Portable carbon powder electrical property detection device and detection method thereof

Abstract

The invention provides a portable carbon powder electrical property detection device and a detection method thereof.The portable carbon powder electrical property detection device comprises a machine body and a detection unit, the machine body is provided with a detection area and an indication area, and the detection unit is arranged in the machine body; the detection unit comprises a power supply circuit, a negative carbon powder detection circuit and a positive carbon powder detection circuit, the negative carbon powder detection circuit and the positive carbon powder detection circuit are electrically connected with the power supply circuit, the negative carbon powder detection circuit comprises a first induction electrode and a first indication element, and the positive carbon powder detection circuit comprises a second induction electrode and a second indication element; the first induction electrode and the second induction electrode are both arranged in the detection area, and the first indication element and the second indication element are both arranged in the indication area. The invention further provides a detection method of the portable carbon powder electrical property detection device. The portable carbon powder electrical property detection device has the advantages that the use site is flexible, and the electrical property of the carbon powder can be quickly and efficiently identified.

Description

Technical Field

[0001] This invention relates to the field of electrical testing equipment technology, specifically to a portable toner electrical testing device and a testing method for the portable toner electrical testing device. Background Technology

[0002] Existing toners are classified as positive or negative, and different products may use toners with different electrical properties; however, the positive or negative electrical properties of toners cannot be distinguished by visual observation. During the production process, when the production line changes the product being filled with toner, a toner replacement is required. To prevent errors during toner replacement, electrical property testing of the toner is usually necessary. Currently, the practice for toner electrical property testing is to send samples to the laboratory within the factory premises for electrical testing using a dedicated charge detector. The charge detector can not only identify the charge but also detect the amount of charge on the sample. However, charge detectors are relatively expensive, require fixed use, and have drawbacks such as long testing cycles and low efficiency. They cannot help workers quickly identify the electrical properties of toners on the production line, and the testing process is complex, which is not conducive to improving production efficiency. Summary of the Invention

[0003] To address the aforementioned problems, the primary objective of this invention is to provide a portable toner electrical properties detection device that is flexible in its application location and can quickly and efficiently identify the electrical properties of toner.

[0004] A second objective of this invention is to provide a detection method for the aforementioned portable toner electrical properties detection device.

[0005] To achieve the first objective of this invention, this invention provides a portable toner electrical property detection device, comprising a body and a detection unit. The body is provided with a detection area and an indicator area. The detection unit is disposed within the body and includes a power supply circuit and a negative toner detection circuit and a positive toner detection circuit electrically connected to the power supply circuit. The negative toner detection circuit includes a first sensing electrode and a first indicator element, and the positive toner detection circuit includes a second sensing electrode and a second indicator element. The first sensing electrode and the second sensing electrode are both disposed within the detection area, and the first indicator element and the second indicator element are both disposed within the indicator area.

[0006] As can be seen from the above, when it is necessary to test the electrical properties of toner, the toner can be rubbed against the test rod, and the test plate with the toner attached can be placed in the test area. The test unit can quickly determine the electrical properties of the toner through the negative toner detection circuit and the positive toner detection circuit, and the user can intuitively know the electrical properties of the toner through the corresponding indicator elements. Moreover, based on the portability of the portable toner electrical property testing device, the toner electrical property testing process steps and cycle can be effectively simplified, enabling rapid and efficient identification of toner electrical properties on the production site and improving production efficiency.

[0007] A further embodiment is that the first indicating element is a first light-emitting diode (LED), and the second indicating element is a second LED. The negative toner detection circuit also includes a first resistor, a second resistor, and a PMOS transistor. The first resistor is connected between the first sensing electrode and the gate of the PMOS transistor. The source of the PMOS transistor is connected to the positive power supply terminal of the power supply circuit, and the drain of the PMOS transistor is connected to the anode of the first LED. The second resistor is connected between the cathode of the first LED and the ground terminal. The positive toner detection circuit also includes a third resistor, a fourth resistor, and an NMOS transistor. The third resistor is connected between the second sensing electrode and the gate of the NMOS transistor. The drain of the NMOS transistor is connected to the positive power supply terminal, and the source of the NMOS transistor is connected to the anode of the second LED. The fourth resistor is connected between the cathode of the second LED and the ground terminal.

[0008] As can be seen from the above, using light-emitting diodes as indicator elements simplifies the circuit structure and provides users with an intuitive display of the detection structure. Through the design of negative and positive toner detection circuits, the detection unit can quickly identify and determine the electrical properties of the toner by turning on or off the NMOS and PMOS transistors after receiving positive / negative electrons, and then display and remind users of the electrical properties of the toner through the corresponding indicator elements.

[0009] A further proposed solution includes a fifth resistor, a sixth resistor, and a power switch in the power supply circuit. The fifth resistor is connected between the ground terminal and the first terminal of the sixth resistor, and the power switch is connected between the power supply and the second terminal of the sixth resistor. The positive power supply terminal is connected to the power supply through the power switch, and the ground terminal is connected to the negative power supply terminal of the power supply circuit. The connection node between the fifth and sixth resistors is provided with a voltage divider power supply terminal.

[0010] As can be seen from the above, by designing the power supply circuit, the circuit pins can be set to a default high level, interference can be suppressed, and current limiting protection can be provided to avoid device damage or logic confusion.

[0011] A further proposed solution is that the testing unit also includes a functional test circuit, which includes a functional test button connected between the voltage divider power supply and the gate of the PMOS transistor. The functional test button is located in the control area of ​​the device.

[0012] As can be seen from the above, the functionality of the circuit can be checked by briefly pressing the function test button of the function test circuit.

[0013] A further proposed solution is that the detection unit also includes a charge clearing circuit, which includes a negative charge clearing button and a positive charge clearing button. The negative charge clearing button is connected between the gate of the PMOS transistor and the connection node between the power switch and the sixth resistor, while the positive charge clearing button is connected between the gate of the NMOS transistor and the ground terminal.

[0014] As can be seen from the above, the charge clearing circuit is used to reset the residual charge on the first and second sensing electrodes to zero, so as to ensure the accuracy of detection.

[0015] A further proposed solution is that the first LED and the second LED emit different colors; and / or the fuselage has a first indicator mark at the first LED and a second indicator mark at the second LED.

[0016] As can be seen from the above, this design allows users to intuitively identify the electrical properties of the toner being tested, while also helping to simplify the design of portable toner electrical property testing devices and reduce their manufacturing costs.

[0017] A further proposed solution is that the detection area is platform-shaped and has a sensing plane, with both the first and second sensing electrodes located on the sensing plane; or the body has a slot that penetrates the body in a first direction, and the slot includes a first wall and a second wall arranged opposite to each other, with one of the first and second walls having a first sensing electrode and the other having a second sensing electrode, or both the first and second walls having a first sensing electrode and a second sensing electrode, with the first sensing electrodes on the two walls arranged opposite to each other and the second sensing electrodes on the two walls arranged opposite to each other.

[0018] As can be seen from the above, portable toner electrical detection devices have diverse structures, and their detection areas can be set to open or semi-open to improve production flexibility.

[0019] A preferred embodiment is that the device body includes a main body and a compartment cover. The detection area is located on the main body, which has a battery compartment in which a battery is detachably installed. The positive terminal of the battery is connected to the positive power supply terminal of the power circuit, and the negative terminal of the battery is connected to the negative power supply terminal of the power circuit. The compartment cover is detachably connected to the main body and is used to seal the opening of the battery compartment.

[0020] As can be seen from the above, this design simplifies the circuit structure of the detection unit and also facilitates the removal and replacement of the battery.

[0021] Another preferred solution is to have a built-in power supply unit, with the positive terminal of the power supply unit connected to the positive power supply terminal of the power circuit and the negative terminal of the power supply unit connected to the negative power supply terminal of the power circuit; the device is equipped with a charging interface or a wireless charging module, and the power supply unit can obtain power through the charging interface or the wireless charging module.

[0022] As can be seen from the above, using a built-in battery for power supply, compared to the traditional use of dry batteries, can avoid the problems of excessive discharge and leakage due to aging of dry batteries, thereby preventing damage to the detection unit and its power circuit due to leakage. In addition, it also helps to further improve the portability of portable toner electrical detection devices and extend their battery life.

[0023] To achieve the second objective of this invention, the present invention provides a detection method for a portable toner electrical properties detection device. The portable toner electrical properties detection device employs the aforementioned portable toner electrical properties detection device, and the detection method includes: rubbing the toner to be tested and a detection rod; placing a detection plate with toner attached at the detection area to allow the detection unit to detect the electrical properties of the toner; when the toner is negatively charged, the negatively charged toner detection circuit of the detection unit acquires a first induced voltage and causes a first indicating element to indicate; when the toner is positively charged, the positively charged toner detection circuit of the detection unit acquires a second induced voltage and causes a second indicating element to indicate.

[0024] As can be seen from the above, by combining the above detection methods with a portable toner electrical property detection device, the electrical properties of toner can be quickly, efficiently and accurately identified on the production site, thereby simplifying the toner electrical property detection and identification process, shortening the detection cycle and improving production efficiency. Attached Figure Description

[0025] Figure 1 This is a structural diagram of the first embodiment of the portable toner electrical property detection device of the present invention.

[0026] Figure 2 This is a first-view structural diagram of the portable toner electrical property detection device of the present invention, with some components omitted.

[0027] Figure 3 This is an exploded view of the first embodiment of the portable toner electrical property detection device of the present invention.

[0028] Figure 4 This is a second-view structural diagram of the first embodiment of the portable toner electrical property detection device of the present invention, with some components omitted.

[0029] Figure 5 This is a circuit diagram of the detection unit of the first embodiment of the portable toner electrical property detection device of the present invention.

[0030] Figure 6 This is a schematic diagram of the charge generated by friction between the tested toner sample and the detection plate in the first embodiment of the portable toner electrical detection device of the present invention.

[0031] Figure 7 This is a reference diagram showing the usage state of the first embodiment of the portable toner electrical property detection device of the present invention.

[0032] Figure 8 This is a structural diagram of the second embodiment of the portable toner electrical property detection device of the present invention.

[0033] Figure 9 This is a reference diagram showing the usage state of the second embodiment of the portable toner electrical property detection device of the present invention.

[0034] The present invention will be further described below with reference to the accompanying drawings and embodiments. Detailed Implementation

[0035] First embodiment of portable toner electrical detection device Reference Figure 1 and Figure 2 The portable toner electrical testing device 100 includes a body 1 and a testing unit 2; the body 1 is provided with a testing area 110 and an indicator area, and the testing unit 2 is located inside the body 1.

[0036] Combination Figure 3 In this embodiment, the portable toner electrical conductivity testing device 100 uses an external power supply, meaning the battery powering the portable toner electrical conductivity testing device 100 is removable. Specifically, the device body 1 includes a main body 11 and a cover 12. The detection area 110 is located on the main body 11, and the main body 11 also has a battery compartment 111. The battery is removably installed in the battery compartment 111 to power the detection unit 2. The cover 12 is detachably connected to the main body 11, so that when the cover 12 is installed on the main body 11, it seals the opening of the battery compartment 111, thereby preventing the battery from falling out of the battery compartment 111 and protecting the battery from external dust and moisture entering the battery compartment 111, which could cause a short circuit between the battery and the detection unit 2. The battery compartment 111 on the main body 11, allowing for a detachable connection between the battery and the battery compartment 111, simplifies the circuit structure of the detection unit 2 and facilitates battery removal and replacement.

[0037] Furthermore, in this embodiment, the detection area 110 is platform-shaped and has a sensing plane. The platform shape is formed by the substrate 20 of the detection unit 2. Similarly, the sensing plane is also formed by the substrate 20. That is, the area on the substrate 20 where the sensing plane is formed is located within the detection area 110 of the body 11 of the fuselage 1.

[0038] Combination Figure 4 and Figure 5 The detection unit 2 also includes a power supply circuit, a negative toner detection circuit, a positive toner detection circuit, a functional test circuit, and a charge clearing circuit; the power supply circuit, the negative toner detection circuit, the positive toner detection circuit, the functional test circuit, and the charge clearing circuit are all integrated on the substrate 20.

[0039] The power supply circuit includes a fifth resistor R5, a sixth resistor R6, and a power switch SW1. The first end of the fifth resistor R5 is connected to a ground terminal on the substrate 20, and the second end of the fifth resistor R5 is connected to the first end of the sixth resistor R6. The second end of the sixth resistor R6 is connected to the first end of the power switch SW1, and the second end of the power switch SW1 is connected to a power supply (such as a battery). A clearance hole is provided on the body 1, and the power switch SW1 is located within the clearance hole. The positive power supply terminal is connected to the positive terminal of the battery through the power switch SW1, allowing the battery to supply voltage to the power supply circuit. In this embodiment, the battery supplies +3V to the positive power supply terminal. The switching on or off of the power switch SW1 also enables the battery to supply power to the power supply circuit or disconnect the battery's power supply to the power supply circuit. In this embodiment, the power switch SW1 is a toggle switch; however, in some embodiments, the power switch SW1 can also be a push-button switch. Furthermore, the ground terminal is connected to the negative power supply terminal of the power supply circuit, and the negative power supply terminal is connected to the negative terminal of the battery. By designing the power supply circuit, the circuit pins can be set to a default high level to suppress interference, while also providing current limiting protection to prevent device damage or logic confusion.

[0040] The negatively charged toner detection circuit includes a first sensing electrode E1, a first indicating element, a first resistor R1, a second resistor R2, and a PMOS transistor Q1. The first sensing electrode E1 is disposed on the sensing plane, such that the first sensing electrode E1 is located within the detection area 110; the first indicating element is disposed within the indicating area (e.g., if the body 11 has a first through hole, the first indicating element is disposed within the first through hole). The first indicating element is preferably a first light-emitting diode LED1. This design helps to simplify the circuit structure and provides a clear display of the detection structure to the user; the first end of the first resistor R1 is connected to the first sensing electrode E1, and the second end of the first resistor R1 is connected to the gate (G) of the PMOS transistor Q1 [that is, the source (S) of the PMOS transistor Q1 is also connected between the power switch SW1 and the sixth resistor R6]; the source (S) of the PMOS transistor Q1 is connected to the positive power supply terminal (VCC, +3V) of the power supply circuit, and the drain (D) of the PMOS transistor Q1 is connected to the anode of the first light-emitting diode LED1; the second resistor R2 is connected between the cathode of the first light-emitting diode LED1 and the ground terminal.

[0041] The positive charge toner detection circuit includes a second sensing electrode E2, a second indicating element, a third resistor R3, a fourth resistor R4, and an NMOS transistor Q2. The second sensing electrode E2 is disposed on the sensing plane, such that the second sensing electrode E2 is located within the detection area 110; the second indicating element is disposed within the indicating area (e.g., if the body 11 has a second through hole, the second indicating element is disposed within the second through hole), and the second indicating element is preferably a second light-emitting diode LED2. This design helps to simplify the circuit structure and provides a clear display of the detection structure to the user; the first end of the third resistor R3 is connected to the second sensing electrode E2, and the second end of the third resistor R3 is connected to the gate (G) of the NMOS transistor Q2; the drain (D) of the NMOS transistor Q2 is connected to the positive power supply terminal (VCC, +3V) of the power supply circuit, and the source (S) of the NMOS transistor Q2 is connected to the anode of the second light-emitting diode LED2; the fourth resistor R4 is connected between the cathode of the second light-emitting diode LED2 and the ground terminal.

[0042] By designing negative and positive toner detection circuits, the detection unit 2 can quickly identify and determine the electrical properties of the toner after receiving positive / negative electrons by turning on or off the NMOS transistor Q2 and PMOS transistor Q1, and display the electrical properties of the toner through the corresponding indicator elements.

[0043] Preferably, the first light-emitting diode LED1 and the second light-emitting diode LED2 emit different colors. For example, the first light-emitting diode LED1 can emit green light, and the second light-emitting diode LED2 can emit red light. By using different colored light-emitting diodes, the user can quickly understand the electrical properties of the toner being tested. And / or, the body 1 has a first indicator mark 112 (such as "-" indicating the negative charge of the toner) at the first light-emitting diode LED1, and the body 1 has a second indicator mark 113 (such as "+" indicating the positive charge of the toner) at the second light-emitting diode LED2. By setting the indicator marks, the user can intuitively point to the electrical properties of the toner being tested. This design also helps to simplify the design of the portable toner electrical property testing device 100 and reduce the manufacturing cost of the portable toner electrical property testing device 100.

[0044] The connection node between the fifth resistor R5 and the sixth resistor R6 is provided with a voltage divider power supply terminal; the functional test circuit includes a functional test button SW4, which is connected between the voltage divider power supply terminal (in this embodiment, the voltage divider power supply terminal is +1.5V) and the gate (G) of the PMOS transistor Q1. The functional test button SW4 is installed in the control area of ​​the body 1 (e.g., if the body 11 has a third through hole, the functional test button SW4 is located in the third through hole). The functional test circuit is used to detect whether the circuit function is normal. During testing, the functional test button SW4 can be pressed briefly.

[0045] The charge clearing circuit includes a negative charge clearing button SW2 and a positive charge clearing button SW3, both located within the control area of ​​the main body 1 (e.g., if the main body 11 has a fourth and a fifth through hole, the negative charge clearing button SW2 is located in the fourth through hole, and the positive charge clearing button SW3 is located in the fifth through hole). The negative charge clearing button SW2 is connected between the gate (G) of the PMOS transistor Q1 and the connection node between the power switch SW1 and the sixth resistor R6 [i.e., the positive power supply terminal (VCC, +3V) of the power circuit]. The positive charge clearing button SW3 is connected between the gate (G) of the NMOS transistor Q2 and the ground terminal. The charge clearing circuit is used to reset the residual charge on the first sensing electrode E1 and the second sensing electrode E2 to zero, ensuring the accuracy of the detection.

[0046] Combination Figure 6 and Figure 7 By designing the portable toner electrical property testing device 100, when it is necessary to test the electrical properties of toner, the toner can be rubbed against the test rod 103, and the test plate with the toner attached can be placed at the test area 110. The test unit 2 can quickly determine the electrical properties of the toner through the negative toner detection circuit and the positive toner detection circuit, and the user can intuitively know the electrical properties of the toner through the corresponding indicator elements. Moreover, based on the portability of the portable toner electrical property testing device 100, the toner electrical property testing process steps and cycle can be effectively simplified, enabling rapid and efficient identification of toner electrical properties on the production site and improving production efficiency.

[0047] Second embodiment of portable toner electrical detection device Reference Figure 8 and Figure 9 The difference between this embodiment and the first embodiment of the portable toner electrical testing device lies in the structural design of the body 1. Specifically, in this embodiment: The detection area 110 on the body 1 is no longer platform-shaped, but instead has a slot 10 on the body 1 [or main body 11 (when the portable toner electrical detection device 100 is an external power source)]. This slot 10 is the detection area 110. The slot 10 penetrates the body 1 in a first direction and includes a first wall portion 1011 and a second wall portion 1012 arranged opposite to each other, making the slot 10 roughly "U"-shaped.

[0048] As an alternative, one of the first wall portion 1011 and the second wall portion 1012 is provided with a first sensing electrode E1 and the other is provided with a second sensing electrode E2.

[0049] As an alternative, both the first wall portion 1011 and the second wall portion 1012 are provided with a first sensing electrode E1 and a second sensing electrode E2; wherein, the first sensing electrodes E1 on the two wall portions are distributed along the distribution direction of the first wall portion 1011 and the second wall portion 1012, such that the first sensing electrodes E1 on the two wall portions are arranged opposite to each other. Similarly, the second sensing electrodes E2 on the two wall portions are distributed along the distribution direction of the first wall portion 1011 and the second wall portion 1012, and the second sensing electrodes E2 on the two wall portions are arranged opposite to each other.

[0050] As can be seen, the portable toner electrical detection device 100 has a variety of structures, and its detection area 110 can be set as open or semi-open to improve production flexibility. In addition, the design of this embodiment can ensure that when the detection rod 103 is placed in the slot 10, the toner attached to it is always within the sensing range of the first sensing electrode E1 and the second sensing electrode E2, so as to ensure the accuracy of detection.

[0051] Third embodiment of portable toner electrical detection device The difference between this embodiment and the first or second embodiment of the portable toner electrical testing device lies in the power supply configuration. Specifically, in this embodiment: The body 1 is no longer divided into a main body 11 and a cover, nor does it have a separate battery compartment 111 for retrieving the power unit. Instead, the power unit is built into the body 1 and is not removable. The positive terminal of the power unit is connected to the positive power supply terminal of the power circuit, and the negative terminal is connected to the negative power supply terminal of the power circuit. Furthermore, the body 1 is equipped with a charging port or a wireless charging module, allowing the power unit to obtain power through these means.

[0052] In this embodiment, the detection unit 2 needs to be configured with a rectifier power supply connection and a charging interface, and a wireless charging module connection to the power unit to ensure the stability, reliability and safety of charging the power unit.

[0053] Compared to traditional dry cell batteries, using a built-in battery for power supply avoids issues such as over-discharge and leakage due to aging of dry cell batteries, thus preventing damage to the detection unit 2 and its power circuit due to leakage. In addition, it also helps to further improve the portability of the portable toner electrical detection device 100 and extend its battery life.

[0054] Example of a detection method for a portable toner electrical detection device The detection method provided by this invention can be applied to the portable toner electrical testing device 100 described in any of the first to third embodiments of the portable toner electrical testing device. The detection method includes the following steps: The portable toner electrical property testing device 100 is initialized by: turning on the power switch SW1, then briefly pressing the function test button SW4 until the signal indicator shows that the testing circuit is functioning normally. Next, the electrodes are zeroed by: pressing the negative zero button SW2 until the signal indicator shows that the residual charge on the first sensing electrode E1 is zero; and pressing the positive zero button SW3 until the signal indicator shows that the residual charge on the second sensing electrode E2 is zero. This completes the initialization of the portable toner electrical property testing device 100.

[0055] Since the toner sample 102 being tested is not charged itself, it is necessary to generate a charge through friction that can be detected by the portable toner electrical detection device 100. To ensure ease of use, the following method can be used: Figure 6 As shown, a test rod 103 (such as a glass rod) and ordinary paper 101 can be used as the test carrier. The toner sample 102 to be tested is laid flat on the surface of the paper 101, and the test rod 103 is partially wrapped with the toner sample 102. An artificial squeezing force is applied to drive the relative motion between the toner sample 102 and the test rod 103, causing the toner sample 102 and the glass rod to rub against each other and generate an electric charge. It should be noted that the triboelectric charging operation includes, but is not limited to, the friction between the glass rod and the toner sample 102.

[0056] Next, the detection rod 103, which has undergone mutual rubbing and is attached to the toner sample 102 to be tested, is brought close to the detection area 110 of the portable toner electrical property detection device 100. When using the portable toner electrical property detection device 100 described in the first or third embodiment, the detection rod 103 with the toner sample 102 attached is placed 1 cm to 5 cm above the sensing plane, so that the detection unit 2 can detect and identify the electrical type of the toner sample 102. When using the portable toner electrical property detection device 100 described in the second or third embodiment, the detection rod 103 with the toner sample 102 attached is placed in the slot 10, so that the detection unit 2 can detect and identify the electrical type of the toner sample 102.

[0057] The detection principles of the negative toner detection circuit and the positive toner detection circuit in detection unit 2 are as follows: When the detection rod 103 rubbed with the negatively charged toner sample to be measured 102 approaches the detection area 110, based on the principle of electrostatic induction, corresponding negative charges are generated in the induction area of the first induction electrode E1, thereby forming an induction voltage Vn. The induction voltage Vn is transmitted to the gate (G) of the PMOS transistor Q1 via the first resistor R1; when the difference between the gate (G) of the PMOS transistor Q1 and the source (S) of the PMOS transistor Q1 satisfies the first preset condition [such as (Vn - Vcc) < Vth (threshold voltage)], a conduction path is formed between the drain (D) and the source (S) of the PMOS transistor Q1. At this time, current flows in from the source (S) of the PMOS, passes through the first light-emitting diode LED1 and the second resistor R2 in sequence, and finally returns to the ground terminal, thereby causing the first light-emitting diode LED1 to emit light.

[0058] When the detection rod 103 rubbed with the positively charged toner sample to be measured 102 approaches the detection area 110, based on the principle of electrostatic induction, corresponding positive charges are generated in the induction area of the second induction electrode E2, thereby forming an induction voltage Vp. The induction voltage Vp is transmitted to the gate (G) of the NMOS transistor Q2 via the third resistor R3; when the voltage between the gate (G) of the NMOS transistor Q2 and the source (S) of the NMOS transistor Q2 satisfies the second preset condition [such as (Vp - 0) > Vth (threshold voltage)], a conduction path is formed between the drain (D) and the source (S) of the NMOS transistor Q2. At this time, current flows in from the drain (D) of the NMOS, passes through the second light-emitting diode LED2 and the fourth resistor R4 in sequence, and finally returns to the ground terminal, thereby causing the second light-emitting diode LED2 to emit light.

[0059] In summary, through the above detection method in cooperation with the portable toner electrical property detection device 100, rapid, efficient and accurate identification of the electrical properties of toner in the production site can be achieved, thereby simplifying the toner electrical property detection and identification process, shortening the detection cycle, and improving production efficiency.

[0060] Finally, it should be emphasized that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A portable toner electrical property detection device, characterized in that, include: The fuselage is equipped with a detection area and an indicator area; The detection unit is located inside the body. The detection unit includes a power supply circuit and a negative toner detection circuit and a positive toner detection circuit electrically connected to the power supply circuit. The negative toner detection circuit includes a first sensing electrode and a first indicating element. The positive toner detection circuit includes a second sensing electrode and a second indicating element. The first sensing electrode and the second sensing electrode are both located in the detection area. The first indicating element and the second indicating element are both located in the indicating area.

2. The portable toner electrical property detection device according to claim 1, characterized in that: The first indicating element is a first light-emitting diode, and the second indicating element is a second light-emitting diode; The negatively charged toner detection circuit further includes a first resistor, a second resistor, and a PMOS transistor. The first resistor is connected between the first sensing electrode and the gate of the PMOS transistor. The source of the PMOS transistor is connected to the positive power supply terminal of the power supply circuit. The drain of the PMOS transistor is connected to the anode of the first light-emitting diode. The second resistor is connected between the cathode of the first light-emitting diode and the ground terminal. The positively charged toner detection circuit further includes a third resistor, a fourth resistor, and an NMOS transistor. The third resistor is connected between the second sensing electrode and the gate of the NMOS transistor. The drain of the NMOS transistor is connected to the positive power supply terminal, and the source of the NMOS transistor is connected to the anode of the second light-emitting diode. The fourth resistor is connected between the cathode of the second light-emitting diode and the ground terminal.

3. The portable toner electrical property detection device according to claim 2, characterized in that: The power supply circuit also includes a fifth resistor, a sixth resistor, and a power switch. The fifth resistor is connected between the ground terminal and the first terminal of the sixth resistor. The power switch is connected between the power supply and the second terminal of the sixth resistor. The positive power supply terminal is connected to the power supply through the power switch. The ground terminal is connected to the negative power supply terminal of the power supply circuit. The connection node between the fifth resistor and the sixth resistor is provided with a voltage divider power supply terminal.

4. The portable toner electrical property detection device according to claim 3, characterized in that: The detection unit further includes a functional test circuit, which includes a functional test button connected between the voltage divider power supply terminal and the gate of the PMOS transistor. The functional test button is mounted on the casing.

5. The portable toner electrical property detection device according to claim 4, characterized in that: The detection unit further includes a charge clearing circuit, which includes: A negative voltage reset button is connected between the gate of the PMOS transistor and the connection node between the power switch and the sixth resistor. A positive power reset button is connected between the gate of the NMOS transistor and the ground terminal.

6. The portable toner electrical property detection device according to claim 2, characterized in that: The first LED and the second LED emit different colors; and / or The fuselage has a first indicator mark at the first light-emitting diode and a second indicator mark at the second light-emitting diode.

7. The portable toner electrical property detection device according to any one of claims 1 to 6, characterized in that: The detection area is platform-shaped and has a sensing plane, and both the first sensing electrode and the second sensing electrode are disposed on the sensing plane; or The fuselage has a slot that penetrates the fuselage in a first direction. The slot includes a first wall portion and a second wall portion arranged opposite to each other. One of the first wall portion and the second wall portion is provided with the first sensing electrode, and the other is provided with the second sensing electrode. Both the first wall portion and the second wall portion are provided with the first sensing electrode and the second sensing electrode, with the first sensing electrode on the two wall portions being arranged opposite to each other, and the second sensing electrode on the two wall portions being arranged opposite to each other.

8. The portable toner electrical property detection device according to claim 7, characterized in that: The fuselage includes: The body has a detection area located on it. The body has a battery compartment in which a battery is detachably installed. The positive terminal of the battery is connected to the positive power supply terminal of the power circuit, and the negative terminal of the battery is connected to the negative power supply terminal of the power circuit. A compartment cover, which is detachably connected to the body, is used to seal the opening of the battery compartment.

9. The portable toner electrical property detection device according to claim 7, characterized in that: The device body has a built-in power supply unit. The positive terminal of the power supply unit is connected to the positive power supply terminal of the power circuit, and the negative terminal of the power supply unit is connected to the negative power supply terminal of the power circuit. The device is equipped with a charging interface or a wireless charging module, and the power unit can obtain power through the charging interface or the wireless charging module.

10. A detection method for a portable toner electrical property detection device, characterized in that: The portable toner electrical property detection device uses the portable toner electrical property detection device according to any one of claims 1 to 9, and the detection method includes: Friction is applied between the toner and the test rod. The detection plate with toner attached is placed in the detection area so that the detection unit can detect the electrical properties of the toner. When the toner is negatively charged, the negatively charged toner detection circuit of the detection unit acquires a first induced voltage and causes the first indicating element to indicate. When the toner is positively charged, the positively charged toner detection circuit of the detection unit acquires a second induced voltage and causes the second indicating element to indicate.

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