Counting control device and reflective light sampling metrology apparatus

Abstract

The application provides a counting control device and a reflective light sampling measurement device, and relates to instrument technology. The device is applied to the reflective light sampling measurement device. The device comprises a detection module and a control module. The detection module is used for outputting a trigger signal when a target position of a sampling wheel of the reflective light sampling measurement device is detected. The control module is connected to the detection module and a light receiver of the reflective light sampling measurement device, and is used for acquiring the trigger signal and a light intensity signal respectively, and generating a counting instruction according to the trigger signal and the light intensity signal. The counting instruction is used for instructing a counting module of the reflective light sampling measurement device to count. According to the application, the measurement accuracy of the reflective light sampling measurement device can be improved.

Description

Technical Field

[0001] This application relates to instrumentation technology, and more particularly to a counting control device and a reflective light sampling metering device. Background Technology

[0002] Reflective optical sampling measurement is a method of measurement that uses optical sensing technology, typically used to detect the position, velocity, vibration, or other physical characteristics of an object. When applied to flow meters, reflective optical sampling measurement detects the rotation of a sampling wheel to infer the flow rate.

[0003] Specifically, flow meters that use reflective optical sampling measurement are called reflective optical sampling metering devices. The core principle of this device is that the light emitter generates a certain light signal to the sampling wheel. The sampling wheel is composed of two or more reflective areas. The intensity of the light signal reflected to the light receiver is also different depending on the reflective area. The rotation status of the sampling wheel can be determined based on the intensity of the light signal, thereby realizing the metering function.

[0004] However, in practical applications, reflective optical sampling and metering equipment may be in a vibrating environment, such as during transportation or on-site construction. In such cases, the sampling wheel often wobbles. When the wobbling of the sampling wheel is sufficient to meet the measurement criteria, it can lead to miscounting. Utility Model Content

[0005] This application provides a counting control device and a reflective light sampling meter to solve the problem of miscounting caused by vibration.

[0006] In a first aspect, this application provides a counting control device applied to a reflective light sampling metering device; the device includes a detection module and a control module; the device includes:

[0007] The detection module is used to output a trigger signal when the target position of the sampling wheel of the reflective light sampling metering device is detected;

[0008] The control module is connected to the detection module and the optical receiver of the reflective light sampling metering device, and is used to acquire the trigger signal and the light intensity signal, respectively, and generate a counting instruction based on the trigger signal and the light intensity signal; the counting instruction is used to instruct the counting module of the reflective light sampling metering device to count.

[0009] In another possible implementation, the detection module includes a sensor and a marker fixedly mounted on the sampling wheel, the marker being located at the target position; the sensor is specifically used for:

[0010] When the marker enters the detection range of the sensor, a trigger signal is output.

[0011] In another possible implementation, the control module is also connected to the processing module of the reflective light sampling metering device to acquire the processing result signal output by the processing module;

[0012] The processing module is connected to the optical receiver and is used to acquire the light intensity signal. The processing result signal is determined by the processing module based on the change law corresponding to the light intensity signal and a complete pulse period. When the light intensity signal meets the change law, the processing result signal is used to indicate that the light intensity signal meets the counting condition. The change law is related to at least two reflection areas set on the sampling wheel.

[0013] In another possible implementation, the control module is specifically used for:

[0014] When the processing result signal indicates that each of the light intensity signals meets the counting condition, if only one trigger signal is received within the complete pulse period, a counting instruction is generated to instruct the counting module to increment by one.

[0015] If more than one trigger signal is received within the complete pulse cycle, a counting instruction is generated to instruct the counting module to increment by zero.

[0016] In another possible implementation, the control module is specifically used for:

[0017] When the processing result signal indicates that each of the light intensity signals does not meet the counting condition, a counting instruction is generated to instruct the counting module to add zero.

[0018] In another possible implementation, the marker is a magnetic material and the sensor is a Hall sensor.

[0019] In another possible implementation, the control module is also used for:

[0020] When the processing result signal indicates that each of the light intensity signals meets the counting condition, if the trigger signal is continuously received within the complete pulse cycle, an alarm signal is output.

[0021] In another possible implementation, the marker is a metallic substance and the sensor is a proximity switch.

[0022] In another possible implementation, when the sensor is a light sensor, the marker is an LED bead, the light sensor is located inside a first light shield, the LED bead is located inside a second light shield, and the first and second light shields have openings on opposite sides.

[0023] In a second aspect, this application provides a reflective light sampling and metering device, the device comprising a sampling wheel, a counting module, a light detection device, and a counting control device as described in any of the first aspects;

[0024] The light detection device includes a light receiver, which is used to receive reflected light from the surface of the sampling wheel to obtain a light intensity signal;

[0025] The counting control device includes a detection module and a control module. The detection module is used to output a trigger signal when the target position of the sampling wheel is detected. The control module is connected to the detection module and the light receiver, and is used to acquire the trigger signal and the light intensity signal, respectively, and generate a counting command based on the trigger signal and the light intensity signal.

[0026] The counting module is connected to the control module and is used to acquire the counting instruction and count according to the counting instruction.

[0027] This application provides a counting control device and a reflective optical sampling metering device. The counting control device includes a detection module and a control module connected to the detection module. Specifically, the detection module outputs a trigger signal when the sampling wheel of the reflective optical sampling metering device reaches a target position. The control module acquires the trigger signal through the detection module, acquires the light intensity signal during the rotation of the sampling wheel through the light receiver of the reflective optical sampling metering device, and generates technical instructions for instructing the counting module of the reflective optical sampling metering device based on the trigger signal and the light intensity signal. With this device, when the light intensity signal during the rotation of the sampling wheel indicates that the counting condition is met, the trigger signal is used to determine whether the false count is due to sampling wheel vibration, thereby effectively avoiding false counting caused by sampling wheel vibration. Attached Figure Description

[0028] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0029] Figure 1 This is a schematic diagram illustrating an application scenario of a counting control device provided in an embodiment of this application;

[0030] Figure 2 This is a schematic diagram of the structure of a counting control device provided in an embodiment of this application;

[0031] Figure 3 A schematic diagram illustrating the positional relationship between a counting control device and a sampling wheel, provided in an embodiment of this application;

[0032] Figure 4This is a schematic diagram of the structure of a reflective light sampling metering device provided in an embodiment of this application.

[0033] Explanation of reference numerals in the attached figures:

[0034] 31-Magnet; 32-Hall sensor; 33-Sampling wheel; 34-Optical receiver; 35-Optical transmitter.

[0035] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0036] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model. To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0037] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0038] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0039] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" or "several" means two or more, unless otherwise explicitly specified.

[0040] Reflective optical sampling measurement is a method of measurement that utilizes optical sensing technology and is widely used to detect the position, velocity, vibration, or other physical characteristics of objects. For example, it can be used to detect the position of the sampling wheel in a flow meter, thereby inferring the flow rate of the fluid.

[0041] Specifically, flow meters that use reflective optical sampling measurement are called reflective optical sampling metering devices. These devices generally include several key components such as a light emitter, a sampling wheel, and a light receiver. Based on this, the core principle of the device is that the light emitter generates a certain light signal to the sampling wheel. Since the sampling wheel is composed of two or more reflective areas, the intensity of the light signal reflected to the light receiver varies depending on the reflective area. Therefore, the rotation status of the sampling wheel can be determined based on the strength of the light signal, thereby realizing the measurement of flow rate.

[0042] More specifically, in known technologies, reflective optical sampling metering devices also include a counting module and a processing module, which achieve electromechanical conversion. Generally, a light emitter continuously emits light onto a sampling wheel. When a flow passes through, it drives the sampling wheel to rotate. During rotation, a light receiver receives light reflected from different positions on the sampling wheel, generating a light intensity signal, which is then sent to the processing module. When the light intensity signal meets the counting condition, the processing module controls the counting module to increment by one or other values, thereby achieving electronic counting.

[0043] The processing module determines that the light intensity signal meets the counting condition when it detects a variation pattern within a complete pulse cycle. Understandably, once the reflection areas of the sampling wheel are determined, the intensity of the light signal received by the light receiver changes as the sampling wheel rotates, forming a periodic signal pattern. For example, if the sampling wheel has two different reflection areas (high reflection and low reflection), the variation pattern of the light intensity signal within a complete pulse cycle is: starting from a peak value, gradually decreasing to a trough value, and then gradually increasing back to a peak value.

[0044] Understandably, in practical applications, reflective optical sampling metering equipment may be affected by vibration. This vibration may originate from equipment transportation, on-site construction, or other environmental factors. Vibration causes the sampling wheel to sway, which in turn affects the reflection path and intensity of the optical signal. When the sway of the sampling wheel reaches a certain level, the signal intensity received by the optical receiver may change to meet the counting conditions. Since reflective optical sampling metering equipment relies on changes in light intensity signals for its measurement, this can lead to false counting. Such false counting directly affects the accuracy of the flow meter and may result in incorrect flow measurement results.

[0045] Understandably, software algorithms can filter out some issues, but they cannot completely eliminate the problems mentioned above, and the algorithm logic becomes more complex. Continuous sampling can address these issues, but this approach is clearly unsuitable for low-power metering instruments. Increasing the reflective area of ​​the sampling wheel can significantly reduce the risk of false counting, but ensuring sufficient sampling points in each reflective area sacrifices the meter's measurement accuracy and places higher demands on its structure and components.

[0046] Therefore, this application provides a counting control device and a reflective light sampling meter to avoid miscounting caused by the shaking of the sampling wheel during vibration. Specifically, the counting control device of this application uses a detection module to detect the rotation of the sampling wheel within the period corresponding to the current counting condition, in order to determine whether the light intensity signal meets the counting condition due to the shaking of the sampling wheel.

[0047] Figure 1 This is a schematic diagram illustrating an application scenario of a counting control device provided in an embodiment of this application, such as... Figure 1 As shown, the counting control device of this application can be applied to reflective light sampling metering equipment. Specifically, as... Figure 1 As shown, the reflective optical sampling metering device includes a sampling wheel, a light emitter, a light receiver, and a counting module. The light emitter emits light into the reflective area of ​​the sampling wheel, and the light receiver receives the reflected light from the reflective area of ​​the sampling wheel to obtain a light intensity signal. When using the counting control device of this application, the control module is connected to the light receiver and the counting module via wired or wireless means. The control module acquires the light intensity signal through the light receiver and generates a counting command to instruct the counting module to count based on the light intensity signal and the trigger signal transmitted by the detection module.

[0048] With the above settings, when the light intensity signal meets the counting conditions, it can be further combined with the trigger signal of the detection module to eliminate false counting caused by the shaking of the sampling wheel during vibration, thereby effectively improving the measurement accuracy.

[0049] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Where the embodiments do not conflict, the following embodiments and features thereof can be combined with each other.

[0050] This application provides a counting control device applicable to any reflective optical sampling metering device. The reflective optical sampling metering device includes a light emitter, a light receiver, a sampling wheel, and a counting module. The sampling wheel has at least two reflective areas on one side. The light emitter and light receiver are positioned directly opposite each other. The light emitter emits light into the reflective areas of the sampling wheel, and the light receiver receives the reflected light and records the light intensity signal. The counting module performs electronic counting based on changes in the light intensity signal from the sampling wheel.

[0051] Figure 2 This is a schematic diagram of the structure of a counting control device provided in an embodiment of this application, as shown below. Figure 2 As shown, the device provided in this embodiment includes a detection module and a control module that is communicatively connected to the detection module.

[0052] In this embodiment, the detection module is used to output a trigger signal when the target position of the sampling wheel of the reflective light sampling metering device is detected.

[0053] Specifically, the target position is any location on the sampling wheel except for the pivot. When the target position on the sampling wheel falls within the detection range of the detection module, the detection module outputs a trigger signal. In other words, when the sampling wheel rotates one revolution, the detection module encounters the target position once, meaning the target position falls within the detection range of the detection module once, and the detection module outputs only one trigger signal. As a preferred example, the target position is located at the boundary between any two reflective areas.

[0054] More specifically, in this embodiment, the detection module includes a sensor and a marker. The marker is fixedly connected to the sampling wheel. It can be understood that the location of the marker is the target location; in this embodiment, the marker is positioned near the edge of the sampling wheel. The sensor is positioned close to the sampling wheel so that when the sampling wheel rotates to a position where the marker is directly opposite the sensor, the sensor can detect the marker. In this embodiment, the sensor is specifically used to output a trigger signal when the marker enters the sensor's detection range.

[0055] Based on this, as one design, the sensor can specifically be a Hall sensor, and the corresponding marker can specifically be a magnetic material. As another design, the sensor can specifically be a proximity switch, and the corresponding marker can specifically be a metallic material. As yet another design, the sensor can specifically be a light sensor, and the corresponding marker can be an LED. It is understood that, to reduce interference between the light emitter and the light receiver, the light sensor is located inside a first light shield, and the LED is located inside a second light shield, with the openings of the first and second light shields positioned on opposite sides. Furthermore, to completely avoid interference between the light emitter and the light receiver, the side with the opening of the second light shield is positioned away from the light receiver and the light emitter.

[0056] It is understood that in practical applications, the sensor can be other sensors, and correspondingly, the marker can also be other markers. This embodiment does not limit this, as long as the sensor can output a trigger signal when the marker enters its detection range. As a preferred example, the marker is located at the critical point of the sensor's detection range to ensure that the sensor can only output one trigger signal within one effective measurement cycle.

[0057] In this embodiment, the control module is connected to the sensor of the detection module via a wired or wireless connection to acquire the trigger signal output by the sensor. The controller is also connected to the light receiver of the reflective light sampling metering device via a wired or wireless connection to acquire the light intensity signal.

[0058] In addition, the control module is connected to the counting module via wired or wireless means. Based on this, the controller generates counting commands according to the trigger signal and the light intensity signal, and sends the counting commands to the counting module, so that the module can perform counting operations based on the counting commands.

[0059] In this embodiment, the function of the control module is implemented in hardware. As one possible implementation, the control module includes a counter, a first comparator, a second comparator, and digital logic gates.

[0060] The counter's input is connected to the sensor's output, used to count the number of trigger signals received. Understandably, after generating a counting instruction, the counter is reset to zero. The counter's output is connected to the input of a first comparator, which compares the number of received trigger signals with 1. The first comparator outputs a first value when the number of received trigger signals equals 1, and outputs a second value when the number of received trigger signals is not equal to 1.

[0061] The input of the second comparator is connected to the output of the optical receiver. It is used to acquire the light intensity signal and compare the received light intensity signal with the change pattern corresponding to a complete pulse cycle. If the light intensity signal conforms to the change pattern corresponding to a complete pulse cycle, the first value is output; otherwise, the second value is output.

[0062] The digital logic gate circuit is specifically an AND gate circuit. One input of the AND gate circuit is connected to the output of a first comparator, and the other input is connected to the output of a second comparator. The output of the AND gate circuit is connected to the input of the counting module. It outputs a high level when both inputs receive the first value, and a low level otherwise. Specifically, a high output from the AND gate circuit is interpreted as an instruction to increment the counting module by one, and a low output is interpreted as an instruction to increment the counting module by zero.

[0063] It is understood that digital logic gates are not limited to AND gates; the outputs of the first and second comparators can be modified accordingly. This embodiment does not impose any limitations on this.

[0064] As another possible implementation, any two of the above parts can be combined to form a new integrated circuit. For example, the first comparator, the second comparator and the digital logic circuit can be combined to obtain an integrated circuit. This embodiment does not limit this, as long as it can ultimately generate a counting instruction based on the trigger signal and the light intensity signal.

[0065] The counting control device provided in this embodiment includes a detection module capable of outputting a trigger signal reflecting the rotation of the sampling wheel, and a control module capable of generating a counting command by combining the light intensity signal and the trigger signal. Through this counting control device, the counting module can count by combining the rotation of the sampling wheel and the light intensity signal output by the light receiver, thereby reducing the risk of miscounting caused by the shaking of the sampling wheel during vibration, and thus improving the counting accuracy of the counting module.

[0066] Furthermore, the counting control device provided in this embodiment ensures that the incoming marker can be reliably detected by the corresponding sensor during each rotation of the sampling wheel, without the need for continuous high-frequency sampling of the entire sampling wheel. This gives the device the advantage of low requirements for sampling points, allowing the sampling wheel to rotate faster and thus improving measurement accuracy.

[0067] As a preferred example, the control module generates a counting instruction based on the trigger signal and the light intensity signal, specifically including:

[0068] The control module connects to the processing module of the reflective light sampling metering device via wired or wireless means to acquire the processing result signal output by the processing module based on the light intensity signal. Further, the control module generates a counting instruction based on the processing result signal and the trigger signal. Specifically, when the processing result signal indicates that each light intensity signal meets the counting condition, if only one trigger signal is received within a complete pulse period, a counting instruction is generated to instruct the counting module to increment by one; if more than one trigger signal is received within a complete pulse period, a counting instruction is generated to instruct the counting module to increment by zero. When the processing result signal indicates that each light intensity signal does not meet the counting condition, a counting instruction is generated to instruct the counting module to increment by zero.

[0069] As is known from existing technology, the input terminal of the processing module is connected to the output terminal of the optical receiver to acquire the light intensity signal. The processing module outputs a processing result signal based on the light intensity signal. Specifically, when the light intensity signal conforms to the variation pattern corresponding to a complete pulse cycle, the processing module outputs a processing result signal indicating that the light intensity signal meets the counting condition; when the light intensity signal does not conform to the variation pattern corresponding to a complete pulse cycle, the processing module outputs a processing result signal indicating that the light intensity signal does not meet the counting condition. It should be understood that the variation pattern corresponding to a complete pulse cycle is related to at least two reflection areas set on the sampling wheel.

[0070] Based on this, the control module specifically includes a counter, a first comparator, and digital logic gates. The specific limitations of the counter and the first comparator can be found in the aforementioned embodiments, and will not be repeated here. In this embodiment, the digital logic gate is specifically an AND gate, with one input connected to the output of the first comparator and the other input connected to the output of the processing module. It should be understood that the AND gate outputs a high level when it receives a processing result signal indicating that the light intensity signal meets the counting conditions, and a first value; otherwise, it outputs a low level.

[0071] The above settings effectively reduce the complexity of the control module, which on the one hand helps to ensure processing efficiency, and on the other hand can effectively save the manufacturing cost of the counting control device.

[0072] Understandably, when the marker is a magnetic material and the sensor is a Hall sensor, the control module generates a counting command based on the trigger signal and the light intensity signal, and also includes:

[0073] When the processing result signal indicates that each light intensity signal meets the counting condition, if a trigger signal is continuously received within a complete pulse cycle, an alarm signal is output.

[0074] Specifically, the control module may include a microcontroller. The input of the microcontroller is connected to the output of the counter, and the output is connected to the input of the alarm of the reflective light sampling metering device. Based on this, the microcontroller acquires the value of the counter, and if the counter value continues to increase within a complete pulse cycle, it outputs an alarm signal to the alarm to prompt the user to promptly inspect and maintain the reflective light sampling metering device or the counting control device.

[0075] As an example, the counting control device includes a detection module comprising a magnet and a Hall sensor. The magnet is positioned at the boundary between any two reflective areas of the sampling wheel, and is located within the critical region of the Hall sensor's detection range. Specifically, Figure 3 This is a schematic diagram illustrating the positional relationship between a counting control device and a sampling wheel, as provided in an embodiment of this application. Figure 3 As shown, the magnet 31 is specifically positioned near the edge of the sampling wheel 33, and the Hall sensor 32 is located just within its detection range. The light receiver 34 and light emitter 35 are arranged side-by-side between the outer and inner rings of the sampling wheel 33. More specifically, the sampling wheel 33, based on the height of the light receiver 34 and light emitter 35, is positioned as close as possible to the PCB board where the light receiver 34 and light emitter 35 are located, while allowing for structural allowances. It is understandable that... Figure 3 In the process, the area between the outer and inner rings of the sampling wheel 33 is divided into two, serving as two reflective areas, with the magnet 31 located at the junction of the two reflective areas.

[0076] This application also provides a reflective light sampling and metering device. Figure 4 This is a schematic diagram of the structure of a reflective light sampling metering device provided in an embodiment of this application. Figure 4 As shown, the device includes a sampling wheel, a counting module, a light detection device, and the counting control device in the aforementioned embodiments.

[0077] The optical detection device includes a light receiver, which is used to receive reflected light from the surface of the sampling wheel to obtain a light intensity signal.

[0078] The counting control device includes a detection module and a control module. The detection module outputs a trigger signal when the target position of the sampling wheel is detected. The control module is connected to the detection module and the light receiver, and is used to acquire the trigger signal and the light intensity signal, respectively, and generate a counting command based on the trigger signal and the light intensity signal.

[0079] The counting module is connected to the control module and is used to obtain counting instructions and count according to the counting instructions.

[0080] Specifically, such as Figure 4As shown, the reflective light sampling metering device may further include a processing module and an alarm module. The control module is connected to the light receiver, processing module, counting module, and alarm module. For more detailed descriptions of each part, please refer to the foregoing embodiments; they will not be repeated here.

[0081] The reflective light sampling metering device provided in this application, by including the counting control device of the aforementioned embodiment, can effectively avoid false counting conditions caused by the shaking of the sampling wheel during vibration, thereby improving the counting accuracy.

[0082] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with an embodiment or example that are included in at least one embodiment or example of this utility model.

[0083] In this specification, the illustrative expressions of the terms used do not necessarily refer to the same implementation or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more implementations or examples.

[0084] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A counting control device, characterized by comprising: Applied to reflective optical sampling and measurement equipment; the device includes a detection module and a control module; The detection module includes a sensor and a marker fixedly mounted on the sampling wheel of the reflective light sampling metering device, the marker being located at the target position; the sensor is specifically used for: When the marker enters the detection range of the sensor, a trigger signal is output; The control module is electrically connected to the sensor and the optical receiver of the reflective light sampling metering device, respectively, and is used to acquire the trigger signal and the light intensity signal, and generate a counting instruction based on the trigger signal and the light intensity signal; the counting instruction is used to instruct the counting module of the reflective light sampling metering device to count.

2. The apparatus of claim 1, wherein, The control module includes a counter, a first comparator, a second comparator, and digital logic gate circuits; The input terminal of the counter is electrically connected to the output terminal of the sensor; The input terminal of the first comparator is electrically connected to the output terminal of the counter; The input terminal of the second comparator is electrically connected to the output terminal of the optical receiver; The digital logic gate circuit is an AND gate circuit. One input terminal of the AND gate circuit is connected to the output terminal of the first comparator, and the other input terminal is connected to the output terminal of the second comparator. The output terminal of the AND gate circuit is used to output the counting instruction.

3. The apparatus of claim 1, wherein, The control module is also connected to the processing module of the reflective light sampling metering device, and is used to acquire the processing result signal output by the processing module; The processing module is connected to the optical receiver and is used to acquire the light intensity signal. The processing result signal is determined by the processing module based on the change law corresponding to the light intensity signal and a complete pulse cycle. When the light intensity signal meets the change law, the processing result signal is used to indicate that the light intensity signal meets the counting condition. The change law is related to at least two reflection areas set on the sampling wheel.

4. The apparatus of claim 3, wherein, The control module is specifically used for: When the processing result signal indicates that each of the light intensity signals meets the counting condition, if only one trigger signal is received from the sensor within the complete pulse cycle, a counting instruction is generated to instruct the counting module to increment by one. If more than one trigger signal is received within the complete pulse cycle, a counting instruction is generated to instruct the counting module to increment by zero.

5. The apparatus of claim 3, wherein, The control module is specifically used for: When the processing result signal indicates that each of the light intensity signals does not meet the counting condition, a counting instruction is generated to instruct the counting module to add zero.

6. The apparatus of claim 1 or 2, wherein, The marker is a magnetic material, and the sensor is a Hall sensor.

7. The apparatus of claim 3 or 4, wherein, The control module is also used for: When the processing result signal indicates that each of the light intensity signals meets the counting condition, if the trigger signal is continuously received within the complete pulse cycle, an alarm signal is output.

8. The apparatus of claim 1 or 2, wherein, The marker is a metallic substance, and the sensor is a proximity switch; Alternatively, the sensor may be a light sensor, and the marker may be an LED bead; wherein the light sensor is located inside a first light shield, the LED bead is located inside a second light shield, and the first and second light shields have openings on opposite sides of each other.

9. The apparatus according to claim 1 or 2, characterized in that, The marker is located at the boundary between any two reflective areas on the sampling wheel.

10. A reflective optical sampling metrology apparatus, characterized by, The device includes a sampling wheel, a counting module, a light detection device, and a counting control device as described in any one of claims 1-9; The light detection device includes a light receiver, which is used to receive reflected light from the surface of the sampling wheel to obtain a light intensity signal; The sensor in the counting control device is positioned near the sampling wheel and is used to output a trigger signal when the marker enters its detection range. The marker is fixed on the sampling wheel, and the control module is electrically connected to the sensor and the light receiver. The counting module is connected to the control module and is used to acquire the counting instruction and count according to the counting instruction.

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