CN114518192B - Detection circuit for mobile base station - Google Patents
Detection circuit for mobile base station Download PDFInfo
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- CN114518192B CN114518192B CN202210177051.6A CN202210177051A CN114518192B CN 114518192 B CN114518192 B CN 114518192B CN 202210177051 A CN202210177051 A CN 202210177051A CN 114518192 B CN114518192 B CN 114518192B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
- G01L19/08—Means for indicating or recording, e.g. for remote indication
- G01L19/086—Means for indicating or recording, e.g. for remote indication for remote indication
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/32—Responding to malfunctions or emergencies
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/49—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring ensuring correct operation, e.g. by trial operation or configuration checks
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/88—Electrical aspects, e.g. circuits
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/02—Means for indicating or recording specially adapted for thermometers
- G01K1/024—Means for indicating or recording specially adapted for thermometers for remote indication
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
- G01K7/16—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements
- G01K7/22—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements the element being a non-linear resistance, e.g. thermistor
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Nonlinear Science (AREA)
- Measuring Fluid Pressure (AREA)
- Alarm Systems (AREA)
Abstract
The invention discloses a detection circuit for a mobile base station, which effectively solves the problem that the detection mode of an expansion valve in the mobile base station is influenced by the prior art. The first detection circuit detects pressure signals of a high pressure side and a low pressure side of a compressor in a mobile base station by using the pressure sensor U1A and the pressure sensor U1B, and compares the pressure signals respectively, so as to output a first high level to a second detection circuit, the second detection circuit detects a temperature signal in a compressor pipeline by using the thermistor R10, calculates the temperature signal, then outputs a difference signal, calculates the difference signal with the first high level output by the first detection circuit, and then judges the difference signal, so as to output a reminding signal and an emergency signal to a monitoring center, and further ensures that the mobile base station normally carries out information transmission.
Description
Technical Field
The invention relates to the field of mobile base station detection, in particular to a detection circuit for a mobile base station.
Background
The mobile base station, namely public mobile communication mobile base station, is an interface device for accessing mobile equipment to the Internet, and is also a form of a radio station, namely a radio transceiver station for transmitting information with a mobile phone terminal through a mobile communication switching center in a certain radio coverage area, wherein the normal operation of internal equipment can ensure that the mobile base station transmits information. Therefore, an air conditioner is arranged for the mobile base station to ensure that the environment in the mobile base station is kept constant, so that a relatively obvious effect is achieved on ensuring the normal operation of the mobile base station.
The air conditioner in the mobile base station is one of key equipment to be maintained, but it is known that the air conditioner is not in a small number of events which can not transmit information because of the abnormal occurrence of the expansion valve in the air conditioner, but the pressure in the compressor can be correspondingly controlled because the expansion valve is quite special, and the dirty blockage is easy to occur, namely, the air conditioner is correspondingly caused to be in failure when the expansion valve is in a problem, so that the information transmission work of the mobile base station is affected.
The present invention thus provides a new solution to this problem.
Disclosure of Invention
Aiming at the defects existing in the prior art, the invention aims to provide a detection circuit for a mobile base station, which effectively solves the problem that the detection mode of an expansion valve in the mobile base station or the detection mode of the expansion valve in the mobile base station has influence on the mobile base station in the prior art.
The technical scheme that the detection circuit for the mobile base station comprises a first detection circuit and a second detection circuit, wherein the first detection circuit detects pressure signals of a high pressure side and a low pressure side of a compressor in the mobile base station by using a pressure sensor U1A and a pressure sensor U1B, compares the pressure signals respectively, and outputs a first high level to the second detection circuit, and the second detection circuit detects a temperature signal in a compressor pipeline by using a thermistor R10, calculates the temperature signal, then outputs a difference signal, and judges the difference signal by using the difference signal and the first high level output by the first detection circuit, so as to output a reminding signal and an emergency signal to a monitoring center.
Further, the first detection circuit detects pressure signals of a high pressure side and a low pressure side of a compressor in the mobile base station by using the pressure sensor U1A and the pressure sensor U1B, compares the two pressure signals respectively to generate a first high level, and outputs the first high level to the second detection circuit.
Further, the first detection circuit includes a resistor R1, one end of the resistor R1 is connected with an out pin of the pressure sensor U1A, the other end of the resistor R1 is connected with an in-phase end of the operational amplifier U3A, an inverting end of the operational amplifier U3A is connected with one end of the resistor R3 and one end of the resistor R5, the other end of the resistor R3 is connected with a VCC pin of the pressure sensor U1A and a VCC pin of the pressure sensor U1B, the other end of the resistor R5 is connected with an inverting end of the operational amplifier U2A and one end of the variable resistor R6, the in-phase end of the operational amplifier U2A is connected with one end of the resistor R2, the other end of the resistor R2 is connected with an out pin of the pressure sensor U1B, an output end of the operational amplifier U2A is connected with an anode of the diode D3, a cathode of the diode D3 is connected with an anode of the diode D12, a cathode of the diode D12 is connected with one end of the resistor R4, a cathode of the diode D13 is connected with an anode of the diode D13, and the other end of the diode D2 is connected with an output pin of the variable resistor U1B is connected with the ground.
Further, the second detection circuit comprises a monitor and a controller, the monitor detects a temperature signal in the compressor pipeline by using the thermistor R10, calculates the temperature signal, outputs a difference signal, generates a calculation signal after OR calculation with a first high level output by the first detection circuit, conducts the controller by using the calculation signal, judges the difference signal, and generates a reminding signal and an emergency signal according to a judging result, so that the reminding signal and the emergency signal are output to the monitoring center.
Further, the monitor includes a voltage stabilizing tube D6, the positive pole of the voltage stabilizing tube D6 is connected with one end of the thermistor R10, one end of the resistor R3 in the first detection circuit, the inverting end of the operational amplifier U3A, one end of the resistor R9, the inverting end of the operational amplifier U4B, one end of the resistor R20, one end of the capacitor C3, the same phase end of the operational amplifier U4B, one end of the resistor R15, the output end of the operational amplifier U4B is connected with the positive pole of the diode D1, the other end of the resistor R20, the anode of the thyristor Q6, the negative pole of the diode D1 is connected with the positive pole of the voltage stabilizing tube D7, the control pole of the thyristor Q6, one end of the capacitor C4, one end of the resistor R8, the negative pole of the diode D4, the positive pole of the diode D4 is connected with the positive pole of the diode D13 in the first detection circuit, the positive pole of the diode D12, the other end of the resistor R4, the other end of the resistor R8, the other end of the resistor R4 is connected with the resistor R3, and the other end of the resistor R4 is connected with the other end of the resistor R3.
Further, the controller comprises a diode D8, the positive electrode of the diode D8 is respectively connected with one end of a resistor R11, the base electrode of a triode Q1, the cathode of a thyristor Q3, the 5 pin of an AND gate U4A, the input end of U6A, the cathode of the thyristor Q6 in the monitor, the negative electrode of the diode D8 is respectively connected with a blowing pipe and one end of a resistor R7, the other end of the resistor R7 is respectively connected with one end of a capacitor C1 and the control electrode of the thyristor Q3, the collector electrode of the triode Q1 is respectively connected with one end of a resistor R14 and one end of a resistor R12, the other end of the resistor R12 is connected with one end of a switch S1, the other end of the resistor R13 is connected with one end of a switch S2, the other end of the switch S2 is connected with the same phase end of an operational amplifier U5B, the inverting end of the operational amplifier U5B is connected with one end of a resistor R17, the output end of the operational amplifier U5B is respectively connected with one end of a resistor R18, the other end of the resistor R17, one end of a bidirectional voltage stabilizing tube D5, and the monitoring center, the other end of the resistor R18 is respectively connected with one end of the resistor R19 and the emitter of the triode Q2, the base of the triode Q2 is respectively connected with one end of the resistor R16 and one end of the capacitor C5, the other end of the capacitor C5 is respectively connected with one end of the resistor R16, the cathode of the diode D9 and the other end of the switch S1, one end of the relay K1, the collector of the triode Q2 is respectively connected with the emitter of the triode Q1, the other end of the resistor R11 and the other end of the resistor R3 in the first detection circuit and is connected with the positive polarity power supply VCC, the pin 7 of the AND gate U4A is respectively connected with the cathode of the diode D4 in the monitor, one end of the resistor R4 in the first detection circuit, the cathode of the diode D13 and the cathode of the diode D12, the output end of the AND gate U4A and the input end of the NOT gate U6A are connected with one end of the relay K2, the other end of the resistor R14 is respectively connected with the other end of the capacitor C1, the other end of the relay K2, the other end of the resistor R19, the other end of the bidirectional voltage stabilizing tube D5, the other end of the resistor R8 in the monitor and the other end of the resistor R4 in the first detection circuit and is connected with the ground.
The invention has the following beneficial effects:
the pressure in the compressor of the air conditioner in the mobile base station is detected through the first detection circuit, the temperature signal of the compressor pipeline is detected through the second detection circuit, the difference signal generated by the first high level and the difference signal generated by the second detection circuit are subjected to OR operation, the judgment of the difference signal is started, the state of the expansion valve in the air conditioner is judged, the dirty blocking degree of the expansion valve is detected through the corresponding starting blowpipe, the normal operation of the air conditioner in the mobile base station is ensured, the working environment of the mobile base station is ensured to be kept constant, the mobile base station can perform confidence transfer work, and the problem that the detection mode of the expansion valve in the mobile base station is influenced by the prior art is effectively avoided.
Drawings
Fig. 1 is a schematic diagram of a first detection circuit of the present invention.
Fig. 2 is a schematic diagram of a second detection circuit of the present invention.
Detailed Description
The foregoing and other features, aspects and advantages of the present invention will become more apparent from the following detailed description of the embodiments, which proceeds with reference to the accompanying figures 1-2. The following embodiments are described in detail with reference to the drawings.
Exemplary embodiments of the present invention will be described below with reference to the accompanying drawings.
The detection circuit comprises a first detection circuit and a second detection circuit, wherein the first detection circuit is used for detecting pressure signals of a high pressure side and a low pressure side of the compressor in the mobile base station by using a pressure sensor U1A and a pressure sensor U1B, and comparing the pressure signals respectively, so as to output a first high level to the second detection circuit, the second detection circuit is used for detecting a temperature signal in a compressor pipeline by using a thermistor R10, calculating the temperature signal, outputting a difference signal, calculating and judging the difference signal and the first high level output by the first detection circuit, generating a reminding signal and an alarm signal, and transmitting the reminding signal and the alarm signal to a monitoring center.
The first detection circuit comprises a resistor R1, one end of the resistor R1 is connected with an out pin of the pressure sensor U1A, the other end of the resistor R1 is connected with an in-phase end of the operational amplifier U3A, the opposite end of the operational amplifier U3A is connected with one end of the resistor R3 and one end of the resistor R5, the other end of the resistor R3 is connected with a VCC pin of the pressure sensor U1A and a VCC pin of the pressure sensor U1B, the other end of the resistor R5 is connected with an opposite end of the operational amplifier U2A and one end of the variable resistor R6, the in-phase end of the operational amplifier U2A is connected with one end of the resistor R2, the other end of the resistor R2 is connected with an out pin of the pressure sensor U1B, the output end of the operational amplifier U2A is connected with the positive electrode of the diode D3, the negative electrode of the diode D3 is connected with the positive electrode of the diode D12, the negative electrode of the diode D12 is connected with one end of the resistor R4, the negative electrode of the diode D13 is connected with the negative electrode of the diode D13, the positive electrode of the diode D2 is connected with the positive end of the diode D2A is connected with the output pin of the pressure sensor U1B, and the other end of the variable resistor U1 is connected with the other end of the variable resistor U1B is connected with the ground;
the first detection circuit detects pressure signals of a high pressure side and a low pressure side of a compressor in the mobile base station by using a pressure sensor U1A and a pressure sensor U1B, wherein the pressure sensor U1A and the pressure sensor U1B can both adopt pressure sensors with similar models as CPS171, the pressure signal detected by the pressure sensor U1A is used as a first pressure signal, the pressure signal detected by the pressure sensor U1B is used as a second pressure signal, a resistor R1 transmits the first pressure signal to an operational amplifier U3A to be compared with a pressure upper limit signal provided by partial pressure of a resistor R3, a resistor R5 and a variable resistor R6, when the operational amplifier U3A conducts a diode D2, the pressure of the high-pressure side in the compressor is indicated to be higher than the upper limit value, the resistor R2 transmits a second pressure signal to the operational amplifier U2A to be compared with a pressure lower limit signal provided by the voltage division of the resistor R3, the resistor R5 and the variable resistor R6, when the operational amplifier U2A conducts the diode D3, the pressure of the low-pressure side in the compressor is indicated to be lower than the lower limit value, when one or both of the diode D2 and the diode D3 are conducted, a first OR gate circuit formed by the diode D13, the diode D12 and the resistor R4 is conducted, the expansion valve is indicated to be abnormal, and the first OR gate circuit outputs a first high level to a second detection circuit.
The monitor comprises a voltage stabilizing tube D6, wherein the positive electrode of the voltage stabilizing tube D6 is respectively connected with one end of a thermistor R10, one end of a resistor R3 in a first detection circuit and the opposite end of an operational amplifier U3A, the negative electrode of the voltage stabilizing tube D6 is respectively connected with one end of a resistor R9, the opposite end of an operational amplifier U4B and one end of a resistor R20, the other end of the resistor R9 is respectively connected with one end of a capacitor C3, the same-phase end of the operational amplifier U4B and one end of a resistor R15, the output end of the operational amplifier U4B is respectively connected with the positive electrode of a diode D1, the other end of a resistor R20 and the anode of a thyristor Q6, the negative electrode of the diode D1 is respectively connected with the positive electrode of a voltage stabilizing tube D7, one end of a capacitor C4 and one end of a diode D8, the negative electrode of a diode D4, the positive electrode of a diode D12 and one end of a resistor R4 are respectively connected with the positive electrode of a diode D13 in the first detection circuit, the other end of a resistor R4 and the other end of a resistor R4 are respectively connected with the other end of the resistor R4 and the resistor R10 in the first detection circuit;
the controller comprises a diode D8, the positive electrode of the diode D8 is respectively connected with one end of a resistor R11, the base electrode of a triode Q1, the cathode of a thyristor Q3, the 5 pin of an AND gate U4A, the input end of a U6A and the cathode of the thyristor Q6 in the monitor, the negative electrode of the diode D8 is respectively connected with a blowpipe and one end of a resistor R7, the other end of the resistor R7 is respectively connected with one end of a capacitor C1 and the control electrode of the thyristor Q3, the collector electrode of the triode Q1 is respectively connected with one end of a resistor R14 and one end of a resistor R12, the other end of the resistor R12 is connected with one end of a switch S1, the other end of the resistor R13 is connected with one end of a switch S2, the other end of the switch S2 is connected with the same phase end of an operational amplifier U5B, the reverse end of the operational amplifier U5B is respectively connected with one end of a resistor R18, the other end of the resistor R17, one end of a bidirectional voltage stabilizing tube D5 and a monitoring center, the other end of the resistor R18 is respectively connected with one end of the resistor R19 and the emitter of the triode Q2, the base of the triode Q2 is respectively connected with one end of the resistor R16 and one end of the capacitor C5, the other end of the capacitor C5 is respectively connected with one end of the resistor R16, the cathode of the diode D9 and the other end of the switch S1, one end of the relay K1, the collector of the triode Q2 is respectively connected with the emitter of the triode Q1, the other end of the resistor R11 and the other end of the resistor R3 in the first detection circuit and is connected with the positive polarity power supply VCC, the pin 7 of the AND gate U4A is respectively connected with the cathode of the diode D4 in the monitor, one end of the resistor R4 in the first detection circuit, the cathode of the diode D13 and the cathode of the diode D12, the output end of the AND gate U4A and the input end of the NOT gate U6A are connected with one end of the relay K2, the other end of the resistor R14 is respectively connected with the other end of the capacitor C1, the other end of the relay K2, the other end of the resistor R19, the other end of the bidirectional voltage stabilizing tube D5, the other end of the resistor R8 in the monitor and the other end of the resistor R4 in the first detection circuit and is connected with the ground.
The second detection circuit comprises a monitor and a controller, the monitor detects the temperature signal of the compressor pipeline of the air conditioner in the mobile base station by utilizing a thermistor R10, the temperature signal output by the thermistor R10 and a resistor R3 is transmitted to an operational amplifier U4B in two ways through a voltage stabilizing tube D6, one way is directly transmitted to the opposite phase end of the operational amplifier U4B, the other way is transmitted to the same phase end of the operational amplifier U4B through a resistor R9 and a capacitor C3, the operational amplifier U4B carries out subtraction operation on the two ways of temperature signals, thus outputting a difference signal, when the difference signal can not conduct a diode D1, the temperature of the pipeline in the compressor is not reduced at the moment, and when the difference signal conducts the diode D1, the temperature of the pipeline in the compressor is reduced at the moment, namely, the expansion valve is blocked at the moment, the diode D4 receives the first high level output by the first detection circuit, the second conduction circuit composed of the diode D7, the diode D4 and the resistor R8 performs an or operation on the first high level or the difference signal, the second conduction circuit outputs an operation signal, the operation signal turns on the thyristor Q6 through the capacitor C4, i.e. the controller is turned on, the thyristor Q6 determines the difference signal, when the difference signal turns on the triode Q1, (i.e. the difference signal is at a low level, and the first high level exists), the expansion valve is damaged, the triode Q1 outputs the second high level and the reminding signal through the switch S1, the resistor R12 and the resistor R13, the and gate U4A and the non-gate U6A simultaneously act to turn on the relay K2, the switch S1 is turned off, the second high level cannot be output to the monitoring center, and the reminding signal can be output to the monitoring center, reminding a monitoring center of immediately maintaining an expansion valve to ensure normal information transmission of a mobile base station, wherein a switch S1 is a pin switch of a relay K2, and a switch S2 is a pin switch of the relay K1; when the differential signal conducts the voltage stabilizing tube D8, the diode D8 enables the blowing tube to work, the blowing tube is conducted at the moment, the blowing tube blows the dirty blockage on the blowing tube, so that the blowing tube can work normally, the blowing tube is formed by combining high-pressure nitrogen with other methods in the prior art, the dirty blockage on the blowing tube can be blown off, the differential signal delays by utilizing the resistor R7 and the capacitor C1 to conduct the thyristor Q3, the thyristor Q3 transmits the differential signal to the triode Q1, the diode D9, the AND gate U4A and the non-gate U6A to judge, if the differential signal conducts the triode Q1 at the moment, namely the differential signal is low level after being acted by the blowing tube, the thyristor Q3 is normally acted at the moment and the temperature signal of the pipeline is restored to be normal at the moment, namely the AND gate U4A conducts the differential signal with the first level and then conducts the thyristor Q3 through the action of the AND gate U6A, namely the relay U2 is conducted to the high level and then conducts the output signal to the trigger valve U6A, and the trigger signal is reversely conducted by utilizing the trigger valve U1, and then the trigger signal is conducted by the trigger valve S2 is conducted to the trigger valve to output the trigger valve to be in the state of the normal state, and the trigger signal is in the state of the trigger that the trigger valve is in the trigger state is turned off, and the trigger valve is in the state of the state that the trigger is turned off; when the difference signal is that the diode D9 is conducted, namely that the expansion valve is seriously blocked at the moment, the blowpipe cannot function, the NOT gate U6A outputs a high level, the relay K2 is conducted, the relay K2 enables the switch S1 to be disconnected, the switch S2 is in a closed state, the relay K2 is not conducted, the switch S1 maintains a closed state, the diode D9 outputs an emergency signal at the moment, the emergency signal is rapidly transmitted to the monitoring center through the resistor R16, the capacitor C5 and the triode Q2, and the monitoring center is reminded that the expansion valve and other parts of the compressor are required to be immediately subjected to the dirt blocking removal treatment so as to ensure the normal information transmission of the mobile base station; and the surge phenomenon of the monitoring center caused by the reminding signal and the emergency signal is restrained by utilizing the bidirectional voltage stabilizing tube D5.
When the invention is used, the first detection circuit detects pressure signals of a high pressure side and a low pressure side of a compressor in a mobile base station by using the pressure sensor U1A and the pressure sensor U1B, the pressure signal detected by the pressure sensor U1A is used as a first pressure signal, the pressure signal detected by the pressure sensor U1B is used as a second pressure signal, the resistor R1 transmits the first pressure signal to the operational amplifier U3A to be compared with an upper pressure limit signal provided by the voltage division of the resistor R3, the resistor R5 and the variable resistor R6, when the operational amplifier U3A conducts the diode D2, the pressure of the high pressure side in the compressor is higher than the upper limit value, the resistor R2 transmits the second pressure signal to the operational amplifier U2A to be compared with a lower pressure limit signal provided by the voltage division of the resistor R3, the variable resistor R5 and the variable resistor R6, when the operational amplifier U2A conducts the diode D3, the pressure of the low pressure side in the compressor is lower than the lower limit value, when one or both of the diode D2 and the diode D3 are conducted, a first OR gate circuit consisting of the diode D13, the diode D12 and the resistor R4 is conducted, the expansion valve is abnormal, the first OR gate circuit outputs a first high level to a second detection circuit, the second detection circuit comprises a monitor and a controller, the monitor detects a temperature signal of a compressor pipeline of an air conditioner in a mobile base station by utilizing the thermistor R10, the temperature signal output by the thermistor R10 and the resistor R3 is transmitted to the operational amplifier U4B in two ways through the temperature signal output by the voltage stabilizing tube D6, the operational amplifier U4B performs subtraction operation on the two temperature signals to output a difference signal, when the difference signal conducts the diode D1, the diode D4 receives the first high level output by the first detection circuit, the second conducting circuit composed of the diode D7, the diode D4 and the resistor R8 carries out OR operation on the first high level or difference signal, the second conducting circuit outputs an operation signal, the operation signal conducts the thyristor Q6 through the capacitor C4, namely the controller is conducted, the thyristor Q6 judges the difference signal, when the difference signal conducts the triode Q1, the triode Q1 respectively outputs the second high level and a reminding signal through the switch S1, the resistor R12 and the resistor R13, meanwhile, the AND gate U4A and the NOT gate U6A simultaneously act to conduct the relay K2 to disconnect the switch S1, the second high level cannot be output to the monitoring center and the reminding signal can be output to the monitoring center, and when the difference signal conducts the voltage stabilizing tube D8, the diode D8 enables the blowing tube to work, the difference signal is delayed by a resistor R7 and a capacitor C1 to conduct a thyristor Q3, the thyristor Q3 transmits the difference signal to a triode Q1, a diode D9, an AND gate U4A and an NOT gate U6A to judge, if the difference signal is conducted, the triode Q1 is conducted, meanwhile, the thyristor Q3 conducts a relay K2 under the action of the AND gate U4A and the NOT gate U6A, namely when the difference signal after the blowing pipe is in a low level, the NOT gate U6A outputs a high level, the relay K2 conducts, the relay K2 turns off a switch S1, and the switch S2 is in a closed state, and the triode Q1 outputs a reminding signal through the resistor R13 to a monitoring center, so that the monitoring center is reminded of immediately maintaining an expansion valve to ensure normal information transmission of a mobile base station; when the difference signal is that the diode D9 is conducted, namely that the expansion valve is seriously blocked at the moment, the blowpipe cannot function, the NOT gate U6A outputs a high level, the relay K2 is conducted, the relay K2 enables the switch S1 to be disconnected, the switch S2 is in a closed state, the relay K2 is not conducted, the switch S1 maintains a closed state, the diode D9 outputs an emergency signal at the moment, the emergency signal is rapidly transmitted to the monitoring center through the resistor R16, the capacitor C5 and the triode Q2, and the monitoring center is reminded that the expansion valve and other parts of the compressor are required to be immediately subjected to the dirt blocking removal treatment so as to ensure the normal information transmission of the mobile base station; and the surge phenomenon of the monitoring center caused by the reminding signal and the emergency signal is restrained by utilizing the bidirectional voltage stabilizing tube D5.
The invention realizes the following effects:
(1) The method comprises the steps of detecting the pressure in a compressor of an air conditioner in a mobile base station through a first detection circuit, detecting a temperature signal of a compressor pipeline through a second detection circuit, performing OR operation on a difference signal generated by a first high level generated by the first detection circuit and a difference signal generated by the second detection circuit, starting judgment on the difference signal, judging the state of an expansion valve in the air conditioner, correspondingly starting a blowpipe to detect the filth blockage degree of the expansion valve, and processing, thereby ensuring the normal operation of the air conditioner in the mobile base station, ensuring the constant working environment of the mobile base station, further enabling the mobile base station to perform confidence transfer work, and effectively avoiding the problem that the detection mode of the expansion valve in the mobile base station is influenced by the prior art;
(2) The monitor and the controller are arranged in the second detection circuit, the controller is started through the monitor, the difference signal generated in the monitor is judged through the controller, the first high level output by the first detection circuit is added, so that the state of the expansion valve is accurately judged, the controller is used for generating a reminding signal and an emergency signal, the reminding signal is used for indicating the fault of the expansion valve, and the emergency signal is used for indicating the dirty blockage of the expansion valve, so that the two signals can be distinguished by the monitoring center, and the work of staff in the monitoring center is facilitated.
Claims (2)
1. The detection circuit for the mobile base station is characterized by comprising a first detection circuit and a second detection circuit, wherein the first detection circuit detects pressure signals of a high pressure side and a low pressure side of a compressor in the mobile base station by using a pressure sensor U1A and a pressure sensor U1B, respectively compares the pressure signals to output a first high level to the second detection circuit, and the second detection circuit detects a temperature signal in a compressor pipeline by using a thermistor R10, calculates the temperature signal to output a difference signal, calculates the difference signal by using the difference signal and the first high level output by the first detection circuit, and judges the difference signal to output a reminding signal and an emergency signal to a monitoring center;
the first detection circuit comprises a resistor R1, one end of the resistor R1 is connected with an out pin of the pressure sensor U1A, the other end of the resistor R1 is connected with an in-phase end of the operational amplifier U3A, the opposite end of the operational amplifier U3A is connected with one end of the resistor R3 and one end of the resistor R5, the other end of the resistor R3 is connected with a VCC pin of the pressure sensor U1A and a VCC pin of the pressure sensor U1B, the other end of the resistor R5 is connected with an opposite end of the operational amplifier U2A and one end of the variable resistor R6, the in-phase end of the operational amplifier U2A is connected with one end of the resistor R2, the other end of the resistor R2 is connected with an out pin of the pressure sensor U1B, the output end of the operational amplifier U2A is connected with the positive electrode of the diode D3, the negative electrode of the diode D3 is connected with the positive electrode of the diode D12, the negative electrode of the diode D12 is connected with one end of the resistor R4, the negative electrode of the diode D13 is connected with the negative electrode of the diode D13, the positive electrode of the diode D2 is connected with the positive end of the diode D2A is connected with the output pin of the pressure sensor U1B, and the other end of the variable resistor U1 is connected with the other end of the variable resistor U1B is connected with the ground;
the second detection circuit comprises a monitor and a controller, the monitor comprises a voltage stabilizing tube D6, the positive electrode of the voltage stabilizing tube D6 is respectively connected with one end of a thermistor R10, one end of a resistor R3 in the first detection circuit and the opposite end of an operational amplifier U3A, the negative electrode of the voltage stabilizing tube D6 is respectively connected with one end of a resistor R9, the opposite end of an operational amplifier U4B and one end of a resistor R20, the other end of the resistor R9 is respectively connected with one end of a capacitor C3, the same-phase end of the operational amplifier U4B and one end of a resistor R15, the output end of the operational amplifier U4B is respectively connected with the positive electrode of a diode D1, the other end of a resistor R20 and the anode of a thyristor Q6, the negative electrode of the diode D1 is respectively connected with the positive electrode of the voltage stabilizing tube D7, the negative electrode of the thyristor Q6 is respectively connected with one end of a thyristor Q6, one end of a capacitor C4, one end of a resistor R8 and the negative electrode of a diode D4, the positive electrode of the diode D4 is respectively connected with the positive electrode of a diode D13 in the first detection circuit, one end of the other end of the diode D4 is respectively connected with the positive electrode of the diode D12, the other end of the diode D4 is connected with the other end of the resistor C4, and the other end of the resistor R4 is connected with the other end of the resistor R4 is respectively, and the other end of the resistor R4 is connected with the other end of the resistor R3 and the other end of the resistor is respectively.
2. The detecting circuit for a mobile base station as claimed in claim 1, wherein the controller includes a diode D8, the anode of the diode D8 is connected with one end of a resistor R11, the base of a triode Q1, the cathode of a thyristor Q3, the 5 pin of an AND gate U4A, the input end of U6A, the cathode of a thyristor Q6 in the monitor, the cathode of the diode D8 is connected with a blowpipe and one end of a resistor R7, the other end of the resistor R7 is connected with one end of a capacitor C1 and the control electrode of the thyristor Q3, the collector of the triode Q1 is connected with one end of a resistor R14, one end of a resistor R13, one end of a resistor R12, the other end of the resistor R12 is connected with one end of a switch S1, the other end of the resistor R13 is connected with one end of a switch S2, the other end of the switch S2 is connected with the same phase end of an operational amplifier U5B, the inverting end of the operational amplifier U5B is connected with one end of a resistor R17, the output end of the operational amplifier U5B is respectively connected with one end of a resistor R18, the other end of a resistor R17, one end of a bidirectional voltage stabilizing tube D5 and a monitoring center, the other end of the resistor R18 is respectively connected with one end of a resistor R19 and the emitter of a triode Q2, the base electrode of the triode Q2 is respectively connected with one end of a resistor R16 and one end of a capacitor C5, the other end of the capacitor C5 is respectively connected with one end of a resistor R16, the cathode of a diode D9 and the other end of a switch S1, one end of a relay K1, the collector of the triode Q2 is respectively connected with the emitter of the triode Q1, the other end of the resistor R11 and the other end of the resistor R3 in a first detection circuit and is connected with a positive polarity power supply VCC, the pin 7 of an AND gate U4A is respectively connected with the cathode of a diode D4 in the monitor, one end of the resistor R4 in the first detection circuit, the cathode of a diode D13, the cathode of a diode D12 and the output end of the AND gate U4A and the input end of the NOT gate U6A, the output end of the NOT gate U6A is connected with one end of a relay K2, and the other end of a resistor R14 is respectively connected with the other end of a capacitor C1, the other end of the relay K2, the other end of a resistor R19, the other end of a bidirectional voltage stabilizing tube D5, the other end of a resistor R8 in a monitor and the other end of a resistor R4 in a first detection circuit and is connected with the ground.
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| DE4015724A1 (en) * | 1990-05-16 | 1991-11-21 | Lectra Trading Ag | Thyristor-controlled relay for overcurrent or overheat protection - is tripped by triac with two=stage thyristor firing circuit and reset by simple key switch |
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| CN113551709A (en) * | 2021-07-28 | 2021-10-26 | 西南交通建设集团股份有限公司 | Road surface compaction construction detecting system |
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| JPH0560404A (en) * | 1990-01-31 | 1993-03-09 | Eaton Corp | Thermal expansion valve with electronic controller |
| DE4015724A1 (en) * | 1990-05-16 | 1991-11-21 | Lectra Trading Ag | Thyristor-controlled relay for overcurrent or overheat protection - is tripped by triac with two=stage thyristor firing circuit and reset by simple key switch |
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| CN114518192A (en) | 2022-05-20 |
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