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A signal acquisition method, device and system

A signal acquisition and signal technology, which is applied in the direction of program control and electrical program control in the sequence/logic controller, can solve the problems of missing signal acquisition, unable to correctly record the current state of the sensor, and unable to collect the effective signal state of the sensor, etc., to achieve Avoid missing effects

Active Publication Date: 2019-04-19
重庆川仪软件有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in the actual application process, since the platform control room and the door controllers use the RS485 communication mode, the existing RS485 communication mode determines that the platform control room can only poll 24 door controllers (that is, every pre-set Set the time to query a door controller, and restart a new query cycle after querying all door controllers), if a certain sensor of a certain door controller jumps from an invalid state to a valid state within two query Between frames, the platform control room cannot collect the effective signal status of the sensor, resulting in the platform control room being unable to correctly record the current status of the platform door to which the sensor belongs, resulting in omission of signal collection

Method used

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  • A signal acquisition method, device and system
  • A signal acquisition method, device and system
  • A signal acquisition method, device and system

Examples

Experimental program
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Embodiment 1

[0031] In this embodiment, a signal acquisition method is shown, using an AND gate controller.

[0032] See figure 1 , which shows a flow chart of the signal acquisition method provided by the present application, which may include the following steps:

[0033] Step S11: When it is detected that the signal to be detected has changed from an invalid state to a valid state, generate a virtual network signal corresponding to the signal to be detected.

[0034] In this embodiment, the invalid state and valid state of the signal to be checked are defined by the door controller, such as: the infrared sensor is used to detect whether there is an obstacle intruding into the dangerous area by mistake, and the "blocked" definition of the infrared sensor In the valid state, the infrared sensor returns to the "unblocked" state after the obstacle leaves, and "unblocked" defines the invalid state. In the present invention, all valid states are represented by "1", and all invalid states ar...

Embodiment 2

[0046] In this example, in figure 1 On the basis of the signal acquisition method shown, another signal acquisition method is extended, please refer to figure 2 , can include the following steps:

[0047] Step S21: When it is detected that the signal to be detected has changed from an invalid state to a valid state, generate a virtual network signal corresponding to the signal to be detected.

[0048] Step S22: Mark the state of the virtual network signal as a valid state.

[0049] Step S23: storing the virtual network signal and the state of the virtual network signal.

[0050] Step S24: When receiving the signal state acquisition command from the host computer, send the virtual network signal and the state of the virtual network signal to the host computer, so that the host computer can correctly record the signal to be detected state.

[0051] Step S21 to step S24 are the same as step S11 to step S14 shown in the first embodiment, and will not be repeated here.

[0052]...

Embodiment 3

[0055] Corresponding to the signal collection method shown in Embodiment 1, this embodiment shows a signal collection device, please refer to image 3 , The signal collection device includes: a generation unit 31 , a marking unit 32 , a storage unit 33 and a sending unit 34 .

[0056] The generating unit 31 is configured to generate a virtual network signal corresponding to the signal to be detected when it is detected that the signal to be detected has jumped from an invalid state to a valid state.

[0057] The marking unit 32 is configured to mark the state of the virtual network signal as a valid state.

[0058] The storage unit 33 is configured to store the virtual network signal and the state of the virtual network signal.

[0059] The sending unit 34 is configured to send the virtual network signal and the state of the virtual network signal to the host computer when receiving a signal state acquisition command from the host computer, so that the host computer can corre...

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Abstract

The invention provides a signal acquisition method, an apparatus and a system thereof. The signal acquisition method is applied to a door controller. The method comprises the following steps of when a signal to be detected is detected to be changed into an effective state from an invalid state, generating a virtual network signal corresponding to the signal to be detected and marking the state of the virtual network signal as the effective state; storing the virtual network signal and the state of the virtual network signal; when a signal state acquisition command of an upper computer is received, sending the virtual network signal and the state of the virtual network signal to the upper computer so that the upper computer correctly records the state of the signal to be detected. In the invention, when the signal state acquisition command of the upper computer is received, the signal to be detected is changed into the invalid state from the effective state; the upper computer still can collect the effective state of the signal to be detected so that the upper computer can correctly records the state of the signal to be detected and correctly records a current state of a corresponding platform door, and omission of signal acquisition is avoided.

Description

technical field [0001] The present application relates to the technical field of automatic control, in particular to a signal acquisition method, device and system. Background technique [0002] At present, the platform doors of light rail and subway stations are mainly opened and closed by door controllers. About 24 door controllers will be placed on each platform to control the opening and closing of each platform door. [0003] In the platform door control system, in order to detect the real-time status of each component of the platform door, various sensors are installed on the platform door. The real-time signal of the sensor is collected by the door controller in real time to judge the current state of the platform door and make correct actions accordingly. And the effective signal status of these sensors also needs to be transmitted to the platform control room through the field bus for recording and real-time display. [0004] However, in the actual application pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B19/04
CPCG05B19/04
Inventor 马乾
Owner 重庆川仪软件有限公司