Intelligent chemical site construction environment detection device
A construction environment and detection device technology, applied in the direction of measuring devices, instruments, signal transmission systems, etc., can solve the problems of signal transmission attenuation, susceptibility to interference, etc.
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Embodiment 1
[0017] Embodiment 1, an intelligent industrial site construction environment detection device, including a data acquisition module, a communication module, a monitoring platform, and an execution module. The data acquisition module detects the construction environment parameters of the construction site through sensors, and transmits them to the information monitoring platform through the communication module. Monitoring, and can control the execution module to carry out warning equipment alarm and control equipment treatment. The construction site construction environment parameter signal detected by the sensor is processed by the signal receiving circuit, frequency modulation main circuit, and feedback frequency modulation amplitude modulation circuit, and then directly transmitted to the monitoring platform through the transmitter;
[0018] The signal receiving circuit adopts operational amplifier AR4 and triode Q1 as the core constant voltage source to provide a stable power...
Embodiment 2
[0019] Embodiment 2. On the basis of Embodiment 1, the signal receiving circuit uses the operational amplifier AR4 and the transistor Q1 as the core constant voltage source to provide a stable power supply for the sensor X1. The specific power supply is determined by the voltage regulator tube Z1 The voltage value and the voltage adjustment fed back from the adjustable end of the potentiometer RP1, the triode Q1 eliminates the small fluctuation voltage to provide a constant voltage, which is further filtered by the inductor L1, and the construction site environmental signal detected by the sensor X1 is filtered by the capacitor C1 and then added to the The input end of the differential amplifier circuit composed of operational amplifiers AR1, AR2, and AR3 performs differential balance amplification processing, suppresses common-mode interference, and amplifies the signal output by the sensor. Among them, the operational amplifier AR3 is a subtractive proportional amplifier. The...
Embodiment 3
[0021] Embodiment 3, on the basis of Embodiment 2, the feedback frequency modulation and amplitude modulation circuit is used for when the frequency signal is disturbed and the frequency deviation of the high frequency signal occurs, the triode Q7 is turned on, the triode Q7 is turned on, and the frequency modulation main circuit is filtered After the signal is limited by diode D3, it is added to the frequency-to-voltage conversion circuit composed of transistor Q5, transistor Q6, diode D2, electrolytic capacitor E5, and resistor R13 to convert it into a voltage signal (0-5V), and then enters the inverting input terminal of operational amplifier AR6 Compared with the reference signal of the non-inverting input terminal (that is, the voltage signal corresponding to the optimal transmission frequency signal in the construction environment of the construction site), the difference signal is fed back to the capacitor three-point oscillator circuit to change the capacitance of the va...
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