Robot shopping guide wins over real person shopping guide by nearly 90% of users welcome

To the person that loves shopping, a good guide is bought be like close close small boudoir honey, let a person be like mu chun feng, enjoy to the utmost and return, but meet with an attitude is bad, the guide that taking coloured glasses is bought enough corrupt the good mood of whole day.But today, customers have more choices, such as the "robot BOSS" and "the little secretary of the leopard", who are the "cute" robot guides at the 2019 global sources Hong Kong mobile electronics show.So in the real shopping scene, in the face of robot shopping guide and real person shopping guide, who are people more willing to choose?

Recently, a platform launched a netizen voting discussion on this topic.Surprisingly, with the advantages of "emotional stability" and no discrimination in dress, robot shopping guide wins over real person shopping guide, and is welcomed by nearly 90% of netizens!

The debut of the robot BOSS in Hong Kong has gone viral

At the just concluded Hong Kong electronics show, one "cute thing" attracted people's attention. It was the robot "robot BOSS" and "leopard secretary". It was the robot BOSS wearing a hat and a bow tie.When introducing the product, the robot BOSS can not only quickly play pictures or video, but also take pains to answer various personalized inquiries.Thanks to its super sweet voice, cute look and powerful functions, "the little secretary of the leopard" has become the "group pet" of the Hong Kong electronics fair.

The popularity of "the little secretary of the leopard" actually hit some pain points when customers are facing the real person shopping guide.For example, ms wang, a consumer, said, "when a physical shopping just enters the store, some shopping assistants will first look at the whole body of the customer and then decide what kind of attitude to serve the customer, which makes people very embarrassed and unhappy."

In addition to colored glasses, poor service attitude is also easy to make fun of customers.For example, when people are tired or something unpleasant happens, their service attitude is usually difficult to guarantee.

But the above pain point in the robot shopping body will not happen.The robot can let every customer enjoy fair and warm service, not affected by the mood, not affected by the customer's clothes, in addition, such as "leopard secretary" robot is intelligent enough, in addition to shopping guide, but also provide visual directions, multimedia inquiries, push the store offers and other services.

Cheetah mobile's leading robot shopping guide is popular

"Leopard little secretary" sells goods in Hong Kong, get the attention of numerous media.Recently there were even platform launched "guide guide robot OR a human, which one do you choose" the topic of discussion, surprisingly, ninety percent of netizens said welcome to guide robots, guide and select reality of less than ten percent, but there are some net friend says guide service attitude good reality and guide the robot can accept.

In fact, the need for robot shopping guides already exists, and some technology companies have already found the opportunity and laid it out in advance.For example, the "leopard's little secretary" is an AI intelligent service robot from Orion star.Orion star is an intelligent service robot company invested by cheetah mobile in September 2016. Cheetah mobile provides intelligent solutions for the landing of robots.

Besides leopard surprise surprise, Orion star also built the "leopard vendor" and "leopard coffee" products, such as the new retail intelligence robot "leopard vendor" achieved from "people looking for goods" to the "goods to" change, it can automatically go to the place where the stream of, take the initiative to recommend commodities, and it can automatic recharge, automatic replenishment;"Leopard coffee" is based on a Orion star manipulator operation platform, the high quality of mechanical Arm landing unmanned coffee kiosk, it can be 7 * 24 hours of continuous production of coffee, using Arm OS can accurately simulate gold coffee master technique, through the mechanical Arm control software ArmUI intelligent teaching system can also be easily customized personalized taste and garland, automatic monitoring, no unattended "leopard coffee", became the new retail traffic entrance.

The emergence of "leopard secretary", "leopard hawker" and "leopard coffee" all meet the market demand of service industry upgrading -- merchants can realize "cost reduction and efficiency increase" with the help of service robots.I believe that in the future there will be more robot shopping guide to join the ranks of "leopard secretary", to provide more customers with more technology and intimate service!

Link:Tenco

A new generation hall effect current sensor based on ASIC technology is introduced

The market development trend of power electronics industry puts forward requirements for the application of special components.The same is true for current measurements.Basically speaking, in order to obtain a certain measurement accuracy, it requires that the components have the corresponding size and the corresponding cost.This paper introduces a new generation of current sensor, which can improve the performance of current sensor based on open loop hall effect by a specially developed ASIC technology.

At present, we can purchase many hall -ASIC sensors in the market, we can use these sensors to measure the position, magnetic field and current.All these ASIC sensors are mostly used for accurate and rapid current measurement, such as power electronics industry, and have the advantages of high anti-interference for electromagnetic interference.This foundation has led to the development of new integrated components that are particularly suited to these requirements (figure 1).Based on CMOS technology, the new integrated component integrates all the components of the open-loop hall effect current sensor structure into a single chip.The hall array ACTS as a measuring element, followed by an amplifier stage and an extended programming unit and a stable bandgap reference voltage.

The component has the following characteristics:

5 v power supply

A large measurement range from 0.5 to 4 millivolts/gauss

Bias and gain can be programmed (proportional or fixed)

Benchmark input/output

Programmable temperature compensation

Terminal pin has short circuit and ESD protection

Temperature ranges from - 40 ° C to + 125 ° C.

The reference voltage as the zero of the measurement can be programmed in the production process.Can provide half of the supply voltage or fixed 2.5v voltage.Reference voltage can also be provided on the external pins.For example, the reference voltage can through A current external from the A/D converter reference voltage by A 200 Ω internal load impedance function.

parameter

Compared with the traditional hall element, the velocity of the transient current is almost unchanged.The delay time after the transient current with 100A/ * s current change rate (di/dt) is about 4 s, as shown in figure 2.This delay time should be sufficient for short-circuit cutoff and regulation of the current circuit.The slightly longer delay time can be illustrated by hall chip chopper technology, which is used to improve drift parameters.

For sensors used in high EMC environments, one of the key parameters is the performance after the voltage jump (common mode).Figure 3 records the 6 KV/ * s current rate of change (dV/dt), and gives the state after skipping a deviation when the output is about 20mV, which is consistent with the drift of 3% nominal value.Performance is balanced, so it can be filtered externally or internally without bias.

Because of the stability of the chopper, the noise at the sensor output is three times greater than that of a conventional hall element.In general, this noise is approximately 10m/Vpp, corresponding to approximately 1.4% of the output nominal current.Due to the high noise frequency of 500KHz, this noise does not affect normal applications.This parameter should be taken into account for ultra-fast current regulation circuits with high bandwidth.

In terms of temperature drift, which is the most basic parameter for current sensors, the maximum improvement can be achieved by comparing with traditional solutions.Compared with traditional sensors, the deviation drift and gain drift have been improved by a factor of more than 2.When the temperature rises 50 ° C, the maximum deviation drift, 1.6% maximum nominal value.Gain drift, defined as the percentage of the measured value, can reach 2% at worst.These values are excellent for the open-loop hall effect current sensor.

Sensors mounted on printed circuit boards shall be as closely connected to the decoupling capacitance as possible.These capacitors can significantly improve EMC characteristics.Figure 4 shows the wiring diagram, which has the values actually found in the measurement process.However, this wiring will vary slightly depending on the application.

The reference voltage shall have the same value as the supply voltage.

Various applicable design schemes

With this ASIC technology, we have developed four new models of open-loop hall effect current sensors in a range of applications.During the development of the sensor, particular attention was paid to the requirements of the applications covered, the mechanical aspects and the separation and insulation of the electrical and electronic components.For example, in battery-powered vehicles, we have also developed for the first time a special sensor for low voltage applications up to 100V.

HXS

Minimum design for measuring current from a nominal value of 50A to a measurement range of 150A.The sensor has four main main lines, which can be connected in parallel or in series, and enables the element to cover three measuring ranges.

The model range includes six different sensors for various applications, which differ in the current range, various temperature ranges, and core materials.In particular, a sensor for long shielded conductors and capacitive currents associated with these conductors has been developed.Therefore, the core heating caused by high frequency loss is eliminated.The sensor is particularly suitable for frequency converters, power supplies and small UPS devices.

HAIS

This model covers a current range of 50-400a (600A).Meet the requirements for safe operation at a nominal voltage of up to 600V (overvoltage class III, pollution level 2).The main opening can accommodate a total line with a cross section of up to 15 x 8 mm.For mounting to PCB, two additional solder pins are provided, which can also be used to improve EMC characteristics when grounding.

HTFS

With a 22mm opening, the sensor is suitable for cables and general wiring.It may also provide a measurement range of up to 1,200 a.The sensor has extremely stable mechanical properties and can be attached to a printed circuit board with solder pins or screws.The sensor is particularly suitable for battery-powered vehicles such as forklifts or hybrid excavators.For the first time, it is possible to record currents exceeding 1000A through the miniature design.

HFIS

Since the current current sensors are used in various automotive applications, these sensors have been further used in industrial applications.In order to achieve compact design, the main opening is set very small.Therefore, this type of sensor is mainly suitable for various applications with low constant current and high measurement range.Moreover, this type of sensor meets a safety isolation requirement of only up to 100V.Applications include switching networks with low peak currents and battery-powered vehicle components such as wheelchairs and golf clubs.

conclusion

According to the application requirements, we provide customers with several design models.Since only a single component is used, one thing these design models have in common is a high working utilization with good mean time between failures (MTBF).Six sigma tools were used in the development process to eliminate error sources that might eventually have existed in production.

According to European EMC standard, all components have EC identification and safety isolation.All types of sensors will be UL certified.All sensors comply with the European RoHS directive effective 1 July 2006.

Link:Tenco

The new 18W type-c PD 3.0 multi-protocol fast charger can provide more accurate voltage

On April 18, 2019, umc holdings, a leading distributor of semiconductor components for the asia-pacific region, announced the launch of its youshang 18 w type-c PD 3.0 charger solution based on DIODES.

The 18W type-c PD 3.0 multi-protocol fast charger from DIODES, the agency of dailian dayu shang, conforms to PPS specification and is compatible with QC4 and QC4+ protocols to provide more accurate voltage for output.Support iPad Pro PD 60min charge 50%, 150min charge 100%, xiaomi 8 95min charge 100%, full huawei Mate20 Pro 128min.

Picture 1- the charger demonstration board of DIODES based 18W type-c PD3.0

Core technology advantages

This scheme is a complete DIODES scheme: power management + output synchronous rectification + output PD3.0 protocol;

Power management chip: AP39303 USES SOP16 encapsulation and built-in high-voltage switch MOSFET and high voltage 100 v, 700 v "to implement the power primary circuit, high integration of VCC, greatly reduce PCB size and simple layout, its efficiency and EMI countermeasures adopted QR working mode and frequency control to achieve between 22 k to 120 k, the internal use of high pressure to start the pin to make it compatible with X capacitor discharge function low standby power consumption < 35 mw, and have more accurate OCP, OVP, OTP protection function;

Synchronous rectifier chip: APR34709 is packaged with op-8 and has 60V MOSFET with both DCM and QR working modes. The working voltage of ultra-wide VCC is 3.3-16v. Its peripheral circuit only needs 6 components to meet its working needs.

Output PD3.0 protocol: ap43770/1 this protocol chip is certified by USB association, and can be compatible with QC4.0, QC4.0+ and PPS specifications, and can meet the output VBUS control of two MOSFET (n-mosfet or p-mosfet), more accurate OCP, OVP, OTP function, its packaging is only dfn3x3-14.

Picture 2- the block diagram of the charger solution of DIODES based 18W type-c PD3.0

Project specifications

1. Input voltage: 90-264v AC;

2. Output voltage: 5V 3A 9V 2A;

3. Frequency: 47hz-64hz;

4. Standby power consumption < 35mW;

5. Average efficiency: 89%.