CN212459992U - Detection circuit and color sorter equipment - Google Patents
Detection circuit and color sorter equipment Download PDFInfo
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- CN212459992U CN212459992U CN202021650771.2U CN202021650771U CN212459992U CN 212459992 U CN212459992 U CN 212459992U CN 202021650771 U CN202021650771 U CN 202021650771U CN 212459992 U CN212459992 U CN 212459992U
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Abstract
An embodiment of the utility model provides a detection circuitry and look selection machine equipment relates to and detects technical field. The detection circuit comprises a controller and a plurality of light source modules, wherein each light source module comprises a light-emitting unit, a switch unit and a detection unit which are sequentially and electrically connected; the detection units of each light source module are electrically connected in sequence, and the first detection unit is electrically connected with the controller and the power supply; each switch unit is in a conducting state when the light-emitting unit works normally; when the light emitting unit is open-circuited, the light emitting unit is in a disconnected state; the first detection unit generates a first voltage when the switch unit is in a conducting state; generating a second voltage when the switching unit is in an off state; the second detection unit generates a third voltage when the switch unit is in a conducting state; generating a fourth voltage when the switching unit is in an off state; the controller judges whether the plurality of light-emitting units have the open-circuit light-emitting units according to the first voltage or the second voltage. The detection circuit can realize accurate open circuit detection.
Description
Technical Field
The utility model relates to a detect technical field, particularly, relate to a detection circuitry and look selection machine equipment.
Background
When the identification module of the color selection equipment adopts an infrared image acquisition device, the required infrared light source comprises a plurality of infrared driving modules, a plurality of infrared lamps connected in series are arranged in each infrared driving module, if one infrared lamp filament is broken, all the infrared lamps in one infrared driving module can not be on, and the color selection effect of the color selection equipment is influenced.
Because the color selection equipment is provided with a plurality of infrared driving modules, which infrared driving module has a fault can not be known through a human-computer interface or a remote control human-computer interface, and the color selection equipment can not be maintained and replaced in time.
SUMMERY OF THE UTILITY MODEL
The utility model aims at including, for example, provide a detection circuitry and look selection machine equipment, it can realize the accurate detection of opening a way.
The embodiment of the utility model discloses a can realize like this:
in a first aspect, an embodiment of the present invention provides a detection circuit, including a controller and a plurality of light source modules, where each of the light source modules includes a light emitting unit, a switch unit, and a detection unit, which are electrically connected in sequence; the detection units of each light source module are electrically connected in sequence, the first detection unit is electrically connected with the controller and the power supply, and the first detection unit is the last detection unit of the plurality of detection units which are electrically connected in sequence;
each switch unit is in a conducting state when the corresponding light-emitting unit works normally; when the corresponding light-emitting unit is in an open circuit, the light-emitting unit is in a disconnected state;
the first detection unit is used for generating a first voltage when a switch unit corresponding to the first detection unit is in a conducting state and transmitting the first voltage to the controller; the first detection unit is used for detecting the first voltage and the second voltage, and the first detection unit is used for detecting the second voltage;
the second detection unit is used for generating a third voltage when the switch unit corresponding to the second detection unit is in a conducting state and transmitting the third voltage to the third detection unit; the second detection unit is used for generating a second voltage when the switching unit corresponding to the second detection unit is in an off state and transmitting the second voltage to the third detection unit; the second detection unit is a non-last detection unit in a plurality of detection units which are electrically connected in sequence, and the third detection unit is the detection unit which is electrically connected with the output end of the second detection unit;
the controller is used for judging whether the plurality of light-emitting units have the open-circuit light-emitting units according to the first voltage or the second voltage.
In an optional embodiment, the first detection unit includes a first resistor and a second resistor, one end of the first resistor is electrically connected to both the second detection unit and the switch unit, which are electrically connected to the first detection unit, the other end of the first resistor is electrically connected to both the controller and one end of the second resistor, and the other end of the second resistor is electrically connected to the power supply.
In an optional embodiment, each of the second detection units includes a third resistor and a fourth resistor, one end of the third resistor is electrically connected to the fourth detection unit and the switch unit corresponding to the second detection unit, the other end of the third resistor is electrically connected to one end of the third detection unit and one end of the fourth resistor, and the other end of the fourth resistor is suspended; the fourth detection unit is electrically connected with the input end of the second detection unit.
In an optional embodiment, the first detection unit further includes a fifth resistor, and one end of the first resistor is electrically connected to the switch unit corresponding to the first detection unit through the fifth resistor.
In an optional embodiment, the second detection unit further includes a sixth resistor, and one end of the third resistor is electrically connected to the switch unit corresponding to the second detection unit through the sixth resistor.
In an optional embodiment, each of the switch units includes a first switch tube, a second switch tube and a seventh resistor, a first pin of the first switch tube is electrically connected to the corresponding light-emitting unit, a second pin of the first switch tube is electrically connected to the power supply through the seventh resistor, a first pin of the second switch tube is electrically connected between the second pin of the first switch tube and the seventh resistor, a second pin of the second switch tube is electrically connected to the corresponding detection unit, and a third pin of the first switch tube and a third pin of the second switch tube are both grounded;
the first switch tube is in a conducting state when the corresponding light-emitting unit works normally; when the corresponding light-emitting unit is open-circuited, the light-emitting unit is in a non-conducting state;
the second switch tube is in a non-conducting state when the first switch tube is in a conducting state; when the first switch tube is in a non-conducting state, the first switch tube is in a conducting state.
In an alternative embodiment, each of the light emitting units includes an infrared lamp and a thermistor, the infrared lamp and the thermistor are connected in series between the power supply and the ground, and the corresponding switch unit is electrically connected between the infrared lamp and the thermistor.
In an alternative embodiment, the infrared lamp is an infrared halogen lamp or an infrared led lamp.
In an optional embodiment, each of the light source modules further includes a connection unit, the first detection unit and the second detection unit are sequentially electrically connected through the connection unit, and the first detection unit is further electrically connected to the controller through the connection unit.
In a second aspect, an embodiment of the present invention provides a color sorter apparatus, including the detection circuit according to any one of the foregoing embodiments.
The utility model discloses beneficial effect includes, for example: a detection circuit and color sorter equipment, the detection circuit includes the controller and multiple light source modules, each light source module includes the light-emitting unit, switch unit and detecting element that are connected electrically sequentially; the detection units of each light source module are electrically connected in sequence, the first detection unit is electrically connected with the controller and the power supply, and the first detection unit is the last detection unit of the plurality of detection units which are electrically connected in sequence; each switch unit is in a conducting state when the corresponding light-emitting unit works normally; when the corresponding light-emitting unit is in an open circuit, the light-emitting unit is in a disconnected state; the first detection unit is used for generating a first voltage when the switch unit corresponding to the first detection unit is in a conducting state and transmitting the first voltage to the controller; the first detection unit is used for detecting the first voltage and the second voltage, and the first detection unit is used for detecting the second voltage; the second detection unit is used for generating a third voltage when the switch unit corresponding to the second detection unit is in a conducting state and transmitting the third voltage to the third detection unit; the second detection unit is used for generating a second voltage when the switching unit corresponding to the second detection unit is in an off state and transmitting the second voltage to the second detection unit; the second detection unit is the non-last one of the detection units which are electrically connected in sequence, and the third detection unit is a detection unit which is electrically connected with the output end of the second detection unit; the controller is used for judging whether the plurality of light-emitting units have the open-circuit light-emitting units according to the first voltage or the second voltage. Therefore, the detection units of each light source module are electrically connected in sequence, the controller can detect whether the light-emitting units with open circuits exist in the plurality of light-emitting units according to the voltage output by the first detection unit, and can judge which specific light-emitting unit is the light-emitting unit with the open circuit according to the voltage output by the first detection unit, so that the light-emitting units can be maintained and replaced in time, and the color sorting effect of the color sorter is ensured.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic structural diagram of a color sorter apparatus provided in an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a detection circuit according to an embodiment of the present invention;
fig. 3 is a schematic circuit diagram of a detection circuit according to an embodiment of the present invention;
fig. 4 is a schematic circuit diagram of another detection circuit provided in the embodiment of the present invention;
fig. 5 is a schematic structural diagram of another detection circuit according to an embodiment of the present invention.
Icon: 100-color sorter equipment; 110-a detection circuit; 111-a controller; 112-a light source module; 1121-a light emitting unit; 1122-a switching unit; 1123-a detection unit; 1124-a linking unit; 120-a power supply; 130-a communication module; 200-a human machine device; r1 — first resistance; r2 — second resistance; r3 — third resistance; r4-fourth resistor; r5-fifth resistor; r6-sixth resistance; r7 — seventh resistor; r8 — eighth resistance; r9 — ninth resistor; r10 — tenth resistance; q1-first switch tube; q2-second switch tube; an H-infrared lamp; RT-thermistor.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that, if the terms "upper", "lower", "inner", "outer", etc. indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the products of the present invention are used, the description is only for convenience of description and simplification, but the indication or suggestion that the indicated device or element must have a specific position, be constructed and operated in a specific orientation, and thus, should not be interpreted as a limitation of the present invention.
Furthermore, the appearances of the terms "first," "second," and the like, if any, are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
It should be noted that the features of the embodiments of the present invention may be combined with each other without conflict.
Referring to fig. 1, the present embodiment provides a schematic structural diagram of a color sorter apparatus 100, where the color sorter apparatus 100 includes a detection circuit 110 and a power supply 120, the power supply 120 is configured to supply power to the detection circuit 110, and the detection circuit 110 is configured to detect whether there is an open-circuited light-emitting unit, and determine which light-emitting unit has an open-circuit fault.
In this embodiment, the color sorter device 100 further includes a communication module 130, the detection circuit 110 is in communication connection with the human-machine device 200 through the communication module 130, the detection circuit 110 is configured to send the detection result to the human-machine device 200 through the communication module 130, and the human-machine device 200 stores and displays the detection result, so that a user can obtain the detection result in time and can replace the detection result in time when an open-circuit fault occurs in the light-emitting unit.
Fig. 2 is a schematic diagram of an implementation of the detection circuit 110 shown in fig. 1. The detection circuit 110 includes a controller 111 and a plurality of light source modules 112, each light source module 112 includes a light emitting unit 1121, a switch unit 1122 and a detection unit 1123 electrically connected in sequence; the detecting units 1123 of each light source module 112 are electrically connected in sequence, the first detecting unit is electrically connected with both the controller 111 and the power supply 120, and the first detecting unit is the last one of the plurality of detecting units 1123 electrically connected in sequence.
In the present embodiment, each switch unit 1122 is in a conducting state when the corresponding light emitting unit 1121 operates normally; when the corresponding light emitting unit 1121 is open, it is in an off state; the first detection unit is configured to generate a first voltage when the switch unit 1122 corresponding to the first detection unit is in a conducting state, and transmit the first voltage to the controller 111; and is further configured to generate a second voltage when the switch unit 1122 corresponding to the first detection unit is in an off state, and transmit the second voltage to the controller 111; the second detection unit is configured to generate a third voltage when the switch unit 1122 corresponding to the second detection unit is in a conducting state, and transmit the third voltage to the third detection unit; and also for generating a fourth voltage when the switching unit 1122 corresponding to the second detecting unit is in an off state, and transmitting the fourth voltage to the third detecting unit; the second detection unit is a non-last detection unit in the plurality of detection units 1123 which are electrically connected in sequence, and the third detection unit is the detection unit 1123 which is electrically connected with the output end of the second detection unit; the controller 111 is configured to determine whether the plurality of light emitting cells 1121 have open circuits according to the first voltage or the second voltage.
It is understood that, if the detection circuit 110 includes three light source modules 112, which are a light source module a, a light source module b, and a light source module c. The light source module a includes a light emitting unit a, a switching unit a, and a detecting unit a, the light source module b includes a light emitting unit b, a switching unit b, and a detecting unit b, and the light source module c includes a light emitting unit c, a switching unit c, and a detecting unit c.
The light-emitting unit a, the switch unit a and the detection unit a are electrically connected in sequence, the light-emitting unit b, the switch unit b and the detection unit b are electrically connected in sequence, and the light-emitting unit c, the switch unit c and the detection unit c are electrically connected in sequence. The detection unit a, the detection unit b and the detection unit c are electrically connected in sequence, and the detection unit c is also electrically connected with the controller 111 and the power supply 120. That is, the detecting unit c is a first detecting unit, and the detecting units a and b are second detecting units. The detecting unit b and the detecting unit c may be a third detecting unit, and when the detecting unit a is electrically connected to the detecting unit b, the detecting unit b is a detecting unit 1123 electrically connected to an output terminal of the detecting unit a, and corresponds to the detecting unit 1123 electrically connected to an output terminal of the second detecting unit. When the detection cell b is electrically connected to the detection cell c, the detection cell c is a detection cell 1123 electrically connected to the output terminal of the detection cell b, and corresponds to the detection cell 1123 electrically connected to the output terminal of the second detection cell.
And the switch unit a is in a conducting state when the light-emitting unit a works normally; when the light emitting unit a is open, it is in an off state. The switch unit b is in a conducting state when the light-emitting unit b works normally; when the light emitting unit b is open, it is in an off state. The switch unit c is in a conducting state when the light-emitting unit c works normally; when the light emitting unit c is open, it is in an off state.
The detection unit c is used for generating a first voltage when the switch unit c is in a conducting state and transmitting the first voltage to the controller 111; and also for generating a second voltage when the switching unit c is in an off state and transmitting the second voltage to the controller 111. The detection unit a is used for generating a third voltage when the switch unit a is in a conducting state and transmitting the third voltage to the detection unit b; and also for generating a fourth voltage when the switching unit a is in an off state and transmitting the fourth voltage to the detecting unit b. The detection unit b is used for generating a third voltage when the switch unit b is in a conducting state and transmitting the third voltage to the detection unit c; and also for generating a fourth voltage when the switching unit b is in an off state and transmitting the fourth voltage to the detecting unit c. The third voltage generated by the detecting unit a and the third voltage generated by the detecting unit b may be different voltage values, and the fourth voltage generated by the detecting unit a and the fourth voltage generated by the detecting unit b may also be different voltage values.
Since whether the light emitting cells 1121 are open-circuited affects the conducting state of the corresponding switch unit 1122, the conducting state of the switch unit 1122 affects the voltage generated by the corresponding detecting unit 1123, and the voltage generated by each detecting unit 1123 affects the voltage generated by the other detecting units 1123, the controller 111 can determine whether there is an open-circuited light emitting cell 1121 in the plurality of light emitting cells 1121 according to the first voltage generated by the first detecting unit and the second voltage.
For ease of understanding, please refer to fig. 3, which is a schematic diagram of an implementation of the detection circuit 110 shown in fig. 2. The first detection unit includes a first resistor R1 and a second resistor R2, one end of the first resistor R1 is electrically connected to the second detection unit and the switch unit 1122 which are electrically connected to the first detection unit, the other end of the first resistor R1 is electrically connected to the controller 111 and one end of the second resistor R2, and the other end of the second resistor R2 is electrically connected to the power supply 120.
It is understood that if the first sensing unit is the sensing unit c described above, one end of the first resistor R1 is electrically connected to both the sensing unit b and the switching unit c.
Each second detection unit comprises a third resistor R3 and a fourth resistor R4, one end of the third resistor R3 is electrically connected with the fourth detection unit and the switch unit 1122 corresponding to the second detection unit, the other end of the third resistor R3 is electrically connected with one end of the third detection unit and one end of the fourth resistor R4, and the other end of the fourth resistor R4 is suspended; the fourth detection unit is a detection unit 1123 electrically connected to the input terminal of the second detection unit.
It can be understood that if the second detecting unit is the detecting unit a and the detecting unit b, one end of the third resistor R3 in the detecting unit a is electrically connected to the switch unit a, the other end of the third resistor R3 in the detecting unit a is electrically connected to both the detecting unit b and one end of the fourth resistor R4, and the other end of the fourth resistor R4 in the detecting unit a is floating. One end of the third resistor R3 in the detecting unit b is electrically connected with the detecting unit a and the switch unit b, the other end of the third resistor R3 in the detecting unit b is electrically connected with the detecting unit c and one end of the fourth resistor R4, and the other end of the fourth resistor R4 in the detecting unit b is suspended.
Wherein the detecting unit a and the detecting unit b may serve as a fourth detecting unit. In other words, when the detecting unit a is electrically connected to the detecting unit b, the detecting unit a is the detecting unit 1123 electrically connected to the input terminal of the detecting unit b, and when the detecting unit b is electrically connected to the detecting unit c, the detecting unit b is the detecting unit 1123 electrically connected to the input terminal of the detecting unit c.
In the embodiment, the conducting states of the switch unit a, the switch unit b and the switch unit c affect the voltage division of the third resistor R3 in the detecting unit a, the third resistor R3 in the detecting unit b, the first resistor R1 in the detecting unit c and the second resistor R2 in the detecting unit c. That is, the third voltage and the fourth voltage generated by the second detection unit may affect the magnitude of the first voltage and the second voltage generated by the first detection unit.
As shown in fig. 3, each of the switch units 1122 includes a first switch tube Q1, a second switch tube Q2, and a seventh resistor R7, a first pin of the first switch tube Q1 is electrically connected to the corresponding light emitting unit 1121, a second pin of the first switch tube Q1 is electrically connected to the power source 120 through the seventh resistor R7, a first pin of the second switch tube Q2 is electrically connected between the second pin of the first switch tube Q1 and the seventh resistor R7, a second pin of the second switch tube Q2 is electrically connected to the corresponding detecting unit 1123, and a third pin of the first switch tube Q1 and a third pin of the second switch tube Q2 are both grounded.
In this embodiment, the first switch tube Q1 is in a conducting state when the corresponding light emitting unit 1121 operates normally; when the corresponding light emitting unit 1121 is open, it is in a non-conductive state; the second switch tube Q2 is in a non-conducting state when the first switch tube Q1 is in a conducting state; when the first switching tube Q1 is in the non-conducting state, it is in the conducting state.
It is understood that the circuit configuration of the switching unit 1122 of each light source module 112 is the same. If the detection circuit 110 includes three light source modules 112, which are a light source module a, a light source module b, and a light source module c, as described above. Then the first pin of the first switch Q1 of the switch unit a is electrically connected with the light emitting unit a, and the second pin of the second switch Q2 of the switch unit a is electrically connected with the detecting unit a. A first pin of the first switching tube Q1 of the switching unit b is electrically connected with the light emitting unit b, and a second pin of the second switching tube Q2 of the switching unit b is electrically connected with the detecting unit b. A first pin of the first switching tube Q1 of the switching unit c is electrically connected with the light emitting unit c, and a second pin of the second switching tube Q2 of the switching unit c is electrically connected with the detecting unit c.
Specifically, the second pin of the second switch Q2 of the switch unit a is electrically connected to one end of the third resistor R3 of the detection unit a, the second pin of the second switch Q2 of the switch unit b is electrically connected to one end of the third resistor R3 of the detection unit b, and the second pin of the second switch Q2 of the switch unit c is electrically connected to one end of the first resistor R1 of the detection unit c.
And the first switch tube Q1 of the switch unit a is in a conducting state when the light-emitting unit a works normally; when the light emitting unit a is open, it is in a non-conductive state. The first switching tube Q1 of the switching unit b is in a conducting state when the light emitting unit b normally works; when the light emitting unit b is open, it is in a non-conductive state. The first switching tube Q1 of the switching unit c is in a conducting state when the light emitting unit c normally works; when the light emitting unit c is open, it is in a non-conductive state.
Specifically, if each of the light emitting units 1121 operates normally, each of the second switching tubes Q2 is in a non-conducting state, the detecting unit c generates a first voltage, and the value of the first voltage is the voltage value provided by the power source 120. Since each of the second switch transistors Q2 is in a non-conducting state, the third resistor R3 and the first resistor R1 cannot divide the voltage with the second resistor R2. If the light emitting unit a is open, and the light emitting unit b and the light emitting unit c are normally operated, the second switch tube Q2 of the switch unit a is in a conducting state, the second switch tubes Q2 of the switch unit b and the switch unit c are both in a non-conducting state, the detecting unit c generates a second voltage, and the value of the second voltage is obtained by dividing the voltage provided by the power supply 120 by the sum of the third resistor R3 of the detecting unit a, the third resistor R3 of the detecting unit b and the first resistor R1 and the second resistor R2. That is, the value of the second voltage can be publicFormula Vout2＝Vvcc*(r1+2r3)/(r1+r2+2r3) Is calculated to obtain Vout2Is a second voltage, VvccVoltage supplied to the power supply 120, r1Is the resistance value, R, of the first resistor R12Is the resistance of the second resistor R2, 2R3Which is the sum of the resistance values of the third resistors R3 of the sensing unit a and the sensing unit b.
If the light emitting unit b is open, and the light emitting unit a and the light emitting unit c normally operate, the second switch tube Q2 of the switch unit b is in a conducting state, the second switch tubes Q2 of the switch unit a and the switch unit c are both in a non-conducting state, and the detection unit c generates the second voltage. Since the second switch Q2 of the switch unit b is in a conducting state and the second switch Q2 of the switch unit a and the switch unit c are both in a non-conducting state, the power source 120, the second resistor R2, the first resistor R1, the third resistor R3 of the detection unit b, and the second switch Q2 of the switch unit b form a path, and the value of the second voltage is obtained by dividing the voltage provided by the power source 120 by the sum of the third resistor R3 of the detection unit b and the first resistor R1 and by the second resistor R2. That is, the value of the second voltage can be represented by the formula Vout2＝Vvcc*(r1+r3)/(r1+r2+r3) Is calculated to obtain Vout2Is a second voltage, VvccVoltage supplied to the power supply 120, r1Is the resistance value, R, of the first resistor R12Is the resistance value, R, of the second resistor R23Is the resistance value of the third resistor R3 of the sensing unit b.
If the light emitting unit c is open, and the light emitting unit a and the light emitting unit b normally operate, the second switch tube Q2 of the switch unit c is in a conducting state, the second switch tubes Q2 of the switch unit a and the switch unit b are in a non-conducting state, and the detection unit c generates the second voltage. Since the second switch tube Q2 of the switch unit c is in a conducting state and the second switch tubes Q2 of the switch unit a and the switch unit b are in a non-conducting state, the power source 120, the second resistor R2, the first resistor R1 and the second switch tube Q2 of the switch unit c form a path, and the second voltage has a value of dividing the voltage provided by the power source 120 by the first resistor R1 and the second resistor R2And (4) obtaining. That is, the value of the second voltage can be represented by the formula Vout2＝Vvcc*r1/(r1+r2) Is calculated to obtain Vout2Is a second voltage, VvccVoltage supplied to the power supply 120, r1Is the resistance value, R, of the first resistor R12Is the resistance of the second resistor R2.
As shown in fig. 3, each of the light emitting units 1121 includes an infrared lamp H and a thermistor RT, the infrared lamp H and the thermistor RT are connected in series between the power supply 120 and the ground, and the corresponding switch unit 1122 is electrically connected between the infrared lamp H and the thermistor RT.
It is understood that the circuit structure of the light emitting unit 1121 of each light source module 112 is the same. If the detection circuit 110 includes three light source modules 112, which are a light source module a, a light source module b, and a light source module c, as described above. The switch unit a is electrically connected between the infrared lamp H and the thermistor RT of the light emitting unit a, the switch unit b is electrically connected between the infrared lamp H and the thermistor RT of the light emitting unit b, and the switch unit c is electrically connected between the infrared lamp H and the thermistor RT of the light emitting unit c. Specifically, the first pin of the first switch Q1 of the switch unit a is electrically connected between the infrared lamp H and the thermistor RT of the lighting unit a, the first pin of the first switch Q1 of the switch unit b is electrically connected between the infrared lamp H and the thermistor RT of the lighting unit b, and the first pin of the first switch Q1 of the switch unit c is electrically connected between the infrared lamp H and the thermistor RT of the lighting unit c.
In the present embodiment, the number of the infrared lamps H may be plural, and the plural infrared lamps H are electrically connected to the thermistor RT in sequence. Preferably, the data of the infrared lamps H may be set to 4.
The infrared lamp H is an infrared halogen lamp or an infrared led (Light Emitting Diode) lamp. Namely, the infrared lamp H can adopt an infrared halogen lamp and can also adopt an infrared led lamp. Since the infrared led lamp is too expensive, it is preferable that the infrared lamp H is an infrared halogen lamp.
In this embodiment, the principle of whether the open-circuit fault exists in the light emitting unit 1121 and affecting the on state of the switch unit 1122 is as follows: and taking the thermistor RT as a sampling resistor, and taking the voltage at two ends of the thermistor RT as a detection source for detecting whether the infrared lamp H has an open-circuit fault.
In order to ensure the operation stability and safety of the switch units 1122, as shown in fig. 3, each switch unit 1122 includes an eighth resistor R8, a ninth resistor R9 and a tenth resistor R10, a first pin of the first switch tube Q1 is electrically connected to the corresponding light emitting unit 1121 through the eighth resistor R8, the ninth resistor R9 is electrically connected between the first pin of the first switch tube Q1 and ground, and the tenth resistor R10 is electrically connected between the first pin of the second switch tube Q2 and ground. The eighth resistor R8, the ninth resistor R9 and the tenth resistor R10 are used for protecting the first switch tube Q1 and the second switch tube Q2.
The circuit configuration of the detection unit 1123 shown in fig. 3 can determine which light-emitting unit 1121 has an open failure only when one light-emitting unit 1121 has an open failure. However, when the open failure occurs in the plurality of light emitting cells 1121, it is only detected that the open failure occurs in the light emitting cells 1121, but it is not possible to determine which of the light emitting cells 1121 has the open failure. Therefore, as shown in fig. 4, for another schematic circuit diagram of the detection circuit 110 according to the present invention, the circuit structure of the detection unit 1123 shown in fig. 4 can determine which light-emitting units 1121 have an open-circuit fault when the light-emitting units 1121 have an open-circuit fault.
The circuit structure of the first detecting unit shown in fig. 4 further includes a fifth resistor R5 based on the circuit structure shown in fig. 3, and one end of the first resistor R1 is electrically connected to the switch unit 1122 corresponding to the first detecting unit through the fifth resistor R5.
It can be understood that if the first detecting unit is the detecting unit c, one end of the first resistor R1 is electrically connected to the switch unit c through the fifth resistor R5. Specifically, one end of the first resistor R1 is electrically connected to the second pin of the second switching tube Q2 of the switching unit c through the fifth resistor R5.
The circuit structure of the second detecting unit shown in fig. 4 further includes a sixth resistor R6 based on the circuit structure shown in fig. 3, and one end of the third resistor R3 is electrically connected to the switch unit 1122 corresponding to the second detecting unit through the sixth resistor R6.
It is understood that if the second sensing cells are the sensing cell a and the sensing cell b described above, one end of the third resistor R3 in the sensing cell a is electrically connected to the switching cell a through the sixth resistor R6 of the sensing cell a. One end of the third resistor R3 in the sensing unit b is electrically connected to the switching unit b through the sixth resistor R6 of the sensing unit b. Specifically, one end of the third resistor R3 in the detecting unit a is electrically connected to the second pin of the second switching tube Q2 of the switching unit a through the sixth resistor R6 of the detecting unit a. One end of the third resistor R3 in the detecting unit b is electrically connected to the second pin of the second switch Q2 of the switch unit b through the sixth resistor R6 of the detecting unit b.
In this embodiment, if the light emitting unit a and the light emitting unit b are open and the light emitting unit c is normally operated, the second switch tube Q2 of the switch unit a and the second switch tube Q2 of the switch unit b are both in a conducting state, the second switch tube Q2 of the switch unit c is in a non-conducting state, and the detecting unit c generates the second voltage. And the value of the second voltage is calculated through a path composed of the third resistor R3 and the sixth resistor R6 of the detecting unit a, the third resistor R3 and the sixth resistor R6 of the detecting unit b, the first resistor R1, the second resistor R2 and the power supply 120. That is, the third resistor R3 and the sixth resistor R6 of the sensing unit a are connected in parallel with the sixth resistor R6 of the sensing unit b, and the parallel impedance of the third resistor R3 and the sixth resistor R6 of the sensing unit a and the sixth resistor R6 of the sensing unit b is connected in series with the third resistor R3, the first resistor R1 and the second resistor R2 of the sensing unit b. Therefore, the value of the second voltage can be represented by formula Vout2＝Vvcc*(r1+r3+rz1)/(r1+r2+r3+rz1) Is calculated to obtainz1Is a parallel resistance value of the third resistor R3 and the sixth resistor R6 of the sensing unit a and the sixth resistor R6 of the sensing unit b.
If the light emitting unit a and the light emitting unit c are open and the light emitting unit b normally operates, the second switching tube Q2 of the switching unit a and the second switching tube Q2 of the switching unit c are both in a conducting state, the second switching tube Q2 of the switching unit b is in a non-conducting state, and the detecting unit c generates the second voltage. And the value of the second voltage passes through the third resistor R3 and the sixth resistor R6 of the detection unit aThe path composed of the third resistor R3 of the element b, the fifth resistor R5 of the detection unit c, the first resistor R1, the second resistor R2 and the power source 120 is calculated. That is, the third resistor R3 and the sixth resistor R6 of the detecting unit a, the third resistor R3 of the detecting unit b and the fifth resistor R5 of the detecting unit c are connected in parallel, and the parallel impedance of the third resistor R3 and the sixth resistor R6 of the detecting unit a, the third resistor R3 of the detecting unit b and the fifth resistor R5 of the detecting unit c is connected in series with the first resistor R1 and the second resistor R2. Therefore, the value of the second voltage can be represented by formula Vout2＝Vvcc*(r1+rz2)/(r1+r2+rz2) Is calculated to obtainz2The third resistor R3 and the sixth resistor R6 of the detecting unit a, and the third resistor R3 of the detecting unit b and the fifth resistor R5 of the detecting unit c are parallel resistance values.
It can be seen that, when the open-circuit fault condition occurs in different light-emitting units 1121, the second voltage value generated by the detecting unit c is different. The controller 111 may determine which specific ones of the light emitting cells 1121 have an open fault according to the acquired second voltage.
The principle of detecting the open circuit fault of the other light emitting units 1121 may refer to the above-mentioned embodiments, and will not be described herein again.
Referring to fig. 5, in order to provide another implementable structural schematic diagram of the detection circuit 110 according to the embodiment of the present invention, the detection circuit 110 shown in fig. 5 is based on the detection circuit 110 shown in fig. 2, and each light source module 112 further includes a connection unit 1124. The first detection unit and the second detection unit are electrically connected in turn by a connection unit 1124, and the first detection unit is also electrically connected to the controller 111 by the connection unit 1124.
It is understood that, if the detection circuit 110 includes three light source modules 112, which are a light source module a, a light source module b, and a light source module c, as described above, the light source module a further includes a connection unit a, the light source module b further includes a connection unit b, and the light source module c further includes a connection unit c.
The detection unit a is electrically connected with the detection unit b through the connection unit a, the detection unit b is electrically connected with the detection unit c through the connection unit b, and the detection unit c is electrically connected with both the controller 111 and the power supply 120 through the connection unit c.
It is understood that the other end of the third resistor R3 in the sensing unit a is electrically connected to one end of the third resistor R3 in the sensing unit b through the connection unit a, the other end of the third resistor R3 in the sensing unit b is electrically connected to one end of the first resistor R1 in the sensing unit c through the connection unit b, and the other end of the first resistor R1 in the sensing unit c is electrically connected to the controller 111 through the connection unit c. The other end of the second resistor R2 is electrically connected to the power supply 120 through a connection unit c.
In this embodiment, the resistances of the first resistor R1, the second resistor R2, the third resistor R3, the fourth resistor R4, the fifth resistor R5 and the sixth resistor R6 may be the same or different. For convenience of calculation, the resistances of the first resistor R1, the second resistor R2, the third resistor R3, the fourth resistor R4, the fifth resistor R5 and the sixth resistor R6 are preferably set to the same resistance.
In this embodiment, the first switch Q1 may be a triode, the second switch Q2 may be a mos (Metal Oxide Semiconductor field effect) transistor, and the connection unit 1124 may be a pin header.
The first pin of the first switch Q1 may be a base of a transistor, the second pin of the first switch Q1 may be a collector of the transistor, and the third pin of the first switch Q1 may be an emitter of the transistor. The first pin of the second switch Q2 may be a gate of a mos transistor, the second pin of the second switch Q2 may be a drain of the mos transistor, and the third pin of the second switch Q2 may be a source of the mos transistor.
To sum up, the embodiment of the present invention provides a detection circuit and a color sorter device, wherein the detection circuit includes a controller and a plurality of light source modules, and each light source module includes a light emitting unit, a switch unit and a detection unit which are electrically connected in sequence; the detection units of each light source module are electrically connected in sequence, the first detection unit is electrically connected with the controller and the power supply, and the first detection unit is the last detection unit of the plurality of detection units which are electrically connected in sequence; each switch unit is in a conducting state when the corresponding light-emitting unit works normally; when the corresponding light-emitting unit is in an open circuit, the light-emitting unit is in a disconnected state; the first detection unit is used for generating a first voltage when the switch unit corresponding to the first detection unit is in a conducting state and transmitting the first voltage to the controller; the first detection unit is used for detecting the first voltage and the second voltage, and the first detection unit is used for detecting the second voltage; the second detection unit is used for generating a third voltage when the switch unit corresponding to the second detection unit is in a conducting state and transmitting the third voltage to the third detection unit; the second detection unit is used for generating a second voltage when the switching unit corresponding to the second detection unit is in an off state and transmitting the second voltage to the second detection unit; the second detection unit is the non-last one of the detection units which are electrically connected in sequence, and the third detection unit is a detection unit which is electrically connected with the output end of the second detection unit; the controller is used for judging whether the plurality of light-emitting units have the open-circuit light-emitting units according to the first voltage or the second voltage. Therefore, the detection units of each light source module are electrically connected in sequence, the controller can detect whether the light-emitting units with open circuits exist in the plurality of light-emitting units according to the voltage output by the first detection unit, and can judge which specific light-emitting unit is the light-emitting unit with the open circuit according to the voltage output by the first detection unit, so that the light-emitting units can be maintained and replaced in time, and the color sorting effect of the color sorter is ensured.
The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. The detection circuit is characterized by comprising a controller and a plurality of light source modules, wherein each light source module comprises a light-emitting unit, a switch unit and a detection unit which are sequentially and electrically connected; the detection units of each light source module are electrically connected in sequence, the first detection unit is electrically connected with the controller and the power supply, and the first detection unit is the last detection unit of the plurality of detection units which are electrically connected in sequence;
each switch unit is in a conducting state when the corresponding light-emitting unit works normally; when the corresponding light-emitting unit is in an open circuit, the light-emitting unit is in a disconnected state;
the first detection unit is used for generating a first voltage when a switch unit corresponding to the first detection unit is in a conducting state and transmitting the first voltage to the controller; the first detection unit is used for detecting the first voltage and the second voltage, and the first detection unit is used for detecting the second voltage;
the second detection unit is used for generating a third voltage when the switch unit corresponding to the second detection unit is in a conducting state and transmitting the third voltage to the third detection unit; the second detection unit is used for generating a second voltage when the switching unit corresponding to the second detection unit is in an off state and transmitting the second voltage to the third detection unit; the second detection unit is a non-last detection unit in a plurality of detection units which are electrically connected in sequence, and the third detection unit is the detection unit which is electrically connected with the output end of the second detection unit;
the controller is used for judging whether the plurality of light-emitting units have the open-circuit light-emitting units according to the first voltage or the second voltage.
2. The detection circuit according to claim 1, wherein the first detection unit includes a first resistor and a second resistor, one end of the first resistor is electrically connected to both the second detection unit and the switch unit, which are electrically connected to the first detection unit, the other end of the first resistor is electrically connected to both the controller and one end of the second resistor, and the other end of the second resistor is electrically connected to the power supply.
3. The detection circuit according to claim 1, wherein each of the second detection units includes a third resistor and a fourth resistor, one end of the third resistor is electrically connected to the fourth detection unit and the switch unit corresponding to the second detection unit, the other end of the third resistor is electrically connected to one end of the third detection unit and one end of the fourth resistor, and the other end of the fourth resistor is floating; the fourth detection unit is electrically connected with the input end of the second detection unit.
4. The detection circuit according to claim 2, wherein the first detection unit further includes a fifth resistor, and one end of the first resistor is electrically connected to the switch unit corresponding to the first detection unit through the fifth resistor.
5. The detection circuit according to claim 3, wherein the second detection unit further includes a sixth resistor, and one end of the third resistor is electrically connected to the switch unit corresponding to the second detection unit through the sixth resistor.
6. The detection circuit according to claim 1, wherein each of the switch units includes a first switch tube, a second switch tube and a seventh resistor, a first pin of the first switch tube is electrically connected to the corresponding light-emitting unit, a second pin of the first switch tube is electrically connected to the power supply through the seventh resistor, a first pin of the second switch tube is electrically connected between the second pin of the first switch tube and the seventh resistor, a second pin of the second switch tube is electrically connected to the corresponding detection unit, and a third pin of the first switch tube and a third pin of the second switch tube are both grounded;
the first switch tube is in a conducting state when the corresponding light-emitting unit works normally; when the corresponding light-emitting unit is open-circuited, the light-emitting unit is in a non-conducting state;
the second switch tube is in a non-conducting state when the first switch tube is in a conducting state; when the first switch tube is in a non-conducting state, the first switch tube is in a conducting state.
7. The detection circuit according to claim 1, wherein each of the light emitting units includes an infrared lamp and a thermistor, the infrared lamp and the thermistor are connected in series between the power supply and ground, and the corresponding switch unit is electrically connected between the infrared lamp and the thermistor.
8. The detection circuit of claim 7, wherein the infrared lamp is an infrared halogen lamp or an infrared led lamp.
9. The detection circuit according to claim 1, wherein each of the light source modules further comprises a connection unit, the first detection unit and the second detection unit are electrically connected in sequence through the connection unit, and the first detection unit is further electrically connected to the controller through the connection unit.
10. A color selector device comprising a detection circuit as claimed in any one of claims 1 to 9.
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| CN202021650771.2U CN212459992U (en) | 2020-08-10 | 2020-08-10 | Detection circuit and color sorter equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021650771.2U CN212459992U (en) | 2020-08-10 | 2020-08-10 | Detection circuit and color sorter equipment |
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| CN212459992U true CN212459992U (en) | 2021-02-02 |
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