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Servo output load broken line detecting device and detecting method

A technology of disconnection detection and output load, applied in instruments, computer control, simulators, etc., can solve problems such as lack of detection devices

Pending Publication Date: 2019-05-03
SHANGHAI AUTOMATION INSTRAION CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The invention discloses a servo output load disconnection detection device and detection method, which are used to solve the problem of lack of a device for detecting the servo output load connection state used in steam turbine control in the prior art

Method used

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  • Servo output load broken line detecting device and detecting method
  • Servo output load broken line detecting device and detecting method

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Embodiment Construction

[0019] The present invention will be further described below in conjunction with accompanying drawing and embodiment:

[0020] figure 1 It is the circuit block diagram of the servo output load disconnection detection device of the present invention, please refer to figure 1 , a servo output load disconnection detection device, which includes: a positive terminal 11 and a negative terminal 12 of a servo output coil, and also includes a microprocessor 2, the microprocessor 2 has an input signal port, a feedback input port, and a microprocessor A control current output circuit and a detection circuit are respectively connected between the processor 2 and the positive terminal 11 and the negative terminal 12; the microprocessor 2 also has an alarm interface.

[0021] Further, the control current output circuit includes: a digital-to-analog conversion chip 3, an operational amplifier conditioning module 4, a high-current operational amplifier 5, and the input end of the digital-to...

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Abstract

The invention discloses a servo output load broken line detecting device. The device comprises the positive terminal and the negative terminal of a servo output coil and a microprocessor. The microprocessor has an input signal port and a feedback input port. A control current output circuit and a detection circuit are connected between the microprocessor and the positive terminal and between the microprocessor and the negative terminal. The microprocessor has an alarm interface. In the invention, a problem that a device used for detecting the wiring state of a servo output load used by steam turbine control lacks in the prior art is solved. The microprocessor is used to make a control circuit output a circuit output current, and then the detection circuit is used to detect. A simple and effective method is used to realize the broken line detection of the servo output coil, turn-off and alarm indications are given and output is performed.

Description

technical field [0001] The invention relates to a detection device, in particular to a servo output load disconnection detection device and detection method. Background technique [0002] In the steam turbine control system, the valve control is the key control point. According to the input of the valve opening command and the feedback of the valve position, the valve controller controls the opening and closing of the valve through the control signal output by the servo to complete the valve control of the steam turbine. Therefore, detecting the wiring status of the servo output load is the key to monitoring the normal operation of the valve control system. [0003] The control signal output from the servo to the load coil, according to the common output mode, one is a current signal of -50mA~50mA, and the other is a voltage signal of -10V~10V. The disconnection detection technology here refers to the disconnection detection technology applied to current signals of -50mA t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B19/042
Inventor 赵惠洁史哲烽杨烨陈小华姜铁梅
Owner SHANGHAI AUTOMATION INSTRAION CO LTD
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