Method for testing touch sensitivity of touch screen and application of method in POS (Point Of Sale) machine test

Abstract

The invention discloses a method for testing the touch sensitivity of a touch screen and application of the method in POS (Point Of Sale) machine testing. According to the scheme, the problems that the work of verifying and testing the touch sensitivity of the screen by relying on manpower in the research, development and production of touch screen products is complicated and is difficult to quantify can be solved. According to the scheme, quantitative test results can be given for indexes such as sensitivity of the capacitive touch screen of a product, the pressure test problem that the capacitive touch screen of the product needs to be subjected to long-term touch screen test by human fingers in the research and development process of the product can be solved, existing hardware is ingeniously utilized, a software mechanism is combined with a test method, and the test efficiency is improved. The invention discloses a capacitive touch screen performance testing device, and aims to help to objectively and quantitatively test and measure key performance indexes of capacitive touch screens selected by products in the POS research and development process, measure and compare technical differences and performance differences of different capacitive touch screens of different manufacturers, and provide a model selection basis for production research and development.

Description

Technical Field

[0001] The present invention relates to the technical field of POS machine screen touch control testing, and in particular to a touch screen touch control sensitivity testing method and an application thereof in POS machine testing. Background Art

[0002] The screen of smart POS is the same as that of smart phones. Capacitive touch screens are generally used as display and input components to achieve human-computer interaction. Therefore, the performance of capacitive touch screens will directly affect the user experience of smart POS. For example, if the touch screen of smart POS products is not sensitive, has skipping points, or cannot be touched during use, it will seriously affect the user experience of the product, lead to a decline in product performance indicators, and even cause product quality problems. Therefore, the selection, testing, and production of capacitive touch screens are very important tasks for smart POS in the R&D and production stages.

[0003] During the research and development process, for the selection test and debugging parameter setting of capacitive touch screens, it is usually necessary for R&D personnel to manually debug and verify the capacitive touch screens. They often use actual fingers to touch, observe the effects, verify the indicators, and manually verify during the work process. The verification results can only be subjective evaluations, and objective and quantitative test verification cannot be achieved. Especially for situations that require fast and continuous touch, ordinary people's fingers cannot achieve millisecond-level continuous touch of capacitive touch screens. In addition, during the product testing process, for the main indicators of capacitive touch screens such as pressure tests on sensitivity, if they are tested by ordinary people's fingers, the long-term and speed of the test will not be guaranteed, and the test results cannot be quantified (the speed of human fingers touching the screen cannot achieve a stable touch screen interval time). Although industrial manipulators can be used to replace human hands for touch, the movement speed of existing industrial manipulators often cannot reach the millisecond-level click speed.

[0004] Therefore, how to improve the reliability and efficiency of touch testing of the touch screen of smart POS machines is a research topic with very positive and practical significance for the production of POS machines. Summary of the invention

[0005] In view of this, the purpose of the present invention is to propose a touch screen touch sensitivity testing method which is reliable in implementation, flexible in operation, high in testing efficiency and has strong reference value for testing results, and its application in POS machine testing.

[0006] In order to achieve the above technical objectives, the technical solution adopted by the present invention is:

[0007] A touch screen touch sensitivity test method is applied to the touch screen of a POS machine, wherein the touch screen is a capacitive touch screen, and comprises:

[0008] Deploy the test control software on the POS machine, and provide the SDK interface to the test control software so that it can obtain the touch information collected by the touch screen of the POS machine when it is touched and clicked;

[0009] Place the touch screen clicker head of the screen clicker on the touch screen of the POS machine so that it corresponds to the preset test points on the touch screen one by one;

[0010] Connect the screen clicker to the POS machine, and control the screen clicker to work by the test control software;

[0011] The test control software sends preset control instructions to the control screen clicker, so that the touch screen click head of the screen clicker clicks the touch screen of the POS machine, and then obtains the touch information collected by the touch screen of the POS machine.

[0012] As a possible implementation mode, further, the preset control instruction described in this solution includes one or more of the number of clicks of the touch screen click head, the interval between the clicks, and the contact maintenance time of a single click.

[0013] As a preferred implementation option, preferably, the touch information described in this solution includes one or more of the coordinates of the location where the touch screen is touched, the time point when the click occurs, and the duration of the click.

[0014] As a preferred implementation option, preferably, the screen clicker described in this solution has more than one touch screen clicking head.

[0015] As a preferred implementation option, preferably, when the touch screen click head of this solution is placed on the touch screen of the POS machine, the position coordinates of the touch area on the corresponding touch screen are also recorded.

[0016] As a preferred implementation option, preferably, the screen clicker described in this solution establishes a communication connection with the POS machine via a USB cable.

[0017] Based on the above, the present solution also provides a POS machine screen touch control test method, which is applied with the above-mentioned touch screen touch control sensitivity test method.

[0018] As a preferred implementation option, preferably, the screen clicker described in this solution is also connected to the PC for communication, and the operation of the screen clicker is controlled by the test control software deployed on the PC.

[0019] This solution can be applied to the smart POS based on Android. The touch screen clicking tooling device (screen clicker) is connected through the USB2.0 interface of the smart POS itself, that is, a communication connection based on USB2.0 CDC can be established between the smart POS and the touch screen clicking tooling device, and its communication rate can reach 480Mbps (megabits per second). The test software (test application APP) is deployed on the smart POS. The test application APP on the smart POS sends control commands to the screen clicker through the established communication link. The embedded software built into the screen clicker parses the commands sent by the POS end, and can simultaneously or separately control the time and frequency of the conductive cloth contacts on each contact of the touch screen clicking tooling device touching and not touching the capacitive touch screen, that is, it can completely simulate the clicking operation of human fingers and the capacitive touch screen (including multi-touch). At the same time, the test application APP on the smart POS can also obtain the time and frequency of the capacitive touch screen being clicked through the SDK interface provided by the smart POS operating system. That is, the test application APP can control the click action of the conductive cloth contact point, and obtain the response of the click action on the capacitive touch screen, thereby forming a closed loop of control and response. By controlling different click frequencies and obtaining the touch screen response, the sensitivity index of the tested capacitive touch screen can be obtained, thereby forming objective measurement data. This solution does not rely on the click operation of an external industrial robot arm or human hand, nor does it rely on other precise and expensive special measuring equipment (such as measuring the waveform data on the capacitive touch screen chip), and there is no need to disassemble the smart POS machine for testing. The sensitivity index of the capacitive touch screen used on the smart POS can be objectively measured and tested.

[0020] By adopting the above-mentioned technical scheme, the present invention has the following beneficial effects compared with the prior art: the present scheme can solve the problem that the work of verifying and testing the touch sensitivity of the screen is complicated and difficult to quantify in the development and production of touch screen products, which requires manpower. The present scheme can give quantitative test results for indicators such as the sensitivity of the product's capacitive touch screen, and can also solve the problem of pressure testing of the product's capacitive touch screen that requires long-term touch screen testing by human fingers during product development. The present scheme cleverly utilizes existing hardware and combines testing methods through software mechanisms, aiming to help in the process of POS development, objectively and quantitatively test and measure the key performance indicators of the capacitive touch screen selected for the product, measure and compare the technical differences and performance differences of different capacitive touch screens from different manufacturers, and provide a selection basis for production development. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 This is a brief illustration of the test method of this solution, in which the screen clicker is connected to the POS machine for communication, and its touch screen click head is placed on the touch screen of the POS machine, wherein the reference numerals refer to: 1. screen clicker; 2. touch screen click head; 3. touch screen of the POS machine; 4. USB cable;

[0023] Figure 2 This is a brief schematic diagram of the touch control principle of the touch screen click head of the screen clicker of this solution;

[0024] Figure 3 This is a brief diagram of the connection between the screen clicker and the PC and POS in this solution. DETAILED DESCRIPTION

[0025] The present invention will be further described in detail below in conjunction with the accompanying drawings and examples. It is particularly noted that the following examples are only used to illustrate the present invention, but are not intended to limit the scope of the present invention. Similarly, the following examples are only partial embodiments of the present invention rather than all embodiments, and all other embodiments obtained by those of ordinary skill in the art without creative work are within the scope of protection of the present invention.

[0026] This embodiment provides a touch screen touch sensitivity test method, which is applied to a touch screen of a POS machine, wherein the touch screen is a capacitive touch screen, and includes:

[0027] S01. Deploy test control software on the POS machine, and provide an SDK interface to the test control software so that it can obtain touch information collected by touching and clicking the touch screen of the POS machine;

[0028] S02, placing the touch screen click head of the screen clicker on the touch screen of the POS machine so that it corresponds one by one with the preset test points on the touch screen; wherein the number of the touch screen click heads of the screen clicker in this solution is more than one (reference Figure 1 shown);

[0029] S03, connecting the screen clicker to the POS machine for communication, and controlling the screen clicker to work by the test control software;

[0030] S04. The test control software sends a preset control instruction to the control screen clicker, so that the touch screen click head of the screen clicker clicks the touch screen of the POS machine, and then obtains the touch information collected by the touch screen of the POS machine.

[0031] Among them, the screen clicker used in the test of this scheme is a commercially available product, and its touch screen click head can realize touch action by using the principle of combining a coil with a movable magnetic rod and a conductive cloth (such as Figure 2 As shown), this solution is mainly used in the touch screen sensitivity test of the POS machine, and will not be described in detail here.

[0032] In addition, the preset control instructions described in this solution include one or more of the number of clicks of the touch screen click head, the interval between clicks, and the contact maintenance time of a single click.

[0033] In terms of data recording, as a preferred implementation option, preferably, the touch information described in this solution includes at least one of the coordinates of the position of the touch screen being touched, the time point of the click, and the duration of the click. When the touch screen click head of this solution is placed on the touch screen of the POS machine, the coordinates of the touch area on the corresponding touch screen are also recorded.

[0034] In terms of data connection, preferably, the screen clicker described in this solution establishes a communication connection with the POS machine via a USB cable.

[0035] Based on the above, the present solution also provides a POS machine screen touch control test method, which is applied with the above-mentioned touch screen touch control sensitivity test method.

[0036] Among them, combined Figure 3 As shown, in order to improve the convenience and flexibility of data processing and test control, as a better implementation option, preferably, the screen clicker described in this scheme is also communicated with the PC, and the test control software deployed on the PC controls the operation of the screen clicker.

[0037] As an example of an operation, it includes the following:

[0038] The invention discloses an automatic test method for the screen sensitivity of a POS machine, comprising a physical hardware device (screen clicker), embedded software of the device, and control driving software and test method software on an intelligent POS (or PC).

[0039] The smart POS runs the test APP (test control software) deployed on it. The main function of the APP is to control the click and leave of the touch screen click head contact separately or simultaneously according to the set parameters, and obtain the touch screen response event on the touch screen through the operating system and SDK of the smart POS. The APP measures whether there is a point loss in the capacitive touch screen response by counting the number of clicks and responses set. By controlling different click frequencies (for example, click once every 30 milliseconds, and the click contact time is 10 milliseconds), the response sensitivity of the tested capacitive touch screen can be tested. The touch screen click head of the screen clicker is assisted by stickers or other methods to be installed at the three circles of the touch screen of the POS machine. The coordinates of the screen circle are set by the test APP, so the coordinates are known. The POS end can judge whether the response point has deviated from the position of the circle according to the value of the response coordinate. Generally, if the response point has deviated from the seat position of the circle, it can be judged as a touch screen jump point (this is an abnormal problem). Through this solution, it is possible to perform the test operation without the operator's fingers, and ordinary people's fingers quickly perform the click action, that is, it is impossible to manually test the minimum response event of the tested capacitive touch screen.

[0040] The physical device part of this solution is the screen clicker device, which consists of a touch screen click head and a control box. Its main function is to control the power on and off of the coil in the touch screen click head. When the coil is powered on, due to the principle of magnetic induction, the small magnetic bar in the coil is sucked down, so that the conductive cloth at the end of the small magnetic bar contacts the screen of the capacitive touch screen (see Figure 2 ), through reasonable design, the conductive cloth can form a coupling capacitor on the screen just like human fingers, which can completely simulate the contact of human fingers. The control box is based on an MCU with USB2.0 as the core. The MCU runs embedded software, communicates with the smart POS through USB2.0, and controls the on and off of the coil current of the touch screen click head.

[0041] In this scheme, the screen clicker can communicate with the smart POS or other host computers. Due to the use of USB2.0 link, the communication rate can reach 480Mbps (megabits per second). In this scheme, the time overhead of communication can be ignored. By designing a reasonable instruction set and software, the touch screen clicking action of the screen clicker controlled by the smart POS can be realized, and the clicking time and interval of the touch screen clicking head are completely specified by the smart POS (the time parameters set by the instruction set transmission).

[0042] Through the above-mentioned physical device, control software and test method software, it is possible to control and measure the test time (execution time of the touch screen click head) without relying on other third-party measurement tools and without disassembling or wiring the smart POS under test, thereby realizing automated testing and obtaining quantitative test results.

[0043] The unit cost of the device used in this method is extremely low, at the level of hundreds of yuan. Compared with other test solutions, it not only does not rely on the accuracy of external test equipment, but can also test the sensitivity performance data of the capacitive touch screen used on the tested smart POS from an objective perspective. Compared with other external dedicated test and measurement equipment, this solution does not require calibration and disassembly or wiring testing of the POS, and the test deployment is extremely convenient. This solution can be used not only in the R&D stage, but also in testing after the product leaves the factory, without the need for invasive testing and measurement of the product's touch screen.

[0044] The above descriptions are only some embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Any equivalent device or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A touch screen touch sensitivity test method, applied to the touch screen of a POS machine, wherein the touch screen is a capacitive touch screen, characterized in that: It includes: Deploy the test control software on the POS machine, and provide the SDK interface to the test control software so that it can obtain the touch information collected by the touch screen of the POS machine when it is touched and clicked; Place the touch screen clicker head of the screen clicker on the touch screen of the POS machine so that it corresponds to the preset test points on the touch screen one by one; Connect the screen clicker to the POS machine, and control the screen clicker to work by the test control software; The test control software sends preset control instructions to the control screen clicker, so that the touch screen click head of the screen clicker clicks the touch screen of the POS machine, and then obtains the touch information collected by the touch screen of the POS machine.

2. A touch screen touch sensitivity testing method as claimed in claim 1, characterized in that: The preset control instruction includes at least one of the number of clicks of the touch screen click head, the interval between clicks, and the contact holding time of a single click.

3. A touch screen touch sensitivity testing method as claimed in claim 1 or 2, characterized in that: The touch information includes at least one of the coordinates of the position where the touch screen is touched, the time point when the click occurs, and the duration of the click.

4. A touch screen touch sensitivity testing method as claimed in claim 3, characterized in that: The number of the touch screen clicking heads of the screen clicker is more than one.

5. A touch screen touch sensitivity testing method as claimed in claim 4, characterized in that: When the touch screen click head is placed on the touch screen of the POS machine, the position coordinates of the touch area on the corresponding touch screen are also recorded.

6. A touch screen touch sensitivity testing method as claimed in claim 5, characterized in that: The screen clicker establishes a communication connection with the POS machine via a USB cable.

7. A POS machine screen touch test method, characterized in that: The invention is applied to a touch screen touch sensitivity testing method as claimed in any one of claims 1 to 6.

8. A POS machine screen touch test method as claimed in claim 7, characterized in that: The screen clicker is also connected to the PC for communication, and the operation of the screen clicker is controlled by the test control software deployed on the PC.

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