阅读说明：本技术 一种水务信号传输防阻塞电路 (Water affair signal transmission prevents blocking circuit ) 是由 李伟 张帆 陈方亮 王辉 魏琪 乔森 黄丽娜 张玉 彭丁丁 刘毅 张海生 王欣 于 2019-11-28 设计创作，主要内容包括：本发明公开了一种水务信号传输防阻塞电路，包括运放接收电路、反馈校准电路和限幅输出电路，所述运放接收电路接收水务控制终端解调后的信号，反馈校准电路运用运放器AR2、运放器AR3和二极管D3组成脉宽调节电路扩大信号脉宽，同时运用可控硅VTL1和稳压管D2组成异常信号检测电路检测运放器AR2输出信号，然后运用三极管Q1和电容C4组成的延时电路对信号延时后输入运放器AR4同相输入端内，其中三极管Q3检测延时电路输出信号和运放器AR2输出信号电位差，调节运放器AR3同相输入端信号振幅，最后限幅输出电路运用二极管D5?二极管D8和运放器AR1组成限幅电路对信号限幅?放大?限幅调节，实现了对水务控制终端接收的信号扩大脉宽，起到防止信号阻塞的作用。(The invention discloses a water service signal transmission anti-blocking circuit, which comprises an operational amplifier receiving circuit, a feedback calibration circuit and an amplitude limiting output circuit, wherein the operational amplifier receiving circuit receives a signal demodulated by a water service control terminal, the feedback calibration circuit uses an operational amplifier AR2, an operational amplifier AR3 and a diode D3 to form a pulse width adjusting circuit to enlarge the signal pulse width, simultaneously uses a silicon controlled rectifier VTL1 and a voltage stabilizing tube D2 to form an abnormal signal detection circuit to detect the output signal of the operational amplifier AR2, then uses a delay circuit consisting of a triode Q1 and a capacitor C4 to delay the signal and input the signal into the non-inverting input end of the operational amplifier AR4, wherein the triode Q3 detects the output signal of the delay circuit and the output signal potential difference of the operational amplifier AR2 to adjust the signal amplitude of the non-inverting input end of the operational amplifier AR3, and finally the amplitude limiting output circuit uses the diode D5-diode D8 and the operational amplifier 1 to form an amplitude limiting circuit to adjust, the pulse width of the signal received by the water service control terminal is enlarged, and the effect of preventing signal blockage is achieved.)

1. A water service signal transmission anti-blocking circuit comprises an operational amplifier receiving circuit, a feedback calibration circuit and an amplitude limiting output circuit, and is characterized in that the operational amplifier receiving circuit receives a signal demodulated by a water service control terminal, the feedback calibration circuit uses an operational amplifier AR2, an operational amplifier AR3 and a diode D3 to form a pulse width adjusting circuit to enlarge the signal pulse width, simultaneously uses a variable resistor RW1, a diode D4 and a diode D9 to form a rectifying circuit to rectify the signal and input the signal into the non-inverting input end of the operational amplifier AR4, uses a thyristor VTL1 and a voltage stabilizing tube D2 to form an abnormal signal detecting circuit to detect the output signal of the operational amplifier AR2, then uses a delay circuit consisting of a triode Q1 and a capacitor C4 to delay the signal and input the signal into the non-inverting input end of the operational amplifier AR4, wherein the triode Q3 detects the output signal of the delay circuit and the potential difference of the output signal of the operational amplifier AR2 to adjust the amplitude of the non, and finally, the amplitude limiting output circuit forms an amplitude limiting circuit by using a diode D5-a diode D8 and an operational amplifier AR1 to carry out amplitude limiting-amplification-amplitude limiting regulation on the signal, and the amplitude limiting circuit is input into a data receiving port of the single chip microcomputer in the water service control terminal.

2. The water service signal transmission anti-blocking circuit as claimed in claim 1, wherein the feedback calibration circuit includes an operational amplifier AR2, an inverting input terminal of the operational amplifier AR2 is connected to one terminal of a resistor R3 and a capacitor C2, the other terminal of the capacitor C2 is connected to ground, the other terminal of the resistor R3 is connected to one terminal of a resistor R4 and an inverting input terminal of an operational amplifier AR3, the other terminal of a resistor R4 is connected to one terminal of a resistor R5 and an anode of a diode D3, the other terminal of the resistor R5 is connected to a power supply +5V, the inverting input terminal of the operational amplifier AR3 is connected to one terminal of a resistor R6, one terminal of a resistor R7 and a power supply +5V, the other terminal of the resistor R6 is connected to ground, the other terminal of the resistor R6 and an anode of a diode D6, one terminal of an output terminal of the operational amplifier R6 and an anode of a thyristor vtr 6 and a thyristor vtr 6 are connected to a cathode of a thyristor, One end of a capacitor C3, the other ends of the resistor R3 and the capacitor C3 are grounded, the other end of the resistor R3 is connected with the base of the transistor Q3 and one end of the resistor R3 and one end of the capacitor C3, the emitter of the transistor Q3 and the other end of the resistor R3 are connected with a +5V power supply, the collector of the transistor Q3 is connected with the collector of the transistor Q3, the non-inverting input end of the operational amplifier AR3 and the contact 3 of the variable resistor RW 3, one end of the resistor R3 and the other end of the capacitor C3 are grounded, the other end of the resistor R3 is connected with the collector of the transistor Q3, the non-inverting input end of the operational amplifier RW 3, the non-inverting input end of the resistor R3 is connected with the ground, the other end of the resistor R3 is connected with the base of the transistor Q3 and the anode of the diode D3, the cathode of the diode D3 and one end of the capacitor C3, the cathode of the negative electrode of the diode D3 is connected with the inverting input end of the contact R, One end of the resistor R15, the other end of the resistor R14 is grounded, and the other end of the resistor R15 is connected to the output end of the amplifier AR 4.

3. The water service signal transmission anti-blocking circuit as claimed in claim 1, wherein the amplitude limiting output circuit includes a diode D5, the cathode of the diode D5 is connected to the anode of the diode D6 and the output end of the operational amplifier AR4, the anode of the diode D5 is connected to the cathode of the diode D6 and one end of a resistor R16, the non-inverting input end of the operational amplifier AR5, the inverting input end of the operational amplifier AR5 is connected to one end of a resistor R17, the other end of the resistor R17 is connected to ground, the output end of the operational amplifier AR5 is connected to the other end of the resistor R16 and the cathode of the diode D7, the anode of the diode D8, and the anode of the diode D7 is connected to the cathode of the diode D8 and the data receiving port of the single chip microcomputer in the water service control.

4. The water service signal transmission anti-blocking circuit as claimed in claim 1, wherein said operational amplifier receiving circuit includes a resistor R1, one end of the resistor R1 is connected to the negative pole of the voltage regulator tube D1 and the signal receiving port of the water service control terminal, the positive pole of the voltage regulator tube D1 is grounded, the other end of the resistor R1 is connected to the non-inverting input terminal of the operational amplifier AR1 and one end of the resistor R2 and the capacitor C1, the inverting input terminals of the capacitor C1 and the operational amplifier AR1 are grounded, and the output end of the operational amplifier AR1 is connected to the other end of the resistor R2 and the non-inverting input terminal of the operational amplifier AR 2.

Technical Field

The invention relates to the technical field of circuits, in particular to a water service signal transmission anti-blocking circuit.

Background

At present, in the transmission process of a water affair data signal, the data signal is increasingly redundant, when the water affair control terminal receives data, when a repeated signal appears in the data signal for a period of time or the data signal is too much, the maximum limit of the control terminal for receiving the signal is exceeded, signal blocking can be caused, and further the analysis and judgment of the water affair control terminal on the data signal are influenced.

Disclosure of Invention

In view of the above situation, an object of the present invention is to provide a circuit for preventing blocking of water service signal transmission, which can enlarge the pulse width of the signal received by a water service control terminal, and delay the signal transmission, thereby preventing signal blocking.

The technical scheme for solving the problem is that the water service signal transmission anti-blocking circuit comprises an operational amplifier receiving circuit, a feedback calibration circuit and an amplitude limiting output circuit, wherein the operational amplifier receiving circuit receives signals demodulated by a water service control terminal, the feedback calibration circuit uses an operational amplifier AR2, an operational amplifier AR3 and a diode D3 to form a pulse width adjusting circuit to enlarge the signal pulse width, simultaneously uses a variable resistor RW1, a diode D4 and a diode D9 to form a rectifying circuit to rectify the signals and input the rectified signals into the same-phase input end of the operational amplifier AR4, uses a silicon controlled rectifier VTL1 and a voltage regulator D2 to form an abnormal signal detecting circuit to detect the output signal of the operational amplifier AR2, then uses a delay circuit consisting of a triode Q1 and a capacitor C4 to delay the signals and input the delayed signals into the same-phase input end of the operational amplifier AR4, wherein the triode Q3 detects the output signal of the delay circuit and the output signal of the operational amplifier AR2 to adjust the signal amplitude difference, and finally, the amplitude limiting output circuit forms an amplitude limiting circuit by using a diode D5-a diode D8 and an operational amplifier AR1 to carry out amplitude limiting-amplification-amplitude limiting regulation on the signal, and the amplitude limiting circuit is input into a data receiving port of the single chip microcomputer in the water service control terminal.

Due to the adoption of the technical scheme, compared with the prior art, the invention has the following advantages;

1, a pulse width adjusting circuit consisting of an operational amplifier AR2, an operational amplifier AR3 and a diode D3 is used for expanding the pulse width of a signal, a sawtooth wave voltage is formed at two ends of a capacitor C2 by the operational amplifier AR3 and the diode D3 and is directly applied to an inverting input end of the operational amplifier AR2 and is compared with a voltage at a non-inverting input end of the operational amplifier AR2, when the voltage at two ends of the capacitor C2 is higher than that at the non-inverting input end of the operational amplifier AR2, the operational amplifier AR2 outputs a low potential and outputs a high potential lower than that at the non-inverting input end of the operational amplifier AR2, namely, the upper half part of a sawtooth is cut off, so that the higher the voltage at the non-inverting input end of the operational amplifier AR2 is, the less sawtooth is cut off, the output pulse;

2. a rectifying circuit consisting of a variable resistor RW1, a diode D4 and a diode D9 is used for rectifying signals and inputting the rectified signals into the in-phase input end of an operational amplifier AR4, an abnormal signal detection circuit consisting of a controlled silicon VTL1 and a voltage regulator tube D2 is used for detecting output signals of the operational amplifier AR2, when signal blockage exceeds an expanded pulse width adjustment range, the controlled silicon VTL1 is conducted, then a delay circuit consisting of a triode Q1 and a capacitor C4 is used for delaying the signals and inputting the delayed signals into the in-phase input end of the operational amplifier AR4, the effect of delaying signal transmission is achieved, the effect of further preventing signal transmission blockage is achieved, the effect of expanding pulse width of the signals received by a water service control terminal is achieved, and the effect of preventing signal blockage is achieved.

Drawings

FIG. 1 is a circuit diagram of a feedback calibration circuit of an anti-blocking circuit for water service signal transmission according to the present invention.

FIG. 2 is a circuit diagram of the amplitude limiting output of the anti-blocking circuit for water service signal transmission according to the present invention.

Fig. 3 illustrates an operational amplifier receiving circuit diagram of a water service signal transmission anti-blocking circuit.

Detailed Description

The foregoing and other technical matters, features and effects of the present invention will be apparent from the following detailed description of the embodiments, which is to be read in connection with the accompanying drawings of fig. 1 to 3. The structural contents mentioned in the following embodiments are all referred to the attached drawings of the specification.

A water service signal transmission anti-blocking circuit comprises an operational amplifier receiving circuit, a feedback calibration circuit and an amplitude limiting output circuit, wherein the operational amplifier receiving circuit receives a signal demodulated by a water service control terminal, the feedback calibration circuit uses an operational amplifier AR2, an operational amplifier AR3 and a diode D3 to form a pulse width adjusting circuit to enlarge the signal pulse width, simultaneously uses a variable resistor RW1, a diode D4 and a diode D9 to form a rectifying circuit to rectify the signal and input the signal into an in-phase input end of the operational amplifier AR4, uses a silicon controlled rectifier VTL1 and a voltage stabilizing tube D2 to form an abnormal signal detection circuit to detect the output signal of an operational amplifier AR2, then uses a delay circuit consisting of a triode Q1 and a capacitor C4 to delay the signal and input the in-phase input end of the operational amplifier AR4, wherein the triode Q3 detects the output signal of the delay circuit and the potential difference of the output signal of the operational amplifier AR2 to adjust the signal amplitude of the, finally, the amplitude limiting output circuit uses a diode D5-a diode D8 and an operational amplifier AR1 to form an amplitude limiting circuit to carry out amplitude limiting-amplification-amplitude limiting regulation on signals, and the signals are input into a data receiving port of a single chip microcomputer in the water service control terminal;

the feedback calibration circuit uses an operational amplifier AR2, an operational amplifier AR3 and a diode D3 to form a pulse width adjusting circuit to enlarge the signal pulse width, uses an operational amplifier AR3 and a diode D3 to form sawtooth wave voltage at two ends of a capacitor C2, the sawtooth wave voltage is directly applied to the inverting input end of the operational amplifier AR2 and is compared with the voltage at the non-inverting input end of the operational amplifier AR2, when the voltage at two ends of the capacitor C2 is higher than that at the non-inverting input end of the operational amplifier AR2, the operational amplifier AR2 outputs low potential and high potential lower than that at the non-inverting input end of the operational amplifier AR2, which is equivalent to cutting off the upper half part of sawtooth, therefore, the higher the voltage at the non-inverting input end of the operational amplifier AR2 is, the less sawtooth is cut off, the output pulse width is wider, simultaneously uses a variable resistor RW1, a diode D4 and a diode D8 to form a rectifying circuit to rectify the signal and input the signal into the non-inverting input end of the operational amplifier AR 6, and uses a thyristor D2 to, when the signal blockage exceeds the expanded pulse width regulation range, the controllable silicon VTL1 is conducted, then a delay circuit consisting of a triode Q1 and a capacitor C4 is used for delaying the signal and inputting the delayed signal into the in-phase input end of the operational amplifier AR4, the effect of delaying signal transmission is realized, the effect of further preventing signal transmission blockage is realized, wherein the triode Q3 detects the output signal of the delay circuit and the output signal potential difference of the operational amplifier AR2, the signal amplitude of the in-phase input end of the operational amplifier AR3 is adjusted, and the effect of protecting the circuit is realized;

the feedback calibration circuit has the specific structure that the inverting input end of an operational amplifier AR2 is connected with one end of a resistor R3 and one end of a capacitor C2, the other end of a capacitor C2 is grounded, the other end of a resistor R3 is connected with one end of a resistor R4 and the inverting input end of an operational amplifier AR3, the other end of a resistor R4 is connected with one end of a resistor R5 and the anode of a diode D3, the other end of the resistor R3 is connected with +5V of a power supply, the inverting input end of the operational amplifier AR3 is connected with one end of a resistor R3, one end of the resistor R3 and the power supply +5V, the other end of the resistor R3 is grounded, the other end of the resistor R3 is connected with the output end of the operational amplifier AR3 and the cathode of the diode D3, the output end of the operational amplifier AR3 is connected with one end of the resistor R3 and the anode of a thyristor VTL 3, the cathode of the thyristor D3, the resistor R3 and the cathode of the capacitor C3, and the other end of the capacitor C3 and the resistor R36, the other end of the resistor R10 is connected to the base of the transistor Q1 and one end of the resistor R11, one end of the capacitor C4, the emitter of the transistor Q4 and the other end of the resistor R4 are connected to the +5V, the collector of the transistor Q4 is connected to the collector of the transistor Q4, the non-inverting input terminal of the operational amplifier AR4 and the contact 3 of the variable resistor RW 4, one end of the resistor R4, the other end of the resistor R4 is grounded, the other end of the resistor R4 is connected to the ground, the other end of the resistor R4 is connected to the base of the transistor Q4 and the anode of the diode D4, the cathode of the diode D4 and one end of the capacitor C4 and the capacitor C4, the cathode of the diode D4 is connected to the other end of the capacitor C4 and the contact 2 of the variable resistor R4, the contact 1 of the variable resistor R4 is connected to the anode of the diode D4 and the other end of the inverting input terminal of the resistor R4, the resistor R4 is connected to the ground. The other end of the resistor R15 is connected to the output terminal of the amplifier AR 4.

On the basis of the scheme, the amplitude limiting output circuit utilizes a diode D5-a diode D8 and an operational amplifier AR1 to form an amplitude limiting circuit to carry out amplitude limiting-amplifying-amplitude limiting adjustment on signals, the amplitude limiting depth is increased, the signals are finally input into a singlechip data receiving port in a water service control terminal, the cathode of the diode D5 is connected with the anode of a diode D6 and the output end of an operational amplifier AR4, the anode of a diode D5 is connected with the cathode of a diode D6 and one end of a resistor R16 and the non-inverting input end of an operational amplifier AR5, the inverting input end of the operational amplifier AR5 is connected with one end of a resistor R17, the other end of a resistor R17 is grounded, the output end of the operational amplifier AR5 is connected with the other end of a resistor R16 and the cathode of a diode D7 and the anode of a diode D8, and the anode of a diode D7 is connected with the cathode;

the operational amplifier receiving circuit receives signals demodulated by the water service control terminal, an operational amplifier AR1 is used for amplifying the signals in phase, one end of a resistor R1 is connected with the negative electrode of a voltage regulator tube D1 and a signal receiving port of the water service control terminal, the positive electrode of the voltage regulator tube D1 is grounded, the other end of a resistor R1 is connected with the non-inverting input end of an operational amplifier AR1 and one end of a resistor R2 and a capacitor C1, the capacitor C1 and the inverting input end of the operational amplifier AR1 are grounded, and the output end of the operational amplifier AR1 is connected with the other end of a resistor R2 and the non-inverting input end of the operational amplifier AR 2.

When the invention is used specifically, the water service signal transmission anti-blocking circuit comprises an operational amplifier receiving circuit, a feedback calibration circuit and a limiting output circuit, wherein the operational amplifier receiving circuit receives a signal demodulated by a water service control terminal, the feedback calibration circuit uses a pulse width adjusting circuit consisting of an operational amplifier AR2, an operational amplifier AR3 and a diode D3 to enlarge the signal pulse width, a sawtooth wave voltage is formed at two ends of a capacitor C2 by using an operational amplifier AR3 and a diode D3, the sawtooth wave voltage is directly applied to an inverting input end of the operational amplifier AR2 and is compared with the voltage at a non-inverting input end of the operational amplifier AR 6, when the voltages at two ends of the capacitor C2 are higher than the voltage at the non-inverting input end of the operational amplifier AR2, the operational amplifier AR2 outputs a low potential, and when the voltages are lower than the voltage at the non-inverting input end of the operational amplifier AR2, which is equivalent to cutting off the upper half part of a sawtooth, therefore, the non-blocking circuit has less sawtooth cutting off, the wider the output pulse width, the more the rectifier circuit composed of variable resistor RW1, diode D4 and diode D9 is used to rectify the signal and input it into the non-inverting input terminal of the operational amplifier AR4, and the abnormal signal detection circuit composed of thyristor VTL1 and stabilivolt D2 is used to detect the output signal of the operational amplifier AR2, when the signal blockage exceeds the expanded pulse width regulation range, the thyristor VTL1 is conducted, then the delay circuit composed of transistor Q1 and capacitor C4 is used to delay the signal and input it into the non-inverting input terminal of the operational amplifier AR4, so as to realize the function of delay transmission signal, and further prevent the signal transmission blockage, wherein the transistor Q3 is used to detect the output signal of the delay circuit and the output signal potential difference of the operational amplifier AR2, adjust the signal amplitude of the non-inverting input terminal of the operational amplifier AR3, playing the role of protection circuit, finally the output circuit is composed of diode D5-amplitude limiting diode D8 and amplitude limiting AR1 to limit the circuit to limit the amplitude-, and inputting the data receiving port of the singlechip in the water affair control terminal.

While the invention has been described in further detail with reference to specific embodiments thereof, it is not intended that the invention be limited to the specific embodiments thereof; for those skilled in the art to which the present invention pertains and related technologies, the extension, operation method and data replacement should fall within the protection scope of the present invention based on the technical solution of the present invention.