A method for closed-loop detection of working condition of capacitive touch screen

Abstract

The present invention discloses a method for closed-loop detection of the working condition of a capacitive touch screen for an elevator, comprising the following steps: step 1, setting a test antenna, and providing a test antenna on a touch display screen; step 2, sending a detection signal, and the touch screen control panel sends the detection signal to the test antenna through a test signal generator; step 3, receiving and feeding back the detection signal, and the test antenna receives the detection signal, and then triggers the detection action of the touch screen, and feeds back to the touch screen control panel. In this invention, the touch screen control panel can close the signal loop of the touch screen, and through the signal loop, our touch device can judge the working condition of the touch screen. If an abnormality occurs, the user can be reminded to take appropriate actions by restarting the device and displaying corresponding information. This measure is very necessary to ensure the stable operation of equipment such as the elevator touch screen that needs to be used all year round.

Description

Technical Field

[0001] The invention relates to the technical field of elevators, and in particular to a method for closed-loop detection of the working condition of a capacitive touch screen. Background Art

[0002] Capacitive touch screens are increasingly used in the elevator industry, but the touch screen itself is a relatively sophisticated device that has very high requirements for the use environment. However, elevators are public transportation tools, and the use environment varies significantly and is greatly affected by the surrounding environment. This poses a great challenge to the stable operation of the touch screen. Specifically, the judgment parameter offset of the touch screen is very large, causing the touch screen driver to fail to work, which in turn makes the elevator operation ineffective.

[0003] Therefore, a closed-loop method for detecting the working condition of the capacitive touch screen is designed. Summary of the invention

[0004] In order to overcome the above-mentioned shortcomings, the present invention provides a method for closed-loop detection of the working condition of a capacitive touch screen.

[0005] The present invention achieves the above-mentioned purpose through the following technical solutions:

[0006] A method for closed-loop detection of the working condition of a capacitive touch screen for an elevator comprises the following steps:

[0007] Step 1: Setting a test antenna: a test antenna is set on the touch display screen;

[0008] Step 2: Send a detection signal. The touch screen control panel sends a detection signal to the test antenna through a test signal generator;

[0009] Step 3: receiving and feeding back the detection signal, the test antenna receives the detection signal, then triggers the detection action of the touch screen, and feeds back to the touch screen control board;

[0010] By comparing the detection signal sent by the touch screen control board with the signal received from the touch screen, it is possible to determine whether the entire circuit is working normally. If any problem occurs in the circuit, intervention can be carried out by adjusting the touch screen parameters and restarting and resetting.

[0011] The touch screen control board generates a 0V / 5V alternating electric field on the test antenna through the test signal generator. The electric field will form a trigger signal on the touch screen. The touch screen driver board outputs the corresponding position coordinates to the touch screen control board. The touch screen control board has built-in trigger position comparison data. After internal comparison, it is confirmed that it is the position that triggered itself, and then it can be determined whether the entire signal path of the touch screen is normal.

[0012] The test antenna is located at the upper right or upper left of the touch screen. The test antenna is a transparent rectangular conductive film with an area of ​​not less than 2 square centimeters. The impedance of the test antenna is between 50 and 75 ohms.

[0013] The detection signal is divided into two types: 5V AC and 0V ground level.

[0014] Preferably, the touch screen control board is electrically connected to the touch screen via a touch screen driving board.

[0015] The beneficial effects of the present invention are: the closed-loop detection method of the working condition of the capacitive touch screen, the touch screen control board can close the loop test the signal circuit of the touch screen, through which our touch device can judge the working condition of the touch screen, and if an abnormality occurs, the device can be restarted and the corresponding information can be displayed to remind the user to take appropriate actions. This measure is very necessary to ensure the stable operation of equipment such as elevator touch screens that need to be used all year round. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will now be described by way of example with reference to the accompanying drawings, in which:

[0017] Figure 1 It is a schematic diagram of the structure and signal flow of the present invention. DETAILED DESCRIPTION

[0018] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0019] like Figure 1 , a closed-loop method for detecting the working condition of a capacitive touch screen for an elevator, comprising the following steps:

[0020] Step 1: Setting a test antenna: a test antenna is set on the touch display screen;

[0021] Step 2: Send a detection signal. The touch screen control panel sends a detection signal to the test antenna through a test signal generator;

[0022] Step 3: receiving and feeding back the detection signal, the test antenna receives the detection signal, then triggers the detection action of the touch screen, and feeds back to the touch screen control board;

[0023] By comparing the detection signal sent by the touch screen control board with the signal received from the touch screen, it is possible to determine whether the entire circuit is working normally. If any problem occurs in the circuit, intervention can be carried out by adjusting the touch screen parameters and restarting and resetting.

[0024] The working principle of the closed-loop detection method of the working condition of the capacitive touch screen for elevators is that when assembling the touch screen assembly for the elevator, a piece of transparent conductive material is pasted on the unused area of ​​the touch screen as an additional touch event test antenna, and the working state of the test antenna is controlled by the internal circuit of the touch screen control board. In the non-working state, the high impedance state is maintained, and the corresponding area of ​​the touch screen will not generate a touch signal. In the working state, the 0V level and the 5V AC level are maintained. The level signal will cause the touch screen to generate a signal and feedback the corresponding position data. The position data is compared with the previously preset data. The internal control circuit will determine whether the touch screen loop is working properly.

[0025] Through this method, we can timely and accurately confirm the working status of the elevator touch screen to remind users to take targeted measures and promptly notify elevator maintenance personnel to perform maintenance.

[0026] This is equivalent to the touch screen control panel being able to close the signal circuit of the touch screen. Through this signal circuit, our touch device can determine the working status of the touch screen. If an abnormality occurs, the device can be restarted and the corresponding information can be displayed to remind the user to take appropriate actions. This measure is very necessary to ensure the stable operation of equipment such as elevator touch screens that need to work all year round;

[0027] The touch screen control board generates a 0V / 5V alternating electric field on the test antenna through the test signal generator. The electric field will form a trigger signal on the touch screen. The touch screen driver board outputs the corresponding position coordinates to the touch screen control board. The touch screen control board has built-in trigger position comparison data. After internal comparison, it is confirmed that it is the position that triggered itself, and then it can be determined whether the entire signal path of the touch screen is normal.

[0028] The test antenna is located at the upper right or upper left of the touch screen. The test antenna is a transparent rectangular conductive film with an area of ​​not less than 2 square centimeters. The impedance of the test antenna is between 50 and 75 ohms. The detection signal is divided into two signals: 5V AC and 0V ground level.

[0029] Specifically, the touch screen control board is electrically connected to the touch screen through a touch screen driving board.

[0030] The above is based on the present invention as an inspiration. Through the above description, relevant staff can make various changes and modifications without departing from the technical idea of ​​this invention. The technical scope of this invention is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A closed-loop method for detecting the working condition of a capacitive touch screen, characterized in that: The following steps are involved: Step 1: Setting a test antenna: a test antenna is set on the touch display screen; Step 2: Send a detection signal. The touch screen control panel sends a detection signal to the test antenna through a test signal generator; Step 3: receiving and feeding back the detection signal, the test antenna receives the detection signal, then triggers the detection action of the touch screen, and feeds back to the touch screen control board; Among them, by comparing the detection signal sent by the touch screen control board and the signal received from the touch screen, it can be determined whether the entire circuit is working normally. If any problem occurs in the circuit, intervention can be carried out by adjusting the touch screen parameters and restarting the reset operation; The touch screen control board generates a 0V / 5V alternating electric field on the test antenna through a test signal generator, and the electric field forms a trigger signal on the touch screen. The touch screen driver board outputs the corresponding position coordinates to the touch screen control board. The touch screen control board has built-in trigger position comparison data. After internal comparison, it is confirmed that it is the position that triggers itself, and then it can be judged whether the entire signal path of the touch screen is normal; The test antenna is located at the upper right or upper left of the touch display screen. The test antenna is a transparent rectangular conductive film with an area of ​​not less than 2 square centimeters. The impedance of the test antenna is between 50 and 75 ohms. The detection signal is divided into two types of signals: 5V alternating current and 0V ground level.

2. The closed-loop method for detecting the working condition of a capacitive touch screen according to claim 1, characterized in that: The touch screen control board is electrically connected to the touch screen through the touch screen driving board.

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