Medical financial payment information mismatching intelligent identification system

Abstract

The invention relates to a medical financial payment information mismatching intelligent identification system, and the system comprises a data storage mechanism which is used for storing the standard contour shape of each authorized human body corresponding to each medical payment card number, and each medical payment card number is used by the corresponding authorized human body when a medical financial payment mechanism carries out payment; and the real-time alarm mechanism is arranged in the medical financial payment mechanism and is used for executing personnel mismatching alarm operation and locking the medical payment mode of the medical financial payment mechanism when the target unrecognized instruction is received. According to the invention, when the target unrecognized instruction marking the medical card to be used by the bound user is received, the personnel mismatching alarm operation is executed and the medical payment mode of the medical financial payment institution is locked, otherwise, the personnel matching signal is sent to trigger the unlocking of the medical payment mode of the medical financial payment institution. Therefore, a scene that a non-matching person uses the payment account of another person to carry out payment is avoided.

Description

Technical Field

[0001] The present invention relates to the field of financial payment, and in particular to an intelligent identification system for mismatching of medical financial payment information. Background Art

[0002] The payment acquiring business bundles the most real capital flow and information flow of merchants, and is a huge gold mine waiting to be mined. Some third-party companies have now successfully entered other financial services. They not only stay in the acquiring industry, but have formed a complete set of solutions for small and medium-sized enterprises including efficient acquiring, financial services, membership management, prepaid cards, and wealth management.

[0003] Medical financial payment is a branch of financial payment, mainly used for paying hospital bills and medical equipment expenses. However, some criminals use other people's medical cards to pay for medical expenses, causing economic losses to medical card users. Such medical payments need to be detected and locked on site to detect violations during the payment process and avoid economic losses. However, there is no corresponding technical solution in the prior art. Summary of the invention

[0004] According to the present invention, a medical financial payment information mismatch intelligent identification system is provided, the system comprising: A data storage mechanism for storing the standard contour shapes of each authorized human body corresponding to each medical payment card number, each medical payment card number is used by the corresponding authorized human body when making payment at a medical financial payment institution; A card number reading mechanism, which is arranged in the medical financial payment institution and is wirelessly connected to the data storage mechanism, is used to read the medical payment card number inserted into the medical financial payment institution, and search the data storage mechanism for the standard contour shape of the authorized human body corresponding to the read medical payment card number to output as the target standard contour shape; A picture acquisition mechanism, which is arranged at the front end of the medical financial payment institution and connected to the card number reading mechanism, is used to perform picture acquisition on the financial payment scene at the front end of the medical financial payment institution when detecting that the card number reading mechanism outputs the target standard contour shape, so as to obtain a payment scene picture; A step-by-step identification mechanism is provided in the medical financial payment institution and connected to the picture acquisition mechanism, comprising a brightness analysis device, a gradient identification device and a contour matching device, wherein the gradient identification device is respectively connected to the brightness analysis device and the contour matching device, and the step-by-step identification mechanism is used to obtain the brightness values ​​corresponding to the pixels in the received payment scene picture, and take each pixel in the payment scene picture as a central pixel, determine the brightness value gradient of the central pixel based on the brightness values ​​of the central pixel and the pixels around it, and when the brightness value gradient of the central pixel exceeds the limit, judge the central pixel as an edge pixel to obtain the edge pixels in the payment scene picture, and take the image blocks surrounded by the edge pixels in the payment scene picture as the reference image blocks, and issue a target recognition instruction when the contour of a reference image block in the payment scene picture matches the target standard contour shape, and issue a target unrecognized instruction when the contour of each reference image block in the payment scene picture does not match the target standard contour shape; A real-time alarm mechanism, which is arranged in the medical financial payment institution and connected to the step-by-step identification mechanism, is used to execute a personnel mismatch alarm operation and lock the medical payment mode of the medical financial payment institution upon receiving the target unidentified instruction; Among them, the brightness value gradient of the central pixel point is determined based on the brightness values ​​of the central pixel point and the surrounding pixel points, and when the brightness value gradient of the central pixel point exceeds the limit, the central pixel point is judged to be an edge pixel point, including: determining the average of the brightness values ​​of the pixel points around the central pixel point, the greater the difference between the brightness value of the central pixel point and the average, the greater the brightness value gradient of the central pixel point.

[0005] The present invention can, upon receiving a target unidentified instruction marking a medical card as used by a bound user, execute a personnel mismatch alarm operation and lock the medical payment mode of a medical financial payment institution; and upon receiving a target identification instruction, send a personnel matching signal to trigger the unlocking of the medical payment mode of the medical financial payment institution, thereby avoiding the occurrence of a scenario in which an unmatched person uses another person's payment account to make a payment. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] The embodiments of the present invention will be described below with reference to the accompanying drawings.

[0007] Figure 1 Schematic diagram of the internal structure of the medical financial payment information mismatch intelligent identification system according to implementation A of the present invention.

[0008] Figure 2Schematic diagram of the internal structure of the medical financial payment information mismatch intelligent identification system according to implementation B of the present invention.

[0009] Figure 3 Schematic diagram of the internal structure of the medical financial payment information mismatch intelligent identification system according to implementation scheme C of the present invention. DETAILED DESCRIPTION

[0010] The implementation scheme of the medical financial payment information mismatch intelligent identification system of the present invention will be described in detail below with reference to the accompanying drawings.

[0011] Figure 1 This is a schematic diagram of the internal structure of a medical financial payment information mismatch intelligent identification system according to Embodiment A of the present invention, wherein the system comprises: A data storage mechanism for storing the standard contour shapes of each authorized human body corresponding to each medical payment card number, each medical payment card number is used by the corresponding authorized human body when making payment at a medical financial payment institution; Specifically, the data storage mechanism is used to store the standard contour shapes of each authorized human body corresponding to each medical payment card number, and each medical payment card number is used by the authorized human body corresponding to it when making payment at the medical financial payment institution, including: a TF storage device, a CF storage device or an MMC storage device can be selected to implement the data storage mechanism; A card number reading mechanism, which is arranged in the medical financial payment institution and is wirelessly connected to the data storage mechanism, is used to read the medical payment card number inserted into the medical financial payment institution, and search the data storage mechanism for the standard contour shape of the authorized human body corresponding to the read medical payment card number to output as the target standard contour shape; A picture acquisition mechanism, which is arranged at the front end of the medical financial payment institution and connected to the card number reading mechanism, is used to perform picture acquisition on the financial payment scene at the front end of the medical financial payment institution when detecting that the card number reading mechanism outputs the target standard contour shape, so as to obtain a payment scene picture; A step-by-step identification mechanism is provided in the medical financial payment institution and connected to the picture acquisition mechanism, comprising a brightness analysis device, a gradient identification device and a contour matching device, wherein the gradient identification device is respectively connected to the brightness analysis device and the contour matching device, and the step-by-step identification mechanism is used to obtain the brightness values ​​corresponding to the pixels in the received payment scene picture, and take each pixel in the payment scene picture as a central pixel, determine the brightness value gradient of the central pixel based on the brightness values ​​of the central pixel and the pixels around it, and when the brightness value gradient of the central pixel exceeds the limit, judge the central pixel as an edge pixel to obtain the edge pixels in the payment scene picture, and take the image blocks surrounded by the edge pixels in the payment scene picture as the reference image blocks, and issue a target recognition instruction when the contour of a reference image block in the payment scene picture matches the target standard contour shape, and issue a target unrecognized instruction when the contour of each reference image block in the payment scene picture does not match the target standard contour shape; A real-time alarm mechanism, which is arranged in the medical financial payment institution and connected to the step-by-step identification mechanism, is used to execute a personnel mismatch alarm operation and lock the medical payment mode of the medical financial payment institution upon receiving the target unidentified instruction; Wherein, determining the brightness value gradient of the central pixel point based on the brightness values ​​of the central pixel point and each pixel point around it, and when the brightness value gradient of the central pixel point exceeds a limit, judging that the central pixel point is an edge pixel point includes: determining the average of the brightness values ​​of each pixel point around the central pixel point, the greater the difference between the brightness value of the central pixel point and the average, the greater the brightness value gradient of the central pixel point; Wherein, the real-time alarm mechanism is also used to send a personnel matching signal to trigger the unlocking of the medical payment mode of the medical financial payment institution when receiving the target identification instruction.

[0012] Figure 2 The internal structure diagram of the medical financial payment information mismatch intelligent identification system according to Embodiment B of the present invention includes: A data storage mechanism for storing the standard contour shapes of each authorized human body corresponding to each medical payment card number, each medical payment card number is used by the corresponding authorized human body when making payment at a medical financial payment institution; A card number reading mechanism, which is arranged in the medical financial payment institution and is wirelessly connected to the data storage mechanism, is used to read the medical payment card number inserted into the medical financial payment institution, and search the data storage mechanism for the standard contour shape of the authorized human body corresponding to the read medical payment card number to output as the target standard contour shape; A picture acquisition mechanism, which is arranged at the front end of the medical financial payment institution and connected to the card number reading mechanism, is used to perform picture acquisition on the financial payment scene at the front end of the medical financial payment institution when detecting that the card number reading mechanism outputs the target standard contour shape, so as to obtain a payment scene picture; A step-by-step identification mechanism is provided in the medical financial payment institution and connected to the picture acquisition mechanism, comprising a brightness analysis device, a gradient identification device and a contour matching device, wherein the gradient identification device is respectively connected to the brightness analysis device and the contour matching device, and the step-by-step identification mechanism is used to obtain the brightness values ​​corresponding to the pixels in the received payment scene picture, and take each pixel in the payment scene picture as a central pixel, determine the brightness value gradient of the central pixel based on the brightness values ​​of the central pixel and the pixels around it, and when the brightness value gradient of the central pixel exceeds the limit, judge the central pixel as an edge pixel to obtain the edge pixels in the payment scene picture, and take the image blocks surrounded by the edge pixels in the payment scene picture as the reference image blocks, and issue a target recognition instruction when the contour of a reference image block in the payment scene picture matches the target standard contour shape, and issue a target unrecognized instruction when the contour of each reference image block in the payment scene picture does not match the target standard contour shape; A real-time alarm mechanism, which is arranged in the medical financial payment institution and connected to the step-by-step identification mechanism, is used to execute a personnel mismatch alarm operation and lock the medical payment mode of the medical financial payment institution upon receiving the target unidentified instruction; A positioning server device is connected to the real-time alarm mechanism, the brightness analysis device, the gradient identification device and the contour matching device respectively, and is used to provide the real-time alarm mechanism, the brightness analysis device, the gradient identification device and the contour matching device with their respective current instant positioning data; Wherein, the positioning server is respectively connected with the real-time alarm mechanism, the brightness analysis device, the gradient identification device and the contour matching device, and is used to provide the real-time alarm mechanism, the brightness analysis device, the gradient identification device and the contour matching device with their respective current instant positioning data, including: the positioning server includes a plurality of positioning service units, which are respectively connected with the real-time alarm mechanism, the brightness analysis device, the gradient identification device and the contour matching device, so as to complete the respective supply of the real-time alarm mechanism, the brightness analysis device, the gradient identification device and the contour matching device with their respective current instant positioning data; Wherein, the positioning server device includes a plurality of positioning service units, which are used to connect with the real-time alarm mechanism, the brightness analysis device, the gradient identification device and the contour matching device respectively, so as to complete the supply of the current instant positioning data of the real-time alarm mechanism, the brightness analysis device, the gradient identification device and the contour matching device respectively, including: the plurality of positioning service units are a plurality of positioning sensors, which are used to connect with the real-time alarm mechanism, the brightness analysis device, the gradient identification device and the contour matching device respectively, so as to complete the supply of the current instant positioning data of the real-time alarm mechanism, the brightness analysis device, the gradient identification device and the contour matching device respectively; Wherein, the plurality of positioning service units are a plurality of positioning sensors, which are used to be connected to the real-time alarm mechanism, the brightness analysis device, the gradient identification device and the contour matching device respectively, so as to complete the supply of the current instant positioning data of the real-time alarm mechanism, the brightness analysis device, the gradient identification device and the contour matching device respectively, including: the structures of the plurality of positioning service units are the same; And wherein, the multiple positioning service units are multiple positioning sensors, which are used to respectively connect with the real-time alarm mechanism, the brightness analysis device, the gradient identification device and the contour matching device to complete the respective supply of current instant positioning data to the real-time alarm mechanism, the brightness analysis device, the gradient identification device and the contour matching device, and also include: the multiple positioning sensors have the same positioning range.

[0013] Figure 3 The internal structure diagram of the medical financial payment information mismatch intelligent identification system according to Embodiment C of the present invention includes: A data storage mechanism for storing the standard contour shapes of each authorized human body corresponding to each medical payment card number, each medical payment card number is used by the corresponding authorized human body when making payment at a medical financial payment institution; A card number reading mechanism, which is arranged in the medical financial payment institution and is wirelessly connected to the data storage mechanism, is used to read the medical payment card number inserted into the medical financial payment institution, and search the data storage mechanism for the standard contour shape of the authorized human body corresponding to the read medical payment card number to output as the target standard contour shape; A picture acquisition mechanism, which is arranged at the front end of the medical financial payment institution and connected to the card number reading mechanism, is used to perform picture acquisition on the financial payment scene at the front end of the medical financial payment institution when detecting that the card number reading mechanism outputs the target standard contour shape, so as to obtain a payment scene picture; A step-by-step identification mechanism is provided in the medical financial payment institution and connected to the picture acquisition mechanism, comprising a brightness analysis device, a gradient identification device and a contour matching device, wherein the gradient identification device is respectively connected to the brightness analysis device and the contour matching device, and the step-by-step identification mechanism is used to obtain the brightness values ​​corresponding to the pixels in the received payment scene picture, and take each pixel in the payment scene picture as a central pixel, determine the brightness value gradient of the central pixel based on the brightness values ​​of the central pixel and the pixels around it, and when the brightness value gradient of the central pixel exceeds the limit, judge the central pixel as an edge pixel to obtain the edge pixels in the payment scene picture, and take the image blocks surrounded by the edge pixels in the payment scene picture as the reference image blocks, and issue a target recognition instruction when the contour of a reference image block in the payment scene picture matches the target standard contour shape, and issue a target unrecognized instruction when the contour of each reference image block in the payment scene picture does not match the target standard contour shape; A real-time alarm mechanism, which is arranged in the medical financial payment institution and connected to the step-by-step identification mechanism, is used to execute a personnel mismatch alarm operation and lock the medical payment mode of the medical financial payment institution upon receiving the target unidentified instruction; A user control interface is connected to the real-time alarm mechanism, the brightness analysis device, the gradient identification device and the plurality of positioning service units of the contour matching device, respectively, and is used to synchronously control the current working mode of the respective positioning service units of the real-time alarm mechanism, the brightness analysis device, the gradient identification device and the contour matching device; Wherein, the user control interface is respectively connected to the multiple positioning service units of the real-time alarm mechanism, the brightness analysis device, the gradient identification device and the contour matching device, and is used to synchronously control the current working mode of the respective positioning service units of the real-time alarm mechanism, the brightness analysis device, the gradient identification device and the contour matching device, including: the current working mode of the respective positioning service units of the real-time alarm mechanism, the brightness analysis device, the gradient identification device and the contour matching device is a sleep working mode or a running working mode; And wherein, the user control interface is respectively connected to multiple positioning service units of the real-time alarm mechanism, the brightness analysis device, the gradient identification device and the contour matching device, and is used to synchronously control the current working mode of the respective positioning service units of the real-time alarm mechanism, the brightness analysis device, the gradient identification device and the contour matching device, including: the multiple positioning service units of the real-time alarm mechanism, the brightness analysis device, the gradient identification device and the contour matching device are all based on the Beidou positioning mechanism.

[0014] In addition, in the medical financial payment information mismatch intelligent identification system, the brightness value gradient of the central pixel point is determined based on the brightness values ​​of the central pixel point and the pixels around it, and when the brightness value gradient of the central pixel point exceeds the limit, the central pixel point is judged to be an edge pixel point, which also includes: when the brightness value gradient of the central pixel point does not exceed the limit, the central pixel point is judged to be a non-edge pixel point.

[0015] The essential features and significant improvements of the technical solution of the present invention are: (1) Obtaining the brightness values ​​corresponding to the pixels in the received payment scene screen, taking each pixel in the payment scene screen as a central pixel, determining the brightness gradient of the central pixel based on the brightness values ​​of the central pixel and the pixels around it, and determining the central pixel as an edge pixel when the brightness gradient of the central pixel exceeds a limit, so as to obtain the edge pixels in the payment scene screen; (2) The image blocks enclosed by the edge pixels in the payment scene screen are used as reference image blocks. When the outline of a reference image block in the payment scene screen matches the target standard outline shape, a target recognition instruction is issued; otherwise, a target unrecognized instruction is issued, thereby realizing intelligent identification of whether the current medical payment card number matches the actual payer; (3) upon receiving a target unrecognized instruction, executing a personnel mismatch alarm operation and locking the medical payment mode of the medical financial payment institution; and upon receiving a target identification instruction, sending a personnel matching signal to trigger the unlocking of the medical payment mode of the medical financial payment institution, thereby avoiding the occurrence of a scenario where a non-matching person uses another person's payment account to make a payment; (4) Determine the brightness value gradient of the central pixel based on the brightness values ​​of the central pixel and the surrounding pixels, and judge the central pixel to be an edge pixel when the brightness value gradient of the central pixel exceeds a limit, wherein the average brightness value of the surrounding pixels is determined. The larger the difference between the brightness value of the central pixel and the average, the larger the brightness value gradient of the central pixel, thereby achieving targeted analysis of the brightness value gradient of the central pixel.

[0016] The medical financial payment information mismatch intelligent identification system of the present invention can solve the technical problem in the prior art that medical cards are maliciously used by unbound users, resulting in difficult-to-avoid on-site economic losses. When receiving an unidentified target instruction marking the medical card as used by a bound user, it can execute a personnel mismatch alarm operation and lock the medical payment mode of the medical financial payment institution. Otherwise, it can send a personnel matching signal to trigger the unlocking of the medical payment mode of the medical financial payment institution, thereby avoiding the scenario where unmatched personnel use other people's payment accounts to make payments.

[0017] It will be obvious to those skilled in the art that various modifications and variations can be made to the present invention. Therefore, the present invention is intended to cover modifications and variations of the present invention that fall within the scope of the appended claims and their equivalents.

Claims

1. An intelligent identification system for medical financial payment information mismatch, characterized in that: The system comprises: A data storage mechanism for storing the standard contour shapes of each authorized human body corresponding to each medical payment card number, each medical payment card number is used by the corresponding authorized human body when making payment at a medical financial payment institution; A card number reading mechanism, which is arranged in the medical financial payment institution and is wirelessly connected to the data storage mechanism, is used to read the medical payment card number inserted into the medical financial payment institution, and search the data storage mechanism for the standard contour shape of the authorized human body corresponding to the read medical payment card number to output as the target standard contour shape; A picture acquisition mechanism, which is arranged at the front end of the medical financial payment institution and connected to the card number reading mechanism, is used to perform picture acquisition on the financial payment scene at the front end of the medical financial payment institution when detecting that the card number reading mechanism outputs the target standard contour shape, so as to obtain a payment scene picture; A step-by-step identification mechanism is provided in the medical financial payment institution and connected to the picture acquisition mechanism, comprising a brightness analysis device, a gradient identification device and a contour matching device, wherein the gradient identification device is respectively connected to the brightness analysis device and the contour matching device, and the step-by-step identification mechanism is used to obtain the brightness values ​​corresponding to the pixels in the received payment scene picture, and take each pixel in the payment scene picture as a central pixel, determine the brightness value gradient of the central pixel based on the brightness values ​​of the central pixel and the pixels around it, and when the brightness value gradient of the central pixel exceeds the limit, judge the central pixel as an edge pixel to obtain the edge pixels in the payment scene picture, and take the image blocks surrounded by the edge pixels in the payment scene picture as the reference image blocks, and issue a target recognition instruction when the contour of a reference image block in the payment scene picture matches the target standard contour shape, and issue a target unrecognized instruction when the contour of each reference image block in the payment scene picture does not match the target standard contour shape; A real-time alarm mechanism, which is arranged in the medical financial payment institution and connected to the step-by-step identification mechanism, is used to execute a personnel mismatch alarm operation and lock the medical payment mode of the medical financial payment institution upon receiving the target unidentified instruction; Among them, the brightness value gradient of the central pixel point is determined based on the brightness values ​​of the central pixel point and the surrounding pixel points, and when the brightness value gradient of the central pixel point exceeds the limit, the central pixel point is judged to be an edge pixel point, including: determining the average of the brightness values ​​of the pixel points around the central pixel point, the greater the difference between the brightness value of the central pixel point and the average, the greater the brightness value gradient of the central pixel point.

2. The medical financial payment information mismatch intelligent identification system according to claim 1, characterized in that: The real-time alarm mechanism is also used to send a personnel matching signal to trigger the unlocking of the medical payment mode of the medical financial payment institution when receiving the target recognition instruction.

3. The medical financial payment information mismatch intelligent identification system as claimed in claim 2, characterized in that: The system further comprises: A positioning server device is connected to the real-time alarm mechanism, the brightness analysis device, the gradient identification device and the contour matching device respectively, and is used to provide the real-time alarm mechanism, the brightness analysis device, the gradient identification device and the contour matching device with their respective current instant positioning data; Among them, the positioning server is respectively connected to the real-time alarm mechanism, the brightness analysis device, the gradient identification device and the contour matching device, and is used to provide the real-time alarm mechanism, the brightness analysis device, the gradient identification device and the contour matching device with their respective current instant positioning data, including: the positioning server includes a plurality of positioning service units, which are respectively connected to the real-time alarm mechanism, the brightness analysis device, the gradient identification device and the contour matching device to complete the respective supply of the real-time alarm mechanism, the brightness analysis device, the gradient identification device and the contour matching device with their respective current instant positioning data.

4. The medical financial payment information mismatch intelligent identification system as claimed in claim 3, characterized in that: The positioning server device includes multiple positioning service units, which are used to connect with the real-time alarm mechanism, the brightness analysis device, the gradient identification device and the contour matching device respectively to complete the separate supply of current instant positioning data to the real-time alarm mechanism, the brightness analysis device, the gradient identification device and the contour matching device respectively. The multiple positioning service units are multiple positioning sensors, which are used to connect with the real-time alarm mechanism, the brightness analysis device, the gradient identification device and the contour matching device respectively to complete the separate supply of current instant positioning data to the real-time alarm mechanism, the brightness analysis device, the gradient identification device and the contour matching device respectively.

5. The medical financial payment information mismatch intelligent identification system as claimed in claim 4, characterized in that: The multiple positioning service units are multiple positioning sensors, which are used to connect to the real-time alarm mechanism, the brightness analysis device, the gradient identification device and the contour matching device respectively, so as to complete the respective supply of current instant positioning data to the real-time alarm mechanism, the brightness analysis device, the gradient identification device and the contour matching device, including: the structures of the multiple positioning service units are the same.

6. The medical financial payment information mismatch intelligent identification system according to claim 5, characterized in that: The multiple positioning service units are multiple positioning sensors, which are used to connect to the real-time alarm mechanism, the brightness analysis device, the gradient identification device and the contour matching device respectively to complete the separate supply of current instant positioning data to the real-time alarm mechanism, the brightness analysis device, the gradient identification device and the contour matching device. It also includes: the multiple positioning sensors have the same positioning range.

7. The medical financial payment information mismatch intelligent identification system according to any one of claims 3 to 6, characterized in that: The system further comprises: The user control interface is respectively connected to the multiple positioning service units of the real-time alarm mechanism, the brightness analysis device, the gradient identification device and the contour matching device, and is used to synchronously control the current working mode of the respective positioning service units of the real-time alarm mechanism, the brightness analysis device, the gradient identification device and the contour matching device.

8. The medical financial payment information mismatch intelligent identification system according to claim 7, characterized in that: The user control interface is respectively connected to multiple positioning service units of the real-time alarm mechanism, the brightness analysis device, the gradient identification device and the contour matching device, and is used to synchronously control the current working mode of the respective positioning service units of the real-time alarm mechanism, the brightness analysis device, the gradient identification device and the contour matching device, including: the current working mode of the respective positioning service units of the real-time alarm mechanism, the brightness analysis device, the gradient identification device and the contour matching device is a sleep working mode or a running working mode.

9. The medical financial payment information mismatch intelligent identification system according to claim 7, characterized in that: The user control interface is respectively connected to the multiple positioning service units of the real-time alarm mechanism, the brightness analysis device, the gradient identification device and the contour matching device, and is used to synchronously control the current working mode of the respective positioning service units of the real-time alarm mechanism, the brightness analysis device, the gradient identification device and the contour matching device, including: the multiple positioning service units of the real-time alarm mechanism, the brightness analysis device, the gradient identification device and the contour matching device are all based on the Beidou positioning mechanism.

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