CN210346870U - Automatic material taking and detecting device for vending cabinet - Google Patents
Automatic material taking and detecting device for vending cabinet Download PDFInfo
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- CN210346870U CN210346870U CN201921726085.6U CN201921726085U CN210346870U CN 210346870 U CN210346870 U CN 210346870U CN 201921726085 U CN201921726085 U CN 201921726085U CN 210346870 U CN210346870 U CN 210346870U
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Abstract
The utility model discloses an automatic sales counter material taking detection device, which comprises a controller and a gravity sensing module arranged below a material tray, wherein the gravity sensing module comprises a gravity detection amplifying circuit, a signal conditioning circuit and a clamping voltage stabilizing circuit, a gravity sensor in the gravity detection amplifying circuit detects the weight of goods on the material tray in real time, and sends a detection signal into a combined pipe for rapid amplification after being stabilized by an MOS (metal oxide semiconductor) pipe Q1, so that the signal output of the gravity sensor has good stability; the signal conditioning circuit stabilizes the output signal of the combined tube by using an operational amplifier compensation principle, and effectively avoids the influence of vibration on the precision of the gravity sensing module when the cabinet door is closed; the clamp voltage stabilizing circuit is adopted to clamp and output the output signal of the signal conditioning circuit, so that the damage of the abnormal gravity detection signal to the controller is effectively prevented, and the service life of the control panel is prolonged.
Description
Technical Field
The utility model relates to an automatic sales counter technical field especially relates to an automatic sales counter gets material detection device.
Background
The existing automatic vending cabinet based on mobile payment realizes the code scanning payment function through the cooperation of a cloud payment system and a vending machine control panel. After a consumer selects commodities and pays the commodities by scanning codes through WeChat, the cloud system issues a door opening instruction to the control panel through the GPRS network, the control panel controls the electric control lock on the corresponding commodity cabinet door to flick the cabinet door, and then the consumer takes out a target commodity. After the cabinet door is closed, the control panel obtains the weight difference before and after getting goods on the material tray according to the output value variation of the gravity sensing module, and then learns the commodity type, weight and quantity that the consumer got goods. However, for some lighter goods, such as chips, bread, paper towels, etc., the gravity sensing module is required to have higher sensitivity, but the existing gravity sensing module with higher sensitivity is easily interfered by the outside, for example, the vibration when the cabinet door is closed can affect the precision of the gravity sensing module, which results in inaccurate measurement and easily causes the occurrence of wrong orders. And the situation that the material tray is beaten or pressed is inevitable when a consumer gets goods, and the huge pressure can cause the output value of the gravity sensing module to be too large, so that the service life of the control panel is influenced.
So the utility model provides a new scheme to solve the problem.
SUMMERY OF THE UTILITY MODEL
In view of the above situation, in order to overcome the defects of the prior art, an object of the present invention is to provide a material-taking detection device for an automatic vending cabinet.
The technical scheme for solving the problem is as follows: the utility model provides an automatic sales counter gets material detection device, includes the controller and sets up in the gravity-feed tank below gravity-feed tank's gravity-feed tank module, gravity-feed tank module includes gravity detection amplifier circuit, signal conditioning circuit and clamp voltage stabilizing circuit, gravity detection amplifier circuit includes gravity sensor, and gravity sensor's output signal sends into the built-up tube after MOS pipe Q1 is stable and enlargies fast, signal conditioning circuit carries out the fortune to the output signal of built-up tube and puts the compensation, improves the stability of signal, and last clamp voltage stabilizing circuit utilizes diode clamp principle to carry out the amplitude limiting output with the signal extremely in the controller, guarantees that detection signal does not exceed the input allowable value of controller.
Preferably, the gravity detection amplifying circuit includes a resistor R1, one end of the resistor R1 is connected to the output end of the gravity sensor, the other end of the resistor R1 is connected to one ends of the resistors R2, R3 and the capacitor C1, the other ends of the resistor R2 and the capacitor C1 are grounded, the other end of the resistor R3 is connected to the gate of the MOS transistor Q1, the drain of the MOS transistor Q1 is connected to the +5V power supply, the source of the MOS transistor Q1 is connected to one end of the resistor R4 and the input end of the combination tube, and the other end of the resistor R4 is grounded.
Preferably, the combination tube comprises triodes VT1 and VT2, the base electrode of the triode VT1 is connected with the source electrode of the MOS tube Q1, the collector electrode of the triode VT1 is connected with the emitter electrode of the VT2 to supply +5V, the emitter electrode of the triode VT1 and the base electrode of the VT2 are grounded through a resistor R5, and the collector electrode of the triode VT2 is grounded through a resistor R6 and a capacitor C2 which are connected in parallel.
Preferably, the signal conditioning circuit includes an operational amplifier AR1, a non-inverting input terminal of the operational amplifier AR1 is connected to a collector of the transistor VT2, an inverting input terminal of the operational amplifier AR1 is connected to an output terminal of the operational amplifier AR1 through a resistor R7 and a capacitor C3 which are connected in parallel, and an inverting input terminal of the operational amplifier AR1 is further grounded through a resistor R8.
Preferably, the clamping voltage stabilizing circuit comprises diodes D1 and D2, the anode of the diode D1 and the cathode of the diode D2 are connected with the output end of the operational amplifier AR1, the cathode of the voltage stabilizing diode DZ1 and the input end of the controller, the cathode of the diode D1 is connected with a +5V power supply, and the anode of the diode D2 and the anode of the voltage stabilizing diode DZ1 are connected with the ground in parallel.
Through the technical scheme, the beneficial effects of the utility model are that:
1. the gravity sensor detects the weight of the commodity on the material tray in real time, and sends a detection signal to the combined pipe for rapid amplification after being stabilized by the MOS pipe Q1, so that the signal output of the gravity sensor has good stability;
2. the signal conditioning circuit stabilizes the output signal of the combined tube by using an operational amplifier compensation principle, and effectively avoids the influence of vibration on the precision of the gravity sensing module when the cabinet door is closed;
3. the clamp voltage stabilizing circuit is adopted to clamp and output the output signal of the signal conditioning circuit, so that the damage of the abnormal gravity detection signal to the controller is effectively prevented, and the service life of the control panel is prolonged.
Drawings
Fig. 1 is a connection diagram of the gravity sensing module of the present invention.
Fig. 2 is a schematic circuit diagram of the present invention.
Detailed Description
The foregoing and other technical matters, features and effects of the present invention will be apparent from the following detailed description of the embodiments, which is to be read in connection with the accompanying drawings 1 to 2. The structural contents mentioned in the following embodiments are all referred to the attached drawings of the specification.
Exemplary embodiments of the present invention will be described below with reference to the accompanying drawings.
The utility model provides an automatic sales counter gets material detection device, includes the controller and sets up in the gravity-feed tank below gravity-feed tank and responds to the module, and gravity-feed tank responds to the module and includes gravity detection amplifier circuit, signal conditioning circuit and clamp voltage stabilizing circuit. The gravity detection amplifying circuit comprises a gravity sensor P1, an output signal of the gravity sensor P1 is stabilized by an MOS (metal oxide semiconductor) tube Q1 and then sent into the combined tube for rapid amplification, the signal conditioning circuit carries out operational amplification compensation on the output signal of the combined tube, the stability of the signal is improved, the clamping voltage stabilizing circuit carries out amplitude limiting output on the signal to the controller by using the diode clamping principle, and the detection signal is ensured not to exceed the input allowable value of the controller.
In order to ensure that the gravity sensing module has good sensitivity and certain anti-interference performance, a gravity detection amplifying circuit is designed to process an output signal of the gravity sensor P1. The gravity detection amplifying circuit comprises a resistor R1, one end of a resistor R1 is connected with the output end of a gravity sensor P1, the other end of the resistor R1 is connected with one ends of resistors R2, R3 and a capacitor C1, the other ends of the resistor R2 and the capacitor C1 are grounded, the other end of a resistor R3 is connected with the grid electrode of an MOS transistor Q1, the drain electrode of the MOS transistor Q1 is connected with a +5V power supply, the source electrode of the MOS transistor Q1 is connected with one end of a resistor R4 and the input end of a combined transistor, and the other end of the resistor R4 is grounded. The resistor R2 and the capacitor C1 form RC filtering to perform low-pass processing on a detection signal output by the gravity sensor P1, external clutter interference is reduced, and then the MOS tube Q1 improves the waveform of the detection signal by using good temperature characteristics, so that the signal output by the gravity sensor P1 has good stability.
The detection signal output by the gravity sensor P1 needs to be amplified, and the amplification efficiency of the detection signal is improved by utilizing the amplification principle of the triode combination tube. The combination tube comprises triodes VT1 and VT2, the base electrode of the triode VT1 is connected with the source electrode of the MOS tube Q1, the collector electrode of the triode VT1 is connected with the emitter electrode of the VT2 to form a +5V power supply, the emitter electrode of the triode VT1 and the base electrode of the VT2 are grounded through a resistor R5, and the collector electrode of the triode VT2 is grounded through a resistor R6 and a capacitor C2 which are connected in parallel.
The output signal of the combination tube is filtered by a capacitor C2 and then sent into a signal conditioning circuit, and in order to avoid the influence of vibration when the cabinet door is closed on the precision of the gravity sensing module, the signal conditioning circuit stabilizes the output signal of the combination tube by utilizing the operational amplifier compensation principle. The signal conditioning circuit comprises an operational amplifier AR1, wherein the non-inverting input terminal of the operational amplifier AR1 is connected with the collector of a triode VT2, the inverting input terminal of the operational amplifier AR1 is connected with the output terminal of the operational amplifier AR1 through a resistor R7 and a capacitor C3 which are connected in parallel, and the inverting input terminal of the operational amplifier AR1 is also grounded through a resistor R8. The capacitor C3 plays a role in signal compensation in the amplification process of the operational amplifier AR1, when the material tray vibrates, an unstable factor is caused to the detection signal output by the gravity sensor P1, and the capacitor C3 can well eliminate the unstable factor, so that the output of the detection signal is more accurate and reliable.
In order to avoid damage to the controller caused by the pressed material tray, the clamp voltage stabilizing circuit is used for clamping and outputting an output signal of the transport amplifier AR 1. The clamping voltage stabilizing circuit comprises diodes D1 and D2, wherein the anode of the diode D1 and the cathode of the diode D2 are connected with the output end of the operational amplifier AR1, the cathode of the voltage stabilizing diode DZ1 and the input end of the controller, the cathode of the diode D1 is connected with a +5V power supply, and the anodes of the diode D2 and the voltage stabilizing diode DZ1 are grounded in parallel. The diodes D1 and D2 form a diode clamping circuit to clamp the output signal of the operational amplifier AR1 in the range of 0-5V for output, and the output signal is sent into the controller after voltage stabilization, thereby effectively preventing the controller from being damaged by abnormal gravity detection signals and prolonging the service life of the control board.
The utility model discloses when specifically using, gravity sensor P1 carries out real-time detection to the commodity weight on the material tray to will detect signal and send into the built-up tube after MOS pipe Q1 is stable and enlarge fast, make gravity sensor P1 signal output have fine stability. The signal conditioning circuit utilizes the operational amplifier compensation principle to stabilize the output signal of the combined tube, and effectively avoids the vibration when the cabinet door is closed to influence the precision of the gravity sensing module. The clamp voltage stabilizing circuit is adopted to clamp and output the output signal of the signal conditioning circuit, so that the damage of the abnormal gravity detection signal to the controller is effectively prevented, and the service life of the control panel is prolonged. And finally, the control panel acquires a weight difference value before and after goods taking on the material tray according to the change amount of the output value of the gravity sensing module, so that the type, weight and quantity of goods taken by a consumer are known.
The above description is provided for further details of the present invention with reference to the specific embodiments, which should not be construed as limiting the present invention; to the utility model discloses affiliated and relevant technical field's technical personnel are based on the utility model discloses under the technical scheme thinking prerequisite, the extension of doing and the replacement of operating method, data all should fall within the utility model discloses within the protection scope.
Claims (5)
1. The utility model provides an automatic sales counter gets material detection device, includes the controller and sets up in the gravity-feed tank below gravity-feed tank response module, its characterized in that: the gravity sensing module comprises a gravity detection amplifying circuit, a signal conditioning circuit and a clamping voltage stabilizing circuit, wherein the gravity detection amplifying circuit comprises a gravity sensor, an output signal of the gravity sensor is sent into the combined pipe after being stabilized by an MOS (metal oxide semiconductor) tube Q1 for rapid amplification, the signal conditioning circuit carries out operational amplification compensation on the output signal of the combined pipe, the stability of the signal is improved, and finally the clamping voltage stabilizing circuit carries out amplitude limiting output on the signal to the controller by utilizing the diode clamping principle to ensure that the detection signal does not exceed the input allowable value of the controller.
2. The vending cabinet pick-up inspection device of claim 1, wherein: the gravity detection amplifying circuit comprises a resistor R1, one end of a resistor R1 is connected with the output end of the gravity sensor, the other end of a resistor R1 is connected with one end of a resistor R2, a resistor R3 and a capacitor C1, the other ends of the resistor R2 and the capacitor C1 are grounded, the other end of the resistor R3 is connected with the grid of an MOS transistor Q1, the drain of the MOS transistor Q1 is connected with a +5V power supply, the source of the MOS transistor Q1 is connected with one end of the resistor R4 and the input end of the combined transistor, and the other end of the resistor R4 is grounded.
3. The vending cabinet pick-up inspection device of claim 2, wherein: the combined tube comprises triodes VT1 and VT2, wherein the base electrode of a triode VT1 is connected with the source electrode of an MOS tube Q1, the collector electrode of a triode VT1 is connected with the emitter electrode of VT2 to form a +5V power supply, the emitter electrode of a triode VT1 and the base electrode of VT2 are grounded through a resistor R5, and the collector electrode of a triode VT2 is grounded through a resistor R6 and a capacitor C2 which are connected in parallel.
4. The vending cabinet pick-up inspection device of claim 3, wherein: the signal conditioning circuit comprises an operational amplifier AR1, wherein the non-inverting input terminal of the operational amplifier AR1 is connected with the collector of a triode VT2, the inverting input terminal of the operational amplifier AR1 is connected with the output terminal of an operational amplifier AR1 through a resistor R7 and a capacitor C3 which are connected in parallel, and the inverting input terminal of the operational amplifier AR1 is also grounded through a resistor R8.
5. The vending cabinet pick-up inspection device of claim 4, wherein: the clamping voltage stabilizing circuit comprises diodes D1 and D2, wherein the anode of the diode D1 and the cathode of the diode D2 are connected with the output end of an operational amplifier AR1, the cathode of a voltage stabilizing diode DZ1 and the input end of a controller, the cathode of the diode D1 is connected with a +5V power supply, and the anodes of the diode D2 and the voltage stabilizing diode DZ1 are grounded in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921726085.6U CN210346870U (en) | 2019-10-15 | 2019-10-15 | Automatic material taking and detecting device for vending cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921726085.6U CN210346870U (en) | 2019-10-15 | 2019-10-15 | Automatic material taking and detecting device for vending cabinet |
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| Publication Number | Publication Date |
|---|---|
| CN210346870U true CN210346870U (en) | 2020-04-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921726085.6U Active CN210346870U (en) | 2019-10-15 | 2019-10-15 | Automatic material taking and detecting device for vending cabinet |
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| Country | Link |
|---|---|
| CN (1) | CN210346870U (en) |
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2019
- 2019-10-15 CN CN201921726085.6U patent/CN210346870U/en active Active
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Effective date of registration: 20200917 Address after: Room 745, 7 / F, building 2, Yabao Oriental International Plaza, 85 Jinshui East Road, Zhengzhou pilot Free Trade Zone, Zhengzhou City, Henan Province Patentee after: Henan Huiqu Huina Technology Co., Ltd Address before: 461000 building 3, Shangde road Overseas Students Pioneer Park, urban and rural integration demonstration zone, Xuchang City, Henan Province Patentee before: Henan huichuhuina Intelligent Technology Co.,Ltd. |
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Address after: Room 503, floor 5, building 2, yard a 1, Hongjunying South Road, Chaoyang District, Beijing 100020 Patentee after: Beijing huiquhuina Technology Co.,Ltd. Address before: 450000 No. 745, floor 7, building 2, Yabao Oriental International Plaza, No. 85, Jinshui East Road, Zhengzhou area (Zhengdong), Henan pilot Free Trade Zone, Zhengzhou City, Henan Province Patentee before: Henan Huiqu Huina Technology Co., Ltd |
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Effective date of registration: 20210927 Address after: 461000 floor 3, building 3, Overseas Students Pioneer Park, Shangde Road, urban-rural integration demonstration zone, Xuchang City, Henan Province Patentee after: Xu Changhui takes Huina Intelligent Technology Co.,Ltd. Address before: Room 503, floor 5, building 2, yard a 1, Hongjunying South Road, Chaoyang District, Beijing 100020 Patentee before: Beijing huiquhuina Technology Co.,Ltd. |