CN111661812A - Photoelectric sensor controller and filling equipment - Google Patents

Abstract

The embodiments of the present application provide a photoelectric sensor controller and a filling device, which solve the problems of easy interference of signals, low accuracy and poor reliability in the existing photoelectric sensor control mode. The photoelectric sensor controller includes: a photoelectric component, including a light-emitting device and a photosensitive device; a prism component configured to reflect light emitted by the light-emitting device to the photosensitive device; a controller, electrically connected to the photosensitive device, configured to The sensing signal of the photosensitive device generates a feedback signal.

Description

Photoelectric sensor controller and filling equipment

technical field

The present application relates to the technical field of electronic communication, in particular to a photoelectric sensor controller and a filling device.

Background technique

In the field of filling control technology, the ground full quantitative gas extrusion filling method is usually used. Whether the filling control system can obtain accurate liquid level signals in real time plays a crucial role in the accurate quantification of propellant. With the continuous development of measurement and control technology, the use of a combination of photoelectric sensor modules and photoelectric conversion modules to feedback liquid level signals has become an optional photoelectric sensor control method.

At present, the photoelectric signal conversion device based on the combination of photoelectric sensor module and photoelectric conversion module mainly has the following four problems: 1. The external DC power supply directly supplies power to the core device, and the fluctuation of the external power supply interferes with the internal circuit, and it is easy to output wrong signals; 2. Between the photoelectric sensor module and the photoelectric conversion module, a cable of more than 200 meters needs to carry out the transmission of micro-ampere current, which is easy to introduce external electromagnetic interference through the cable and output false signals. Third, the photoelectric conversion module printed board is placed in the filler In the console, the action of the surrounding high-current switching equipment may bring electromagnetic radiation interference to the photoelectric conversion circuit and output false signals; Fourth, the electromagnetic relay module is used in the photoelectric conversion module, and the mechanical contact brings hidden dangers to the reliability of the single machine.

SUMMARY OF THE INVENTION

In view of this, the embodiments of the present application provide a photoelectric sensor controller and a filling device, which solve the problems of easy signal interference, low accuracy and poor reliability in the existing photoelectric sensor control method.

According to an aspect of the present application, an embodiment of the present application provides a photoelectric sensor controller including: a photoelectric component, including a light-emitting device and a photosensitive device; a prism component configured to reflect light emitted by the light-emitting device to the photosensitive device a controller, electrically connected to the photosensitive device, and configured to generate a feedback signal according to the sensing signal of the photosensitive device.

In an embodiment of the present application, the light-emitting device includes an infrared light-emitting diode, and the photosensitive device includes a phototransistor; wherein the controller is further configured to generate a feedback signal according to the conductivity of the phototransistor.

In an embodiment of the present application, the controller includes: a sampling resistor; a comparator configured to: output a high level when the voltage on the sampling resistor is greater than a preset value, and when the voltage on the sampling resistor is greater than a preset value outputting a low level when the value is smaller than a preset value; and a relay electrically connected to the comparator, configured to: when the comparator outputs a high level, generate a filling stop feedback signal, and when the comparator outputs a low level , which generates an injection execution feedback signal.

In an embodiment of the present application, the relay includes a solid state relay.

In an embodiment of the present application, the light-emitting device and the photosensitive device are arranged side by side; wherein, the light output end of the light-emitting device and the optical receiving end of the photosensitive device are arranged side by side, and the prism assembly is arranged on the One side of the light output end of the light-emitting device and the optical receiving end of the photosensitive device.

In an embodiment of the present application, the photoelectric sensor controller further includes: a metal casing, wherein part or all of the optoelectronic components are arranged in the metal casing.

In an embodiment of the present application, the photoelectric sensor controller further includes: a power supply component for providing power supply to the photoelectric component; wherein, the power supply component includes a voltage regulator chip configured to convert an external power supply voltage is a safety voltage, wherein the safety voltage is lower than the external power supply voltage.

In an embodiment of the present application, the voltage regulator chip includes a three-terminal voltage regulator chip.

In an embodiment of the present application, the external power supply voltage is a 24V DC voltage, and the safety voltage is a 12V DC voltage.

According to another aspect of the present application, an embodiment of the present application provides a filling device, a filling tank is configured to store propellant; a filling and draining connector is configured to connect the filling tank and the draining of the storage tank. and an overflow connector, which is arranged at the exhaust port of the storage tank; wherein, the liquid chamber of the draining connector and the liquid chamber of the overflow connector are respectively provided with one according to claim 1. Photoelectric sensor controller.

The embodiment of the present application provides a photoelectric sensor controller and a filling device, which adopts an integrated design for the controller and photoelectric components. Compared with the existing photoelectric sensor control method, the photoelectric sensor module and photoelectric conversion are cancelled. More than 200 meters of long-distance transmission cables for microamp-level current between modules, short wire bundles can be used for electrical connection between the light-emitting device and the photosensitive device, which reduces the electromagnetic conduction interference injected into the circuit system through the cable, avoids outputting false signals, and improves the The signal accuracy rate is high, and the reliability is high.

Description of drawings

FIG. 1 is a schematic structural diagram of a photoelectric sensor controller according to an embodiment of the present application.

FIG. 2 is a schematic diagram of a circuit structure of a photoelectric sensor controller according to an embodiment of the present application.

FIG. 3 is a schematic structural diagram of a photoelectric sensor controller according to another embodiment of the present application.

4a and 4b are schematic diagrams showing the working principle of a photoelectric sensor controller according to an embodiment of the present application.

Detailed ways

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

FIG. 1 is a schematic structural diagram of a photoelectric sensor controller according to an embodiment of the present application. As shown in FIG. 1 , the photoelectric sensor controller includes: a photoelectric component 11 , a prism component 12 and a controller 13 .

The optoelectronic component 11 includes a light emitting device 111 and a photosensitive device 112 . The prism assembly 12 is configured to reflect the light emitted by the light emitting device 111 to the photosensitive device 112 . The controller 13 is electrically connected to the photosensitive device 112 and is configured to generate a feedback signal according to a sensing signal of the photosensitive device 112 .

Specifically, the light-emitting device 111 may include an infrared light-emitting diode, and the light-emitting device 112 may include a phototransistor. The controller 13 may be further configured to generate a feedback signal according to the conductivity of the phototransistor. The light-emitting device 111 emits infrared light with constant brightness, and the photosensitive device 112 is used for sensing the infrared light reflected back by the prism assembly 12 . The photoelectric sensor controller is based on the above principles to complete the transmission of photoelectric signals, so as to realize the discrimination of the medium environment.

In an embodiment of the present application, as shown in FIG. 2 , the controller 13 may specifically include: a sampling resistor R4 , a comparator N, and a relay K1 electrically connected to the comparator N. The comparator N is configured to output a high level when the voltage on the sampling resistor is greater than the preset value, and output a low level when the voltage on the sampling resistor is smaller than the preset value. When the photoelectric sensor controller is placed in the liquid chamber of the draining connector, the relay K1 is configured to: when the comparator N outputs a high level, it will generate a filling stop feedback signal; when the comparator N outputs a low level, it will generate a charging stop feedback signal. Note the execution feedback signal. When the photoelectric sensor controller is placed in the liquid chamber of the overflow connector, the relay K1 is configured to: when the comparator N outputs a high level, it generates a filling execution feedback signal; when the comparator N outputs a low level, it generates a filling Stop the feedback signal.

It can be seen from this that the photoelectric sensor controller provided by the embodiment of the present application adopts an integrated design for the controller 13 and the photoelectric component 11. Compared with the existing photoelectric sensor control method, the photoelectric sensor module and the photoelectric sensor module are eliminated. More than 200 meters of long-distance transmission cables for microamp-level current between the photoelectric conversion modules, and short wire bundles can be used to electrically connect the controller 13 and the photoelectric components 11, which reduces the electromagnetic conduction interference injected into the circuit system through the cable and avoids output Error signal, improve signal accuracy, high reliability.

In an embodiment of the present application, the relay includes a solid state relay. The use of smaller solid-state relays can reduce the size of the overall device and at the same time remove the mechanical contacts, eliminate the hidden dangers caused by contact failures, and effectively improve the reliability of the single unit.

In an embodiment of the present application, the photoelectric sensor controller may further include: a power supply component for providing power supply to the photoelectric component 11 . Specifically, the power supply assembly includes a voltage regulator chip configured to convert an external power supply voltage (eg, 24V DC voltage) into a safe voltage (eg, 12V DC voltage), wherein the safe voltage is lower than the external power supply voltage. Using a voltage regulator chip to supply power to the optoelectronic component 11 can effectively reduce the risk of interference to the internal circuit caused by fluctuations in the external power supply. In a further embodiment, the voltage regulator chip can be a three-terminal voltage regulator chip.

In an embodiment of the present application, in order to save internal space and improve the degree of integration, the light emitting device 111 and the photosensitive device 112 may be arranged side by side. The light output end of the light emitting device 111 and the optical receiving end of the photosensitive device 112 are arranged side by side.

In an embodiment of the present application, as shown in FIG. 2 , the photoelectric sensor controller may further include: a metal casing, wherein part or all of the photoelectric components 11 are arranged in the metal casing. This can effectively reduce the electromagnetic interference caused by external electromagnetic radiation to the internal circuit.

In an embodiment of the present application, as shown in FIG. 3 , the photoelectric sensor controller may further include: a cover 31 , a protective cover 32 , an O-ring 33 / 34 , an outer nut 35 , a socket 36 , a casing 37 and Prism 38. The O-ring 33 plays a sealing role to prevent the liquid medium from entering the gap between the prism 38 and the photoelectric component 11 during use, which affects the photoelectric sensor controller's judgment of the state of the external medium; the O-ring 34 also plays a sealing role to prevent the use of The liquid medium in the liquid cavity of the connector seeps out from the gap between the mounting hole on the connector and the housing 37 of the photoelectric sensor controller.

Based on the photoelectric sensor controller shown in Figure 3, the photoelectric sensor controller is used as follows: first, the photoelectric sensor controller is installed on the connector, and the connector is used to connect the filling tank and the storage tank. Specifically, remove the photoelectric sensor installation port blocking cap, install the photoelectric sensor controller that has passed the joint test with the filling signal table (box) on the connector installation port, remove the photoelectric sensor controller cover 31 before installation, Tighten the outer nut 35 with a wrench, and then connect the filling level signal cable to the socket 36 of the photoelectric sensor controller. After the photoelectric sensor is connected to the connector, check the air tightness of the whole system together with the connector before filling, and start filling after passing the test.

During the filling process, when the prism assembly 12 of the photoelectric sensor controller is in the gas phase state, the infrared light emitted by the infrared light-emitting diode shines on the interface between the prism glass and the air, and most of the light (as indicated by the arrow in Figure 4a) ) is reflected to the phototransistor, the conductivity of the phototransistor is large, and its photocurrent is large. When the voltage on the sampling resistor R4 in the circuit in Figure 2 is far greater than the threshold voltage value set by the comparator, the comparator output tube The pin outputs a high level, and the solid state relay outputs a disconnection signal and feeds it back to the filling control system.

When the prism assembly 12 of the photoelectric sensor controller is in the liquid state, the infrared light emitted by the infrared light-emitting diode shines on the interface between the prism glass and the air, and most of the infrared light is refracted into the liquid at this time, and only a small part ( As indicated by the arrow in Figure 4b) the light is reflected to the phototransistor, the conductivity of the phototransistor is small, and its dark current is very small, the voltage on the sampling resistor R4 in the circuit in Figure 2 is far less than the threshold voltage value set by the comparator When the output pin of the comparator outputs a low level, the solid state relay outputs a conduction signal and feeds it back to the filling control system.

An embodiment of the present application further provides a filling device, the filling device includes a filling tank, a filling and draining connector, and an overflowing connector. Specifically, the refill tank is configured to store propellant, the refill connector is configured to connect the refill tank and the refill port of the storage tank, the overflow connector is arranged at the exhaust port of the tank, and the liquid cavity of the refill connector is configured A photoelectric sensor controller as described in any of the previous embodiments is respectively arranged in the liquid chamber of the overflow connector.

The operation steps of the filling equipment are as follows: after starting the filling process, squeeze nitrogen into the air pillow part of the filling tank. In the add-drain connector of the tank add-drain port. When the photoelectric sensor controller in the liquid cavity of the filling and draining connector detects that there is liquid passing through, it will send a signal to the filling control system, the filling liquid level light will be on, and the external metering equipment will be controlled to reset to zero, and the external metering equipment will start to measure the filling amount. . During the filling process, if the propellant does not reach the overflow connector of the tank exhaust port, the photoelectric sensor controller in the liquid chamber of the overflow connector detects that liquid has passed, and sends a signal to the filling control system. , the liquid level light of the exhaust port is on, and the program controls all open valves to close, but the filling procedure is still running normally. After analyzing and dealing with the problem, decide whether to reset the filling procedure. When the filling amount is reached, the filling control system automatically stops the filling process. After the filling process is completed, screw on the socket plug of the photoelectric sensor controller, and then neutralize, clean and dry. Be careful not to let the neutralized liquid enter the socket and avoid bumping the prism assembly 12.

The basic principles of the present application have been described above in conjunction with specific embodiments. However, it should be pointed out that the advantages, advantages, effects, etc. mentioned in the present application are only examples rather than limitations, and these advantages, advantages, effects, etc., are not considered to be Required for each embodiment of this application. In addition, the specific details disclosed above are only for the purpose of example and easy understanding, rather than limiting, and the above-mentioned details do not limit the application to be implemented by using the above-mentioned specific details.

The block diagrams of devices, apparatus, apparatuses, and systems referred to in this application are merely illustrative examples and are not intended to require or imply that the connections, arrangements, or configurations must be in the manner shown in the block diagrams. As those skilled in the art will appreciate, these means, apparatuses, apparatuses, systems may be connected, arranged, configured in any manner. Words such as "including", "including", "having" and the like are open-ended words meaning "including but not limited to" and are used interchangeably therewith. As used herein, the words "or" and "and" refer to and are used interchangeably with the word "and/or" unless the context clearly dictates otherwise. As used herein, the word "such as" refers to and is used interchangeably with the phrase "such as but not limited to".

It should also be pointed out that, in the apparatus and equipment of the present application, various components can be disassembled and/or reassembled. These disaggregations and/or recombinations should be considered as equivalents of the present application.

The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use this application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other aspects without departing from the scope of the application. Therefore, this application is not intended to be limited to the aspects shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

The foregoing description has been presented for the purposes of illustration and description. Furthermore, this description is not intended to limit the embodiments of the application to the forms disclosed herein. Although a number of example aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, changes, additions and sub-combinations thereof.

The above descriptions are only preferred embodiments of the present application, and are not intended to limit the present application. Any modifications, equivalent replacements, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application. within.

Claims (10)

1. a photoelectric sensor controller, is characterized in that, comprises: Optoelectronic components, including light-emitting devices and photosensitive devices; a prism assembly configured to reflect light emitted by the light-emitting device to the photosensitive device; A controller, electrically connected to the photosensitive device, is configured to generate a feedback signal according to a sensing signal of the photosensitive device. 2. The photoelectric sensor controller according to claim 1, wherein the light-emitting device comprises an infrared light-emitting diode, and the photosensitive device comprises a phototransistor; Wherein, the controller is further configured to generate a feedback signal according to the conductivity of the phototransistor. 3. The photoelectric sensor controller according to claim 2, wherein the controller comprises: sampling resistance; a comparator configured to: output a high level when the voltage on the sampling resistor is greater than a preset value, and output a low level when the voltage on the sampling resistor is smaller than a preset value; and The relay electrically connected to the comparator is configured to generate a filling stop feedback signal when the comparator outputs a high level, and generate a filling execution feedback signal when the comparator outputs a low level. 4. The photoelectric sensor controller according to claim 3, wherein the relay comprises a solid state relay. 5. The photoelectric sensor controller according to any one of claims 1 to 4, wherein the light-emitting device and the photosensitive device are arranged side by side; Wherein, the light output end of the light emitting device and the optical receiving end of the photosensitive device are arranged side by side, and the prism assembly is arranged on one side of the light output end of the light emitting device and the optical receiving end of the photosensitive device. 6. The photoelectric sensor controller according to any one of claims 1 to 4, characterized in that, further comprising: A metal casing, wherein part or all of the optoelectronic components are arranged in the metal casing. 7. The photoelectric sensor controller according to any one of claims 1 to 4, further comprising: a power supply assembly for providing power supply to the photoelectric assembly; Wherein, the power supply component includes a voltage regulator chip configured to convert an external power supply voltage into a safe voltage, wherein the safe voltage is lower than the external power supply voltage. 8 . The photoelectric sensor controller according to claim 7 , wherein the voltage regulator chip comprises a three-terminal voltage regulator chip. 9 . 9 . The photoelectric sensor controller according to claim 7 , wherein the external power supply voltage is a 24V DC voltage, and the safety voltage is a 12V DC voltage. 10 . 10. A filling device, characterized in that it comprises: a refill tank configured to store propellant; a fill-drain connector configured to connect the fill tank and the fill-drain port of the tank; and an overflow connector, provided at the exhaust port of the tank; Wherein, a photoelectric sensor controller according to claim 1 is respectively arranged in the liquid cavity of the draining connector and the liquid cavity of the overflow connector.

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