Control circuit with indication function and atomic gravimeter

Abstract

The utility model relates to the technical field of atomic gravimeters, in particular to a control circuit with an indication function and an atomic gravimeter, and the device comprises a control module, a driving module, a state indication module and a magnetic sensing assembly. The control output end of the control module is connected with the control input end of the driving module and is used for providing working voltage for the driving module; the current output end of the driving module is used for being connected with a motor so as to drive the motor to rotate; the input end of the state indication module is connected with the output end of the magnetic sensing assembly; the state indication module comprises a light-emitting assembly; the state indication module is used for turning on or turning off the light-emitting assembly under the action of high and low levels so as to indicate turning on or turning off of the light path switch. According to the utility model, the state indication module is arranged, and the light-emitting assembly is arranged in the state indication module and is used for indicating the on or off state of the light path, so that an operator can visually observe the state of the light path switch through the light-emitting assembly.

Description

Technical Field

[0001] This utility model relates to the field of atomic gravimeter technology, and in particular to a control circuit with indicating function and an atomic gravimeter. Background Technology

[0002] In the working system of an atomic gravimeter, one or more lasers are needed to perform a series of actions on atoms, such as cooling and pumping. During operation, these lasers act on the atoms intermittently and alternately, thus requiring optical switches to control whether a particular laser acts on an atom. When a laser is needed to act on an atom, the optical path is turned on; otherwise, the optical path is turned off to ensure that the atom cluster is not affected by the laser. During the development and debugging of the atomic gravimeter, operators often need to observe the on / off state of the optical switches, but in current technology, there is no intuitive way to observe the on / off state of the optical paths. Utility Model Content

[0003] The present invention aims to overcome the problem that the continuity or disconnection of the optical path cannot be directly observed in the existing technology.

[0004] This utility model is implemented as follows:

[0005] In a first aspect, this utility model provides a control circuit with an indication function, including a control module, a drive module, a status indication module, and a magnetic sensing component;

[0006] The control output terminal of the control module is connected to the control input terminal of the drive module, and is used to provide the drive module with operating voltage;

[0007] The current output terminal of the drive module is used to connect to the motor to drive the motor to rotate; wherein, the light-blocking plate that the motor rotates with is provided with a magnetic component;

[0008] The input terminal of the status indicator module is connected to the output terminal of the magnetic sensing component; the status indicator module includes a light-emitting component;

[0009] The magnetic sensing component is used to sense its relative position with the magnetic component in order to output high and low levels;

[0010] The status indication module is used to turn on or off the light-emitting component under the influence of the high or low level, so as to indicate the opening or closing of the optical path switch.

[0011] Preferably, the light-emitting component is an LED component, and the status indication module includes an LED driving circuit and the LED component connected in the LED driving circuit;

[0012] The input terminal of the LED driving circuit is connected to the output terminal of the magnetic sensing component. The LED driving circuit is used to drive the LED component to emit light when a high level is received.

[0013] Preferably, the motor is a DC motor, and the drive module includes a digital-to-analog converter, a voltage-to-current converter, and a reference current supply unit;

[0014] The control input terminal of the digital-to-analog converter is connected to the control output terminal of the control module;

[0015] The voltage output terminal of the digital-to-analog converter is connected to the voltage input terminal of the voltage-to-current converter.

[0016] The current output terminal of the voltage-to-current conversion unit and the current output terminal of the reference current supply unit are respectively connected to the two poles of the motor.

[0017] The reference current supply unit is used to generate a reference current to provide a reference current for the motor.

[0018] The digital-to-analog converter unit is used to convert the operating voltage into an analog voltage signal;

[0019] The voltage-to-current conversion unit is used to generate a drive current under the action of the voltage signal, so that the motor can rotate back and forth under the action of the drive current and the reference current.

[0020] Preferably, the digital-to-analog converter is an LTC2640 chip.

[0021] Preferably, it also includes a current detection module;

[0022] The input terminal of the current detection module is connected to the sampling output terminal of the drive module;

[0023] The output terminal of the current detection module is connected to the sampling input terminal of the control module;

[0024] The driving module is used to sample the driving current to obtain the sampled output current;

[0025] The current detection module is used to convert the sampled output current into a digital sampled current;

[0026] The control module is used to store the digital sampled current or output the digital sampled current to the host computer for the operator to view.

[0027] Preferably, the current detection module includes an analog-to-digital conversion unit and an amplification unit;

[0028] The input terminal of the amplification unit is connected to the sampling output terminal of the driving module;

[0029] The output of the amplification unit is connected to the input of the analog-to-digital conversion unit;

[0030] The output terminal of the analog-to-digital conversion unit is connected to the sampling input terminal of the control module;

[0031] The amplification unit is used to amplify the sampled output current to obtain an amplified sampled current;

[0032] The analog-to-digital conversion unit is used to convert the amplified sampling current into a digital sampling current.

[0033] Preferably, the analog-to-digital conversion unit is one or more of the AD7685ACPZ chip, AD7685BCPZRL7 chip, and AD7688BCPZRL7 chip.

[0034] Preferably, it also includes a trigger module;

[0035] The input terminal of the trigger module is used to connect to external signals;

[0036] The output terminal of the trigger module is connected to the trigger port of the control module;

[0037] The triggering module is used to generate a trigger signal to trigger the control module to work.

[0038] Preferably, the control module is one or more of the following chips: STM32H750VBT6, STM32H743VIT6, and STM32H750XB.

[0039] Secondly, this utility model provides an atomic gravimeter, which includes the control circuit with indication function described in the first aspect for controlling the on / off state of the laser optical path.

[0040] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model sets a status indicator module, and sets a light-emitting component in the status indicator module to indicate the open or closed state of the light path, so that the operator can intuitively observe the status of the light path switch through the light-emitting component, which facilitates debugging. Attached Figure Description

[0041] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0042] Figure 1 A schematic diagram of the architecture of a control circuit with an indication function provided for an embodiment of this utility model;

[0043] Figure 2 A schematic diagram illustrating the rotation process of a light-blocking plate in an optical switch, provided for an embodiment of this utility model;

[0044] Figure 3 A schematic diagram of a status indication module in a control circuit with indication function provided for an embodiment of this utility model;

[0045] Figure 4 A schematic diagram of a drive module in a control circuit with an indication function provided for an embodiment of this utility model;

[0046] Figure 5 A schematic diagram of a control module in a control circuit with an indication function provided for an embodiment of this utility model;

[0047] Figure 6 A schematic diagram of the architecture of a control circuit with an indication function provided for an embodiment of this utility model;

[0048] Figure 7 A schematic diagram of a current detection module in a control circuit with an indication function provided for an embodiment of this utility model;

[0049] Figure 8 A schematic diagram of the architecture of a control circuit with an indication function provided for an embodiment of this utility model;

[0050] Figure 9 A schematic diagram of a trigger module in a control circuit with an indication function provided for an embodiment of this utility model;

[0051] Figure 10 A schematic diagram of the architecture of a control circuit with an indication function provided for an embodiment of this utility model;

[0052] Figure 11 A schematic diagram of a trigger signal in a control circuit with an indication function provided for an embodiment of this utility model;

[0053] Figure 12 A schematic diagram of the delay time obtained from aging tests using an atomic gravimeter, provided as an embodiment of this utility model;

[0054] Figure 13 A schematic diagram of the opening delay time obtained from an aging test using an atomic gravimeter, provided as an embodiment of this utility model;

[0055] Figure 14A schematic diagram of the rise time obtained from an aging test using an atomic gravimeter, provided as an embodiment of this utility model;

[0056] Figure 15 This is a schematic diagram of the fall time obtained from an aging test using an atomic gravimeter, as provided in an embodiment of this utility model. Detailed Implementation

[0057] In the description of this utility model, the terms "inner", "outer", "longitudinal", "lateral", "upper", "lower", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not require that this utility model must be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0058] In this utility model, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0059] In this application, unless otherwise expressly specified and limited, the term "connection" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral part; it can be a direct connection or an indirect connection through an intermediate medium. Furthermore, the term "coupled" can refer to an electrical connection that enables signal transmission.

[0060] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0061] Example 1:

[0062] This utility model embodiment provides a control circuit with an indication function, such as Figure 1As shown, the system includes a control module, a drive module, a status indicator module, and a magnetic sensing component. The control output terminal of the control module is connected to the control input terminal of the drive module to provide operating voltage to the drive module. The current output terminal of the drive module is connected to a motor to drive the motor to rotate. A magnetic component is provided on a light-blocking plate that rotates with the motor. The input terminal of the status indicator module is connected to the output terminal of the magnetic sensing component. The status indicator module includes a light-emitting component. The magnetic sensing component senses its relative position to the magnetic component to output high and low levels. The status indicator module, under the influence of the high and low levels, turns the light-emitting component on or off to indicate the opening or closing of the optical path switch; for example, the light-emitting component is turned on when the level is high and turned off when the level is low. The control module is one or more of the following chips: STM32H750VBT6, STM32H743VIT6, and STM32H750XB.

[0063] The optical switch includes a light-blocking plate and a motor. A magnetic component is mounted on the light-blocking plate, and a magnetic sensing component is mounted on the housing or mounting base of the optical switch. The function of the light-blocking plate is to block light. Figure 2 As shown, the solid line and the dashed line represent two different positions during the rotation of the light-blocking plate. When the light-blocking plate rotates to different positions, the distance between the magnetic component and the magnetic sensing component is different, which makes the magnetic field strength sensed by the magnetic sensing component different, thus manifesting as high and low level. Therefore, the rotation position of the light-blocking plate can be determined by the high and low level, and then the opening or closing of the optical path switch can be determined.

[0064] It should be noted here that... Figure 2 This is merely a simplified schematic diagram illustrating the relationship between the open and closed states of the optical switch and the status indicator module, and is not intended to limit the scope of protection of this embodiment, nor does it imply that all components of the optical switch in actual use comply with the above. Figure 2 The arrangement is shown. Figure 1 Furthermore, the magnetic field lines of the magnetic components in the subsequent diagrams are for illustrative purposes only and do not necessarily represent the actual magnetic field lines of the magnetic components in use. Figure 1 Presented as shown.

[0065] In practical applications, optical switches with magnetic components and magnetic sensing components can be directly customized or based on conventional optical switches. Magnetic components are placed on the light-blocking plate, and magnetic sensing components are placed on the housing or mounting base of the optical switch. The external interface of the optical switch is adjusted accordingly, and the output line of the magnetic sensing component is led out to be used in conjunction with the control circuit with indicating function provided in this embodiment. For example, a magnetic sensor of model DRV5015 or SM351LT can be used as the magnetic sensing component.

[0066] This embodiment sets up a status indicator module, in which a light-emitting component is set up to indicate the open or closed state of the light path. This allows the operator to visually observe the status of the light path switch through the light-emitting component, which facilitates debugging.

[0067] In one alternative implementation, such as Figure 3 As shown, the light-emitting component is an LED component (i.e. Figure 3 LED6), the status indication module includes an LED driver circuit (i.e., composed of LEDs 6 in the LED driver module). Figure 3 The circuit consisting of resistors R158, R159, and transistor Q10, and the LED assembly connected in the LED driver circuit; the input terminal of the LED driver circuit (i.e., Figure 3 The HALL1 port is connected to the output of the magnetic sensing component, and the LED driving circuit is used to drive the LED component to emit light when a high level is received.

[0068] The LED driving circuit is used to drive the LED component to emit light when a high-level signal is received, and to prevent the LED component from emitting light when a low-level signal is received, thereby indicating the rotation position of the light-blocking plate and realizing the indication of the opening and closing of the light path switch. Here, we will still use... Figure 2 As shown in the example, when the light-blocking plate rotates to Figure 2 When the solid line is in position, the light path is open. At this time, the distance between the magnetic component and the magnetic sensing component is closest, the magnetic sensing component outputs a high level, the base current of transistor Q10 reaches the conduction threshold, the transistor conducts, and thus the LED component lights up to indicate the open state of the light path; when the light-blocking plate rotates to a position where the magnetic component is far away from the magnetic sensing component (e.g., ...), the light path is closed. Figure 2 When the position is indicated by the dashed line, the optical path is turned off, the magnetic sensing component outputs a low level, the base current of the transistor Q10 in the LED driver circuit cannot reach the conduction threshold, the transistor is in the cut-off state, the LED component does not emit light, and this is used to indicate the off state of the optical path.

[0069] In a preferred embodiment, the motor is a DC motor, such as... Figure 4As shown, the driving module includes a digital-to-analog converter (DAC), a voltage-to-current converter (VDC), and a reference current supply unit; the control input terminal of the DAC is connected to the control output terminal of the control module; in a specific application scenario, the DAC can be one or more of the following: an LTC2640 chip, a DAC7311 chip (such as the DAC7311IDCKR chip), and an HT7512ARTZ; wherein, Figure 4 The illustration uses an LTC2640 chip as the analog-to-digital converter. The DC motor can be a model RS-790SH-1 or XC38MS64 motor.

[0070] like Figure 5 As shown, the control module can be an STM32H750VBT6 chip. Figure 4 Pins 1 (CS), 2 (CLK), 3 (MOSI), and 8 (CLR) of the U25 are connected to... Figure 5 Pins 28, 29, 31, and 32 of U2 are connected to the digital-to-analog converter. The constant voltage output of the digital-to-analog converter is connected to the constant voltage input of the voltage-to-current converter; that is, pin 7 of U25 is connected to R43 of the voltage-to-current converter. The current output of the voltage-to-current converter (i.e., the M+ port) and the current output of the reference current supply unit (i.e., the M- port) are respectively connected to the two poles of the motor. In actual use, the current output of the voltage-to-current converter and the current output of the reference current supply unit are connected to the two poles of the motor through terminals. The terminals are used to provide external pins for the optical path switch, such as: the two control lines of the motor are respectively connected to pins 3 (M+) and 4 (M-) of terminal J4, and the three lines of the magnetic sensing component are respectively connected to pins 1 (HALL1) (i.e., the output of the magnetic sensing component), pin 5 (3.3V), and pin 6 (GND) of terminal J4. The reference current supply unit generates a reference current to provide a reference current for the motor; the digital-to-analog converter converts the operating voltage into an analog voltage signal; the voltage-to-current converter generates a drive current under the action of the voltage signal, so that the motor reciprocates under the action of the drive current and the reference reference current. This can be understood as: using the reference reference current as a 0A reference, the motor determines the positive and negative directions of the drive current, thereby determining the direction of motor rotation.

[0071] The driving current can be a periodically changing current, which can include four stages within one cycle: the first stage is a forward current that causes the motor to rotate in the first direction; the second stage is a small forward current stage that keeps the motor in a stable state; the third stage is a reverse current that causes the motor to rotate in the second direction; and the fourth stage is a small reverse current stage that keeps the motor in a stable state.

[0072] In a practical application scenario, both the voltage-to-current conversion unit and the reference current supply unit are voltage-to-current conversion circuits. The voltage-to-current conversion unit converts a voltage signal into a driving current, the magnitude of which is determined by the magnitude of the voltage signal. The operating voltage and voltage signal can be periodically changing voltages, thereby forming periodically changing currents, namely, a positive current phase, a positive small current sustaining phase, a negative current phase, and a negative small current sustaining phase. The reference current supply unit is used to convert a fixed voltage (i.e., Figure 4 The 24V connected to R50 is converted into a reference current, and the magnitude of the reference current is fixed. The amplifier chip used in the voltage-to-current conversion unit (i.e., Figure 4 The amplifier chip used in the U9 and reference current supply unit (i.e., U9) and the amplifier chip used in the reference current supply unit Figure 4 U12 in the above can all be OPA547 chips.

[0073] This embodiment uses a DC motor and a drive module to drive the DC motor, thereby avoiding the problems of step loss (i.e., less movement) and overshoot (i.e., more movement) that exist in stepper motors. It is also easy to drive, that is, it rotates in the forward direction when given a positive current and in the reverse direction when given a negative current, thereby achieving stable control of the optical path switch.

[0074] In one embodiment, such as Figure 6 As shown, it also includes a current detection module; the input terminal of the current detection module is connected to the sampling output terminal of the drive module; the output terminal of the current detection module is connected to the sampling input terminal of the control module; that is... Figure 7 Pins 6 to 8 of U13 (respectively CNV2, SDO2, and SCK2 signals) are respectively connected to Figure 5 Connect pins 51, 53, and 52 of the STM32H750VBT6.

[0075] The driving module is used to sample the driving current to obtain a sampled output current. Specifically, a sampling resistor (such as...) is connected in the driving module. Figure 4 R38 in the diagram), the sampling resistor can be connected in the voltage-to-current conversion unit to sample the drive current output by the voltage-to-current conversion unit. The two ends of the sampling resistor serve as the sampling output terminals of the drive module (i.e., R38 in the diagram). Figure 4 The IS+ and IS- terminals are used to output the sampled output current; the current detection module is used to convert the sampled output current into a digital sampled current; the control module is used to store the digital sampled current or output the digital sampled current to the host computer for the operator to view.

[0076] In a specific application scenario, such as Figure 7As shown, the current detection module includes an analog-to-digital conversion unit and an amplification unit; the input terminal of the amplification unit is connected to the sampling output terminal of the drive module; that is... Figure 7 The IS+ port of the intermediate amplifier unit and Figure 4 The IS+ port of the medium voltage-to-current conversion unit is connected, i.e. Figure 7 IS-port of intermediate amplifier unit and Figure 4 The intermediate voltage-to-current conversion unit is connected to the IS-port; the output terminal of the amplification unit is connected to the input terminal of the analog-to-digital conversion unit; the output terminal of the analog-to-digital conversion unit is connected to the sampling input terminal of the control module; the amplification unit is used to amplify the sampled output current to obtain an amplified sampled current; the analog-to-digital conversion unit is used to convert the amplified sampled current into a digital sampled current. In an optional embodiment, the analog-to-digital conversion unit is one or more of the AD7685ACPZ chip, AD7685BCPZRL7 chip, and AD7688BCPZRL7 chip.

[0077] In some embodiments, such as Figure 8 As shown, the device also includes a trigger module; the input terminal of the trigger module is used to connect to an external signal; the output terminal of the trigger module is connected to the trigger port of the control module; the trigger module is used to generate a trigger signal to trigger the control module to operate. The trigger module can be as follows: Figure 9 As shown, the output terminal of the trigger module is connected to the trigger port of the control module, which is manifested as follows: Figure 9 The TRIG port in Figure 5 The trigger module includes an external connection terminal J5 and an anti-interference unit. The input of the anti-interference unit is connected to an external signal via the external connection terminal, and the output of the anti-interference unit is connected to the trigger port of the control module. The anti-interference unit can be a chip such as SN74LV1T125. Figure 9 The U18 in the circuit is connected to the corresponding voltage divider circuit.

[0078] Based on the circuit described in Embodiment 1, the implementation process of the features of this utility model in relevant scenarios will be explained below using technical descriptions in related scenarios.

[0079] like Figure 10 As shown, this utility model provides a control circuit with an indication function. The control circuit with an indication function includes a trigger module, a control module, a drive module, a current detection module, a status indication module, and a monitoring module (which may be a host computer).

[0080] The control module includes a main control chip. This main control chip can be an MCU chip, an FPGA chip, or a combination of both. This embodiment uses the STM32H750VBT6 MCU chip as the main control chip. Figure 10 As shown. The main control chip is connected to the drive module, setting relevant parameters of the drive module, such as forward / reverse parameters, drive current, and drive time. The main control chip is also connected to the trigger module, receiving signals from the trigger module, i.e., trigger signals, such as... Figure 11 As shown, corresponding measures are taken to adjust the relevant parameters. The main control chip is connected to the current detection module to obtain the current information when the optical switch is working, monitor whether any abnormalities occur, and promptly stop the optical switch from working when the current is too high to avoid damage to the switching device due to prolonged abnormal operation and reduce maintenance costs.

[0081] In this embodiment, the main control chip sets the switching state of the optical path by directly receiving external level signals from the trigger module. The circuit diagram of the trigger module is shown below. Figure 9 As shown.

[0082] In this embodiment, the drive module uses a current-driven method to achieve the forward and reverse rotation of the motor, such as... Figure 4 As shown. U25 is a high-precision digital-to-analog converter chip, with pins 1 (CS), 2 (CLK), 3 (MOSI), and 8 (CLR) connected to... Figure 5 Pins 28, 29, 31, and 32 of U2 are connected to the U2 chip; pins 7 of chips U9 and U12 (VO_ENABLE_H and VO_ENABLE_L) are connected to pins 34 and 35 of U2, respectively. Resistor R38 is a current sampling resistor, with the upper end for signal IS+ and the lower end for signal IS-.

[0083] In this embodiment, the optical switch includes a motor, a light-blocking plate, and a magnetic sensor (i.e., a magnetic sensing component). The light-blocking plate is mounted on the motor shaft, and a small magnet (i.e., a magnetic component) is mounted on the light-blocking side of the light-blocking plate. When the motor moves the light-blocking plate to the light-blocking state, the small magnet approaches the sensor, and the sensor outputs a high-level signal. When the motor moves the light-blocking plate to the light-transmitting state, the small magnet moves away from the sensor, and the sensor outputs a low-level signal.

[0084] The two control wires of the motor are respectively connected to Figure 4 Pins 3 (M+) and 4 (M-) of the intermediate terminal J4 are connected to the sensor's three wires respectively. Figure 4 The middle terminal J4 has pins 1 (HALL1), 5 (3.3V), and 6 (GND).

[0085] In this embodiment, the status indication module circuit is as follows: Figure 3 As shown. One end of R158 is connected to... Figure 4 The middle terminal J4 is connected to pin 1 (HALL1) and the other end is connected to pin 1 of Q10. Pin 3 of Q10 is connected to indicator LED6. When the optical path is open, the HALL1 signal is high and indicator LED6 is lit; when the optical path is open, the HALL1 signal is low and indicator LED6 is off.

[0086] In this embodiment, the current detection module includes an analog-to-digital conversion unit and an amplification unit. For example... Figure 7 As shown, U13 is the high-precision AD acquisition chip AD7685ACPZ, and its pins 6 to 8 (CNV2 signal, SDO2 signal, and SCK2 signal, respectively) are connected to... Figure 5 Pins 51, 53, and 52 of the STM32H750VBT6 main control chip are connected.

[0087] The amplification unit uses instrumentation amplifier chip U15. One end of resistor R58 is connected to pin 1 of U15, and the other end is connected to... Figure 4 The upper end (IS+) of the sampling resistor R38; one end of resistor R65 is connected to pin 4 of U15, and the other end is connected to... Figure 4 The lower end (IS-) of the sampling resistor R38.

[0088] This embodiment features a simple driving method, high stability, fast switching response, rapid light on / off switching, and current detection function to protect the motor in a timely manner. This embodiment also indicates the switching of the light path on / off state, making it easy to determine whether the system is malfunctioning.

[0089] Example 2:

[0090] Based on Embodiment 1, this embodiment also provides an atomic gravimeter, including the control circuit with indication function described in Embodiment 1 for controlling the on / off state of the laser optical path. For the specific structural implementation process of the control circuit with indication function, please refer to Embodiment 1 and it will not be repeated here.

[0091] In one embodiment, as can be used Figure 11 The trigger signal shown activates the atomic gravimeter, enabling a stable, periodic output of the optical signal. Furthermore, this embodiment can achieve ten million optical path interruption aging tests. Figure 12 , Figure 13 , Figure 14 and Figure 15 This is a test chart from the aging test process. It maintains functional stability even after 2 million on / off cycles. Figure 12 The curve showing the change in turn-off delay time with the number of switching cycles. Figure 13 The curve shows the change in on delay time as a function of the number of switching cycles. Figure 14 The curve shows the rise time as a function of the number of switching cycles. Figure 15 The curve showing the change in falling edge time with the number of switching cycles shows that the time remains stable after 2 million switching cycles.

[0092] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A control circuit with an indication function, characterized in that, The control module, the driving module, the state indicating module and the magnetic sensing assembly are included. The control output end of the control module is connected with the control input end of the driving module, for providing working voltage for the driving module. The current output end of the driving module is used for being connected with the motor, to drive the motor to rotate; wherein, the magnetic assembly is arranged on the light shielding piece rotating with the motor. The input end of the state indicating module is connected with the output end of the magnetic sensing assembly; the state indicating module includes the light emitting assembly. The magnetic sensing assembly is used for sensing the relative position between the magnetic sensing assembly and the magnetic assembly, to output high and low levels. The state indicating module is used for opening or closing the light emitting assembly under the action of the high and low levels, to indicate the opening or closing of the light path switch.

2. The control circuit having an indication function according to claim 1, characterized by The light emitting assembly is the LED assembly, and the state indicating module includes the LED driving circuit and the LED assembly connected in the LED driving circuit. The input end of the LED driving circuit is connected to the output end of the magnetic sensing assembly, and the LED driving circuit is used for driving the LED assembly to emit light when receiving the high level.

3. The control circuit having an indication function according to claim 1, characterized by The motor is a direct current motor, and the driving module includes a digital-analog conversion unit, a voltage-current conversion unit and a reference current supply unit. The control input end of the digital-analog conversion unit is connected with the control output end of the control module. The voltage output end of the digital-analog conversion unit is connected with the voltage input end of the voltage-current conversion unit. The current output end of the voltage-current conversion unit and the current output end of the reference current supply unit are respectively connected with two poles of the motor. The reference current supply unit is used for generating a reference current, to provide a reference current for the motor. The digital-analog conversion unit is used for converting the working voltage into an analog voltage signal. The voltage-current conversion unit is used for generating a driving current under the action of the voltage signal, so that the motor reciprocatingly rotates under the action of the driving current and the reference current.

4. The control circuit having an indication function according to claim 3, characterized by The digital-analog conversion unit is one or more of an LTC2640 chip, a DAC7311 chip and an HT7512ARTZ.

5. The control circuit having an indication function according to claim 1, wherein Further including a current detection module; The input end of the current detection module is connected with the sampling output end of the driving module. The output end of the current detection module is connected with the sampling input end of the control module. The driving module is used for sampling the driving current to obtain a sampling output current. The current detection module is used for converting the sampling output current into a digital sampling current. The control module is used for storing the digital sampling current, or outputting the digital sampling current to an upper computer for an operator to view.

6. The control circuit having an indication function according to claim 5, wherein The current detection module includes an analog-digital conversion unit and an amplification unit. The input end of the amplification unit is connected to the sampling output end of the driving module. The output end of the amplification unit is connected to the input end of the analog-digital conversion unit. The output end of the analog-digital conversion unit is connected with the sampling input end of the control module. The amplification unit is used for amplifying the sampling output current to obtain an amplified sampling current. The analog-to-digital conversion unit is used for converting the amplified sampling current into a digital sampling current.

7. The control circuit with indication function according to claim 6, characterized in that, The analog-to-digital conversion unit is one or more of AD7685ACPZ chips, AD7685BCPZRL7 chips and AD7688BCPZRL7 chips.

8. The control circuit having an indication function according to claim 1, characterized by Further comprising a trigger module; The input end of the trigger module is used for connecting an external signal; The output end of the trigger module is connected with the trigger port of the control module; The trigger module is used for generating a trigger signal to trigger the control module to work.

9. The control circuit with indication function according to any one of claims 1-8, characterized in that, The control module is one or more of STM32H750VBT6 chips, STM32H743VIT6 chips and STM32H750XB chips.

10. An atomic gravimeter, characterized in that, The control circuit with the indication function is used for controlling the on-off of a laser light path. The control circuit with the indication function is used for controlling the on-off of a laser light path.

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