基于两线制的终端状态检测系统及设备
By using a two-wire-based terminal status detection system, the circuit structure of remote microphone equipment is simplified, solving the problems of increased construction difficulty due to multi-wire cabling and increased material costs due to Ethernet conversion, thus achieving the effects of simplified construction and reduced costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GERUITONG ELECTRONICS (SHENZHEN) CO LTD
- Filing Date
- 2025-07-28
- Publication Date
- 2026-07-17
AI Technical Summary
Existing remote microphone equipment requires multi-wire cabling to transmit voice and status signals, which increases construction difficulty and cost, while Ethernet conversion increases material costs.
A two-wire-based terminal status detection system is adopted, which includes input voltage, conversion circuit, step-down circuit, amplification circuit and detection circuit. The terminal load status is determined by the voltage value of the detection port, which simplifies the circuit structure and reduces material costs.
It enables the transmission of audio signals while simplifying the construction process, reducing engineering and material costs, and facilitating the detection of microphone access and button status.
Smart Images
Figure CN224521173U_ABST
Abstract
Claims
1. A terminal state detection system based on two-wire system, comprising an input voltage, and a conversion circuit connected with the input voltage, a voltage reduction circuit connected with the conversion circuit, characterized in that: It also includes an amplifier circuit connected to the input step-down circuit and a detection circuit connected to the amplifier circuit. The step-down circuit reduces the input voltage and supplies power to the amplifier circuit and the detection circuit. The detection system also includes a terminal interface circuit. The terminal interface circuit is connected to a load and is electrically connected to the step-down circuit, the amplifier circuit and the detection circuit. The step-down circuit supplies power to the load connected to the terminal interface circuit. The conversion circuit, the step-down circuit, the amplifier circuit and the detection circuit are also connected to a detection port. The connection status of the terminal load is detected by the voltage value of the detection port.
2. The detection system of claim 1, wherein: The step-down circuit includes a bias voltage module connected to the conversion circuit and a current detection module connected to the bias voltage module. The current detection module is connected to a voltage regulator module, which is connected to a terminal interface circuit and an amplifier circuit.
3. The detection system of claim 2, wherein: The current detection module includes a first transistor, the bias voltage module includes a first resistor and a fourth resistor, the first resistor is connected to the conversion circuit and the emitter of the first transistor, the fourth resistor is connected to the base and collector of the first transistor, the voltage regulation module includes a first diode, a third capacitor connected in parallel with the first diode, and a sixteenth capacitor connected in parallel with the first diode, the anode of the first diode is grounded to GND, and the cathode is connected to the first transistor.
4. The detection system of claim 1, wherein: The amplification circuit includes a first voltage divider module connected to the step-down circuit, and an amplification module connected to the first voltage divider module. The amplification module is connected to a clamping protection module and a filtering module, and the filtering module is connected to the terminal interface circuit.
5. The detection system of claim 4, wherein: The amplification module includes a first operational amplifier. The first voltage divider module includes a third resistor connecting the first operational amplifier and the step-down circuit, a ninth resistor connected in series with the third resistor, and a seventh capacitor connected in parallel with the ninth resistor. The ninth resistor is grounded to GND. The filtering module includes a fifth resistor and an eighth capacitor connected to the fifth resistor. The fifth resistor is connected to the terminal interface circuit. The eighth capacitor is grounded to GND. The clamping protection module includes a fourth diode and a fifteenth capacitor, as well as a twelfth capacitor and a third diode.
6. The detection system of claim 1, wherein: The detection circuit includes a detection module and a second voltage divider module connected to the detection module. The detection module is connected to the detection port and is connected to the terminal interface circuit through the second voltage divider module.
7. The detection system of claim 6, wherein: The detection module includes a fourth transistor and a fifth transistor. The base of the fourth transistor is connected to the collector of the fifth transistor. The second voltage divider module includes a fourteenth resistor connected to the base of the fifth transistor and a fifteenth resistor connected to the base of the fifth transistor. The fifteenth resistor is connected to the terminal interface circuit through a fifth diode.
8. The detection system according to claim 1, characterized in that: The conversion circuit includes a twelfth resistor, one end of which is connected to the input voltage and the other end is connected to the detection port. The terminal interface circuit adopts the RJ45 interface wiring sequence and has a total of 8 interfaces.
9. The detection system of claim 8, wherein: Pin 6 of the RJ45 interface is connected to the amplifier circuit for voice output, pin 5 is for pin detection and grounding, and pin 4 is connected to the detection circuit to detect the terminal switch status.
10. A terminal state detection device based on a two-wire system, characterized by: A terminal state detection system based on two-wire system comprising a terminal state detection system based on two-wire system as claimed in any of claims 1-9.