Detection circuit and cleaning robot workstation

Abstract

The utility model relates to a detection circuit and a cleaning robot workstation, the detection circuit comprises a water level detection module and a sampling module, and the water level detection module has at least one electrical characteristic parameter corresponding to the water level so as to detect at least one water level; the sampling module is connected with the two ends of the water level detection module through an electric connection assembly and used for providing electric energy to collect voltage at the two ends of the water level detection module. The voltage corresponds to the water level and is further used for representing the connection state of the electric connection assembly; the connection state comprises short-circuit connection and normal connection, and the short-circuit connection refers to short circuit of the two ends of the electric connection assembly connected with the water level detection module or the sampling module. According to the detection circuit, multiple water levels can be detected, the connection state of the electric connection assembly can be detected, and normal operation of the circuit is ensured.

Description

Technical Field

[0001] The present application relates to the technical field of detection circuits, and in particular to detection circuits and cleaning robot workstations. Background Art

[0002] In the field of detection circuit technology, common detection circuits include water level detection circuits. The water level detection circuit usually uses a water level detection module to detect the water level, and collects the corresponding water level signal through a sampling circuit, thereby realizing water level detection.

[0003] For the detachable detection method, the water level detection circuit and the sampling circuit are usually connected through an electrical connection component. However, the existing detection circuit cannot detect the connection status of the electrical connection component, which can easily cause circuit failure when a short circuit occurs in the electrical connection component. Utility Model Content

[0004] Based on this, it is necessary to provide a detection circuit and a cleaning robot workstation that can detect the connection status of electrical connection components in order to solve the above technical problems.

[0005] In a first aspect, the present application provides a detection circuit, comprising:

[0006] A water level detection module, having at least one electrical characteristic parameter corresponding to the water level, so as to detect at least one water level;

[0007] A sampling module is connected to the two ends of the water level detection module through an electrical connection component, and is used to provide electrical energy to collect the voltage at the two ends of the water level detection module; the voltage corresponds to the electrical characteristic parameter, and the voltage is also used to characterize the connection state of the electrical connection component; the connection state includes a short-circuit connection and a normal connection, and the short-circuit connection is a conductive connection between the two ends of the electrical connection component and the water level detection module or the electrical connection component and the sampling module.

[0008] In one embodiment, the sampling module includes:

[0009] A unidirectional conducting unit, wherein the conducting end and the cutting end of the unidirectional conducting unit are respectively connected to the two ends of the sampling module and the two ends of the water level detection module, the conducting end of the unidirectional conducting unit is also used to connect to the power supply, and the unidirectional conducting unit is used to conduct when the electrical connection component is short-circuited, so that the difference between the voltage and the power supply voltage provided by the power supply is less than or equal to a preset threshold value;

[0010] A constant current source unit, connected to two ends of the water level detection module through the electrical connection component;

[0011] A sampling unit, two ends of which are respectively connected to the constant current source unit and the water level detection module, for acquiring the voltage.

[0012] In one embodiment, the constant current source unit comprises:

[0013] A first voltage-dividing component, wherein a first end of the first voltage-dividing component is connected to the conducting end of the unidirectional conducting unit and is connected to one end of the water level detecting module through one end of the electrical connecting component, and a second end of the first voltage-dividing component is used to connect to an equivalent ground end;

[0014] A second voltage-dividing component, wherein a first end of the second voltage-dividing component is connected to the cut-off end of the unidirectional conductive unit and is connected to the other end of the water level detection module through the other end of the electrical connection component, and a second end of the second voltage-dividing component is used to connect to an equivalent ground end;

[0015] A comparison component, wherein a first input terminal of the comparison component is connected to a third terminal of the first voltage-dividing component, a second input terminal of the comparison component is connected to a third terminal of the second voltage-dividing component, and an output terminal of the comparison component is connected to a fourth terminal of the second voltage-dividing component.

[0016] In one embodiment, the second voltage dividing component includes:

[0017] a first switch element, wherein a first conducting end of the first switch element is connected to a conducting end of the unidirectional conducting unit, and is connected to another end of the water level detection module through another end of the electrical connection component;

[0018] A first resistance element, wherein two ends of the first resistance element are respectively connected to the output end of the comparison component and the controlled end of the first switch element;

[0019] A second resistance element, wherein two ends of the second resistance element are respectively connected to the second input end of the comparison component and the second conduction end of the first switch element;

[0020] A third resistance element, wherein two ends of the third resistance element are respectively connected to the second conduction end and the equivalent ground end of the first switch element.

[0021] In one embodiment, the electrical characteristic parameter includes resistance; and the water level detection module includes:

[0022] At least one sensor unit, used to output a switch signal corresponding to the water level;

[0023] At least one resistance component is connected to at least one of the sensor units and is connected to the sampling module through the electrical connection component, and is used to have a resistance corresponding to the water level when receiving the switch signal.

[0024] In one embodiment, the water level detection module is used to detect n water levels, where n is a positive integer, the number of the resistor component is one, and the resistor component includes:

[0025] A current limiting resistor and n water level detection resistors, wherein the current limiting resistor and each of the water level detection resistors are connected in series, and both ends of the series-connected current limiting resistor and the water level detection resistor are connected to the sampling module through the electrical connection component; the resistance values ​​of the n water level detection resistors are different;

[0026] n second switch elements, the n second switch elements are connected in parallel with the n water level detection resistors in a one-to-one correspondence and are connected to at least one of the sensor units, and the second switch elements are used to be turned on when receiving the switch signal.

[0027] In one embodiment, the sensor unit comprises a float sensor.

[0028] In one embodiment, it also includes:

[0029] A main control module, wherein the main control module is provided with an ADC interface, the main control module is connected to the sampling module via the ADC interface, and performs analog-to-digital conversion on the voltage via the ADC interface, so that the main control module determines the water level and the connection status of the electrical connection component via the voltage after the analog-to-digital conversion.

[0030] In one embodiment, the electrical connection assembly includes two connectors, and the two connectors are electrically connected to two ends of the water level detection module and two ends of the sampling module in a one-to-one correspondence; or,

[0031] The electrical connection assembly includes two contacts, and the two contacts are electrically connected to two ends of the water level detection module and two ends of the sampling module in a one-to-one correspondence.

[0032] In a second aspect, the present application also provides a cleaning robot workstation, comprising:

[0033] Water tank;

[0034] As in the detection circuit mentioned above, the water level detection module of the detection circuit is arranged in the water tank to detect the water level of the water tank.

[0035] The above detection circuit and cleaning robot workstation include a water level detection module and a sampling module. The water level detection module has at least one electrical characteristic parameter corresponding to the water level to detect at least one water level; the sampling module is connected to the two ends of the water level detection module through an electrical connection component, and is used to provide electrical energy to collect the voltage at the two ends of the water level detection module; the voltage corresponds to the water level, and the voltage is also used to characterize the connection state of the electrical connection component; the connection state includes a short circuit connection and a normal connection, and the short circuit connection is a short circuit between the two ends of the electrical connection component and the water level detection module or the sampling module. In this application, the voltage at the two ends of the water level detection module is collected by the sampling module. Since the water level detection module has an electrical characteristic parameter corresponding to the water level, the voltage collected by the sampling module is different when the water level is different. Based on this, the detection circuit of the present application can detect multiple water levels. In addition, since the sampling module is connected to the two ends of the water level detection module through the electrical connection component, the voltage collected by the sampling module at this time can also characterize the connection status of each port of the electrical connection component. Under normal connection conditions, the electrical connection component makes the circuit between the sampling module and the water level detection module conductive; when the electrical connection component is abnormal and short-circuited, the two ends of the electrical connection component connected to the sampling module are conductive and short-circuited, or the two ends of the electrical connection component connected to the water level detection module are conductive and short-circuited. Therefore, the voltage collected by the sampling module can also characterize the connection status of the electrical connection component, thereby ensuring the normal operation of the circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the present application or related technologies, the drawings required for use in the embodiments of the present application or related technical descriptions will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0037] Figure 1 This is one of the structural schematic diagrams of the detection circuit in one embodiment of the present application;

[0038] Figure 2 This is a schematic diagram of the structure of a sampling module in an embodiment of the present application;

[0039] Figure 3 is a structural schematic diagram of a constant current source unit in an embodiment of the present application;

[0040] Figure 4 This is a schematic diagram of the structure of a second voltage-dividing component in one embodiment of the present application;

[0041] FIG5 (a) is a schematic diagram of a resistor component connected to a sensor unit in an embodiment of the present application;

[0042] FIG5( b ) is a schematic diagram of connecting a plurality of resistor components to a sensor unit in an embodiment of the present application;

[0043] FIG5( c ) is a schematic diagram showing a resistor component connected to a plurality of sensor units in one embodiment of the present application;

[0044] FIG5( d ) is a schematic diagram showing that a plurality of resistor components are respectively connected to a plurality of sensor units in an embodiment of the present application;

[0045] Figure 6 is a schematic diagram of the structure of a resistor component in an embodiment of the present application;

[0046] Figure 7 This is a second structural diagram of a detection circuit in an embodiment of the present application;

[0047] Figure 8 This is a third structural diagram of a detection circuit in an embodiment of the present application;

[0048] Fig. 9 Schematic diagram of the structure of a cleaning robot workstation in one embodiment of the present application.

[0049] Description of Figure Numbers:

[0050] Cleaning robot workstation: 10; water level detection module: 110; sensor unit: 111; float sensor: 1111; resistor component: 112; current limiting resistor: 1121; water level detection resistor: 1122; second switch element: 1123; sampling module: 120; unidirectional conduction unit: 121; constant current source unit: 122; first voltage divider component: 1221; second voltage divider component: 1222; first switch element: 410; first resistor element: 420; second resistor element: 430; third resistor element: 440; comparison component: 1223; sampling unit: 123; electrical connection component: 130; main control module: 140; ADC interface: 141; microprocessor: 142; water tank: 200. DETAILED DESCRIPTION

[0051] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0052] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0053] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0054] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0055] In one embodiment, see Figure 1 , Figure 1 One of the structural schematic diagrams of the detection circuit in an embodiment of the present application is shown. The water level detection circuit provided in this embodiment includes a water level detection module 110 and a sampling module 120. The water level detection module has at least one electrical characteristic parameter corresponding to the water level to detect at least one water level; the sampling module 120 is connected to both ends of the water level detection module 110 through an electrical connection component 130, which is used to provide electrical energy to collect the voltage at both ends of the water level detection module 110; the voltage corresponds to the electrical characteristic parameter, and the voltage is also used to characterize the connection state of the electrical connection component 130; the connection state includes a short-circuit connection and a normal connection, and the short-circuit connection is a short circuit between the two ends of the electrical connection component 130 and the water level detection module 110 or the electrical connection component 130 and the sampling module 120.

[0056] Among them, the water level detection module 110 refers to a circuit or module that can detect the water level and has electrical characteristic parameters corresponding to the water level according to the different water levels. Electrical characteristic parameters include but are not limited to resistance, capacitance and inductance. Exemplarily, the water level detection module 110 includes at least one sensor, which can change its own resistance or other electrical characteristic parameters, such as capacitance and inductance, according to the change of the water level, so that the resistance or other electrical characteristic parameters are collected by the sampling module 120 and converted into voltage, thereby realizing the identification of the water level. Specifically, these sensors work by measuring the changes in electrical characteristic parameters (such as resistance, capacitance or inductance) that are directly related to the water level. For example, the sensor uses a series of exposed wires, and when the water level rises or falls, the resistance between these wires changes, allowing the sensor to determine the current water level. In addition, the water level detection module 110 can also be a combination circuit or module including at least one sensor and a circuit with variable electrical characteristic parameters. For example, the sensor is set at a preset position. When the water level reaches the preset position, the sensor outputs a corresponding signal. The signal controls the circuit with variable resistance to be at a resistance value corresponding to the signal, thereby realizing water level detection, but is not limited to this.

[0057] The sampling module 120 can provide electrical energy so that the electrical characteristic parameters of the water level detection module 110 can be converted into a readable voltage, thereby enabling other control modules, such as MCU (Microcontroller Unit) and other microcontrollers to identify the water level according to the voltage and implement other control operations such as water inlet and outlet.

[0058] The electrical connection component 130, which can also be called an electronic connector or an electrical connector, is mainly used to provide a detachable connection method. In this embodiment, the electrical connection component 130 is used to detachably connect the water level detection module 110 and the sampling module 120, so that it can be separated from the water level detection module 110 when water level detection is not required, thereby improving the flexibility of the detection circuit. The electrical connection component 130 in this embodiment includes but is not limited to a connector and a contact, wherein the connector can be a radio frequency connector, a high temperature connector, etc.

[0059] The voltage at both ends of the water level detection module 110 is collected by the sampling module 120. Since the water level detection module 110 has electrical characteristic parameters corresponding to the water level, the voltage collected by the sampling module 120 is different when the water level is different. Based on this, the detection circuit in this embodiment can detect multiple water levels.

[0060] In addition, since the sampling module 120 is connected to both ends of the water level detection module 110 through the electrical connection component 130, the voltage collected by the sampling module 120 at this time can also represent the connection status of each port of the electrical connection component 130. Under normal connection conditions, the electrical connection component 130 makes the circuit between the sampling module 120 and the water level detection module 110 conductive; and when the electrical connection component 130 is abnormal and short-circuited, the two ends of the electrical connection component 130 connected to the sampling module 120 are conductively connected and short-circuited, or the two ends of the electrical connection component 130 connected to the water level detection module 110 are conductively connected and short-circuited, so the voltage collected by the sampling module 120 can also represent the connection status of the electrical connection component 130, thereby ensuring the normal operation of the circuit.

[0061] In one embodiment, see the attached Figure 2 , attached Figure 2 The schematic diagram of the structure of the sampling module 120 in this embodiment is shown; the sampling module 120 in this embodiment includes a unidirectional conduction unit 121, a constant current source unit 122 and a sampling unit 123. The conduction end and the cutoff end of the unidirectional conduction unit 121 are respectively connected to the two ends connected to the sampling module 120 and the two ends of the water level detection module 110, and the conduction end of the unidirectional conduction unit 121 is also used to connect the power supply, and the unidirectional conduction unit 121 is used to conduct when the electrical connection component 130 is short-circuited, so that the difference between the voltage and the power supply voltage provided by the power supply is less than or equal to a preset threshold value; the constant current source unit 122 is connected to the two ends of the water level detection module 110 through the electrical connection component 130; the two ends of the sampling unit 123 are respectively connected to the constant current source unit 122 and the water level detection module 110, for obtaining the voltage.

[0062] Among them, the unidirectional conduction unit 121 refers to a component or circuit that only allows current to flow from the conduction end to the cutoff end. Exemplarily, the unidirectional conduction elements in this embodiment include but are not limited to common diodes, rectifiers, thyristors, field effect transistors, single junction transistors, photodiodes, Schottky diodes, PIN diodes and Zener diodes. The constant current source unit 122 can provide a constant current and avoid interference with the voltage collection caused by load changes, so that the sampling module 120 can collect the accurate voltage corresponding to the water level.

[0063] The sampling unit 123 can be any component or circuit capable of performing voltage detection. Exemplarily, the sampling unit 123 includes one or more sensors, which are directly connected to the two ends of the water level detection module 110, thereby detecting the voltage at the two ends of the water level detection module 110 and converting it into an electrical signal that can be processed by the system. Another exemplary embodiment, the sampling unit 123 includes using an operational amplifier (op amp) to construct a differential amplifier, so that small voltage differences can be effectively amplified and high-precision voltage readings can be provided. Specifically, the two input ends of the op amp are respectively connected to the two ends of the water level detection module 110, and high-precision voltage acquisition is achieved by using virtual short and virtual break, but it is not limited to this.

[0064] In this embodiment, the conducting end and the cut-off end of the unidirectional conducting unit 121 are respectively connected to the two ends of the water level detection module 110 connected to the sampling module 120. When the electrical connection component 130 is normally connected, the unidirectional conducting unit 121 is connected in parallel with the water level detection module 110 through the electrical connection component 130. Since the conducting end of the unidirectional conducting unit 121 is connected to the power supply and has a certain voltage drop, the sampling module 120 can obtain the voltage corresponding to the water level at this time to detect the water level. When the electrical connection component 130 is short-circuited, the two ends of the water level detection module 110 or the sampling module 120 are conducting, which is equivalent to the conducting end and the cut-off end of the unidirectional conducting unit 121 being conducting connected at this time. At this time, the voltage collected by the sampling unit 123 is almost equal to the power supply voltage provided by the power supply. Therefore, the difference between the voltage and the power supply voltage is less than or equal to the preset threshold value at this time. Based on this, it can be confirmed whether the electrical connection component is short-circuited.

[0065] In one embodiment, see the attached Figure 3 , attached Figure 3 The structural schematic diagram of the constant current source unit 122 in this embodiment is shown; the constant current source unit 122 in this embodiment includes a first voltage-dividing component 1221, a second voltage-dividing component 1222 and a comparison component 1223, the first end of the first voltage-dividing component 1221 is connected to the conduction end of the unidirectional conduction unit 121, and is connected to one end of the water level detection module 110 through one end of the electrical connection component 130, and the second end of the first voltage-dividing component 1221 is used to connect to the equivalent ground end; the first end of the second voltage-dividing component 1222 is connected to the cut-off end of the unidirectional conduction unit 121, and is connected to the other end of the water level detection module 110 through the other end of the electrical connection component 130, and the second end of the second voltage-dividing component 1222 is used to connect to the equivalent ground end; the first input end of the comparison component 1223 is connected to the third end of the first voltage-dividing component 1221, the second input end of the comparison component 1223 is connected to the third end of the second voltage-dividing component 1222, and the output end of the comparison component 1223 is connected to the fourth end of the second voltage-dividing component 1222.

[0066] Among them, the first voltage divider component 1221 and the second voltage divider component 1222 refer to components or circuits used to obtain a preset voltage from a power supply. Since the constant current source unit 122 in this embodiment is mainly used to provide a stable current, it is necessary to feed back and adjust the current to keep the output current constant. This is usually achieved by comparing the reference voltage and the voltage generated by the actual current, and adjusting the output current through a feedback mechanism to match the preset current value. Therefore, the voltage dividing capabilities of the first voltage divider component 1221 and the second voltage divider component 1222 in this embodiment are different. Exemplarily, the first voltage divider component 1221 includes two or more resistors connected in series, which work together to distribute the input voltage according to their resistance ratios, thereby generating the required reference voltage. The second voltage-dividing component 1222 includes a switch tube (or other output device) and multiple resistors. Under the action of the comparison component 1223, when the current of the water level detection module 110 changes, the current is collected and fed back to the comparison component 1223, so that the comparison component 1223 compares the voltage corresponding to the current with the reference voltage, and then outputs an adjustment signal to adjust the conduction state of the switch tube (or other output device), thereby ensuring that the output current is constant. The constant current flows through the water level detection module 110 through the electrical connection component 130, so that a voltage difference appears at both ends of the water level detection module 110. At this time, the sampling module 120 samples the voltage difference to obtain the voltage corresponding to the water level.

[0067] In this embodiment, the first voltage divider component 1221 is used to provide a reference voltage to the comparison component 1223 under the action of the power supply voltage output by the power supply, and the second voltage divider component 1222 is used to collect the current of the water level detection module 110, and convert the current into a corresponding voltage and provide it to the comparison component 1223, so that the comparison component 1223 outputs a constant current based on the reference voltage and the current converted into a corresponding voltage, thereby avoiding changes in the current of the water level detection module 110 and causing errors in the voltage collected by the sampling module 120.

[0068] In one embodiment, see the attached Figure 4 , attached Figure 4A schematic diagram of the structure of the second voltage-dividing component 1222 in the present embodiment is shown; the second voltage-dividing component 1222 in the present embodiment includes a first switch element 410, a first resistor element 420, a second resistor element 430 and a third resistor element 440, the first conduction end of the first switch element 410 is connected to the conduction end of the unidirectional conduction unit 121, and is connected to the other end of the water level detection module 110 through the other end of the electrical connection component 130; the two ends of the first resistor element 420 are respectively connected to the output end of the comparison component 1223 and the controlled end of the first switch element 410; the two ends of the second resistor element 430 are respectively connected to the second input end of the comparison component 1223 and the second conduction end of the first switch element 410; the two ends of the third resistor element 440 are respectively connected to the second conduction end and the equivalent ground end of the first switch element 410.

[0069] The first switch element 410 can be any controlled switch. For example, the first switch element 410 includes but is not limited to a triode, an optocoupler, a transistor, a field effect transistor, a thyristor and a relay. In this embodiment, since the third resistor element 440 is mainly used to collect the voltage at one end of the water level detection module 110, and transmit the collected voltage to the comparison component 1223 so that the comparison component 1223 compares the voltage with the reference voltage input by the first voltage divider component 1221, thereby outputting a constant current, the current value output by the constant current source unit 122 can be adjusted by setting the third resistor element 440 with different resistance values, thereby adjusting the voltage difference range at both ends of the water level detection module 110, thereby improving the applicability of the detection circuit.

[0070] In one embodiment, taking the electrical characteristic parameter as resistance as an example, refer to Figures 5 (a) to 5 (d); the water level detection module 110 in this embodiment includes at least one resistance component 112 and at least one sensor unit 111, and the sensor unit 111 is used to output a switching signal corresponding to the water level; at least one resistance component 112 is connected to at least one sensor unit 111, and is connected to the sampling module 120 through an electrical connection component, and is used to have a resistance corresponding to the water level when receiving the switching signal.

[0071] The sensor unit 111 refers to any sensor device capable of detecting water level. For example, the sensor unit 111 includes but is not limited to a water sensor, a pressure water level sensor, an optical liquid level sensor, a float sensor, etc. The resistor component 112 refers to a circuit or module with a variable resistance value.

[0072] Taking the number of sensor units 111 as one for explanation, the sensor unit 111 at this time can be a sensor with multiple water level detection components, and the multiple water level detection components correspond to detecting multiple water levels respectively. At this time, it can be understood that the sensor unit 111 is provided with multiple switch signal output interfaces, and each switch signal output interface corresponds to a water level detection component. Therefore, the switch signals output by different switch output interfaces correspond to the water levels detected by the corresponding water level detection components, and the resistor component 112 has different resistances when receiving the switch signals output by different water level detection components. Correspondingly, the number of resistor components 112 can be one or more. Refer to Figure 5 (a), which shows a schematic diagram of a resistor component 112 connected to a sensor unit 111, and a resistor component 112 and multiple switch signal output interfaces of a sensor unit 111 (the ellipsis in Figure 5 (a) represents multiple switch signal output interfaces) have different resistance values ​​under the action of the switch signals output by different switch signal output interfaces. Refer to FIG. 5(b), which shows a schematic diagram of connecting multiple resistor components 112 to a sensor unit 111, wherein the multiple resistor components 112 are respectively connected one-to-one with multiple switch signal output interfaces of a sensor unit 111 (the ellipsis in FIG. 5(b) indicates omitted resistor components 112 and omitted switch signal output interfaces), and are used to receive switch signals output by each switch signal output interface. Under the action of different switch signals, the connection relationship of the multiple resistor components 112 changes, thereby changing the total resistance of the multiple resistor components 112.

[0073] In addition, the number of sensor units 111 can also be multiple, in which case the multiple sensor units 111 are respectively arranged at different water levels to output a switching signal when the water level is at the position of the corresponding sensor unit 111. The resistor component 112 has different resistances when receiving the switching signals output by different water level detection components. Correspondingly, the number of resistor components 112 can also be one or more. Referring to FIG. 5 (c), FIG. 5 (c) shows a schematic diagram of a resistor component 112 connected to multiple sensor units 111, and a resistor component 112 is connected to multiple sensor units 111 (the ellipsis in FIG. 5 (c) indicates the omitted sensor unit 111), and has different resistance values ​​when receiving the switching signals output by different sensor units 111. Refer to FIG. 5( d ), which shows a schematic diagram of connecting multiple resistor components 112 to multiple sensor units 111 (the ellipsis in FIG. 5( d ) indicates omitted sensor units 111 and omitted resistor components 112 ). The multiple resistor components 112 are connected to the multiple sensor units 111 one by one, respectively, for correspondingly receiving the switching signals output by each sensor unit 111 . Under the action of different switching signals, the connection relationship of the multiple resistor components 112 changes, thereby changing the total resistance of the multiple resistor components 112 .

[0074] In this embodiment, the sensor unit 111 can detect different water levels. When the water level reaches the corresponding position, the sensor unit 111 outputs a switching signal corresponding to the water level. The switching signal controls the resistance of the resistor component 112 to change, and the resistance is corresponding to the water level. Therefore, under the action of the electric energy provided by the sampling module 120, a voltage difference is generated at both ends connected to the sampling module 120, so that the sampling module 120 can collect the voltage difference and realize the identification of the water level.

[0075] In one embodiment, the water level detection module 110 is used to detect n water levels, n is a positive integer, and the number of the resistor component 112 is one. Figure 6 , attached Figure 6 The schematic diagram of the structure of the resistor component 112 in the present embodiment is shown; the resistor component 112 in the present embodiment includes a current limiting resistor 1121, n water level detection resistors 1122 and n second switch elements 1123, the current limiting resistor 1121 and each water level detection resistor 1122 are connected in series, and the two ends of the series-connected current limiting resistor 1121 and water level detection resistor 1122 are connected to the sampling module 120 through an electrical connection component 130; the resistance values ​​of the n water level detection resistors 1122 are different; the n second switch elements 1123 are connected in parallel with the n water level detection resistors 1122 in a one-to-one correspondence, and are connected to at least one sensor unit 111, and the second switch element 1123 is used to be turned on when a switch signal is received.

[0076] Similar to the first switch element 410, the second switch element 1123 in this embodiment can also be any controlled switch. When the water level reaches the position of a certain sensor unit 111, the second switch element 1123 connected to the sensor unit 111 is turned on, and correspondingly, the water level detection resistor 1122 connected in parallel with the second switch element 1123 is short-circuited, and at this time, the total resistance of the current limiting resistor 1121 and each water level detection resistor 1122 changes, and accordingly, the voltage across the series circuit composed of the current limiting resistor 1121 and each water level detection resistor 1122 changes, so the water level at this time can be identified according to the voltage.

[0077] In one embodiment, the sensor unit 111 includes a float sensor. The float sensor can also be called a float liquid level sensor. In this embodiment, the float sensor includes a float and a center rod, in which a reed switch is installed. Under normal conditions, the reed switch is in a disconnected state; and the float is magnetic. When the float reaches the reed switch position (i.e., the water level reaches a preset position) due to the buoyancy of water, the reed switch will be attracted, thereby generating a switch signal.

[0078] In other embodiments, only one sensor unit 111 may be provided. Correspondingly, the sensor unit 111 may be a float sensor including a center rod and n floats. One float corresponds to one water level. When a float reaches a water level, the corresponding switch signal is transmitted to the corresponding second switch element 1123, so that the water level detection resistor 1122 connected in parallel therewith is short-circuited, thereby changing the total resistance value of the resistor component 112.

[0079] It can be understood that in other embodiments, the number of resistor components 112 can be multiple, each resistor component 112 can include the above-mentioned current limiting resistor 1121, n water level detection resistors 1122 and n second switch elements 1123, and multiple resistor components 112 can be connected to one sensor unit 111, or can be connected to multiple sensor units 111 in a one-to-one correspondence. The implementation principle is shown in Figures 5 (b), 5 (d) and Figure 6 , I will not go into details here.

[0080] In one embodiment, see the attached Figure 7 , attached Figure 7 The second structural schematic diagram of the detection circuit in this embodiment is shown; the detection circuit in this embodiment also includes a main control module 140, and the main control module 140 is provided with an ADC (Analog-to-Digital Converter) interface 141. The main control module 140 is connected to the sampling module 120 through the ADC interface 141, and performs analog-to-digital conversion on the voltage through the ADC interface 141, so that the main control module 140 determines the water level and the connection status of the electrical connection component 130 through the voltage after the analog-to-digital conversion.

[0081] The main control module 140 refers to an electronic module that integrates functions such as a microprocessor, a memory, and an input / output interface, such as an MCU, an STM32 main control circuit, etc. The main control module 140 can be programmed to realize multiple functions such as data acquisition, signal processing, and communication control. The ADC interface 141 is an interface that can convert analog signals into digital signals. The ADC interface 141 helps the microprocessor inside the main control module 140 to identify and process the converted digital signals.

[0082] It is understandable that the main control module 140 usually cannot withstand excessively high voltage or current. Therefore, in order to further protect the main control module 140, the acquisition unit in the sampling module 120 can use a circuit or device with a voltage attenuation function, such as a common-phase attenuator or an anti-phase attenuator, but not limited to this.

[0083] In this embodiment, the main control module 140 only needs to be connected to the sampling module 120 through an ADC interface 141 to obtain the signal corresponding to the water level, which reduces the number of interfaces of the main control module 140 and avoids consuming the interfaces of the main control module 140. In addition, since the main control module 140 has the functions of data acquisition, signal processing and communication control, the main control module 140 can also implement other control operations according to the received signal corresponding to the water level, such as water inlet, water outlet, and power off when the electrical connection component is short-circuited, etc., to improve the intelligence and safety of the detection circuit.

[0084] In one embodiment, the electrical connection assembly 130 includes two connectors, and the two connectors are electrically connected to two ends of the water level detection module 110 and two ends of the sampling module 120 in a one-to-one correspondence.

[0085] The connector in this embodiment refers to a connecting device used to separately connect two independent modules, which can realize the transmission of signals and electrical energy. The connector includes but is not limited to a radio frequency connector, a high temperature connector, a sealed glass sealing connector, etc. Considering that the connector in this embodiment needs to connect the water level detection module 110 and the sampling module 120, which are in a working environment with high humidity, in order to improve its service life, it can be waterproofed or a connector with good sealing performance can be used.

[0086] In one embodiment, different from the previous embodiment, the electrical connection component 130 may further include two contacts, and the two contacts are electrically connected to the two ends of the water level detection module 110 and the two ends of the sampling module 120 in a one-to-one correspondence. In this embodiment, the water level detection module 110 and the sampling module 120 are electrically connected through the contacts, which realizes a more direct electrical connection compared to the electrical connector in the previous embodiment, reduces the contact resistance in the circuit, and makes the voltage collected by the sampling module 120 more accurate.

[0087] In one embodiment, see the attached Figure 8 , attached Figure 8 The third structural schematic diagram of the detection circuit in this embodiment is shown; the detection circuit in this embodiment includes resistors R1 to R5, an operational amplifier U1, a diode D1, a transistor Q1, an electrical connection component 130, a float sensor 1111, a resistor component 112, a sampling unit 123 and a microprocessor 142, and the microprocessor 142 is provided with an ADC interface 141. The resistors R1 to R5, the operational amplifier U1, and the transistor Q1 constitute the constant current source unit 122 in the above embodiment, the two ends of the resistor R1 are respectively connected to the output end and the base of the transistor Q1, the two ends of the resistor R2 are respectively connected to the inverting input end of the operational amplifier U1, the emitter of the transistor Q1 and one end of the resistor R3, the other end of the resistor R3 is connected to the equivalent ground GND, the two ends of the resistor R4 are respectively connected to the power supply VCC and the in-phase input end of the operational amplifier U1, and the two ends of the resistor R5 are respectively connected to the in-phase input end of the operational amplifier U1 and the equivalent ground GND. Resistors R5 and R4 divide the supply voltage output by the power supply VCC to provide a reference voltage for the operational amplifier U1. Resistors R2 and R3 divide the signal from the sampling unit 123 to provide a load voltage to the operational amplifier U1, so that the operational amplifier U1 provides a constant current to the resistor component 112 under the action of the reference voltage and the load voltage, so that the sampling unit 123 can collect the voltage at both ends of the resistor component 112 corresponding to the water level, thereby realizing the detection and identification of the water level.

[0088] The diode D1 is equivalent to the one-way conducting unit 121 in the above embodiment, and its function and connection relationship are consistent with the one-way conducting unit 121, so it will not be repeated here. The float sensor 1111 is equivalent to the sensor unit 111 in the above embodiment, and the connection relationship and function of the two are consistent, so it will not be repeated here. The microprocessor 142 is equivalent to the main control module 140 in the above embodiment, and its function and connection relationship are consistent with the main control module 140, so it will not be repeated here.

[0089] In one embodiment, the present application also provides a cleaning robot workstation 10, see the attached Fig. 9 , attached Fig. 9 A structural schematic diagram of the cleaning robot workstation 10 in this embodiment is shown. The cleaning robot workstation 10 in this embodiment includes a water tank 200 and a detection circuit in any of the above embodiments, wherein a water level detection module 110 in the detection circuit is arranged in the water tank 200 to detect the water level of the water tank 200.

[0090] The above-mentioned cleaning robots include but are not limited to sweeping robots, window washing robots and other intelligent robots equipped with sinks, water tank workstations and capable of automatic water addition.

[0091] It can be understood that since the cleaning robot workstation 10 in this embodiment contains the detection circuit in any of the above embodiments, when the detection circuit in any of the above embodiments has further technical effects compared to the prior art, the cleaning robot workstation 10 in this embodiment also has further technical effects accordingly.

[0092] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0093] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the application. It should be noted that, for a person of ordinary skill in the art, several variations and improvements may be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the attached claims.

Claims

1. A detection circuit, characterized in that: include: A water level detection module, having at least one electrical characteristic parameter corresponding to the water level, so as to detect at least one water level; A sampling module, connected to both ends of the water level detection module through an electrical connection component, for providing electrical energy to collect the voltage at both ends of the water level detection module; the voltage corresponds to the electrical characteristic parameter, and the voltage is also used to characterize the connection state of the electrical connection component; the connection state includes a short-circuit connection and a normal connection, and the short-circuit connection is a conductive connection between the two ends of the electrical connection component and the water level detection module or the electrical connection component and the sampling module; wherein the sampling module includes: A unidirectional conducting unit, wherein the conducting end and the cutting end of the unidirectional conducting unit are respectively connected to the two ends of the sampling module and the two ends of the water level detection module, the conducting end of the unidirectional conducting unit is also used to connect to the power supply, and the unidirectional conducting unit is used to conduct when the electrical connection component is short-circuited, so that the difference between the voltage and the power supply voltage provided by the power supply is less than or equal to a preset threshold value; A constant current source unit, connected to two ends of the water level detection module through the electrical connection component; A sampling unit, two ends of which are respectively connected to the constant current source unit and the water level detection module, for acquiring the voltage.

2. The detection circuit according to claim 1, characterized in that: The constant current source unit comprises: A first voltage-dividing component, wherein a first end of the first voltage-dividing component is connected to the conducting end of the unidirectional conducting unit and is connected to one end of the water level detecting module through one end of the electrical connecting component, and a second end of the first voltage-dividing component is used to connect to an equivalent ground end; A second voltage-dividing component, wherein a first end of the second voltage-dividing component is connected to the cut-off end of the unidirectional conductive unit and is connected to the other end of the water level detection module through the other end of the electrical connection component, and a second end of the second voltage-dividing component is used to connect to an equivalent ground end; A comparison component, wherein a first input terminal of the comparison component is connected to a third terminal of the first voltage-dividing component, a second input terminal of the comparison component is connected to a third terminal of the second voltage-dividing component, and an output terminal of the comparison component is connected to a fourth terminal of the second voltage-dividing component.

3. The detection circuit according to claim 2, characterized in that: The second voltage dividing component comprises: a first switch element, wherein a first conducting end of the first switch element is connected to a conducting end of the unidirectional conducting unit, and is connected to another end of the water level detection module through another end of the electrical connection component; A first resistance element, wherein two ends of the first resistance element are respectively connected to the output end of the comparison component and the controlled end of the first switch element; A second resistance element, wherein two ends of the second resistance element are respectively connected to the second input end of the comparison component and the second conduction end of the first switch element; A third resistance element, wherein two ends of the third resistance element are respectively connected to the second conduction end and the equivalent ground end of the first switch element.

4. The detection circuit according to claim 1, characterized in that: The electrical characteristic parameters include resistance; the water level detection module includes: At least one sensor unit, used to output a switch signal corresponding to the water level; At least one resistance component is connected to at least one of the sensor units and is connected to the sampling module through the electrical connection component, and is used to have a resistance corresponding to the water level when receiving the switch signal.

5. The detection circuit according to claim 4, characterized in that: The water level detection module is used to detect n water levels, where n is a positive integer, and the number of the resistor components is one, and the resistor component includes: A current limiting resistor and n water level detection resistors, wherein the current limiting resistor and each of the water level detection resistors are connected in series, and both ends of the series-connected current limiting resistor and the water level detection resistor are connected to the sampling module through the electrical connection component; the resistance values ​​of the n water level detection resistors are different; n second switch elements, the n second switch elements are connected in parallel with the n water level detection resistors in a one-to-one correspondence and are connected to at least one of the sensor units, and the second switch elements are used to be turned on when receiving the switch signal.

6. The detection circuit according to claim 4, characterized in that: The sensor unit includes a float sensor.

7. The detection circuit according to claim 1, characterized in that: Also includes: A main control module, wherein the main control module is provided with an ADC interface, the main control module is connected to the sampling module via the ADC interface, and performs analog-to-digital conversion on the voltage via the ADC interface, so that the main control module determines the water level and the connection status of the electrical connection component via the voltage after the analog-to-digital conversion.

8. The detection circuit according to any one of claims 1 to 7, characterized in that: The electrical connection assembly includes two connectors, and the two connectors are electrically connected to the two ends of the water level detection module and the two ends of the sampling module in a one-to-one correspondence; or, The electrical connection assembly includes two contacts, and the two contacts are electrically connected to two ends of the water level detection module and two ends of the sampling module in a one-to-one correspondence.

9. A cleaning robot workstation, characterized in that: include: Water tank; As described in any one of claims 1 to 8 above, the water level detection module of the detection circuit is arranged in the water tank to detect the water level of the water tank.

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