A flat-plate charge tester

Abstract

A flat-plate charge tester belongs to the field of charge detection. It includes a shell, a test plate electrode of standard size, a positive high-voltage component, a negative high-voltage component, a relay for positive high-voltage conduction / disconnection, a relay for negative high-voltage conduction / disconnection, a relay for conducting / disconnecting the test plate and the ground, an "L"-shaped packaging box, a high-voltage output socket, an electrostatic voltage detection unit, and a main control circuit unit. The test plate electrode is located above the shell, and the remaining components are located inside the shell. A network cable interface is provided on the shell. The various components are modularized and integrated into one, so the instrument size is greatly reduced, making it convenient for testing in small spaces. Since it has network communication and networking functions, it can realize networking functions through its own power supply and communication interface. The host computer can realize simultaneous inspection and testing operations on multiple eliminators, greatly improving test efficiency. It can be widely used in the design and manufacturing of flat-plate charge testers.

Description

Technical Field

[0001] The invention belongs to the field of charge detection, and in particular relates to a flat-plate charge tester for testing the performance of an electrostatic eliminator. Background Art

[0002] Ion fans, ion rods, ion nozzles / air guns / air snakes, and other static elimination products are widely used in various industrial production fields. They play a vital role in protecting products from the hazards of static electricity and ensuring product safety and protection management. Therefore, ensuring that these static elimination products have excellent static elimination performance is crucial; and the flat-plate charge tester is a key instrument for testing the static elimination performance of static eliminators.

[0003] There are two main types of existing flat-panel charge testers in terms of product structure: one is a split type and the other is an integrated type.

[0004] The structure of the split-type flat-plate charge tester is shown in Figure 1 As shown, the test plate and the instrument body (instrument circuit structure part) are set separately, and the test plate a and the instrument body c are connected through a coaxial cable b.

[0005] Alternatively, the integrated flat-panel charge tester disclosed in the Chinese invention patent application CN 106855595 B, dated April 5, 2019, and with the authorization announcement number CN 106855595, contains multiple components. Figure 2 As shown, the test plate a and the instrument circuit structure part are connected together through the connecting plug d to form a whole.

[0006] The two types of flat-panel charge testers mentioned above are both equipped with a display screen and operation buttons, which can be used to manually test the charge dissipation performance of the discharger at the site.

[0007] The existing technical solutions have the following technical defects:

[0008] 1) In the limited, narrow space inside equipment such as LCD screen laminating machines and circuit board placement machines, to ensure the static control effectiveness of the static eliminator installed therein, it is necessary to monitor the positive and negative ions (spatial static charge) generated by the static eliminator within the equipment space to ensure that the equipment space is in a state of electrostatic equilibrium and that it maintains a low static voltage value. Therefore, static monitoring of the internal space of the equipment is necessary. However, existing integrated flat-panel charge testers are large in size due to their inherent design of test data display and operation buttons, which is not conducive to online monitoring in a small space.

[0009] 2) Existing split-type flat-panel charge testers are only suitable for laboratory applications and are not convenient for on-site inspection and testing operations because of the presence of long coaxial cables and large instrument bodies, or the need to combine different components before use. Summary of the Invention

[0010] The technical problem to be solved by the present invention is to provide a flat-panel charge tester. Its components are modularized and integrated into a single unit. Testing is performed using a host computer, significantly reducing the instrument's size and facilitating testing in confined spaces. Furthermore, by connecting multiple testers to the host computer via a serial port server, the host computer can simultaneously perform inspections and tests on multiple dischargers, significantly improving testing efficiency.

[0011] The technical solution of the present invention is to provide a flat-panel charge tester, which is characterized in that the flat-panel charge tester includes the following components:

[0012] A housing, a standard-sized test plate electrode, a positive high-voltage assembly, a negative high-voltage assembly, a relay for positive high-voltage conduction / cutoff, a relay for negative high-voltage conduction / cutoff, a relay for conducting / cutting off the test plate and the ground, an "L"-shaped packaging box, a high-voltage output socket, a static voltage detection unit, and a main control circuit unit;

[0013] The test plate electrode is fixed to the upper cover of the shell through four insulating pillars, and a high-voltage plug is set on the plate electrode to be inserted into the high-voltage output socket;

[0014] The high-voltage output socket is integrated with the "L"-shaped packaging box, set in a corner of the shell bottom plate and extending out of the shell cover;

[0015] On one side of the housing bottom plate adjacent to the high-voltage output socket, a relay for positive high-voltage on / off and a positive high-voltage component are sequentially arranged in accordance with the electrical connection relationship. One high-voltage terminal of the high-voltage relay is electrically connected to the high-voltage output socket, and the other high-voltage terminal is electrically connected to the high-voltage output terminal of the positive high-voltage component.

[0016] On the other side of the housing bottom plate adjacent to the high voltage output socket, a relay for negative high voltage conduction / cutoff is arranged in sequence according to the electrical connection relationship, and a negative high voltage component is placed in an "L"-shaped packaging box;

[0017] One high-voltage terminal of the high-voltage relay is electrically connected to the high-voltage output socket, and the other high-voltage terminal is electrically connected to the high-voltage output terminal of the negative high-voltage component;

[0018] On either side of the bottom plate of the housing adjacent to the high-voltage output socket, a relay for testing the conduction / disconnection between the plate and the ground is arranged side by side with the positive or negative high-voltage relay; one high-voltage terminal of the relay is electrically connected to the high-voltage output socket, and the other high-voltage terminal is electrically connected to the ground terminal;

[0019] A window is provided at the center of the upper cover of the housing, and the window corresponds to and coincides with the static voltage detection window of the static voltage detection unit in the normal direction of the window; the static voltage detection unit detects the static voltage on the test plate through the window at the center of the upper cover;

[0020] The main control circuit unit is located below the static voltage detection unit and is fixed to the bottom plate of the housing. It is used to control the power supply to the high-voltage components and to control the on / off of the relay.

[0021] Specifically, when the main control circuit unit connects to the power supply of the negative high-voltage component and turns on the two high-voltage ends of the negative high-voltage relay, the negative high voltage will be applied to the test plate through the high-voltage output socket; before this, the main control circuit unit will cut off the power supply of the positive high-voltage component and turn off the two high-voltage ends of the positive high-voltage relay to avoid a short circuit between the positive and negative high voltages; and the main control circuit unit will control the relay used to connect / disconnect the test plate and the ground to turn off its two high-voltage ends to avoid a short circuit between the negative high voltage and the ground or the ground end.

[0022] Specifically, when the main control circuit unit controls the relay used to connect / disconnect the test plate to the ground, so that its two high-voltage ends are connected, the test plate electrode and the ground / ground wire end are hard-connected; before this, the main control circuit unit will cut off the power supply of the positive and negative high-voltage components, and turn off the two high-voltage ends of the positive and negative high-voltage relays to avoid a short circuit between the positive and negative high voltages and the ground.

[0023] Furthermore, a power supply and communication interface is provided at the center of one side panel of the flat-panel charge tester. Through this interface, the flat-panel charge tester is connected to the serial port server, and the serial port server is connected to the host computer; multiple flat-panel charge testers can be operated simultaneously through the host computer, and the dissipation performance test of multiple dissipators can be completed at one time.

[0024] The technical solution of the present invention further provides a method for performing a charge removal test using the above-mentioned flat-panel charge tester, which is characterized by:

[0025] 1) Set the positive or negative power-on voltage, positive or negative de-energization cut-off voltage, and positive or negative maximum de-energization time of the test plate on the host computer to determine the measurement indicators of the de-energization test;

[0026] 2) Sending positive or negative de-electrostatic test commands to the main control circuit unit and the electrostatic detection unit through the host computer;

[0027] 3) The main control circuit first controls the two high-voltage terminals of the high-voltage relay used to ground the test plate to be turned off, so that the test plate is suspended (electrically isolated from the ground) to prepare for power-on;

[0028] 4) The main control circuit connects to the power supply of the positive or negative high-voltage component, and the positive or negative high-voltage component can output a high voltage; and the setting / adjustment of the high-voltage amplitude is achieved by the main control circuit by regulating the supply voltage of the positive or negative high-voltage component, that is, adjusting the supply voltage of the high-voltage component through a digital potentiometer;

[0029] 5) The main control circuit controls the positive or negative high-voltage relay to turn on its two high-voltage terminals, and the positive or negative high-voltage electricity enters the high-voltage output socket and eventually reaches the test panel through the banana plug;

[0030] 6) When the test plate is positively or negatively charged, the electrostatic detection unit will monitor the plate voltage in real time and send the detection data to the host computer;

[0031] 7) The electrostatic detection unit will detect in real time whether the static voltage on the test plate reaches the positive power-on or negative power-on voltage setting value. If the set power-on voltage cannot be reached within the specified time, the host computer will issue a positive or negative power-on fault alarm signal;

[0032] 8) When the specified positive or negative power-on voltage is reached, the host computer will record the time the set static voltage value is maintained;

[0033] 9) After the set time is reached, the main control circuit controls the positive or negative high-voltage relay to cut off the conduction of its two high-voltage terminals, so that the charge remains on the test plate;

[0034] 10) Subsequently, the main control circuit cuts off the power supply to the positive or negative high-voltage component;

[0035] 11) When the tester enters the positive or negative de-electrification test state, the static detection unit will monitor the plate voltage in real time and send the detection data to the host computer;

[0036] 13) The host computer records the duration of the positive or negative de-energization action in real time. When the positive or negative de-energization time exceeds the set maximum de-energization time, the host computer issues a positive or negative de-energization timeout alarm signal;

[0037] 13) When the positive or negative de-energization test is completed, the host computer records and displays the time required for the static voltage to decrease to the set de-energization cut-off voltage.

[0038] Furthermore, when the high voltage on the test plate is applied, the main control circuit unit will first control the high-voltage relay to cut off the conduction of the two high-voltage ends, and then cut off the power supply of the high-voltage components; the instrument enters the de-energizing test state; the electrostatic detection unit will monitor the static voltage on the test plate in real time and send the detection data to the host computer, which will record the time required for the static voltage to be reduced to the de-energizing cut-off voltage.

[0039] Furthermore, after the high voltage is applied to the test plate, the electrostatic detection unit detects that the static voltage or the power-on voltage on the test plate is maintained at a set value for a set time.

[0040] The technical solution of the present invention further provides a method for performing a balanced voltage test with the above-mentioned flat-panel charge tester, which is characterized by:

[0041] 1) Set the balance voltage alarm threshold and balance voltage test duration on the host computer;

[0042] 2) Issue a balance voltage test command through the host computer;

[0043] 3) The main control circuit first cuts off the power supply of the high-voltage component to prevent excessive voltage from remaining on the flat electrode; then controls the positive and negative high-voltage relays to cut off the conduction of their two high-voltage ends respectively, completely shutting off the high-voltage path;

[0044] 4) The main control circuit controls the two high-voltage terminals of the high-voltage relay used for grounding the test plate to be turned on, so that the plate electrode is hard-connected to the ground, completely eliminating the residual "background" static charge on the plate;

[0045] 5) After the test plate is grounded, the electrostatic detection unit will monitor the plate voltage in real time to see if it is at zero potential, and send the detection data to the host computer;

[0046] 6) When the static voltage on the test plate is not zero, the host computer sends a ground fault alarm signal;

[0047] 7) The host computer records the time of maintaining zero potential. When the set time is reached, the main control circuit controls the high-voltage relay used for grounding the test plate to cut off the conduction of the two high-voltage terminals, so as to achieve the suspension of the test plate electrode;

[0048] 8) When the tester enters the balanced voltage test state, the electrostatic detection unit will monitor the plate voltage in real time and send the detection data to the host computer;

[0049] 9) When the balance voltage exceeds the set alarm threshold, the host computer will issue a balance voltage alarm signal;

[0050] 10) The host computer will record the duration of the test action in real time. When the test time is reached and the balance voltage test is completed, the host computer will record and display the real-time balance voltage value and the corresponding test time.

[0051] Specifically, when the grounding action of the test plate is completed, the main control circuit unit will control the high-voltage relay to cut off the conduction of the two high-voltage ends, cutting off the electrical connection between the plate electrode and the ground; the instrument enters the balance voltage test state; the electrostatic detection unit will monitor the static voltage / balance voltage on the test plate in real time, and send the detection data to the host computer, which will record the ion balance voltage within the set test time.

[0052] Furthermore, the completion of the grounding action of the test plate refers to the electrostatic detection unit detecting that the static voltage on the test plate is zero and maintained for a set time.

[0053] Compared with the prior art, the advantages of the present invention are:

[0054] 1. The integrated flat-panel charge tester described in this technical solution modularizes and integrates various components into one, and uses a host computer to perform testing operations on it, so the instrument size is greatly reduced, making it convenient for testing in a small space.

[0055] 2. The integrated flat-panel charge tester described in this technical solution can connect multiple testers to the host computer through the serial port server through its own power supply and communication interface. The host computer can then perform inspection and testing operations on multiple eliminators at the same time, greatly improving test efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] Figure 1 It is a structural diagram of an existing split-type flat-plate charge tester;

[0057] Figure 2 It is a structural diagram of an existing integrated flat-plate charge tester;

[0058] Figure 3 It is a schematic diagram of the structural decomposition of the flat-plate charge tester of the present invention;

[0059] Figure 4 This is a schematic diagram of the system topology of a network of multiple flat-panel charge testers constituting an online test module according to the present invention;

[0060] Figure 5 1. It is a schematic diagram of the structural decomposition of an embodiment of a flat-plate charge tester of the present invention;

[0061] Figure 6 This is a schematic diagram of the circuit module layout structure of the flat-panel charge tester of the present invention;

[0062] Figure 6-1 This is a schematic diagram of the connection relationship of the flat-panel charge tester modules of the present invention;

[0063] Figure 7 This is a flow chart of the charge removal test of the flat-plate charge tester of the present invention;

[0064] Figure 8 This is a flow chart of the balanced voltage test of the flat-plate charge tester of the present invention.

[0065] In the figure, a is the test plate, b is the coaxial cable, c is the instrument body, and d is the connecting plug;

[0066] 1 is the test plate electrode, 1-1 is the banana high-voltage plug, 2 is the insulating column, 3 is the high-voltage output socket, 4 is the shell cover, 5 is the static voltage detection unit, 6 is the main control board unit, 7 is the positive high-voltage component, 8 is the negative high-voltage component, 9 is the positive high-voltage relay, 10 is the negative high-voltage relay, 11 and 11' are relays used to test the conduction / disconnection between the plate and the ground, 12 is the packaging box, and 13 is the power supply and communication interface. DETAILED DESCRIPTION

[0067] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0068] The integrated flat-plate charge tester described in this technical solution includes: a shell, a standard-sized test flat-plate electrode, a positive high-voltage component, a negative high-voltage component, a relay for positive high-voltage conduction / cutoff, a relay for negative high-voltage conduction / cutoff, a relay for conducting / cutting off the test flat plate and the ground, an "L"-shaped packaging box, a high-voltage output socket, an electrostatic voltage detection unit, and a main control circuit unit.

[0069] The test flat plate electrode is fixed to the upper cover of the shell with four insulating columns, and a high-voltage plug is set on the flat plate electrode to be inserted into the high-voltage output socket.

[0070] The high-voltage output socket is integrated with the "L"-shaped packaging box, set at a corner of the shell bottom plate, and extends out of the shell cover.

[0071] On one side of the housing's bottom plate, adjacent to the high-voltage output socket, a relay for turning the positive high voltage on and off and a positive high-voltage assembly are positioned, one after the other, within an L-shaped enclosure. One high-voltage terminal of the high-voltage relay is electrically connected to the high-voltage output socket, while the other high-voltage terminal is electrically connected to the high-voltage output terminal of the positive high-voltage assembly.

[0072] On the other side of the housing's bottom plate, adjacent to the high-voltage output socket, a relay for turning the negative high voltage on and off and a negative high-voltage component are positioned in sequence, based on electrical connections. One high-voltage terminal of the high-voltage relay is electrically connected to the high-voltage output socket, while the other high-voltage terminal is electrically connected to the high-voltage output terminal of the negative high-voltage component.

[0073] On either side of the housing bottom plate adjacent to the high-voltage output socket, a relay for connecting or disconnecting the test plate from the ground is arranged side by side with the positive or negative high-voltage relay. One high-voltage terminal of this high-voltage relay is electrically connected to the high-voltage output socket, and the other high-voltage terminal is electrically connected to the ground terminal.

[0074] A window is provided at the center of the upper cover of the housing. This window coincides with the static voltage detection window of the static voltage detection unit in the normal direction of the window. The static voltage detection unit detects the static voltage (power-on voltage) on the test plate through this window at the center of the upper cover.

[0075] The main control circuit unit is located below the static voltage detection unit and is fixed to the bottom plate of the housing. It is used to control the power supply to the high-voltage components and to control the on / off of the relay.

[0076] When the main control circuit unit connects to the power supply of the positive high-voltage component and turns on the two high-voltage terminals of the positive high-voltage relay, the positive high voltage will be applied to the test plate through the high-voltage output socket; before this, the main control circuit unit will cut off the power supply of the negative high-voltage component and turn off the two high-voltage terminals of the negative high-voltage relay to avoid a short circuit between the positive and negative high voltages; and the main control circuit unit will control the relay used to connect / disconnect the test plate and the ground to turn off its two high-voltage terminals to avoid a short circuit between the positive high voltage and the ground (ground wire).

[0077] When the main control circuit unit connects to the power supply of the negative high-voltage component and turns on the two high-voltage terminals of the negative high-voltage relay, the negative high voltage will be applied to the test plate through the high-voltage output socket; before this, the main control circuit unit will cut off the power supply of the positive high-voltage component and turn off the two high-voltage terminals of the positive high-voltage relay to avoid a short circuit between the positive and negative high voltages; and the main control circuit unit will control the relay used to connect / disconnect the test plate and the ground to turn off its two high-voltage terminals to avoid a short circuit between the negative high voltage and the ground (ground wire).

[0078] When the main control circuit unit controls the relay used to connect / disconnect the test plate to the ground, so that its two high-voltage ends are connected, the test plate electrode and the ground wire (ground) are hard-connected; before this, the main control circuit unit will cut off the power supply of the positive and negative high-voltage components and turn off the two high-voltage ends of the positive and negative high-voltage relays to avoid a short circuit between the positive and negative high voltages and the ground.

[0079] A power supply and communication interface is set at the center of one side panel of the flat-panel charge tester of this technical solution. Through this interface, the flat-panel charge tester is connected to the serial port server, and the serial port server is then connected to the host computer; see Figure 3 As shown, multiple flat-plate charge testers can be operated simultaneously through the host computer, and the charge dissipation performance test of multiple eliminators can be completed at one time.

[0080] Among them, the de-energization test process can be briefly described as follows:

[0081] When high voltage is applied to the test plate, for example, if the electrostatic detection unit detects that the static voltage (power-on voltage) on the test plate remains at a set value for a set time, the main control circuit unit will first control the high-voltage relay to shut off the conduction between the two high-voltage terminals, and then cut off the power supply to the high-voltage components; the instrument enters the de-electrification test state. The electrostatic detection unit monitors the static voltage on the test plate in real time and sends the detection data to the host computer, which records the time required for the static voltage to decrease to the de-electrification cut-off voltage.

[0082] The balanced voltage test process can be briefly described as follows:

[0083] Once the test plate is grounded, for example, if the static voltage on the test plate is zero and remains zero for a set time, the main control circuit unit controls the high-voltage relay to disconnect the two high-voltage terminals, severing the electrical connection between the plate electrodes and the ground. The instrument then enters the equilibrium voltage test state. The static voltage detection unit monitors the static voltage (equilibrium voltage) on the test plate in real time and transmits the detection data to the host computer, which records the ion equilibrium voltage for the set test duration.

[0084] Specifically, the structure of the integrated flat-panel charge tester of the present invention is as follows:

[0085] 1. See Figure 3 、 Figure 5 、 Figure 6 、 Figure 6-1 As shown, the test flat electrode 1 is fixed to the upper cover plate 4 of the shell by four insulating columns 2. A banana high-voltage plug 1-1 is set on the flat electrode to be inserted into the high-voltage output socket 3 located in the packaging box 12.

[0086] 2. The packaging box 12 is an L-shaped packaging box, and the high-voltage output socket 3 is integrally formed with it and is located at the intersection (or angle) of the two sides of its L-shaped structure. The packaging box is set at a corner of the bottom plate of the shell.

[0087] 3. Place the relay 9 for positive high voltage on / off and the positive high voltage assembly 7 in the packaging box 12 on the side of the housing bottom plate adjacent to the high voltage output socket. One high voltage terminal of the positive high voltage relay 9 is electrically connected to the high voltage output socket 3, and the other high voltage terminal is electrically connected to the high voltage output terminal of the positive high voltage assembly 7.

[0088] 4. Place the relay 10 for negative high voltage on / off and the negative high voltage assembly 8 in the packaging box 12, located on the other side of the housing bottom plate and adjacent to the high voltage output socket. One high voltage terminal of the negative high voltage relay 10 is electrically connected to the high voltage output socket 3, and the other high voltage terminal is electrically connected to the high voltage output terminal of the negative high voltage assembly 8.

[0089] 5. A relay 11 (11') for connecting / disconnecting the test plate to the ground is placed on either side of the package box 12, side by side with the positive or negative high-voltage relay 9 or 10. One high-voltage terminal of this high-voltage relay is electrically connected to the high-voltage output socket 3, and the other high-voltage terminal is electrically connected to the ground wire.

[0090] 6. A window 4-1 is provided at the center of the housing upper cover 4. This window coincides with the static voltage detection window 5-1 of the static voltage detection unit 5 in the normal direction of the window. The static voltage detection unit 5 detects the static voltage (power-on voltage) on the test plate through the window 4-1 at the center of the upper cover.

[0091] 7. The main control board unit 6 is located below the static voltage detection unit 5 and is fixed to the bottom plate of the housing. It is used to control the power supply of the high-voltage components 7 and 8, and to control the on / off of the relays 9, 10, and 11.

[0092] 8. When the host computer issues a positive de-energization test command, the main control circuit unit 6 will connect the power supply of the positive high-voltage component 7 and turn on the two high-voltage ends of the positive high-voltage relay 9, and the positive high voltage will be applied to the test plate 1 through the high-voltage output socket 3 and the banana plug 1-1; before this, the main control circuit unit 6 will cut off the power supply of the negative high-voltage component 8 and turn off the two high-voltage ends of the negative high-voltage relay 10 to avoid a short circuit between the positive and negative high voltages; and the main control circuit unit 6 will control the relay 11 used to connect / disconnect the test plate and the ground, so that its two high-voltage ends are turned off to avoid a short circuit between the positive high voltage and the ground (ground wire), thereby damaging the high-voltage component.

[0093] 9. When the host computer issues a negative de-energization test command, the main control circuit unit 6 connects the power supply of the negative high-voltage component 8 and turns on the two high-voltage ends of the negative high-voltage relay 10, and the negative high voltage will be applied to the test plate 1 through the high-voltage output socket 3 and the banana plug 1-1; before this, the main control circuit unit 6 will cut off the power supply of the positive high-voltage component 7 and turn off the two high-voltage ends of the positive high-voltage relay 9 to avoid a short circuit between the positive and negative high voltages; and the main control circuit unit 6 will control the relay 11 used to connect / disconnect the test plate and the ground, so that its two high-voltage ends are turned off to avoid a short circuit between the negative high voltage and the ground (ground wire), thereby damaging the high-voltage component.

[0094] 10. When the host computer issues a balanced voltage test command, the main control circuit unit 6 controls the relay 11 (11') used to connect / disconnect the test plate to the ground, so that its two high-voltage ends are connected, and the test plate electrode 1 is hard-connected to the ground wire (earth); before this, the main control circuit unit 6 will cut off the power supply of the positive and negative high-voltage components 7 and 8, and turn off the two high-voltage ends of the positive and negative high-voltage relays 9 and 10 to avoid a short circuit between the positive and negative high voltages and the ground, thereby damaging the high-voltage components.

[0095] 11. A power supply and communication interface 13 is provided at the center of one side panel of the flat-panel charge tester of this technical solution. Through this interface, the flat-panel charge tester is connected to the serial port server (the serial port server has its own power supply and can power the tester), and the serial port server is then connected to the host computer. Figure 4 As shown in the figure, when multiple flat-panel charge testers are connected to the serial port server, multiple flat-panel charge testers can be operated simultaneously through the host computer, and the charge dissipation performance test of multiple charge dissipators can be completed at one time.

[0096] 12. The complete de-charge test process of the flat-plate charge tester of this technical solution is shown in Figure 7 , as detailed below:

[0097] 1) Set the positive or negative power-on voltage, positive or negative de-energization cut-off voltage, and positive or negative maximum de-energization time of the test plate on the host computer to determine the measurement indicators of the de-energization test.

[0098] 2) Send a positive or negative de-electrostatic test command to the main control circuit unit and the electrostatic detection unit through the host computer.

[0099] 3) The main control circuit first controls the two high-voltage terminals of the high-voltage relay used to ground the test plate to be turned off, so that the test plate is suspended (electrically isolated from the ground) to prepare for power-on.

[0100] 4) The main control circuit connects to the power supply of the positive or negative high-voltage component, causing it to output a high voltage. The main control circuit sets / adjusts the high-voltage amplitude by regulating the supply voltage of the positive or negative high-voltage component. Specifically, a digital potentiometer can be used to adjust the supply voltage of the high-voltage component.

[0101] 5) The main control circuit controls the positive or negative high-voltage relay to turn on its two high-voltage terminals, and the positive or negative high-voltage electricity enters the high-voltage output socket and eventually reaches the test panel through the banana plug.

[0102] 6) When the test plate is positively or negatively charged, the electrostatic detection unit will monitor the plate voltage in real time and send the detection data to the host computer.

[0103] 7) The electrostatic detection unit will detect in real time whether the static voltage on the test plate reaches the positive power-on or negative power-on voltage setting value. When the set power-on voltage cannot be reached within the specified time, the host computer will issue a positive or negative power-on fault alarm signal.

[0104] 8) When the specified positive power-on or negative power-on voltage is reached, the host computer will record the time for maintaining the set static voltage value (positive power-on or negative power-on voltage setting value).

[0105] 9) After the set time is reached, the main control circuit controls the positive or negative high-voltage relay to cut off the conduction of its two high-voltage terminals, so that the charge remains on the test plate.

[0106] 10) The main control circuit then cuts off the power supply to the positive or negative high-voltage components.

[0107] 11) When the tester enters the positive or negative de-electrification test state, the electrostatic detection unit will monitor the plate voltage in real time and send the detection data to the host computer.

[0108] 13) The host computer records the duration of the positive or negative de-energization action in real time. When the positive or negative de-energization time exceeds the set maximum de-energization time, the host computer sends a positive or negative de-energization timeout alarm signal.

[0109] 13) When the positive or negative de-energization test is completed, the host computer records and displays the time required for the static voltage to decrease to the set de-energization cut-off voltage.

[0110] The complete balanced voltage test process of the flat-plate charge tester of this technical solution is shown in Figure 8 , as detailed below:

[0111] 1) Set the balance voltage alarm threshold and balance voltage test duration on the host computer.

[0112] 2) Issue a balance voltage test command through the host computer.

[0113] 3) The main control circuit first cuts off the power supply of the high-voltage components to prevent excessive voltage (excessive static charge) from remaining on the flat electrodes; then it controls the positive and negative high-voltage relays to respectively cut off the conduction of their two high-voltage ends, completely shutting off the high-voltage path.

[0114] 4) The main control circuit controls the two high-voltage terminals of the high-voltage relay used for grounding the test plate to be turned on, so that the plate electrode is hard-connected to the ground, completely eliminating the residual "background" static charge on the plate.

[0115] 5) After the test plate is grounded, the electrostatic detection unit will monitor the plate voltage in real time to see if it is at zero potential, and send the detection data to the host computer.

[0116] 6) When the static voltage on the test plate is not zero, the host computer sends a ground fault alarm signal.

[0117] 7) The host computer records the time of maintaining zero potential. When the set time is reached, the main control circuit controls the high-voltage relay used for grounding the test plate to cut off the conduction of the two high-voltage terminals to achieve the suspension of the test plate electrode.

[0118] 8) When the tester enters the balanced voltage test state, the electrostatic detection unit will monitor the plate voltage in real time and send the detection data to the host computer.

[0119] 9) When the balance voltage exceeds the set alarm threshold, the host computer will issue a balance voltage alarm signal.

[0120] 10) The host computer will record the duration of the test action in real time. When the test time is reached and the balance voltage test is completed, the host computer will record and display the real-time balance voltage value and the corresponding test time.

[0121] The technical solution of the present invention modularizes the various components of the flat-panel charge tester and integrates them into one, so the volume of the instrument is greatly reduced, which is convenient for testing in a small space; at the same time, since the flat-panel charge tester has network communication and networking functions, multiple testers can be connected to the host computer through the serial port server through its own power supply and communication interface. The host computer can then realize simultaneous inspection and testing operations on multiple discharge devices, greatly improving the testing efficiency.

[0122] The present invention can be widely used in the field of design and manufacture of flat-plate charge testers.

Claims

1. A flat-plate charge tester, characterized in that The flat panel charge tester consists of the following components: A housing, a standard-sized test plate electrode, a positive high-voltage assembly, a negative high-voltage assembly, a relay for connecting and disconnecting the positive high-voltage, a relay for connecting and disconnecting the negative high-voltage, a relay for connecting and disconnecting the test plate and the ground, an "L"-shaped packaging box, a high-voltage output socket, a static voltage detection unit, and a main control circuit unit; The test plate electrode is fixed to the upper cover of the shell through four insulating pillars, and a high-voltage plug is set on the plate electrode to be inserted into the high-voltage output socket; The high-voltage output socket is integrated with the "L"-shaped packaging box, set in a corner of the shell bottom plate and extending out of the shell cover; On one side of the housing bottom plate adjacent to the high-voltage output socket, a relay for conducting and cutting off the positive high voltage and a positive high-voltage component are sequentially arranged according to the electrical connection relationship; one high-voltage terminal of the high-voltage relay is electrically connected to the high-voltage output socket, and the other high-voltage terminal is electrically connected to the high-voltage output terminal of the positive high-voltage component; On the other side of the housing bottom plate adjacent to the high voltage output socket, a relay for conducting and cutting off the negative high voltage is arranged in sequence according to the electrical connection relationship, and a negative high voltage component is placed in an "L"-shaped packaging box; One high-voltage terminal of the high-voltage relay is electrically connected to the high-voltage output socket, and the other high-voltage terminal is electrically connected to the high-voltage output terminal of the negative high-voltage component; On either side of the bottom plate of the housing adjacent to the high-voltage output socket, a relay for conducting and disconnecting the test plate from the ground is arranged side by side with the positive or negative high-voltage relay; one high-voltage terminal of the relay is electrically connected to the high-voltage output socket, and the other high-voltage terminal is electrically connected to the ground terminal; A window is provided at the center of the upper cover of the housing, and the window corresponds to and coincides with the static voltage detection window of the static voltage detection unit in the normal direction of the window; the static voltage detection unit detects the static voltage on the test plate through the window at the center of the upper cover; The main control circuit unit is located below the static voltage detection unit and is fixed to the bottom plate of the housing. It is used to control the power supply to the high-voltage components and to control the on and off of the relay.

2. The flat-plate charge tester according to claim 1, characterized in that When the main control circuit unit connects to the power supply of the negative high-voltage component and turns on the two high-voltage ends of the negative high-voltage relay, the negative high voltage will be applied to the test plate through the high-voltage output socket; before this, the main control circuit unit will cut off the power supply of the positive high-voltage component and turn off the two high-voltage ends of the positive high-voltage relay to avoid a short circuit between the positive and negative high voltages; and the main control circuit unit will control the relay used to connect and disconnect the test plate and the ground, so that its two high-voltage ends are turned off to avoid a short circuit between the negative high voltage and the ground or the ground terminal.

3. The flat-plate charge tester according to claim 1, characterized in that When the main control circuit unit controls the relay used to connect and disconnect the test plate from the ground, so that its two high-voltage ends are connected, the test plate electrode is hard-connected to the ground or the ground wire end; before this, the main control circuit unit will cut off the power supply of the positive and negative high-voltage components and turn off the two high-voltage ends of the positive and negative high-voltage relays to avoid a short circuit between the positive and negative high voltages and the ground.

4. The flat-plate charge tester according to claim 1, characterized in that A power supply and communication interface is provided at the center of one side panel of the flat-panel charge tester. Through this interface, the flat-panel charge tester is connected to the serial port server, and the serial port server is connected to the host computer. Multiple flat-panel charge testers can be operated simultaneously through the host computer, and the dissipation performance test of multiple dissipators can be completed at one time.

5. A method for performing a charge removal test using the flat-panel charge tester according to claim 1, characterized in that: 1) Set the positive or negative power-on voltage, positive or negative de-energization cut-off voltage, and positive or negative maximum de-energization time of the test plate on the host computer to determine the measurement indicators of the de-energization test; 2) Sending positive or negative de-electrostatic test commands to the main control circuit unit and the electrostatic detection unit through the host computer; 3) The main control circuit first controls the two high-voltage terminals of the high-voltage relay used to ground the test plate to be turned off, so that the test plate is suspended in the air and electrically isolated from the ground, ready for power-on; 4) The main control circuit connects to the power supply of the positive or negative high-voltage component, and the positive or negative high-voltage component can output a high voltage; and the setting and adjustment of the high-voltage amplitude is achieved by the main control circuit by regulating the supply voltage of the positive or negative high-voltage component, that is, adjusting the supply voltage of the high-voltage component through a digital potentiometer; 5) The main control circuit controls the positive or negative high-voltage relay to turn on its two high-voltage terminals, and the positive or negative high-voltage electricity enters the high-voltage output socket and eventually reaches the test panel through the banana plug; 6) When the test plate is positively or negatively charged, the electrostatic detection unit will monitor the plate voltage in real time and send the detection data to the host computer; 7) The electrostatic detection unit will detect in real time whether the static voltage on the test plate reaches the positive power-on or negative power-on voltage setting value. If the set power-on voltage cannot be reached within the specified time, the host computer will issue a positive or negative power-on fault alarm signal; 8) When the specified positive or negative power-on voltage is reached, the host computer will record the time the set static voltage value is maintained; 9) After the set time is reached, the main control circuit controls the positive or negative high-voltage relay to cut off the conduction of its two high-voltage terminals, so that the charge remains on the test plate; 10) Subsequently, the main control circuit cuts off the power supply to the positive or negative high-voltage component; 11) When the tester enters the positive or negative de-electrification test state, the static detection unit will monitor the plate voltage in real time and send the detection data to the host computer; 12) The host computer records the duration of the positive or negative de-energization action in real time. When the positive or negative de-energization time exceeds the set maximum de-energization time, the host computer issues a positive or negative de-energization timeout alarm signal; 13) When the positive or negative de-energization test is completed, the host computer records and displays the time required for the static voltage to decrease to the set de-energization cut-off voltage.

6. The method for performing a discharge test according to claim 5, wherein When the high voltage is applied to the test plate, the main control circuit unit will first control the high-voltage relay to cut off the conduction between the two high-voltage terminals, and then cut off the power supply to the high-voltage components; the instrument enters the de-electrification test state; the electrostatic detection unit will monitor the static voltage on the test plate in real time and send the detection data to the host computer, which will record the time required for the static voltage to decrease to the de-electrification cut-off voltage.

7. The method for performing a discharge test according to claim 5, wherein When the high voltage is applied to the test plate, the static voltage or the power-on voltage on the test plate is detected by the static detection unit and maintained at a set value for a set time.

8. A method for performing a balanced voltage test using the flat-plate charge tester of claim 1, characterized by: 1) Set the balance voltage alarm threshold and balance voltage test duration on the host computer; 2) Issue a balance voltage test command through the host computer; 3) The main control circuit first cuts off the power supply of the high-voltage component to prevent excessive voltage from remaining on the flat electrode; then controls the positive and negative high-voltage relays to cut off the conduction of their two high-voltage ends respectively, completely shutting off the high-voltage path; 4) The main control circuit controls the two high-voltage terminals of the high-voltage relay used for grounding the test plate to be turned on, so that the plate electrode is hard-connected to the ground, completely eliminating the residual "background" static charge on the plate; 5) After the test plate is grounded, the electrostatic detection unit will monitor the plate voltage in real time to see if it is at zero potential, and send the detection data to the host computer; 6) When the static voltage on the test plate is not zero, the host computer sends a ground fault alarm signal; 7) The host computer records the time of maintaining zero potential. When the set time is reached, the main control circuit controls the high-voltage relay used for grounding the test plate to cut off the conduction of the two high-voltage terminals, so as to achieve the suspension of the test plate electrode; 8) When the tester enters the balanced voltage test state, the electrostatic detection unit will monitor the plate voltage in real time and send the detection data to the host computer; 9) When the balance voltage exceeds the set alarm threshold, the host computer will issue a balance voltage alarm signal; 10) The host computer will record the duration of the test action in real time. When the test time is reached and the balance voltage test is completed, the host computer will record and display the real-time balance voltage value and the corresponding test time.

9. The method for balanced voltage testing according to claim 8, characterized in that When the test plate is grounded, the main control circuit unit will control the high-voltage relay to cut off the conduction of the two high-voltage terminals, cutting off the electrical connection between the plate electrode and the ground; the instrument enters the balance voltage test state; the electrostatic detection unit will monitor the static voltage or balance voltage on the test plate in real time, and send the detection data to the host computer, which will record the ion balance voltage within the set test time.

10. The method for balanced voltage testing according to claim 8, characterized in that When the test plate grounding action is completed, it means that the static voltage on the test plate is detected by the static detection unit to be zero and maintained for a set time.

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