CN111404531A - Photoelectric sensor switch monitoring protection circuit and monitoring method - Google Patents
Photoelectric sensor switch monitoring protection circuit and monitoring method Download PDFInfo
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- CN111404531A CN111404531A CN202010192430.3A CN202010192430A CN111404531A CN 111404531 A CN111404531 A CN 111404531A CN 202010192430 A CN202010192430 A CN 202010192430A CN 111404531 A CN111404531 A CN 111404531A
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/94—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated
- H03K17/941—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated using an optical detector
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H17/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves, not provided for in the preceding groups
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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
- G01K7/24—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 in a specially-adapted circuit, e.g. bridge circuit
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Abstract
The invention discloses a photoelectric sensor switch monitoring protection circuit and a monitoring method, wherein the monitoring protection circuit comprises the following steps: the device comprises a power supply unit, a signal transmitting unit, a signal receiving unit and a monitoring protection unit; characterized in that, the monitoring protection unit further comprises: the device comprises a noise detection module and a temperature detection module; the power supply unit converts alternating current into direct current and stabilizes output voltage by inputting voltage into equipment and through the rectification voltage stabilization module; the signal emission unit controls the carrier waveform of the acquired signal through a modulation module by using baseband pulses, so that the signal emission unit conforms to the emission standard of a signal emission tube; the signal receiving unit converts the received optical pulse into an electric pulse signal by using a demodulation module and transmits the electric pulse signal to a load; the monitoring protection unit utilizes a noise detection module and a temperature detection module to detect the external environment; the invention realizes the automatic diagnosis function of the photoelectric switch, reduces the error of the collected signal and ensures the accuracy and the stability.
Description
Technical Field
The invention relates to the field of photoelectric sensor switches, in particular to a photoelectric sensor switch monitoring protection circuit and a monitoring method.
Background
With the rapid development of scientific technology in China, both agricultural production and cultivation and industrial manufacturing are advancing to the direction of automatic production systems and unmanned production, so that the production efficiency can be improved and safe production can be realized; therefore, the sensor and the light control technology are researched and developed, and the realization of safe and unmanned production management has great practical significance.
The photoelectric switch has good return difference characteristic, so that the output state of the driver cannot be influenced even if the detected object shakes in a small range, and the photoelectric switch can be kept in a stable working area; the photosensitive induction device is driven by light radiation, and when certain strong light irradiates a photosensitive induction element, a switch is triggered and a signal is output; when a photoelectric sensor switch in the prior art works, due to different working occasions, the situation of mistaken touch can occur, so that the production process is disordered, and the production efficiency and the economy are influenced; and when the mechanical component that photoelectric sensor switch drove exists the abnormal damage, can influence the repeatability of sensor to make the sensor appear the error.
Disclosure of Invention
The purpose of the invention is as follows: a monitoring protection circuit and a monitoring method for a photoelectric sensor switch are provided to solve the above problems.
The technical scheme is as follows: a photosensor switch monitoring protection circuit comprising: the device comprises a power supply unit, a signal transmitting unit, a signal receiving unit and a monitoring protection unit; wherein, the monitoring protection unit further comprises: the device comprises a noise detection module and a temperature detection module;
the power supply unit inputs voltage into equipment, and converts alternating current into direct current and stable output voltage through the rectification and voltage stabilization module;
the signal emission unit controls the carrier waveform of the acquired signal through a modulation module by using baseband pulses, so that the signal emission unit conforms to the emission standard of a signal emission tube;
the signal receiving unit converts the received optical pulse into an electrical pulse signal by using the demodulation module, and simultaneously amplifies the received signal by using the amplification module and transmits the amplified signal to a load;
the monitoring protection unit utilizes the noise detection module and the temperature detection module to detect the external environment, so that the normal work of the sensor is not influenced by the external environment.
In one embodiment, the rectifying and voltage stabilizing module comprises: transformer TR1, fuse FU1, bridge type voltage stabilizing diode BR1, capacitor C1, diode D1, voltage stabilizer U1, slide rheostat RV1, triode Q1, capacitor C2, polarity capacitor C3, resistor R1 and resistor R2; an anode input end of the transformer TR1 is connected to one end of the fuse FU1, a cathode input end of the transformer TR1 is connected to a power supply, the other end of the fuse FU1 is connected to the power supply, an anode output end of the transformer TR1 is connected to an anode input end of the bridge zener diode BR1, a cathode output end of the transformer TR1 is connected to a cathode input end of the bridge zener diode BR1, an anode output end of the bridge zener diode BR1 is simultaneously connected to one end of the capacitor C1, an emitter of the triode Q1, an adjustable end of the sliding varistor RV1 and one end of the resistor R2, an anode output end of the bridge zener diode BR1 is respectively connected to the other end of the capacitor C1, a pin 1 of the varistor U1 and an anode of the diode D1, a pin 2 of the varistor U1 is simultaneously connected to one end of the sliding varistor 1, a terminal of the transformer FU 3536, and a cathode output end of the transformer TR, The collector of the triode Q1, one end of the resistor R1 and the other end of the resistor R2 are connected, the base of the triode Q1 is connected with the other end of the slide rheostat RV1, the pin No. 3 of the voltage stabilizer U1 is simultaneously connected with one end of the capacitor C2, the cathode of the diode D1, the anode of the polar capacitor C3 and the other end of the resistor R1, and the cathode of the polar capacitor C3 and the other end of the capacitor C2 are connected and grounded.
In one embodiment, the modulation module comprises: a resistor R3, a resistor R4, a resistor R5, an operational amplifier U2, a capacitor C5, a resistor R6, a capacitor C4, a diode D2, a capacitor C6, a resistor R7 and a diode D3; wherein, the No. 1 pin and the No. 2 pin of the operational amplifier U2 are connected with one end of the resistor R3, the other end of the resistor R3 is connected with the working voltage, the pin No. 3 of the operational amplifier U2 is simultaneously connected with one end of the resistor R4, one end of the resistor R5, one end of the resistor R6, one end of the resistor R7 and the anode of the diode D2, pin 6 of the operational amplifier U2 is connected with one end of the capacitor C4 and inputs 15V voltage, pin 4 of the operational amplifier U2 is connected to one end of the capacitor C5 and outputs a 15 voltage, the No. 5 pin of the operational amplifier U2 is simultaneously connected with one end of the capacitor C6, the cathode of the diode D2 and the anode of the diode D3, the other end of the capacitor C6 is connected to the other end of the resistor R6, and the cathode of the diode D3 is connected to and outputs the other end of the resistor R7.
In one embodiment, the amplification module comprises: the circuit comprises a triode Q2, a resistor R14, a resistor R15, a resistor R13, a resistor R16, a capacitor C11, a capacitor C12 and a capacitor C13; the base of the triode Q2 is connected to one end of the resistor R14, one end of the capacitor C11 and one end of the resistor R13, the collector of the triode Q2 is connected to one end of the capacitor C12 and one end of the resistor R16, the emitter of the triode Q2 is connected to one end of the resistor R15 and one end of the capacitor C13, the other end of the resistor R13 is connected to the other end of the resistor R15 and the other end of the capacitor C13, and the other end of the resistor R14 is connected to the other end of the resistor R16.
In one embodiment, the demodulation module comprises: the integrated intermediate frequency amplifier U3, a resistor R8, a resistor R9, a capacitor C7, a diode D4, a capacitor C9, a resistor R10, a resistor R11, a resistor R12, a capacitor C10 and a capacitor C8; pin 2 of the integrated intermediate frequency amplifier U3 is connected to one end of the resistor R11, pin 1 of the integrated intermediate frequency amplifier U3 is connected to one end of the resistor R11 and one end of the resistor R12, pin 3 of the integrated intermediate frequency amplifier U3 is connected to pin 4 and pin 5, pin 7 of the integrated intermediate frequency amplifier U3 is connected to one end of the resistor R10 and one end of the capacitor C9, pin 6 of the integrated intermediate frequency amplifier U3 is connected to one end of the resistor R6, the other end of the resistor R9 is connected to one end of the resistor R8 and one end of the capacitor C7, pin 8 and pin 9 of the integrated intermediate frequency amplifier U3 are connected to one end of the capacitor C8, the other end of the capacitor C8 is connected to one end of the capacitor C10, and pin 10 of the integrated intermediate frequency amplifier U3 is connected to the other end of the resistor R8 The other end of the capacitor C7, the anode of the diode D4, the other end of the capacitor C9, the other end of the resistor R10, the other end of the resistor R12 and the other end of the capacitor C10 are connected.
In one embodiment, the temperature detection module includes: a triode Q3, a light emitting diode D4, a resistor R17, a diode D5, a sliding rheostat RV2, a triode Q4, a resistor R18, a thermistor RT1, a resistor R19 and a capacitor C14, wherein the base of the triode Q3 is connected with one end of the resistor R17, the collector of the triode Q3 is connected with the anode of the light emitting diode D4, the other end of the resistor R17 is connected with one end of the resistor R18 and the collector of the triode Q4, the base of the triode Q4 is connected with the anode of the thermistor RT1 and one end of the resistor R19, the emitter of the triode Q4 is connected with the adjustable end of the sliding rheostat RV2, the cathode of the diode D5 is connected with one end of the sliding rheostat 2, the cathode of the light emitting diode D4 is connected with the other end of the sliding rheostat 2, the other end of the resistor R19 and one end of the capacitor C14, the emitter of the triode Q3 is simultaneously connected with the anode of the diode D5, the other end of the resistor R18, the cathode of the thermistor RT1 and the other end of the capacitor C14.
In one embodiment, the noise detection module comprises: the sensor comprises a resistor R21, a capacitor C19, a sensor A1, a capacitor C17, an amplifier U4, an amplifier U5, a slide rheostat RV3, a diode D8, a resistor R20, a capacitor C18, a diode D7, a triode Q5, a light-emitting diode D6, a capacitor C16 and a capacitor C15; wherein, one end of the sensor a1 is connected to one end of the capacitor C19 and one end of the resistor R21 at the same time, the other end of the sensor a1 is connected to one end of the capacitor C17, one end of the capacitor C18, the anode of the diode D7 and one end of the capacitor C16, the No. 5 pin of the amplifier U5 is connected to the other end of the capacitor C19, the No. 6 pin of the amplifier U4 is connected to the other end of the capacitor C17 and one end and the adjustable end of the slide rheostat RV3 at the same time, the No. 7 pin of the amplifier U4 is connected to the anode of the diode D8 and the other end of the slide rheostat RV3 at the same time, the No. 3 pin of the amplifier U5 is connected to the cathode of the diode D8 and one end of the capacitor C18 at the same time, the No. 2 pin of the amplifier U5 is connected to the cathode of the diode D7 and one end of the resistor R20 at the same, pin 1 of the amplifier U5 is connected to the base of the transistor Q5, pin 11 of the amplifier U5 is connected to the other end of the resistor R20, the other end of the resistor R21, pin 11 of the amplifier U4, and one end of the capacitor C15, pin 4 of the amplifier U5 is connected to pin 4 of the amplifier U4, the negative electrode of the led D6, and the other end of the capacitor C16, respectively, and the emitter of the transistor Q5 is connected to the positive electrode of the led D6.
A monitoring method for a photoelectric sensor switch monitoring protection circuit is characterized by comprising the following steps:
in the formula, the amplitude ratio of the input signal and the output signal of the sensor is obtained by changing according to the size of the frequency, so that the static characteristic is influenced by the dynamic characteristic of the sensor.
In one embodiment, according to said step 2 is further;
step 2-1, according to the existence property of the random error of the static characteristic, the calibration data with the repeatability dispersion degree generates transformation along with the increase of the calibration times, so that the maximum deviation value is different from the minimum deviation value; thus, the repeatability error is expressed by Ex, and then is obtained;
in the formula (I), the compound is shown in the specification,
represents the standard deviation;
step 2-2, according to the difference between the measurement times and the single measurement values and the measurement average values, representing the single measurement values by Yi, the measurement average values by Yt and the measurement times by n, and obtaining the measurement result;
in the formula, the same test value is input multiple times, so that the output characteristic curves overlap each other, and the obtained error is smaller.
Has the advantages that: the invention relates to a monitoring protection circuit and a monitoring method for a photoelectric sensor switch, wherein a monitoring protection unit is used for monitoring an external environment, and a temperature detection module is used for detecting the external environment and the temperature of a photoelectric switch through a thermistor so as to ensure that the external environment does not influence the normal operation of equipment, so that the power supply of the equipment is carried out, the temperature of the photoelectric switch is monitored, and the switch failure caused by overhigh temperature of the equipment during long-time operation is prevented; the noise detection module is used for carrying out noise audio detection on the working environment and reminding workers to reduce noise; the normal work of equipment is guaranteed to the mistake of solving the photoelectric sensor switch touches the condition.
Drawings
FIG. 1 is a flow chart of the operation of the present invention.
Fig. 2 is a circuit diagram of the rectifying and voltage-stabilizing module of the present invention.
Fig. 3 is a circuit diagram of a modulation module of the present invention.
Fig. 4 is a circuit diagram of an amplification module of the present invention.
Fig. 5 is a circuit diagram of a demodulation module of the present invention.
Fig. 6 is a circuit diagram of the temperature detection module of the present invention.
Fig. 7 is a circuit diagram of a noise detection module of the present invention.
Fig. 8 is a graph of a repetitive measurement of static characteristics of the present invention.
Detailed Description
As shown in fig. 1, in this embodiment, a photosensor switch monitoring protection circuit includes: the device comprises a power supply unit, a signal transmitting unit, a signal receiving unit and a monitoring protection unit; wherein, the monitoring protection unit further comprises: the device comprises a noise detection module and a temperature detection module;
the power supply unit inputs voltage into equipment, and converts alternating current into direct current and stable output voltage through the rectification and voltage stabilization module;
the signal emission unit controls the carrier waveform of the acquired signal through a modulation module by using baseband pulses, so that the signal emission unit conforms to the emission standard of a signal emission tube;
the signal receiving unit converts the received optical pulse into an electrical pulse signal by using the demodulation module, and simultaneously amplifies the received signal by using the amplification module and transmits the amplified signal to a load;
the monitoring protection unit utilizes the noise detection module and the temperature detection module to detect the external environment, so that the normal work of the sensor is not influenced by the external environment.
As shown in fig. 2, the rectifying and voltage stabilizing module includes: transformer TR1, fuse FU1, bridge type voltage stabilizing diode BR1, capacitor C1, diode D1, voltage stabilizer U1, slide rheostat RV1, triode Q1, capacitor C2, polarity capacitor C3, resistor R1 and resistor R2.
In a further embodiment, a positive input terminal of the transformer TR1 is connected to one end of the fuse FU1, a negative input terminal of the transformer TR1 is connected to a power supply, another end of the fuse FU1 is connected to the power supply, a positive output terminal of the transformer TR1 is connected to a positive input terminal of the zener diode BR1, a negative output terminal of the transformer TR1 is connected to a negative input terminal of the zener diode BR1, a negative output terminal of the zener diode BR1 is connected to one end of the capacitor C1, an emitter of the transistor Q1, an adjustable terminal of the sliding resistor RV1, and one end of the resistor R2, a positive output terminal of the zener diode BR1 is connected to the other end of the capacitor C1, a pin No. 1 of the regulator U1, and a positive terminal of the diode D1, a pin No. 2 of the regulator U1 is connected to one end of the sliding resistor RV1, a terminal of the sliding resistor R1, and a negative output terminal of the regulator BR, The collector of the triode Q1, one end of the resistor R1 and the other end of the resistor R2 are connected, the base of the triode Q1 is connected with the other end of the slide rheostat RV1, the pin No. 3 of the voltage stabilizer U1 is simultaneously connected with one end of the capacitor C2, the cathode of the diode D1, the anode of the polar capacitor C3 and the other end of the resistor R1, and the cathode of the polar capacitor C3 and the other end of the capacitor C2 are connected and grounded.
In a further embodiment, the voltage is converted into direct current by a transformer TR1 and transmitted to a bridge type voltage stabilizing diode BR1 for bridge rectification, the capacitor C1 filters the direct current, the voltage is transmitted by a diode D1, a voltage stabilizer U1 stabilizes the voltage so as to meet the operating requirement of the equipment, the slide rheostat RV1 regulates and controls the circuit impedance so that the output current meets the operating index, and the triode Q1 cuts off and conducts the voltage so as to protect and output the switch action resistor R1 and the resistor R2.
As shown in fig. 3, the modulation module includes: the circuit comprises a resistor R3, a resistor R4, a resistor R5, an operational amplifier U2, a capacitor C5, a resistor R6, a capacitor C4, a diode D2, a capacitor C6, a resistor R7 and a diode D3.
In a further embodiment, the pin No. 1 and the pin No. 2 of the operational amplifier U2 are connected with one end of the resistor R3, the other end of the resistor R3 is connected with the working voltage, the pin No. 3 of the operational amplifier U2 is simultaneously connected with one end of the resistor R4, one end of the resistor R5, one end of the resistor R6, one end of the resistor R7 and the anode of the diode D2, pin 6 of the operational amplifier U2 is connected with one end of the capacitor C4 and inputs 15V voltage, pin 4 of the operational amplifier U2 is connected to one end of the capacitor C5 and outputs a 15 voltage, the No. 5 pin of the operational amplifier U2 is simultaneously connected with one end of the capacitor C6, the cathode of the diode D2 and the anode of the diode D3, the other end of the capacitor C6 is connected to the other end of the resistor R6, and the cathode of the diode D3 is connected to and outputs the other end of the resistor R7.
In a further embodiment, the diode D2 prevents the output of the operational amplifier U2 from shifting below 0.3V of the diode D3, which would create a voltage drop condition that would not occur in the output, by using the operational amplifier U2 to lower the diode to a near ideal zero level; therefore, hundred-percent modulation of signal amplitude is achieved, meanwhile, the resistor R4 and the resistor R5 perform signal input protection, the resistor R3 performs working voltage input protection, and the diode D3 conducts signals.
As shown in fig. 4, the amplification module includes: the circuit comprises a triode Q2, a resistor R14, a resistor R15, a resistor R13, a resistor R16, a capacitor C11, a capacitor C12 and a capacitor C13.
In a further embodiment, a base of the transistor Q2 is simultaneously connected to one end of the resistor R14, one end of the capacitor C11 and one end of the resistor R13, a collector of the transistor Q2 is simultaneously connected to one end of the capacitor C12 and one end of the resistor R16, an emitter of the transistor Q2 is simultaneously connected to one end of the resistor R15 and one end of the capacitor C13, the other end of the resistor R13 is simultaneously connected to the other end of the resistor R15 and the other end of the capacitor C13, and the other end of the resistor R14 is connected to the other end of the resistor R16.
In a further embodiment, the signal is amplified by the transistor Q2, the signal enters the module circuit through the capacitor C11, the resistor R13 is connected in parallel with the resistor R14 for stabilization, the signal flows in through the base of the transistor Q2, meanwhile, the resistor R16 increases the impedance, the input voltage is protected, the signal enters through the collector of the transistor Q2, the signal is amplified, and the signal is output through the emitter of the transistor Q2, so that the signal amplification is realized.
As shown in fig. 5, the demodulation module includes: the integrated intermediate frequency amplifier circuit comprises an integrated intermediate frequency amplifier U3, a resistor R8, a resistor R9, a capacitor C7, a diode D4, a capacitor C9, a resistor R10, a resistor R11, a resistor R12, a capacitor C10 and a capacitor C8.
In a further embodiment, pin No. 2 of the integrated if amplifier U3 is connected to one end of the resistor R11, pin No. 1 of the integrated if amplifier U3 is connected to one end of the resistor R11 and one end of the resistor R12 at the same time, pin No. 3 of the integrated if amplifier U3 is connected to pin No. 4 and pin No. 5, pin No. 7 of the integrated if amplifier U3 is connected to one end of the resistor R10 and one end of the capacitor C9 at the same time, pin No. 6 of the integrated if amplifier U3 is connected to one end of the resistor R6, the other end of the resistor R9 is connected to one end of the resistor R8 and one end of the capacitor C7, pin No. 8 and pin No. 9 of the integrated if amplifier U3 are connected to one end of the capacitor C8, the other end of the capacitor C8 is connected to one end of the capacitor C10, and pin No. 10 of the integrated if amplifier U3 is connected to the other end of the resistor R8 at the same time, The other end of the capacitor C7, the anode of the diode D4, the other end of the capacitor C9, the other end of the resistor R10, the other end of the resistor R12 and the other end of the capacitor C10 are connected.
In a further embodiment, after the signal is amplified by the amplifying module, the signal is transmitted to the integrated intermediate frequency amplifier U3 for demodulation, and meanwhile, the signal is input to the integrated intermediate frequency amplifier U3, and the impedance of the circuit is increased by using the resistor R11 and the resistor R12, so that the quality of the transmitted signal is protected, and the impedance of the capacitor C9 and the resistor R10 to the high-frequency signal is reduced, so that the rising speed of the signal is increased, and the response speed is increased; the resistor R8 and the resistor R9 are connected in parallel to perform a shunting function, the diode D4 conducts and outputs, and the capacitor C10 filters the current to ensure the current quality and reduce interference.
As shown in fig. 6, the temperature detection module includes: triode Q3, light emitting diode D4, resistor R17, diode D5, slide rheostat RV2, triode Q4, resistor R18, thermistor RT1, resistor R19 and capacitor C14.
In a further embodiment, the base of the transistor Q3 is connected to one end of the resistor R17, the collector of the transistor Q3 is connected with the anode of the LED D4, the other end of the resistor R17 is connected with one end of the resistor R18 and the collector of the transistor Q4, the base electrode of the triode Q4 is simultaneously connected with the anode of the thermistor RT1 and one end of the resistor R19, the emitter of the triode Q4 is connected with the adjustable end of the slide rheostat RV2, the cathode of the diode D5 is connected with one end of the slide rheostat RV2, the cathode of the light emitting diode D4 is simultaneously connected with the other end of the slide rheostat RV2, the other end of the resistor R19 and one end of the capacitor C14, the emitter of the triode Q3 is simultaneously connected with the anode of the diode D5, the other end of the resistor R18, the cathode of the thermistor RT1 and the other end of the capacitor C14.
In a further embodiment, the temperature detection module detects the temperature of the working environment of the device in a bridging mode, the thermistor RT1 serves as a bridge arm, if the working temperature exceeds the preset working temperature of the working device, the light emitting diode D4 emits light to remind a worker that the external temperature is too high, meanwhile, the slide rheostat RV2 is used for presetting voltage, if the working voltage is higher than the working voltage, the triode Q4 is conducted, the triode Q3 is also conducted, meanwhile, the light emitting diode D4 is continuously conducted and emits light, otherwise, when the working voltage is lower than the working voltage, the triode Q3 and the triode Q4 are both cut off, the light emitting diode D4 is extinguished, and the photoelectric switch works; while diode D5 acts to reduce the supply voltage and thereby reduce the generation of drift.
As shown in fig. 7, the noise detection module includes: the sensor comprises a resistor R21, a capacitor C19, a sensor A1, a capacitor C17, an amplifier U4, an amplifier U5, a slide rheostat RV3, a diode D8, a resistor R20, a capacitor C18, a diode D7, a triode Q5, a light-emitting diode D6, a capacitor C16 and a capacitor C15.
In a further embodiment, one end of the sensor a1 is connected to one end of the capacitor C19 and one end of the resistor R21, the other end of the sensor a1 is connected to one end of the capacitor C17, one end of the capacitor C18, the anode of the diode D7 and one end of the capacitor C16, respectively, pin No. 5 of the amplifier U5 is connected to the other end of the capacitor C19, pin No. 6 of the amplifier U4 is connected to the other end of the capacitor C17 and one end and an adjustable end of the sliding rheostat RV3, pin No. 7 of the amplifier U4 is connected to the anode of the diode 56pd 8 and the other end of the sliding rheostat RV3, pin No. 3 of the amplifier U5 is connected to the cathode of the diode D8 and one end of the capacitor C18, pin No. 2 of the amplifier U5 is connected to the cathode of the diode D7 and one end of the resistor R20, pin 1 of the amplifier U5 is connected to the base of the transistor Q5, pin 11 of the amplifier U5 is connected to the other end of the resistor R20, the other end of the resistor R21, pin 11 of the amplifier U4, and one end of the capacitor C15, pin 4 of the amplifier U5 is connected to pin 4 of the amplifier U4, the negative electrode of the led D6, and the other end of the capacitor C16, respectively, and the emitter of the transistor Q5 is connected to the positive electrode of the led D6.
In a further embodiment, the sensor a1 works by accessing working voltage, the capacitor C19 and the resistor R21 increase the signal transmission speed, the signal is amplified by the amplifier U4, so that the slide rheostat RV3 adjusts working impedance, and conducts and outputs the signal and the diode D8, at this time, current is filtered by the capacitor C18, the impedance ensures safety and signal quality of the work, the signal is detected and compared by the amplifier U5, when the inductance temperature signal is greater than a working preset value, the signal is output to the triode Q5 to conduct and output, and the light emitting diode D6 emits light to remind a worker, otherwise, the output protection is performed by the capacitor C15, and the photoelectric switch works.
A monitoring method for a photoelectric sensor switch monitoring protection circuit is characterized by comprising the following steps:
step (ii) of3. According to the frequency response characteristic of the sensor, the static characteristic is influenced by the dynamic characteristic of the frequency due to the consistency of error caused by non-repeatability, so that the frequency response characteristic is obtained according to Fourier transform
Which is indicative of the frequency response of the antenna,
which is indicative of a periodic response to the signal,
the time response is represented by the time-response,
representing the input-to-output amplitude ratio, resulting in:
in the formula, the amplitude ratio of the input signal and the output signal of the sensor is obtained by changing according to the size of the frequency, so that the static characteristic is influenced by the dynamic characteristic of the sensor.
In a further embodiment, according to said step 2 is further;
step 2-1, according to the existence property of the random error of the static characteristic, the calibration data with the repeatability dispersion degree generates transformation along with the increase of the calibration times, so that the maximum deviation value is different from the minimum deviation value; thus, the repeatability error is expressed by Ex, and then is obtained;
in the formula (I), the compound is shown in the specification,
represents the standard deviation;
step 2-2, according to the difference between the measurement times and the single measurement values and the measurement average values, representing the single measurement values by Yi, the measurement average values by Yt and the measurement times by n, and obtaining the measurement result;
in the formula, the same test value is input multiple times, so that the output characteristic curves overlap each other, and the obtained error is smaller.
The working principle is as follows: according to the invention, before the photoelectric sensor switch works, the external temperature and the noise quality are detected, the external noise detection is carried out through the noise detection module, the temperature detection module carries out temperature detection and transmits signals to the control terminal to remind workers, meanwhile, when the working condition is met, the power supply unit supplies power to circuits and equipment, and the rectifying and voltage stabilizing module carries out circuit current transformation and voltage temperature conversion, so that the input voltage is normal working voltage, and thus, the damage of components and parts caused by overlarge voltage is eliminated, wherein the fuse FU1 is protected, and when the voltage is overhigh, the fuse FU1 is damaged, so that the power supply is automatically turned off; the signal emission unit converts the collected optical signal into an electric signal and modulates the signal through the modulation module, so that the signal frequency meets the requirement of output regulation, the signal is sent to the signal receiving unit through the emission tube, the received signal is subjected to signal stabilization through the amplification module, meanwhile, the signal reduces the loss of circuit transmission, the demodulation module decomposes the signal, and meanwhile, when the switch triggering condition is met, the photoelectric sensor switch is switched on, and the load equipment works.
It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. The invention is not described in detail in order to avoid unnecessary repetition.
Claims (9)
1. A photosensor switch monitoring protection circuit, comprising: the device comprises a power supply unit, a signal transmitting unit, a signal receiving unit and a monitoring protection unit; wherein, the monitoring protection unit further comprises: the device comprises a noise detection module and a temperature detection module;
the power supply unit inputs voltage into equipment, and converts alternating current into direct current and stable output voltage through the rectification and voltage stabilization module; the rectification and voltage stabilization module comprises: transformer TR1, fuse FU1, bridge type voltage stabilizing diode BR1, capacitor C1, diode D1, voltage stabilizer U1, slide rheostat RV1, triode Q1, capacitor C2, polarity capacitor C3, resistor R1 and resistor R2; an anode input end of the transformer TR1 is connected to one end of the fuse FU1, a cathode input end of the transformer TR1 is connected to a power supply, the other end of the fuse FU1 is connected to the power supply, an anode output end of the transformer TR1 is connected to an anode input end of the bridge zener diode BR1, a cathode output end of the transformer TR1 is connected to a cathode input end of the bridge zener diode BR1, an anode output end of the bridge zener diode BR1 is simultaneously connected to one end of the capacitor C1, an emitter of the triode Q1, an adjustable end of the sliding varistor RV1 and one end of the resistor R2, an anode output end of the bridge zener diode BR1 is respectively connected to the other end of the capacitor C1, a pin 1 of the varistor U1 and an anode of the diode D1, a pin 2 of the varistor U1 is simultaneously connected to one end of the sliding varistor 1, a terminal of the transformer FU 3536, and a cathode output end of the transformer TR, A collector of the triode Q1, one end of the resistor R1 and the other end of the resistor R2 are connected, a base of the triode Q1 is connected with the other end of the slide rheostat RV1, a pin No. 3 of the voltage stabilizer U1 is simultaneously connected with one end of the capacitor C2, a cathode of the diode D1, an anode of the polar capacitor C3 and the other end of the resistor R1, and a cathode of the polar capacitor C3 and the other end of the capacitor C2 are connected and grounded;
the signal emission unit controls the carrier waveform of the acquired signal through a modulation module by using baseband pulses, so that the signal emission unit conforms to the emission standard of a signal emission tube;
the signal receiving unit converts the received optical pulse into an electrical pulse signal by using the demodulation module, and simultaneously amplifies the received signal by using the amplification module and transmits the amplified signal to a load;
the monitoring protection unit utilizes the noise detection module and the temperature detection module to detect the external environment, so that the normal work of the sensor is not influenced by the external environment.
2. The photosensor switch monitoring protection circuit of claim 1, wherein the modulation module comprises: a resistor R3, a resistor R4, a resistor R5, an operational amplifier U2, a capacitor C5, a resistor R6, a capacitor C4, a diode D2, a capacitor C6, a resistor R7 and a diode D3; wherein, the No. 1 pin and the No. 2 pin of the operational amplifier U2 are connected with one end of the resistor R3, the other end of the resistor R3 is connected with the working voltage, the pin No. 3 of the operational amplifier U2 is simultaneously connected with one end of the resistor R4, one end of the resistor R5, one end of the resistor R6, one end of the resistor R7 and the anode of the diode D2, pin 6 of the operational amplifier U2 is connected with one end of the capacitor C4 and inputs 15V voltage, pin 4 of the operational amplifier U2 is connected to one end of the capacitor C5 and outputs a 15 voltage, the No. 5 pin of the operational amplifier U2 is simultaneously connected with one end of the capacitor C6, the cathode of the diode D2 and the anode of the diode D3, the other end of the capacitor C6 is connected to the other end of the resistor R6, and the cathode of the diode D3 is connected to and outputs the other end of the resistor R7.
3. The photosensor switch monitoring protection circuit of claim 1, wherein the amplification module comprises: the circuit comprises a triode Q2, a resistor R14, a resistor R15, a resistor R13, a resistor R16, a capacitor C11, a capacitor C12 and a capacitor C13; the base of the triode Q2 is connected to one end of the resistor R14, one end of the capacitor C11 and one end of the resistor R13, the collector of the triode Q2 is connected to one end of the capacitor C12 and one end of the resistor R16, the emitter of the triode Q2 is connected to one end of the resistor R15 and one end of the capacitor C13, the other end of the resistor R13 is connected to the other end of the resistor R15 and the other end of the capacitor C13, and the other end of the resistor R14 is connected to the other end of the resistor R16.
4. The photosensor switch monitoring protection circuit of claim 1, wherein the demodulation module comprises: the integrated intermediate frequency amplifier U3, a resistor R8, a resistor R9, a capacitor C7, a diode D4, a capacitor C9, a resistor R10, a resistor R11, a resistor R12, a capacitor C10 and a capacitor C8; pin 2 of the integrated intermediate frequency amplifier U3 is connected to one end of the resistor R11, pin 1 of the integrated intermediate frequency amplifier U3 is connected to one end of the resistor R11 and one end of the resistor R12, pin 3 of the integrated intermediate frequency amplifier U3 is connected to pin 4 and pin 5, pin 7 of the integrated intermediate frequency amplifier U3 is connected to one end of the resistor R10 and one end of the capacitor C9, pin 6 of the integrated intermediate frequency amplifier U3 is connected to one end of the resistor R6, the other end of the resistor R9 is connected to one end of the resistor R8 and one end of the capacitor C7, pin 8 and pin 9 of the integrated intermediate frequency amplifier U3 are connected to one end of the capacitor C8, the other end of the capacitor C8 is connected to one end of the capacitor C10, and pin 10 of the integrated intermediate frequency amplifier U3 is connected to the other end of the resistor R8 The other end of the capacitor C7, the anode of the diode D4, the other end of the capacitor C9, the other end of the resistor R10, the other end of the resistor R12 and the other end of the capacitor C10 are connected.
5. The photosensor switch monitoring protection circuit of claim 1, wherein the temperature detection module comprises: a triode Q3, a light emitting diode D4, a resistor R17, a diode D5, a sliding rheostat RV2, a triode Q4, a resistor R18, a thermistor RT1, a resistor R19 and a capacitor C14, wherein the base of the triode Q3 is connected with one end of the resistor R17, the collector of the triode Q3 is connected with the anode of the light emitting diode D4, the other end of the resistor R17 is connected with one end of the resistor R18 and the collector of the triode Q4, the base of the triode Q4 is connected with the anode of the thermistor RT1 and one end of the resistor R19, the emitter of the triode Q4 is connected with the adjustable end of the sliding rheostat RV2, the cathode of the diode D5 is connected with one end of the sliding rheostat 2, the cathode of the light emitting diode D4 is connected with the other end of the sliding rheostat 2, the other end of the resistor R19 and one end of the capacitor C14, the emitter of the triode Q3 is simultaneously connected with the anode of the diode D5, the other end of the resistor R18, the cathode of the thermistor RT1 and the other end of the capacitor C14.
6. The photosensor switch monitoring protection circuit of claim 1, wherein the noise detection module comprises: the sensor comprises a resistor R21, a capacitor C19, a sensor A1, a capacitor C17, an amplifier U4, an amplifier U5, a slide rheostat RV3, a diode D8, a resistor R20, a capacitor C18, a diode D7, a triode Q5, a light-emitting diode D6, a capacitor C16 and a capacitor C15; wherein, one end of the sensor a1 is connected to one end of the capacitor C19 and one end of the resistor R21 at the same time, the other end of the sensor a1 is connected to one end of the capacitor C17, one end of the capacitor C18, the anode of the diode D7 and one end of the capacitor C16, the No. 5 pin of the amplifier U5 is connected to the other end of the capacitor C19, the No. 6 pin of the amplifier U4 is connected to the other end of the capacitor C17 and one end and the adjustable end of the slide rheostat RV3 at the same time, the No. 7 pin of the amplifier U4 is connected to the anode of the diode D8 and the other end of the slide rheostat RV3 at the same time, the No. 3 pin of the amplifier U5 is connected to the cathode of the diode D8 and one end of the capacitor C18 at the same time, the No. 2 pin of the amplifier U5 is connected to the cathode of the diode D7 and one end of the resistor R20 at the same, pin 1 of the amplifier U5 is connected to the base of the transistor Q5, pin 11 of the amplifier U5 is connected to the other end of the resistor R20, the other end of the resistor R21, pin 11 of the amplifier U4, and one end of the capacitor C15, pin 4 of the amplifier U5 is connected to pin 4 of the amplifier U4, the negative electrode of the led D6, and the other end of the capacitor C16, respectively, and the emitter of the transistor Q5 is connected to the positive electrode of the led D6.
7. The photosensor switch monitoring and protecting circuit of claim 4, wherein the model number of the integrated intermediate frequency amplifier U3 is CA 3046.
8. The method of monitoring a photosensor switch monitoring protection circuit of any one of claims 1 to 7, comprising:
step 1, representing data of static characteristic repeatability tests in the form of an algebraic equation and a characteristic curve, so that the maximum unrepeated output error is represented by max and the full-scale output value is represented by YFS according to a formula;
step 2, obtaining the error rate according to the non-repeatability property and the limit error rate;
step 3, according to the frequency response characteristic of the sensor,because of the consistency of error due to non-repeatability, the frequency dynamic characteristic influences the static characteristic, thereby obtaining the frequency dynamic characteristic according to Fourier transform
Which is indicative of the frequency response of the antenna,
which is indicative of a periodic response to the signal,
the time response is represented by the time-response,
representing the input-to-output amplitude ratio, resulting in:
step 4,
The frequency response is a complex function of the frequency,
the real part frequency response is represented and,
the imaginary frequency response is represented, so that:
in the formula, the amplitude ratio of the input signal and the output signal of the sensor is obtained by changing according to the size of the frequency, so that the static characteristic is influenced by the dynamic characteristic of the sensor.
9. The monitoring method of the monitoring protection circuit of the photoelectric sensor switch according to claim 8, wherein the step 2 of the static characteristic repeatability test method is further obtained;
step 2-1, according to the existence property of the random error of the static characteristic, the calibration data with the repeatability dispersion degree generates transformation along with the increase of the calibration times, so that the maximum deviation value is different from the minimum deviation value; thus, the repeatability error is expressed by Ex, and then is obtained;
in the formula (I), the compound is shown in the specification,
represents the standard deviation;
step 2-2, according to the difference between the measurement times and the single measurement values and the measurement average values, representing the single measurement values by Yi, the measurement average values by Yt and the measurement times by n, and obtaining the measurement result;
in the formula, the same test value is input multiple times, so that the output characteristic curves overlap each other, and the obtained error is smaller.
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| CN202010192430.3A CN111404531A (en) | 2020-03-18 | 2020-03-18 | Photoelectric sensor switch monitoring protection circuit and monitoring method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112220399A (en) * | 2020-09-04 | 2021-01-15 | 南京蹑波物联网科技有限公司 | Global positioning system, intelligent sweeping robot with global positioning system and working method of intelligent sweeping robot |
| CN117146972A (en) * | 2023-10-25 | 2023-12-01 | 中诚华隆计算机技术有限公司 | Infrared test method based on SOC chip |
-
2020
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112220399A (en) * | 2020-09-04 | 2021-01-15 | 南京蹑波物联网科技有限公司 | Global positioning system, intelligent sweeping robot with global positioning system and working method of intelligent sweeping robot |
| CN117146972A (en) * | 2023-10-25 | 2023-12-01 | 中诚华隆计算机技术有限公司 | Infrared test method based on SOC chip |
| CN117146972B (en) * | 2023-10-25 | 2023-12-29 | 中诚华隆计算机技术有限公司 | Infrared test method based on SOC chip |
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