voltage stabilizing module U4 in the power supply circuit.

[0067] The model of the ADC conversion chip U7 and the pressure sensor are CS1237 and MPM281, respectively. The values of the resistor R3, the resistor R4, the resistor R5, the resistor R6, the capacitor C6, the capacitor C7, the capacitor C8, and the capacitor C9 are 1K, 1K, 1K, 1K, 100nF, 100nF, 100nF, and 100nF, respectively.

[0068] See Figure 6As shown, the outlet pressure detection circuit includes an ADC conversion chip U2, a resistor R9, a resistor R10, a resistor R11, a resistor R12, a capacitor C10, a capacitor C11, a capacitor C12, a capacitor C13, and a sensor U14; wherein the 1st pin and the 8th pin of the ADC chip U12 are commonly connected with one end of the capacitor C10 and the 1st pin of the sensor U14; the 3rd pin of the ADC chip U12 is commonly connected with one end of the capacitor C11 and one end of the resistor R9, and the second end of the resistor R9 is connected with the 3rd pin of the sensor U14; the 4th pin of the ADC chip U12 is commonly connected with one end of the capacitor C13 and one end of the resistor R11, and the second end of the resistor R11 is connected with the 2nd pin of the sensor U14;

[0069] The 5th pin of the ADC chip U12 is connected with one end of the resistor R12, and the second end of the resistor R12 is connected with the microcontroller circuit; the 6th pin of the ADC chip U12 is connected with one end of the resistor R10, and the second end of the resistor R10 is connected with the microcontroller circuit;

[0070] The 7th pin of the ADC chip U12 is connected with one end of the capacitor C12 and the power supply circuit; the 4th pin of the sensor U14, the 2nd pin of the ADC chip U12, the other end of the capacitor C11, the other end of the capacitor C13, the other end of the capacitor C10, and the other end of the capacitor C12 are commonly connected and grounded.

[0071] In the above technical solution, the outlet pressure detection circuit is used to convert the analog signal of the pressure value into a digital signal. Among them, the resistor R9 and the resistor R11 are current limiting resistors of the pressure sensor, and the resistor R10 and the resistor R12 are current limiting resistors of the output signal of the ADC conversion chip U7. The capacitor C11 and the capacitor C13 are used to filter the analog signal of the pressure sensor. The capacitor C12 is used to filter the power input of the ADC conversion chip U12. The capacitor C10 is used to filter the power input of the pressure sensor U14.

[0072] Specifically, the 5th pin of the ADC chip U12 is connected with one end of the resistor R12, and the second end of the resistor R12 is connected with the 29th pin of the microcontroller U3; the 6th pin of the ADC chip U12 is connected with one end of the resistor R10, and the second end of the resistor R10 is commonly connected with the 30th pin of the microcontroller U3; the 7th pin of the ADC chip U12 is connected with one end of the capacitor C12 and the 1st pin of the voltage stabilizing module U4 in the power supply circuit;

[0073] The model of the ADC conversion chip U7 and the pressure sensor is CS1237 and MPM281 respectively. The values of the resistor R9, the resistor R10, the resistor R11, the resistor R12, the capacitor C10, the capacitor C11, the capacitor C12, and the capacitor C13 are 1K, 1K, 1K, 1K, 100nF, 100nF, 100nF, and 100nF respectively.

[0074] See Figure 7As shown in the figure, the FLASH storage circuit includes a FLASH chip U6, a resistor R2, and a triode Q1; wherein the 2-pin of the FLASH chip U6 is connected with the microcontroller circuit; the 3-pin, 7-pin, and 8-pin of the FLASH chip U6 are collectively connected with the emitter of the triode Q1; the 5-pin of the FLASH chip U6 is connected with the microcontroller circuit; the 6-pin of the FLASH chip U6 is connected with the 59-pin of the microcontroller U3; the base of the triode Q1 is connected with one end of the resistor R2, and the second end of the resistor R2 is connected with the microcontroller circuit; the collector of the triode Q1 is connected with the power supply circuit; the 1-pin and 4-pin of the FLASH chip U6 are collectively connected and grounded.

[0075] In the above technical solution, the FLASH chip is used to store the pressure data of the import and export. The resistor R2 is a current-limiting resistor for the base of the triode Q1. The triode Q1 is a power supply switch triode for the FLASH chip U6.

[0076] The 2-pin of the FLASH chip U6 is connected with the 60-pin of the microcontroller U3; the 5-pin of the FLASH chip U6 is connected with the 61-pin of the microcontroller U3; the second end of the resistor R2 is connected with the 58-pin of the microcontroller U3. The collector of the triode Q1 is connected with the 3-pin of the voltage stabilizing module U4 in the power supply circuit.

[0077] The model numbers of the FLASH chip U6 and the triode Q1 are W25Q128JVSIQ and SS8050 respectively. The value of the resistor R2 is 1K.

[0078] See Figure 8 As shown in the figure, the EEPROM storage circuit includes a storage chip U13, a resistor R7, and a resistor R8, wherein the 1-pin, 2-pin, 3-pin, 4-pin, and 7-pin of the storage chip U13 are grounded; the 8-pin of the storage chip U13 is collectively connected with one end of the resistor R7, one end of the resistor R8, and the microcontroller circuit; the 6-pin of the storage chip U13 is collectively connected with the second end of the resistor R7 and the microcontroller circuit; the 5-pin of the storage chip U12 is collectively connected with the second end of the resistor R18 and the microcontroller circuit.

[0079] In the above technical solution, the EEPROM chip U13 stores system parameters, and the resistors R7 and R8 are pull-up resistors for the EEPROM chip signal.

[0080] Specifically, the 8-pin of the storage chip U13 is collectively connected with one end of the resistor R7, one end of the resistor R8, and the 15-pin of the microcontroller U3; the 6-pin of the storage chip U13 is collectively connected with the second end of the resistor R7 and the 16-pin of the microcontroller U3; the 5-pin of the storage chip U12 is collectively connected with the second end of the resistor R18 and the 17-pin of the microcontroller U3.

[0081] The model of the EEPROM chip U13 is FM24C02. The resistance R7 and the resistance R8 are respectively 10K and 10K.

[0082] See Figure 9 As shown in the figure, the screen display circuit comprises the LCD drive chip U10, the screen U11 and the voltage stabilizing chip U8, wherein the pin 1, the pin 2 and the pin 8 of the LCD drive chip U10 are connected with the pin 3 of the voltage stabilizing chip U8; the pin 6 of the LCD drive chip U10 is connected with the microcontroller circuit; the pin 7 of the LCD drive chip U10 is connected with the microcontroller circuit; the pin 2 of the voltage stabilizing chip U8 is connected with the positive pole of the battery; the pin 11 to the pin 26 of the LCD drive chip U10 are respectively connected with the pin 5 to the pin 20 of the screen U11 one by one; the pin 61 to the pin 64 of the LCD drive chip U10 are respectively connected with the pin 1 to the pin 4 of the screen U11 one by one; the pin 3, the pin 4, the pin 5, the pin 9 and the pin 10 of the LCD drive chip U10 and the pin 1 of the voltage stabilizing chip U8 are commonly connected and grounded.

[0083] In the above technical solution, the LCD drive chip is used for driving the screen. The voltage stabilizing module U8 provides 3.0V power supply for the LCD drive chip. The screen U11 is used for displaying the data of the import and export pressure.

[0084] The pin 6 of the LCD drive chip U10 is connected with the pin 20 of the microcontroller U3; the pin 7 of the LCD drive chip U10 is connected with the pin 21 of the microcontroller U3;

[0085] The model of the LCD drive chip U10, the voltage stabilizing chip U8 and the screen U11 is respectively BU9799KV-E2, MD7218A30 and D51799A-6HPPR.

Claims

1. A hydrogen gas pressure monitor, comprising a microcontroller circuit, a power supply circuit, an NB_IoT wireless communication circuit, an import pressure detection circuit, an export pressure detection circuit, a FLASH storage circuit, an EEPROM storage circuit and a screen display circuit connected to the microcontroller circuit; the power supply circuit is connected to the NB_IoT wireless communication circuit, the import pressure detection circuit, the export pressure detection circuit, the FLASH storage circuit and the screen display circuit respectively; the power supply circuit is used to power the NB_IoT wireless communication circuit, the microcontroller circuit, the import pressure detection circuit, the export pressure detection circuit, the FLASH storage circuit and the screen display circuit; the microcontroller circuit is used to provide data processing and control; the import pressure detection circuit is used to convert the analog signal of the import pressure value into a digital signal; the export pressure detection circuit is used to convert the analog signal of the export pressure value into a digital signal; the FLASH storage circuit is used to store the pressure values obtained by the import pressure detection circuit and the export pressure detection circuit; the NB_IoT wireless communication circuit is used to transmit the digital signals of the pressure values obtained by the import pressure detection circuit and the export pressure detection circuit to an external management platform; the EEPROM storage circuit is used to store system parameters; the screen display circuit is used to display the pressure values obtained by the import pressure detection circuit and the export pressure detection circuit.

2. The hydrogen gas pressure monitor according to claim 1, wherein The power supply circuit comprises a voltage stabilizing module U4, a voltage stabilizing module U5, a capacitor C4, a capacitor C5 and a connecting seat CN1, wherein the 1 pin of the voltage stabilizing module U4 is grounded, the 2 pin of the voltage stabilizing module U4 is commonly connected with the 4 pin of the U5, one end of the capacitor C4 and the 1 pin of the connecting seat CN1; the 3 pin of the voltage stabilizing module U4 is connected with the microcontroller circuit; the 5 pin of the voltage stabilizing module U5 is commonly connected with one end of the capacitor C5 and the NB-IoT communication circuit; the 3 pin of the voltage stabilizing module U5 is connected with the microcontroller circuit, the 2 pin of the voltage stabilizing module U5, the second end of the capacitor C4 and the second end of the capacitor C5 are commonly connected with the 2 pin of the connecting seat CN1 and grounded.

3. The hydrogen gas pressure monitor of claim 1, wherein The NB_IoT wireless communication circuit comprises an NB_IoT module U2, a SIM card U1, a resistor R1 and an antenna seat H1; wherein the 42th pin and the 43th pin of the NB_IoT module U2 are connected with the power circuit; the 35th pin of the NB_IoT module U2 is connected with the 1st pin of the antenna seat H1; the 17th pin of the NB_IoT module U2 is connected with the microcontroller circuit, and the 18th pin of the NB_IoT module U2 is connected with the microcontroller circuit; the 15th pin of the NB_IoT module U2 is connected with the microcontroller circuit through the resistor R1; the 11th pin of the NB_IoT module U2 is connected with the 3rd pin of the SIM card U1; the 12th pin of the NB_IoT module U2 is connected with the 7th pin of the SIM card U1; the 13th pin of the NB_IoT module U2 is connected with the 6th pin of the SIM card U1; the 14th pin of the NB_IoT module U2 is connected with the 8th pin of the SIM card U1; the 1st pin, the 10th pin, the 27th pin, the 34th pin, the 36th pin, the 37th pin and the 40th pin of the NB_IoT module U2, the 41st pin, the 1st pin of the SIM card U1 and the 2nd pin of the antenna seat H1 are connected with the ground.

4. The hydrogen gas pressure monitor of claim 1, wherein The import pressure detection circuit comprises an ADC conversion chip U7, a pressure sensor U9, resistors R3, R4, R5, R6, capacitors C6, C7, C8 and C9; wherein the 1st pin of the ADC chip U7 is connected with the 8th pin of the ADC chip U7, one end of the capacitor C6 and the 1st pin of the sensor U9; the 3rd pin of the ADC chip U7 is connected with one end of the capacitor C7 and one end of the resistor R3, the second end of the resistor R3 is connected with the 3rd pin of the sensor U9; the 4th pin of the ADC chip U7 is connected with one end of the capacitor C9 and one end of the resistor R5, the second end of the resistor R5 is connected with the 2nd pin of the sensor U9; the 5th pin of the ADC chip U7 is connected with one end of the resistor R6, the second end of the resistor R6 is connected with the microcontroller circuit; the 6th pin of the ADC chip U7 is connected with one end of the resistor R4, the second end of the resistor R4 is connected with the microcontroller circuit; the 7th pin of the ADC chip U7 is connected with one end of the capacitor C8 and the power circuit; the 4th pin of the sensor U9, the 2nd pin of the ADC chip U7, the other end of the capacitor C7, the other end of the capacitor C9, the other end of the capacitor C6 and the other end of the capacitor C8 are connected with the ground.

5. The hydrogen gas pressure monitor of claim 1, wherein The export pressure detection circuit comprises an ADC conversion chip U2, resistors R9, R10, R11, R12, capacitors C10, C11, C12 and C13, and a sensor U14; wherein the 1st pin and the 8th pin of the ADC chip U12 are connected with one end of the capacitor C10 and the 1st pin of the sensor U14; the 3rd pin of the ADC chip U12 is connected with one end of the capacitor C11 and one end of the resistor R9, the second end of the resistor R9 is connected with the 3rd pin of the sensor U14; the 4th pin of the ADC chip U12 is connected with one end of the capacitor C13 and one end of the resistor R11, the second end of the resistor R11 is connected with the 2nd pin of the sensor U14; The 5th pin of the ADC chip U12 is connected with one end of the resistor R12, and the second end of the resistor R12 is connected with the microcontroller circuit; the 6th pin of the ADC chip U12 is connected with one end of the resistor R10, and the second end of the resistor R10 is connected with the microcontroller circuit; the 7th pin of the ADC chip U12 is connected with one end of the capacitor C12 and the power supply circuit; the 4th pin of the sensor U14, the 2nd pin of the ADC chip U12, the other end of the capacitor C11, the other end of the capacitor C13, the other end of the capacitor C10 and the other end of the capacitor C12 are connected together and grounded.

6. The hydrogen gas pressure monitor of claim 1, wherein The FLASH storage circuit comprises a FLASH chip U6, a resistor R2 and a triode Q1; wherein the 2nd pin of the FLASH chip U6 is connected with the microcontroller circuit; the 3rd pin, the 7th pin and the 8th pin of the FLASH chip U6 are connected with the emitter of the triode Q1 together; the 5th pin of the FLASH chip U6 is connected with the microcontroller circuit; the 6th pin of the FLASH chip U6 is connected with the 59th pin of the microcontroller U3; the base of the triode Q1 is connected with one end of the resistor R2, and the second end of the resistor R2 is connected with the microcontroller circuit; the collector of the triode Q1 is connected with the power supply circuit; the 1st pin and the 4th pin of the FLASH chip U6 are connected together and grounded.

7. The hydrogen gas pressure monitor of claim 1, wherein The EEPROM storage circuit comprises a storage chip U13, a resistor R7 and a resistor R8; wherein the 1st pin, the 2nd pin, the 3rd pin, the 4th pin and the 7th pin of the storage chip U13 are grounded; the 8th pin of the storage chip U13 is connected with one end of the resistor R7, one end of the resistor R8 and the microcontroller circuit together; the 6th pin of the storage chip U13 is connected with the second end of the resistor R7 and the microcontroller circuit together; the 5th pin of the storage chip U12 is connected with the second end of the resistor R18 and the microcontroller circuit together.

8. The hydrogen gas pressure monitor of claim 1, wherein The screen display circuit comprises an LCD drive chip U10, a screen U11 and a voltage stabilizing chip U8; wherein the 1st pin, the 2nd pin and the 8th pin of the LCD drive chip U10 are connected with the 3rd pin of the voltage stabilizing chip U8 together; the 6th pin of the LCD drive chip U10 is connected with the microcontroller circuit; the 7th pin of the LCD drive chip U10 is connected with the microcontroller circuit; the 2nd pin of the voltage stabilizing chip U8 is connected with the positive pole of the battery; the 11th pin to the 26th pin of the LCD drive chip U10 are respectively connected with the 5th pin to the 20th pin of the screen U11 one by one; the 61st pin to the 64th pin of the LCD drive chip U10 are respectively connected with the 1st pin to the 4th pin of the screen U11 one by one; the 3rd pin, the 4th pin, the 5th pin, the 9th pin, the 10th pin of the LCD drive chip U10 and the 1st pin of the voltage stabilizing chip U8 are connected together and grounded.

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