Empty-head notch detector circuit

Abstract

The invention relates to an empty-head notch detector circuit, belonging to the field of detecting technique. The empty-head notch detector circuit comprises a liquid crystal (LC) oscillating circuit, a crystal oscillating circuit, an operation amplification signal superimposed gain amplification circuit and a power module circuit, and is characterized in that the LC oscillating circuit consists of a triode BG3 and a triode BG2, wherein a accessory circuit of the BG3 consists of a resistor R9, a resistor R10, a resistor R11 and a resistor R12 as well as a capacitor C11 and a capacitor C12; a feedback signal subcircuit of the BG2 consists of resistors R6, R7, R8, C9, L1, L2 and Cx; the crystal oscillating circuit consists of a triode BG1, a resistor R1, a resistor R2 and a resistor R3, a capacitor C1, a capacitor C2, a capacitor C3 and a capacitor C8 as well as a crystal oscillator; the operation amplification signal superimposed gain amplification circuit is a subtractor circuit formed by an operation amplifier 741, and a resistor R14, a resistor R15, a resistor R18, a resistor R20 and a resistor RW2; and the power module circuit consists of a resistor R13, a resistor R16, a capacitor C4, a capacitor C7 and a voltage-regulator tube BW1. The empty-head notch detector circuit is reasonable in the circuit principle and design, ingenious in conception, high in detection speed, andhigh in sensitivity and detection accuracy.

Description

technical field [0001] The invention relates to the technical field of detection, in particular to a short-end and mouth-missing detector circuit used in an automatic cigarette rolling production line to quickly detect empty ends (short tobacco shreds) and missing filter tips. Background technique [0002] At present, the domestic tobacco industry has higher and higher requirements on the degree of automation. Most of the devices used to detect the empty end of cigarettes on the production line use photoelectric detectors, proximity switches, etc., but there are often problems with low detection speed, sensitivity and detection accuracy in the work. defect. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a short and short mouth detector circuit with ingenious design, fast detection speed, high sensitivity and detection accuracy. [0004] The technical problem to be solved by the present invention adopts the foll...

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Problems solved by technology

[0002] At present, the domestic tobacco industry has higher and higher requirements for automation. Most of the devices used to detect the empty end of cigarettes on the production line use photoelectric detectors, proximity switches, etc., but there are often problems with low detection speed, sensitivity and detection accuracy in the work. defect

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