CN213634169U

CN213634169U - Intelligent control pneumatic sensor

Info

Publication number: CN213634169U
Application number: CN202023274506.1U
Authority: CN
Inventors: 王进升; 吴克军; 王卫国; 王京港; 张翠平
Original assignee: Jiangsu Shilimu Intelligent Measurement And Control Technology Co ltd
Current assignee: Jiangsu Shilimu Intelligent Measurement And Control Technology Co ltd
Priority date: 2020-12-30
Filing date: 2020-12-30
Publication date: 2021-07-06
Anticipated expiration: 2030-12-30

Abstract

The utility model relates to an intelligent control pneumatic sensor, which comprises a pneumatic detection circuit, a processor IC1, an ozone detection circuit, an alarm circuit, a voltage detection circuit and a zero setting circuit, wherein the pneumatic detection circuit comprises a pneumatic resistor R15, a negative temperature coefficient compensation resistor R14 and a positive temperature coefficient compensation resistor R13; the non-inverting input end of the operational amplifier U1 is grounded through a wind-sensitive resistor R15, the output end of the operational amplifier U1 is connected with the base electrode of a triode Q3 through a resistor R17, and the collector electrode of the triode Q3 is connected with the P2.4 port of a processor IC1 through a resistor R21; the ozone detection circuit comprises an ozone sensor CT, wherein the C end of the ozone sensor CT is connected with the inverting input end of an operational amplifier U2, the output end of an operational amplifier U2 is connected with the R end of the ozone sensor CT, the W end of the ozone generator is connected with the inverting input end of an operational amplifier U3 through a resistor R5, and the output end of the operational amplifier U3 is also connected with the P2.2 port of a processor IC 1. Can be operated reliably and safely without being held by people.

Description

Intelligent control pneumatic sensor

Technical Field

The utility model relates to an intelligent control pneumatic sensor belongs to pneumatic sensor technical field.

Background

The pneumatic sensor is a control product which sends out a control signal when detecting the state of wind flow. The device is generally applied to air purifiers, central air conditioners, ultraviolet lamps and other devices requiring ventilation and wind flow detection.

In the process of starting up a traditional pneumatic sensor, because the time of heating the PTC to the Curie point temperature cannot be eliminated, an output signal is always in a conducting state within a period of time when the sensor is electrified, a subsequent power module can be started in a windless state, inconvenience is brought to customer service use, and because the working environment of the pneumatic sensor is in an unattended state, when a working power supply of the sensor is in an abnormal working state, normal detection and control functions can be influenced; the output signal cannot change along with the change of the input signal; under some occasions, the high-voltage circuit for output control generates ozone, and the ozone is harmful to human bodies when the concentration of the ozone is too high; the change of the ambient temperature causes the logic control of the output signal to be affected; the current pneumatic sensor can not meet the requirements of partial customers on a timing switch and a reservation switch.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an intelligent control pnematic sensor can realize under unmanned on duty's state, and the sensor can be reliable safe operation still.

In order to solve the technical problem, the utility model discloses a pneumatic sensor of intelligent control, including pneumatic detection circuitry, still include treater IC1, ozone detection circuitry, alarm circuit, voltage detection circuitry and zero setting circuit, treater IC1 is STC12C5404AD chip, pneumatic detection circuitry includes air resistor R15, negative temperature coefficient compensation resistance R14 and positive temperature coefficient compensation resistance R13, and operational amplifier U1's inverting input passes through negative temperature coefficient compensation resistance R14 ground connection, and links to each other with adjustable potentiometer RW 1's regulation end; the non-inverting input end of the operational amplifier U1 is grounded through a wind-sensitive resistor R15 and is connected with +12V through a positive temperature coefficient compensation resistor R13, the output end of the operational amplifier U1 is connected with the base electrode of a triode Q3 through a resistor R17, and the collector electrode of a triode Q3 is connected with the P2.4 port of a processor IC1 through a resistor R21; the ozone detection circuit comprises an ozone sensor CT, wherein the C end of the ozone sensor CT is connected with the inverting input end of an operational amplifier U2, the output end of an operational amplifier U2 is connected with the R end of the ozone sensor CT, the W end of the ozone generator is connected with the inverting input end of an operational amplifier U3 through a resistor R5, the non-inverting input end of the operational amplifier U3 is grounded through a resistor R6, the output end of an operational amplifier U3 is connected with the inverting input end of the operational amplifier U3 through a resistor R7, and the output end of an operational amplifier U3 is further connected with the P2.2 port of a processor IC 1.

Further, the zero setting circuit comprises triodes Q1, Q2 and Q4, a P2.0 port of a processor IC1 is connected with a base electrode of a triode Q1 through a resistor R8, an emitter electrode of a triode Q1 is connected with +5V, a collector electrode of the triode Q1 is connected with a base electrode of a triode Q2 through a resistor R11, a collector electrode of the triode Q2 is connected with 12V voltage through a diode D4, two ends of the diode D4 are connected with a coil of a relay J1 in parallel, and two ends of a normally open contact of the relay J1 are connected with a pneumatic load through a P1_1 port and an F-1 port; the collector of the triode Q2 is connected with the base of the triode Q4 through a resistor R4, the collector of the triode Q4 is connected with the P2.5 port of the processor IC1 through a resistor R23, and the normally open contact of the relay J1 is also connected with the normally open contact of the relay J2 and the buzzer SP1 in series; the P1.5 port of the processor IC1 is connected with the base electrode of a triode Q5 through a resistor R28, the collector electrode of the triode Q5 is connected with the base electrode of a triode Q6 through a resistor R30, the collector electrode of a triode Q6 is connected with +12V through a diode D3, and two ends of the diode D3 are connected with the coil of the relay J2 in parallel.

Further, the voltage detection circuit comprises a resistor R24, a resistor R26, a temperature-sensitive resistor R25 and a temperature-sensitive resistor R27, wherein one end of the resistor R24 is connected with +12V, the other end of the resistor R24 is connected with the temperature-sensitive resistor R25 in series and is connected with a P2.6 port of the processor IC1, and the other end of the temperature-sensitive resistor R25 is grounded; one end of the resistor R26 is connected with +12V, the other end of the resistor R26 is connected with the temperature-sensitive resistor R27 in series and is connected with the P2.7 port of the processor IC1, and the other end of the temperature-sensitive resistor R27 is grounded.

Further, the power supply module comprises an AC/DC converter P2 and an AC/DC converter P1, wherein the L end of the 220V alternating current power supply is connected with pin 1 of the AC/DC converter P2 and the AC/DC converter P1 through a key switch S1 and a fuse FU1 respectively, the N end of the 220V alternating current power supply is connected with pin 3 of the AC/DC converter P2 and the AC/DC converter P1, pin 2 and pin 4 of the AC/DC converter P2 are respectively a +12V voltage output end and a-12V voltage output end, pin 2 of the AC/DC converter P1 is connected with the Vin port of the DC/DC converter P3, pin 4 of the AC/DC converter P1 is connected with the GND port of the DC/DC converter, and the Vout port of the DC/DC converter P3 is a +5V voltage output end.

The utility model has the advantages that: 1. the resistance value of the wind-sensitive resistor R15 changes along with the change of the wind strength and is transmitted to the processor IC1 through the wind-sensitive detection circuit, the processor calculates the current wind force value once every 500ms, and when the wind force signal detected by the wind-sensitive detection circuit does not accord with the theoretical value preset in the processor IC1 continuously for 10 times, the processor IC1 gives an alarm through the alarm circuit;

the ozone sensor CT detects the ozone concentration around the pneumatic sensor and transmits the ozone concentration to the processor IC1 through the ozone detection circuit, the processor IC1 controls the ozone sensor to stop working, the processor IC1 is set to zero through the zero setting circuit, the signal output is suspended, and the pneumatic sensor is restarted after the ozone concentration is recovered to be normal;

the voltage detection circuit is used for detecting the voltage of the processor, a standard voltage value is set in the processor IC1, when the error between the voltage detected by the voltage detection circuit and the standard voltage value is larger than 20%, the pneumatic sensor stops working, and the processor IC1 gives an alarm through the alarm circuit.

2. The resistance values of the temperature-sensitive resistor R13 and the temperature-sensitive resistor R14 change along with the temperature change, so that the condition that the parameter of the pneumatic sensor is drifted due to the environmental temperature and the control of the pneumatic sensor on the pneumatic load is influenced is avoided.

3. The processor IC1 performs scheduled on-off and timed on-off on the pneumatic sensor through an internal clock function.

4. The zero setting circuit aims at the power-on process of the pneumatic sensor, the pneumatic sensor needs a heating process when reaching the Curie point temperature, and in the heating process, when signals of an F-1 port and a P1-1 port show the consistency with signals when wind flows on the surface of the wind-sensitive resistor, the power output is increased; meanwhile, the duration of time for the pneumatic sensor to reach the Curie point temperature is measured according to the service environment of the pneumatic sensor, and the power-on time of the pneumatic sensor is set through the processor IC1, so that the input signal is not influenced by signals, and the control circuit is prevented from being started by mistake.

Drawings

Fig. 1 is a schematic circuit diagram of the present invention;

fig. 2 is a schematic circuit diagram of the middle power supply module of the present invention.

Detailed Description

The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic drawings and illustrate the basic structure of the present invention only in a schematic manner, and thus show only the components related to the present invention.

As shown in fig. 1, the intelligent control pneumatic sensor comprises a pneumatic detection circuit, a processor IC1, an ozone detection circuit, an alarm circuit, a voltage detection circuit and a zero setting circuit, wherein the processor IC1 is an STC12C5404AD chip, the pneumatic detection circuit comprises a pneumatic resistor R15, a negative temperature coefficient compensation resistor R14 and a positive temperature coefficient compensation resistor R13, and the inverting input end of an operational amplifier U1 is grounded through the negative temperature coefficient compensation resistor R14 and is connected with the adjusting end of an adjustable potentiometer RW 1; the non-inverting input end of the operational amplifier U1 is grounded through a wind-sensitive resistor R15 and is connected with +12V through a positive temperature coefficient compensation resistor R13, the output end of the operational amplifier U1 is connected with the base electrode of a triode Q3 through a resistor R17, and the collector electrode of a triode Q3 is connected with the P2.4 port of a processor IC1 through a resistor R21; the ozone detection circuit comprises an ozone sensor CT, wherein the C end of the ozone sensor CT is connected with the inverting input end of an operational amplifier U2, the output end of an operational amplifier U2 is connected with the R end of the ozone sensor CT, the W end of the ozone generator is connected with the inverting input end of an operational amplifier U3 through a resistor R5, the non-inverting input end of the operational amplifier U3 is grounded through a resistor R6, the output end of an operational amplifier U3 is connected with the inverting input end of the operational amplifier U3 through a resistor R7, and the output end of an operational amplifier U3 is further connected with the P2.2 port of a processor IC 1.

The zero setting circuit comprises triodes Q1, Q2 and Q4, a P2.0 port of a processor IC1 is connected with a base electrode of a triode Q1 through a resistor R8, an emitter electrode of a triode Q1 is connected with +5V, a collector electrode of the triode Q1 is connected with a base electrode of a triode Q2 through a resistor R11, a collector electrode of the triode Q2 is connected with 12V voltage through a diode D4, two ends of the diode D4 are connected with a coil of a relay J1 in parallel, and two ends of a normally open contact of the relay J1 are connected with a pneumatic load through a P1_1 port and an F-1 port; the collector of the triode Q2 is connected with the base of the triode Q4 through a resistor R4, the collector of the triode Q4 is connected with the P2.5 port of the processor IC1 through a resistor R23, and the normally open contact of the relay J1 is also connected with the normally open contact of the relay J2 and the buzzer SP1 in series; the P1.5 port of the processor IC1 is connected with the base electrode of a triode Q5 through a resistor R28, the collector electrode of the triode Q5 is connected with the base electrode of a triode Q6 through a resistor R30, the collector electrode of a triode Q6 is connected with +12V through a diode D3, and two ends of the diode D3 are connected with the coil of a relay J2 in parallel.

The voltage detection circuit comprises a resistor R24, a resistor R26, a temperature-sensitive resistor R25 and a temperature-sensitive resistor R27, wherein one end of the resistor R24 is connected with +12V, the other end of the resistor R24 is connected with the temperature-sensitive resistor R25 in series and is connected with a P2.6 port of the processor IC1, and the other end of the temperature-sensitive resistor R25 is grounded; one end of the resistor R26 is connected with +12V, the other end of the resistor R26 is connected with the temperature-sensitive resistor R27 in series and is connected with the P2.7 port of the processor IC1, and the other end of the temperature-sensitive resistor R27 is grounded.

As shown in fig. 2, the power supply module further includes a power supply module, the power supply module includes an AC/DC converter P2 and an AC/DC converter P1, the L terminal of the 220V AC power is connected to pin 1 of the AC/DC converter P2 and the AC/DC converter P1 through a key switch S1 and a fuse FU1, respectively, the N terminal of the 220V AC power is connected to pin 3 of the AC/DC converter P2 and the AC/DC converter P1, pin 2 and pin 4 of the AC/DC converter P2 are a +12V voltage output terminal and a-12V voltage output terminal, pin 2 of the AC/DC converter P1 is connected to the Vin port of the DC/DC converter P3, pin 4 of the AC/DC converter P1 is connected to the GND port of the DC/DC converter, and the Vout port of the DC/DC converter P3 is a +5V voltage output terminal.

The resistance value of the wind-sensitive resistor R15 changes along with the change of the wind strength and is transmitted to the processor IC1 through the wind-sensitive detection circuit, the processor calculates the current wind force value once every 500ms, and when the wind force signal detected by the wind-sensitive detection circuit does not accord with the theoretical value preset in the processor IC1 continuously for 10 times, the processor IC1 gives an alarm through the alarm circuit; the ozone sensor CT detects the ozone concentration around the pneumatic sensor and transmits the ozone concentration to the processor IC1 through the ozone detection circuit, the processor IC1 controls the ozone sensor to stop working, the processor IC1 is set to zero through the zero setting circuit, the signal output is suspended, and the pneumatic sensor is restarted after the ozone concentration is recovered to be normal; the voltage detection circuit is used for detecting the voltage of the processor, a standard voltage value is set in the processor IC1, when the error between the voltage detected by the voltage detection circuit and the standard voltage value is larger than 20%, the pneumatic sensor stops working, and the processor IC1 gives an alarm through the alarm circuit.

The resistance values of the temperature-sensitive resistor R13 and the temperature-sensitive resistor R14 change along with the temperature change, so that the condition that the parameter of the pneumatic sensor is drifted due to the environmental temperature and the control of the pneumatic sensor on the pneumatic load is influenced is avoided. The processor IC1 performs scheduled on-off and timed on-off on the pneumatic sensor through an internal clock function. The zero setting circuit aims at the power-on process of the pneumatic sensor, the pneumatic sensor needs a heating process when reaching the Curie point temperature, and in the heating process, when signals of an F-1 port and a P1-1 port show the consistency with signals when wind flows on the surface of the wind-sensitive resistor, the power output is increased; meanwhile, the duration of time for the pneumatic sensor to reach the Curie point temperature is measured according to the service environment of the pneumatic sensor, and the power-on time of the pneumatic sensor is set through the processor IC1, so that the input signal is not influenced by signals, and the control circuit is prevented from being started by mistake.

In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims

1. The utility model provides an intelligent control pnematic sensor, includes pnematic detection circuitry, its characterized in that: the intelligent control system is characterized by further comprising a processor IC1, an ozone detection circuit, an alarm circuit, a voltage detection circuit and a zero setting circuit, wherein the processor IC1 is an STC12C5404AD chip, the pneumatic detection circuit comprises a wind-sensitive resistor R15, a negative temperature coefficient compensation resistor R14 and a positive temperature coefficient compensation resistor R13, and the inverting input end of the operational amplifier U1 is grounded through the negative temperature coefficient compensation resistor R14 and is connected with the adjusting end of the adjustable potentiometer RW 1; the non-inverting input end of the operational amplifier U1 is grounded through a wind-sensitive resistor R15 and is connected with +12V through a positive temperature coefficient compensation resistor R13, the output end of the operational amplifier U1 is connected with the base electrode of a triode Q3 through a resistor R17, and the collector electrode of a triode Q3 is connected with the P2.4 port of a processor IC1 through a resistor R21; the ozone detection circuit comprises an ozone sensor CT, wherein the C end of the ozone sensor CT is connected with the inverting input end of an operational amplifier U2, the output end of an operational amplifier U2 is connected with the R end of the ozone sensor CT, the W end of the ozone generator is connected with the inverting input end of an operational amplifier U3 through a resistor R5, the non-inverting input end of the operational amplifier U3 is grounded through a resistor R6, the output end of an operational amplifier U3 is connected with the inverting input end of the operational amplifier U3 through a resistor R7, and the output end of an operational amplifier U3 is further connected with the P2.2 port of a processor IC 1.

2. The intelligent control pneumatic sensor of claim 1, wherein: the zero setting circuit comprises triodes Q1, Q2 and Q4, a P2.0 port of a processor IC1 is connected with a base electrode of a triode Q1 through a resistor R8, an emitter electrode of the triode Q1 is connected with +5V, a collector electrode of the triode Q1 is connected with a base electrode of a triode Q2 through a resistor R11, a collector electrode of the triode Q2 is connected with 12V voltage through a diode D4, two ends of the diode D4 are connected with a coil of a relay J1 in parallel, and two ends of a normally open contact of the relay J1 are connected with a pneumatic load through a P1_1 port and an F-1 port; the collector of the triode Q2 is connected with the base of the triode Q4 through a resistor R4, the collector of the triode Q4 is connected with the P2.5 port of the processor IC1 through a resistor R23, and the normally open contact of the relay J1 is also connected with the normally open contact of the relay J2 and the buzzer SP1 in series; the P1.5 port of the processor IC1 is connected with the base electrode of a triode Q5 through a resistor R28, the collector electrode of the triode Q5 is connected with the base electrode of a triode Q6 through a resistor R30, the collector electrode of a triode Q6 is connected with +12V through a diode D3, and two ends of the diode D3 are connected with the coil of the relay J2 in parallel.

3. The intelligent control pneumatic sensor of claim 1, wherein: the voltage detection circuit comprises a resistor R24, a resistor R26, a temperature-sensitive resistor R25 and a temperature-sensitive resistor R27, wherein one end of the resistor R24 is connected with +12V, the other end of the resistor R24 is connected with the temperature-sensitive resistor R25 in series and is connected with a P2.6 port of the processor IC1, and the other end of the temperature-sensitive resistor R25 is grounded; one end of the resistor R26 is connected with +12V, the other end of the resistor R26 is connected with the temperature-sensitive resistor R27 in series and is connected with the P2.7 port of the processor IC1, and the other end of the temperature-sensitive resistor R27 is grounded.

4. The intelligent control pneumatic sensor of claim 1, wherein: the power supply module further comprises a power supply module, wherein the power supply module comprises an AC/DC converter P2 and an AC/DC converter P1, the L end of a 220V alternating current power supply is connected with a pin 1 of the AC/DC converter P2 and an AC/DC converter P1 through a key switch S1 and a fuse FU1 respectively, the N end of the 220V alternating current power supply is connected with a pin 3 of the AC/DC converter P2 and the AC/DC converter P1, a pin 2 and a pin 4 of the AC/DC converter P2 are respectively a +12V voltage output end and a-12V voltage output end, a pin 2 of the AC/DC converter P1 is connected with a Vin port of the DC/DC converter P3, a pin 4 of the AC/DC converter P1 is connected with a GND port of the DC/DC converter, and a Vout port of the DC/DC converter P3 is a +5V voltage output end.