Interpolated groove type photoelectric sensor and device

Abstract

The utility model discloses an interpolated groove type photoelectric sensor and device, which belongs to the technical field of photoelectric sensors, and comprises a signal receiving module, a signal processing module, an output module, a Power module and a protection module, the signal receiving module is used for transmitting and receiving optical signals; the signal processing module is used for processing the optical signal received by the signal receiving module so as to convert the optical signal into an electric signal; the output module is used for outputting the electric signal converted by the signal processing module; the Power module is respectively connected with the signal receiving module, the signal processing module and the output module so as to respectively supply power to the signal receiving module, the signal processing module and the output module through the Power module; and the protection module is connected with the Power module, and the protection module is used for absorbing surge voltage. According to the utility model, the technical effects of improved light interference resistance and surge resistance and small sensor hysteresis are achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of photoelectric sensors, and in particular relates to an internal insertion slot type photoelectric sensor and a device. Background Art

[0002] The slot-type photoelectric sensor is a through-beam photoelectric switch widely used in various equipment such as mechanical positioning. The slot-type photoelectric sensor is an infrared sensing photoelectric product composed of an infrared emitting tube and an infrared receiving tube. The slot width determines the strength of the sensing and receiving model and the distance of the received signal. Using light as the medium, infrared light between the light emitter and the light receiver is received and converted to detect the position of the object. In the absence of obstruction, the light receiver can receive light. However, when the object being detected passes through the slot, the light is blocked, and the photoelectric switch is activated, outputting a switch control signal to cut off or connect the load current, completing a control action. Existing slot-type photoelectric sensors have poor resistance to light interference and surges, and the sensor has large hysteresis, which limits their application in outdoor environments and high-frequency infrared irradiation scenarios.

[0003] Therefore, it is necessary to provide a new technical solution to solve the above technical problems. Utility Model Content

[0004] The technical problems to be solved by the utility model are poor anti-light interference and anti-surge capabilities and large sensor hysteresis.

[0005] In order to solve the above technical problems, the utility model provides an interpolation slot-type photoelectric sensor, which includes: a signal receiving module, a signal processing module, an output module, a Power module and a protection module. The signal receiving module is used to transmit and receive optical signals; the signal processing module is used to process the optical signals received by the signal receiving module to convert the optical signals into electrical signals; the output module is used to output the electrical signals converted by the signal processing module; the Power module is respectively connected to the signal receiving module, the signal processing module and the output module to power the signal receiving module, the signal processing module and the output module respectively through the Power module; the protection module is connected to the Power module, and the protection module is used to absorb surge voltage.

[0006] Optionally, the signal receiving module includes: an infrared emitting tube and an infrared receiving tube, the infrared emitting tube is used to emit infrared light, and the infrared receiving tube is used to receive the infrared light.

[0007] Optionally, the signal processing module includes: a logic component, which changes the logic state through a pin to output in a normally open mode or a normally closed mode.

[0008] Optionally, the output form of the output module is an electrical signal, and the electrical signal includes a normally open signal, a normally closed signal, or a pulse signal.

[0009] Optionally, the protection module includes: an anti-surge circuit, which is used to absorb the surge voltage through a varistor and a current-limiting resistor when a surge voltage enters the sensor.

[0010] Optionally, the surge voltage is not higher than 200V.

[0011] Optionally, the protection module includes: a short-circuit protection circuit, which is used to cut off or limit current when a short circuit occurs.

[0012] Optionally, the protection module includes: an overload protection circuit, which is used to disconnect the circuit when the load current in the circuit exceeds a preset safety value.

[0013] Optionally, the Power module includes: an input voltage unit and an LDO conversion unit connected to the input voltage unit, the input voltage of the input voltage unit has a numerical range of 5V to 24V; the LDO conversion unit converts the input voltage into 3.3V, and the LDO conversion unit is respectively connected to the signal receiving module, the signal processing module and the output module to power the signal receiving module, the signal processing module and the output module respectively through the LDO conversion unit.

[0014] According to another aspect of the present invention, the present invention further provides a device, which includes the above-mentioned internal insertion slot-type photoelectric sensor.

[0015] Beneficial effects:

[0016] The utility model provides an internal slot-type photoelectric sensor. A power module is connected to a signal receiving module, a signal processing module, and an output module, respectively, to provide power to the signal receiving module, signal processing module, and output module. The signal receiving module transmits and receives optical signals, and the signal processing module processes the optical signals received by the signal receiving module to convert them into electrical signals. The output module outputs the electrical signals converted by the signal processing module. A protection module is connected to the power module and is used to absorb surge voltages. After the signal receiving module detects changes in external optical signals, it transmits the captured optical signals to the signal processing module for conversion and processing. The signal processing module converts the optical signals into corresponding electrical signals and transmits the converted electrical signals to the output module for reading or processing by external devices. The power module also provides stable power to the signal receiving module, signal processing module, and output module, ensuring their normal operation. Furthermore, when surge voltages occur, the protection module promptly absorbs and dissipates harmful voltage fluctuations, effectively protecting the electronic components within the sensor from damage. Thereby achieving the technical effect of improving the anti-light interference and anti-surge capabilities and reducing the sensor hysteresis. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. 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 any creative work.

[0018] Figure 1 This is a circuit principle block diagram of an interpolation slot-type photoelectric sensor provided in an embodiment of the utility model.

[0019] Figure 2 This is a circuit principle block diagram of a protection module in an internal insertion slot-type photoelectric sensor provided by an embodiment of the utility model.

[0020] Figure 3 This is a circuit principle block diagram of a signal processing module in an interpolation slot-type photoelectric sensor provided by an embodiment of the utility model.

[0021] Figure 4 This is a circuit principle block diagram of a Power module in an interposer-type slot-type photoelectric sensor provided in an embodiment of the utility model. DETAILED DESCRIPTION

[0022] The embodiments of the present application are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application and are not to be construed as limiting the present application.

[0023] In order to enable those skilled in the art to better understand the solutions of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative efforts are within the scope of protection of this application.

[0024] In the embodiments of this application, "at least one" refers to one or more; "a plurality" refers to two or more. In the description of this application, the terms "first," "second," "third," etc. are used only for the purpose of distinguishing descriptions and should not be understood as indicating or implying relative importance or order.

[0025] References to "one embodiment" or "some embodiments" described in this specification mean that one or more embodiments of the present application include specific features, structures or characteristics described in conjunction with the embodiment. Therefore, in this specification, the terms "include", "comprise", "have" and their variations all mean "including but not limited to", unless otherwise specifically emphasized in other ways. It should be noted that in the embodiments of the present application, "and / or" describes the association relationship of associated objects, indicating that three relationships can exist. For example, A and / or B can represent three situations: A exists alone, A and B exist at the same time, and B exists alone.

[0026] It should be pointed out that, in the embodiment of the present invention, when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may also be a central component. When a component is considered to be "connected" to another component, it may be directly connected to the other component or there may be a central component at the same time. When a component is considered to be "set on" another component, it may be directly set on the other component or there may be a central component at the same time. At the same time, "connection" in the embodiment of the present application can also be understood as electrical connection, and the connection between two electrical components can be a direct or indirect connection between the two electrical components. For example, A and B are connected, which can be either A and B directly connected, or A and B indirectly connected through one or more other electrical components. The terms "vertical", "horizontal", "left", "right" and similar expressions used in the embodiment of the present invention are for illustrative purposes only and are not intended to limit the present invention.

[0027] The first embodiment of the utility model provides an internal insertion slot type photoelectric sensor. Figures 1 to 4 As shown, Figure 1 This is a circuit principle block diagram of an interpolation slot-type photoelectric sensor provided by an embodiment of the utility model. Figure 2 This is a circuit principle block diagram of a protection module 5 in an interpolation slot-type photoelectric sensor provided by an embodiment of the utility model. Figure 3 This is a circuit principle block diagram of a signal processing module 2 in an interpolation slot-type photoelectric sensor provided by an embodiment of the present utility model. Figure 4 This is a circuit principle block diagram of the Power module 4 in an interpolation slot-type photoelectric sensor provided by an embodiment of the present invention. The interpolation slot-type photoelectric sensor provided by an embodiment of the present invention includes a signal receiving module 1, a signal processing module 2, an output module 3, a Power module 4 and a protection module 5. The signal receiving module 1 transmits and receives optical signals, and the signal processing module 2 can process the optical signals received by the signal receiving module 1 to convert the optical signals into electrical signals. The output module 3 can output the electrical signals converted by the signal processing module 2. The Power module 4 is respectively connected to the signal receiving module 1, the signal processing module 2 and the output module 3 to respectively supply power to the signal receiving module 1, the signal processing module 2 and the output module 3 through the Power module 4. The protection module 5 is connected to the Power module 4, and the protection module 5 is used to absorb surge voltage.

[0028] Among them, the signal receiving module 1 is used to transmit and receive external optical signals, serving as the sensor's sensing front end. The signal processing module 2 receives the optical signal from the signal receiving module 1 and converts the optical signal into an electrical signal for subsequent processing. The output module 3 outputs the electrical signal converted by the signal processing module 2 for external equipment to read or further process. The power module 4 is connected to the signal receiving module 1, the signal processing module 2, and the output module 3 respectively to provide stable power. After being connected to the power module 4, the protection module 5 is used to absorb possible intrusion surge voltage to protect the electronic components inside the sensor from damage.

[0029] In this embodiment, the power module 4 is connected to the signal receiving module 1, the signal processing module 2, and the output module 3 respectively, so that the power module 4 can power the signal receiving module 1, the signal processing module 2, and the output module 3 respectively. The signal receiving module 1 is used to transmit and receive optical signals, and the signal processing module 2 is used to process the optical signals received by the signal receiving module 1 to convert the optical signals into electrical signals. The output module 3 is used to output the electrical signals converted by the signal processing module 2. The protection module 5 is connected to the power module 4, and the protection module 5 is used to absorb surge voltage. In this way, after the signal receiving module 1 captures the changes in the external optical signal, the captured optical signal is transmitted to the signal processing module 2 for conversion and processing. The signal processing module 2 converts the optical signal into a corresponding electrical signal and outputs the converted electrical signal to the output module 3 for reading or processing by an external device. At the same time, the power module 4 provides stable power to the signal receiving module 1, the signal processing module 2, and the output module 3, ensuring that the signal receiving module 1, the signal processing module 2, and the output module 3 can operate normally. Furthermore, when a surge voltage intrudes, the protection module 5 can promptly absorb and disperse harmful voltage fluctuations, effectively protecting the electronic components inside the sensor from damage. This achieves the technical effects of improving the resistance to light interference and surges, and reducing sensor hysteresis.

[0030] As an embodiment, the signal receiving module 1 includes an infrared emitting tube and an infrared receiving tube. The infrared emitting tube is used to emit infrared light, and the infrared receiving tube is used to receive the infrared light emitted by the infrared emitting tube. The infrared emitting tube and the infrared receiving tube of the signal receiving module 1 work together to capture the movement of external objects. When an object passes through the light curtain, the change in the light signal is quickly captured and transmitted to the signal processing module 2. The signal processing module 2 converts and processes the received light signal, converting the light signal into an electrical signal, which is then output by the output module 3 for reading or processing by an external device. It can effectively detect the movement of external objects and convert it into an electrical signal for output.

[0031] In some embodiments, the signal processing module 2 includes a logic component 21, which changes the logic state through a pin to output normally open and normally closed modes. For example, the model of the logic component 21 can be SN74LVCEZ86DCKR. The logic can be changed through pin 4 of the logic component 21 of model SN74LVCEZ86DCKR, and pin 12 can be a same-direction signal or a reverse signal. Then, one output line can output normally open and normally closed modes. In a scenario where it is necessary to detect whether an object exists, the sensor can be set to output a normally open signal when the object exists, and output a normally closed signal when the object does not exist. This will not only improve the versatility of the sensor, but also enable it to adapt more flexibly to different application scenarios.

[0032] In some embodiments, the output of the output module 3 is in the form of an electrical signal, which may be a normally open signal, a normally closed signal, or a pulse signal. In scenarios where precise measurement of an object's speed is required, the sensor can be configured to output a pulse signal, and the object's speed can be calculated by measuring the frequency of the pulse signal. In simple scenarios where the presence of an object needs to be detected, the sensor can be configured to output a normally open or normally closed signal, which not only improves the sensor's practicality but also reduces user operational difficulty.

[0033] In some embodiments, the protection module 5 includes an anti-surge circuit 51. When a surge voltage enters the sensor, the anti-surge circuit 51 absorbs the surge voltage through its varistor and current-limiting resistor, preventing the surge voltage from damaging the sensor's internal components. The anti-surge circuit 51 includes a varistor and a current-limiting resistor. When a surge voltage enters the sensor, the varistor and current-limiting resistor quickly absorb and disperse harmful voltage fluctuations. For example, when a surge voltage is generated in the external environment, the varistor and current-limiting resistor quickly respond, absorbing and dispersing the surge voltage within the circuit, protecting the sensor's internal electronic components from damage. This not only improves the sensor's reliability and stability, but also extends its service life.

[0034] In some embodiments, the surge voltage is no greater than 200 V. That is, when the surge voltage is no greater than 200 V, the sensor can function normally and protect its internal electronic components from damage. For example, when the surge voltage generated by the external environment is less than 200 V, the sensor can function normally and output an accurate signal.

[0035] In some embodiments, the protection module 5 includes a short-circuit protection circuit 52, which is used to cut off or limit the current in the circuit when a short circuit occurs. For example, when a short circuit occurs in the internal or external circuit of the sensor, the short-circuit protection circuit 52 can respond quickly, cut off or limit the current, so as to prevent excessive current from damaging the electronic components inside the sensor. The short-circuit protection circuit 52 can be composed of a detection element, a control element, and an execution element. The detection element is used to detect whether the current in the circuit exceeds a preset threshold. When an abnormal current is detected, the control element triggers the execution element to act and cut off or limit the current. This allows the sensor to quickly cut off or limit the current when facing a short-circuit fault, effectively protecting the electronic components inside the sensor from damage, which not only improves the reliability and stability of the sensor, but also reduces the maintenance cost caused by short-circuit faults.

[0036] In some embodiments, the protection module 5 includes an overload protection circuit 53, which is used to disconnect the circuit when the load current in the circuit exceeds a preset safety value. The overload protection circuit 53 is used to disconnect the circuit when the load current in the circuit exceeds a preset safety value to prevent the electronic components inside the sensor from overheating or being damaged due to excessive current. For example, by detecting whether the load current in the circuit exceeds a preset safety value to determine whether to trigger the protection action, when the load current exceeds the safety value, the overload protection circuit 53 will cut off the circuit to protect the electronic components inside the sensor from damage. The overload protection circuit 53 can have a self-recovery function, that is, when the fault is eliminated, the circuit can automatically return to normal working state. By adopting the overload protection circuit 53, the circuit can be quickly cut off when the sensor faces an overload fault, effectively preventing the electronic components from overheating or being damaged due to excessive current, which not only improves the safety and reliability of the sensor, but also extends the service life of the sensor.

[0037] In some embodiments, the power module 4 includes an input voltage unit 41 and an LDO conversion unit 42. The input voltage of the input voltage unit 41 has a numerical range of 5V to 24V. The LDO conversion unit 42 is connected to the input voltage unit 41, and the above input voltage is converted into 3.3V through the LDO conversion unit 42. The LDO conversion unit 42 is respectively connected to the signal receiving module 1, the signal processing module 2 and the output module 3 to power the signal receiving module 1, the signal processing module 2 and the output module 3 through the LDO conversion unit 42.

[0038] The input voltage range of input voltage unit 41 is set to 5V to 24V to accommodate voltage requirements in different application scenarios. LDO conversion unit 42 converts the input voltage into a stable 3.3V output, providing stable power to signal receiving module 1, signal processing module 2, and output module 3, ensuring the sensor can function properly in various environments. In other words, through the power module 4 with LDO conversion unit 42, the sensor can provide a stable power supply under different voltage requirements.

[0039] In order to explain a device provided by the present invention in detail, the above embodiment 1 explains an interpolation slot-type photoelectric sensor in detail. Based on the same concept of the present invention, the present application also provides a device, as detailed in embodiment 2.

[0040] The second embodiment of the present invention provides a device, including the above-mentioned inserted slot-type photoelectric sensor. It may also include a shell for accommodating the above-mentioned inserted slot-type photoelectric sensor. The present invention provides a device, which is connected to the signal receiving module 1, the signal processing module 2 and the output module 3 respectively through the Power module 4, so as to power the signal receiving module 1, the signal processing module 2 and the output module 3 respectively through the Power module 4. The signal receiving module 1 is used to transmit and receive optical signals, and the signal processing module 2 is used to process the optical signals received by the signal receiving module 1 to convert the optical signals into electrical signals. The output module 3 is used to output the electrical signals converted by the signal processing module 2. The protection module 5 is connected to the Power module 4, and the protection module 5 is used to absorb surge voltage. In this way, after the signal receiving module 1 captures the changes in the external optical signal, it transmits the captured optical signal to the signal processing module 2 for conversion and processing. The signal processing module 2 will convert the optical signal into a corresponding electrical signal, and pass the converted electrical signal to the output module 3 for output for reading or processing by an external device. At the same time, Power module 4 provides stable power to signal receiving module 1, signal processing module 2, and output module 3, ensuring their normal operation. Furthermore, when a surge voltage intrudes, protection module 5 promptly absorbs and disperses harmful voltage fluctuations, effectively protecting the sensor's internal electronic components from damage. This improves resistance to light interference and surges, while minimizing sensor hysteresis.

[0041] Finally, it should be noted that the above specific implementation methods are only used to illustrate the technical solution of the utility model and are not limiting. Although the utility model is described in detail with reference to examples, ordinary technicians in this field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. An interpolation slot type photoelectric sensor, characterized in that: The inserted slot-type photoelectric sensor includes: a signal receiving module, a signal processing module, an output module, a power module and a protection module. The signal receiving module is used to transmit and receive optical signals; the signal processing module is used to process the optical signals received by the signal receiving module to convert the optical signals into electrical signals; the output module is used to output the electrical signals converted by the signal processing module; the power module is respectively connected to the signal receiving module, the signal processing module and the output module to supply power to the signal receiving module, the signal processing module and the output module respectively through the power module; the protection module is connected to the power module, and the protection module is used to absorb surge voltage.

2. The internal insertion slot photoelectric sensor according to claim 1, characterized in that: The signal receiving module includes an infrared emitting tube and an infrared receiving tube. The infrared emitting tube is used to emit infrared light, and the infrared receiving tube is used to receive the infrared light.

3. The internal insertion slot photoelectric sensor according to claim 1, characterized in that: The signal processing module includes: a logic component, and the logic component changes the logic state through the pin to output in a normally open mode or a normally closed mode.

4. The internal insertion slot photoelectric sensor according to claim 1, characterized in that: The output form of the output module is an electrical signal, and the electrical signal includes a normally open signal, a normally closed signal, or a pulse signal.

5. The internal insertion slot type photoelectric sensor according to claim 1, characterized in that: The protection module includes an anti-surge circuit, which is used to absorb the surge voltage through a varistor and a current-limiting resistor when the surge voltage enters the sensor.

6. The internal insertion slot photoelectric sensor according to claim 5, characterized in that: The surge voltage is no higher than 200V.

7. The internal insertion slot photoelectric sensor according to claim 1, characterized in that: The protection module includes a short-circuit protection circuit, which is used to cut off or limit current when a short circuit occurs.

8. The internal insertion slot photoelectric sensor according to claim 1, characterized in that: The protection module includes an overload protection circuit, which is used to disconnect the circuit when the load current in the circuit exceeds a preset safety value.

9. The internal insertion slot photoelectric sensor according to claim 1, characterized in that: The Power module includes: an input voltage unit and an LDO conversion unit connected to the input voltage unit, the input voltage of the input voltage unit has a numerical range of 5V to 24V; the LDO conversion unit converts the input voltage to 3.3V, and the LDO conversion unit is respectively connected to the signal receiving module, the signal processing module and the output module to power the signal receiving module, the signal processing module and the output module respectively through the LDO conversion unit.

10. A device, characterized in that: The device comprises: the internal insertion slot type photoelectric sensor according to any one of claims 1 to 9.

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